[PATCH RFC v7 0/6] Add Unisoc's drm kms module

[PATCH RFC v7 0/6] Add Unisoc's drm kms module

[Kevin Tang]

ChangeList:
v1:
1. only upstream modeset and atomic at first commit. 
2. remove some unused code;
3. use alpha and blend_mode properties;
3. add yaml support;
4. remove auto-adaptive panel driver;
5. bugfix

v2:
1. add sprd crtc and plane module for KMS, preparing for multi crtc&encoder
2. remove gem drivers, use generic CMA handlers
3. remove redundant "module_init", all the sub modules loading by KMS

v3:
1. multi crtc&encoder design have problem, so rollback to v1

v4:
1. update to gcc-linaro-7.5.0
2. update to Linux 5.6-rc3
3. remove pm_runtime support
4. add COMPILE_TEST, remove unused kconfig
5. "drm_dev_put" on drm_unbind
6. fix some naming convention issue
7. remove semaphore lock for crtc flip
8. remove static variables

v5:
1. optimize encoder and connector code implementation
2. use "platform_get_irq" and "platform_get_resource"
3. drop useless function return type, drop unless debug log
4. custom properties should be separate, so drop it
5. use DRM_XXX replase pr_xxx
6. drop dsi&dphy hal callback ops
7. drop unless callback ops checking
8. add comments for sprd dpu structure

v6:
1. Access registers via readl/writel
2. Checking for unsupported KMS properties (format, rotation, blend_mode, etc) on plane_check ops
3. Remove always true checks for dpu core ops

v7:
1. Fix DTC unit name warnings
2. Fix the problem of maintainers
3. Call drmm_mode_config_init to mode config init
4. Embed drm_device in sprd_drm and use devm_drm_dev_alloc
5. Replace DRM_XXX with drm_xxx on KMS module, but not suitable for other subsystems
6. Remove plane_update stuff, dpu handles all the HW update in crtc->atomic_flush
7. Dsi&Dphy Code structure adjustment, all move to "sprd/"

Kevin Tang (6):
  dt-bindings: display: add Unisoc's drm master bindings
  drm/sprd: add Unisoc's drm kms master
  dt-bindings: display: add Unisoc's dpu bindings
  drm/sprd: add Unisoc's drm display controller driver
  dt-bindings: display: add Unisoc's mipi dsi&dphy bindings
  drm/sprd: add Unisoc's drm mipi dsi&dphy driver

 .../display/sprd/sprd,display-subsystem.yaml       |   39 +
 .../bindings/display/sprd/sprd,sharkl3-dpu.yaml    |   83 ++
 .../display/sprd/sprd,sharkl3-dsi-host.yaml        |   98 ++
 .../display/sprd/sprd,sharkl3-dsi-phy.yaml         |   75 +
 drivers/gpu/drm/Kconfig                            |    2 +
 drivers/gpu/drm/Makefile                           |    1 +
 drivers/gpu/drm/sprd/Kconfig                       |   13 +
 drivers/gpu/drm/sprd/Makefile                      |   12 +
 drivers/gpu/drm/sprd/dpu_r2p0.c                    |  636 +++++++++
 drivers/gpu/drm/sprd/dw_dsi_ctrl.c                 |  792 +++++++++++
 drivers/gpu/drm/sprd/dw_dsi_ctrl.h                 | 1475 ++++++++++++++++++++
 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c             |  276 ++++
 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h             |   34 +
 drivers/gpu/drm/sprd/megacores_pll.c               |  315 +++++
 drivers/gpu/drm/sprd/megacores_pll.h               |  146 ++
 drivers/gpu/drm/sprd/sprd_dphy.c                   |  335 +++++
 drivers/gpu/drm/sprd/sprd_dphy.h                   |   39 +
 drivers/gpu/drm/sprd/sprd_dpu.c                    |  501 +++++++
 drivers/gpu/drm/sprd/sprd_dpu.h                    |  217 +++
 drivers/gpu/drm/sprd/sprd_drm.c                    |  263 ++++
 drivers/gpu/drm/sprd/sprd_drm.h                    |   20 +
 drivers/gpu/drm/sprd/sprd_dsi.c                    | 1102 +++++++++++++++
 drivers/gpu/drm/sprd/sprd_dsi.h                    |  105 ++
 23 files changed, 6579 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
 create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dpu.yaml
 create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
 create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-phy.yaml
 create mode 100644 drivers/gpu/drm/sprd/Kconfig
 create mode 100644 drivers/gpu/drm/sprd/Makefile
 create mode 100644 drivers/gpu/drm/sprd/dpu_r2p0.c
 create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl.c
 create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl.h
 create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c
 create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h
 create mode 100644 drivers/gpu/drm/sprd/megacores_pll.c
 create mode 100644 drivers/gpu/drm/sprd/megacores_pll.h
 create mode 100644 drivers/gpu/drm/sprd/sprd_dphy.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_dphy.h
 create mode 100644 drivers/gpu/drm/sprd/sprd_dpu.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_dpu.h
 create mode 100644 drivers/gpu/drm/sprd/sprd_drm.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_drm.h
 create mode 100644 drivers/gpu/drm/sprd/sprd_dsi.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_dsi.h

-- 
2.7.4

[PATCH RFC v7 0/6] Add Unisoc's drm kms module

[Kevin Tang]

ChangeList:
v1:
1. only upstream modeset and atomic at first commit. 
2. remove some unused code;
3. use alpha and blend_mode properties;
3. add yaml support;
4. remove auto-adaptive panel driver;
5. bugfix

v2:
1. add sprd crtc and plane module for KMS, preparing for multi crtc&encoder
2. remove gem drivers, use generic CMA handlers
3. remove redundant "module_init", all the sub modules loading by KMS

v3:
1. multi crtc&encoder design have problem, so rollback to v1

v4:
1. update to gcc-linaro-7.5.0
2. update to Linux 5.6-rc3
3. remove pm_runtime support
4. add COMPILE_TEST, remove unused kconfig
5. "drm_dev_put" on drm_unbind
6. fix some naming convention issue
7. remove semaphore lock for crtc flip
8. remove static variables

v5:
1. optimize encoder and connector code implementation
2. use "platform_get_irq" and "platform_get_resource"
3. drop useless function return type, drop unless debug log
4. custom properties should be separate, so drop it
5. use DRM_XXX replase pr_xxx
6. drop dsi&dphy hal callback ops
7. drop unless callback ops checking
8. add comments for sprd dpu structure

v6:
1. Access registers via readl/writel
2. Checking for unsupported KMS properties (format, rotation, blend_mode, etc) on plane_check ops
3. Remove always true checks for dpu core ops

v7:
1. Fix DTC unit name warnings
2. Fix the problem of maintainers
3. Call drmm_mode_config_init to mode config init
4. Embed drm_device in sprd_drm and use devm_drm_dev_alloc
5. Replace DRM_XXX with drm_xxx on KMS module, but not suitable for other subsystems
6. Remove plane_update stuff, dpu handles all the HW update in crtc->atomic_flush
7. Dsi&Dphy Code structure adjustment, all move to "sprd/"

Kevin Tang (6):
  dt-bindings: display: add Unisoc's drm master bindings
  drm/sprd: add Unisoc's drm kms master
  dt-bindings: display: add Unisoc's dpu bindings
  drm/sprd: add Unisoc's drm display controller driver
  dt-bindings: display: add Unisoc's mipi dsi&dphy bindings
  drm/sprd: add Unisoc's drm mipi dsi&dphy driver

 .../display/sprd/sprd,display-subsystem.yaml       |   39 +
 .../bindings/display/sprd/sprd,sharkl3-dpu.yaml    |   83 ++
 .../display/sprd/sprd,sharkl3-dsi-host.yaml        |   98 ++
 .../display/sprd/sprd,sharkl3-dsi-phy.yaml         |   75 +
 drivers/gpu/drm/Kconfig                            |    2 +
 drivers/gpu/drm/Makefile                           |    1 +
 drivers/gpu/drm/sprd/Kconfig                       |   13 +
 drivers/gpu/drm/sprd/Makefile                      |   12 +
 drivers/gpu/drm/sprd/dpu_r2p0.c                    |  636 +++++++++
 drivers/gpu/drm/sprd/dw_dsi_ctrl.c                 |  792 +++++++++++
 drivers/gpu/drm/sprd/dw_dsi_ctrl.h                 | 1475 ++++++++++++++++++++
 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c             |  276 ++++
 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h             |   34 +
 drivers/gpu/drm/sprd/megacores_pll.c               |  315 +++++
 drivers/gpu/drm/sprd/megacores_pll.h               |  146 ++
 drivers/gpu/drm/sprd/sprd_dphy.c                   |  335 +++++
 drivers/gpu/drm/sprd/sprd_dphy.h                   |   39 +
 drivers/gpu/drm/sprd/sprd_dpu.c                    |  501 +++++++
 drivers/gpu/drm/sprd/sprd_dpu.h                    |  217 +++
 drivers/gpu/drm/sprd/sprd_drm.c                    |  263 ++++
 drivers/gpu/drm/sprd/sprd_drm.h                    |   20 +
 drivers/gpu/drm/sprd/sprd_dsi.c                    | 1102 +++++++++++++++
 drivers/gpu/drm/sprd/sprd_dsi.h                    |  105 ++
 23 files changed, 6579 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
 create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dpu.yaml
 create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
 create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-phy.yaml
 create mode 100644 drivers/gpu/drm/sprd/Kconfig
 create mode 100644 drivers/gpu/drm/sprd/Makefile
 create mode 100644 drivers/gpu/drm/sprd/dpu_r2p0.c
 create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl.c
 create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl.h
 create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c
 create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h
 create mode 100644 drivers/gpu/drm/sprd/megacores_pll.c
 create mode 100644 drivers/gpu/drm/sprd/megacores_pll.h
 create mode 100644 drivers/gpu/drm/sprd/sprd_dphy.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_dphy.h
 create mode 100644 drivers/gpu/drm/sprd/sprd_dpu.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_dpu.h
 create mode 100644 drivers/gpu/drm/sprd/sprd_drm.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_drm.h
 create mode 100644 drivers/gpu/drm/sprd/sprd_dsi.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_dsi.h

-- 
2.7.4

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[PATCH RFC v7 1/6] dt-bindings: display: add Unisoc's drm master bindings

[Kevin Tang]

From: Kevin Tang <kevin.tang@unisoc.com>

The Unisoc DRM master device is a virtual device needed to list all
DPU devices or other display interface nodes that comprise the
graphics subsystem

RFC v7:
  - Fix DTC unit name warnings
  - Fix the problem of maintainers

Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
---
 .../display/sprd/sprd,display-subsystem.yaml       | 39 ++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml

diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
new file mode 100644
index 0000000..9487a39
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
@@ -0,0 +1,39 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/sprd/sprd,display-subsystem.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Unisoc DRM master device
+
+maintainers:
+  - Kevin Tang <kevin.tang@unisoc.com>
+
+description: |
+  The Unisoc DRM master device is a virtual device needed to list all
+  DPU devices or other display interface nodes that comprise the
+  graphics subsystem.
+
+properties:
+  compatible:
+    const: sprd,display-subsystem
+
+  ports:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description:
+      Should contain a list of phandles pointing to display interface port
+      of DPU devices.
+
+required:
+  - compatible
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+    display-subsystem {
+        compatible = "sprd,display-subsystem";
+        ports = <&dpu_out>;
+    };
+
-- 
2.7.4

[PATCH RFC v7 1/6] dt-bindings: display: add Unisoc's drm master bindings

[Kevin Tang]

From: Kevin Tang <kevin.tang@unisoc.com>

The Unisoc DRM master device is a virtual device needed to list all
DPU devices or other display interface nodes that comprise the
graphics subsystem

RFC v7:
  - Fix DTC unit name warnings
  - Fix the problem of maintainers

Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
---
 .../display/sprd/sprd,display-subsystem.yaml       | 39 ++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml

diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
new file mode 100644
index 0000000..9487a39
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
@@ -0,0 +1,39 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/sprd/sprd,display-subsystem.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Unisoc DRM master device
+
+maintainers:
+  - Kevin Tang <kevin.tang@unisoc.com>
+
+description: |
+  The Unisoc DRM master device is a virtual device needed to list all
+  DPU devices or other display interface nodes that comprise the
+  graphics subsystem.
+
+properties:
+  compatible:
+    const: sprd,display-subsystem
+
+  ports:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description:
+      Should contain a list of phandles pointing to display interface port
+      of DPU devices.
+
+required:
+  - compatible
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+    display-subsystem {
+        compatible = "sprd,display-subsystem";
+        ports = <&dpu_out>;
+    };
+
-- 
2.7.4

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Re: [PATCH RFC v7 1/6] dt-bindings: display: add Unisoc's drm master bindings

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 2069 bytes --]

Hi!

On Mon, Sep 28, 2020 at 02:27:35PM +0800, Kevin Tang wrote:
> From: Kevin Tang <kevin.tang@unisoc.com>
> 
> The Unisoc DRM master device is a virtual device needed to list all
> DPU devices or other display interface nodes that comprise the
> graphics subsystem
> 
> RFC v7:
>   - Fix DTC unit name warnings
>   - Fix the problem of maintainers
> 
> Cc: Orson Zhai <orsonzhai@gmail.com>
> Cc: Chunyan Zhang <zhang.lyra@gmail.com>
> Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
> ---
>  .../display/sprd/sprd,display-subsystem.yaml       | 39 ++++++++++++++++++++++
>  1 file changed, 39 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> new file mode 100644
> index 0000000..9487a39
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> @@ -0,0 +1,39 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/sprd/sprd,display-subsystem.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Unisoc DRM master device
> +
> +maintainers:
> +  - Kevin Tang <kevin.tang@unisoc.com>
> +
> +description: |
> +  The Unisoc DRM master device is a virtual device needed to list all
> +  DPU devices or other display interface nodes that comprise the
> +  graphics subsystem.
> +
> +properties:
> +  compatible:
> +    const: sprd,display-subsystem
> +
> +  ports:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    description:
> +      Should contain a list of phandles pointing to display interface port
> +      of DPU devices.

Generally speaking, driver-specific properties should be prefixed by the
vendor name to avoid any conflict with generic properties (like the
OF-Graph ports subnode in this case)

Maxime

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Re: [PATCH RFC v7 1/6] dt-bindings: display: add Unisoc's drm master bindings

[Maxime Ripard]

[-- Attachment #1.1: Type: text/plain, Size: 2069 bytes --]

Hi!

On Mon, Sep 28, 2020 at 02:27:35PM +0800, Kevin Tang wrote:
> From: Kevin Tang <kevin.tang@unisoc.com>
> 
> The Unisoc DRM master device is a virtual device needed to list all
> DPU devices or other display interface nodes that comprise the
> graphics subsystem
> 
> RFC v7:
>   - Fix DTC unit name warnings
>   - Fix the problem of maintainers
> 
> Cc: Orson Zhai <orsonzhai@gmail.com>
> Cc: Chunyan Zhang <zhang.lyra@gmail.com>
> Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
> ---
>  .../display/sprd/sprd,display-subsystem.yaml       | 39 ++++++++++++++++++++++
>  1 file changed, 39 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> new file mode 100644
> index 0000000..9487a39
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> @@ -0,0 +1,39 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/sprd/sprd,display-subsystem.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Unisoc DRM master device
> +
> +maintainers:
> +  - Kevin Tang <kevin.tang@unisoc.com>
> +
> +description: |
> +  The Unisoc DRM master device is a virtual device needed to list all
> +  DPU devices or other display interface nodes that comprise the
> +  graphics subsystem.
> +
> +properties:
> +  compatible:
> +    const: sprd,display-subsystem
> +
> +  ports:
> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> +    description:
> +      Should contain a list of phandles pointing to display interface port
> +      of DPU devices.

Generally speaking, driver-specific properties should be prefixed by the
vendor name to avoid any conflict with generic properties (like the
OF-Graph ports subnode in this case)

Maxime

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[-- Attachment #2: Type: text/plain, Size: 160 bytes --]

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Re: [PATCH RFC v7 1/6] dt-bindings: display: add Unisoc's drm master bindings

[Rob Herring]

On Mon, Sep 28, 2020 at 3:17 AM Maxime Ripard <maxime@cerno.tech> wrote:
>
> Hi!
>
> On Mon, Sep 28, 2020 at 02:27:35PM +0800, Kevin Tang wrote:
> > From: Kevin Tang <kevin.tang@unisoc.com>
> >
> > The Unisoc DRM master device is a virtual device needed to list all
> > DPU devices or other display interface nodes that comprise the
> > graphics subsystem
> >
> > RFC v7:
> >   - Fix DTC unit name warnings
> >   - Fix the problem of maintainers
> >
> > Cc: Orson Zhai <orsonzhai@gmail.com>
> > Cc: Chunyan Zhang <zhang.lyra@gmail.com>
> > Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
> > ---
> >  .../display/sprd/sprd,display-subsystem.yaml       | 39 ++++++++++++++++++++++
> >  1 file changed, 39 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> > new file mode 100644
> > index 0000000..9487a39
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> > @@ -0,0 +1,39 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/display/sprd/sprd,display-subsystem.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Unisoc DRM master device
> > +
> > +maintainers:
> > +  - Kevin Tang <kevin.tang@unisoc.com>
> > +
> > +description: |
> > +  The Unisoc DRM master device is a virtual device needed to list all
> > +  DPU devices or other display interface nodes that comprise the
> > +  graphics subsystem.
> > +
> > +properties:
> > +  compatible:
> > +    const: sprd,display-subsystem
> > +
> > +  ports:
> > +    $ref: /schemas/types.yaml#/definitions/phandle-array
> > +    description:
> > +      Should contain a list of phandles pointing to display interface port
> > +      of DPU devices.
>
> Generally speaking, driver-specific properties should be prefixed by the
> vendor name to avoid any conflict with generic properties (like the
> OF-Graph ports subnode in this case)

We try to avoid this virtual node altogether which I commented about
on v6 which was ignored.

Rob

Re: [PATCH RFC v7 1/6] dt-bindings: display: add Unisoc's drm master bindings

[Rob Herring]

On Mon, Sep 28, 2020 at 3:17 AM Maxime Ripard <maxime@cerno.tech> wrote:
>
> Hi!
>
> On Mon, Sep 28, 2020 at 02:27:35PM +0800, Kevin Tang wrote:
> > From: Kevin Tang <kevin.tang@unisoc.com>
> >
> > The Unisoc DRM master device is a virtual device needed to list all
> > DPU devices or other display interface nodes that comprise the
> > graphics subsystem
> >
> > RFC v7:
> >   - Fix DTC unit name warnings
> >   - Fix the problem of maintainers
> >
> > Cc: Orson Zhai <orsonzhai@gmail.com>
> > Cc: Chunyan Zhang <zhang.lyra@gmail.com>
> > Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
> > ---
> >  .../display/sprd/sprd,display-subsystem.yaml       | 39 ++++++++++++++++++++++
> >  1 file changed, 39 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> > new file mode 100644
> > index 0000000..9487a39
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> > @@ -0,0 +1,39 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/display/sprd/sprd,display-subsystem.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Unisoc DRM master device
> > +
> > +maintainers:
> > +  - Kevin Tang <kevin.tang@unisoc.com>
> > +
> > +description: |
> > +  The Unisoc DRM master device is a virtual device needed to list all
> > +  DPU devices or other display interface nodes that comprise the
> > +  graphics subsystem.
> > +
> > +properties:
> > +  compatible:
> > +    const: sprd,display-subsystem
> > +
> > +  ports:
> > +    $ref: /schemas/types.yaml#/definitions/phandle-array
> > +    description:
> > +      Should contain a list of phandles pointing to display interface port
> > +      of DPU devices.
>
> Generally speaking, driver-specific properties should be prefixed by the
> vendor name to avoid any conflict with generic properties (like the
> OF-Graph ports subnode in this case)

We try to avoid this virtual node altogether which I commented about
on v6 which was ignored.

Rob
_______________________________________________
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Re: [PATCH RFC v7 1/6] dt-bindings: display: add Unisoc's drm master bindings

[Kevin Tang]

Hi Rob,
Component framework include master and component, here is master subnode.
It seems that everyone else does it, why not me?

Your comments on v6:
"We generally try to avoid this virtual node as it doesn't represent
any h/w. Can't you bind the driver to the DPU directly?"

I'm sorry, maybe is my careless, I still don't understand why and how to do it

Rob Herring <robh+dt@kernel.org> 于2020年9月29日周二 上午12:28写道：

>
> On Mon, Sep 28, 2020 at 3:17 AM Maxime Ripard <maxime@cerno.tech> wrote:
> >
> > Hi!
> >
> > On Mon, Sep 28, 2020 at 02:27:35PM +0800, Kevin Tang wrote:
> > > From: Kevin Tang <kevin.tang@unisoc.com>
> > >
> > > The Unisoc DRM master device is a virtual device needed to list all
> > > DPU devices or other display interface nodes that comprise the
> > > graphics subsystem
> > >
> > > RFC v7:
> > >   - Fix DTC unit name warnings
> > >   - Fix the problem of maintainers
> > >
> > > Cc: Orson Zhai <orsonzhai@gmail.com>
> > > Cc: Chunyan Zhang <zhang.lyra@gmail.com>
> > > Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
> > > ---
> > >  .../display/sprd/sprd,display-subsystem.yaml       | 39 ++++++++++++++++++++++
> > >  1 file changed, 39 insertions(+)
> > >  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> > >
> > > diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> > > new file mode 100644
> > > index 0000000..9487a39
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> > > @@ -0,0 +1,39 @@
> > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > > +%YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/display/sprd/sprd,display-subsystem.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: Unisoc DRM master device
> > > +
> > > +maintainers:
> > > +  - Kevin Tang <kevin.tang@unisoc.com>
> > > +
> > > +description: |
> > > +  The Unisoc DRM master device is a virtual device needed to list all
> > > +  DPU devices or other display interface nodes that comprise the
> > > +  graphics subsystem.
> > > +
> > > +properties:
> > > +  compatible:
> > > +    const: sprd,display-subsystem
> > > +
> > > +  ports:
> > > +    $ref: /schemas/types.yaml#/definitions/phandle-array
> > > +    description:
> > > +      Should contain a list of phandles pointing to display interface port
> > > +      of DPU devices.
> >
> > Generally speaking, driver-specific properties should be prefixed by the
> > vendor name to avoid any conflict with generic properties (like the
> > OF-Graph ports subnode in this case)
>
> We try to avoid this virtual node altogether which I commented about
> on v6 which was ignored.
>
> Rob

Re: [PATCH RFC v7 1/6] dt-bindings: display: add Unisoc's drm master bindings

[Kevin Tang]

Hi Rob,
Component framework include master and component, here is master subnode.
It seems that everyone else does it, why not me?

Your comments on v6:
"We generally try to avoid this virtual node as it doesn't represent
any h/w. Can't you bind the driver to the DPU directly?"

I'm sorry, maybe is my careless, I still don't understand why and how to do it

Rob Herring <robh+dt@kernel.org> 于2020年9月29日周二 上午12:28写道：

>
> On Mon, Sep 28, 2020 at 3:17 AM Maxime Ripard <maxime@cerno.tech> wrote:
> >
> > Hi!
> >
> > On Mon, Sep 28, 2020 at 02:27:35PM +0800, Kevin Tang wrote:
> > > From: Kevin Tang <kevin.tang@unisoc.com>
> > >
> > > The Unisoc DRM master device is a virtual device needed to list all
> > > DPU devices or other display interface nodes that comprise the
> > > graphics subsystem
> > >
> > > RFC v7:
> > >   - Fix DTC unit name warnings
> > >   - Fix the problem of maintainers
> > >
> > > Cc: Orson Zhai <orsonzhai@gmail.com>
> > > Cc: Chunyan Zhang <zhang.lyra@gmail.com>
> > > Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
> > > ---
> > >  .../display/sprd/sprd,display-subsystem.yaml       | 39 ++++++++++++++++++++++
> > >  1 file changed, 39 insertions(+)
> > >  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> > >
> > > diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> > > new file mode 100644
> > > index 0000000..9487a39
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> > > @@ -0,0 +1,39 @@
> > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > > +%YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/display/sprd/sprd,display-subsystem.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: Unisoc DRM master device
> > > +
> > > +maintainers:
> > > +  - Kevin Tang <kevin.tang@unisoc.com>
> > > +
> > > +description: |
> > > +  The Unisoc DRM master device is a virtual device needed to list all
> > > +  DPU devices or other display interface nodes that comprise the
> > > +  graphics subsystem.
> > > +
> > > +properties:
> > > +  compatible:
> > > +    const: sprd,display-subsystem
> > > +
> > > +  ports:
> > > +    $ref: /schemas/types.yaml#/definitions/phandle-array
> > > +    description:
> > > +      Should contain a list of phandles pointing to display interface port
> > > +      of DPU devices.
> >
> > Generally speaking, driver-specific properties should be prefixed by the
> > vendor name to avoid any conflict with generic properties (like the
> > OF-Graph ports subnode in this case)
>
> We try to avoid this virtual node altogether which I commented about
> on v6 which was ignored.
>
> Rob
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH RFC v7 1/6] dt-bindings: display: add Unisoc's drm master bindings

[Chunyan Zhang]

On Tue, 29 Sep 2020 at 14:35, Kevin Tang <kevin3.tang@gmail.com> wrote:
>
> Hi Rob,
> Component framework include master and component, here is master subnode.
> It seems that everyone else does it, why not me?
>
> Your comments on v6:
> "We generally try to avoid this virtual node as it doesn't represent
> any h/w. Can't you bind the driver to the DPU directly?"
>
> I'm sorry, maybe is my careless, I still don't understand why and how to do it

Devicetree is used to describe hardware rather than virtual things
like "sprd,display-subsystem" which is not a real device.
That's what I understand for Rob's comments here.

Chunyan

>
> Rob Herring <robh+dt@kernel.org> 于2020年9月29日周二 上午12:28写道：
>
> >
> > On Mon, Sep 28, 2020 at 3:17 AM Maxime Ripard <maxime@cerno.tech> wrote:
> > >
> > > Hi!
> > >
> > > On Mon, Sep 28, 2020 at 02:27:35PM +0800, Kevin Tang wrote:
> > > > From: Kevin Tang <kevin.tang@unisoc.com>
> > > >
> > > > The Unisoc DRM master device is a virtual device needed to list all
> > > > DPU devices or other display interface nodes that comprise the
> > > > graphics subsystem
> > > >
> > > > RFC v7:
> > > >   - Fix DTC unit name warnings
> > > >   - Fix the problem of maintainers
> > > >
> > > > Cc: Orson Zhai <orsonzhai@gmail.com>
> > > > Cc: Chunyan Zhang <zhang.lyra@gmail.com>
> > > > Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
> > > > ---
> > > >  .../display/sprd/sprd,display-subsystem.yaml       | 39 ++++++++++++++++++++++
> > > >  1 file changed, 39 insertions(+)
> > > >  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> > > >
> > > > diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> > > > new file mode 100644
> > > > index 0000000..9487a39
> > > > --- /dev/null
> > > > +++ b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> > > > @@ -0,0 +1,39 @@
> > > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > > > +%YAML 1.2
> > > > +---
> > > > +$id: http://devicetree.org/schemas/display/sprd/sprd,display-subsystem.yaml#
> > > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > > +
> > > > +title: Unisoc DRM master device
> > > > +
> > > > +maintainers:
> > > > +  - Kevin Tang <kevin.tang@unisoc.com>
> > > > +
> > > > +description: |
> > > > +  The Unisoc DRM master device is a virtual device needed to list all
> > > > +  DPU devices or other display interface nodes that comprise the
> > > > +  graphics subsystem.
> > > > +
> > > > +properties:
> > > > +  compatible:
> > > > +    const: sprd,display-subsystem
> > > > +
> > > > +  ports:
> > > > +    $ref: /schemas/types.yaml#/definitions/phandle-array
> > > > +    description:
> > > > +      Should contain a list of phandles pointing to display interface port
> > > > +      of DPU devices.
> > >
> > > Generally speaking, driver-specific properties should be prefixed by the
> > > vendor name to avoid any conflict with generic properties (like the
> > > OF-Graph ports subnode in this case)
> >
> > We try to avoid this virtual node altogether which I commented about
> > on v6 which was ignored.
> >
> > Rob

Re: [PATCH RFC v7 1/6] dt-bindings: display: add Unisoc's drm master bindings

[Chunyan Zhang]

On Tue, 29 Sep 2020 at 14:35, Kevin Tang <kevin3.tang@gmail.com> wrote:
>
> Hi Rob,
> Component framework include master and component, here is master subnode.
> It seems that everyone else does it, why not me?
>
> Your comments on v6:
> "We generally try to avoid this virtual node as it doesn't represent
> any h/w. Can't you bind the driver to the DPU directly?"
>
> I'm sorry, maybe is my careless, I still don't understand why and how to do it

Devicetree is used to describe hardware rather than virtual things
like "sprd,display-subsystem" which is not a real device.
That's what I understand for Rob's comments here.

Chunyan

>
> Rob Herring <robh+dt@kernel.org> 于2020年9月29日周二 上午12:28写道：
>
> >
> > On Mon, Sep 28, 2020 at 3:17 AM Maxime Ripard <maxime@cerno.tech> wrote:
> > >
> > > Hi!
> > >
> > > On Mon, Sep 28, 2020 at 02:27:35PM +0800, Kevin Tang wrote:
> > > > From: Kevin Tang <kevin.tang@unisoc.com>
> > > >
> > > > The Unisoc DRM master device is a virtual device needed to list all
> > > > DPU devices or other display interface nodes that comprise the
> > > > graphics subsystem
> > > >
> > > > RFC v7:
> > > >   - Fix DTC unit name warnings
> > > >   - Fix the problem of maintainers
> > > >
> > > > Cc: Orson Zhai <orsonzhai@gmail.com>
> > > > Cc: Chunyan Zhang <zhang.lyra@gmail.com>
> > > > Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
> > > > ---
> > > >  .../display/sprd/sprd,display-subsystem.yaml       | 39 ++++++++++++++++++++++
> > > >  1 file changed, 39 insertions(+)
> > > >  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> > > >
> > > > diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> > > > new file mode 100644
> > > > index 0000000..9487a39
> > > > --- /dev/null
> > > > +++ b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
> > > > @@ -0,0 +1,39 @@
> > > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > > > +%YAML 1.2
> > > > +---
> > > > +$id: http://devicetree.org/schemas/display/sprd/sprd,display-subsystem.yaml#
> > > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > > +
> > > > +title: Unisoc DRM master device
> > > > +
> > > > +maintainers:
> > > > +  - Kevin Tang <kevin.tang@unisoc.com>
> > > > +
> > > > +description: |
> > > > +  The Unisoc DRM master device is a virtual device needed to list all
> > > > +  DPU devices or other display interface nodes that comprise the
> > > > +  graphics subsystem.
> > > > +
> > > > +properties:
> > > > +  compatible:
> > > > +    const: sprd,display-subsystem
> > > > +
> > > > +  ports:
> > > > +    $ref: /schemas/types.yaml#/definitions/phandle-array
> > > > +    description:
> > > > +      Should contain a list of phandles pointing to display interface port
> > > > +      of DPU devices.
> > >
> > > Generally speaking, driver-specific properties should be prefixed by the
> > > vendor name to avoid any conflict with generic properties (like the
> > > OF-Graph ports subnode in this case)
> >
> > We try to avoid this virtual node altogether which I commented about
> > on v6 which was ignored.
> >
> > Rob
_______________________________________________
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https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH RFC v7 2/6] drm/sprd: add Unisoc's drm kms master

[Kevin Tang]

Adds drm support for the Unisoc's display subsystem.

This is drm kms driver, this driver provides support for the
application framework in Android, Yocto and more.

Application framework can access Unisoc's display internel
peripherals through libdrm or libkms, it's test ok by modetest
(DRM/KMS test tool) and Android HWComposer.

RFC v7:
  - call drmm_mode_config_init to mode config init
  - embed drm_device in sprd_drm and use devm_drm_dev_alloc
  - replace DRM_XXX with drm_xxx
  - Kconfig optimization

Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
---
 drivers/gpu/drm/Kconfig         |   2 +
 drivers/gpu/drm/Makefile        |   1 +
 drivers/gpu/drm/sprd/Kconfig    |  12 +++
 drivers/gpu/drm/sprd/Makefile   |   5 +
 drivers/gpu/drm/sprd/sprd_drm.c | 222 ++++++++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/sprd/sprd_drm.h |  16 +++
 6 files changed, 258 insertions(+)
 create mode 100644 drivers/gpu/drm/sprd/Kconfig
 create mode 100644 drivers/gpu/drm/sprd/Makefile
 create mode 100644 drivers/gpu/drm/sprd/sprd_drm.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_drm.h

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 147d61b..15b4e13 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -388,6 +388,8 @@ source "drivers/gpu/drm/tidss/Kconfig"
 
 source "drivers/gpu/drm/xlnx/Kconfig"
 
+source "drivers/gpu/drm/sprd/Kconfig"
+
 # Keep legacy drivers last
 
 menuconfig DRM_LEGACY
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 2f31579..42d1cdd 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -124,3 +124,4 @@ obj-$(CONFIG_DRM_ASPEED_GFX) += aspeed/
 obj-$(CONFIG_DRM_MCDE) += mcde/
 obj-$(CONFIG_DRM_TIDSS) += tidss/
 obj-y			+= xlnx/
+obj-$(CONFIG_DRM_SPRD) += sprd/
diff --git a/drivers/gpu/drm/sprd/Kconfig b/drivers/gpu/drm/sprd/Kconfig
new file mode 100644
index 0000000..6e80cc9
--- /dev/null
+++ b/drivers/gpu/drm/sprd/Kconfig
@@ -0,0 +1,12 @@
+config DRM_SPRD
+	tristate "DRM Support for Unisoc SoCs Platform"
+	depends on ARCH_SPRD || COMPILE_TEST
+	depends on DRM && OF
+	select DRM_KMS_HELPER
+	select DRM_GEM_CMA_HELPER
+	select DRM_KMS_CMA_HELPER
+	select DRM_MIPI_DSI
+	help
+	  Choose this option if you have a Unisoc chipset.
+	  If M is selected the module will be called sprd_drm.
+
diff --git a/drivers/gpu/drm/sprd/Makefile b/drivers/gpu/drm/sprd/Makefile
new file mode 100644
index 0000000..86d95d9
--- /dev/null
+++ b/drivers/gpu/drm/sprd/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+
+subdir-ccflags-y += -I$(srctree)/$(src)
+
+obj-y := sprd_drm.o
diff --git a/drivers/gpu/drm/sprd/sprd_drm.c b/drivers/gpu/drm/sprd/sprd_drm.c
new file mode 100644
index 0000000..ec101de
--- /dev/null
+++ b/drivers/gpu/drm/sprd/sprd_drm.c
@@ -0,0 +1,222 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#include <linux/component.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_graph.h>
+#include <linux/of_platform.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_of.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
+
+#include "sprd_drm.h"
+
+#define DRIVER_NAME	"sprd"
+#define DRIVER_DESC	"Spreadtrum SoCs' DRM Driver"
+#define DRIVER_DATE	"20200201"
+#define DRIVER_MAJOR	1
+#define DRIVER_MINOR	0
+
+static const struct drm_mode_config_helper_funcs sprd_drm_mode_config_helper = {
+	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
+};
+
+static const struct drm_mode_config_funcs sprd_drm_mode_config_funcs = {
+	.fb_create = drm_gem_fb_create,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+};
+
+static void sprd_drm_mode_config_init(struct drm_device *drm)
+{
+	drm->mode_config.min_width = 0;
+	drm->mode_config.min_height = 0;
+	drm->mode_config.max_width = 8192;
+	drm->mode_config.max_height = 8192;
+	drm->mode_config.allow_fb_modifiers = true;
+
+	drm->mode_config.funcs = &sprd_drm_mode_config_funcs;
+	drm->mode_config.helper_private = &sprd_drm_mode_config_helper;
+}
+
+DEFINE_DRM_GEM_CMA_FOPS(sprd_drm_fops);
+
+static struct drm_driver sprd_drm_drv = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+	.fops			= &sprd_drm_fops,
+
+	/* GEM Operations */
+	DRM_GEM_CMA_DRIVER_OPS,
+
+	.name			= DRIVER_NAME,
+	.desc			= DRIVER_DESC,
+	.date			= DRIVER_DATE,
+	.major			= DRIVER_MAJOR,
+	.minor			= DRIVER_MINOR,
+};
+
+static int sprd_drm_bind(struct device *dev)
+{
+	struct drm_device *drm = dev_get_drvdata(dev);
+	int ret;
+
+	ret = drmm_mode_config_init(drm);
+	if (ret)
+		return ret;
+
+	sprd_drm_mode_config_init(drm);
+
+	/* bind and init sub drivers */
+	ret = component_bind_all(drm->dev, drm);
+	if (ret) {
+		drm_err(drm, "failed to bind all component.\n");
+		goto err_dc_cleanup;
+	}
+
+	/* vblank init */
+	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
+	if (ret) {
+		drm_err(drm, "failed to initialize vblank.\n");
+		goto err_unbind_all;
+	}
+	/* with irq_enabled = true, we can use the vblank feature. */
+	drm->irq_enabled = true;
+
+	/* reset all the states of crtc/plane/encoder/connector */
+	drm_mode_config_reset(drm);
+
+	/* init kms poll for handling hpd */
+	drm_kms_helper_poll_init(drm);
+
+	ret = drm_dev_register(drm, 0);
+	if (ret < 0)
+		goto err_kms_helper_poll_fini;
+
+	return 0;
+
+err_kms_helper_poll_fini:
+	drm_kms_helper_poll_fini(drm);
+err_unbind_all:
+	component_unbind_all(drm->dev, drm);
+err_dc_cleanup:
+	drm_mode_config_cleanup(drm);
+	return ret;
+}
+
+static void sprd_drm_unbind(struct device *dev)
+{
+	struct drm_device *drm = dev_get_drvdata(dev);
+
+	drm_dev_unregister(drm);
+
+	drm_kms_helper_poll_fini(drm);
+
+	drm_mode_config_cleanup(drm);
+
+	component_unbind_all(drm->dev, drm);
+}
+
+static const struct component_master_ops drm_component_ops = {
+	.bind = sprd_drm_bind,
+	.unbind = sprd_drm_unbind,
+};
+
+static int compare_of(struct device *dev, void *data)
+{
+	return dev->of_node == data;
+}
+
+static int sprd_drm_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct drm_device *drm;
+	struct sprd_drm *sprd;
+	int ret;
+
+	sprd = devm_drm_dev_alloc(dev, &sprd_drm_drv, struct sprd_drm, drm);
+	if (IS_ERR(sprd))
+		return PTR_ERR(sprd);
+
+	drm = &sprd->drm;
+
+	ret = dma_set_mask_and_coherent(dev, ~0UL);
+	if (ret) {
+		drm_err(drm, "dma_set_mask_and_coherent failed (%d)\n", ret);
+		return ret;
+	}
+
+	platform_set_drvdata(pdev, drm);
+
+	return drm_of_component_probe(dev, compare_of, &drm_component_ops);
+}
+
+static int sprd_drm_remove(struct platform_device *pdev)
+{
+	component_master_del(&pdev->dev, &drm_component_ops);
+	return 0;
+}
+
+static void sprd_drm_shutdown(struct platform_device *pdev)
+{
+	struct drm_device *drm = platform_get_drvdata(pdev);
+
+	if (!drm) {
+		drm_warn(drm, "drm device is not available, no shutdown\n");
+		return;
+	}
+
+	drm_atomic_helper_shutdown(drm);
+}
+
+static const struct of_device_id drm_match_table[] = {
+	{ .compatible = "sprd,display-subsystem", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, drm_match_table);
+
+static struct platform_driver sprd_drm_driver = {
+	.probe = sprd_drm_probe,
+	.remove = sprd_drm_remove,
+	.shutdown = sprd_drm_shutdown,
+	.driver = {
+		.name = "sprd-drm-drv",
+		.of_match_table = drm_match_table,
+	},
+};
+
+static struct platform_driver *sprd_drm_drivers[]  = {
+	&sprd_drm_driver,
+};
+
+static int __init sprd_drm_init(void)
+{
+	int ret;
+
+	ret = platform_register_drivers(sprd_drm_drivers,
+					ARRAY_SIZE(sprd_drm_drivers));
+	return ret;
+}
+
+static void __exit sprd_drm_exit(void)
+{
+	platform_unregister_drivers(sprd_drm_drivers,
+				    ARRAY_SIZE(sprd_drm_drivers));
+}
+
+module_init(sprd_drm_init);
+module_exit(sprd_drm_exit);
+
+MODULE_AUTHOR("Leon He <leon.he@unisoc.com>");
+MODULE_AUTHOR("Kevin Tang <kevin.tang@unisoc.com>");
+MODULE_DESCRIPTION("Unisoc DRM KMS Master Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/sprd/sprd_drm.h b/drivers/gpu/drm/sprd/sprd_drm.h
new file mode 100644
index 0000000..9781fd5
--- /dev/null
+++ b/drivers/gpu/drm/sprd/sprd_drm.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#ifndef _SPRD_DRM_H_
+#define _SPRD_DRM_H_
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_print.h>
+
+struct sprd_drm {
+	struct drm_device drm;
+};
+
+#endif /* _SPRD_DRM_H_ */
-- 
2.7.4

[PATCH RFC v7 2/6] drm/sprd: add Unisoc's drm kms master

[Kevin Tang]

Adds drm support for the Unisoc's display subsystem.

This is drm kms driver, this driver provides support for the
application framework in Android, Yocto and more.

Application framework can access Unisoc's display internel
peripherals through libdrm or libkms, it's test ok by modetest
(DRM/KMS test tool) and Android HWComposer.

RFC v7:
  - call drmm_mode_config_init to mode config init
  - embed drm_device in sprd_drm and use devm_drm_dev_alloc
  - replace DRM_XXX with drm_xxx
  - Kconfig optimization

Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
---
 drivers/gpu/drm/Kconfig         |   2 +
 drivers/gpu/drm/Makefile        |   1 +
 drivers/gpu/drm/sprd/Kconfig    |  12 +++
 drivers/gpu/drm/sprd/Makefile   |   5 +
 drivers/gpu/drm/sprd/sprd_drm.c | 222 ++++++++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/sprd/sprd_drm.h |  16 +++
 6 files changed, 258 insertions(+)
 create mode 100644 drivers/gpu/drm/sprd/Kconfig
 create mode 100644 drivers/gpu/drm/sprd/Makefile
 create mode 100644 drivers/gpu/drm/sprd/sprd_drm.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_drm.h

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 147d61b..15b4e13 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -388,6 +388,8 @@ source "drivers/gpu/drm/tidss/Kconfig"
 
 source "drivers/gpu/drm/xlnx/Kconfig"
 
+source "drivers/gpu/drm/sprd/Kconfig"
+
 # Keep legacy drivers last
 
 menuconfig DRM_LEGACY
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 2f31579..42d1cdd 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -124,3 +124,4 @@ obj-$(CONFIG_DRM_ASPEED_GFX) += aspeed/
 obj-$(CONFIG_DRM_MCDE) += mcde/
 obj-$(CONFIG_DRM_TIDSS) += tidss/
 obj-y			+= xlnx/
+obj-$(CONFIG_DRM_SPRD) += sprd/
diff --git a/drivers/gpu/drm/sprd/Kconfig b/drivers/gpu/drm/sprd/Kconfig
new file mode 100644
index 0000000..6e80cc9
--- /dev/null
+++ b/drivers/gpu/drm/sprd/Kconfig
@@ -0,0 +1,12 @@
+config DRM_SPRD
+	tristate "DRM Support for Unisoc SoCs Platform"
+	depends on ARCH_SPRD || COMPILE_TEST
+	depends on DRM && OF
+	select DRM_KMS_HELPER
+	select DRM_GEM_CMA_HELPER
+	select DRM_KMS_CMA_HELPER
+	select DRM_MIPI_DSI
+	help
+	  Choose this option if you have a Unisoc chipset.
+	  If M is selected the module will be called sprd_drm.
+
diff --git a/drivers/gpu/drm/sprd/Makefile b/drivers/gpu/drm/sprd/Makefile
new file mode 100644
index 0000000..86d95d9
--- /dev/null
+++ b/drivers/gpu/drm/sprd/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+
+subdir-ccflags-y += -I$(srctree)/$(src)
+
+obj-y := sprd_drm.o
diff --git a/drivers/gpu/drm/sprd/sprd_drm.c b/drivers/gpu/drm/sprd/sprd_drm.c
new file mode 100644
index 0000000..ec101de
--- /dev/null
+++ b/drivers/gpu/drm/sprd/sprd_drm.c
@@ -0,0 +1,222 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#include <linux/component.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_graph.h>
+#include <linux/of_platform.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_of.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
+
+#include "sprd_drm.h"
+
+#define DRIVER_NAME	"sprd"
+#define DRIVER_DESC	"Spreadtrum SoCs' DRM Driver"
+#define DRIVER_DATE	"20200201"
+#define DRIVER_MAJOR	1
+#define DRIVER_MINOR	0
+
+static const struct drm_mode_config_helper_funcs sprd_drm_mode_config_helper = {
+	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
+};
+
+static const struct drm_mode_config_funcs sprd_drm_mode_config_funcs = {
+	.fb_create = drm_gem_fb_create,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+};
+
+static void sprd_drm_mode_config_init(struct drm_device *drm)
+{
+	drm->mode_config.min_width = 0;
+	drm->mode_config.min_height = 0;
+	drm->mode_config.max_width = 8192;
+	drm->mode_config.max_height = 8192;
+	drm->mode_config.allow_fb_modifiers = true;
+
+	drm->mode_config.funcs = &sprd_drm_mode_config_funcs;
+	drm->mode_config.helper_private = &sprd_drm_mode_config_helper;
+}
+
+DEFINE_DRM_GEM_CMA_FOPS(sprd_drm_fops);
+
+static struct drm_driver sprd_drm_drv = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+	.fops			= &sprd_drm_fops,
+
+	/* GEM Operations */
+	DRM_GEM_CMA_DRIVER_OPS,
+
+	.name			= DRIVER_NAME,
+	.desc			= DRIVER_DESC,
+	.date			= DRIVER_DATE,
+	.major			= DRIVER_MAJOR,
+	.minor			= DRIVER_MINOR,
+};
+
+static int sprd_drm_bind(struct device *dev)
+{
+	struct drm_device *drm = dev_get_drvdata(dev);
+	int ret;
+
+	ret = drmm_mode_config_init(drm);
+	if (ret)
+		return ret;
+
+	sprd_drm_mode_config_init(drm);
+
+	/* bind and init sub drivers */
+	ret = component_bind_all(drm->dev, drm);
+	if (ret) {
+		drm_err(drm, "failed to bind all component.\n");
+		goto err_dc_cleanup;
+	}
+
+	/* vblank init */
+	ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
+	if (ret) {
+		drm_err(drm, "failed to initialize vblank.\n");
+		goto err_unbind_all;
+	}
+	/* with irq_enabled = true, we can use the vblank feature. */
+	drm->irq_enabled = true;
+
+	/* reset all the states of crtc/plane/encoder/connector */
+	drm_mode_config_reset(drm);
+
+	/* init kms poll for handling hpd */
+	drm_kms_helper_poll_init(drm);
+
+	ret = drm_dev_register(drm, 0);
+	if (ret < 0)
+		goto err_kms_helper_poll_fini;
+
+	return 0;
+
+err_kms_helper_poll_fini:
+	drm_kms_helper_poll_fini(drm);
+err_unbind_all:
+	component_unbind_all(drm->dev, drm);
+err_dc_cleanup:
+	drm_mode_config_cleanup(drm);
+	return ret;
+}
+
+static void sprd_drm_unbind(struct device *dev)
+{
+	struct drm_device *drm = dev_get_drvdata(dev);
+
+	drm_dev_unregister(drm);
+
+	drm_kms_helper_poll_fini(drm);
+
+	drm_mode_config_cleanup(drm);
+
+	component_unbind_all(drm->dev, drm);
+}
+
+static const struct component_master_ops drm_component_ops = {
+	.bind = sprd_drm_bind,
+	.unbind = sprd_drm_unbind,
+};
+
+static int compare_of(struct device *dev, void *data)
+{
+	return dev->of_node == data;
+}
+
+static int sprd_drm_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct drm_device *drm;
+	struct sprd_drm *sprd;
+	int ret;
+
+	sprd = devm_drm_dev_alloc(dev, &sprd_drm_drv, struct sprd_drm, drm);
+	if (IS_ERR(sprd))
+		return PTR_ERR(sprd);
+
+	drm = &sprd->drm;
+
+	ret = dma_set_mask_and_coherent(dev, ~0UL);
+	if (ret) {
+		drm_err(drm, "dma_set_mask_and_coherent failed (%d)\n", ret);
+		return ret;
+	}
+
+	platform_set_drvdata(pdev, drm);
+
+	return drm_of_component_probe(dev, compare_of, &drm_component_ops);
+}
+
+static int sprd_drm_remove(struct platform_device *pdev)
+{
+	component_master_del(&pdev->dev, &drm_component_ops);
+	return 0;
+}
+
+static void sprd_drm_shutdown(struct platform_device *pdev)
+{
+	struct drm_device *drm = platform_get_drvdata(pdev);
+
+	if (!drm) {
+		drm_warn(drm, "drm device is not available, no shutdown\n");
+		return;
+	}
+
+	drm_atomic_helper_shutdown(drm);
+}
+
+static const struct of_device_id drm_match_table[] = {
+	{ .compatible = "sprd,display-subsystem", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, drm_match_table);
+
+static struct platform_driver sprd_drm_driver = {
+	.probe = sprd_drm_probe,
+	.remove = sprd_drm_remove,
+	.shutdown = sprd_drm_shutdown,
+	.driver = {
+		.name = "sprd-drm-drv",
+		.of_match_table = drm_match_table,
+	},
+};
+
+static struct platform_driver *sprd_drm_drivers[]  = {
+	&sprd_drm_driver,
+};
+
+static int __init sprd_drm_init(void)
+{
+	int ret;
+
+	ret = platform_register_drivers(sprd_drm_drivers,
+					ARRAY_SIZE(sprd_drm_drivers));
+	return ret;
+}
+
+static void __exit sprd_drm_exit(void)
+{
+	platform_unregister_drivers(sprd_drm_drivers,
+				    ARRAY_SIZE(sprd_drm_drivers));
+}
+
+module_init(sprd_drm_init);
+module_exit(sprd_drm_exit);
+
+MODULE_AUTHOR("Leon He <leon.he@unisoc.com>");
+MODULE_AUTHOR("Kevin Tang <kevin.tang@unisoc.com>");
+MODULE_DESCRIPTION("Unisoc DRM KMS Master Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/sprd/sprd_drm.h b/drivers/gpu/drm/sprd/sprd_drm.h
new file mode 100644
index 0000000..9781fd5
--- /dev/null
+++ b/drivers/gpu/drm/sprd/sprd_drm.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#ifndef _SPRD_DRM_H_
+#define _SPRD_DRM_H_
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_print.h>
+
+struct sprd_drm {
+	struct drm_device drm;
+};
+
+#endif /* _SPRD_DRM_H_ */
-- 
2.7.4

_______________________________________________
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https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH RFC v7 3/6] dt-bindings: display: add Unisoc's dpu bindings

[Kevin Tang]

From: Kevin Tang <kevin.tang@unisoc.com>

DPU (Display Processor Unit) is the Display Controller for the Unisoc SoCs
which transfers the image data from a video memory buffer to an internal
LCD interface.

RFC v7:
  - Fix DTC unit name warnings
  - Fix the problem of maintainers

Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
---
 .../bindings/display/sprd/sprd,sharkl3-dpu.yaml    | 83 ++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dpu.yaml

diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dpu.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dpu.yaml
new file mode 100644
index 0000000..a9052e1
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dpu.yaml
@@ -0,0 +1,83 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/sprd/sprd,sharkl3-dpu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Unisoc Sharkl3 Display Processor Unit (DPU)
+
+maintainers:
+  - Kevin Tang <kevin.tang@unisoc.com>
+
+description: |
+  DPU (Display Processor Unit) is the Display Controller for the Unisoc SoCs
+  which transfers the image data from a video memory buffer to an internal
+  LCD interface.
+
+properties:
+  compatible:
+    const: sprd,sharkl3-dpu
+
+  reg:
+    maxItems: 1
+    description:
+      Physical base address and length of the DPU registers set
+
+  interrupts:
+    maxItems: 1
+    description:
+      The interrupt signal from DPU
+
+  clocks:
+    minItems: 2
+
+  clock-names:
+    items:
+      - const: clk_src_128m
+      - const: clk_src_384m
+
+  power-domains:
+    maxItems: 1
+    description: A phandle to DPU power domain node.
+
+  iommus:
+    maxItems: 1
+    description: A phandle to DPU iommu node.
+
+  port:
+    type: object
+    description:
+      A port node with endpoint definitions as defined in
+      Documentation/devicetree/bindings/media/video-interfaces.txt.
+      That port should be the output endpoint, usually output to
+      the associated DSI.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - port
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/sprd,sc9860-clk.h>
+    dpu: dpu@63000000 {
+        compatible = "sprd,sharkl3-dpu";
+        reg = <0x63000000 0x1000>;
+        interrupts = <GIC_SPI 46 IRQ_TYPE_LEVEL_HIGH>;
+        clock-names = "clk_src_128m", "clk_src_384m";
+
+        clocks = <&pll CLK_TWPLL_128M>,
+          <&pll CLK_TWPLL_384M>;
+
+        dpu_port: port {
+            dpu_out: endpoint {
+                remote-endpoint = <&dsi_in>;
+            };
+        };
+    };
-- 
2.7.4

[PATCH RFC v7 3/6] dt-bindings: display: add Unisoc's dpu bindings

[Kevin Tang]

From: Kevin Tang <kevin.tang@unisoc.com>

DPU (Display Processor Unit) is the Display Controller for the Unisoc SoCs
which transfers the image data from a video memory buffer to an internal
LCD interface.

RFC v7:
  - Fix DTC unit name warnings
  - Fix the problem of maintainers

Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
---
 .../bindings/display/sprd/sprd,sharkl3-dpu.yaml    | 83 ++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dpu.yaml

diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dpu.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dpu.yaml
new file mode 100644
index 0000000..a9052e1
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dpu.yaml
@@ -0,0 +1,83 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/sprd/sprd,sharkl3-dpu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Unisoc Sharkl3 Display Processor Unit (DPU)
+
+maintainers:
+  - Kevin Tang <kevin.tang@unisoc.com>
+
+description: |
+  DPU (Display Processor Unit) is the Display Controller for the Unisoc SoCs
+  which transfers the image data from a video memory buffer to an internal
+  LCD interface.
+
+properties:
+  compatible:
+    const: sprd,sharkl3-dpu
+
+  reg:
+    maxItems: 1
+    description:
+      Physical base address and length of the DPU registers set
+
+  interrupts:
+    maxItems: 1
+    description:
+      The interrupt signal from DPU
+
+  clocks:
+    minItems: 2
+
+  clock-names:
+    items:
+      - const: clk_src_128m
+      - const: clk_src_384m
+
+  power-domains:
+    maxItems: 1
+    description: A phandle to DPU power domain node.
+
+  iommus:
+    maxItems: 1
+    description: A phandle to DPU iommu node.
+
+  port:
+    type: object
+    description:
+      A port node with endpoint definitions as defined in
+      Documentation/devicetree/bindings/media/video-interfaces.txt.
+      That port should be the output endpoint, usually output to
+      the associated DSI.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - port
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/sprd,sc9860-clk.h>
+    dpu: dpu@63000000 {
+        compatible = "sprd,sharkl3-dpu";
+        reg = <0x63000000 0x1000>;
+        interrupts = <GIC_SPI 46 IRQ_TYPE_LEVEL_HIGH>;
+        clock-names = "clk_src_128m", "clk_src_384m";
+
+        clocks = <&pll CLK_TWPLL_128M>,
+          <&pll CLK_TWPLL_384M>;
+
+        dpu_port: port {
+            dpu_out: endpoint {
+                remote-endpoint = <&dsi_in>;
+            };
+        };
+    };
-- 
2.7.4

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[PATCH RFC v7 4/6] drm/sprd: add Unisoc's drm display controller driver

[Kevin Tang]

Adds DPU(Display Processor Unit) support for the Unisoc's display subsystem.
It's support multi planes, scaler, rotation, PQ(Picture Quality) and more.

RFC v7:
  - Remove plane_update stuff, dpu handles all the HW update in crtc->atomic_flush

RFC v6:
  - Access registers via readl/writel
  - Checking for unsupported KMS properties (format, rotation, blend_mode, etc) on plane_check ops
  - Remove always true checks for dpu core ops

Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
---
 drivers/gpu/drm/sprd/Kconfig    |   1 +
 drivers/gpu/drm/sprd/Makefile   |   6 +-
 drivers/gpu/drm/sprd/dpu_r2p0.c | 636 ++++++++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/sprd/sprd_dpu.c | 479 ++++++++++++++++++++++++++++++
 drivers/gpu/drm/sprd/sprd_dpu.h | 214 ++++++++++++++
 drivers/gpu/drm/sprd/sprd_drm.c |   1 +
 drivers/gpu/drm/sprd/sprd_drm.h |   2 +
 7 files changed, 1337 insertions(+), 2 deletions(-)
 create mode 100644 drivers/gpu/drm/sprd/dpu_r2p0.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_dpu.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_dpu.h

diff --git a/drivers/gpu/drm/sprd/Kconfig b/drivers/gpu/drm/sprd/Kconfig
index 6e80cc9..9b4ef9a 100644
--- a/drivers/gpu/drm/sprd/Kconfig
+++ b/drivers/gpu/drm/sprd/Kconfig
@@ -3,6 +3,7 @@ config DRM_SPRD
 	depends on ARCH_SPRD || COMPILE_TEST
 	depends on DRM && OF
 	select DRM_KMS_HELPER
+	select VIDEOMODE_HELPERS
 	select DRM_GEM_CMA_HELPER
 	select DRM_KMS_CMA_HELPER
 	select DRM_MIPI_DSI
diff --git a/drivers/gpu/drm/sprd/Makefile b/drivers/gpu/drm/sprd/Makefile
index 86d95d9..0ba48f2 100644
--- a/drivers/gpu/drm/sprd/Makefile
+++ b/drivers/gpu/drm/sprd/Makefile
@@ -1,5 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 
-subdir-ccflags-y += -I$(srctree)/$(src)
+obj-y := sprd_drm.o \
+	sprd_dpu.o
+
+obj-y += dpu_r2p0.o
 
-obj-y := sprd_drm.o
diff --git a/drivers/gpu/drm/sprd/dpu_r2p0.c b/drivers/gpu/drm/sprd/dpu_r2p0.c
new file mode 100644
index 0000000..1f2f654
--- /dev/null
+++ b/drivers/gpu/drm/sprd/dpu_r2p0.c
@@ -0,0 +1,636 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/wait.h>
+#include <linux/workqueue.h>
+
+#include "sprd_dpu.h"
+
+/* Global control registers */
+#define REG_DPU_CTRL	0x04
+#define REG_DPU_CFG0	0x08
+#define REG_DPU_CFG1	0x0C
+#define REG_DPU_CFG2	0x10
+#define REG_PANEL_SIZE	0x20
+#define REG_BLEND_SIZE	0x24
+#define REG_BG_COLOR	0x2C
+
+/* Layer0 control registers */
+#define REG_LAY_BASE_ADDR0	0x30
+#define REG_LAY_BASE_ADDR1	0x34
+#define REG_LAY_BASE_ADDR2	0x38
+#define REG_LAY_CTRL		0x40
+#define REG_LAY_SIZE		0x44
+#define REG_LAY_PITCH		0x48
+#define REG_LAY_POS		0x4C
+#define REG_LAY_ALPHA		0x50
+#define REG_LAY_PALLETE		0x58
+#define REG_LAY_CROP_START	0x5C
+
+/* Interrupt control registers */
+#define REG_DPU_INT_EN		0x1E0
+#define REG_DPU_INT_CLR		0x1E4
+#define REG_DPU_INT_STS		0x1E8
+
+/* DPI control registers */
+#define REG_DPI_CTRL		0x1F0
+#define REG_DPI_H_TIMING	0x1F4
+#define REG_DPI_V_TIMING	0x1F8
+
+/* MMU control registers */
+#define REG_MMU_EN			0x800
+#define REG_MMU_VPN_RANGE		0x80C
+#define REG_MMU_VAOR_ADDR_RD		0x818
+#define REG_MMU_VAOR_ADDR_WR		0x81C
+#define REG_MMU_INV_ADDR_RD		0x820
+#define REG_MMU_INV_ADDR_WR		0x824
+#define REG_MMU_PPN1			0x83C
+#define REG_MMU_RANGE1			0x840
+#define REG_MMU_PPN2			0x844
+#define REG_MMU_RANGE2			0x848
+
+/* Global control bits */
+#define BIT_DPU_RUN			BIT(0)
+#define BIT_DPU_STOP			BIT(1)
+#define BIT_DPU_REG_UPDATE		BIT(2)
+#define BIT_DPU_IF_EDPI			BIT(0)
+#define BIT_DPU_COEF_NARROW_RANGE		BIT(4)
+#define BIT_DPU_Y2R_COEF_ITU709_STANDARD	BIT(5)
+
+/* Layer control bits */
+#define BIT_DPU_LAY_EN				BIT(0)
+#define BIT_DPU_LAY_LAYER_ALPHA			(0x01 << 2)
+#define BIT_DPU_LAY_COMBO_ALPHA			(0x02 << 2)
+#define BIT_DPU_LAY_FORMAT_YUV422_2PLANE		(0x00 << 4)
+#define BIT_DPU_LAY_FORMAT_YUV420_2PLANE		(0x01 << 4)
+#define BIT_DPU_LAY_FORMAT_YUV420_3PLANE		(0x02 << 4)
+#define BIT_DPU_LAY_FORMAT_ARGB8888			(0x03 << 4)
+#define BIT_DPU_LAY_FORMAT_RGB565			(0x04 << 4)
+#define BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3		(0x00 << 8)
+#define BIT_DPU_LAY_DATA_ENDIAN_B3B2B1B0		(0x01 << 8)
+#define BIT_DPU_LAY_NO_SWITCH			(0x00 << 10)
+#define BIT_DPU_LAY_RB_OR_UV_SWITCH		(0x01 << 10)
+#define BIT_DPU_LAY_MODE_BLEND_NORMAL		(0x00 << 16)
+#define BIT_DPU_LAY_MODE_BLEND_PREMULT		(0x01 << 16)
+
+/* Interrupt control & status bits */
+#define BIT_DPU_INT_DONE		BIT(0)
+#define BIT_DPU_INT_TE			BIT(1)
+#define BIT_DPU_INT_ERR			BIT(2)
+#define BIT_DPU_INT_UPDATE_DONE		BIT(4)
+#define BIT_DPU_INT_VSYNC		BIT(5)
+#define BIT_DPU_INT_FBC_PLD_ERR		BIT(8)
+#define BIT_DPU_INT_FBC_HDR_ERR		BIT(9)
+#define BIT_DPU_INT_MMU_VAOR_RD		BIT(16)
+#define BIT_DPU_INT_MMU_VAOR_WR		BIT(17)
+#define BIT_DPU_INT_MMU_INV_RD		BIT(18)
+#define BIT_DPU_INT_MMU_INV_WR		BIT(19)
+
+/* DPI control bits */
+#define BIT_DPU_EDPI_TE_EN		BIT(8)
+#define BIT_DPU_EDPI_FROM_EXTERNAL_PAD	BIT(10)
+#define BIT_DPU_DPI_HALT_EN		BIT(16)
+
+static u32 check_mmu_isr(struct dpu_context *ctx, u32 reg_val)
+{
+	u32 mmu_mask = BIT_DPU_INT_MMU_VAOR_RD |
+			BIT_DPU_INT_MMU_VAOR_WR |
+			BIT_DPU_INT_MMU_INV_RD |
+			BIT_DPU_INT_MMU_INV_WR;
+	u32 val = reg_val & mmu_mask;
+	int i;
+
+	if (val) {
+		DRM_ERROR("--- iommu interrupt err: 0x%04x ---\n", val);
+
+		if (val & BIT_DPU_INT_MMU_INV_RD)
+			DRM_ERROR("iommu invalid read error, addr: 0x%08x\n",
+				readl_relaxed(ctx->base + REG_MMU_INV_ADDR_RD));
+		if (val & BIT_DPU_INT_MMU_INV_WR)
+			DRM_ERROR("iommu invalid write error, addr: 0x%08x\n",
+				readl_relaxed(ctx->base + REG_MMU_INV_ADDR_WR));
+		if (val & BIT_DPU_INT_MMU_VAOR_RD)
+			DRM_ERROR("iommu va out of range read error, addr: 0x%08x\n",
+				readl_relaxed(ctx->base + REG_MMU_VAOR_ADDR_RD));
+		if (val & BIT_DPU_INT_MMU_VAOR_WR)
+			DRM_ERROR("iommu va out of range write error, addr: 0x%08x\n",
+				readl_relaxed(ctx->base + REG_MMU_VAOR_ADDR_WR));
+
+		for (i = 0; i < 8; i++) {
+			reg_val = layer_reg_rd(ctx, REG_LAY_CTRL, i);
+			if (reg_val & 0x1)
+				DRM_INFO("layer%d: 0x%08x 0x%08x 0x%08x ctrl: 0x%08x\n", i,
+					layer_reg_rd(ctx, REG_LAY_BASE_ADDR0, i),
+					layer_reg_rd(ctx, REG_LAY_BASE_ADDR1, i),
+					layer_reg_rd(ctx, REG_LAY_BASE_ADDR2, i),
+					layer_reg_rd(ctx, REG_LAY_CTRL, i));
+		}
+	}
+
+	return val;
+}
+
+static int dpu_img_ctrl(struct dpu_layer *layer, u32 format, u32 angle, u32 blend)
+{
+	switch (format) {
+	case DRM_FORMAT_BGRA8888:
+		/* BGRA8888 -> ARGB8888 */
+		layer->format |= BIT_DPU_LAY_DATA_ENDIAN_B3B2B1B0;
+		layer->format |= BIT_DPU_LAY_FORMAT_ARGB8888;
+		break;
+	case DRM_FORMAT_RGBX8888:
+	case DRM_FORMAT_RGBA8888:
+		/* RGBA8888 -> ABGR8888 */
+		layer->format |= BIT_DPU_LAY_DATA_ENDIAN_B3B2B1B0;
+		/* FALLTHRU */
+	case DRM_FORMAT_ABGR8888:
+		/* RB switch */
+		layer->format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
+		/* FALLTHRU */
+	case DRM_FORMAT_ARGB8888:
+		layer->format |= BIT_DPU_LAY_FORMAT_ARGB8888;
+		break;
+	case DRM_FORMAT_XBGR8888:
+		/* RB switch */
+		layer->format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
+		/* FALLTHRU */
+	case DRM_FORMAT_XRGB8888:
+		layer->format |= BIT_DPU_LAY_FORMAT_ARGB8888;
+		break;
+	case DRM_FORMAT_BGR565:
+		/* RB switch */
+		layer->format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
+		/* FALLTHRU */
+	case DRM_FORMAT_RGB565:
+		layer->format |= BIT_DPU_LAY_FORMAT_RGB565;
+		break;
+	case DRM_FORMAT_NV12:
+		/* 2-Lane: Yuv420 */
+		layer->format |= BIT_DPU_LAY_FORMAT_YUV420_2PLANE;
+		/* Y endian */
+		layer->format |= BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3;
+		/* UV endian */
+		layer->format |= BIT_DPU_LAY_NO_SWITCH;
+		break;
+	case DRM_FORMAT_NV21:
+		/* 2-Lane: Yuv420 */
+		layer->format |= BIT_DPU_LAY_FORMAT_YUV420_2PLANE;
+		/* Y endian */
+		layer->format |= BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3;
+		/* UV endian */
+		layer->format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
+		break;
+	case DRM_FORMAT_NV16:
+		/* 2-Lane: Yuv422 */
+		layer->format |= BIT_DPU_LAY_FORMAT_YUV422_2PLANE;
+		/* Y endian */
+		layer->format |= BIT_DPU_LAY_DATA_ENDIAN_B3B2B1B0;
+		/* UV endian */
+		layer->format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
+		break;
+	case DRM_FORMAT_NV61:
+		/* 2-Lane: Yuv422 */
+		layer->format |= BIT_DPU_LAY_FORMAT_YUV422_2PLANE;
+		/* Y endian */
+		layer->format |= BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3;
+		/* UV endian */
+		layer->format |= BIT_DPU_LAY_NO_SWITCH;
+		break;
+	case DRM_FORMAT_YUV420:
+		layer->format |= BIT_DPU_LAY_FORMAT_YUV420_3PLANE;
+		/* Y endian */
+		layer->format |= BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3;
+		/* UV endian */
+		layer->format |= BIT_DPU_LAY_NO_SWITCH;
+		break;
+	case DRM_FORMAT_YVU420:
+		layer->format |= BIT_DPU_LAY_FORMAT_YUV420_3PLANE;
+		/* Y endian */
+		layer->format |= BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3;
+		/* UV endian */
+		layer->format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
+		break;
+	default:
+		DRM_ERROR("invalid format %c%c%c%c\n", format,
+						format >> 8,
+						format >> 16,
+						format >> 24);
+		return -EINVAL;
+	}
+
+	switch (angle) {
+	case DRM_MODE_ROTATE_0:
+		layer->rotation = DPU_LAYER_ROTATION_0;
+		break;
+	case DRM_MODE_ROTATE_90:
+		layer->rotation = DPU_LAYER_ROTATION_90;
+		break;
+	case DRM_MODE_ROTATE_180:
+		layer->rotation = DPU_LAYER_ROTATION_180;
+		break;
+	case DRM_MODE_ROTATE_270:
+		layer->rotation = DPU_LAYER_ROTATION_270;
+		break;
+	case DRM_MODE_REFLECT_Y:
+		layer->rotation = DPU_LAYER_ROTATION_180_M;
+		break;
+	case (DRM_MODE_REFLECT_Y | DRM_MODE_ROTATE_90):
+		layer->rotation = DPU_LAYER_ROTATION_90_M;
+		break;
+	case DRM_MODE_REFLECT_X:
+		layer->rotation = DPU_LAYER_ROTATION_0_M;
+		break;
+	case (DRM_MODE_REFLECT_X | DRM_MODE_ROTATE_90):
+		layer->rotation = DPU_LAYER_ROTATION_270_M;
+		break;
+	default:
+		DRM_ERROR("rotation convert unsupport angle (drm)= 0x%x\n", angle);
+		return -EINVAL;
+	}
+
+	switch (blend) {
+	case DRM_MODE_BLEND_COVERAGE:
+		/* alpha mode select - combo alpha */
+		layer->blending |= BIT_DPU_LAY_COMBO_ALPHA;
+		/* Normal mode */
+		layer->blending |= BIT_DPU_LAY_MODE_BLEND_NORMAL;
+		break;
+	case DRM_MODE_BLEND_PREMULTI:
+		/* alpha mode select - combo alpha */
+		layer->blending |= BIT_DPU_LAY_COMBO_ALPHA;
+		/* Pre-mult mode */
+		layer->blending |= BIT_DPU_LAY_MODE_BLEND_PREMULT;
+		break;
+	case DRM_MODE_BLEND_PIXEL_NONE:
+	default:
+		/* don't do blending, maybe RGBX */
+		/* alpha mode select - layer alpha */
+		layer->blending |= BIT_DPU_LAY_LAYER_ALPHA;
+		break;
+	}
+
+	return 0;
+}
+
+static void dpu_clean_all(struct dpu_context *ctx)
+{
+	int i;
+
+	for (i = 0; i < 8; i++)
+		layer_reg_wr(ctx, REG_LAY_CTRL, 0x00, i);
+}
+
+static u32 dpu_isr(struct dpu_context *ctx)
+{
+	u32 reg_val, int_mask = 0;
+
+	reg_val = readl_relaxed(ctx->base + REG_DPU_INT_STS);
+
+	/* disable err interrupt */
+	if (reg_val & BIT_DPU_INT_ERR)
+		int_mask |= BIT_DPU_INT_ERR;
+
+	/* dpu update done isr */
+	if (reg_val & BIT_DPU_INT_UPDATE_DONE) {
+		ctx->evt_update = true;
+		wake_up_interruptible_all(&ctx->wait_queue);
+	}
+
+	/* dpu stop done isr */
+	if (reg_val & BIT_DPU_INT_DONE) {
+		ctx->evt_stop = true;
+		wake_up_interruptible_all(&ctx->wait_queue);
+	}
+
+	/* dpu ifbc payload error isr */
+	if (reg_val & BIT_DPU_INT_FBC_PLD_ERR) {
+		int_mask |= BIT_DPU_INT_FBC_PLD_ERR;
+		DRM_ERROR("dpu ifbc payload error\n");
+	}
+
+	/* dpu ifbc header error isr */
+	if (reg_val & BIT_DPU_INT_FBC_HDR_ERR) {
+		int_mask |= BIT_DPU_INT_FBC_HDR_ERR;
+		DRM_ERROR("dpu ifbc header error\n");
+	}
+
+	int_mask |= check_mmu_isr(ctx, reg_val);
+
+	writel_relaxed(reg_val, ctx->base + REG_DPU_INT_CLR);
+	dpu_reg_clr(ctx, REG_DPU_INT_EN, int_mask);
+
+	return reg_val;
+}
+
+static int dpu_wait_stop_done(struct dpu_context *ctx)
+{
+	int rc;
+
+	if (ctx->stopped)
+		return 0;
+
+	rc = wait_event_interruptible_timeout(ctx->wait_queue, ctx->evt_stop,
+					       msecs_to_jiffies(500));
+	ctx->evt_stop = false;
+
+	ctx->stopped = true;
+
+	if (!rc) {
+		DRM_ERROR("dpu wait for stop done time out!\n");
+		return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+static int dpu_wait_update_done(struct dpu_context *ctx)
+{
+	int rc;
+
+	ctx->evt_update = false;
+
+	rc = wait_event_interruptible_timeout(ctx->wait_queue, ctx->evt_update,
+					       msecs_to_jiffies(500));
+
+	if (!rc) {
+		DRM_ERROR("dpu wait for reg update done time out!\n");
+		return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+static void dpu_stop(struct dpu_context *ctx)
+{
+	if (ctx->if_type == SPRD_DPU_IF_DPI)
+		dpu_reg_set(ctx, REG_DPU_CTRL, BIT_DPU_STOP);
+
+	dpu_wait_stop_done(ctx);
+}
+
+static void dpu_run(struct dpu_context *ctx)
+{
+	dpu_reg_set(ctx, REG_DPU_CTRL, BIT_DPU_RUN);
+
+	ctx->stopped = false;
+}
+
+static void dpu_init(struct dpu_context *ctx)
+{
+	u32 reg_val, size;
+
+	writel_relaxed(0x00, ctx->base + REG_BG_COLOR);
+
+	size = (ctx->vm.vactive << 16) | ctx->vm.hactive;
+
+	writel_relaxed(size, ctx->base + REG_PANEL_SIZE);
+	writel_relaxed(size, ctx->base + REG_BLEND_SIZE);
+
+	reg_val = BIT_DPU_COEF_NARROW_RANGE | BIT_DPU_Y2R_COEF_ITU709_STANDARD;
+	writel_relaxed(reg_val, ctx->base + REG_DPU_CFG0);
+	writel_relaxed(0x004466da, ctx->base + REG_DPU_CFG1);
+	writel_relaxed(0x00, ctx->base + REG_DPU_CFG2);
+
+	if (ctx->stopped)
+		dpu_clean_all(ctx);
+
+	writel_relaxed(0x00, ctx->base + REG_MMU_EN);
+	writel_relaxed(0x00, ctx->base + REG_MMU_PPN1);
+	writel_relaxed(0xffff, ctx->base + REG_MMU_RANGE1);
+	writel_relaxed(0x00, ctx->base + REG_MMU_PPN2);
+	writel_relaxed(0xffff, ctx->base + REG_MMU_RANGE2);
+	writel_relaxed(0x1ffff, ctx->base + REG_MMU_VPN_RANGE);
+
+	writel_relaxed(0xffff, ctx->base + REG_DPU_INT_CLR);
+}
+
+static void dpu_fini(struct dpu_context *ctx)
+{
+	writel_relaxed(0x00, ctx->base + REG_DPU_INT_EN);
+	writel_relaxed(0xff, ctx->base + REG_DPU_INT_CLR);
+}
+
+static void dpu_layer(struct dpu_context *ctx, struct dpu_layer *hwlayer)
+{
+	const struct drm_format_info *info;
+	u32 size, offset, ctrl, pitch;
+	int i;
+
+	offset = (hwlayer->dst_x & 0xffff) | ((hwlayer->dst_y) << 16);
+
+	if (hwlayer->src_w && hwlayer->src_h)
+		size = (hwlayer->src_w & 0xffff) | ((hwlayer->src_h) << 16);
+	else
+		size = (hwlayer->dst_w & 0xffff) | ((hwlayer->dst_h) << 16);
+
+	for (i = 0; i < hwlayer->planes; i++)
+		layer_reg_wr(ctx, REG_LAY_BASE_ADDR0, hwlayer->addr[i], hwlayer->index);
+
+	layer_reg_wr(ctx, REG_LAY_POS, offset, hwlayer->index);
+	layer_reg_wr(ctx, REG_LAY_SIZE, size, hwlayer->index);
+	layer_reg_wr(ctx, REG_LAY_CROP_START,
+			hwlayer->src_y << 16 | hwlayer->src_x, hwlayer->index);
+	layer_reg_wr(ctx, REG_LAY_ALPHA, hwlayer->alpha, hwlayer->index);
+
+	info = drm_format_info(hwlayer->format);
+	if (hwlayer->planes == 3) {
+		/* UV pitch is 1/2 of Y pitch*/
+		pitch = (hwlayer->pitch[0] / info->cpp[0]) |
+				(hwlayer->pitch[0] / info->cpp[0] << 15);
+		layer_reg_wr(ctx, REG_LAY_PITCH, pitch, hwlayer->index);
+	} else {
+		pitch = hwlayer->pitch[0] / info->cpp[0];
+		layer_reg_wr(ctx, REG_LAY_PITCH, pitch, hwlayer->index);
+	}
+
+	ctrl = hwlayer->format |
+		hwlayer->blending |
+		(hwlayer->rotation & 0x7) << 20;
+
+	layer_reg_wr(ctx, REG_LAY_CTRL, ctrl, hwlayer->index);
+	layer_reg_wr(ctx, REG_LAY_CTRL, BIT_DPU_LAY_EN, hwlayer->index);
+
+	DRM_DEBUG("dst_x = %d, dst_y = %d, dst_w = %d, dst_h = %d\n",
+				hwlayer->dst_x, hwlayer->dst_y,
+				hwlayer->dst_w, hwlayer->dst_h);
+	DRM_DEBUG("start_x = %d, start_y = %d, start_w = %d, start_h = %d\n",
+				hwlayer->src_x, hwlayer->src_y,
+				hwlayer->src_w, hwlayer->src_h);
+}
+
+static void dpu_flip(struct dpu_context *ctx,
+		     struct dpu_layer layers[], u8 count)
+{
+	int i;
+	u32 reg_val;
+
+	/*
+	 * Make sure the dpu is in stop status. DPU_R2P0 has no shadow
+	 * registers in EDPI mode. So the config registers can only be
+	 * updated in the rising edge of DPU_RUN bit.
+	 */
+	if (ctx->if_type == SPRD_DPU_IF_EDPI)
+		dpu_wait_stop_done(ctx);
+
+	/* reset the bgcolor to black */
+	writel_relaxed(0x00, ctx->base + REG_BG_COLOR);
+
+	/* disable all the layers */
+	dpu_clean_all(ctx);
+
+	/* start configure dpu layers */
+	for (i = 0; i < count; i++)
+		dpu_layer(ctx, &layers[i]);
+
+	/* update trigger and wait */
+	if (ctx->if_type == SPRD_DPU_IF_DPI) {
+		if (!ctx->stopped) {
+			dpu_reg_set(ctx, REG_DPU_CTRL, BIT_DPU_REG_UPDATE);
+			dpu_wait_update_done(ctx);
+		}
+
+		dpu_reg_set(ctx, REG_DPU_INT_EN, BIT_DPU_INT_ERR);
+	} else if (ctx->if_type == SPRD_DPU_IF_EDPI) {
+		dpu_reg_set(ctx, REG_DPU_CTRL, BIT_DPU_RUN);
+
+		ctx->stopped = false;
+	}
+
+	/*
+	 * If the following interrupt was disabled in isr,
+	 * re-enable it.
+	 */
+	reg_val = BIT_DPU_INT_FBC_PLD_ERR |
+		  BIT_DPU_INT_FBC_HDR_ERR |
+		  BIT_DPU_INT_MMU_VAOR_RD |
+		  BIT_DPU_INT_MMU_VAOR_WR |
+		  BIT_DPU_INT_MMU_INV_RD |
+		  BIT_DPU_INT_MMU_INV_WR;
+	dpu_reg_set(ctx, REG_DPU_INT_EN, reg_val);
+
+}
+
+static void dpu_dpi_init(struct dpu_context *ctx)
+{
+	u32 int_mask = 0;
+	u32 reg_val;
+
+	if (ctx->if_type == SPRD_DPU_IF_DPI) {
+		/* use dpi as interface */
+		dpu_reg_clr(ctx, REG_DPU_CFG0, BIT_DPU_IF_EDPI);
+
+		/* disable Halt function for SPRD DSI */
+		dpu_reg_clr(ctx, REG_DPI_CTRL, BIT_DPU_DPI_HALT_EN);
+
+		/* select te from external pad */
+		dpu_reg_set(ctx, REG_DPI_CTRL, BIT_DPU_EDPI_FROM_EXTERNAL_PAD);
+
+		/* set dpi timing */
+		reg_val = ctx->vm.hsync_len << 0 |
+			  ctx->vm.hback_porch << 8 |
+			  ctx->vm.hfront_porch << 20;
+		writel_relaxed(reg_val, ctx->base + REG_DPI_H_TIMING);
+
+		reg_val = ctx->vm.vsync_len << 0 |
+			  ctx->vm.vback_porch << 8 |
+			  ctx->vm.vfront_porch << 20;
+		writel_relaxed(reg_val, ctx->base + REG_DPI_V_TIMING);
+
+		if (ctx->vm.vsync_len + ctx->vm.vback_porch < 32)
+			DRM_WARN("Warning: (vsync + vbp) < 32, "
+				"underflow risk!\n");
+
+		/* enable dpu update done INT */
+		int_mask |= BIT_DPU_INT_UPDATE_DONE;
+		/* enable dpu DONE  INT */
+		int_mask |= BIT_DPU_INT_DONE;
+		/* enable dpu dpi vsync */
+		int_mask |= BIT_DPU_INT_VSYNC;
+		/* enable dpu TE INT */
+		int_mask |= BIT_DPU_INT_TE;
+		/* enable underflow err INT */
+		int_mask |= BIT_DPU_INT_ERR;
+	} else if (ctx->if_type == SPRD_DPU_IF_EDPI) {
+		/* use edpi as interface */
+		dpu_reg_set(ctx, REG_DPU_CFG0, BIT_DPU_IF_EDPI);
+
+		/* use external te */
+		dpu_reg_set(ctx, REG_DPI_CTRL, BIT_DPU_EDPI_FROM_EXTERNAL_PAD);
+
+		/* enable te */
+		dpu_reg_set(ctx, REG_DPI_CTRL, BIT_DPU_EDPI_TE_EN);
+
+		/* enable stop DONE INT */
+		int_mask |= BIT_DPU_INT_DONE;
+		/* enable TE INT */
+		int_mask |= BIT_DPU_INT_TE;
+	}
+
+	/* enable ifbc payload error INT */
+	int_mask |= BIT_DPU_INT_FBC_PLD_ERR;
+	/* enable ifbc header error INT */
+	int_mask |= BIT_DPU_INT_FBC_HDR_ERR;
+	/* enable iommu va out of range read error INT */
+	int_mask |= BIT_DPU_INT_MMU_VAOR_RD;
+	/* enable iommu va out of range write error INT */
+	int_mask |= BIT_DPU_INT_MMU_VAOR_WR;
+	/* enable iommu invalid read error INT */
+	int_mask |= BIT_DPU_INT_MMU_INV_RD;
+	/* enable iommu invalid write error INT */
+	int_mask |= BIT_DPU_INT_MMU_INV_WR;
+
+	writel_relaxed(int_mask, ctx->base + REG_DPU_INT_EN);
+}
+
+static void enable_vsync(struct dpu_context *ctx)
+{
+	dpu_reg_set(ctx, REG_DPU_INT_EN, BIT_DPU_INT_VSYNC);
+}
+
+static void disable_vsync(struct dpu_context *ctx)
+{
+	dpu_reg_clr(ctx, REG_DPU_INT_EN, BIT_DPU_INT_VSYNC);
+}
+
+static const u32 primary_fmts[] = {
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_ABGR8888,
+	DRM_FORMAT_RGBA8888,
+	DRM_FORMAT_BGRA8888,
+	DRM_FORMAT_RGBX8888,
+	DRM_FORMAT_RGB565,
+	DRM_FORMAT_BGR565,
+	DRM_FORMAT_NV12,
+	DRM_FORMAT_NV21,
+	DRM_FORMAT_NV16,
+	DRM_FORMAT_NV61,
+	DRM_FORMAT_YUV420,
+	DRM_FORMAT_YVU420,
+};
+
+static void dpu_capability(struct dpu_context *ctx, struct dpu_capability *cap)
+{
+	cap->max_layers = 6;
+	cap->fmts_ptr = primary_fmts;
+	cap->fmts_cnt = ARRAY_SIZE(primary_fmts);
+}
+
+const struct dpu_core_ops dpu_r2p0_core_ops = {
+	.init = dpu_init,
+	.fini = dpu_fini,
+	.run = dpu_run,
+	.stop = dpu_stop,
+	.isr = dpu_isr,
+	.ifconfig = dpu_dpi_init,
+	.capability = dpu_capability,
+	.img_ctrl = dpu_img_ctrl,
+	.flip = dpu_flip,
+	.enable_vsync = enable_vsync,
+	.disable_vsync = disable_vsync,
+};
diff --git a/drivers/gpu/drm/sprd/sprd_dpu.c b/drivers/gpu/drm/sprd/sprd_dpu.c
new file mode 100644
index 0000000..f6aa47b
--- /dev/null
+++ b/drivers/gpu/drm/sprd/sprd_dpu.c
@@ -0,0 +1,479 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#include <linux/component.h>
+#include <linux/dma-buf.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_plane_helper.h>
+
+#include "sprd_drm.h"
+#include "sprd_dpu.h"
+
+struct sprd_plane {
+	struct drm_plane plane;
+	u32 index;
+};
+
+static void sprd_dpu_init(struct sprd_dpu *dpu);
+static void sprd_dpu_fini(struct sprd_dpu *dpu);
+
+static inline struct sprd_plane *to_sprd_plane(struct drm_plane *plane)
+{
+	return container_of(plane, struct sprd_plane, plane);
+}
+
+static int sprd_plane_atomic_check(struct drm_plane *plane,
+				  struct drm_plane_state *state)
+{
+	struct sprd_plane *p = to_sprd_plane(plane);
+	struct sprd_dpu *dpu = crtc_to_dpu(plane->state->crtc);
+	struct dpu_layer *layer = &dpu->layers[p->index];
+	struct drm_framebuffer *fb = state->fb;
+	struct drm_gem_cma_object *cma_obj;
+	int i, ret;
+	u32 addr;
+
+	if (!state->fb || !state->crtc)
+		return 0;
+
+	ret = dpu->core->img_ctrl(layer, fb->format->format, state->rotation,
+			state->pixel_blend_mode);
+	if (ret < 0)
+		return ret;
+
+	layer->index = p->index;
+	layer->src_x = state->src_x >> 16;
+	layer->src_y = state->src_y >> 16;
+	layer->src_w = state->src_w >> 16;
+	layer->src_h = state->src_h >> 16;
+	layer->dst_x = state->crtc_x;
+	layer->dst_y = state->crtc_y;
+	layer->dst_w = state->crtc_w;
+	layer->dst_h = state->crtc_h;
+	layer->alpha = state->alpha;
+	layer->planes = fb->format->num_planes;
+
+	for (i = 0; i < fb->format->num_planes; i++) {
+		cma_obj = drm_fb_cma_get_gem_obj(fb, i);
+		addr = cma_obj->paddr + fb->offsets[i];
+		if (addr % 16) {
+			DRM_ERROR("layer addr[%d] is not 16 bytes align, it's 0x%08x\n",
+				i, addr);
+			return -EFAULT;
+		}
+
+		layer->addr[i] = addr;
+		layer->pitch[i] = fb->pitches[i];
+	}
+
+	dpu->pending_planes++;
+
+	return 0;
+}
+
+/* plane doesn't represent a real HW, so there is no HW update for plane.
+ * dpu handles all the HW update in crtc->atomic_flush
+ */
+static void sprd_plane_atomic_update(struct drm_plane *plane,
+				    struct drm_plane_state *old_state)
+{
+	DRM_DEBUG("%s()\n", __func__);
+}
+
+static void sprd_plane_create_properties(struct sprd_plane *p, int index)
+{
+	unsigned int supported_modes = BIT(DRM_MODE_BLEND_PIXEL_NONE) |
+				       BIT(DRM_MODE_BLEND_PREMULTI) |
+				       BIT(DRM_MODE_BLEND_COVERAGE);
+
+	/* create rotation property */
+	drm_plane_create_rotation_property(&p->plane,
+					   DRM_MODE_ROTATE_0,
+					   DRM_MODE_ROTATE_MASK |
+					   DRM_MODE_REFLECT_MASK);
+
+	/* create alpha property */
+	drm_plane_create_alpha_property(&p->plane);
+
+	/* create blend mode property */
+	drm_plane_create_blend_mode_property(&p->plane, supported_modes);
+
+	/* create zpos property */
+	drm_plane_create_zpos_immutable_property(&p->plane, index);
+}
+
+static const struct drm_plane_helper_funcs sprd_plane_helper_funcs = {
+	.atomic_check = sprd_plane_atomic_check,
+	.atomic_update = sprd_plane_atomic_update,
+};
+
+static const struct drm_plane_funcs sprd_plane_funcs = {
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane	= drm_atomic_helper_disable_plane,
+	.destroy = drm_plane_cleanup,
+	.reset = drm_atomic_helper_plane_reset,
+	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+};
+
+static struct drm_plane *sprd_plane_init(struct drm_device *drm,
+					struct sprd_dpu *dpu)
+{
+	struct drm_plane *primary = NULL;
+	struct sprd_plane *p = NULL;
+	struct dpu_capability cap = {};
+	int ret, i;
+
+	dpu->core->capability(&dpu->ctx, &cap);
+
+	dpu->layers = devm_kcalloc(drm->dev, cap.max_layers,
+				  sizeof(struct dpu_layer), GFP_KERNEL);
+	if (!dpu->layers)
+		return ERR_PTR(-ENOMEM);
+
+	for (i = 0; i < cap.max_layers; i++) {
+
+		p = devm_kzalloc(drm->dev, sizeof(*p), GFP_KERNEL);
+		if (!p)
+			return ERR_PTR(-ENOMEM);
+
+		ret = drm_universal_plane_init(drm, &p->plane, 1,
+					       &sprd_plane_funcs, cap.fmts_ptr,
+					       cap.fmts_cnt, NULL,
+					       DRM_PLANE_TYPE_PRIMARY, NULL);
+		if (ret) {
+			DRM_ERROR("fail to init primary plane\n");
+			return ERR_PTR(ret);
+		}
+
+		drm_plane_helper_add(&p->plane, &sprd_plane_helper_funcs);
+
+		sprd_plane_create_properties(p, i);
+
+		p->index = i;
+		if (i == 0)
+			primary = &p->plane;
+	}
+
+	return primary;
+}
+
+static enum drm_mode_status sprd_crtc_mode_valid(struct drm_crtc *crtc,
+					const struct drm_display_mode *mode)
+{
+	struct sprd_dpu *dpu = crtc_to_dpu(crtc);
+
+	DRM_DEBUG("%s() mode: "DRM_MODE_FMT"\n", __func__, DRM_MODE_ARG(mode));
+
+	if (mode->type & DRM_MODE_TYPE_PREFERRED) {
+		drm_display_mode_to_videomode(mode, &dpu->ctx.vm);
+
+		if ((mode->hdisplay == mode->htotal) ||
+		    (mode->vdisplay == mode->vtotal))
+			dpu->ctx.if_type = SPRD_DPU_IF_EDPI;
+		else
+			dpu->ctx.if_type = SPRD_DPU_IF_DPI;
+	}
+
+	return MODE_OK;
+}
+
+static void sprd_crtc_atomic_enable(struct drm_crtc *crtc,
+				   struct drm_crtc_state *old_state)
+{
+	struct sprd_dpu *dpu = crtc_to_dpu(crtc);
+
+	sprd_dpu_init(dpu);
+
+	enable_irq(dpu->ctx.irq);
+}
+
+static void sprd_crtc_atomic_disable(struct drm_crtc *crtc,
+				    struct drm_crtc_state *old_state)
+{
+	struct sprd_dpu *dpu = crtc_to_dpu(crtc);
+	struct drm_device *drm = dpu->crtc.dev;
+
+	disable_irq(dpu->ctx.irq);
+
+	sprd_dpu_fini(dpu);
+
+	spin_lock_irq(&drm->event_lock);
+	if (crtc->state->event) {
+		drm_crtc_send_vblank_event(crtc, crtc->state->event);
+		crtc->state->event = NULL;
+	}
+	spin_unlock_irq(&drm->event_lock);
+}
+
+static int sprd_crtc_atomic_check(struct drm_crtc *crtc,
+				 struct drm_crtc_state *state)
+{
+	DRM_DEBUG("%s()\n", __func__);
+
+	return 0;
+}
+
+static void sprd_crtc_atomic_begin(struct drm_crtc *crtc,
+				  struct drm_crtc_state *old_state)
+{
+	struct sprd_dpu *dpu = crtc_to_dpu(crtc);
+
+	memset(dpu->layers, 0, sizeof(*dpu->layers) * dpu->pending_planes);
+
+	dpu->pending_planes = 0;
+}
+
+static void sprd_crtc_atomic_flush(struct drm_crtc *crtc,
+				  struct drm_crtc_state *old_state)
+
+{
+	struct sprd_dpu *dpu = crtc_to_dpu(crtc);
+	struct drm_device *drm = dpu->crtc.dev;
+
+	if (dpu->pending_planes)
+		dpu->core->flip(&dpu->ctx, dpu->layers, dpu->pending_planes);
+
+	spin_lock_irq(&drm->event_lock);
+	if (crtc->state->event) {
+		drm_crtc_send_vblank_event(crtc, crtc->state->event);
+		crtc->state->event = NULL;
+	}
+	spin_unlock_irq(&drm->event_lock);
+}
+
+static int sprd_crtc_enable_vblank(struct drm_crtc *crtc)
+{
+	struct sprd_dpu *dpu = crtc_to_dpu(crtc);
+
+	dpu->core->enable_vsync(&dpu->ctx);
+
+	return 0;
+}
+
+static void sprd_crtc_disable_vblank(struct drm_crtc *crtc)
+{
+	struct sprd_dpu *dpu = crtc_to_dpu(crtc);
+
+	dpu->core->disable_vsync(&dpu->ctx);
+}
+
+static const struct drm_crtc_helper_funcs sprd_crtc_helper_funcs = {
+	.mode_valid	= sprd_crtc_mode_valid,
+	.atomic_check	= sprd_crtc_atomic_check,
+	.atomic_begin	= sprd_crtc_atomic_begin,
+	.atomic_flush	= sprd_crtc_atomic_flush,
+	.atomic_enable	= sprd_crtc_atomic_enable,
+	.atomic_disable	= sprd_crtc_atomic_disable,
+};
+
+static const struct drm_crtc_funcs sprd_crtc_funcs = {
+	.destroy	= drm_crtc_cleanup,
+	.set_config	= drm_atomic_helper_set_config,
+	.page_flip	= drm_atomic_helper_page_flip,
+	.reset		= drm_atomic_helper_crtc_reset,
+	.atomic_duplicate_state	= drm_atomic_helper_crtc_duplicate_state,
+	.atomic_destroy_state	= drm_atomic_helper_crtc_destroy_state,
+	.enable_vblank	= sprd_crtc_enable_vblank,
+	.disable_vblank	= sprd_crtc_disable_vblank,
+};
+
+static int sprd_crtc_init(struct drm_device *drm, struct drm_crtc *crtc,
+			 struct drm_plane *primary)
+{
+	struct device_node *port;
+	int ret;
+
+	/*
+	 * set crtc port so that drm_of_find_possible_crtcs call works
+	 */
+	port = of_parse_phandle(drm->dev->of_node, "ports", 0);
+	if (!port) {
+		DRM_ERROR("find 'ports' phandle of %s failed\n",
+			  drm->dev->of_node->full_name);
+		return -EINVAL;
+	}
+	of_node_put(port);
+	crtc->port = port;
+
+	ret = drm_crtc_init_with_planes(drm, crtc, primary, NULL,
+					&sprd_crtc_funcs, NULL);
+	if (ret) {
+		DRM_ERROR("failed to init crtc.\n");
+		return ret;
+	}
+
+	drm_mode_crtc_set_gamma_size(crtc, 256);
+
+	drm_crtc_helper_add(crtc, &sprd_crtc_helper_funcs);
+
+	return 0;
+}
+
+static void sprd_dpu_init(struct sprd_dpu *dpu)
+{
+	struct dpu_context *ctx = &dpu->ctx;
+
+	dpu->core->init(ctx);
+	dpu->core->ifconfig(ctx);
+}
+
+static void sprd_dpu_fini(struct sprd_dpu *dpu)
+{
+	struct dpu_context *ctx = &dpu->ctx;
+
+	dpu->core->fini(ctx);
+}
+
+static irqreturn_t sprd_dpu_isr(int irq, void *data)
+{
+	struct sprd_dpu *dpu = data;
+	struct dpu_context *ctx = &dpu->ctx;
+	u32 int_mask = 0;
+
+	int_mask = dpu->core->isr(ctx);
+
+	if (int_mask & BIT_DPU_INT_ERR)
+		DRM_WARN("Warning: dpu underflow!\n");
+
+	if (int_mask & BIT_DPU_INT_VSYNC)
+		drm_crtc_handle_vblank(&dpu->crtc);
+
+	return IRQ_HANDLED;
+}
+
+static int sprd_dpu_bind(struct device *dev, struct device *master, void *data)
+{
+	struct drm_device *drm = data;
+	struct sprd_dpu *dpu = dev_get_drvdata(dev);
+	struct drm_plane *plane;
+	int ret;
+
+	plane = sprd_plane_init(drm, dpu);
+	if (IS_ERR_OR_NULL(plane)) {
+		ret = PTR_ERR(plane);
+		return ret;
+	}
+
+	ret = sprd_crtc_init(drm, &dpu->crtc, plane);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static void sprd_dpu_unbind(struct device *dev, struct device *master,
+	void *data)
+{
+	struct sprd_dpu *dpu = dev_get_drvdata(dev);
+
+	drm_crtc_cleanup(&dpu->crtc);
+}
+
+static const struct component_ops dpu_component_ops = {
+	.bind = sprd_dpu_bind,
+	.unbind = sprd_dpu_unbind,
+};
+
+static int sprd_dpu_context_init(struct sprd_dpu *dpu,
+				struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dpu_context *ctx = &dpu->ctx;
+	struct resource *res;
+	int ret;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	ctx->base = devm_ioremap(dev, res->start, resource_size(res));
+	if (!ctx->base) {
+		dev_err(dev, "failed to map dpu registers\n");
+		return -EFAULT;
+	}
+
+	ctx->irq = platform_get_irq(pdev, 0);
+	if (ctx->irq < 0) {
+		dev_err(dev, "failed to get dpu irq\n");
+		return ctx->irq;
+	}
+
+	irq_set_status_flags(ctx->irq, IRQ_NOAUTOEN);
+	ret = devm_request_irq(dev, ctx->irq, sprd_dpu_isr,
+					0, "DPU", dpu);
+	if (ret) {
+		dev_err(dev, "failed to register dpu irq handler\n");
+		return ret;
+	}
+
+	init_waitqueue_head(&ctx->wait_queue);
+
+	return 0;
+}
+
+static const struct sprd_dpu_ops sharkl3_dpu = {
+	.core = &dpu_r2p0_core_ops,
+};
+
+static const struct of_device_id dpu_match_table[] = {
+	{ .compatible = "sprd,sharkl3-dpu",
+	  .data = &sharkl3_dpu },
+	{ /* sentinel */ },
+};
+
+static int sprd_dpu_probe(struct platform_device *pdev)
+{
+	const struct sprd_dpu_ops *pdata;
+	struct sprd_dpu *dpu;
+	int ret;
+
+	dpu = devm_kzalloc(&pdev->dev, sizeof(*dpu), GFP_KERNEL);
+	if (!dpu)
+		return -ENOMEM;
+
+	pdata = of_device_get_match_data(&pdev->dev);
+	if (pdata) {
+		dpu->core = pdata->core;
+	} else {
+		dev_err(&pdev->dev, "No matching driver data found\n");
+		return -EINVAL;
+	}
+
+	ret = sprd_dpu_context_init(dpu, &pdev->dev);
+	if (ret)
+		return ret;
+
+	platform_set_drvdata(pdev, dpu);
+
+	return component_add(&pdev->dev, &dpu_component_ops);
+}
+
+static int sprd_dpu_remove(struct platform_device *pdev)
+{
+	component_del(&pdev->dev, &dpu_component_ops);
+	return 0;
+}
+
+struct platform_driver sprd_dpu_driver = {
+	.probe = sprd_dpu_probe,
+	.remove = sprd_dpu_remove,
+	.driver = {
+		.name = "sprd-dpu-drv",
+		.of_match_table = dpu_match_table,
+	},
+};
+
+MODULE_AUTHOR("Leon He <leon.he@unisoc.com>");
+MODULE_AUTHOR("Kevin Tang <kevin.tang@unisoc.com>");
+MODULE_DESCRIPTION("Unisoc Display Controller Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/sprd/sprd_dpu.h b/drivers/gpu/drm/sprd/sprd_dpu.h
new file mode 100644
index 0000000..88f34ed
--- /dev/null
+++ b/drivers/gpu/drm/sprd/sprd_dpu.h
@@ -0,0 +1,214 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#ifndef __SPRD_DPU_H__
+#define __SPRD_DPU_H__
+
+#include <linux/bug.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/string.h>
+#include <video/videomode.h>
+
+#include <drm/drm_crtc.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_print.h>
+#include <drm/drm_vblank.h>
+#include <uapi/drm/drm_mode.h>
+
+/* DPU registers size, 4 Bytes */
+#define DPU_REG_SIZE	0x04
+
+/* DPU Layer registers offset */
+#define DPU_LAY_REG_OFFSET	0x0C
+
+#define BIT_DPU_INT_DONE_		BIT(0)
+#define BIT_DPU_INT_TE			BIT(1)
+#define BIT_DPU_INT_ERR			BIT(2)
+#define BIT_DPU_INT_EDPI_TE		BIT(3)
+#define BIT_DPU_INT_UPDATE_DONE		BIT(4)
+#define BIT_DPU_INT_VSYNC		BIT(5)
+#define BIT_DPU_INT_WB_DONE		BIT(6)
+#define BIT_DPU_INT_WB_ERR		BIT(7)
+
+enum {
+	SPRD_DPU_IF_DBI = 0,
+	SPRD_DPU_IF_DPI,
+	SPRD_DPU_IF_EDPI,
+	SPRD_DPU_IF_LIMIT
+};
+
+enum {
+	DPU_LAYER_ROTATION_0,
+	DPU_LAYER_ROTATION_90,
+	DPU_LAYER_ROTATION_180,
+	DPU_LAYER_ROTATION_270,
+	DPU_LAYER_ROTATION_0_M,
+	DPU_LAYER_ROTATION_90_M,
+	DPU_LAYER_ROTATION_180_M,
+	DPU_LAYER_ROTATION_270_M,
+};
+
+struct dpu_layer {
+	u8 index;
+	u8 planes;
+	u32 addr[4];
+	u32 pitch[4];
+	s16 src_x;
+	s16 src_y;
+	s16 src_w;
+	s16 src_h;
+	s16 dst_x;
+	s16 dst_y;
+	u16 dst_w;
+	u16 dst_h;
+	u32 format;
+	u32 alpha;
+	u32 blending;
+	u32 rotation;
+};
+
+/**
+ * Sprd DPU capability structure
+ *
+ * @max_layers: maximum number of layers available
+ * @fmts_ptr: A pointer to array of supported pixel formats
+ * @fmts_cnt: the number of format on @fmts_ptr
+ */
+struct dpu_capability {
+	u32 max_layers;
+	const u32 *fmts_ptr;
+	u32 fmts_cnt;
+};
+
+/**
+ * Sprd DPU core callback ops
+ *
+ * This structure decribes the display controller common
+ * callback ops
+ *
+ * @init: initial DPU core
+ * @fini: cleanup DPU core
+ * @run: enable DPU output
+ * @stop: disable DPU output
+ * @img_ctrl: plane format, rotation, and blend mode validate
+ * @enable_vsync: enable vblank interrupt
+ * @disable_vsync: disable vblank interrupt
+ * @isr: function pointer to the isr
+ * @ifconfig: initial DPI interface
+ * @flip: commit CRTC planes to DPU
+ * @capability: callback for DPU capabilities
+ */
+struct dpu_context;
+struct dpu_core_ops {
+	void (*init)(struct dpu_context *ctx);
+	void (*fini)(struct dpu_context *ctx);
+	void (*run)(struct dpu_context *ctx);
+	void (*stop)(struct dpu_context *ctx);
+	int (*img_ctrl)(struct dpu_layer *layer, u32 format,
+			u32 angle, u32 blend);
+	void (*enable_vsync)(struct dpu_context *ctx);
+	void (*disable_vsync)(struct dpu_context *ctx);
+	u32 (*isr)(struct dpu_context *ctx);
+	void (*ifconfig)(struct dpu_context *ctx);
+	void (*flip)(struct dpu_context *ctx,
+		     struct dpu_layer layers[], u8 count);
+	void (*capability)(struct dpu_context *ctx,
+			struct dpu_capability *cap);
+};
+
+/**
+ * Sprd DPU context structure
+ *
+ * @base: DPU controller base address
+ * @irq: IRQ number to install the handler for
+ * @if_type: The type of DPI interface, default is DPI mode.
+ * @vm: videomode structure to use for DPU and DPI initialization
+ * @stopped: indicates whether DPU are stopped
+ * @wait_queue: wait queue, used to wait for DPU shadow register update done and
+ * DPU stop register done interrupt signal.
+ * @evt_update: wait queue condition for DPU shadow register
+ * @evt_stop: wait queue condition for DPU stop register
+ */
+struct dpu_context {
+	void __iomem *base;
+	int irq;
+	u8 if_type;
+	struct videomode vm;
+	bool stopped;
+	wait_queue_head_t wait_queue;
+	bool evt_update;
+	bool evt_stop;
+};
+
+/**
+ * Sprd DPU device structure
+ *
+ * @crtc: DRM crtc
+ * @ctx: A pointer to the DPU's implementation specific context
+ * @core: pointer to callbacks for DPU core functionality
+ * @layers: active DPU layers ready to commit
+ * @pending_planes: the number of layers on @layers
+ */
+struct sprd_dpu {
+	struct drm_crtc crtc;
+	struct dpu_context ctx;
+	const struct dpu_core_ops *core;
+	struct dpu_layer *layers;
+	u8 pending_planes;
+};
+
+/**
+ * Sprd DPU H/W callback ops match table structure
+ * The structure used for matching a specific device callback ops
+ *
+ * @core: pointer to callbacks for DPU core functionality
+ */
+struct sprd_dpu_ops {
+	const struct dpu_core_ops *core;
+};
+
+static inline struct sprd_dpu *crtc_to_dpu(struct drm_crtc *crtc)
+{
+	return crtc ? container_of(crtc, struct sprd_dpu, crtc) : NULL;
+}
+
+static inline void
+dpu_reg_set(struct dpu_context *ctx, u32 offset, u32 set_bits)
+{
+	u32 bits = readl_relaxed(ctx->base + offset);
+
+	writel_relaxed(bits | set_bits, ctx->base + offset);
+}
+
+static inline void
+dpu_reg_clr(struct dpu_context *ctx, u32 offset, u32 clr_bits)
+{
+	u32 bits = readl_relaxed(ctx->base + offset);
+
+	writel_relaxed(bits & ~clr_bits, ctx->base + offset);
+}
+
+static inline u32
+layer_reg_rd(struct dpu_context *ctx, u32 offset, int index)
+{
+	u32 layer_offset = offset + index * DPU_LAY_REG_OFFSET * DPU_REG_SIZE;
+
+	return readl_relaxed(ctx->base + layer_offset);
+}
+
+static inline void
+layer_reg_wr(struct dpu_context *ctx, u32 offset, u32 cfg_bits, int index)
+{
+	u32 layer_offset =  offset + index * DPU_LAY_REG_OFFSET * DPU_REG_SIZE;
+
+	writel_relaxed(cfg_bits, ctx->base + layer_offset);
+}
+
+extern const struct dpu_core_ops dpu_r2p0_core_ops;
+
+#endif
diff --git a/drivers/gpu/drm/sprd/sprd_drm.c b/drivers/gpu/drm/sprd/sprd_drm.c
index ec101de..ca93be2 100644
--- a/drivers/gpu/drm/sprd/sprd_drm.c
+++ b/drivers/gpu/drm/sprd/sprd_drm.c
@@ -196,6 +196,7 @@ static struct platform_driver sprd_drm_driver = {
 
 static struct platform_driver *sprd_drm_drivers[]  = {
 	&sprd_drm_driver,
+	&sprd_dpu_driver,
 };
 
 static int __init sprd_drm_init(void)
diff --git a/drivers/gpu/drm/sprd/sprd_drm.h b/drivers/gpu/drm/sprd/sprd_drm.h
index 9781fd5..85d4a8b 100644
--- a/drivers/gpu/drm/sprd/sprd_drm.h
+++ b/drivers/gpu/drm/sprd/sprd_drm.h
@@ -13,4 +13,6 @@ struct sprd_drm {
 	struct drm_device drm;
 };
 
+extern struct platform_driver sprd_dpu_driver;
+
 #endif /* _SPRD_DRM_H_ */
-- 
2.7.4

[PATCH RFC v7 4/6] drm/sprd: add Unisoc's drm display controller driver

[Kevin Tang]

Adds DPU(Display Processor Unit) support for the Unisoc's display subsystem.
It's support multi planes, scaler, rotation, PQ(Picture Quality) and more.

RFC v7:
  - Remove plane_update stuff, dpu handles all the HW update in crtc->atomic_flush

RFC v6:
  - Access registers via readl/writel
  - Checking for unsupported KMS properties (format, rotation, blend_mode, etc) on plane_check ops
  - Remove always true checks for dpu core ops

Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
---
 drivers/gpu/drm/sprd/Kconfig    |   1 +
 drivers/gpu/drm/sprd/Makefile   |   6 +-
 drivers/gpu/drm/sprd/dpu_r2p0.c | 636 ++++++++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/sprd/sprd_dpu.c | 479 ++++++++++++++++++++++++++++++
 drivers/gpu/drm/sprd/sprd_dpu.h | 214 ++++++++++++++
 drivers/gpu/drm/sprd/sprd_drm.c |   1 +
 drivers/gpu/drm/sprd/sprd_drm.h |   2 +
 7 files changed, 1337 insertions(+), 2 deletions(-)
 create mode 100644 drivers/gpu/drm/sprd/dpu_r2p0.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_dpu.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_dpu.h

diff --git a/drivers/gpu/drm/sprd/Kconfig b/drivers/gpu/drm/sprd/Kconfig
index 6e80cc9..9b4ef9a 100644
--- a/drivers/gpu/drm/sprd/Kconfig
+++ b/drivers/gpu/drm/sprd/Kconfig
@@ -3,6 +3,7 @@ config DRM_SPRD
 	depends on ARCH_SPRD || COMPILE_TEST
 	depends on DRM && OF
 	select DRM_KMS_HELPER
+	select VIDEOMODE_HELPERS
 	select DRM_GEM_CMA_HELPER
 	select DRM_KMS_CMA_HELPER
 	select DRM_MIPI_DSI
diff --git a/drivers/gpu/drm/sprd/Makefile b/drivers/gpu/drm/sprd/Makefile
index 86d95d9..0ba48f2 100644
--- a/drivers/gpu/drm/sprd/Makefile
+++ b/drivers/gpu/drm/sprd/Makefile
@@ -1,5 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 
-subdir-ccflags-y += -I$(srctree)/$(src)
+obj-y := sprd_drm.o \
+	sprd_dpu.o
+
+obj-y += dpu_r2p0.o
 
-obj-y := sprd_drm.o
diff --git a/drivers/gpu/drm/sprd/dpu_r2p0.c b/drivers/gpu/drm/sprd/dpu_r2p0.c
new file mode 100644
index 0000000..1f2f654
--- /dev/null
+++ b/drivers/gpu/drm/sprd/dpu_r2p0.c
@@ -0,0 +1,636 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/wait.h>
+#include <linux/workqueue.h>
+
+#include "sprd_dpu.h"
+
+/* Global control registers */
+#define REG_DPU_CTRL	0x04
+#define REG_DPU_CFG0	0x08
+#define REG_DPU_CFG1	0x0C
+#define REG_DPU_CFG2	0x10
+#define REG_PANEL_SIZE	0x20
+#define REG_BLEND_SIZE	0x24
+#define REG_BG_COLOR	0x2C
+
+/* Layer0 control registers */
+#define REG_LAY_BASE_ADDR0	0x30
+#define REG_LAY_BASE_ADDR1	0x34
+#define REG_LAY_BASE_ADDR2	0x38
+#define REG_LAY_CTRL		0x40
+#define REG_LAY_SIZE		0x44
+#define REG_LAY_PITCH		0x48
+#define REG_LAY_POS		0x4C
+#define REG_LAY_ALPHA		0x50
+#define REG_LAY_PALLETE		0x58
+#define REG_LAY_CROP_START	0x5C
+
+/* Interrupt control registers */
+#define REG_DPU_INT_EN		0x1E0
+#define REG_DPU_INT_CLR		0x1E4
+#define REG_DPU_INT_STS		0x1E8
+
+/* DPI control registers */
+#define REG_DPI_CTRL		0x1F0
+#define REG_DPI_H_TIMING	0x1F4
+#define REG_DPI_V_TIMING	0x1F8
+
+/* MMU control registers */
+#define REG_MMU_EN			0x800
+#define REG_MMU_VPN_RANGE		0x80C
+#define REG_MMU_VAOR_ADDR_RD		0x818
+#define REG_MMU_VAOR_ADDR_WR		0x81C
+#define REG_MMU_INV_ADDR_RD		0x820
+#define REG_MMU_INV_ADDR_WR		0x824
+#define REG_MMU_PPN1			0x83C
+#define REG_MMU_RANGE1			0x840
+#define REG_MMU_PPN2			0x844
+#define REG_MMU_RANGE2			0x848
+
+/* Global control bits */
+#define BIT_DPU_RUN			BIT(0)
+#define BIT_DPU_STOP			BIT(1)
+#define BIT_DPU_REG_UPDATE		BIT(2)
+#define BIT_DPU_IF_EDPI			BIT(0)
+#define BIT_DPU_COEF_NARROW_RANGE		BIT(4)
+#define BIT_DPU_Y2R_COEF_ITU709_STANDARD	BIT(5)
+
+/* Layer control bits */
+#define BIT_DPU_LAY_EN				BIT(0)
+#define BIT_DPU_LAY_LAYER_ALPHA			(0x01 << 2)
+#define BIT_DPU_LAY_COMBO_ALPHA			(0x02 << 2)
+#define BIT_DPU_LAY_FORMAT_YUV422_2PLANE		(0x00 << 4)
+#define BIT_DPU_LAY_FORMAT_YUV420_2PLANE		(0x01 << 4)
+#define BIT_DPU_LAY_FORMAT_YUV420_3PLANE		(0x02 << 4)
+#define BIT_DPU_LAY_FORMAT_ARGB8888			(0x03 << 4)
+#define BIT_DPU_LAY_FORMAT_RGB565			(0x04 << 4)
+#define BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3		(0x00 << 8)
+#define BIT_DPU_LAY_DATA_ENDIAN_B3B2B1B0		(0x01 << 8)
+#define BIT_DPU_LAY_NO_SWITCH			(0x00 << 10)
+#define BIT_DPU_LAY_RB_OR_UV_SWITCH		(0x01 << 10)
+#define BIT_DPU_LAY_MODE_BLEND_NORMAL		(0x00 << 16)
+#define BIT_DPU_LAY_MODE_BLEND_PREMULT		(0x01 << 16)
+
+/* Interrupt control & status bits */
+#define BIT_DPU_INT_DONE		BIT(0)
+#define BIT_DPU_INT_TE			BIT(1)
+#define BIT_DPU_INT_ERR			BIT(2)
+#define BIT_DPU_INT_UPDATE_DONE		BIT(4)
+#define BIT_DPU_INT_VSYNC		BIT(5)
+#define BIT_DPU_INT_FBC_PLD_ERR		BIT(8)
+#define BIT_DPU_INT_FBC_HDR_ERR		BIT(9)
+#define BIT_DPU_INT_MMU_VAOR_RD		BIT(16)
+#define BIT_DPU_INT_MMU_VAOR_WR		BIT(17)
+#define BIT_DPU_INT_MMU_INV_RD		BIT(18)
+#define BIT_DPU_INT_MMU_INV_WR		BIT(19)
+
+/* DPI control bits */
+#define BIT_DPU_EDPI_TE_EN		BIT(8)
+#define BIT_DPU_EDPI_FROM_EXTERNAL_PAD	BIT(10)
+#define BIT_DPU_DPI_HALT_EN		BIT(16)
+
+static u32 check_mmu_isr(struct dpu_context *ctx, u32 reg_val)
+{
+	u32 mmu_mask = BIT_DPU_INT_MMU_VAOR_RD |
+			BIT_DPU_INT_MMU_VAOR_WR |
+			BIT_DPU_INT_MMU_INV_RD |
+			BIT_DPU_INT_MMU_INV_WR;
+	u32 val = reg_val & mmu_mask;
+	int i;
+
+	if (val) {
+		DRM_ERROR("--- iommu interrupt err: 0x%04x ---\n", val);
+
+		if (val & BIT_DPU_INT_MMU_INV_RD)
+			DRM_ERROR("iommu invalid read error, addr: 0x%08x\n",
+				readl_relaxed(ctx->base + REG_MMU_INV_ADDR_RD));
+		if (val & BIT_DPU_INT_MMU_INV_WR)
+			DRM_ERROR("iommu invalid write error, addr: 0x%08x\n",
+				readl_relaxed(ctx->base + REG_MMU_INV_ADDR_WR));
+		if (val & BIT_DPU_INT_MMU_VAOR_RD)
+			DRM_ERROR("iommu va out of range read error, addr: 0x%08x\n",
+				readl_relaxed(ctx->base + REG_MMU_VAOR_ADDR_RD));
+		if (val & BIT_DPU_INT_MMU_VAOR_WR)
+			DRM_ERROR("iommu va out of range write error, addr: 0x%08x\n",
+				readl_relaxed(ctx->base + REG_MMU_VAOR_ADDR_WR));
+
+		for (i = 0; i < 8; i++) {
+			reg_val = layer_reg_rd(ctx, REG_LAY_CTRL, i);
+			if (reg_val & 0x1)
+				DRM_INFO("layer%d: 0x%08x 0x%08x 0x%08x ctrl: 0x%08x\n", i,
+					layer_reg_rd(ctx, REG_LAY_BASE_ADDR0, i),
+					layer_reg_rd(ctx, REG_LAY_BASE_ADDR1, i),
+					layer_reg_rd(ctx, REG_LAY_BASE_ADDR2, i),
+					layer_reg_rd(ctx, REG_LAY_CTRL, i));
+		}
+	}
+
+	return val;
+}
+
+static int dpu_img_ctrl(struct dpu_layer *layer, u32 format, u32 angle, u32 blend)
+{
+	switch (format) {
+	case DRM_FORMAT_BGRA8888:
+		/* BGRA8888 -> ARGB8888 */
+		layer->format |= BIT_DPU_LAY_DATA_ENDIAN_B3B2B1B0;
+		layer->format |= BIT_DPU_LAY_FORMAT_ARGB8888;
+		break;
+	case DRM_FORMAT_RGBX8888:
+	case DRM_FORMAT_RGBA8888:
+		/* RGBA8888 -> ABGR8888 */
+		layer->format |= BIT_DPU_LAY_DATA_ENDIAN_B3B2B1B0;
+		/* FALLTHRU */
+	case DRM_FORMAT_ABGR8888:
+		/* RB switch */
+		layer->format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
+		/* FALLTHRU */
+	case DRM_FORMAT_ARGB8888:
+		layer->format |= BIT_DPU_LAY_FORMAT_ARGB8888;
+		break;
+	case DRM_FORMAT_XBGR8888:
+		/* RB switch */
+		layer->format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
+		/* FALLTHRU */
+	case DRM_FORMAT_XRGB8888:
+		layer->format |= BIT_DPU_LAY_FORMAT_ARGB8888;
+		break;
+	case DRM_FORMAT_BGR565:
+		/* RB switch */
+		layer->format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
+		/* FALLTHRU */
+	case DRM_FORMAT_RGB565:
+		layer->format |= BIT_DPU_LAY_FORMAT_RGB565;
+		break;
+	case DRM_FORMAT_NV12:
+		/* 2-Lane: Yuv420 */
+		layer->format |= BIT_DPU_LAY_FORMAT_YUV420_2PLANE;
+		/* Y endian */
+		layer->format |= BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3;
+		/* UV endian */
+		layer->format |= BIT_DPU_LAY_NO_SWITCH;
+		break;
+	case DRM_FORMAT_NV21:
+		/* 2-Lane: Yuv420 */
+		layer->format |= BIT_DPU_LAY_FORMAT_YUV420_2PLANE;
+		/* Y endian */
+		layer->format |= BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3;
+		/* UV endian */
+		layer->format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
+		break;
+	case DRM_FORMAT_NV16:
+		/* 2-Lane: Yuv422 */
+		layer->format |= BIT_DPU_LAY_FORMAT_YUV422_2PLANE;
+		/* Y endian */
+		layer->format |= BIT_DPU_LAY_DATA_ENDIAN_B3B2B1B0;
+		/* UV endian */
+		layer->format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
+		break;
+	case DRM_FORMAT_NV61:
+		/* 2-Lane: Yuv422 */
+		layer->format |= BIT_DPU_LAY_FORMAT_YUV422_2PLANE;
+		/* Y endian */
+		layer->format |= BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3;
+		/* UV endian */
+		layer->format |= BIT_DPU_LAY_NO_SWITCH;
+		break;
+	case DRM_FORMAT_YUV420:
+		layer->format |= BIT_DPU_LAY_FORMAT_YUV420_3PLANE;
+		/* Y endian */
+		layer->format |= BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3;
+		/* UV endian */
+		layer->format |= BIT_DPU_LAY_NO_SWITCH;
+		break;
+	case DRM_FORMAT_YVU420:
+		layer->format |= BIT_DPU_LAY_FORMAT_YUV420_3PLANE;
+		/* Y endian */
+		layer->format |= BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3;
+		/* UV endian */
+		layer->format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
+		break;
+	default:
+		DRM_ERROR("invalid format %c%c%c%c\n", format,
+						format >> 8,
+						format >> 16,
+						format >> 24);
+		return -EINVAL;
+	}
+
+	switch (angle) {
+	case DRM_MODE_ROTATE_0:
+		layer->rotation = DPU_LAYER_ROTATION_0;
+		break;
+	case DRM_MODE_ROTATE_90:
+		layer->rotation = DPU_LAYER_ROTATION_90;
+		break;
+	case DRM_MODE_ROTATE_180:
+		layer->rotation = DPU_LAYER_ROTATION_180;
+		break;
+	case DRM_MODE_ROTATE_270:
+		layer->rotation = DPU_LAYER_ROTATION_270;
+		break;
+	case DRM_MODE_REFLECT_Y:
+		layer->rotation = DPU_LAYER_ROTATION_180_M;
+		break;
+	case (DRM_MODE_REFLECT_Y | DRM_MODE_ROTATE_90):
+		layer->rotation = DPU_LAYER_ROTATION_90_M;
+		break;
+	case DRM_MODE_REFLECT_X:
+		layer->rotation = DPU_LAYER_ROTATION_0_M;
+		break;
+	case (DRM_MODE_REFLECT_X | DRM_MODE_ROTATE_90):
+		layer->rotation = DPU_LAYER_ROTATION_270_M;
+		break;
+	default:
+		DRM_ERROR("rotation convert unsupport angle (drm)= 0x%x\n", angle);
+		return -EINVAL;
+	}
+
+	switch (blend) {
+	case DRM_MODE_BLEND_COVERAGE:
+		/* alpha mode select - combo alpha */
+		layer->blending |= BIT_DPU_LAY_COMBO_ALPHA;
+		/* Normal mode */
+		layer->blending |= BIT_DPU_LAY_MODE_BLEND_NORMAL;
+		break;
+	case DRM_MODE_BLEND_PREMULTI:
+		/* alpha mode select - combo alpha */
+		layer->blending |= BIT_DPU_LAY_COMBO_ALPHA;
+		/* Pre-mult mode */
+		layer->blending |= BIT_DPU_LAY_MODE_BLEND_PREMULT;
+		break;
+	case DRM_MODE_BLEND_PIXEL_NONE:
+	default:
+		/* don't do blending, maybe RGBX */
+		/* alpha mode select - layer alpha */
+		layer->blending |= BIT_DPU_LAY_LAYER_ALPHA;
+		break;
+	}
+
+	return 0;
+}
+
+static void dpu_clean_all(struct dpu_context *ctx)
+{
+	int i;
+
+	for (i = 0; i < 8; i++)
+		layer_reg_wr(ctx, REG_LAY_CTRL, 0x00, i);
+}
+
+static u32 dpu_isr(struct dpu_context *ctx)
+{
+	u32 reg_val, int_mask = 0;
+
+	reg_val = readl_relaxed(ctx->base + REG_DPU_INT_STS);
+
+	/* disable err interrupt */
+	if (reg_val & BIT_DPU_INT_ERR)
+		int_mask |= BIT_DPU_INT_ERR;
+
+	/* dpu update done isr */
+	if (reg_val & BIT_DPU_INT_UPDATE_DONE) {
+		ctx->evt_update = true;
+		wake_up_interruptible_all(&ctx->wait_queue);
+	}
+
+	/* dpu stop done isr */
+	if (reg_val & BIT_DPU_INT_DONE) {
+		ctx->evt_stop = true;
+		wake_up_interruptible_all(&ctx->wait_queue);
+	}
+
+	/* dpu ifbc payload error isr */
+	if (reg_val & BIT_DPU_INT_FBC_PLD_ERR) {
+		int_mask |= BIT_DPU_INT_FBC_PLD_ERR;
+		DRM_ERROR("dpu ifbc payload error\n");
+	}
+
+	/* dpu ifbc header error isr */
+	if (reg_val & BIT_DPU_INT_FBC_HDR_ERR) {
+		int_mask |= BIT_DPU_INT_FBC_HDR_ERR;
+		DRM_ERROR("dpu ifbc header error\n");
+	}
+
+	int_mask |= check_mmu_isr(ctx, reg_val);
+
+	writel_relaxed(reg_val, ctx->base + REG_DPU_INT_CLR);
+	dpu_reg_clr(ctx, REG_DPU_INT_EN, int_mask);
+
+	return reg_val;
+}
+
+static int dpu_wait_stop_done(struct dpu_context *ctx)
+{
+	int rc;
+
+	if (ctx->stopped)
+		return 0;
+
+	rc = wait_event_interruptible_timeout(ctx->wait_queue, ctx->evt_stop,
+					       msecs_to_jiffies(500));
+	ctx->evt_stop = false;
+
+	ctx->stopped = true;
+
+	if (!rc) {
+		DRM_ERROR("dpu wait for stop done time out!\n");
+		return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+static int dpu_wait_update_done(struct dpu_context *ctx)
+{
+	int rc;
+
+	ctx->evt_update = false;
+
+	rc = wait_event_interruptible_timeout(ctx->wait_queue, ctx->evt_update,
+					       msecs_to_jiffies(500));
+
+	if (!rc) {
+		DRM_ERROR("dpu wait for reg update done time out!\n");
+		return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+static void dpu_stop(struct dpu_context *ctx)
+{
+	if (ctx->if_type == SPRD_DPU_IF_DPI)
+		dpu_reg_set(ctx, REG_DPU_CTRL, BIT_DPU_STOP);
+
+	dpu_wait_stop_done(ctx);
+}
+
+static void dpu_run(struct dpu_context *ctx)
+{
+	dpu_reg_set(ctx, REG_DPU_CTRL, BIT_DPU_RUN);
+
+	ctx->stopped = false;
+}
+
+static void dpu_init(struct dpu_context *ctx)
+{
+	u32 reg_val, size;
+
+	writel_relaxed(0x00, ctx->base + REG_BG_COLOR);
+
+	size = (ctx->vm.vactive << 16) | ctx->vm.hactive;
+
+	writel_relaxed(size, ctx->base + REG_PANEL_SIZE);
+	writel_relaxed(size, ctx->base + REG_BLEND_SIZE);
+
+	reg_val = BIT_DPU_COEF_NARROW_RANGE | BIT_DPU_Y2R_COEF_ITU709_STANDARD;
+	writel_relaxed(reg_val, ctx->base + REG_DPU_CFG0);
+	writel_relaxed(0x004466da, ctx->base + REG_DPU_CFG1);
+	writel_relaxed(0x00, ctx->base + REG_DPU_CFG2);
+
+	if (ctx->stopped)
+		dpu_clean_all(ctx);
+
+	writel_relaxed(0x00, ctx->base + REG_MMU_EN);
+	writel_relaxed(0x00, ctx->base + REG_MMU_PPN1);
+	writel_relaxed(0xffff, ctx->base + REG_MMU_RANGE1);
+	writel_relaxed(0x00, ctx->base + REG_MMU_PPN2);
+	writel_relaxed(0xffff, ctx->base + REG_MMU_RANGE2);
+	writel_relaxed(0x1ffff, ctx->base + REG_MMU_VPN_RANGE);
+
+	writel_relaxed(0xffff, ctx->base + REG_DPU_INT_CLR);
+}
+
+static void dpu_fini(struct dpu_context *ctx)
+{
+	writel_relaxed(0x00, ctx->base + REG_DPU_INT_EN);
+	writel_relaxed(0xff, ctx->base + REG_DPU_INT_CLR);
+}
+
+static void dpu_layer(struct dpu_context *ctx, struct dpu_layer *hwlayer)
+{
+	const struct drm_format_info *info;
+	u32 size, offset, ctrl, pitch;
+	int i;
+
+	offset = (hwlayer->dst_x & 0xffff) | ((hwlayer->dst_y) << 16);
+
+	if (hwlayer->src_w && hwlayer->src_h)
+		size = (hwlayer->src_w & 0xffff) | ((hwlayer->src_h) << 16);
+	else
+		size = (hwlayer->dst_w & 0xffff) | ((hwlayer->dst_h) << 16);
+
+	for (i = 0; i < hwlayer->planes; i++)
+		layer_reg_wr(ctx, REG_LAY_BASE_ADDR0, hwlayer->addr[i], hwlayer->index);
+
+	layer_reg_wr(ctx, REG_LAY_POS, offset, hwlayer->index);
+	layer_reg_wr(ctx, REG_LAY_SIZE, size, hwlayer->index);
+	layer_reg_wr(ctx, REG_LAY_CROP_START,
+			hwlayer->src_y << 16 | hwlayer->src_x, hwlayer->index);
+	layer_reg_wr(ctx, REG_LAY_ALPHA, hwlayer->alpha, hwlayer->index);
+
+	info = drm_format_info(hwlayer->format);
+	if (hwlayer->planes == 3) {
+		/* UV pitch is 1/2 of Y pitch*/
+		pitch = (hwlayer->pitch[0] / info->cpp[0]) |
+				(hwlayer->pitch[0] / info->cpp[0] << 15);
+		layer_reg_wr(ctx, REG_LAY_PITCH, pitch, hwlayer->index);
+	} else {
+		pitch = hwlayer->pitch[0] / info->cpp[0];
+		layer_reg_wr(ctx, REG_LAY_PITCH, pitch, hwlayer->index);
+	}
+
+	ctrl = hwlayer->format |
+		hwlayer->blending |
+		(hwlayer->rotation & 0x7) << 20;
+
+	layer_reg_wr(ctx, REG_LAY_CTRL, ctrl, hwlayer->index);
+	layer_reg_wr(ctx, REG_LAY_CTRL, BIT_DPU_LAY_EN, hwlayer->index);
+
+	DRM_DEBUG("dst_x = %d, dst_y = %d, dst_w = %d, dst_h = %d\n",
+				hwlayer->dst_x, hwlayer->dst_y,
+				hwlayer->dst_w, hwlayer->dst_h);
+	DRM_DEBUG("start_x = %d, start_y = %d, start_w = %d, start_h = %d\n",
+				hwlayer->src_x, hwlayer->src_y,
+				hwlayer->src_w, hwlayer->src_h);
+}
+
+static void dpu_flip(struct dpu_context *ctx,
+		     struct dpu_layer layers[], u8 count)
+{
+	int i;
+	u32 reg_val;
+
+	/*
+	 * Make sure the dpu is in stop status. DPU_R2P0 has no shadow
+	 * registers in EDPI mode. So the config registers can only be
+	 * updated in the rising edge of DPU_RUN bit.
+	 */
+	if (ctx->if_type == SPRD_DPU_IF_EDPI)
+		dpu_wait_stop_done(ctx);
+
+	/* reset the bgcolor to black */
+	writel_relaxed(0x00, ctx->base + REG_BG_COLOR);
+
+	/* disable all the layers */
+	dpu_clean_all(ctx);
+
+	/* start configure dpu layers */
+	for (i = 0; i < count; i++)
+		dpu_layer(ctx, &layers[i]);
+
+	/* update trigger and wait */
+	if (ctx->if_type == SPRD_DPU_IF_DPI) {
+		if (!ctx->stopped) {
+			dpu_reg_set(ctx, REG_DPU_CTRL, BIT_DPU_REG_UPDATE);
+			dpu_wait_update_done(ctx);
+		}
+
+		dpu_reg_set(ctx, REG_DPU_INT_EN, BIT_DPU_INT_ERR);
+	} else if (ctx->if_type == SPRD_DPU_IF_EDPI) {
+		dpu_reg_set(ctx, REG_DPU_CTRL, BIT_DPU_RUN);
+
+		ctx->stopped = false;
+	}
+
+	/*
+	 * If the following interrupt was disabled in isr,
+	 * re-enable it.
+	 */
+	reg_val = BIT_DPU_INT_FBC_PLD_ERR |
+		  BIT_DPU_INT_FBC_HDR_ERR |
+		  BIT_DPU_INT_MMU_VAOR_RD |
+		  BIT_DPU_INT_MMU_VAOR_WR |
+		  BIT_DPU_INT_MMU_INV_RD |
+		  BIT_DPU_INT_MMU_INV_WR;
+	dpu_reg_set(ctx, REG_DPU_INT_EN, reg_val);
+
+}
+
+static void dpu_dpi_init(struct dpu_context *ctx)
+{
+	u32 int_mask = 0;
+	u32 reg_val;
+
+	if (ctx->if_type == SPRD_DPU_IF_DPI) {
+		/* use dpi as interface */
+		dpu_reg_clr(ctx, REG_DPU_CFG0, BIT_DPU_IF_EDPI);
+
+		/* disable Halt function for SPRD DSI */
+		dpu_reg_clr(ctx, REG_DPI_CTRL, BIT_DPU_DPI_HALT_EN);
+
+		/* select te from external pad */
+		dpu_reg_set(ctx, REG_DPI_CTRL, BIT_DPU_EDPI_FROM_EXTERNAL_PAD);
+
+		/* set dpi timing */
+		reg_val = ctx->vm.hsync_len << 0 |
+			  ctx->vm.hback_porch << 8 |
+			  ctx->vm.hfront_porch << 20;
+		writel_relaxed(reg_val, ctx->base + REG_DPI_H_TIMING);
+
+		reg_val = ctx->vm.vsync_len << 0 |
+			  ctx->vm.vback_porch << 8 |
+			  ctx->vm.vfront_porch << 20;
+		writel_relaxed(reg_val, ctx->base + REG_DPI_V_TIMING);
+
+		if (ctx->vm.vsync_len + ctx->vm.vback_porch < 32)
+			DRM_WARN("Warning: (vsync + vbp) < 32, "
+				"underflow risk!\n");
+
+		/* enable dpu update done INT */
+		int_mask |= BIT_DPU_INT_UPDATE_DONE;
+		/* enable dpu DONE  INT */
+		int_mask |= BIT_DPU_INT_DONE;
+		/* enable dpu dpi vsync */
+		int_mask |= BIT_DPU_INT_VSYNC;
+		/* enable dpu TE INT */
+		int_mask |= BIT_DPU_INT_TE;
+		/* enable underflow err INT */
+		int_mask |= BIT_DPU_INT_ERR;
+	} else if (ctx->if_type == SPRD_DPU_IF_EDPI) {
+		/* use edpi as interface */
+		dpu_reg_set(ctx, REG_DPU_CFG0, BIT_DPU_IF_EDPI);
+
+		/* use external te */
+		dpu_reg_set(ctx, REG_DPI_CTRL, BIT_DPU_EDPI_FROM_EXTERNAL_PAD);
+
+		/* enable te */
+		dpu_reg_set(ctx, REG_DPI_CTRL, BIT_DPU_EDPI_TE_EN);
+
+		/* enable stop DONE INT */
+		int_mask |= BIT_DPU_INT_DONE;
+		/* enable TE INT */
+		int_mask |= BIT_DPU_INT_TE;
+	}
+
+	/* enable ifbc payload error INT */
+	int_mask |= BIT_DPU_INT_FBC_PLD_ERR;
+	/* enable ifbc header error INT */
+	int_mask |= BIT_DPU_INT_FBC_HDR_ERR;
+	/* enable iommu va out of range read error INT */
+	int_mask |= BIT_DPU_INT_MMU_VAOR_RD;
+	/* enable iommu va out of range write error INT */
+	int_mask |= BIT_DPU_INT_MMU_VAOR_WR;
+	/* enable iommu invalid read error INT */
+	int_mask |= BIT_DPU_INT_MMU_INV_RD;
+	/* enable iommu invalid write error INT */
+	int_mask |= BIT_DPU_INT_MMU_INV_WR;
+
+	writel_relaxed(int_mask, ctx->base + REG_DPU_INT_EN);
+}
+
+static void enable_vsync(struct dpu_context *ctx)
+{
+	dpu_reg_set(ctx, REG_DPU_INT_EN, BIT_DPU_INT_VSYNC);
+}
+
+static void disable_vsync(struct dpu_context *ctx)
+{
+	dpu_reg_clr(ctx, REG_DPU_INT_EN, BIT_DPU_INT_VSYNC);
+}
+
+static const u32 primary_fmts[] = {
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_ABGR8888,
+	DRM_FORMAT_RGBA8888,
+	DRM_FORMAT_BGRA8888,
+	DRM_FORMAT_RGBX8888,
+	DRM_FORMAT_RGB565,
+	DRM_FORMAT_BGR565,
+	DRM_FORMAT_NV12,
+	DRM_FORMAT_NV21,
+	DRM_FORMAT_NV16,
+	DRM_FORMAT_NV61,
+	DRM_FORMAT_YUV420,
+	DRM_FORMAT_YVU420,
+};
+
+static void dpu_capability(struct dpu_context *ctx, struct dpu_capability *cap)
+{
+	cap->max_layers = 6;
+	cap->fmts_ptr = primary_fmts;
+	cap->fmts_cnt = ARRAY_SIZE(primary_fmts);
+}
+
+const struct dpu_core_ops dpu_r2p0_core_ops = {
+	.init = dpu_init,
+	.fini = dpu_fini,
+	.run = dpu_run,
+	.stop = dpu_stop,
+	.isr = dpu_isr,
+	.ifconfig = dpu_dpi_init,
+	.capability = dpu_capability,
+	.img_ctrl = dpu_img_ctrl,
+	.flip = dpu_flip,
+	.enable_vsync = enable_vsync,
+	.disable_vsync = disable_vsync,
+};
diff --git a/drivers/gpu/drm/sprd/sprd_dpu.c b/drivers/gpu/drm/sprd/sprd_dpu.c
new file mode 100644
index 0000000..f6aa47b
--- /dev/null
+++ b/drivers/gpu/drm/sprd/sprd_dpu.c
@@ -0,0 +1,479 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#include <linux/component.h>
+#include <linux/dma-buf.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_plane_helper.h>
+
+#include "sprd_drm.h"
+#include "sprd_dpu.h"
+
+struct sprd_plane {
+	struct drm_plane plane;
+	u32 index;
+};
+
+static void sprd_dpu_init(struct sprd_dpu *dpu);
+static void sprd_dpu_fini(struct sprd_dpu *dpu);
+
+static inline struct sprd_plane *to_sprd_plane(struct drm_plane *plane)
+{
+	return container_of(plane, struct sprd_plane, plane);
+}
+
+static int sprd_plane_atomic_check(struct drm_plane *plane,
+				  struct drm_plane_state *state)
+{
+	struct sprd_plane *p = to_sprd_plane(plane);
+	struct sprd_dpu *dpu = crtc_to_dpu(plane->state->crtc);
+	struct dpu_layer *layer = &dpu->layers[p->index];
+	struct drm_framebuffer *fb = state->fb;
+	struct drm_gem_cma_object *cma_obj;
+	int i, ret;
+	u32 addr;
+
+	if (!state->fb || !state->crtc)
+		return 0;
+
+	ret = dpu->core->img_ctrl(layer, fb->format->format, state->rotation,
+			state->pixel_blend_mode);
+	if (ret < 0)
+		return ret;
+
+	layer->index = p->index;
+	layer->src_x = state->src_x >> 16;
+	layer->src_y = state->src_y >> 16;
+	layer->src_w = state->src_w >> 16;
+	layer->src_h = state->src_h >> 16;
+	layer->dst_x = state->crtc_x;
+	layer->dst_y = state->crtc_y;
+	layer->dst_w = state->crtc_w;
+	layer->dst_h = state->crtc_h;
+	layer->alpha = state->alpha;
+	layer->planes = fb->format->num_planes;
+
+	for (i = 0; i < fb->format->num_planes; i++) {
+		cma_obj = drm_fb_cma_get_gem_obj(fb, i);
+		addr = cma_obj->paddr + fb->offsets[i];
+		if (addr % 16) {
+			DRM_ERROR("layer addr[%d] is not 16 bytes align, it's 0x%08x\n",
+				i, addr);
+			return -EFAULT;
+		}
+
+		layer->addr[i] = addr;
+		layer->pitch[i] = fb->pitches[i];
+	}
+
+	dpu->pending_planes++;
+
+	return 0;
+}
+
+/* plane doesn't represent a real HW, so there is no HW update for plane.
+ * dpu handles all the HW update in crtc->atomic_flush
+ */
+static void sprd_plane_atomic_update(struct drm_plane *plane,
+				    struct drm_plane_state *old_state)
+{
+	DRM_DEBUG("%s()\n", __func__);
+}
+
+static void sprd_plane_create_properties(struct sprd_plane *p, int index)
+{
+	unsigned int supported_modes = BIT(DRM_MODE_BLEND_PIXEL_NONE) |
+				       BIT(DRM_MODE_BLEND_PREMULTI) |
+				       BIT(DRM_MODE_BLEND_COVERAGE);
+
+	/* create rotation property */
+	drm_plane_create_rotation_property(&p->plane,
+					   DRM_MODE_ROTATE_0,
+					   DRM_MODE_ROTATE_MASK |
+					   DRM_MODE_REFLECT_MASK);
+
+	/* create alpha property */
+	drm_plane_create_alpha_property(&p->plane);
+
+	/* create blend mode property */
+	drm_plane_create_blend_mode_property(&p->plane, supported_modes);
+
+	/* create zpos property */
+	drm_plane_create_zpos_immutable_property(&p->plane, index);
+}
+
+static const struct drm_plane_helper_funcs sprd_plane_helper_funcs = {
+	.atomic_check = sprd_plane_atomic_check,
+	.atomic_update = sprd_plane_atomic_update,
+};
+
+static const struct drm_plane_funcs sprd_plane_funcs = {
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane	= drm_atomic_helper_disable_plane,
+	.destroy = drm_plane_cleanup,
+	.reset = drm_atomic_helper_plane_reset,
+	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+};
+
+static struct drm_plane *sprd_plane_init(struct drm_device *drm,
+					struct sprd_dpu *dpu)
+{
+	struct drm_plane *primary = NULL;
+	struct sprd_plane *p = NULL;
+	struct dpu_capability cap = {};
+	int ret, i;
+
+	dpu->core->capability(&dpu->ctx, &cap);
+
+	dpu->layers = devm_kcalloc(drm->dev, cap.max_layers,
+				  sizeof(struct dpu_layer), GFP_KERNEL);
+	if (!dpu->layers)
+		return ERR_PTR(-ENOMEM);
+
+	for (i = 0; i < cap.max_layers; i++) {
+
+		p = devm_kzalloc(drm->dev, sizeof(*p), GFP_KERNEL);
+		if (!p)
+			return ERR_PTR(-ENOMEM);
+
+		ret = drm_universal_plane_init(drm, &p->plane, 1,
+					       &sprd_plane_funcs, cap.fmts_ptr,
+					       cap.fmts_cnt, NULL,
+					       DRM_PLANE_TYPE_PRIMARY, NULL);
+		if (ret) {
+			DRM_ERROR("fail to init primary plane\n");
+			return ERR_PTR(ret);
+		}
+
+		drm_plane_helper_add(&p->plane, &sprd_plane_helper_funcs);
+
+		sprd_plane_create_properties(p, i);
+
+		p->index = i;
+		if (i == 0)
+			primary = &p->plane;
+	}
+
+	return primary;
+}
+
+static enum drm_mode_status sprd_crtc_mode_valid(struct drm_crtc *crtc,
+					const struct drm_display_mode *mode)
+{
+	struct sprd_dpu *dpu = crtc_to_dpu(crtc);
+
+	DRM_DEBUG("%s() mode: "DRM_MODE_FMT"\n", __func__, DRM_MODE_ARG(mode));
+
+	if (mode->type & DRM_MODE_TYPE_PREFERRED) {
+		drm_display_mode_to_videomode(mode, &dpu->ctx.vm);
+
+		if ((mode->hdisplay == mode->htotal) ||
+		    (mode->vdisplay == mode->vtotal))
+			dpu->ctx.if_type = SPRD_DPU_IF_EDPI;
+		else
+			dpu->ctx.if_type = SPRD_DPU_IF_DPI;
+	}
+
+	return MODE_OK;
+}
+
+static void sprd_crtc_atomic_enable(struct drm_crtc *crtc,
+				   struct drm_crtc_state *old_state)
+{
+	struct sprd_dpu *dpu = crtc_to_dpu(crtc);
+
+	sprd_dpu_init(dpu);
+
+	enable_irq(dpu->ctx.irq);
+}
+
+static void sprd_crtc_atomic_disable(struct drm_crtc *crtc,
+				    struct drm_crtc_state *old_state)
+{
+	struct sprd_dpu *dpu = crtc_to_dpu(crtc);
+	struct drm_device *drm = dpu->crtc.dev;
+
+	disable_irq(dpu->ctx.irq);
+
+	sprd_dpu_fini(dpu);
+
+	spin_lock_irq(&drm->event_lock);
+	if (crtc->state->event) {
+		drm_crtc_send_vblank_event(crtc, crtc->state->event);
+		crtc->state->event = NULL;
+	}
+	spin_unlock_irq(&drm->event_lock);
+}
+
+static int sprd_crtc_atomic_check(struct drm_crtc *crtc,
+				 struct drm_crtc_state *state)
+{
+	DRM_DEBUG("%s()\n", __func__);
+
+	return 0;
+}
+
+static void sprd_crtc_atomic_begin(struct drm_crtc *crtc,
+				  struct drm_crtc_state *old_state)
+{
+	struct sprd_dpu *dpu = crtc_to_dpu(crtc);
+
+	memset(dpu->layers, 0, sizeof(*dpu->layers) * dpu->pending_planes);
+
+	dpu->pending_planes = 0;
+}
+
+static void sprd_crtc_atomic_flush(struct drm_crtc *crtc,
+				  struct drm_crtc_state *old_state)
+
+{
+	struct sprd_dpu *dpu = crtc_to_dpu(crtc);
+	struct drm_device *drm = dpu->crtc.dev;
+
+	if (dpu->pending_planes)
+		dpu->core->flip(&dpu->ctx, dpu->layers, dpu->pending_planes);
+
+	spin_lock_irq(&drm->event_lock);
+	if (crtc->state->event) {
+		drm_crtc_send_vblank_event(crtc, crtc->state->event);
+		crtc->state->event = NULL;
+	}
+	spin_unlock_irq(&drm->event_lock);
+}
+
+static int sprd_crtc_enable_vblank(struct drm_crtc *crtc)
+{
+	struct sprd_dpu *dpu = crtc_to_dpu(crtc);
+
+	dpu->core->enable_vsync(&dpu->ctx);
+
+	return 0;
+}
+
+static void sprd_crtc_disable_vblank(struct drm_crtc *crtc)
+{
+	struct sprd_dpu *dpu = crtc_to_dpu(crtc);
+
+	dpu->core->disable_vsync(&dpu->ctx);
+}
+
+static const struct drm_crtc_helper_funcs sprd_crtc_helper_funcs = {
+	.mode_valid	= sprd_crtc_mode_valid,
+	.atomic_check	= sprd_crtc_atomic_check,
+	.atomic_begin	= sprd_crtc_atomic_begin,
+	.atomic_flush	= sprd_crtc_atomic_flush,
+	.atomic_enable	= sprd_crtc_atomic_enable,
+	.atomic_disable	= sprd_crtc_atomic_disable,
+};
+
+static const struct drm_crtc_funcs sprd_crtc_funcs = {
+	.destroy	= drm_crtc_cleanup,
+	.set_config	= drm_atomic_helper_set_config,
+	.page_flip	= drm_atomic_helper_page_flip,
+	.reset		= drm_atomic_helper_crtc_reset,
+	.atomic_duplicate_state	= drm_atomic_helper_crtc_duplicate_state,
+	.atomic_destroy_state	= drm_atomic_helper_crtc_destroy_state,
+	.enable_vblank	= sprd_crtc_enable_vblank,
+	.disable_vblank	= sprd_crtc_disable_vblank,
+};
+
+static int sprd_crtc_init(struct drm_device *drm, struct drm_crtc *crtc,
+			 struct drm_plane *primary)
+{
+	struct device_node *port;
+	int ret;
+
+	/*
+	 * set crtc port so that drm_of_find_possible_crtcs call works
+	 */
+	port = of_parse_phandle(drm->dev->of_node, "ports", 0);
+	if (!port) {
+		DRM_ERROR("find 'ports' phandle of %s failed\n",
+			  drm->dev->of_node->full_name);
+		return -EINVAL;
+	}
+	of_node_put(port);
+	crtc->port = port;
+
+	ret = drm_crtc_init_with_planes(drm, crtc, primary, NULL,
+					&sprd_crtc_funcs, NULL);
+	if (ret) {
+		DRM_ERROR("failed to init crtc.\n");
+		return ret;
+	}
+
+	drm_mode_crtc_set_gamma_size(crtc, 256);
+
+	drm_crtc_helper_add(crtc, &sprd_crtc_helper_funcs);
+
+	return 0;
+}
+
+static void sprd_dpu_init(struct sprd_dpu *dpu)
+{
+	struct dpu_context *ctx = &dpu->ctx;
+
+	dpu->core->init(ctx);
+	dpu->core->ifconfig(ctx);
+}
+
+static void sprd_dpu_fini(struct sprd_dpu *dpu)
+{
+	struct dpu_context *ctx = &dpu->ctx;
+
+	dpu->core->fini(ctx);
+}
+
+static irqreturn_t sprd_dpu_isr(int irq, void *data)
+{
+	struct sprd_dpu *dpu = data;
+	struct dpu_context *ctx = &dpu->ctx;
+	u32 int_mask = 0;
+
+	int_mask = dpu->core->isr(ctx);
+
+	if (int_mask & BIT_DPU_INT_ERR)
+		DRM_WARN("Warning: dpu underflow!\n");
+
+	if (int_mask & BIT_DPU_INT_VSYNC)
+		drm_crtc_handle_vblank(&dpu->crtc);
+
+	return IRQ_HANDLED;
+}
+
+static int sprd_dpu_bind(struct device *dev, struct device *master, void *data)
+{
+	struct drm_device *drm = data;
+	struct sprd_dpu *dpu = dev_get_drvdata(dev);
+	struct drm_plane *plane;
+	int ret;
+
+	plane = sprd_plane_init(drm, dpu);
+	if (IS_ERR_OR_NULL(plane)) {
+		ret = PTR_ERR(plane);
+		return ret;
+	}
+
+	ret = sprd_crtc_init(drm, &dpu->crtc, plane);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static void sprd_dpu_unbind(struct device *dev, struct device *master,
+	void *data)
+{
+	struct sprd_dpu *dpu = dev_get_drvdata(dev);
+
+	drm_crtc_cleanup(&dpu->crtc);
+}
+
+static const struct component_ops dpu_component_ops = {
+	.bind = sprd_dpu_bind,
+	.unbind = sprd_dpu_unbind,
+};
+
+static int sprd_dpu_context_init(struct sprd_dpu *dpu,
+				struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dpu_context *ctx = &dpu->ctx;
+	struct resource *res;
+	int ret;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	ctx->base = devm_ioremap(dev, res->start, resource_size(res));
+	if (!ctx->base) {
+		dev_err(dev, "failed to map dpu registers\n");
+		return -EFAULT;
+	}
+
+	ctx->irq = platform_get_irq(pdev, 0);
+	if (ctx->irq < 0) {
+		dev_err(dev, "failed to get dpu irq\n");
+		return ctx->irq;
+	}
+
+	irq_set_status_flags(ctx->irq, IRQ_NOAUTOEN);
+	ret = devm_request_irq(dev, ctx->irq, sprd_dpu_isr,
+					0, "DPU", dpu);
+	if (ret) {
+		dev_err(dev, "failed to register dpu irq handler\n");
+		return ret;
+	}
+
+	init_waitqueue_head(&ctx->wait_queue);
+
+	return 0;
+}
+
+static const struct sprd_dpu_ops sharkl3_dpu = {
+	.core = &dpu_r2p0_core_ops,
+};
+
+static const struct of_device_id dpu_match_table[] = {
+	{ .compatible = "sprd,sharkl3-dpu",
+	  .data = &sharkl3_dpu },
+	{ /* sentinel */ },
+};
+
+static int sprd_dpu_probe(struct platform_device *pdev)
+{
+	const struct sprd_dpu_ops *pdata;
+	struct sprd_dpu *dpu;
+	int ret;
+
+	dpu = devm_kzalloc(&pdev->dev, sizeof(*dpu), GFP_KERNEL);
+	if (!dpu)
+		return -ENOMEM;
+
+	pdata = of_device_get_match_data(&pdev->dev);
+	if (pdata) {
+		dpu->core = pdata->core;
+	} else {
+		dev_err(&pdev->dev, "No matching driver data found\n");
+		return -EINVAL;
+	}
+
+	ret = sprd_dpu_context_init(dpu, &pdev->dev);
+	if (ret)
+		return ret;
+
+	platform_set_drvdata(pdev, dpu);
+
+	return component_add(&pdev->dev, &dpu_component_ops);
+}
+
+static int sprd_dpu_remove(struct platform_device *pdev)
+{
+	component_del(&pdev->dev, &dpu_component_ops);
+	return 0;
+}
+
+struct platform_driver sprd_dpu_driver = {
+	.probe = sprd_dpu_probe,
+	.remove = sprd_dpu_remove,
+	.driver = {
+		.name = "sprd-dpu-drv",
+		.of_match_table = dpu_match_table,
+	},
+};
+
+MODULE_AUTHOR("Leon He <leon.he@unisoc.com>");
+MODULE_AUTHOR("Kevin Tang <kevin.tang@unisoc.com>");
+MODULE_DESCRIPTION("Unisoc Display Controller Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/sprd/sprd_dpu.h b/drivers/gpu/drm/sprd/sprd_dpu.h
new file mode 100644
index 0000000..88f34ed
--- /dev/null
+++ b/drivers/gpu/drm/sprd/sprd_dpu.h
@@ -0,0 +1,214 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#ifndef __SPRD_DPU_H__
+#define __SPRD_DPU_H__
+
+#include <linux/bug.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/string.h>
+#include <video/videomode.h>
+
+#include <drm/drm_crtc.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_print.h>
+#include <drm/drm_vblank.h>
+#include <uapi/drm/drm_mode.h>
+
+/* DPU registers size, 4 Bytes */
+#define DPU_REG_SIZE	0x04
+
+/* DPU Layer registers offset */
+#define DPU_LAY_REG_OFFSET	0x0C
+
+#define BIT_DPU_INT_DONE_		BIT(0)
+#define BIT_DPU_INT_TE			BIT(1)
+#define BIT_DPU_INT_ERR			BIT(2)
+#define BIT_DPU_INT_EDPI_TE		BIT(3)
+#define BIT_DPU_INT_UPDATE_DONE		BIT(4)
+#define BIT_DPU_INT_VSYNC		BIT(5)
+#define BIT_DPU_INT_WB_DONE		BIT(6)
+#define BIT_DPU_INT_WB_ERR		BIT(7)
+
+enum {
+	SPRD_DPU_IF_DBI = 0,
+	SPRD_DPU_IF_DPI,
+	SPRD_DPU_IF_EDPI,
+	SPRD_DPU_IF_LIMIT
+};
+
+enum {
+	DPU_LAYER_ROTATION_0,
+	DPU_LAYER_ROTATION_90,
+	DPU_LAYER_ROTATION_180,
+	DPU_LAYER_ROTATION_270,
+	DPU_LAYER_ROTATION_0_M,
+	DPU_LAYER_ROTATION_90_M,
+	DPU_LAYER_ROTATION_180_M,
+	DPU_LAYER_ROTATION_270_M,
+};
+
+struct dpu_layer {
+	u8 index;
+	u8 planes;
+	u32 addr[4];
+	u32 pitch[4];
+	s16 src_x;
+	s16 src_y;
+	s16 src_w;
+	s16 src_h;
+	s16 dst_x;
+	s16 dst_y;
+	u16 dst_w;
+	u16 dst_h;
+	u32 format;
+	u32 alpha;
+	u32 blending;
+	u32 rotation;
+};
+
+/**
+ * Sprd DPU capability structure
+ *
+ * @max_layers: maximum number of layers available
+ * @fmts_ptr: A pointer to array of supported pixel formats
+ * @fmts_cnt: the number of format on @fmts_ptr
+ */
+struct dpu_capability {
+	u32 max_layers;
+	const u32 *fmts_ptr;
+	u32 fmts_cnt;
+};
+
+/**
+ * Sprd DPU core callback ops
+ *
+ * This structure decribes the display controller common
+ * callback ops
+ *
+ * @init: initial DPU core
+ * @fini: cleanup DPU core
+ * @run: enable DPU output
+ * @stop: disable DPU output
+ * @img_ctrl: plane format, rotation, and blend mode validate
+ * @enable_vsync: enable vblank interrupt
+ * @disable_vsync: disable vblank interrupt
+ * @isr: function pointer to the isr
+ * @ifconfig: initial DPI interface
+ * @flip: commit CRTC planes to DPU
+ * @capability: callback for DPU capabilities
+ */
+struct dpu_context;
+struct dpu_core_ops {
+	void (*init)(struct dpu_context *ctx);
+	void (*fini)(struct dpu_context *ctx);
+	void (*run)(struct dpu_context *ctx);
+	void (*stop)(struct dpu_context *ctx);
+	int (*img_ctrl)(struct dpu_layer *layer, u32 format,
+			u32 angle, u32 blend);
+	void (*enable_vsync)(struct dpu_context *ctx);
+	void (*disable_vsync)(struct dpu_context *ctx);
+	u32 (*isr)(struct dpu_context *ctx);
+	void (*ifconfig)(struct dpu_context *ctx);
+	void (*flip)(struct dpu_context *ctx,
+		     struct dpu_layer layers[], u8 count);
+	void (*capability)(struct dpu_context *ctx,
+			struct dpu_capability *cap);
+};
+
+/**
+ * Sprd DPU context structure
+ *
+ * @base: DPU controller base address
+ * @irq: IRQ number to install the handler for
+ * @if_type: The type of DPI interface, default is DPI mode.
+ * @vm: videomode structure to use for DPU and DPI initialization
+ * @stopped: indicates whether DPU are stopped
+ * @wait_queue: wait queue, used to wait for DPU shadow register update done and
+ * DPU stop register done interrupt signal.
+ * @evt_update: wait queue condition for DPU shadow register
+ * @evt_stop: wait queue condition for DPU stop register
+ */
+struct dpu_context {
+	void __iomem *base;
+	int irq;
+	u8 if_type;
+	struct videomode vm;
+	bool stopped;
+	wait_queue_head_t wait_queue;
+	bool evt_update;
+	bool evt_stop;
+};
+
+/**
+ * Sprd DPU device structure
+ *
+ * @crtc: DRM crtc
+ * @ctx: A pointer to the DPU's implementation specific context
+ * @core: pointer to callbacks for DPU core functionality
+ * @layers: active DPU layers ready to commit
+ * @pending_planes: the number of layers on @layers
+ */
+struct sprd_dpu {
+	struct drm_crtc crtc;
+	struct dpu_context ctx;
+	const struct dpu_core_ops *core;
+	struct dpu_layer *layers;
+	u8 pending_planes;
+};
+
+/**
+ * Sprd DPU H/W callback ops match table structure
+ * The structure used for matching a specific device callback ops
+ *
+ * @core: pointer to callbacks for DPU core functionality
+ */
+struct sprd_dpu_ops {
+	const struct dpu_core_ops *core;
+};
+
+static inline struct sprd_dpu *crtc_to_dpu(struct drm_crtc *crtc)
+{
+	return crtc ? container_of(crtc, struct sprd_dpu, crtc) : NULL;
+}
+
+static inline void
+dpu_reg_set(struct dpu_context *ctx, u32 offset, u32 set_bits)
+{
+	u32 bits = readl_relaxed(ctx->base + offset);
+
+	writel_relaxed(bits | set_bits, ctx->base + offset);
+}
+
+static inline void
+dpu_reg_clr(struct dpu_context *ctx, u32 offset, u32 clr_bits)
+{
+	u32 bits = readl_relaxed(ctx->base + offset);
+
+	writel_relaxed(bits & ~clr_bits, ctx->base + offset);
+}
+
+static inline u32
+layer_reg_rd(struct dpu_context *ctx, u32 offset, int index)
+{
+	u32 layer_offset = offset + index * DPU_LAY_REG_OFFSET * DPU_REG_SIZE;
+
+	return readl_relaxed(ctx->base + layer_offset);
+}
+
+static inline void
+layer_reg_wr(struct dpu_context *ctx, u32 offset, u32 cfg_bits, int index)
+{
+	u32 layer_offset =  offset + index * DPU_LAY_REG_OFFSET * DPU_REG_SIZE;
+
+	writel_relaxed(cfg_bits, ctx->base + layer_offset);
+}
+
+extern const struct dpu_core_ops dpu_r2p0_core_ops;
+
+#endif
diff --git a/drivers/gpu/drm/sprd/sprd_drm.c b/drivers/gpu/drm/sprd/sprd_drm.c
index ec101de..ca93be2 100644
--- a/drivers/gpu/drm/sprd/sprd_drm.c
+++ b/drivers/gpu/drm/sprd/sprd_drm.c
@@ -196,6 +196,7 @@ static struct platform_driver sprd_drm_driver = {
 
 static struct platform_driver *sprd_drm_drivers[]  = {
 	&sprd_drm_driver,
+	&sprd_dpu_driver,
 };
 
 static int __init sprd_drm_init(void)
diff --git a/drivers/gpu/drm/sprd/sprd_drm.h b/drivers/gpu/drm/sprd/sprd_drm.h
index 9781fd5..85d4a8b 100644
--- a/drivers/gpu/drm/sprd/sprd_drm.h
+++ b/drivers/gpu/drm/sprd/sprd_drm.h
@@ -13,4 +13,6 @@ struct sprd_drm {
 	struct drm_device drm;
 };
 
+extern struct platform_driver sprd_dpu_driver;
+
 #endif /* _SPRD_DRM_H_ */
-- 
2.7.4

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dri-devel@lists.freedesktop.org
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[PATCH RFC v7 5/6] dt-bindings: display: add Unisoc's mipi dsi&dphy bindings

[Kevin Tang]

From: Kevin Tang <kevin.tang@unisoc.com>

Adds MIPI DSI Master and MIPI DSI-PHY (D-PHY)
support for Unisoc's display subsystem.

RFC v7:
  - Fix DTC unit name warnings
  - Fix the problem of maintainers

Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
---
 .../display/sprd/sprd,sharkl3-dsi-host.yaml        | 98 ++++++++++++++++++++++
 .../display/sprd/sprd,sharkl3-dsi-phy.yaml         | 75 +++++++++++++++++
 2 files changed, 173 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
 create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-phy.yaml

diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
new file mode 100644
index 0000000..b6bbf67
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
@@ -0,0 +1,98 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/sprd/sprd,sharkl3-dsi-host.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Unisoc MIPI DSI Controller
+
+maintainers:
+  - Kevin Tang <kevin.tang@unisoc.com>
+
+properties:
+  compatible:
+    const: sprd,sharkl3-dsi-host
+
+  reg:
+    maxItems: 1
+    description:
+      Physical base address and length of the registers set for the device.
+
+  interrupts:
+    maxItems: 2
+    description:
+      Should contain DSI interrupt.
+
+  clocks:
+    minItems: 1
+
+  clock-names:
+    items:
+      - const: clk_src_96m
+
+  power-domains:
+    maxItems: 1
+    description: A phandle to DSIM power domain node
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  port@0:
+    type: object
+    description:
+      A port node with endpoint definitions as defined in
+      Documentation/devicetree/bindings/media/video-interfaces.txt.
+      That port should be the input endpoint, usually coming from
+      the associated DPU.
+  port@1:
+    type: object
+    description:
+      A port node with endpoint definitions as defined in
+      Documentation/devicetree/bindings/media/video-interfaces.txt.
+      That port should be the output endpoint, usually output to
+      the associated DPHY.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - port@0
+  - port@1
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/sprd,sc9860-clk.h>
+    dsi: dsi@63100000 {
+        compatible = "sprd,sharkl3-dsi-host";
+        reg = <0x63100000 0x1000>;
+        interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>,
+          <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
+        clock-names = "clk_src_96m";
+        clocks = <&pll CLK_TWPLL_96M>;
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+        port@0 {
+            reg = <0>;
+            dsi_in: endpoint {
+                remote-endpoint = <&dpu_out>;
+            };
+        };
+
+        port@1 {
+            reg = <1>;
+            dsi_out: endpoint {
+                remote-endpoint = <&dphy_in>;
+            };
+        };
+    };
diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-phy.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-phy.yaml
new file mode 100644
index 0000000..0ab8c33
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-phy.yaml
@@ -0,0 +1,75 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/sprd/sprd,sharkl3-dsi-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Unisoc MIPI DSI-PHY (D-PHY)
+
+maintainers:
+  - Kevin Tang <kevin.tang@unisoc.com>
+
+properties:
+  compatible:
+    const: sprd,sharkl3-dsi-phy
+
+  reg:
+    maxItems: 1
+    description:
+      Must be the dsi controller base address.
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  port@0:
+    type: object
+    description:
+      A port node with endpoint definitions as defined in
+      Documentation/devicetree/bindings/media/video-interfaces.txt.
+      That port should be the output endpoint, usually output to
+      the associated panel.
+  port@1:
+    type: object
+    description:
+      A port node with endpoint definitions as defined in
+      Documentation/devicetree/bindings/media/video-interfaces.txt.
+      That port should be the input endpoint, usually coming from
+      the associated DSI controller.
+
+required:
+  - compatible
+  - reg
+  - port@0
+  - port@1
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    dphy: dphy@63100000 {
+        compatible = "sprd,sharkl3-dsi-phy";
+        reg = <0x63100000 0x1000>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        /* input port*/
+        port@1 {
+            reg = <1>;
+            dphy_in: endpoint {
+    	          remote-endpoint = <&dsi_out>;
+            };
+        };
+
+        /* output port */
+        port@0 {
+    	      reg = <0>;
+    	      dphy_out: endpoint {
+    		        remote-endpoint = <&panel_in>;
+    	      };
+        };
+    };
-- 
2.7.4

[PATCH RFC v7 5/6] dt-bindings: display: add Unisoc's mipi dsi&dphy bindings

[Kevin Tang]

From: Kevin Tang <kevin.tang@unisoc.com>

Adds MIPI DSI Master and MIPI DSI-PHY (D-PHY)
support for Unisoc's display subsystem.

RFC v7:
  - Fix DTC unit name warnings
  - Fix the problem of maintainers

Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
---
 .../display/sprd/sprd,sharkl3-dsi-host.yaml        | 98 ++++++++++++++++++++++
 .../display/sprd/sprd,sharkl3-dsi-phy.yaml         | 75 +++++++++++++++++
 2 files changed, 173 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
 create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-phy.yaml

diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
new file mode 100644
index 0000000..b6bbf67
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
@@ -0,0 +1,98 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/sprd/sprd,sharkl3-dsi-host.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Unisoc MIPI DSI Controller
+
+maintainers:
+  - Kevin Tang <kevin.tang@unisoc.com>
+
+properties:
+  compatible:
+    const: sprd,sharkl3-dsi-host
+
+  reg:
+    maxItems: 1
+    description:
+      Physical base address and length of the registers set for the device.
+
+  interrupts:
+    maxItems: 2
+    description:
+      Should contain DSI interrupt.
+
+  clocks:
+    minItems: 1
+
+  clock-names:
+    items:
+      - const: clk_src_96m
+
+  power-domains:
+    maxItems: 1
+    description: A phandle to DSIM power domain node
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  port@0:
+    type: object
+    description:
+      A port node with endpoint definitions as defined in
+      Documentation/devicetree/bindings/media/video-interfaces.txt.
+      That port should be the input endpoint, usually coming from
+      the associated DPU.
+  port@1:
+    type: object
+    description:
+      A port node with endpoint definitions as defined in
+      Documentation/devicetree/bindings/media/video-interfaces.txt.
+      That port should be the output endpoint, usually output to
+      the associated DPHY.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - port@0
+  - port@1
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/sprd,sc9860-clk.h>
+    dsi: dsi@63100000 {
+        compatible = "sprd,sharkl3-dsi-host";
+        reg = <0x63100000 0x1000>;
+        interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>,
+          <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
+        clock-names = "clk_src_96m";
+        clocks = <&pll CLK_TWPLL_96M>;
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+        port@0 {
+            reg = <0>;
+            dsi_in: endpoint {
+                remote-endpoint = <&dpu_out>;
+            };
+        };
+
+        port@1 {
+            reg = <1>;
+            dsi_out: endpoint {
+                remote-endpoint = <&dphy_in>;
+            };
+        };
+    };
diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-phy.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-phy.yaml
new file mode 100644
index 0000000..0ab8c33
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-phy.yaml
@@ -0,0 +1,75 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/sprd/sprd,sharkl3-dsi-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Unisoc MIPI DSI-PHY (D-PHY)
+
+maintainers:
+  - Kevin Tang <kevin.tang@unisoc.com>
+
+properties:
+  compatible:
+    const: sprd,sharkl3-dsi-phy
+
+  reg:
+    maxItems: 1
+    description:
+      Must be the dsi controller base address.
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  port@0:
+    type: object
+    description:
+      A port node with endpoint definitions as defined in
+      Documentation/devicetree/bindings/media/video-interfaces.txt.
+      That port should be the output endpoint, usually output to
+      the associated panel.
+  port@1:
+    type: object
+    description:
+      A port node with endpoint definitions as defined in
+      Documentation/devicetree/bindings/media/video-interfaces.txt.
+      That port should be the input endpoint, usually coming from
+      the associated DSI controller.
+
+required:
+  - compatible
+  - reg
+  - port@0
+  - port@1
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    dphy: dphy@63100000 {
+        compatible = "sprd,sharkl3-dsi-phy";
+        reg = <0x63100000 0x1000>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        /* input port*/
+        port@1 {
+            reg = <1>;
+            dphy_in: endpoint {
+    	          remote-endpoint = <&dsi_out>;
+            };
+        };
+
+        /* output port */
+        port@0 {
+    	      reg = <0>;
+    	      dphy_out: endpoint {
+    		        remote-endpoint = <&panel_in>;
+    	      };
+        };
+    };
-- 
2.7.4

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Re: [PATCH RFC v7 5/6] dt-bindings: display: add Unisoc's mipi dsi&dphy bindings

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 2837 bytes --]

Hi!

On Mon, Sep 28, 2020 at 02:27:39PM +0800, Kevin Tang wrote:
> From: Kevin Tang <kevin.tang@unisoc.com>
> 
> Adds MIPI DSI Master and MIPI DSI-PHY (D-PHY)
> support for Unisoc's display subsystem.
> 
> RFC v7:
>   - Fix DTC unit name warnings
>   - Fix the problem of maintainers
> 
> Cc: Orson Zhai <orsonzhai@gmail.com>
> Cc: Chunyan Zhang <zhang.lyra@gmail.com>
> Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
> ---
>  .../display/sprd/sprd,sharkl3-dsi-host.yaml        | 98 ++++++++++++++++++++++
>  .../display/sprd/sprd,sharkl3-dsi-phy.yaml         | 75 +++++++++++++++++
>  2 files changed, 173 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
>  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-phy.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
> new file mode 100644
> index 0000000..b6bbf67
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
> @@ -0,0 +1,98 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/sprd/sprd,sharkl3-dsi-host.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Unisoc MIPI DSI Controller
> +
> +maintainers:
> +  - Kevin Tang <kevin.tang@unisoc.com>
> +
> +properties:
> +  compatible:
> +    const: sprd,sharkl3-dsi-host
> +
> +  reg:
> +    maxItems: 1
> +    description:
> +      Physical base address and length of the registers set for the device.
> +
> +  interrupts:
> +    maxItems: 2
> +    description:
> +      Should contain DSI interrupt.
> +
> +  clocks:
> +    minItems: 1
> +
> +  clock-names:
> +    items:
> +      - const: clk_src_96m
> +
> +  power-domains:
> +    maxItems: 1
> +    description: A phandle to DSIM power domain node
> +
> +  "#address-cells":
> +    const: 1
> +
> +  "#size-cells":
> +    const: 0
> +
> +  port@0:
> +    type: object
> +    description:
> +      A port node with endpoint definitions as defined in
> +      Documentation/devicetree/bindings/media/video-interfaces.txt.
> +      That port should be the input endpoint, usually coming from
> +      the associated DPU.
> +  port@1:
> +    type: object
> +    description:
> +      A port node with endpoint definitions as defined in
> +      Documentation/devicetree/bindings/media/video-interfaces.txt.
> +      That port should be the output endpoint, usually output to
> +      the associated DPHY.

Is there a specific reason you don't follow the OF-graph and have a
ports subnode with your two port@X in there?

Maxime

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Re: [PATCH RFC v7 5/6] dt-bindings: display: add Unisoc's mipi dsi&dphy bindings

[Maxime Ripard]

[-- Attachment #1.1: Type: text/plain, Size: 2837 bytes --]

Hi!

On Mon, Sep 28, 2020 at 02:27:39PM +0800, Kevin Tang wrote:
> From: Kevin Tang <kevin.tang@unisoc.com>
> 
> Adds MIPI DSI Master and MIPI DSI-PHY (D-PHY)
> support for Unisoc's display subsystem.
> 
> RFC v7:
>   - Fix DTC unit name warnings
>   - Fix the problem of maintainers
> 
> Cc: Orson Zhai <orsonzhai@gmail.com>
> Cc: Chunyan Zhang <zhang.lyra@gmail.com>
> Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
> ---
>  .../display/sprd/sprd,sharkl3-dsi-host.yaml        | 98 ++++++++++++++++++++++
>  .../display/sprd/sprd,sharkl3-dsi-phy.yaml         | 75 +++++++++++++++++
>  2 files changed, 173 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
>  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-phy.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
> new file mode 100644
> index 0000000..b6bbf67
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
> @@ -0,0 +1,98 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/sprd/sprd,sharkl3-dsi-host.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Unisoc MIPI DSI Controller
> +
> +maintainers:
> +  - Kevin Tang <kevin.tang@unisoc.com>
> +
> +properties:
> +  compatible:
> +    const: sprd,sharkl3-dsi-host
> +
> +  reg:
> +    maxItems: 1
> +    description:
> +      Physical base address and length of the registers set for the device.
> +
> +  interrupts:
> +    maxItems: 2
> +    description:
> +      Should contain DSI interrupt.
> +
> +  clocks:
> +    minItems: 1
> +
> +  clock-names:
> +    items:
> +      - const: clk_src_96m
> +
> +  power-domains:
> +    maxItems: 1
> +    description: A phandle to DSIM power domain node
> +
> +  "#address-cells":
> +    const: 1
> +
> +  "#size-cells":
> +    const: 0
> +
> +  port@0:
> +    type: object
> +    description:
> +      A port node with endpoint definitions as defined in
> +      Documentation/devicetree/bindings/media/video-interfaces.txt.
> +      That port should be the input endpoint, usually coming from
> +      the associated DPU.
> +  port@1:
> +    type: object
> +    description:
> +      A port node with endpoint definitions as defined in
> +      Documentation/devicetree/bindings/media/video-interfaces.txt.
> +      That port should be the output endpoint, usually output to
> +      the associated DPHY.

Is there a specific reason you don't follow the OF-graph and have a
ports subnode with your two port@X in there?

Maxime

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Re: [PATCH RFC v7 5/6] dt-bindings: display: add Unisoc's mipi dsi&dphy bindings

[Kevin Tang]

Hi maxime,
Sorry, I forgot to describe ports subnode with my two port@X, i will be fix it.

Thanks for reminding

Maxime Ripard <maxime@cerno.tech> 于2020年9月28日周一 下午4:20写道：
>
> Hi!
>
> On Mon, Sep 28, 2020 at 02:27:39PM +0800, Kevin Tang wrote:
> > From: Kevin Tang <kevin.tang@unisoc.com>
> >
> > Adds MIPI DSI Master and MIPI DSI-PHY (D-PHY)
> > support for Unisoc's display subsystem.
> >
> > RFC v7:
> >   - Fix DTC unit name warnings
> >   - Fix the problem of maintainers
> >
> > Cc: Orson Zhai <orsonzhai@gmail.com>
> > Cc: Chunyan Zhang <zhang.lyra@gmail.com>
> > Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
> > ---
> >  .../display/sprd/sprd,sharkl3-dsi-host.yaml        | 98 ++++++++++++++++++++++
> >  .../display/sprd/sprd,sharkl3-dsi-phy.yaml         | 75 +++++++++++++++++
> >  2 files changed, 173 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
> >  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-phy.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
> > new file mode 100644
> > index 0000000..b6bbf67
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
> > @@ -0,0 +1,98 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/display/sprd/sprd,sharkl3-dsi-host.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Unisoc MIPI DSI Controller
> > +
> > +maintainers:
> > +  - Kevin Tang <kevin.tang@unisoc.com>
> > +
> > +properties:
> > +  compatible:
> > +    const: sprd,sharkl3-dsi-host
> > +
> > +  reg:
> > +    maxItems: 1
> > +    description:
> > +      Physical base address and length of the registers set for the device.
> > +
> > +  interrupts:
> > +    maxItems: 2
> > +    description:
> > +      Should contain DSI interrupt.
> > +
> > +  clocks:
> > +    minItems: 1
> > +
> > +  clock-names:
> > +    items:
> > +      - const: clk_src_96m
> > +
> > +  power-domains:
> > +    maxItems: 1
> > +    description: A phandle to DSIM power domain node
> > +
> > +  "#address-cells":
> > +    const: 1
> > +
> > +  "#size-cells":
> > +    const: 0
> > +
> > +  port@0:
> > +    type: object
> > +    description:
> > +      A port node with endpoint definitions as defined in
> > +      Documentation/devicetree/bindings/media/video-interfaces.txt.
> > +      That port should be the input endpoint, usually coming from
> > +      the associated DPU.
> > +  port@1:
> > +    type: object
> > +    description:
> > +      A port node with endpoint definitions as defined in
> > +      Documentation/devicetree/bindings/media/video-interfaces.txt.
> > +      That port should be the output endpoint, usually output to
> > +      the associated DPHY.
>
> Is there a specific reason you don't follow the OF-graph and have a
> ports subnode with your two port@X in there?
>
> Maxime

Re: [PATCH RFC v7 5/6] dt-bindings: display: add Unisoc's mipi dsi&dphy bindings

[Kevin Tang]

Hi maxime,
Sorry, I forgot to describe ports subnode with my two port@X, i will be fix it.

Thanks for reminding

Maxime Ripard <maxime@cerno.tech> 于2020年9月28日周一 下午4:20写道：
>
> Hi!
>
> On Mon, Sep 28, 2020 at 02:27:39PM +0800, Kevin Tang wrote:
> > From: Kevin Tang <kevin.tang@unisoc.com>
> >
> > Adds MIPI DSI Master and MIPI DSI-PHY (D-PHY)
> > support for Unisoc's display subsystem.
> >
> > RFC v7:
> >   - Fix DTC unit name warnings
> >   - Fix the problem of maintainers
> >
> > Cc: Orson Zhai <orsonzhai@gmail.com>
> > Cc: Chunyan Zhang <zhang.lyra@gmail.com>
> > Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>
> > ---
> >  .../display/sprd/sprd,sharkl3-dsi-host.yaml        | 98 ++++++++++++++++++++++
> >  .../display/sprd/sprd,sharkl3-dsi-phy.yaml         | 75 +++++++++++++++++
> >  2 files changed, 173 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
> >  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-phy.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
> > new file mode 100644
> > index 0000000..b6bbf67
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
> > @@ -0,0 +1,98 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/display/sprd/sprd,sharkl3-dsi-host.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Unisoc MIPI DSI Controller
> > +
> > +maintainers:
> > +  - Kevin Tang <kevin.tang@unisoc.com>
> > +
> > +properties:
> > +  compatible:
> > +    const: sprd,sharkl3-dsi-host
> > +
> > +  reg:
> > +    maxItems: 1
> > +    description:
> > +      Physical base address and length of the registers set for the device.
> > +
> > +  interrupts:
> > +    maxItems: 2
> > +    description:
> > +      Should contain DSI interrupt.
> > +
> > +  clocks:
> > +    minItems: 1
> > +
> > +  clock-names:
> > +    items:
> > +      - const: clk_src_96m
> > +
> > +  power-domains:
> > +    maxItems: 1
> > +    description: A phandle to DSIM power domain node
> > +
> > +  "#address-cells":
> > +    const: 1
> > +
> > +  "#size-cells":
> > +    const: 0
> > +
> > +  port@0:
> > +    type: object
> > +    description:
> > +      A port node with endpoint definitions as defined in
> > +      Documentation/devicetree/bindings/media/video-interfaces.txt.
> > +      That port should be the input endpoint, usually coming from
> > +      the associated DPU.
> > +  port@1:
> > +    type: object
> > +    description:
> > +      A port node with endpoint definitions as defined in
> > +      Documentation/devicetree/bindings/media/video-interfaces.txt.
> > +      That port should be the output endpoint, usually output to
> > +      the associated DPHY.
>
> Is there a specific reason you don't follow the OF-graph and have a
> ports subnode with your two port@X in there?
>
> Maxime
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[PATCH RFC v7 6/6] drm/sprd: add Unisoc's drm mipi dsi&dphy driver

[Kevin Tang]

Adds dsi host controller support for the Unisoc's display subsystem.
Adds dsi phy support for the Unisoc's display subsystem.
Only MIPI DSI Displays supported, DP/TV/HMDI will be support
in the feature.

Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Kevin Tang <kevin3.tang@gmail.com>
---
 drivers/gpu/drm/sprd/Makefile          |    9 +-
 drivers/gpu/drm/sprd/dw_dsi_ctrl.c     |  792 +++++++++++++++++
 drivers/gpu/drm/sprd/dw_dsi_ctrl.h     | 1475 ++++++++++++++++++++++++++++++++
 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c |  276 ++++++
 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h |   34 +
 drivers/gpu/drm/sprd/megacores_pll.c   |  315 +++++++
 drivers/gpu/drm/sprd/megacores_pll.h   |  146 ++++
 drivers/gpu/drm/sprd/sprd_dphy.c       |  335 ++++++++
 drivers/gpu/drm/sprd/sprd_dphy.h       |   39 +
 drivers/gpu/drm/sprd/sprd_dpu.c        |   22 +
 drivers/gpu/drm/sprd/sprd_dpu.h        |    3 +
 drivers/gpu/drm/sprd/sprd_drm.c        |   40 +
 drivers/gpu/drm/sprd/sprd_drm.h        |    2 +
 drivers/gpu/drm/sprd/sprd_dsi.c        | 1102 ++++++++++++++++++++++++
 drivers/gpu/drm/sprd/sprd_dsi.h        |  105 +++
 15 files changed, 4693 insertions(+), 2 deletions(-)
 create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl.c
 create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl.h
 create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c
 create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h
 create mode 100644 drivers/gpu/drm/sprd/megacores_pll.c
 create mode 100644 drivers/gpu/drm/sprd/megacores_pll.h
 create mode 100644 drivers/gpu/drm/sprd/sprd_dphy.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_dphy.h
 create mode 100644 drivers/gpu/drm/sprd/sprd_dsi.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_dsi.h

diff --git a/drivers/gpu/drm/sprd/Makefile b/drivers/gpu/drm/sprd/Makefile
index 0ba48f2..75d6a519 100644
--- a/drivers/gpu/drm/sprd/Makefile
+++ b/drivers/gpu/drm/sprd/Makefile
@@ -1,7 +1,12 @@
 # SPDX-License-Identifier: GPL-2.0
 
 obj-y := sprd_drm.o \
-	sprd_dpu.o
+	sprd_dpu.o \
+	sprd_dsi.o \
+	sprd_dphy.o \
+	dpu_r2p0.o \
+	dw_dsi_ctrl.o \
+	dw_dsi_ctrl_ppi.o \
+	megacores_pll.o
 
-obj-y += dpu_r2p0.o
 
diff --git a/drivers/gpu/drm/sprd/dw_dsi_ctrl.c b/drivers/gpu/drm/sprd/dw_dsi_ctrl.c
new file mode 100644
index 0000000..1470d7d
--- /dev/null
+++ b/drivers/gpu/drm/sprd/dw_dsi_ctrl.c
@@ -0,0 +1,792 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+
+#include "dw_dsi_ctrl.h"
+
+/*
+ * Modify power status of DSI Host core
+ */
+void dsi_power_enable(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(enable, &reg->SOFT_RESET);
+}
+/*
+ * Enable/disable DPI video mode
+ */
+void dsi_video_mode(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(0, &reg->DSI_MODE_CFG);
+}
+/*
+ * Enable command mode (Generic interface)
+ */
+void dsi_cmd_mode(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(1, &reg->DSI_MODE_CFG);
+}
+
+bool dsi_is_cmd_mode(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	return readl(&reg->DSI_MODE_CFG);
+}
+/*
+ * Configure the read back virtual channel for the generic interface
+ */
+void dsi_rx_vcid(struct dsi_context *ctx, u8 vc)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x1C virtual_channel_id;
+
+	virtual_channel_id.val = readl(&reg->VIRTUAL_CHANNEL_ID);
+	virtual_channel_id.bits.gen_rx_vcid = vc;
+
+	writel(virtual_channel_id.val, &reg->VIRTUAL_CHANNEL_ID);
+}
+/*
+ * Write the DPI video virtual channel destination
+ */
+void dsi_video_vcid(struct dsi_context *ctx, u8 vc)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x1C virtual_channel_id;
+
+	virtual_channel_id.val = readl(&reg->VIRTUAL_CHANNEL_ID);
+	virtual_channel_id.bits.video_pkt_vcid = vc;
+
+	writel(virtual_channel_id.val, &reg->VIRTUAL_CHANNEL_ID);
+}
+/*
+ * Set DPI video mode type (burst/non-burst - with sync pulses or events)
+ */
+void dsi_dpi_video_burst_mode(struct dsi_context *ctx, int mode)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x38 vid_mode_cfg;
+
+	vid_mode_cfg.val = readl(&reg->VID_MODE_CFG);
+	vid_mode_cfg.bits.vid_mode_type = mode;
+
+	writel(vid_mode_cfg.val, &reg->VID_MODE_CFG);
+}
+/*
+ * Set DPI video color coding
+ */
+void dsi_dpi_color_coding(struct dsi_context *ctx, int coding)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x20 dpi_video_format;
+
+	dpi_video_format.val = readl(&reg->DPI_VIDEO_FORMAT);
+	dpi_video_format.bits.dpi_video_mode_format = coding;
+
+	writel(dpi_video_format.val, &reg->DPI_VIDEO_FORMAT);
+}
+/*
+ * Configure the Horizontal Line time
+ * param "byte_cycle" taken to transmit the total of the horizontal line
+ */
+void dsi_dpi_hline_time(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x2C video_line_time;
+
+	video_line_time.val = readl(&reg->VIDEO_LINE_TIME);
+	video_line_time.bits.video_line_time = byte_cycle;
+
+	writel(video_line_time.val, &reg->VIDEO_LINE_TIME);
+}
+/*
+ * Configure the Horizontal back porch time
+ * param "byte_cycle" taken to transmit the horizontal back porch
+ */
+void dsi_dpi_hbp_time(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x28 video_line_hblk_time;
+
+	video_line_hblk_time.val = readl(&reg->VIDEO_LINE_HBLK_TIME);
+	video_line_hblk_time.bits.video_line_hbp_time = byte_cycle;
+
+	writel(video_line_hblk_time.val, &reg->VIDEO_LINE_HBLK_TIME);
+}
+/*
+ * Configure the Horizontal sync time,
+ * param "byte_cycle" taken to transmit the horizontal sync
+ */
+void dsi_dpi_hsync_time(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x28 video_line_hblk_time;
+
+	video_line_hblk_time.val = readl(&reg->VIDEO_LINE_HBLK_TIME);
+	video_line_hblk_time.bits.video_line_hsa_time = byte_cycle;
+
+	writel(video_line_hblk_time.val, &reg->VIDEO_LINE_HBLK_TIME);
+}
+/*
+ * Configure the vertical active lines of the video stream
+ */
+void dsi_dpi_vact(struct dsi_context *ctx, u16 lines)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x34 video_active_lines;
+
+	video_active_lines.val = readl(&reg->VIDEO_VACTIVE_LINES);
+	video_active_lines.bits.vactive_lines = lines;
+
+	writel(video_active_lines.val, &reg->VIDEO_VACTIVE_LINES);
+}
+
+void dsi_dpi_vfp(struct dsi_context *ctx, u16 lines)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x30 video_vblk_lines;
+
+	video_vblk_lines.val = readl(&reg->VIDEO_VBLK_LINES);
+	video_vblk_lines.bits.vfp_lines = lines;
+
+	writel(video_vblk_lines.val, &reg->VIDEO_VBLK_LINES);
+}
+
+void dsi_dpi_vbp(struct dsi_context *ctx, u16 lines)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x30 video_vblk_lines;
+
+	video_vblk_lines.val = readl(&reg->VIDEO_VBLK_LINES);
+	video_vblk_lines.bits.vbp_lines = lines;
+
+	writel(video_vblk_lines.val, &reg->VIDEO_VBLK_LINES);
+}
+
+void dsi_dpi_vsync(struct dsi_context *ctx, u16 lines)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x30 video_vblk_lines;
+
+	video_vblk_lines.val = readl(&reg->VIDEO_VBLK_LINES);
+	video_vblk_lines.bits.vsa_lines = lines;
+
+	writel(video_vblk_lines.val, &reg->VIDEO_VBLK_LINES);
+}
+
+void dsi_dpi_hporch_lp_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x38 vid_mode_cfg;
+
+	vid_mode_cfg.val = readl(&reg->VID_MODE_CFG);
+
+	vid_mode_cfg.bits.lp_hfp_en = enable;
+	vid_mode_cfg.bits.lp_hbp_en = enable;
+
+	writel(vid_mode_cfg.val, &reg->VID_MODE_CFG);
+}
+/*
+ * Enable return to low power mode inside vertical active lines periods when
+ * timing allows
+ */
+void dsi_dpi_vporch_lp_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x38 vid_mode_cfg;
+
+	vid_mode_cfg.val = readl(&reg->VID_MODE_CFG);
+
+	vid_mode_cfg.bits.lp_vact_en = enable;
+	vid_mode_cfg.bits.lp_vfp_en = enable;
+	vid_mode_cfg.bits.lp_vbp_en = enable;
+	vid_mode_cfg.bits.lp_vsa_en = enable;
+
+	writel(vid_mode_cfg.val, &reg->VID_MODE_CFG);
+}
+/*
+ * Enable FRAME BTA ACK
+ */
+void dsi_dpi_frame_ack_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x38 vid_mode_cfg;
+
+	vid_mode_cfg.val = readl(&reg->VID_MODE_CFG);
+	vid_mode_cfg.bits.frame_bta_ack_en = enable;
+
+	writel(vid_mode_cfg.val, &reg->VID_MODE_CFG);
+}
+/*
+ * Write no of chunks to core - taken into consideration only when multi packet
+ * is enabled
+ */
+void dsi_dpi_chunk_num(struct dsi_context *ctx, u16 num)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x24 video_pkt_config;
+
+	video_pkt_config.val = readl(&reg->VIDEO_PKT_CONFIG);
+	video_pkt_config.bits.video_line_chunk_num = num;
+
+	writel(video_pkt_config.val, &reg->VIDEO_PKT_CONFIG);
+}
+/*
+ * Write the null packet size - will only be taken into account when null
+ * packets are enabled.
+ */
+void dsi_dpi_null_packet_size(struct dsi_context *ctx, u16 size)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xC0 video_nullpkt_size;
+
+	video_nullpkt_size.val = readl(&reg->VIDEO_NULLPKT_SIZE);
+	video_nullpkt_size.bits.video_nullpkt_size = size;
+
+	writel(video_nullpkt_size.val, &reg->VIDEO_NULLPKT_SIZE);
+}
+/*
+ * Write video packet size. obligatory for sending video
+ */
+void dsi_dpi_video_packet_size(struct dsi_context *ctx, u16 size)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x24 video_pkt_config;
+
+	video_pkt_config.val = readl(&reg->VIDEO_PKT_CONFIG);
+	video_pkt_config.bits.video_pkt_size = size;
+
+	writel(video_pkt_config.val, &reg->VIDEO_PKT_CONFIG);
+}
+/*
+ * Specifiy the size of the packet memory write start/continue
+ */
+void dsi_edpi_max_pkt_size(struct dsi_context *ctx, u16 size)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xC4 dcs_wm_pkt_size;
+
+	dcs_wm_pkt_size.val = readl(&reg->DCS_WM_PKT_SIZE);
+	dcs_wm_pkt_size.bits.dcs_wm_pkt_size = size;
+
+	writel(dcs_wm_pkt_size.val, &reg->DCS_WM_PKT_SIZE);
+}
+/*
+ * Enable tear effect acknowledge
+ */
+void dsi_tear_effect_ack_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x68 cmd_mode_cfg;
+
+	cmd_mode_cfg.val = readl(&reg->CMD_MODE_CFG);
+	cmd_mode_cfg.bits.tear_fx_en = enable;
+
+	writel(cmd_mode_cfg.val, &reg->CMD_MODE_CFG);
+}
+/*
+ * Set DCS command packet transmission to transmission type
+ */
+void dsi_cmd_mode_lp_cmd_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x68 cmd_mode_cfg;
+
+	cmd_mode_cfg.val = readl(&reg->CMD_MODE_CFG);
+
+	cmd_mode_cfg.bits.gen_sw_0p_tx = enable;
+	cmd_mode_cfg.bits.gen_sw_1p_tx = enable;
+	cmd_mode_cfg.bits.gen_sw_2p_tx = enable;
+	cmd_mode_cfg.bits.gen_lw_tx = enable;
+	cmd_mode_cfg.bits.dcs_sw_0p_tx = enable;
+	cmd_mode_cfg.bits.dcs_sw_1p_tx = enable;
+	cmd_mode_cfg.bits.dcs_lw_tx = enable;
+	cmd_mode_cfg.bits.max_rd_pkt_size = enable;
+
+	cmd_mode_cfg.bits.gen_sr_0p_tx = enable;
+	cmd_mode_cfg.bits.gen_sr_1p_tx = enable;
+	cmd_mode_cfg.bits.gen_sr_2p_tx = enable;
+	cmd_mode_cfg.bits.dcs_sr_0p_tx = enable;
+
+	writel(cmd_mode_cfg.val, &reg->CMD_MODE_CFG);
+}
+/*
+ * Set DCS read command packet transmission to transmission type
+ */
+void dsi_video_mode_lp_cmd_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x38 vid_mode_cfg;
+
+	vid_mode_cfg.val = readl(&reg->VID_MODE_CFG);
+	vid_mode_cfg.bits.lp_cmd_en = enable;
+
+	writel(vid_mode_cfg.val, &reg->VID_MODE_CFG);
+}
+
+/*
+ * Write command header in the generic interface (which also sends DCS commands) as a subset
+ */
+void dsi_set_packet_header(struct dsi_context *ctx,
+				   u8 vc,
+				   u8 type,
+				   u8 wc_lsb,
+				   u8 wc_msb)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x6C gen_hdr;
+
+	gen_hdr.bits.gen_dt = type;
+	gen_hdr.bits.gen_vc = vc;
+	gen_hdr.bits.gen_wc_lsbyte = wc_lsb;
+	gen_hdr.bits.gen_wc_msbyte = wc_msb;
+
+	writel(gen_hdr.val, &reg->GEN_HDR);
+}
+/*
+ * Write the payload of the long packet commands
+ */
+void dsi_set_packet_payload(struct dsi_context *ctx, u32 payload)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(payload, &reg->GEN_PLD_DATA);
+}
+/*
+ * Read the payload of the long packet commands
+ */
+u32 dsi_get_rx_payload(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	return readl(&reg->GEN_PLD_DATA);
+}
+
+/*
+ * Enable Bus Turn-around request
+ */
+void dsi_bta_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(enable, &reg->TA_EN);
+}
+/*
+ * Enable EOTp reception
+ */
+void dsi_eotp_rx_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xBC eotp_en;
+
+	eotp_en.val = readl(&reg->EOTP_EN);
+	eotp_en.bits.rx_eotp_en = enable;
+
+	writel(eotp_en.val, &reg->EOTP_EN);
+}
+/*
+ * Enable EOTp transmission
+ */
+void dsi_eotp_tx_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xBC eotp_en;
+
+	eotp_en.val = readl(&reg->EOTP_EN);
+	eotp_en.bits.tx_eotp_en = enable;
+
+	writel(eotp_en.val, &reg->EOTP_EN);
+}
+/*
+ * Enable ECC reception, error correction and reporting
+ */
+void dsi_ecc_rx_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xB4 rx_pkt_check_config;
+
+	rx_pkt_check_config.val = readl(&reg->RX_PKT_CHECK_CONFIG);
+	rx_pkt_check_config.bits.rx_pkt_ecc_en = enable;
+
+	writel(rx_pkt_check_config.val, &reg->RX_PKT_CHECK_CONFIG);
+}
+/*
+ * Enable CRC reception, error reporting
+ */
+void dsi_crc_rx_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xB4 rx_pkt_check_config;
+
+	rx_pkt_check_config.val = readl(&reg->RX_PKT_CHECK_CONFIG);
+	rx_pkt_check_config.bits.rx_pkt_crc_en = enable;
+
+	writel(rx_pkt_check_config.val, &reg->RX_PKT_CHECK_CONFIG);
+}
+/*
+ * Get status of read command
+ */
+bool dsi_is_bta_returned(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x98 cmd_mode_status;
+
+	cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS);
+
+	return cmd_mode_status.bits.gen_cmd_rdcmd_done;
+}
+/*
+ * Get the FULL status of generic read payload fifo
+ */
+bool dsi_is_rx_payload_fifo_full(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x98 cmd_mode_status;
+
+	cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS);
+
+	return cmd_mode_status.bits.gen_cmd_rdata_fifo_full;
+}
+/*
+ * Get the EMPTY status of generic read payload fifo
+ */
+bool dsi_is_rx_payload_fifo_empty(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x98 cmd_mode_status;
+
+	cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS);
+
+	return cmd_mode_status.bits.gen_cmd_rdata_fifo_empty;
+}
+/*
+ * Get the FULL status of generic write payload fifo
+ */
+bool dsi_is_tx_payload_fifo_full(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x98 cmd_mode_status;
+
+	cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS);
+
+	return cmd_mode_status.bits.gen_cmd_wdata_fifo_full;
+}
+/*
+ * Get the EMPTY status of generic write payload fifo
+ */
+bool dsi_is_tx_payload_fifo_empty(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x98 cmd_mode_status;
+
+	cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS);
+
+	return cmd_mode_status.bits.gen_cmd_wdata_fifo_empty;
+}
+/*
+ * Get the EMPTY status of generic command fifo
+ */
+bool dsi_is_tx_cmd_fifo_empty(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x98 cmd_mode_status;
+
+	cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS);
+
+	return cmd_mode_status.bits.gen_cmd_cmd_fifo_empty;
+}
+/*
+ * DPI interface signal delay config
+ * param byte_cycle period for waiting after controller receiving HSYNC from
+ * DPI interface to start read pixel data from memory.
+ */
+void dsi_dpi_sig_delay(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xD0 video_sig_delay_config;
+
+	video_sig_delay_config.val = readl(&reg->VIDEO_SIG_DELAY_CONFIG);
+	video_sig_delay_config.bits.video_sig_delay = byte_cycle;
+
+	writel(video_sig_delay_config.val, &reg->VIDEO_SIG_DELAY_CONFIG);
+}
+/*
+ * Configure how many cycles of byte clock would the PHY module take
+ * to switch data lane from high speed to low power
+ */
+void dsi_datalane_hs2lp_config(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xAC phy_datalane_time_config;
+
+	phy_datalane_time_config.val = readl(&reg->PHY_DATALANE_TIME_CONFIG);
+	phy_datalane_time_config.bits.phy_datalane_hs_to_lp_time = byte_cycle;
+
+	writel(phy_datalane_time_config.val, &reg->PHY_DATALANE_TIME_CONFIG);
+}
+/*
+ * Configure how many cycles of byte clock would the PHY module take
+ * to switch the data lane from to low power high speed
+ */
+void dsi_datalane_lp2hs_config(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xAC phy_datalane_time_config;
+
+	phy_datalane_time_config.val = readl(&reg->PHY_DATALANE_TIME_CONFIG);
+	phy_datalane_time_config.bits.phy_datalane_lp_to_hs_time = byte_cycle;
+
+	writel(phy_datalane_time_config.val, &reg->PHY_DATALANE_TIME_CONFIG);
+}
+/*
+ * Configure how many cycles of byte clock would the PHY module take
+ * to switch clock lane from high speed to low power
+ */
+void dsi_clklane_hs2lp_config(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xA8 phy_clklane_time_config;
+
+	phy_clklane_time_config.val = readl(&reg->PHY_CLKLANE_TIME_CONFIG);
+	phy_clklane_time_config.bits.phy_clklane_hs_to_lp_time = byte_cycle;
+
+	writel(phy_clklane_time_config.val, &reg->PHY_CLKLANE_TIME_CONFIG);
+}
+/*
+ * Configure how many cycles of byte clock would the PHY module take
+ * to switch clock lane from to low power high speed
+ */
+void dsi_clklane_lp2hs_config(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xA8 phy_clklane_time_config;
+
+	phy_clklane_time_config.val = readl(&reg->PHY_CLKLANE_TIME_CONFIG);
+	phy_clklane_time_config.bits.phy_clklane_lp_to_hs_time = byte_cycle;
+
+	writel(phy_clklane_time_config.val, &reg->PHY_CLKLANE_TIME_CONFIG);
+}
+/*
+ * Configure how many cycles of byte clock would the PHY module take
+ * to turn the bus around to start receiving
+ */
+void dsi_max_read_time(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(byte_cycle, &reg->MAX_READ_TIME);
+}
+/*
+ * Enable the automatic mechanism to stop providing clock in the clock
+ * lane when time allows
+ */
+void dsi_nc_clk_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x74 phy_clk_lane_lp_ctrl;
+
+	phy_clk_lane_lp_ctrl.val = readl(&reg->PHY_CLK_LANE_LP_CTRL);
+	phy_clk_lane_lp_ctrl.bits.auto_clklane_ctrl_en = enable;
+
+	writel(phy_clk_lane_lp_ctrl.val, &reg->PHY_CLK_LANE_LP_CTRL);
+}
+/*
+ * Write transmission escape timeout
+ * a safe guard so that the state machine would reset if transmission
+ * takes too long
+ */
+void dsi_tx_escape_division(struct dsi_context *ctx, u8 div)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(div, &reg->TX_ESC_CLK_CONFIG);
+}
+/* 
+ * Configure timeout divisions (so they would have more clock ticks)
+ * div no of hs cycles before transiting back to LP in
+ *  (lane_clk / div)
+ */
+void dsi_timeout_clock_division(struct dsi_context *ctx, u8 div)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(div, &reg->TIMEOUT_CNT_CLK_CONFIG);
+}
+/*
+ * Configure the Low power receive time out
+ */
+void dsi_lp_rx_timeout(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(byte_cycle, &reg->LRX_H_TO_CONFIG);
+}
+/*
+ * Configure a high speed transmission time out
+ */
+void dsi_hs_tx_timeout(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(byte_cycle, &reg->HTX_TO_CONFIG);
+}
+/*
+ * Get the error 0 interrupt register status
+ */
+u32 dsi_int0_status(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x08 protocol_int_sts;
+
+	protocol_int_sts.val = readl(&reg->PROTOCOL_INT_STS);
+	writel(protocol_int_sts.val, &reg->PROTOCOL_INT_CLR);
+
+	if (protocol_int_sts.bits.dphy_errors_0)
+		DRM_ERROR("dphy_err: escape entry error\n");
+
+	if (protocol_int_sts.bits.dphy_errors_1)
+		DRM_ERROR("dphy_err: lp data transmission sync error\n");
+
+	if (protocol_int_sts.bits.dphy_errors_2)
+		DRM_ERROR("dphy_err: control error\n");
+
+	if (protocol_int_sts.bits.dphy_errors_3)
+		DRM_ERROR("dphy_err: LP0 contention error\n");
+
+	if (protocol_int_sts.bits.dphy_errors_4)
+		DRM_ERROR("dphy_err: LP1 contention error\n");
+
+	if (protocol_int_sts.bits.ack_with_err_0)
+		DRM_ERROR("ack_err: SoT error\n");
+
+	if (protocol_int_sts.bits.ack_with_err_1)
+		DRM_ERROR("ack_err: SoT Sync error\n");
+
+	if (protocol_int_sts.bits.ack_with_err_2)
+		DRM_ERROR("ack_err: EoT Sync error\n");
+
+	if (protocol_int_sts.bits.ack_with_err_3)
+		DRM_ERROR("ack_err: Escape Mode Entry Command error\n");
+
+	if (protocol_int_sts.bits.ack_with_err_4)
+		DRM_ERROR("ack_err: LP Transmit Sync error\n");
+
+	if (protocol_int_sts.bits.ack_with_err_5)
+		DRM_ERROR("ack_err: Peripheral Timeout error\n");
+
+	if (protocol_int_sts.bits.ack_with_err_6)
+		DRM_ERROR("ack_err: False Control error\n");
+
+	if (protocol_int_sts.bits.ack_with_err_7)
+		DRM_ERROR("ack_err: reserved (specific to device)\n");
+
+	if (protocol_int_sts.bits.ack_with_err_8)
+		DRM_ERROR("ack_err: ECC error, single-bit (corrected)\n");
+
+	if (protocol_int_sts.bits.ack_with_err_9)
+		DRM_ERROR("ack_err: ECC error, multi-bit (not corrected)\n");
+
+	if (protocol_int_sts.bits.ack_with_err_10)
+		DRM_ERROR("ack_err: checksum error (long packet only)\n");
+
+	if (protocol_int_sts.bits.ack_with_err_11)
+		DRM_ERROR("ack_err: not recognized DSI data type\n");
+
+	if (protocol_int_sts.bits.ack_with_err_12)
+		DRM_ERROR("ack_err: DSI VC ID Invalid\n");
+
+	if (protocol_int_sts.bits.ack_with_err_13)
+		DRM_ERROR("ack_err: invalid transmission length\n");
+
+	if (protocol_int_sts.bits.ack_with_err_14)
+		DRM_ERROR("ack_err: reserved (specific to device)\n");
+
+	if (protocol_int_sts.bits.ack_with_err_15)
+		DRM_ERROR("ack_err: DSI protocol violation\n");
+
+	return 0;
+}
+/*
+ * Get the error 1 interrupt register status
+ */
+u32 dsi_int1_status(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x10 internal_int_sts;
+	u32 status = 0;
+
+	internal_int_sts.val = readl(&reg->INTERNAL_INT_STS);
+	writel(internal_int_sts.val, &reg->INTERNAL_INT_CLR);
+
+	if (internal_int_sts.bits.receive_pkt_size_err)
+		DRM_ERROR("receive packet size error\n");
+
+	if (internal_int_sts.bits.eotp_not_receive_err)
+		DRM_ERROR("EoTp packet is not received\n");
+
+	if (internal_int_sts.bits.gen_cmd_cmd_fifo_wr_err)
+		DRM_ERROR("cmd header-fifo is full\n");
+
+	if (internal_int_sts.bits.gen_cmd_rdata_fifo_rd_err)
+		DRM_ERROR("cmd read-payload-fifo is empty\n");
+
+	if (internal_int_sts.bits.gen_cmd_rdata_fifo_wr_err)
+		DRM_ERROR("cmd read-payload-fifo is full\n");
+
+	if (internal_int_sts.bits.gen_cmd_wdata_fifo_wr_err)
+		DRM_ERROR("cmd write-payload-fifo is full\n");
+
+	if (internal_int_sts.bits.gen_cmd_wdata_fifo_rd_err)
+		DRM_ERROR("cmd write-payload-fifo is empty\n");
+
+	if (internal_int_sts.bits.dpi_pix_fifo_wr_err) {
+		DRM_ERROR("DPI pixel-fifo is full\n");
+		status |= DSI_INT_STS_NEED_SOFT_RESET;
+	}
+
+	if (internal_int_sts.bits.ecc_single_err)
+		DRM_ERROR("ECC single error in a received packet\n");
+
+	if (internal_int_sts.bits.ecc_multi_err)
+		DRM_ERROR("ECC multiple error in a received packet\n");
+
+	if (internal_int_sts.bits.crc_err)
+		DRM_ERROR("CRC error in the received packet payload\n");
+
+	if (internal_int_sts.bits.hs_tx_timeout)
+		DRM_ERROR("high-speed transmission timeout\n");
+
+	if (internal_int_sts.bits.lp_rx_timeout)
+		DRM_ERROR("low-power reception timeout\n");
+
+	return status;
+}
+/*
+ * Configure MASK (hiding) of interrupts coming from error 0 source
+ */
+void dsi_int0_mask(struct dsi_context *ctx, u32 mask)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(mask, &reg->MASK_PROTOCOL_INT);
+}
+/*
+ * Configure MASK (hiding) of interrupts coming from error 1 source
+ */
+void dsi_int1_mask(struct dsi_context *ctx, u32 mask)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(mask, &reg->MASK_INTERNAL_INT);
+}
diff --git a/drivers/gpu/drm/sprd/dw_dsi_ctrl.h b/drivers/gpu/drm/sprd/dw_dsi_ctrl.h
new file mode 100644
index 0000000..ffba621
--- /dev/null
+++ b/drivers/gpu/drm/sprd/dw_dsi_ctrl.h
@@ -0,0 +1,1475 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#ifndef _DW_DSI_CTRL_H_
+#define _DW_DSI_CTRL_H_
+
+#include <asm/types.h>
+
+#include "sprd_dsi.h"
+
+struct dsi_reg {
+	union _0x00 {
+		u32 val;
+		struct _DSI_VERSION {
+		u32 dsi_version: 16;
+		u32 reserved: 16;
+		} bits;
+	} DSI_VERSION;
+
+	union _0x04 {
+		u32 val;
+		struct _SOFT_RESET {
+		/*
+		 * This bit configures the core either to work normal or to
+		 * reset. It's default value is 0. After the core configur-
+		 * ation, to enable the mipi_dsi_host, set this register to 1.
+		 * 1: power up     0: reset core
+		 */
+		u32 dsi_soft_reset: 1;
+
+		u32 reserved: 31;
+		} bits;
+	} SOFT_RESET;
+
+	union _0x08 {
+		u32 val;
+		struct _PROTOCOL_INT_STS {
+		/* ErrEsc escape entry error from Lane 0 */
+		u32 dphy_errors_0: 1;
+
+		/* ErrSyncEsc low-power data transmission synchronization
+		 * error from Lane 0
+		 */
+		u32 dphy_errors_1: 1;
+
+		/* ErrControl error from Lane 0 */
+		u32 dphy_errors_2: 1;
+
+		/* ErrContentionLP0 LP0 contention error from Lane 0 */
+		u32 dphy_errors_3: 1;
+
+		/* ErrContentionLP1 LP1 contention error from Lane 0 */
+		u32 dphy_errors_4: 1;
+
+		/* debug mode protocol errors */
+		u32 protocol_debug_err: 11;
+
+		/* SoT error from the Acknowledge error report */
+		u32 ack_with_err_0: 1;
+
+		/* SoT Sync error from the Acknowledge error report */
+		u32 ack_with_err_1: 1;
+
+		/* EoT Sync error from the Acknowledge error report */
+		u32 ack_with_err_2: 1;
+
+		/* Escape Mode Entry Command error from the Acknowledge
+		 * error report
+		 */
+		u32 ack_with_err_3: 1;
+
+		/* LP Transmit Sync error from the Acknowledge error report */
+		u32 ack_with_err_4: 1;
+
+		/* Peripheral Timeout error from the Acknowledge error report */
+		u32 ack_with_err_5: 1;
+
+		/* False Control error from the Acknowledge error report */
+		u32 ack_with_err_6: 1;
+
+		/* reserved (specific to device) from the Acknowledge error
+		 * report
+		 */
+		u32 ack_with_err_7: 1;
+
+		/* ECC error, single-bit (detected and corrected) from the
+		 * Acknowledge error report
+		 */
+		u32 ack_with_err_8: 1;
+
+		/* ECC error, multi-bit (detected, not corrected) from the
+		 * Acknowledge error report
+		 */
+		u32 ack_with_err_9: 1;
+
+		/* checksum error (long packet only) from the Acknowledge
+		 * error report
+		 */
+		u32 ack_with_err_10: 1;
+
+		/* not recognized DSI data type from the Acknowledge error
+		 * report
+		 */
+		u32 ack_with_err_11: 1;
+
+		/* DSI VC ID Invalid from the Acknowledge error report */
+		u32 ack_with_err_12: 1;
+
+		/* invalid transmission length from the Acknowledge error
+		 * report
+		 */
+		u32 ack_with_err_13: 1;
+
+		/* reserved (specific to device) from the Acknowledge error
+		 * report
+		 */
+		u32 ack_with_err_14: 1;
+
+		/* DSI protocol violation from the Acknowledge error report */
+		u32 ack_with_err_15: 1;
+
+		} bits;
+	} PROTOCOL_INT_STS;
+
+	union _0x0C {
+		u32 val;
+		struct _MASK_PROTOCOL_INT {
+		u32 mask_dphy_errors_0: 1;
+		u32 mask_dphy_errors_1: 1;
+		u32 mask_dphy_errors_2: 1;
+		u32 mask_dphy_errors_3: 1;
+		u32 mask_dphy_errors_4: 1;
+		u32 mask_protocol_debug_err: 11;
+		u32 mask_ack_with_err_0: 1;
+		u32 mask_ack_with_err_1: 1;
+		u32 mask_ack_with_err_2: 1;
+		u32 mask_ack_with_err_3: 1;
+		u32 mask_ack_with_err_4: 1;
+		u32 mask_ack_with_err_5: 1;
+		u32 mask_ack_with_err_6: 1;
+		u32 mask_ack_with_err_7: 1;
+		u32 mask_ack_with_err_8: 1;
+		u32 mask_ack_with_err_9: 1;
+		u32 mask_ack_with_err_10: 1;
+		u32 mask_ack_with_err_11: 1;
+		u32 mask_ack_with_err_12: 1;
+		u32 mask_ack_with_err_13: 1;
+		u32 mask_ack_with_err_14: 1;
+		u32 mask_ack_with_err_15: 1;
+		} bits;
+	} MASK_PROTOCOL_INT;
+
+	union _0x10 {
+		u32 val;
+		struct _INTERNAL_INT_STS {
+		/* This bit indicates that the packet size error is detected
+		 * during the packet reception.
+		 */
+		u32 receive_pkt_size_err: 1;
+
+		/* This bit indicates that the EoTp packet is not received at
+		 * the end of the incoming peripheral transmission
+		 */
+		u32 eotp_not_receive_err: 1;
+
+		/* This bit indicates that the system tried to write a command
+		 * through the Generic interface and the FIFO is full. There-
+		 * fore, the command is not written.
+		 */
+		u32 gen_cmd_cmd_fifo_wr_err: 1;
+
+		/* This bit indicates that during a DCS read data, the payload
+		 * FIFO becomes	empty and the data sent to the interface is
+		 * corrupted.
+		 */
+		u32 gen_cmd_rdata_fifo_rd_err: 1;
+
+		/* This bit indicates that during a generic interface packet
+		 * read back, the payload FIFO becomes full and the received
+		 * data is corrupted.
+		 */
+		u32 gen_cmd_rdata_fifo_wr_err: 1;
+
+		/* This bit indicates that the system tried to write a payload
+		 * data through the Generic interface and the FIFO is full.
+		 * Therefore, the payload is not written.
+		 */
+		u32 gen_cmd_wdata_fifo_wr_err: 1;
+
+		/* This bit indicates that during a Generic interface packet
+		 * build, the payload FIFO becomes empty and corrupt data is
+		 * sent.
+		 */
+		u32 gen_cmd_wdata_fifo_rd_err: 1;
+
+		/* This bit indicates that during a DPI pixel line storage,
+		 * the payload FIFO becomes full and the data stored is
+		 * corrupted.
+		 */
+		u32 dpi_pix_fifo_wr_err: 1;
+
+		/* internal debug error	*/
+		u32 internal_debug_err: 19;
+
+		/* This bit indicates that the ECC single error is detected
+		 * and corrected in a received packet.
+		 */
+		u32 ecc_single_err: 1;
+
+		/* This bit indicates that the ECC multiple error is detected
+		 * in a received packet.
+		 */
+		u32 ecc_multi_err: 1;
+
+		/* This bit indicates that the CRC error is detected in the
+		 * received packet payload.
+		 */
+		u32 crc_err: 1;
+
+		/* This bit indicates that the high-speed transmission timeout
+		 * counter reached the end and contention is detected.
+		 */
+		u32 hs_tx_timeout: 1;
+
+		/* This bit indicates that the low-power reception timeout
+		 * counter reached the end and contention is detected.
+		 */
+		u32 lp_rx_timeout: 1;
+
+		} bits;
+	} INTERNAL_INT_STS;
+
+	union _0x14 {
+		u32 val;
+		struct _MASK_INTERNAL_INT {
+		u32 mask_receive_pkt_size_err: 1;
+		u32 mask_eopt_not_receive_err: 1;
+		u32 mask_gen_cmd_cmd_fifo_wr_err: 1;
+		u32 mask_gen_cmd_rdata_fifo_rd_err: 1;
+		u32 mask_gen_cmd_rdata_fifo_wr_err: 1;
+		u32 mask_gen_cmd_wdata_fifo_wr_err: 1;
+		u32 mask_gen_cmd_wdata_fifo_rd_err: 1;
+		u32 mask_dpi_pix_fifo_wr_err: 1;
+		u32 mask_internal_debug_err: 19;
+		u32 mask_ecc_single_err: 1;
+		u32 mask_ecc_multi_err: 1;
+		u32 mask_crc_err: 1;
+		u32 mask_hs_tx_timeout: 1;
+		u32 mask_lp_rx_timeout: 1;
+		} bits;
+	} MASK_INTERNAL_INT;
+
+	union _0x18 {
+		u32 val;
+		struct _DSI_MODE_CFG {
+		/* This bit configures the operation mode
+		 * 0: Video mode ;   1: Command mode
+		 */
+		u32 cmd_video_mode: 1;
+
+		u32 reserved: 31;
+
+		} bits;
+	} DSI_MODE_CFG;
+
+	union _0x1C {
+		u32 val;
+		struct _VIRTUAL_CHANNEL_ID {
+		/* This field indicates the Generic interface read-back
+		 * virtual channel identification
+		 */
+		u32 gen_rx_vcid: 2;
+
+		/* This field configures the DPI virtual channel id that
+		 * is indexed to the VIDEO mode packets
+		 */
+		u32 video_pkt_vcid: 2;
+
+		u32 reserved: 28;
+
+		} bits;
+	} VIRTUAL_CHANNEL_ID;
+
+	union _0x20 {
+		u32 val;
+		struct _DPI_VIDEO_FORMAT {
+		/*
+		 * This field configures the DPI color coding as follows:
+		 * 0000: 16-bit configuration 1
+		 * 0001: 16-bit configuration 2
+		 * 0010: 16-bit configuration 3
+		 * 0011: 18-bit configuration 1
+		 * 0100: 18-bit configuration 2
+		 * 0101: 24-bit
+		 * 0110: 20-bit YCbCr 4:2:2 loosely packed
+		 * 0111: 24-bit YCbCr 4:2:2
+		 * 1000: 16-bit YCbCr 4:2:2
+		 * 1001: 30-bit
+		 * 1010: 36-bit
+		 * 1011: 12-bit YCbCr 4:2:0
+		 * 1100: Compression Display Stream
+		 * 1101-1111: 12-bit YCbCr 4:2:0
+		 */
+		u32 dpi_video_mode_format: 6;
+
+		/* When set to 1, this bit activates loosely packed
+		 * variant to 18-bit configurations
+		 */
+		u32 loosely18_en: 1;
+
+		u32 reserved: 25;
+
+		} bits;
+	} DPI_VIDEO_FORMAT;
+
+	union _0x24 {
+		u32 val;
+		struct _VIDEO_PKT_CONFIG {
+		/*
+		 * This field configures the number of pixels in a single
+		 * video packet. For 18-bit not loosely packed data types,
+		 * this number must be a multiple of 4. For YCbCr data
+		 * types, it must be a multiple of 2, as described in the
+		 * DSI specification.
+		 */
+		u32 video_pkt_size: 16;
+
+		/*
+		 * This register configures the number of chunks to be
+		 * transmitted during a Line period (a chunk consists of
+		 * a video packet and a null packet). If set to 0 or 1,
+		 * the video line is transmitted in a single packet. If
+		 * set to 1, the packet is part of a chunk, so a null packet
+		 * follows it if vid_null_size > 0. Otherwise, multiple chunks
+		 * are used to transmit each video line.
+		 */
+		u32 video_line_chunk_num: 16;
+
+		} bits;
+	} VIDEO_PKT_CONFIG;
+
+	union _0x28 {
+		u32 val;
+		struct _VIDEO_LINE_HBLK_TIME {
+		/* This field configures the Horizontal Back Porch period
+		 * in lane byte clock cycles
+		 */
+		u32 video_line_hbp_time: 16;
+
+		/* This field configures the Horizontal Synchronism Active
+		 * period in lane byte clock cycles
+		 */
+		u32 video_line_hsa_time: 16;
+
+		} bits;
+	} VIDEO_LINE_HBLK_TIME;
+
+	union _0x2C {
+		u32 val;
+		struct _VIDEO_LINE_TIME {
+		/* This field configures the size of the total line time
+		 * (HSA+HBP+HACT+HFP) counted in lane byte clock cycles
+		 */
+		u32 video_line_time: 16;
+
+		u32 reserved: 16;
+
+		} bits;
+	} VIDEO_LINE_TIME;
+
+	union _0x30 {
+		u32 val;
+		struct _VIDEO_VBLK_LINES {
+		/* This field configures the Vertical Front Porch period
+		 * measured in number of horizontal lines
+		 */
+		u32 vfp_lines: 10;
+
+		/* This field configures the Vertical Back Porch period
+		 * measured in number of horizontal lines
+		 */
+		u32 vbp_lines: 10;
+
+		/* This field configures the Vertical Synchronism Active
+		 * period measured in number of horizontal lines
+		 */
+		u32 vsa_lines: 10;
+
+		u32 reserved: 2;
+
+		} bits;
+	} VIDEO_VBLK_LINES;
+
+	union _0x34 {
+		u32 val;
+		struct _VIDEO_VACTIVE_LINES {
+		/* This field configures the Vertical Active period measured
+		 * in number of horizontal lines
+		 */
+		u32 vactive_lines: 14;
+
+		u32 reserved: 18;
+
+		} bits;
+	} VIDEO_VACTIVE_LINES;
+
+	union _0x38 {
+		u32 val;
+		struct _VID_MODE_CFG {
+		/*
+		 * This field indicates the video mode transmission type as
+		 * follows:
+		 * 00: Non-burst with sync pulses
+		 * 01: Non-burst with sync events
+		 * 10 and 11: Burst mode
+		 */
+		u32 vid_mode_type: 2;
+
+		u32 reserved_0: 6;
+
+		/* When set to 1, this bit enables the return to low-power
+		 * inside the VSA period when timing allows.
+		 */
+		u32 lp_vsa_en: 1;
+
+		/* When set to 1, this bit enables the return to low-power
+		 * inside the VBP period when timing allows.
+		 */
+		u32 lp_vbp_en: 1;
+
+		/* When set to 1, this bit enables the return to low-power
+		 * inside the VFP period when timing allows.
+		 */
+		u32 lp_vfp_en: 1;
+
+		/* When set to 1, this bit enables the return to low-power
+		 * inside the VACT period when timing allows.
+		 */
+		u32 lp_vact_en: 1;
+
+		/* When set to 1, this bit enables the return to low-power
+		 * inside the HBP period when timing allows.
+		 */
+		u32 lp_hbp_en: 1;
+
+		/* When set to 1, this bit enables the return to low-power
+		 * inside the HFP period when timing allows.
+		 */
+		u32 lp_hfp_en: 1;
+
+		/* When set to 1, this bit enables the request for an ack-
+		 * nowledge response at the end of a frame.
+		 */
+		u32 frame_bta_ack_en: 1;
+
+		/* When set to 1, this bit enables the command transmission
+		 * only in low-power mode.
+		 */
+		u32 lp_cmd_en: 1;
+
+		u32 reserved_1: 16;
+
+		} bits;
+	} VID_MODE_CFG;
+
+	union _0x3C {
+		u32 val;
+		struct _SDF_MODE_CONFIG {
+		/*
+		 * This field defines the 3D mode on/off & display orientation:
+		 * 00: 3D mode off (2D mode on)
+		 * 01: 3D mode on, portrait orientation
+		 * 10: 3D mode on, landscape orientation
+		 * 11: Reserved
+		 */
+		u32 rf_3d_mode: 2;
+
+		/*
+		 * This field defines the 3D image format:
+		 * 00: Line (alternating lines of left and right data)
+		 * 01: Frame (alternating frames of left and right data)
+		 * 10: Pixel (alternating pixels of left and right data)
+		 * 11: Reserved
+		 */
+		u32 rf_3d_format: 2;
+
+		/*
+		 * This field defines whether there is a second VSYNC pulse
+		 * between Left and Right Images, when 3D Image Format is
+		 * Frame-based:
+		 * 0: No sync pulses between left and right data
+		 * 1: Sync pulse (HSYNC, VSYNC, blanking) between left and
+		 *    right data
+		 */
+		u32 second_vsync_en: 1;
+
+		/*
+		 * This bit defines the left or right order:
+		 * 0: Left eye data is sent first, and then the right eye data
+		 *    is sent.
+		 * 1: Right eye data is sent first, and then the left eye data
+		 *    is sent.
+		 */
+		u32 left_right_order: 1;
+
+		u32 reserved_0: 2;
+
+		/*
+		 * When set, causes the next VSS packet to include 3D control
+		 * payload in every VSS packet.
+		 */
+		u32 rf_3d_payload_en: 1;
+
+		u32 reserved_1: 23;
+
+		} bits;
+	} SDF_MODE_CONFIG;
+
+	union _0x40 {
+		u32 val;
+		struct _TIMEOUT_CNT_CLK_CONFIG {
+		/*
+		 * This field indicates the division factor for the Time Out
+		 * clock used as the timing unit in the configuration of HS to
+		 * LP and LP to HS transition error.
+		 */
+		u32 timeout_cnt_clk_config: 16;
+
+		u32 reserved: 16;
+
+		} bits;
+	} TIMEOUT_CNT_CLK_CONFIG;
+
+	union _0x44 {
+		u32 val;
+		struct _HTX_TO_CONFIG {
+		/*
+		 * This field configures the timeout counter that triggers
+		 * a high speed transmission timeout contention detection
+		 * (measured in TO_CLK_DIVISION cycles).
+		 *
+		 * If using the non-burst mode and there is no sufficient
+		 * time to switch from HS to LP and back in the period which
+		 * is from one line data finishing to the next line sync
+		 * start, the DSI link returns the LP state once per frame,
+		 * then you should configure the TO_CLK_DIVISION and
+		 * hstx_to_cnt to be in accordance with:
+		 * hstx_to_cnt * lanebyteclkperiod * TO_CLK_DIVISION >= the
+		 * time of one FRAME data transmission * (1 + 10%)
+		 *
+		 * In burst mode, RGB pixel packets are time-compressed,
+		 * leaving more time during a scan line. Therefore, if in
+		 * burst mode and there is sufficient time to switch from HS
+		 * to LP and back in the period of time from one line data
+		 * finishing to the next line sync start, the DSI link can
+		 * return LP mode and back in this time interval to save power.
+		 * For this, configure the TO_CLK_DIVISION and hstx_to_cnt
+		 * to be in accordance with:
+		 * hstx_to_cnt * lanebyteclkperiod * TO_CLK_DIVISION >= the
+		 * time of one LINE data transmission * (1 + 10%)
+		 */
+		u32 htx_to_cnt_limit: 32;
+		} bits;
+	} HTX_TO_CONFIG;
+
+	union _0x48 {
+		u32 val;
+		struct _LRX_H_TO_CONFIG {
+		/*
+		 * This field configures the timeout counter that triggers
+		 * a low-power reception timeout contention detection (measured
+		 * in TO_CLK_DIVISION cycles).
+		 */
+		u32 lrx_h_to_cnt_limit: 32;
+		} bits;
+	} LRX_H_TO_CONFIG;
+
+	union _0x4C {
+		u32 val;
+		struct _RD_PRESP_TO_CONFIG {
+		/*
+		 * This field sets a period for which the DWC_mipi_dsi_host
+		 * keeps the link still, after sending a low-power read oper-
+		 * ation. This period is measured in cycles of lanebyteclk.
+		 * The counting starts when the D-PHY enters the Stop state
+		 * and causes no interrupts.
+		 */
+		u32 lprd_presp_to_cnt_limit: 16;
+
+		/*
+		 * This field sets a period for which the DWC_mipi_dsi_host
+		 * keeps the link still, after sending a high-speed read oper-
+		 * ation. This period is measured in cycles of lanebyteclk.
+		 * The counting starts when the D-PHY enters the Stop state
+		 * and causes no interrupts.
+		 */
+		u32 hsrd_presp_to_cnt_limit: 16;
+
+		} bits;
+	} RD_PRESP_TO_CONFIG;
+
+	union _0x50 {
+		u32 val;
+		struct _HSWR_PRESP_TO_CONFIG {
+		/*
+		 * This field sets a period for which the DWC_mipi_dsi_host
+		 * keeps the link inactive after sending a high-speed write
+		 * operation. This period is measured in cycles of lanebyteclk.
+		 * The counting starts when the D-PHY enters the Stop state
+		 * and causes no interrupts.
+		 */
+		u32 hswr_presp_to_cnt_limit: 16;
+
+		u32 reserved_0: 8;
+
+		/*
+		 * When set to 1, this bit ensures that the peripheral response
+		 * timeout caused by hs_wr_to_cnt is used only once per eDPI
+		 * frame, when both the following conditions are met:
+		 * dpivsync_edpiwms has risen and fallen.
+		 * Packets originated from eDPI have been transmitted and its
+		 * FIFO is empty again In this scenario no non-eDPI requests
+		 * are sent to the D-PHY, even if there is traffic from generic
+		 * or DBI ready to be sent, making it return to stop state.
+		 * When it does so, PRESP_TO counter is activated and only when
+		 * it finishes does the controller send any other traffic that
+		 * is ready.
+		 */
+		u32 hswr_presp_to_mode: 1;
+
+		u32 reserved_1: 7;
+
+		} bits;
+	} HSWR_PRESP_TO_CONFIG;
+
+	union _0x54 {
+		u32 val;
+		struct _LPWR_PRESP_TO_CONFIG {
+		/*
+		 * This field sets a period for which the DWC_mipi_dsi_host
+		 * keeps the link still, after sending a low-power write oper-
+		 * ation. This period is measured in cycles of lanebyteclk.
+		 * The counting starts when the D-PHY enters the Stop state
+		 * and causes no interrupts.
+		 */
+		u32 lpwr_presp_to_cnt_limit: 16;
+
+		u32 reserved: 16;
+
+		} bits;
+	} LPWR_PRESP_TO_CONFIG;
+
+	union _0x58 {
+		u32 val;
+		struct _BTA_PRESP_TO_CONFIG {
+		/*
+		 * This field sets a period for which the DWC_mipi_dsi_host
+		 * keeps the link still, after completing a Bus Turn-Around.
+		 * This period is measured in cycles of lanebyteclk. The
+		 * counting starts when the D-PHY enters the Stop state and
+		 * causes no interrupts.
+		 */
+		u32 bta_presp_to_cnt_limit: 16;
+
+		u32 reserved: 16;
+
+		} bits;
+	} BTA_PRESP_TO_CONFIG;
+
+	union _0x5C {
+		u32 val;
+		struct _TX_ESC_CLK_CONFIG {
+		/*
+		 * This field indicates the division factor for the TX Escape
+		 * clock source (lanebyteclk). The values 0 and 1 stop the
+		 * TX_ESC clock generation.
+		 */
+		u32 tx_esc_clk_config: 16;
+
+		u32 reserved: 16;
+
+		} bits;
+	} TX_ESC_CLK_CONFIG;
+
+	union _0x60 {
+		u32 val;
+		struct _VACT_CMD_TRANS_LIMIT {
+		/*
+		 * This field is used for the transmission of commands in
+		 * low-power mode. It defines the size, in bytes, of the
+		 * largest packet that can fit in a line during the VACT
+		 * region.
+		 */
+		u32 vact_cmd_trans_limit: 8;
+
+		u32 reserved: 24;
+
+		} bits;
+	} VACT_CMD_TRANS_LIMIT;
+
+	union _0x64 {
+		u32 val;
+		struct _VBLK_CMD_TRANS_LIMIT {
+		/*
+		 * This field is used for the transmission of commands in
+		 * low-power mode. It defines the size, in bytes, of the
+		 * largest packet that can fit in a line during the VSA, VBP,
+		 * and VFP regions.
+		 */
+		u32 vblk_cmd_trans_limit: 8;
+
+		u32 reserved: 24;
+
+		} bits;
+	} VBLK_CMD_TRANS_LIMIT;
+
+	union _0x68 {
+		u32 val;
+		struct _CMD_MODE_CFG {
+		/*
+		 * When set to 1, this bit enables the tearing effect
+		 * acknowledge request.
+		 */
+		u32 tear_fx_en: 1;
+
+		/*
+		 * When set to 1, this bit enables the acknowledge request
+		 * after each packet transmission.
+		 */
+		u32 ack_rqst_en: 1;
+
+		u32 reserved_0: 3;
+
+		u32 pps_tx: 1;
+		u32 exq_tx: 1;
+		u32 cmc_tx: 1;
+
+		/*
+		 * This bit configures the Generic short write packet with
+		 * zero parameter command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 gen_sw_0p_tx: 1;
+
+		/*
+		 * This bit configures the Generic short write packet with
+		 * one parameter command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 gen_sw_1p_tx: 1;
+
+		/*
+		 * This bit configures the Generic short write packet with
+		 * two parameters command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 gen_sw_2p_tx: 1;
+
+		/*
+		 * This bit configures the Generic short read packet with
+		 * zero parameter command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 gen_sr_0p_tx: 1;
+
+		/*
+		 * This bit configures the Generic short read packet with
+		 * one parameter command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 gen_sr_1p_tx: 1;
+
+		/*
+		 * This bit configures the Generic short read packet with
+		 * two parameters command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 gen_sr_2p_tx: 1;
+
+		/*
+		 * This bit configures the Generic long write packet command
+		 * transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 gen_lw_tx: 1;
+
+		u32 reserved_1: 1;
+
+		/*
+		 * This bit configures the DCS short write packet with zero
+		 * parameter command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 dcs_sw_0p_tx: 1;
+
+		/*
+		 * This bit configures the DCS short write packet with one
+		 * parameter command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 dcs_sw_1p_tx: 1;
+
+		/*
+		 * This bit configures the DCS short read packet with zero
+		 * parameter command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 dcs_sr_0p_tx: 1;
+
+		/*
+		 * This bit configures the DCS long write packet command
+		 * transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 dcs_lw_tx: 1;
+
+		u32 reserved_2: 4;
+
+		/*
+		 * This bit configures the maximum read packet size command
+		 * transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 max_rd_pkt_size: 1;
+
+		u32 reserved_3: 7;
+
+		} bits;
+	} CMD_MODE_CFG;
+
+	union _0x6C {
+		u32 val;
+		struct _GEN_HDR {
+		/*
+		 * This field configures the packet data type of the header
+		 * packet.
+		 */
+		u32 gen_dt: 6;
+
+		/*
+		 * This field configures the virtual channel id of the header
+		 * packet.
+		 */
+		u32 gen_vc: 2;
+
+		/*
+		 * This field configures the least significant byte of the
+		 * header packet's Word count for long packets or data 0 for
+		 * short packets.
+		 */
+		u32 gen_wc_lsbyte: 8;
+
+		/*
+		 * This field configures the most significant byte of the
+		 * header packet's word count for long packets or data 1 for
+		 * short packets.
+		 */
+		u32 gen_wc_msbyte: 8;
+
+		u32 reserved: 8;
+
+		} bits;
+	} GEN_HDR;
+
+	union _0x70 {
+		u32 val;
+		struct _GEN_PLD_DATA {
+		/* This field indicates byte 1 of the packet payload. */
+		u32 gen_pld_b1: 8;
+
+		/* This field indicates byte 2 of the packet payload. */
+		u32 gen_pld_b2: 8;
+
+		/* This field indicates byte 3 of the packet payload. */
+		u32 gen_pld_b3: 8;
+
+		/* This field indicates byte 4 of the packet payload. */
+		u32 gen_pld_b4: 8;
+
+		} bits;
+	} GEN_PLD_DATA;
+
+	union _0x74 {
+		u32 val;
+		struct _PHY_CLK_LANE_LP_CTRL {
+		/* This bit controls the D-PHY PPI txrequestclkhs signal */
+		u32 phy_clklane_tx_req_hs: 1;
+
+		/* This bit enables the automatic mechanism to stop providing
+		 * clock in the clock lane when time allows.
+		 */
+		u32 auto_clklane_ctrl_en: 1;
+
+		u32 reserved: 30;
+		} bits;
+	} PHY_CLK_LANE_LP_CTRL;
+
+	union _0x78 {
+		u32 val;
+		struct _PHY_INTERFACE_CTRL {
+		/* When set to 0, this bit places the D-PHY macro in power-
+		 * down state.
+		 */
+		u32 rf_phy_shutdown: 1;
+
+		/* When set to 0, this bit places the digital section of the
+		 * D-PHY in the reset state.
+		 */
+		u32 rf_phy_reset_n: 1;
+
+		/* When set to 1, this bit enables the D-PHY Clock Lane
+		 * module.
+		 */
+		u32 rf_phy_clk_en: 1;
+
+		/* When the D-PHY is in ULPS, this bit enables the D-PHY PLL. */
+		u32 rf_phy_force_pll: 1;
+
+		/* ULPS mode Request on clock lane */
+		u32 rf_phy_clk_txrequlps: 1;
+
+		/* ULPS mode Exit on clock lane */
+		u32 rf_phy_clk_txexitulps: 1;
+
+		/* ULPS mode Request on all active data lanes */
+		u32 rf_phy_data_txrequlps: 1;
+
+		/* ULPS mode Exit on all active data lanes */
+		u32 rf_phy_data_txexitulps: 1;
+
+		u32 reserved: 24;
+		} bits;
+	} PHY_INTERFACE_CTRL;
+
+	union _0x7C {
+		u32 val;
+		struct _PHY_TX_TRIGGERS {
+		/* This field controls the trigger transmissions. */
+		u32 phy_tx_triggers: 4;
+
+		u32 reserved: 28;
+		} bits;
+	} PHY_TX_TRIGGERS;
+
+	union _0x80 {
+		u32 val;
+		struct _DESKEW_START {
+		u32 deskew_start: 1;
+		u32 reserved: 31;
+		} bits;
+	} DESKEW_START;
+
+	union _0x84 {
+		u32 val;
+		struct _DESKEW_MODE {
+		u32 deskew_mode: 2;
+		u32 reserved: 30;
+		} bits;
+	} DESKEW_MODE;
+
+	union _0x88 {
+		u32 val;
+		struct _DESKEW_TIME {
+		u32 deskew_time: 32;
+		} bits;
+	} DESKEW_TIME;
+
+	union _0x8C {
+		u32 val;
+		struct _DESKEW_PERIOD {
+		u32 deskew_period: 32;
+		} bits;
+	} DESKEW_PERIOD;
+
+	union _0x90 {
+		u32 val;
+		struct _DESKEW_BUSY {
+		u32 deskew_busy: 1;
+		u32 reserved: 31;
+		} bits;
+	} DESKEW_BUSY;
+
+	union _0x94 {
+		u32 val;
+		struct _DESKEW_LANE_MASK {
+		u32 deskew_lane0_mask: 1;
+		u32 deskew_lane1_mask: 1;
+		u32 deskew_lane2_mask: 1;
+		u32 deskew_lane3_mask: 1;
+		u32 reserved: 28;
+		} bits;
+	} DESKEW_LANE_MASK;
+
+	union _0x98 {
+		u32 val;
+		struct _CMD_MODE_STATUS {
+		/*
+		 * This bit is set when a read command is issued and cleared
+		 * when the entire response is stored in the FIFO.
+		 * Value after reset: 0x0
+		 *
+		 * NOTE:
+		 * For mipi-dsi-r1p0 IP, this bit is set immediately when
+		 *     the read cmd is set to the GEN_HDR register.
+		 *
+		 * For dsi-ctrl-r1p0 IP, this bit is set only after the read
+		 *     cmd was actually sent out from the controller.
+		 */
+		u32 gen_cmd_rdcmd_ongoing: 1;
+
+		/*
+		 * This bit indicates the empty status of the generic read
+		 * payload FIFO.
+		 * Value after reset: 0x1
+		 */
+		u32 gen_cmd_rdata_fifo_empty: 1;
+
+		/*
+		 * This bit indicates the full status of the generic read
+		 * payload FIFO.
+		 * Value after reset: 0x0
+		 */
+		u32 gen_cmd_rdata_fifo_full: 1;
+
+		/*
+		 * This bit indicates the empty status of the generic write
+		 * payload FIFO.
+		 * Value after reset: 0x1
+		 */
+		u32 gen_cmd_wdata_fifo_empty: 1;
+
+		/*
+		 * This bit indicates the full status of the generic write
+		 * payload FIFO.
+		 * Value after reset: 0x0
+		 */
+		u32 gen_cmd_wdata_fifo_full: 1;
+
+		/*
+		 * This bit indicates the empty status of the generic
+		 * command FIFO.
+		 * Value after reset: 0x1
+		 */
+		u32 gen_cmd_cmd_fifo_empty: 1;
+
+		/*
+		 * This bit indicates the full status of the generic
+		 * command FIFO.
+		 * Value after reset: 0x0
+		 */
+		u32 gen_cmd_cmd_fifo_full: 1;
+
+		/*
+		 * This bit is set when the entire response of read is
+		 * stored in the rx payload FIFO. And it will be cleared
+		 * automaticlly after read this bit each time.
+		 * Value after reset: 0x0
+		 *
+		 * NOTE: this bit is just supported for dsi-ctrl-r1p0 IP
+		 */
+		u32 gen_cmd_rdcmd_done: 1;
+
+		u32 reserved : 24;
+
+		} bits;
+	} CMD_MODE_STATUS;
+
+	union _0x9C {
+		u32 val;
+		struct _PHY_STATUS {
+		/* the status of phydirection D-PHY signal */
+		u32 phy_direction: 1;
+
+		/* the status of phylock D-PHY signal */
+		u32 phy_lock: 1;
+
+		/* the status of rxulpsesc0lane D-PHY signal */
+		u32 phy_rxulpsesc0lane: 1;
+
+		/* the status of phystopstateclklane D-PHY signal */
+		u32 phy_stopstateclklane: 1;
+
+		/* the status of phystopstate0lane D-PHY signal */
+		u32 phy_stopstate0lane: 1;
+
+		/* the status of phystopstate1lane D-PHY signal */
+		u32 phy_stopstate1lane: 1;
+
+		/* the status of phystopstate2lane D-PHY signal */
+		u32 phy_stopstate2lane: 1;
+
+		/* the status of phystopstate3lane D-PHY signal */
+		u32 phy_stopstate3lane: 1;
+
+		/* the status of phyulpsactivenotclk D-PHY signal */
+		u32 phy_ulpsactivenotclk: 1;
+
+		/* the status of ulpsactivenot0lane D-PHY signal */
+		u32 phy_ulpsactivenot0lane: 1;
+
+		/* the status of ulpsactivenot1lane D-PHY signal */
+		u32 phy_ulpsactivenot1lane: 1;
+
+		/* the status of ulpsactivenot2lane D-PHY signal */
+		u32 phy_ulpsactivenot2lane: 1;
+
+		/* the status of ulpsactivenot3lane D-PHY signal */
+		u32 phy_ulpsactivenot3lane: 1;
+
+		u32 reserved: 19;
+
+		} bits;
+	} PHY_STATUS;
+
+	union _0xA0 {
+		u32 val;
+		struct _PHY_MIN_STOP_TIME {
+		/* This field configures the minimum wait period to request
+		 * a high-speed transmission after the Stop state.
+		 */
+		u32 phy_min_stop_time: 8;
+
+		u32 reserved: 24;
+		} bits;
+	} PHY_MIN_STOP_TIME;
+
+	union _0xA4 {
+		u32 val;
+		struct _PHY_LANE_NUM_CONFIG {
+		/*
+		 * This field configures the number of active data lanes:
+		 * 00: One data lane (lane 0)
+		 * 01: Two data lanes (lanes 0 and 1)
+		 * 10: Three data lanes (lanes 0, 1, and 2)
+		 * 11: Four data lanes (lanes 0, 1, 2, and 3)
+		 */
+		u32 phy_lane_num: 2;
+
+		u32 reserved: 30;
+
+		} bits;
+	} PHY_LANE_NUM_CONFIG;
+
+	union _0xA8 {
+		u32 val;
+		struct _PHY_CLKLANE_TIME_CONFIG {
+		/*
+		 * This field configures the maximum time that the D-PHY
+		 * clock lane takes to go from low-power to high-speed
+		 * transmission measured in lane byte clock cycles.
+		 */
+		u32 phy_clklane_lp_to_hs_time: 16;
+
+		/*
+		 * This field configures the maximum time that the D-PHY
+		 * clock lane takes to go from high-speed to low-power
+		 * transmission measured in lane byte clock cycles.
+		 */
+		u32 phy_clklane_hs_to_lp_time: 16;
+
+		} bits;
+	} PHY_CLKLANE_TIME_CONFIG;
+
+	union _0xAC {
+		u32 val;
+		struct _PHY_DATALANE_TIME_CONFIG {
+		/*
+		 * This field configures the maximum time that the D-PHY data
+		 * lanes take to go from low-power to high-speed transmission
+		 * measured in lane byte clock cycles.
+		 */
+		u32 phy_datalane_lp_to_hs_time: 16;
+
+		/*
+		 * This field configures the maximum time that the D-PHY data
+		 * lanes take to go from high-speed to low-power transmission
+		 * measured in lane byte clock cycles.
+		 */
+		u32 phy_datalane_hs_to_lp_time: 16;
+
+		} bits;
+	} PHY_DATALANE_TIME_CONFIG;
+
+	union _0xB0 {
+		u32 val;
+		struct _MAX_READ_TIME {
+		/*
+		 * This field configures the maximum time required to perform
+		 * a read command in lane byte clock cycles. This register can
+		 * only be modified when no read command is in progress.
+		 */
+		u32 max_rd_time: 16;
+
+		u32 reserved: 16;
+
+		} bits;
+	} MAX_READ_TIME;
+
+	union _0xB4 {
+		u32 val;
+		struct _RX_PKT_CHECK_CONFIG {
+		/* When set to 1, this bit enables the ECC reception, error
+		 * correction, and reporting.
+		 */
+		u32 rx_pkt_ecc_en: 1;
+
+		/* When set to 1, this bit enables the CRC reception and error
+		 * reporting.
+		 */
+		u32 rx_pkt_crc_en: 1;
+
+		u32 reserved: 30;
+
+		} bits;
+	} RX_PKT_CHECK_CONFIG;
+
+	union _0xB8 {
+		u32 val;
+		struct _TA_EN {
+		/* When set to 1, this bit enables the Bus Turn-Around (BTA)
+		 * request.
+		 */
+		u32 ta_en: 1;
+
+		u32 reserved: 31;
+
+		} bits;
+	} TA_EN;
+
+	union _0xBC {
+		u32 val;
+		struct _EOTP_EN {
+		/* When set to 1, this bit enables the EoTp transmission */
+		u32 tx_eotp_en: 1;
+
+		/* When set to 1, this bit enables the EoTp reception. */
+		u32 rx_eotp_en: 1;
+
+		u32 reserved: 30;
+
+		} bits;
+	} EOTP_EN;
+
+	union _0xC0 {
+		u32 val;
+		struct _VIDEO_NULLPKT_SIZE {
+		/*
+		 * This register configures the number of bytes inside a null
+		 * packet. Setting it to 0 disables the null packets.
+		 */
+		u32 video_nullpkt_size: 13;
+
+		u32 reserved: 19;
+
+		} bits;
+	} VIDEO_NULLPKT_SIZE;
+
+	union _0xC4 {
+		u32 val;
+		struct _DCS_WM_PKT_SIZE {
+		/*
+		 * This field configures the maximum allowed size for an eDPI
+		 * write memory command, measured in pixels. Automatic parti-
+		 * tioning of data obtained from eDPI is permanently enabled.
+		 */
+		u32 dcs_wm_pkt_size: 16;
+
+		u32 reserved: 16;
+		} bits;
+	} DCS_WM_PKT_SIZE;
+
+	union _0xC8 {
+		u32 val;
+		struct _PROTOCOL_INT_CLR {
+		u32 clr_dphy_errors_0: 1;
+		u32 clr_dphy_errors_1: 1;
+		u32 clr_dphy_errors_2: 1;
+		u32 clr_dphy_errors_3: 1;
+		u32 clr_dphy_errors_4: 1;
+		u32 clr_protocol_debug_err: 11;
+		u32 clr_ack_with_err_0: 1;
+		u32 clr_ack_with_err_1: 1;
+		u32 clr_ack_with_err_2: 1;
+		u32 clr_ack_with_err_3: 1;
+		u32 clr_ack_with_err_4: 1;
+		u32 clr_ack_with_err_5: 1;
+		u32 clr_ack_with_err_6: 1;
+		u32 clr_ack_with_err_7: 1;
+		u32 clr_ack_with_err_8: 1;
+		u32 clr_ack_with_err_9: 1;
+		u32 clr_ack_with_err_10: 1;
+		u32 clr_ack_with_err_11: 1;
+		u32 clr_ack_with_err_12: 1;
+		u32 clr_ack_with_err_13: 1;
+		u32 clr_ack_with_err_14: 1;
+		u32 clr_ack_with_err_15: 1;
+		} bits;
+	} PROTOCOL_INT_CLR;
+
+	union _0xCC {
+		u32 val;
+		struct _INTERNAL_INT_CLR {
+		u32 clr_receive_pkt_size_err: 1;
+		u32 clr_eopt_not_receive_err: 1;
+		u32 clr_gen_cmd_cmd_fifo_wr_err: 1;
+		u32 clr_gen_cmd_rdata_fifo_rd_err: 1;
+		u32 clr_gen_cmd_rdata_fifo_wr_err: 1;
+		u32 clr_gen_cmd_wdata_fifo_wr_err: 1;
+		u32 clr_gen_cmd_wdata_fifo_rd_err: 1;
+		u32 clr_dpi_pix_fifo_wr_err: 1;
+		u32 clr_internal_debug_err: 19;
+		u32 clr_ecc_single_err: 1;
+		u32 clr_ecc_multi_err: 1;
+		u32 clr_crc_err: 1;
+		u32 clr_hs_tx_timeout: 1;
+		u32 clr_lp_rx_timeout: 1;
+		} bits;
+	} INTERNAL_INT_CLR;
+
+	union _0xD0 {
+		u32 val;
+		struct _VIDEO_SIG_DELAY_CONFIG {
+
+		/*
+		 * DPI interface signal delay to be used in clk lanebyte
+		 * domain for control logic to read video data from pixel
+		 * memory in mannal mode, measured in clk_lanebyte cycles
+		 */
+		u32 video_sig_delay: 24;
+
+		/*
+		 * 1'b1: mannal mode
+		 *       dsi controller will use video_sig_delay value as
+		 *       the delay for the packet handle logic to read video
+		 *       data from pixel memory.
+		 *
+		 * 1'b0: auto mode
+		 *       dsi controller will auto calculate the delay for
+		 *       the packet handle logic to read video data from
+		 *       pixel memory.
+		 */
+		u32 video_sig_delay_mode: 1;
+
+		u32 reserved: 7;
+		} bits;
+	} VIDEO_SIG_DELAY_CONFIG;
+
+	u32 reservedD4_EC[7];
+
+	union _0xF0 {
+		u32 val;
+		struct _PHY_TST_CTRL0 {
+		/* PHY test interface clear (active high) */
+		u32 phy_testclr: 1;
+
+		/* This bit is used to clock the TESTDIN bus into the D-PHY */
+		u32 phy_testclk: 1;
+
+		u32 reserved: 30;
+		} bits;
+	} PHY_TST_CTRL0;
+
+	union _0xF4 {
+		u32 val;
+		struct _PHY_TST_CTRL1 {
+		/* PHY test interface input 8-bit data bus for internal
+		 * register programming and test functionalities access.
+		 */
+		u32 phy_testdin: 8;
+
+		/* PHY output 8-bit data bus for read-back and internal
+		 * probing functionalities.
+		 */
+		u32 phy_testdout: 8;
+
+		/*
+		 * PHY test interface operation selector:
+		 * 1: The address write operation is set on the falling edge
+		 *    of the testclk signal.
+		 * 0: The data write operation is set on the rising edge of
+		 *    the testclk signal.
+		 */
+		u32 phy_testen: 1;
+
+		u32 reserved: 15;
+		} bits;
+	} PHY_TST_CTRL1;
+
+	u32 reservedF8_1FC[66];
+
+	union _0x200 {
+		u32 val;
+		struct _INT_PLL_STS {
+		u32 int_pll_sts: 1;
+		u32 reserved: 31;
+		} bits;
+	} INT_PLL_STS;
+
+	union _0x204 {
+		u32 val;
+		struct _INT_PLL_MSK {
+		u32 int_pll_msk: 1;
+		u32 reserved: 31;
+		} bits;
+	} INT_PLL_MSK;
+
+	union _0x208 {
+		u32 val;
+		struct _INT_PLL_CLR {
+		u32 int_pll_clr: 1;
+		u32 reserved: 31;
+		} bits;
+	} INT_PLL_CLR;
+
+};
+
+void dsi_power_enable(struct dsi_context *ctx, int enable);
+void dsi_video_mode(struct dsi_context *ctx);
+void dsi_cmd_mode(struct dsi_context *ctx);
+bool dsi_is_cmd_mode(struct dsi_context *ctx);
+void dsi_rx_vcid(struct dsi_context *ctx, u8 vc);
+void dsi_video_vcid(struct dsi_context *ctx, u8 vc);
+void dsi_dpi_video_burst_mode(struct dsi_context *ctx, int mode);
+void dsi_dpi_color_coding(struct dsi_context *ctx, int coding);
+void dsi_dpi_sig_delay(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_dpi_hline_time(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_dpi_hsync_time(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_dpi_hbp_time(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_dpi_vact(struct dsi_context *ctx, u16 lines);
+void dsi_dpi_vfp(struct dsi_context *ctx, u16 lines);
+void dsi_dpi_vbp(struct dsi_context *ctx, u16 lines);
+void dsi_dpi_vsync(struct dsi_context *ctx, u16 lines);
+void dsi_dpi_hporch_lp_en(struct dsi_context *ctx, int enable);
+void dsi_dpi_vporch_lp_en(struct dsi_context *ctx, int enable);
+void dsi_dpi_frame_ack_en(struct dsi_context *ctx, int enable);
+void dsi_dpi_chunk_num(struct dsi_context *ctx, u16 no);
+void dsi_dpi_null_packet_size(struct dsi_context *ctx, u16 size);
+void dsi_dpi_video_packet_size(struct dsi_context *ctx, u16 size);
+void dsi_edpi_max_pkt_size(struct dsi_context *ctx, u16 size);
+void dsi_tear_effect_ack_en(struct dsi_context *ctx, int enable);
+void dsi_cmd_mode_lp_cmd_en(struct dsi_context *ctx, int enable);
+void dsi_video_mode_lp_cmd_en(struct dsi_context *ctx, int enable);
+void dsi_set_packet_header(struct dsi_context *ctx, u8 vc, u8 type,
+						u8 wc_lsb, u8 wc_msb);
+void dsi_set_packet_payload(struct dsi_context *ctx, u32 payload);
+u32 dsi_get_rx_payload(struct dsi_context *ctx);
+void dsi_bta_en(struct dsi_context *ctx, int enable);
+void dsi_eotp_rx_en(struct dsi_context *ctx, int enable);
+void dsi_eotp_tx_en(struct dsi_context *ctx, int enable);
+void dsi_ecc_rx_en(struct dsi_context *ctx, int enable);
+void dsi_crc_rx_en(struct dsi_context *ctx, int enable);
+bool dsi_is_bta_returned(struct dsi_context *ctx);
+bool dsi_is_rx_payload_fifo_full(struct dsi_context *ctx);
+bool dsi_is_rx_payload_fifo_empty(struct dsi_context *ctx);
+bool dsi_is_tx_payload_fifo_full(struct dsi_context *ctx);
+bool dsi_is_tx_payload_fifo_empty(struct dsi_context *ctx);
+bool dsi_is_tx_cmd_fifo_empty(struct dsi_context *ctx);
+void dsi_datalane_hs2lp_config(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_datalane_lp2hs_config(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_clklane_hs2lp_config(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_clklane_lp2hs_config(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_max_read_time(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_nc_clk_en(struct dsi_context *ctx, int enable);
+void dsi_tx_escape_division(struct dsi_context *ctx, u8 div);
+void dsi_timeout_clock_division(struct dsi_context *ctx, u8 div);
+void dsi_lp_rx_timeout(struct dsi_context *ctx, u16 count);
+void dsi_hs_tx_timeout(struct dsi_context *ctx, u16 count);
+u32 dsi_int0_status(struct dsi_context *ctx);
+u32 dsi_int1_status(struct dsi_context *ctx);
+void dsi_int0_mask(struct dsi_context *ctx, u32 mask);
+void dsi_int1_mask(struct dsi_context *ctx, u32 mask);
+
+#endif /* _DW_DSI_CTRL_H_ */
diff --git a/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c b/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c
new file mode 100644
index 0000000..b3f4624
--- /dev/null
+++ b/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c
@@ -0,0 +1,276 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include "dw_dsi_ctrl.h"
+#include "dw_dsi_ctrl_ppi.h"
+#include "sprd_dphy.h"
+
+/*
+ * Reset D-PHY module
+ */
+void dsi_phy_rstz(struct dphy_context *ctx, int level)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x78 phy_interface_ctrl;
+
+	phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL);
+	phy_interface_ctrl.bits.rf_phy_reset_n = level;
+
+	writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL);
+}
+
+/*
+ * Power up/down D-PHY module
+ */
+void dsi_phy_shutdownz(struct dphy_context *ctx, int level)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x78 phy_interface_ctrl;
+
+	phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL);
+	phy_interface_ctrl.bits.rf_phy_shutdown = level;
+
+	writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL);
+}
+
+/*
+ * Force D-PHY PLL to stay on while in ULPS
+ */
+void dsi_phy_force_pll(struct dphy_context *ctx, int force)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x78 phy_interface_ctrl;
+
+	phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL);
+	phy_interface_ctrl.bits.rf_phy_force_pll = force;
+
+	writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL);
+}
+
+void dsi_phy_clklane_ulps_rqst(struct dphy_context *ctx, int en)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x78 phy_interface_ctrl;
+
+	phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL);
+	phy_interface_ctrl.bits.rf_phy_clk_txrequlps = en;
+
+	writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL);
+}
+
+void dsi_phy_clklane_ulps_exit(struct dphy_context *ctx, int en)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x78 phy_interface_ctrl;
+
+	phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL);
+	phy_interface_ctrl.bits.rf_phy_clk_txexitulps = en;
+
+	writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL);
+}
+
+void dsi_phy_datalane_ulps_rqst(struct dphy_context *ctx, int en)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x78 phy_interface_ctrl;
+
+	phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL);
+	phy_interface_ctrl.bits.rf_phy_data_txrequlps = en;
+
+	writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL);
+}
+
+void dsi_phy_datalane_ulps_exit(struct dphy_context *ctx, int en)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x78 phy_interface_ctrl;
+
+	phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL);
+	phy_interface_ctrl.bits.rf_phy_data_txexitulps = en;
+
+	writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL);
+}
+
+/*
+ * Configure minimum wait period for HS transmission request after a stop state
+ */
+void dsi_phy_stop_wait_time(struct dphy_context *ctx, u8 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+
+	writel(byte_cycle, &reg->PHY_MIN_STOP_TIME);
+}
+
+/*
+ * Set number of active lanes
+ */
+void dsi_phy_datalane_en(struct dphy_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+
+	writel(ctx->lanes - 1, &reg->PHY_LANE_NUM_CONFIG);
+}
+
+/*
+ * Enable clock lane module
+ */
+void dsi_phy_clklane_en(struct dphy_context *ctx, int en)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x78 phy_interface_ctrl;
+
+	phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL);
+	phy_interface_ctrl.bits.rf_phy_clk_en = en;
+
+	writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL);
+}
+
+/*
+ * Request the PHY module to start transmission of high speed clock.
+ * This causes the clock lane to start transmitting DDR clock on the
+ * lane interconnect.
+ */
+void dsi_phy_clk_hs_rqst(struct dphy_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x74 phy_clk_lane_lp_ctrl;
+
+	phy_clk_lane_lp_ctrl.val = readl(&reg->PHY_CLK_LANE_LP_CTRL);
+	phy_clk_lane_lp_ctrl.bits.auto_clklane_ctrl_en = 0;
+	phy_clk_lane_lp_ctrl.bits.phy_clklane_tx_req_hs = enable;
+
+	writel(phy_clk_lane_lp_ctrl.val, &reg->PHY_CLK_LANE_LP_CTRL);
+}
+
+/*
+ * Get D-PHY PPI status
+ */
+u8 dsi_phy_is_pll_locked(struct dphy_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x9C phy_status;
+
+	phy_status.val = readl(&reg->PHY_STATUS);
+
+	return phy_status.bits.phy_lock;
+}
+
+u8 dsi_phy_is_stop_state_datalane(struct dphy_context *ctx)
+{
+	u8 state = 0;
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x9C phy_status;
+
+	phy_status.val = readl(&reg->PHY_STATUS);
+
+	if (phy_status.bits.phy_stopstate0lane)
+		state |= BIT(0);
+	if (phy_status.bits.phy_stopstate1lane)
+		state |= BIT(1);
+	if (phy_status.bits.phy_stopstate2lane)
+		state |= BIT(2);
+	if (phy_status.bits.phy_stopstate3lane)
+		state |= BIT(3);
+
+	return state;
+}
+
+u8 dsi_phy_is_stop_state_clklane(struct dphy_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x9C phy_status;
+
+	phy_status.val = readl(&reg->PHY_STATUS);
+
+	return phy_status.bits.phy_stopstateclklane;
+}
+
+u8 dsi_phy_is_ulps_active_datalane(struct dphy_context *ctx)
+{
+	u8 state = 0;
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x9C phy_status;
+
+	phy_status.val = readl(&reg->PHY_STATUS);
+
+	if (!phy_status.bits.phy_ulpsactivenot0lane)
+		state |= BIT(0);
+	if (!phy_status.bits.phy_ulpsactivenot1lane)
+		state |= BIT(1);
+	if (!phy_status.bits.phy_ulpsactivenot2lane)
+		state |= BIT(2);
+	if (!phy_status.bits.phy_ulpsactivenot3lane)
+		state |= BIT(3);
+
+	return state;
+}
+
+u8 dsi_phy_is_ulps_active_clklane(struct dphy_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x9C phy_status;
+
+	phy_status.val = readl(&reg->PHY_STATUS);
+
+	return !phy_status.bits.phy_ulpsactivenotclk;
+}
+
+void dsi_phy_test_clk(struct dphy_context *ctx, u8 value)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0xF0 phy_tst_ctrl0;
+
+	phy_tst_ctrl0.val = readl(&reg->PHY_TST_CTRL0);
+	phy_tst_ctrl0.bits.phy_testclk = value;
+
+	writel(phy_tst_ctrl0.val, &reg->PHY_TST_CTRL0);
+}
+
+void dsi_phy_test_clr(struct dphy_context *ctx, u8 value)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0xF0 phy_tst_ctrl0;
+
+	phy_tst_ctrl0.val = readl(&reg->PHY_TST_CTRL0);
+	phy_tst_ctrl0.bits.phy_testclr = value;
+
+	writel(phy_tst_ctrl0.val, &reg->PHY_TST_CTRL0);
+}
+
+void dsi_phy_test_en(struct dphy_context *ctx, u8 value)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0xF4 phy_tst_ctrl1;
+
+	phy_tst_ctrl1.val = readl(&reg->PHY_TST_CTRL1);
+	phy_tst_ctrl1.bits.phy_testen = value;
+
+	writel(phy_tst_ctrl1.val, &reg->PHY_TST_CTRL1);
+}
+
+u8 dsi_phy_test_dout(struct dphy_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0xF4 phy_tst_ctrl1;
+
+	phy_tst_ctrl1.val = readl(&reg->PHY_TST_CTRL1);
+
+	return phy_tst_ctrl1.bits.phy_testdout;
+}
+
+void dsi_phy_test_din(struct dphy_context *ctx, u8 data)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0xF4 phy_tst_ctrl1;
+
+	phy_tst_ctrl1.val = readl(&reg->PHY_TST_CTRL1);
+	phy_tst_ctrl1.bits.phy_testdin = data;
+
+	writel(phy_tst_ctrl1.val, &reg->PHY_TST_CTRL1);
+}
diff --git a/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h b/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h
new file mode 100644
index 0000000..eecdd71
--- /dev/null
+++ b/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#ifndef _DW_DSI_CTRL_PPI_H_
+#define _DW_DSI_CTRL_PPI_H_
+
+#include "sprd_dphy.h"
+
+void dsi_phy_rstz(struct dphy_context *ctx, int level);
+void dsi_phy_shutdownz(struct dphy_context *ctx, int level);
+void dsi_phy_force_pll(struct dphy_context *ctx, int force);
+void dsi_phy_clklane_ulps_rqst(struct dphy_context *ctx, int en);
+void dsi_phy_clklane_ulps_exit(struct dphy_context *ctx, int en);
+void dsi_phy_datalane_ulps_rqst(struct dphy_context *ctx, int en);
+void dsi_phy_datalane_ulps_exit(struct dphy_context *ctx, int en);
+void dsi_phy_stop_wait_time(struct dphy_context *ctx, u8 byte_clk);
+void dsi_phy_datalane_en(struct dphy_context *ctx);
+void dsi_phy_clklane_en(struct dphy_context *ctx, int en);
+void dsi_phy_clk_hs_rqst(struct dphy_context *ctx, int en);
+u8 dsi_phy_is_pll_locked(struct dphy_context *ctx);
+u8 dsi_phy_is_stop_state_clklane(struct dphy_context *ctx);
+u8 dsi_phy_is_stop_state_datalane(struct dphy_context *ctx);
+u8 dsi_phy_is_ulps_active_datalane(struct dphy_context *ctx);
+u8 dsi_phy_is_ulps_active_clklane(struct dphy_context *ctx);
+void dsi_phy_test_clk(struct dphy_context *ctx, u8 level);
+void dsi_phy_test_clr(struct dphy_context *ctx, u8 level);
+void dsi_phy_test_en(struct dphy_context *ctx, u8 level);
+u8 dsi_phy_test_dout(struct dphy_context *ctx);
+void dsi_phy_test_din(struct dphy_context *ctx, u8 data);
+void dsi_phy_bist_en(struct dphy_context *ctx, int en);
+
+#endif /* _DW_DSI_CTRL_PPI_H_ */
\ No newline at end of file
diff --git a/drivers/gpu/drm/sprd/megacores_pll.c b/drivers/gpu/drm/sprd/megacores_pll.c
new file mode 100644
index 0000000..8527eea
--- /dev/null
+++ b/drivers/gpu/drm/sprd/megacores_pll.c
@@ -0,0 +1,315 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#include <asm/div64.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/regmap.h>
+#include <linux/string.h>
+
+#include "megacores_pll.h"
+
+#define L						0
+#define H						1
+#define CLK						0
+#define DATA					1
+#define INFINITY				0xffffffff
+#define MIN_OUTPUT_FREQ			(100)
+
+#define AVERAGE(a, b) (min(a, b) + abs((b) - (a)) / 2)
+
+/* sharkle */
+#define VCO_BAND_LOW	750
+#define VCO_BAND_MID	1100
+#define VCO_BAND_HIGH	1500
+#define PHY_REF_CLK	26000
+
+static int dphy_calc_pll_param(struct dphy_pll *pll)
+{
+	const u32 khz = 1000;
+	const u32 mhz = 1000000;
+	const unsigned long long factor = 100;
+	unsigned long long tmp;
+	int i;
+
+	pll->potential_fvco = pll->freq / khz;
+	pll->ref_clk = PHY_REF_CLK / khz;
+
+	for (i = 0; i < 4; ++i) {
+		if (pll->potential_fvco >= VCO_BAND_LOW &&
+			pll->potential_fvco <= VCO_BAND_HIGH) {
+			pll->fvco = pll->potential_fvco;
+			pll->out_sel = BIT(i);
+			break;
+		}
+		pll->potential_fvco <<= 1;
+	}
+	if (pll->fvco == 0)
+		return -EINVAL;
+
+	if (pll->fvco >= VCO_BAND_LOW && pll->fvco <= VCO_BAND_MID) {
+		/* vco band control */
+		pll->vco_band = 0x0;
+		/* low pass filter control */
+		pll->lpf_sel = 1;
+	} else if (pll->fvco > VCO_BAND_MID && pll->fvco <= VCO_BAND_HIGH) {
+		pll->vco_band = 0x1;
+		pll->lpf_sel = 0;
+	} else
+		return -EINVAL;
+
+	pll->nint = pll->fvco / pll->ref_clk;
+	tmp = pll->fvco * factor * mhz;
+	do_div(tmp, pll->ref_clk);
+	tmp = tmp - pll->nint * factor * mhz;
+	tmp *= BIT(20);
+	do_div(tmp, 100000000);
+	pll->kint = (u32)tmp;
+	pll->refin = 3; /* pre-divider bypass */
+	pll->sdm_en = true; /* use fraction N PLL */
+	pll->fdk_s = 0x1; /* fraction */
+	pll->cp_s = 0x0;
+	pll->det_delay = 0x1;
+
+	return 0;
+}
+
+static void dphy_set_pll_reg(struct dphy_pll *pll, struct regmap *regmap)
+{
+	struct pll_reg *reg = &pll->reg;
+	u8 *val;
+	int i;
+
+	u8 reg_addr[] = {
+		0x03, 0x04, 0x06, 0x08, 0x09,
+		0x0a, 0x0b, 0x0e, 0x0f
+	};
+
+	reg->_03.bits.prbs_bist = 1;
+	reg->_03.bits.en_lp_treot = true;
+	reg->_03.bits.lpf_sel = pll->lpf_sel;
+	reg->_03.bits.txfifo_bypass = 0;
+	reg->_04.bits.div = pll->div;
+	reg->_04.bits.masterof8lane = 1;
+	reg->_04.bits.cp_s = pll->cp_s;
+	reg->_04.bits.fdk_s = pll->fdk_s;
+	reg->_06.bits.nint = pll->nint;
+	reg->_08.bits.vco_band = pll->vco_band;
+	reg->_08.bits.sdm_en = pll->sdm_en;
+	reg->_08.bits.refin = pll->refin;
+	reg->_09.bits.kint_h = pll->kint >> 12;
+	reg->_0a.bits.kint_m = (pll->kint >> 4) & 0xff;
+	reg->_0b.bits.out_sel = pll->out_sel;
+	reg->_0b.bits.kint_l = pll->kint & 0xf;
+	reg->_0e.bits.pll_pu_byp = 0;
+	reg->_0e.bits.pll_pu = 0;
+	reg->_0e.bits.stopstate_sel = 1;
+	reg->_0f.bits.det_delay = pll->det_delay;
+
+	val = (u8 *)&reg;
+
+	for (i = 0; i < sizeof(reg_addr); ++i) {
+		regmap_write(regmap, reg_addr[i], val[i]);
+		DRM_DEBUG("%02x: %02x\n", reg_addr[i], val[i]);
+	}
+}
+
+int dphy_pll_config(struct dphy_context *ctx)
+{
+	struct regmap *regmap = ctx->regmap;
+	struct dphy_pll *pll = ctx->pll;
+	int ret;
+
+	pll->freq = ctx->freq;
+
+	/* FREQ = 26M * (NINT + KINT / 2^20) / out_sel */
+	ret = dphy_calc_pll_param(pll);
+	if (ret) {
+		DRM_ERROR("failed to calculate dphy pll parameters\n");
+		return ret;
+	}
+	dphy_set_pll_reg(pll, regmap);
+
+	return 0;
+}
+
+static void dphy_set_timing_reg(struct regmap *regmap, int type, u8 val[])
+{
+	switch (type) {
+	case REQUEST_TIME:
+		regmap_write(regmap, 0x31, val[CLK]);
+		regmap_write(regmap, 0x41, val[DATA]);
+		regmap_write(regmap, 0x51, val[DATA]);
+		regmap_write(regmap, 0x61, val[DATA]);
+		regmap_write(regmap, 0x71, val[DATA]);
+
+		regmap_write(regmap, 0x90, val[CLK]);
+		regmap_write(regmap, 0xa0, val[DATA]);
+		regmap_write(regmap, 0xb0, val[DATA]);
+		regmap_write(regmap, 0xc0, val[DATA]);
+		regmap_write(regmap, 0xd0, val[DATA]);
+		break;
+	case PREPARE_TIME:
+		regmap_write(regmap, 0x32, val[CLK]);
+		regmap_write(regmap, 0x42, val[DATA]);
+		regmap_write(regmap, 0x52, val[DATA]);
+		regmap_write(regmap, 0x62, val[DATA]);
+		regmap_write(regmap, 0x72, val[DATA]);
+
+		regmap_write(regmap, 0x91, val[CLK]);
+		regmap_write(regmap, 0xa1, val[DATA]);
+		regmap_write(regmap, 0xb1, val[DATA]);
+		regmap_write(regmap, 0xc1, val[DATA]);
+		regmap_write(regmap, 0xd1, val[DATA]);
+		break;
+	case ZERO_TIME:
+		regmap_write(regmap, 0x33, val[CLK]);
+		regmap_write(regmap, 0x43, val[DATA]);
+		regmap_write(regmap, 0x53, val[DATA]);
+		regmap_write(regmap, 0x63, val[DATA]);
+		regmap_write(regmap, 0x73, val[DATA]);
+
+		regmap_write(regmap, 0x92, val[CLK]);
+		regmap_write(regmap, 0xa2, val[DATA]);
+		regmap_write(regmap, 0xb2, val[DATA]);
+		regmap_write(regmap, 0xc2, val[DATA]);
+		regmap_write(regmap, 0xd2, val[DATA]);
+		break;
+	case TRAIL_TIME:
+		regmap_write(regmap, 0x34, val[CLK]);
+		regmap_write(regmap, 0x44, val[DATA]);
+		regmap_write(regmap, 0x54, val[DATA]);
+		regmap_write(regmap, 0x64, val[DATA]);
+		regmap_write(regmap, 0x74, val[DATA]);
+
+		regmap_write(regmap, 0x93, val[CLK]);
+		regmap_write(regmap, 0xa3, val[DATA]);
+		regmap_write(regmap, 0xb3, val[DATA]);
+		regmap_write(regmap, 0xc3, val[DATA]);
+		regmap_write(regmap, 0xd3, val[DATA]);
+		break;
+	case EXIT_TIME:
+		regmap_write(regmap, 0x36, val[CLK]);
+		regmap_write(regmap, 0x46, val[DATA]);
+		regmap_write(regmap, 0x56, val[DATA]);
+		regmap_write(regmap, 0x66, val[DATA]);
+		regmap_write(regmap, 0x76, val[DATA]);
+
+		regmap_write(regmap, 0x95, val[CLK]);
+		regmap_write(regmap, 0xA5, val[DATA]);
+		regmap_write(regmap, 0xB5, val[DATA]);
+		regmap_write(regmap, 0xc5, val[DATA]);
+		regmap_write(regmap, 0xd5, val[DATA]);
+		break;
+	case CLKPOST_TIME:
+		regmap_write(regmap, 0x35, val[CLK]);
+		regmap_write(regmap, 0x94, val[CLK]);
+		break;
+
+	/* the following just use default value */
+	case SETTLE_TIME:
+	case TA_GET:
+	case TA_GO:
+	case TA_SURE:
+		break;
+	default:
+		break;
+	}
+}
+
+void dphy_timing_config(struct dphy_context *ctx)
+{
+	struct regmap *regmap = ctx->regmap;
+	const u32 factor = 2;
+	const u32 scale = 100;
+	u32 t_ui, t_byteck, t_half_byteck;
+	u32 range[2], constant;
+	u8 val[2];
+	u32 tmp = 0;
+
+	/* t_ui: 1 ui, byteck: 8 ui, half byteck: 4 ui */
+	t_ui = 1000 * scale / (ctx->freq / 1000);
+	t_byteck = t_ui << 3;
+	t_half_byteck = t_ui << 2;
+	constant = t_ui << 1;
+
+	/* REQUEST_TIME: HS T-LPX: LP-01
+	 * For T-LPX, mipi spec defined min value is 50ns,
+	 * but maybe it shouldn't be too small, because BTA,
+	 * LP-10, LP-00, LP-01, all of this is related to T-LPX.
+	 */
+	range[L] = 50 * scale;
+	range[H] = INFINITY;
+	val[CLK] = DIV_ROUND_UP(range[L] * (factor << 1), t_byteck) - 2;
+	val[DATA] = val[CLK];
+	dphy_set_timing_reg(regmap, REQUEST_TIME, val);
+
+	/* PREPARE_TIME: HS sequence: LP-00 */
+	range[L] = 38 * scale;
+	range[H] = 95 * scale;
+	tmp = AVERAGE(range[L], range[H]);
+	val[CLK] = DIV_ROUND_UP(AVERAGE(range[L], range[H]),
+			t_half_byteck) - 1;
+	range[L] = 40 * scale + 4 * t_ui;
+	range[H] = 85 * scale + 6 * t_ui;
+	tmp |= AVERAGE(range[L], range[H]) << 16;
+	val[DATA] = DIV_ROUND_UP(AVERAGE(range[L], range[H]),
+			t_half_byteck) - 1;
+	dphy_set_timing_reg(regmap, PREPARE_TIME, val);
+
+	/* ZERO_TIME: HS-ZERO */
+	range[L] = 300 * scale;
+	range[H] = INFINITY;
+	val[CLK] = DIV_ROUND_UP(range[L] * factor + (tmp & 0xffff)
+			- 525 * t_byteck / 100, t_byteck) - 2;
+	range[L] = 145 * scale + 10 * t_ui;
+	val[DATA] = DIV_ROUND_UP(range[L] * factor
+			+ ((tmp >> 16) & 0xffff) - 525 * t_byteck / 100,
+			t_byteck) - 2;
+	dphy_set_timing_reg(regmap, ZERO_TIME, val);
+
+	/* TRAIL_TIME: HS-TRAIL */
+	range[L] = 60 * scale;
+	range[H] = INFINITY;
+	val[CLK] = DIV_ROUND_UP(range[L] * factor - constant, t_half_byteck);
+	range[L] = max(8 * t_ui, 60 * scale + 4 * t_ui);
+	val[DATA] = DIV_ROUND_UP(range[L] * 3 / 2 - constant, t_half_byteck) - 2;
+	dphy_set_timing_reg(regmap, TRAIL_TIME, val);
+
+	/* EXIT_TIME: */
+	range[L] = 100 * scale;
+	range[H] = INFINITY;
+	val[CLK] = DIV_ROUND_UP(range[L] * factor, t_byteck) - 2;
+	val[DATA] = val[CLK];
+	dphy_set_timing_reg(regmap, EXIT_TIME, val);
+
+	/* CLKPOST_TIME: */
+	range[L] = 60 * scale + 52 * t_ui;
+	range[H] = INFINITY;
+	val[CLK] = DIV_ROUND_UP(range[L] * factor, t_byteck) - 2;
+	val[DATA] = val[CLK];
+	dphy_set_timing_reg(regmap, CLKPOST_TIME, val);
+
+	/* SETTLE_TIME:
+	 * This time is used for receiver. So for transmitter,
+	 * it can be ignored.
+	 */
+
+	/* TA_GO:
+	 * transmitter drives bridge state(LP-00) before releasing control,
+	 * reg 0x1f default value: 0x04, which is good.
+	 */
+
+	/* TA_SURE:
+	 * After LP-10 state and before bridge state(LP-00),
+	 * reg 0x20 default value: 0x01, which is good.
+	 */
+
+	/* TA_GET:
+	 * receiver drives Bridge state(LP-00) before releasing control
+	 * reg 0x21 default value: 0x03, which is good.
+	 */
+}
diff --git a/drivers/gpu/drm/sprd/megacores_pll.h b/drivers/gpu/drm/sprd/megacores_pll.h
new file mode 100644
index 0000000..0e82099
--- /dev/null
+++ b/drivers/gpu/drm/sprd/megacores_pll.h
@@ -0,0 +1,146 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#ifndef _MEGACORES_PLL_H_
+#define _MEGACORES_PLL_H_
+
+#include "sprd_dphy.h"
+
+enum PLL_TIMING {
+	NONE,
+	REQUEST_TIME,
+	PREPARE_TIME,
+	SETTLE_TIME,
+	ZERO_TIME,
+	TRAIL_TIME,
+	EXIT_TIME,
+	CLKPOST_TIME,
+	TA_GET,
+	TA_GO,
+	TA_SURE,
+	TA_WAIT,
+};
+
+struct pll_reg {
+	union __reg_03__ {
+		struct __03 {
+			u8 prbs_bist: 1;
+			u8 en_lp_treot: 1;
+			u8 lpf_sel: 4;
+			u8 txfifo_bypass: 1;
+			u8 freq_hopping: 1;
+		} bits;
+		u8 val;
+	} _03;
+	union __reg_04__ {
+		struct __04 {
+			u8 div: 3;
+			u8 masterof8lane: 1;
+			u8 hop_trig: 1;
+			u8 cp_s: 2;
+			u8 fdk_s: 1;
+		} bits;
+		u8 val;
+	} _04;
+	union __reg_06__ {
+		struct __06 {
+			u8 nint: 7;
+			u8 mod_en: 1;
+		} bits;
+		u8 val;
+	} _06;
+	union __reg_07__ {
+		struct __07 {
+			u8 kdelta_h: 8;
+		} bits;
+		u8 val;
+	} _07;
+	union __reg_08__ {
+		struct __08 {
+			u8 vco_band: 1;
+			u8 sdm_en: 1;
+			u8 refin: 2;
+			u8 kdelta_l: 4;
+		} bits;
+		u8 val;
+	} _08;
+	union __reg_09__ {
+		struct __09 {
+			u8 kint_h: 8;
+		} bits;
+		u8 val;
+	} _09;
+	union __reg_0a__ {
+		struct __0a {
+			u8 kint_m: 8;
+		} bits;
+		u8 val;
+	} _0a;
+	union __reg_0b__ {
+		struct __0b {
+			u8 out_sel: 4;
+			u8 kint_l: 4;
+		} bits;
+		u8 val;
+	} _0b;
+	union __reg_0c__ {
+		struct __0c {
+			u8 kstep_h: 8;
+		} bits;
+		u8 val;
+	} _0c;
+	union __reg_0d__ {
+		struct __0d {
+			u8 kstep_m: 8;
+		} bits;
+		u8 val;
+	} _0d;
+	union __reg_0e__ {
+		struct __0e {
+			u8 pll_pu_byp: 1;
+			u8 pll_pu: 1;
+			u8 hsbist_len: 2;
+			u8 stopstate_sel: 1;
+			u8 kstep_l: 3;
+		} bits;
+		u8 val;
+	} _0e;
+	union __reg_0f__ {
+		struct __0f {
+			u8 det_delay:2;
+			u8 kdelta: 4;
+			u8 ldo0p4:2;
+		} bits;
+		u8 val;
+	} _0f;
+};
+
+struct dphy_pll {
+	u8 refin; /* Pre-divider control signal */
+	u8 cp_s; /* 00: SDM_EN=1, 10: SDM_EN=0 */
+	u8 fdk_s; /* PLL mode control: integer or fraction */
+	u8 sdm_en;
+	u8 div;
+	u8 int_n; /* integer N PLL */
+	u32 ref_clk; /* dphy reference clock, unit: MHz */
+	u32 freq; /* panel config, unit: KHz */
+	u32 fvco;
+	u32 potential_fvco;
+	u32 nint; /* sigma delta modulator NINT control */
+	u32 kint; /* sigma delta modulator KINT control */
+	u8 lpf_sel; /* low pass filter control */
+	u8 out_sel; /* post divider control */
+	u8 vco_band; /* vco range */
+	u8 det_delay;
+
+	struct pll_reg reg;
+};
+
+struct dphy_context;
+
+int dphy_pll_config(struct dphy_context *ctx);
+void dphy_timing_config(struct dphy_context *ctx);
+
+#endif /* _MEGACORES_PLL_H_ */
\ No newline at end of file
diff --git a/drivers/gpu/drm/sprd/sprd_dphy.c b/drivers/gpu/drm/sprd/sprd_dphy.c
new file mode 100644
index 0000000..18abe78
--- /dev/null
+++ b/drivers/gpu/drm/sprd/sprd_dphy.c
@@ -0,0 +1,335 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include "sprd_drm.h"
+#include "sprd_dphy.h"
+#include "dw_dsi_ctrl_ppi.h"
+
+int dphy_wait_pll_locked(struct sprd_dphy *dphy)
+{
+	struct dphy_context *ctx = &dphy->ctx;
+	int i;
+
+	for (i = 0; i < 50000; i++) {
+		if (dsi_phy_is_pll_locked(ctx))
+			return 0;
+		udelay(3);
+	}
+
+	DRM_ERROR("error: dphy pll can not be locked\n");
+	return -ETIMEDOUT;
+}
+
+static int dphy_wait_datalane_stop_state(struct dphy_context *ctx, u8 mask)
+{
+	int i;
+
+	for (i = 0; i < 5000; i++) {
+		if (dsi_phy_is_stop_state_datalane(ctx) == mask)
+			return 0;
+		udelay(10);
+	}
+
+	DRM_ERROR("wait datalane stop-state time out\n");
+	return -ETIMEDOUT;
+}
+
+static int dphy_wait_datalane_ulps_active(struct dphy_context *ctx, u8 mask)
+{
+	int i;
+
+	for (i = 0; i < 5000; i++) {
+		if (dsi_phy_is_ulps_active_datalane(ctx) == mask)
+			return 0;
+		udelay(10);
+	}
+
+	DRM_ERROR("wait datalane ulps-active time out\n");
+	return -ETIMEDOUT;
+}
+
+static int dphy_wait_clklane_stop_state(struct dphy_context *ctx)
+{
+	int i;
+
+	for (i = 0; i < 5000; i++) {
+		if (dsi_phy_is_stop_state_clklane(ctx))
+			return 0;
+		udelay(10);
+	}
+
+	DRM_ERROR("wait clklane stop-state time out\n");
+	return -ETIMEDOUT;
+}
+
+static int dphy_wait_clklane_ulps_active(struct dphy_context *ctx)
+{
+	int i;
+
+	for (i = 0; i < 5000; i++) {
+		if (dsi_phy_is_ulps_active_clklane(ctx))
+			return 0;
+		udelay(10);
+	}
+
+	DRM_ERROR("wait clklane ulps-active time out\n");
+	return -ETIMEDOUT;
+}
+
+static int regmap_tst_io_write(void *context, u32 reg, u32 val)
+{
+	struct sprd_dphy *dphy = context;
+	struct dphy_context *ctx = &dphy->ctx;
+
+	if (val > 0xff || reg > 0xff)
+		return -EINVAL;
+
+	DRM_DEBUG("reg = 0x%02x, val = 0x%02x\n", reg, val);
+
+	dsi_phy_test_en(ctx, 1);
+	dsi_phy_test_din(ctx, reg);
+	dsi_phy_test_clk(ctx, 1);
+	dsi_phy_test_clk(ctx, 0);
+	dsi_phy_test_en(ctx, 0);
+	dsi_phy_test_din(ctx, val);
+	dsi_phy_test_clk(ctx, 1);
+	dsi_phy_test_clk(ctx, 0);
+
+	return 0;
+}
+
+static int regmap_tst_io_read(void *context, u32 reg, u32 *val)
+{
+	struct sprd_dphy *dphy = context;
+	struct dphy_context *ctx = &dphy->ctx;
+	int ret;
+
+	if (reg > 0xff)
+		return -EINVAL;
+
+	dsi_phy_test_en(ctx, 1);
+	dsi_phy_test_din(ctx, reg);
+	dsi_phy_test_clk(ctx, 1);
+	dsi_phy_test_clk(ctx, 0);
+	dsi_phy_test_en(ctx, 0);
+
+	udelay(1);
+
+	ret = dsi_phy_test_dout(ctx);
+	if (ret < 0)
+		return ret;
+
+	*val = ret;
+
+	DRM_DEBUG("reg = 0x%02x, val = 0x%02x\n", reg, *val);
+	return 0;
+}
+
+static struct regmap_bus regmap_tst_io = {
+	.reg_write = regmap_tst_io_write,
+	.reg_read = regmap_tst_io_read,
+};
+
+static const struct regmap_config byte_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static const struct regmap_config word_config = {
+	.reg_bits = 32,
+	.val_bits = 32,
+	.reg_stride = 4,
+};
+
+static int sprd_dphy_regmap_init(struct sprd_dphy *dphy)
+{
+	struct dphy_context *ctx = &dphy->ctx;
+	struct regmap *regmap;
+
+	if (ctx->apbbase)
+		regmap = devm_regmap_init_mmio(&dphy->dev,
+			(void __iomem *)ctx->apbbase, &word_config);
+	else
+		regmap = devm_regmap_init(&dphy->dev, &regmap_tst_io,
+					  dphy, &byte_config);
+
+	if (IS_ERR(regmap)) {
+		DRM_ERROR("dphy regmap init failed\n");
+		return PTR_ERR(regmap);
+	}
+
+	ctx->regmap = regmap;
+
+	return 0;
+}
+
+void sprd_dphy_ulps_enter(struct sprd_dphy *dphy)
+{
+	struct dphy_context *ctx = &dphy->ctx;
+	u8 lane_mask = (1 << ctx->lanes) - 1;
+
+	/* phy hs clk disable */
+	dsi_phy_clk_hs_rqst(ctx, false);
+	dphy_wait_pll_locked(dphy);
+
+	/* phy datalane ulps active */
+	dsi_phy_datalane_ulps_rqst(ctx, 1);
+	dphy_wait_datalane_ulps_active(ctx, lane_mask);
+	dsi_phy_datalane_ulps_rqst(ctx, 0);
+
+	/* phy clklane ulps active */
+	dsi_phy_clklane_ulps_rqst(ctx, 1);
+	dphy_wait_clklane_ulps_active(ctx);
+	dsi_phy_clklane_ulps_rqst(ctx, 0);
+}
+
+void sprd_dphy_ulps_exit(struct sprd_dphy *dphy)
+{
+	struct dphy_context *ctx = &dphy->ctx;
+	u8 lane_mask = (1 << ctx->lanes) - 1;
+
+	dsi_phy_force_pll(ctx, true);
+
+	/* phy clklane ulps exit */
+	dsi_phy_clklane_ulps_exit(ctx, 1);
+	dphy_wait_clklane_stop_state(ctx);
+	dsi_phy_clklane_ulps_exit(ctx, 0);
+
+	/* phy datelane ulps exit */
+	dsi_phy_datalane_ulps_exit(ctx, 1);
+	dphy_wait_datalane_stop_state(ctx, lane_mask);
+	dsi_phy_datalane_ulps_exit(ctx, 0);
+
+	dsi_phy_force_pll(ctx, false);
+}
+
+int sprd_dphy_init(struct sprd_dphy *dphy)
+{
+	struct dphy_context *ctx = &dphy->ctx;
+	int ret;
+
+	dsi_phy_rstz(ctx, 0);
+	dsi_phy_shutdownz(ctx, 0);
+	dsi_phy_clklane_en(ctx, 0);
+
+	dsi_phy_test_clr(ctx, 0);
+	dsi_phy_test_clr(ctx, 1);
+	dsi_phy_test_clr(ctx, 0);
+
+	dphy_pll_config(ctx);
+	dphy_timing_config(ctx);
+
+	dsi_phy_shutdownz(ctx, 1);
+	dsi_phy_rstz(ctx, 1);
+	dsi_phy_stop_wait_time(ctx, 0x1C);
+	dsi_phy_clklane_en(ctx, 1);
+	dsi_phy_datalane_en(ctx);
+
+	ret = dphy_wait_pll_locked(dphy);
+	if (ret) {
+		DRM_ERROR("sprd dphy initial failed\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+void sprd_dphy_fini(struct sprd_dphy *dphy)
+{
+	struct dphy_context *ctx = &dphy->ctx;
+
+	dsi_phy_rstz(ctx, 0);
+	dsi_phy_shutdownz(ctx, 0);
+	dsi_phy_rstz(ctx, 1);
+}
+
+static int sprd_dphy_context_init(struct sprd_dphy *dphy,
+				  struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dphy_context *ctx = &dphy->ctx;
+	struct resource *res;
+
+	ctx->pll = devm_kzalloc(dev, sizeof(*ctx->pll), GFP_KERNEL);
+	if (!ctx->pll)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	ctx->ctrlbase = (unsigned long)devm_ioremap(dev, res->start,
+					resource_size(res));
+	if (ctx->ctrlbase == 0) {
+		DRM_ERROR("failed to map dphy ctrl registers\n");
+		return -ENXIO;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (res) {
+		ctx->ctrlbase = (unsigned long)devm_ioremap(dev, res->start,
+					resource_size(res));
+		if (ctx->apbbase == 0) {
+			DRM_INFO("failed to map dphy apb registers\n");
+			return -ENXIO;
+		}
+	}
+
+	return 0;
+}
+
+static const struct of_device_id dphy_match_table[] = {
+	{ .compatible = "sprd,sharkl3-dsi-phy" },
+	{ /* sentinel */ },
+};
+
+static int sprd_dphy_probe(struct platform_device *pdev)
+{
+	struct sprd_dphy *dphy;
+	struct device *dsi_dev;
+	int ret;
+
+	dphy = devm_kzalloc(&pdev->dev, sizeof(*dphy), GFP_KERNEL);
+	if (!dphy)
+		return -ENOMEM;
+
+	dsi_dev = sprd_disp_pipe_get_input(&pdev->dev);
+	if (!dsi_dev)
+		return -ENODEV;
+
+	ret = sprd_dphy_context_init(dphy, &pdev->dev);
+	if (ret)
+		return ret;
+
+	ret = sprd_dphy_regmap_init(dphy);
+	if (ret)
+		return ret;
+
+	platform_set_drvdata(pdev, dphy);
+
+	return 0;
+}
+
+struct platform_driver sprd_dphy_driver = {
+	.probe	= sprd_dphy_probe,
+	.driver = {
+		.name  = "sprd-dphy-drv",
+		.of_match_table	= dphy_match_table,
+	}
+};
+
+MODULE_AUTHOR("Leon He <leon.he@unisoc.com>");
+MODULE_AUTHOR("Kevin Tang <kevin.tang@unisoc.com>");
+MODULE_DESCRIPTION("Unisoc MIPI DSI PHY driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/sprd/sprd_dphy.h b/drivers/gpu/drm/sprd/sprd_dphy.h
new file mode 100644
index 0000000..ae858ba
--- /dev/null
+++ b/drivers/gpu/drm/sprd/sprd_dphy.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#ifndef _SPRD_DPHY_H_
+#define _SPRD_DPHY_H_
+
+#include <asm/types.h>
+#include <linux/device.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#include <drm/drm_print.h>
+
+#include "megacores_pll.h"
+
+struct dphy_context {
+	struct dphy_pll *pll;
+	struct regmap *regmap;
+	unsigned long ctrlbase;
+	unsigned long apbbase;
+	u32 freq;
+	u8 lanes;
+};
+
+struct sprd_dphy {
+	struct device dev;
+	struct dphy_context ctx;
+};
+
+int dphy_wait_pll_locked(struct sprd_dphy *dphy);
+int sprd_dphy_init(struct sprd_dphy *dphy);
+void sprd_dphy_fini(struct sprd_dphy *dphy);
+void sprd_dphy_ulps_enter(struct sprd_dphy *dphy);
+void sprd_dphy_ulps_exit(struct sprd_dphy *dphy);
+
+#endif /* _SPRD_DPHY_H_ */
diff --git a/drivers/gpu/drm/sprd/sprd_dpu.c b/drivers/gpu/drm/sprd/sprd_dpu.c
index f6aa47b..973fb36 100644
--- a/drivers/gpu/drm/sprd/sprd_dpu.c
+++ b/drivers/gpu/drm/sprd/sprd_dpu.c
@@ -322,6 +322,28 @@ static int sprd_crtc_init(struct drm_device *drm, struct drm_crtc *crtc,
 	return 0;
 }
 
+void sprd_dpu_run(struct sprd_dpu *dpu)
+{
+	struct dpu_context *ctx = &dpu->ctx;
+
+	if (dpu->core->run)
+		dpu->core->run(ctx);
+
+	drm_crtc_vblank_on(&dpu->crtc);
+}
+
+void sprd_dpu_stop(struct sprd_dpu *dpu)
+{
+	struct dpu_context *ctx = &dpu->ctx;
+
+	if (dpu->core->stop)
+		dpu->core->stop(ctx);
+
+	drm_crtc_handle_vblank(&dpu->crtc);
+	drm_crtc_vblank_off(&dpu->crtc);
+}
+
+
 static void sprd_dpu_init(struct sprd_dpu *dpu)
 {
 	struct dpu_context *ctx = &dpu->ctx;
diff --git a/drivers/gpu/drm/sprd/sprd_dpu.h b/drivers/gpu/drm/sprd/sprd_dpu.h
index 88f34ed..b6ad155 100644
--- a/drivers/gpu/drm/sprd/sprd_dpu.h
+++ b/drivers/gpu/drm/sprd/sprd_dpu.h
@@ -211,4 +211,7 @@ layer_reg_wr(struct dpu_context *ctx, u32 offset, u32 cfg_bits, int index)
 
 extern const struct dpu_core_ops dpu_r2p0_core_ops;
 
+void sprd_dpu_run(struct sprd_dpu *dpu);
+void sprd_dpu_stop(struct sprd_dpu *dpu);
+
 #endif
diff --git a/drivers/gpu/drm/sprd/sprd_drm.c b/drivers/gpu/drm/sprd/sprd_drm.c
index ca93be2..a57e079 100644
--- a/drivers/gpu/drm/sprd/sprd_drm.c
+++ b/drivers/gpu/drm/sprd/sprd_drm.c
@@ -27,6 +27,46 @@
 #define DRIVER_MAJOR	1
 #define DRIVER_MINOR	0
 
+static struct device *sprd_disp_pipe_get_by_port(struct device *dev, int port)
+{
+	struct device_node *np = dev->of_node;
+	struct device_node *endpoint;
+	struct device_node *remote_node;
+	struct platform_device *remote_pdev;
+
+	endpoint = of_graph_get_endpoint_by_regs(np, port, 0);
+	if (!endpoint) {
+		DRM_ERROR("%s/port%d/endpoint0 was not found\n",
+			  np->full_name, port);
+		return NULL;
+	}
+
+	remote_node = of_graph_get_remote_port_parent(endpoint);
+	if (!remote_node) {
+		DRM_ERROR("device node was not found by endpoint0\n");
+		return NULL;
+	}
+
+	remote_pdev = of_find_device_by_node(remote_node);
+	if (remote_pdev == NULL) {
+		DRM_ERROR("find %s platform device failed\n",
+			  remote_node->full_name);
+		return NULL;
+	}
+
+	return &remote_pdev->dev;
+}
+
+struct device *sprd_disp_pipe_get_input(struct device *dev)
+{
+	return sprd_disp_pipe_get_by_port(dev, 1);
+}
+
+struct device *sprd_disp_pipe_get_output(struct device *dev)
+{
+	return sprd_disp_pipe_get_by_port(dev, 0);
+}
+
 static const struct drm_mode_config_helper_funcs sprd_drm_mode_config_helper = {
 	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
 };
diff --git a/drivers/gpu/drm/sprd/sprd_drm.h b/drivers/gpu/drm/sprd/sprd_drm.h
index 85d4a8b..bfd374c 100644
--- a/drivers/gpu/drm/sprd/sprd_drm.h
+++ b/drivers/gpu/drm/sprd/sprd_drm.h
@@ -13,6 +13,8 @@ struct sprd_drm {
 	struct drm_device drm;
 };
 
+struct device *sprd_disp_pipe_get_input(struct device *dev);
+struct device *sprd_disp_pipe_get_output(struct device *dev);
 extern struct platform_driver sprd_dpu_driver;
 
 #endif /* _SPRD_DRM_H_ */
diff --git a/drivers/gpu/drm/sprd/sprd_dsi.c b/drivers/gpu/drm/sprd/sprd_dsi.c
new file mode 100644
index 0000000..09f6a9b
--- /dev/null
+++ b/drivers/gpu/drm/sprd/sprd_dsi.c
@@ -0,0 +1,1102 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#include <linux/component.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/of_graph.h>
+#include <video/mipi_display.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_of.h>
+#include <drm/drm_probe_helper.h>
+
+#include "sprd_drm.h"
+#include "sprd_dpu.h"
+#include "sprd_dsi.h"
+#include "sprd_dphy.h"
+#include "dw_dsi_ctrl.h"
+#include "dw_dsi_ctrl_ppi.h"
+
+#define encoder_to_dsi(encoder) \
+	container_of(encoder, struct sprd_dsi, encoder)
+#define host_to_dsi(host) \
+	container_of(host, struct sprd_dsi, host)
+#define connector_to_dsi(connector) \
+	container_of(connector, struct sprd_dsi, connector)
+
+static int dsi_wait_tx_payload_fifo_empty(struct dsi_context *ctx)
+{
+	int i;
+
+	for (i = 0; i < 5000; i++) {
+		if (dsi_is_tx_payload_fifo_empty(ctx))
+			return 0;
+		udelay(1);
+	}
+
+	return -ETIMEDOUT;
+}
+
+static int dsi_wait_tx_cmd_fifo_empty(struct dsi_context *ctx)
+{
+	int i;
+
+	for (i = 0; i < 5000; i++) {
+		if (dsi_is_tx_cmd_fifo_empty(ctx))
+			return 0;
+		udelay(1);
+	}
+
+	return -ETIMEDOUT;
+}
+
+static int dsi_wait_rd_resp_completed(struct dsi_context *ctx)
+{
+	int i;
+
+	for (i = 0; i < 10000; i++) {
+		if (dsi_is_bta_returned(ctx))
+			return 0;
+		udelay(10);
+	}
+
+	return -ETIMEDOUT;
+}
+
+static u16 calc_bytes_per_pixel_x100(int coding)
+{
+	u16 Bpp_x100;
+
+	switch (coding) {
+	case COLOR_CODE_16BIT_CONFIG1:
+	case COLOR_CODE_16BIT_CONFIG2:
+	case COLOR_CODE_16BIT_CONFIG3:
+		Bpp_x100 = 200;
+		break;
+	case COLOR_CODE_18BIT_CONFIG1:
+	case COLOR_CODE_18BIT_CONFIG2:
+		Bpp_x100 = 225;
+		break;
+	case COLOR_CODE_24BIT:
+		Bpp_x100 = 300;
+		break;
+	case COLOR_CODE_COMPRESSTION:
+		Bpp_x100 = 100;
+		break;
+	case COLOR_CODE_20BIT_YCC422_LOOSELY:
+		Bpp_x100 = 250;
+		break;
+	case COLOR_CODE_24BIT_YCC422:
+		Bpp_x100 = 300;
+		break;
+	case COLOR_CODE_16BIT_YCC422:
+		Bpp_x100 = 200;
+		break;
+	case COLOR_CODE_30BIT:
+		Bpp_x100 = 375;
+		break;
+	case COLOR_CODE_36BIT:
+		Bpp_x100 = 450;
+		break;
+	case COLOR_CODE_12BIT_YCC420:
+		Bpp_x100 = 150;
+		break;
+	default:
+		DRM_ERROR("invalid color coding");
+		Bpp_x100 = 0;
+		break;
+	}
+
+	return Bpp_x100;
+}
+
+static u8 calc_video_size_step(int coding)
+{
+	u8 video_size_step;
+
+	switch (coding) {
+	case COLOR_CODE_16BIT_CONFIG1:
+	case COLOR_CODE_16BIT_CONFIG2:
+	case COLOR_CODE_16BIT_CONFIG3:
+	case COLOR_CODE_18BIT_CONFIG1:
+	case COLOR_CODE_18BIT_CONFIG2:
+	case COLOR_CODE_24BIT:
+	case COLOR_CODE_COMPRESSTION:
+		return video_size_step = 1;
+	case COLOR_CODE_20BIT_YCC422_LOOSELY:
+	case COLOR_CODE_24BIT_YCC422:
+	case COLOR_CODE_16BIT_YCC422:
+	case COLOR_CODE_30BIT:
+	case COLOR_CODE_36BIT:
+	case COLOR_CODE_12BIT_YCC420:
+		return video_size_step = 2;
+	default:
+		DRM_ERROR("invalid color coding");
+		return 0;
+	}
+}
+
+static u16 round_video_size(int coding, u16 video_size)
+{
+	switch (coding) {
+	case COLOR_CODE_16BIT_YCC422:
+	case COLOR_CODE_24BIT_YCC422:
+	case COLOR_CODE_20BIT_YCC422_LOOSELY:
+	case COLOR_CODE_12BIT_YCC420:
+		/* round up active H pixels to a multiple of 2 */
+		if ((video_size % 2) != 0)
+			video_size += 1;
+		break;
+	default:
+		break;
+	}
+
+	return video_size;
+}
+
+#define SPRD_MIPI_DSI_FMT_DSC 0xff
+static u32 fmt_to_coding(u32 fmt)
+{
+	switch (fmt) {
+	case MIPI_DSI_FMT_RGB565:
+		return COLOR_CODE_16BIT_CONFIG1;
+	case MIPI_DSI_FMT_RGB666:
+	case MIPI_DSI_FMT_RGB666_PACKED:
+		return COLOR_CODE_18BIT_CONFIG1;
+	case MIPI_DSI_FMT_RGB888:
+		return COLOR_CODE_24BIT;
+	case SPRD_MIPI_DSI_FMT_DSC:
+		return COLOR_CODE_COMPRESSTION;
+	default:
+		DRM_ERROR("Unsupported format (%d)\n", fmt);
+		return COLOR_CODE_24BIT;
+	}
+}
+
+#define ns_to_cycle(ns, byte_clk) \
+	DIV_ROUND_UP((ns) * (byte_clk), 1000000)
+
+void sprd_dsi_init(struct sprd_dsi *dsi)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+	u16 data_hs2lp, data_lp2hs, clk_hs2lp, clk_lp2hs;
+	u16 max_rd_time;
+	int div;
+
+	dsi_power_enable(ctx, 0);
+	dsi_int0_mask(ctx, 0xffffffff);
+	dsi_int1_mask(ctx, 0xffffffff);
+	dsi_cmd_mode(ctx);
+	dsi_eotp_rx_en(ctx, 0);
+	dsi_eotp_tx_en(ctx, 0);
+	dsi_ecc_rx_en(ctx, 1);
+	dsi_crc_rx_en(ctx, 1);
+	dsi_bta_en(ctx, 1);
+	dsi_video_vcid(ctx, 0);
+	dsi_rx_vcid(ctx, 0);
+
+	div = DIV_ROUND_UP(ctx->byte_clk, ctx->esc_clk);
+	dsi_tx_escape_division(ctx, div);
+
+	max_rd_time = ns_to_cycle(ctx->max_rd_time, ctx->byte_clk);
+	dsi_max_read_time(ctx, max_rd_time);
+
+	data_hs2lp = ns_to_cycle(ctx->data_hs2lp, ctx->byte_clk);
+	data_lp2hs = ns_to_cycle(ctx->data_lp2hs, ctx->byte_clk);
+	clk_hs2lp = ns_to_cycle(ctx->clk_hs2lp, ctx->byte_clk);
+	clk_lp2hs = ns_to_cycle(ctx->clk_lp2hs, ctx->byte_clk);
+	dsi_datalane_hs2lp_config(ctx, data_hs2lp);
+	dsi_datalane_lp2hs_config(ctx, data_lp2hs);
+	dsi_clklane_hs2lp_config(ctx, clk_hs2lp);
+	dsi_clklane_lp2hs_config(ctx, clk_lp2hs);
+
+	dsi_power_enable(ctx, 1);
+}
+
+/*
+ * Free up resources and shutdown host controller and PHY
+ */
+void sprd_dsi_fini(struct sprd_dsi *dsi)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+
+	dsi_int0_mask(ctx, 0xffffffff);
+	dsi_int1_mask(ctx, 0xffffffff);
+	dsi_power_enable(ctx, 0);
+}
+
+/*
+ * If not in burst mode, it will compute the video and null packet sizes
+ * according to necessity.
+ * Configure timers for data lanes and/or clock lane to return to LP when
+ * bandwidth is not filled by data.
+ */
+int sprd_dsi_dpi_video(struct sprd_dsi *dsi)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+	struct videomode *vm = &dsi->ctx.vm;
+	u16 Bpp_x100;
+	u16 video_size;
+	u32 ratio_x1000;
+	u16 null_pkt_size = 0;
+	u8 video_size_step;
+	u32 hs_to;
+	u32 total_bytes;
+	u32 bytes_per_chunk;
+	u32 chunks = 0;
+	u32 bytes_left = 0;
+	u32 chunk_overhead;
+	const u8 pkt_header = 6;
+	u8 coding;
+	int div;
+	u16 hline;
+
+	coding = fmt_to_coding(ctx->format);
+	video_size = round_video_size(coding, vm->hactive);
+	Bpp_x100 = calc_bytes_per_pixel_x100(coding);
+	video_size_step = calc_video_size_step(coding);
+	ratio_x1000 = ctx->byte_clk * 1000 / (vm->pixelclock / 1000);
+	hline = vm->hactive + vm->hsync_len + vm->hfront_porch +
+		vm->hback_porch;
+
+	dsi_power_enable(ctx, 0);
+	dsi_dpi_frame_ack_en(ctx, ctx->frame_ack_en);
+	dsi_dpi_color_coding(ctx, coding);
+	dsi_dpi_video_burst_mode(ctx, ctx->burst_mode);
+	dsi_dpi_sig_delay(ctx, 95 * hline * ratio_x1000 / 100000);
+	dsi_dpi_hline_time(ctx, hline * ratio_x1000 / 1000);
+	dsi_dpi_hsync_time(ctx, vm->hsync_len * ratio_x1000 / 1000);
+	dsi_dpi_hbp_time(ctx, vm->hback_porch * ratio_x1000 / 1000);
+	dsi_dpi_vact(ctx, vm->vactive);
+	dsi_dpi_vfp(ctx, vm->vfront_porch);
+	dsi_dpi_vbp(ctx, vm->vback_porch);
+	dsi_dpi_vsync(ctx, vm->vsync_len);
+	dsi_dpi_hporch_lp_en(ctx, 1);
+	dsi_dpi_vporch_lp_en(ctx, 1);
+
+	hs_to = (hline * vm->vactive) + (2 * Bpp_x100) / 100;
+	for (div = 0x80; (div < hs_to) && (div > 2); div--) {
+		if ((hs_to % div) == 0) {
+			dsi_timeout_clock_division(ctx, div);
+			dsi_lp_rx_timeout(ctx, hs_to / div);
+			dsi_hs_tx_timeout(ctx, hs_to / div);
+			break;
+		}
+	}
+
+	if (ctx->burst_mode == VIDEO_BURST_WITH_SYNC_PULSES) {
+		dsi_dpi_video_packet_size(ctx, video_size);
+		dsi_dpi_null_packet_size(ctx, 0);
+		dsi_dpi_chunk_num(ctx, 0);
+	} else {
+		/* non burst transmission */
+		null_pkt_size = 0;
+
+		/* bytes to be sent - first as one chunk */
+		bytes_per_chunk = vm->hactive * Bpp_x100 / 100 + pkt_header;
+
+		/* hline total bytes from the DPI interface */
+		total_bytes = (vm->hactive + vm->hfront_porch) *
+				ratio_x1000 / ctx->lanes / 1000;
+
+		/* check if the pixels actually fit on the DSI link */
+		if (total_bytes < bytes_per_chunk) {
+			DRM_ERROR("current resolution can not be set\n");
+			return -EINVAL;
+		}
+
+		chunk_overhead = total_bytes - bytes_per_chunk;
+
+		/* overhead higher than 1 -> enable multi packets */
+		if (chunk_overhead > 1) {
+
+			/* multi packets */
+			for (video_size = video_size_step;
+			     video_size < vm->hactive;
+			     video_size += video_size_step) {
+
+				if (vm->hactive * 1000 / video_size % 1000)
+					continue;
+
+				chunks = vm->hactive / video_size;
+				bytes_per_chunk = Bpp_x100 * video_size / 100
+						  + pkt_header;
+				if (total_bytes >= (bytes_per_chunk * chunks)) {
+					bytes_left = total_bytes -
+						     bytes_per_chunk * chunks;
+					break;
+				}
+			}
+
+			/* prevent overflow (unsigned - unsigned) */
+			if (bytes_left > (pkt_header * chunks)) {
+				null_pkt_size = (bytes_left -
+						pkt_header * chunks) / chunks;
+				/* avoid register overflow */
+				if (null_pkt_size > 1023)
+					null_pkt_size = 1023;
+			}
+
+		} else {
+
+			/* single packet */
+			chunks = 1;
+
+			/* must be a multiple of 4 except 18 loosely */
+			for (video_size = vm->hactive;
+			    (video_size % video_size_step) != 0;
+			     video_size++)
+				;
+		}
+
+		dsi_dpi_video_packet_size(ctx, video_size);
+		dsi_dpi_null_packet_size(ctx, null_pkt_size);
+		dsi_dpi_chunk_num(ctx, chunks);
+	}
+
+	dsi_int0_mask(ctx, ctx->int0_mask);
+	dsi_int1_mask(ctx, ctx->int1_mask);
+	dsi_power_enable(ctx, 1);
+
+	return 0;
+}
+
+void sprd_dsi_edpi_video(struct sprd_dsi *dsi)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+	const u32 fifo_depth = 1096;
+	const u32 word_length = 4;
+	u32 hactive = ctx->vm.hactive;
+	u32 Bpp_x100;
+	u32 max_fifo_len;
+	u8 coding;
+
+	coding = fmt_to_coding(ctx->format);
+	Bpp_x100 = calc_bytes_per_pixel_x100(coding);
+	max_fifo_len = word_length * fifo_depth * 100 / Bpp_x100;
+
+	dsi_power_enable(ctx, 0);
+	dsi_dpi_color_coding(ctx, coding);
+	dsi_tear_effect_ack_en(ctx, ctx->te_ack_en);
+
+	if (max_fifo_len > hactive)
+		dsi_edpi_max_pkt_size(ctx, hactive);
+	else
+		dsi_edpi_max_pkt_size(ctx, max_fifo_len);
+
+	dsi_int0_mask(ctx, ctx->int0_mask);
+	dsi_int1_mask(ctx, ctx->int1_mask);
+	dsi_power_enable(ctx, 1);
+}
+
+/*
+ * Send a packet on the generic interface,
+ * this function has an active delay to wait for the buffer to clear.
+ * The delay is limited to:
+ * (param_length / 4) x DSIH_FIFO_ACTIVE_WAIT x register access time
+ * the controller restricts the sending of.
+ * 
+ * This function will not be able to send Null and Blanking packets due to
+ * controller restriction
+ */
+int sprd_dsi_wr_pkt(struct sprd_dsi *dsi, u8 vc, u8 type,
+			const u8 *param, u16 len)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+	u8 wc_lsbyte, wc_msbyte;
+	u32 payload;
+	int i, j, ret;
+
+	if (vc > 3)
+		return -EINVAL;
+
+
+	/* 1st: for long packet, must config payload first */
+	ret = dsi_wait_tx_payload_fifo_empty(ctx);
+	if (ret) {
+		DRM_ERROR("tx payload fifo is not empty\n");
+		return ret;
+	}
+
+	if (len > 2) {
+		for (i = 0, j = 0; i < len; i += j) {
+			payload = 0;
+			for (j = 0; (j < 4) && ((j + i) < (len)); j++)
+				payload |= param[i + j] << (j * 8);
+
+			dsi_set_packet_payload(ctx, payload);
+		}
+		wc_lsbyte = len & 0xff;
+		wc_msbyte = len >> 8;
+	} else {
+		wc_lsbyte = (len > 0) ? param[0] : 0;
+		wc_msbyte = (len > 1) ? param[1] : 0;
+	}
+
+	/* 2nd: then set packet header */
+	ret = dsi_wait_tx_cmd_fifo_empty(ctx);
+	if (ret) {
+		DRM_ERROR("tx cmd fifo is not empty\n");
+		return ret;
+	}
+
+	dsi_set_packet_header(ctx, vc, type, wc_lsbyte, wc_msbyte);
+
+	return 0;
+}
+
+/*
+ * Send READ packet to peripheral using the generic interface,
+ * this will force command mode and stop video mode (because of BTA).
+ * 
+ * This function has an active delay to wait for the buffer to clear,
+ * the delay is limited to 2 x DSIH_FIFO_ACTIVE_WAIT
+ * (waiting for command buffer, and waiting for receiving)
+ * @note this function will enable BTA
+ */
+int sprd_dsi_rd_pkt(struct sprd_dsi *dsi, u8 vc, u8 type,
+			u8 msb_byte, u8 lsb_byte,
+			u8 *buffer, u8 bytes_to_read)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+	int i, ret;
+	int count = 0;
+	u32 temp;
+
+	if (vc > 3)
+		return -EINVAL;
+
+	/* 1st: send read command to peripheral */
+	if (!dsi_is_tx_cmd_fifo_empty(ctx))
+		return -EIO;
+
+	dsi_set_packet_header(ctx, vc, type, lsb_byte, msb_byte);
+
+	/* 2nd: wait peripheral response completed */
+	ret = dsi_wait_rd_resp_completed(ctx);
+	if (ret) {
+		DRM_ERROR("wait read response time out\n");
+		return ret;
+	}
+
+	/* 3rd: get data from rx payload fifo */
+	if (dsi_is_rx_payload_fifo_empty(ctx)) {
+		DRM_ERROR("rx payload fifo empty\n");
+		return -EIO;
+	}
+
+	for (i = 0; i < 100; i++) {
+		temp = dsi_get_rx_payload(ctx);
+
+		if (count < bytes_to_read)
+			buffer[count++] = temp & 0xff;
+		if (count < bytes_to_read)
+			buffer[count++] = (temp >> 8) & 0xff;
+		if (count < bytes_to_read)
+			buffer[count++] = (temp >> 16) & 0xff;
+		if (count < bytes_to_read)
+			buffer[count++] = (temp >> 24) & 0xff;
+
+		if (dsi_is_rx_payload_fifo_empty(ctx))
+			return count;
+		else {
+			DRM_ERROR("read too many buffers\n");
+			return -EIO;
+		}
+	}
+
+	return 0;
+}
+
+void sprd_dsi_set_work_mode(struct sprd_dsi *dsi, u8 mode)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+
+	if (mode == DSI_MODE_CMD)
+		dsi_cmd_mode(ctx);
+	else
+		dsi_video_mode(ctx);
+}
+
+int sprd_dsi_get_work_mode(struct sprd_dsi *dsi)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+
+	if (dsi_is_cmd_mode(ctx))
+		return DSI_MODE_CMD;
+	else
+		return DSI_MODE_VIDEO;
+}
+
+void sprd_dsi_lp_cmd_enable(struct sprd_dsi *dsi, bool enable)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+
+	if (dsi_is_cmd_mode(ctx))
+		dsi_cmd_mode_lp_cmd_en(ctx, enable);
+	else
+		dsi_video_mode_lp_cmd_en(ctx, enable);
+}
+
+void sprd_dsi_state_reset(struct sprd_dsi *dsi)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+
+	dsi_power_enable(ctx, 0);
+	udelay(100);
+	dsi_power_enable(ctx, 1);
+}
+
+u32 sprd_dsi_int_status(struct sprd_dsi *dsi, int index)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+	u32 status;
+
+	if (0 == index)
+		status = dsi_int0_status(ctx);
+	else if (1 == index)
+		status = dsi_int1_status(ctx);
+	else {
+		DRM_ERROR("invalid dsi IRQ index %d\n", index);
+		status = -EINVAL;
+	}
+
+	return status;
+}
+
+static void sprd_dsi_encoder_enable(struct drm_encoder *encoder)
+{
+	struct sprd_dsi *dsi = encoder_to_dsi(encoder);
+	struct sprd_dpu *dpu = crtc_to_dpu(encoder->crtc);
+
+	if (dsi->ctx.enabled) {
+		DRM_ERROR("dsi is initialized\n");
+		return;
+	}
+
+	sprd_dsi_init(dsi);
+	if (dsi->ctx.work_mode == DSI_MODE_VIDEO)
+		sprd_dsi_dpi_video(dsi);
+	else
+		sprd_dsi_edpi_video(dsi);
+
+	sprd_dphy_init(dsi->phy);
+
+	sprd_dsi_lp_cmd_enable(dsi, true);
+
+	if (dsi->panel) {
+		drm_panel_prepare(dsi->panel);
+		drm_panel_enable(dsi->panel);
+	}
+
+	sprd_dsi_set_work_mode(dsi, dsi->ctx.work_mode);
+	sprd_dsi_state_reset(dsi);
+
+	if (dsi->ctx.nc_clk_en)
+		dsi_nc_clk_en(&dsi->ctx, true);
+	else {
+		dsi_phy_clk_hs_rqst(&dsi->phy->ctx, true);
+		dphy_wait_pll_locked(dsi->phy);
+	}
+
+	sprd_dpu_run(dpu);
+
+	dsi->ctx.enabled = true;
+}
+
+static void sprd_dsi_encoder_disable(struct drm_encoder *encoder)
+{
+	struct sprd_dsi *dsi = encoder_to_dsi(encoder);
+	struct sprd_dpu *dpu = crtc_to_dpu(encoder->crtc);
+
+	if (!dsi->ctx.enabled) {
+		DRM_ERROR("dsi isn't initialized\n");
+		return;
+	}
+
+	sprd_dpu_stop(dpu);
+	sprd_dsi_set_work_mode(dsi, DSI_MODE_CMD);
+	sprd_dsi_lp_cmd_enable(dsi, true);
+
+	if (dsi->panel) {
+		drm_panel_disable(dsi->panel);
+		sprd_dphy_ulps_enter(dsi->phy);
+		drm_panel_unprepare(dsi->panel);
+	}
+
+	sprd_dphy_fini(dsi->phy);
+	sprd_dsi_fini(dsi);
+
+	dsi->ctx.enabled = false;
+}
+
+static void sprd_dsi_encoder_mode_set(struct drm_encoder *encoder,
+				 struct drm_display_mode *mode,
+				 struct drm_display_mode *adj_mode)
+{
+	struct sprd_dsi *dsi = encoder_to_dsi(encoder);
+
+	DRM_DEBUG("%s() set mode: %s\n", __func__, dsi->mode->name);
+}
+
+static int sprd_dsi_encoder_atomic_check(struct drm_encoder *encoder,
+				    struct drm_crtc_state *crtc_state,
+				    struct drm_connector_state *conn_state)
+{
+	return 0;
+}
+
+static const struct drm_encoder_helper_funcs sprd_encoder_helper_funcs = {
+	.atomic_check	= sprd_dsi_encoder_atomic_check,
+	.mode_set	= sprd_dsi_encoder_mode_set,
+	.enable		= sprd_dsi_encoder_enable,
+	.disable	= sprd_dsi_encoder_disable
+};
+
+static const struct drm_encoder_funcs sprd_encoder_funcs = {
+	.destroy = drm_encoder_cleanup,
+};
+
+static int sprd_dsi_encoder_init(struct drm_device *drm,
+			       struct sprd_dsi *dsi)
+{
+	struct drm_encoder *encoder = &dsi->encoder;
+	struct device *dev = dsi->host.dev;
+	u32 crtc_mask;
+	int ret;
+
+	crtc_mask = drm_of_find_possible_crtcs(drm, dev->of_node);
+	if (!crtc_mask) {
+		DRM_ERROR("failed to find crtc mask\n");
+		return -EINVAL;
+	}
+
+	DRM_DEBUG("find possible crtcs: 0x%08x\n", crtc_mask);
+
+	encoder->possible_crtcs = crtc_mask;
+	ret = drm_encoder_init(drm, encoder, &sprd_encoder_funcs,
+			       DRM_MODE_ENCODER_DSI, NULL);
+	if (ret) {
+		DRM_ERROR("failed to init dsi encoder\n");
+		return ret;
+	}
+
+	drm_encoder_helper_add(encoder, &sprd_encoder_helper_funcs);
+
+	return 0;
+}
+
+static int sprd_dsi_find_panel(struct sprd_dsi *dsi)
+{
+	struct device *dev = dsi->host.dev;
+	struct device_node *child, *lcds_node;
+	struct drm_panel *panel;
+
+	/* search /lcds child node first */
+	lcds_node = of_find_node_by_path("/lcds");
+	for_each_child_of_node(lcds_node, child) {
+		panel = of_drm_find_panel(child);
+		if (panel) {
+			dsi->panel = panel;
+			return 0;
+		}
+	}
+
+	/*
+	 * If /lcds child node search failed, we search
+	 * the child of dsi host node.
+	 */
+	for_each_child_of_node(dev->of_node, child) {
+		panel = of_drm_find_panel(child);
+		if (panel) {
+			dsi->panel = panel;
+			return 0;
+		}
+	}
+
+	DRM_ERROR("of_drm_find_panel() failed\n");
+	return -ENODEV;
+}
+
+static int sprd_dsi_phy_attach(struct sprd_dsi *dsi)
+{
+	struct device *dev;
+
+	dev = sprd_disp_pipe_get_output(&dsi->dev);
+	if (!dev)
+		return -ENODEV;
+
+	dsi->phy = dev_get_drvdata(dev);
+	if (!dsi->phy) {
+		DRM_ERROR("dsi attach phy failed\n");
+		return -EINVAL;
+	}
+
+	dsi->phy->ctx.lanes = dsi->ctx.lanes;
+	dsi->phy->ctx.freq = dsi->ctx.byte_clk * 8;
+
+	return 0;
+}
+
+static int sprd_dsi_host_attach(struct mipi_dsi_host *host,
+			   struct mipi_dsi_device *slave)
+{
+	struct sprd_dsi *dsi = host_to_dsi(host);
+	struct dsi_context *ctx = &dsi->ctx;
+	int ret;
+
+	dsi->slave = slave;
+	ctx->lanes = slave->lanes;
+	ctx->format = slave->format;
+	ctx->byte_clk = slave->hs_rate / 8;
+	ctx->esc_clk = slave->lp_rate;
+
+	if (slave->mode_flags & MIPI_DSI_MODE_VIDEO)
+		ctx->work_mode = DSI_MODE_VIDEO;
+	else
+		ctx->work_mode = DSI_MODE_CMD;
+
+	if (slave->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
+		ctx->burst_mode = VIDEO_BURST_WITH_SYNC_PULSES;
+	else if (slave->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+		ctx->burst_mode = VIDEO_NON_BURST_WITH_SYNC_PULSES;
+	else
+		ctx->burst_mode = VIDEO_NON_BURST_WITH_SYNC_EVENTS;
+
+	if (slave->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)
+		ctx->nc_clk_en = true;
+
+	ret = sprd_dsi_phy_attach(dsi);
+	if (ret)
+		return ret;
+
+	ret = sprd_dsi_find_panel(dsi);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int sprd_dsi_host_detach(struct mipi_dsi_host *host,
+			   struct mipi_dsi_device *slave)
+{
+	/* do nothing */
+	return 0;
+}
+
+static ssize_t sprd_dsi_host_transfer(struct mipi_dsi_host *host,
+				const struct mipi_dsi_msg *msg)
+{
+	struct sprd_dsi *dsi = host_to_dsi(host);
+	const u8 *tx_buf = msg->tx_buf;
+
+	if (msg->rx_buf && msg->rx_len) {
+		u8 lsb = (msg->tx_len > 0) ? tx_buf[0] : 0;
+		u8 msb = (msg->tx_len > 1) ? tx_buf[1] : 0;
+
+		return sprd_dsi_rd_pkt(dsi, msg->channel, msg->type,
+				msb, lsb, msg->rx_buf, msg->rx_len);
+	}
+
+	if (msg->tx_buf && msg->tx_len)
+		return sprd_dsi_wr_pkt(dsi, msg->channel, msg->type,
+					tx_buf, msg->tx_len);
+
+	return 0;
+}
+
+static const struct mipi_dsi_host_ops sprd_dsi_host_ops = {
+	.attach = sprd_dsi_host_attach,
+	.detach = sprd_dsi_host_detach,
+	.transfer = sprd_dsi_host_transfer,
+};
+
+static int sprd_dsi_host_init(struct sprd_dsi *dsi, struct device *dev)
+{
+	int ret;
+
+	dsi->host.dev = dev;
+	dsi->host.ops = &sprd_dsi_host_ops;
+
+	ret = mipi_dsi_host_register(&dsi->host);
+	if (ret)
+		DRM_ERROR("failed to register dsi host\n");
+
+	return ret;
+}
+
+static int sprd_dsi_connector_get_modes(struct drm_connector *connector)
+{
+	struct sprd_dsi *dsi = connector_to_dsi(connector);
+
+	return drm_panel_get_modes(dsi->panel, connector);
+}
+
+static enum drm_mode_status
+sprd_dsi_connector_mode_valid(struct drm_connector *connector,
+			 struct drm_display_mode *mode)
+{
+	struct sprd_dsi *dsi = connector_to_dsi(connector);
+
+	DRM_DEBUG("%s() mode: "DRM_MODE_FMT"\n", __func__, DRM_MODE_ARG(mode));
+
+	if (mode->type & DRM_MODE_TYPE_PREFERRED) {
+		dsi->mode = mode;
+		drm_display_mode_to_videomode(dsi->mode, &dsi->ctx.vm);
+	}
+
+	return MODE_OK;
+}
+
+static struct drm_encoder *
+sprd_dsi_connector_best_encoder(struct drm_connector *connector)
+{
+	struct sprd_dsi *dsi = connector_to_dsi(connector);
+
+	return &dsi->encoder;
+}
+
+static struct drm_connector_helper_funcs sprd_dsi_connector_helper_funcs = {
+	.get_modes = sprd_dsi_connector_get_modes,
+	.mode_valid = sprd_dsi_connector_mode_valid,
+	.best_encoder = sprd_dsi_connector_best_encoder,
+};
+
+static enum drm_connector_status
+sprd_dsi_connector_detect(struct drm_connector *connector, bool force)
+{
+	struct sprd_dsi *dsi = connector_to_dsi(connector);
+
+	if (dsi->panel) {
+		drm_panel_attach(dsi->panel, connector);
+		return connector_status_connected;
+	}
+
+	return connector_status_disconnected;
+}
+
+static void sprd_dsi_connector_destroy(struct drm_connector *connector)
+{
+	drm_connector_unregister(connector);
+	drm_connector_cleanup(connector);
+}
+
+static const struct drm_connector_funcs sprd_dsi_atomic_connector_funcs = {
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.detect = sprd_dsi_connector_detect,
+	.destroy = sprd_dsi_connector_destroy,
+	.reset = drm_atomic_helper_connector_reset,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int sprd_dsi_connector_init(struct drm_device *drm, struct sprd_dsi *dsi)
+{
+	struct drm_encoder *encoder = &dsi->encoder;
+	struct drm_connector *connector = &dsi->connector;
+	int ret;
+
+	connector->polled = DRM_CONNECTOR_POLL_HPD;
+
+	ret = drm_connector_init(drm, connector,
+				 &sprd_dsi_atomic_connector_funcs,
+				 DRM_MODE_CONNECTOR_DSI);
+	if (ret) {
+		DRM_ERROR("drm_connector_init() failed\n");
+		return ret;
+	}
+
+	drm_connector_helper_add(connector,
+				 &sprd_dsi_connector_helper_funcs);
+
+	drm_connector_attach_encoder(connector, encoder);
+
+	return 0;
+}
+
+static int sprd_dsi_bridge_attach(struct sprd_dsi *dsi)
+{
+	struct drm_encoder *encoder = &dsi->encoder;
+	struct drm_bridge *bridge = dsi->bridge;
+	struct device *dev = dsi->host.dev;
+	struct device_node *bridge_node;
+	int ret;
+
+	bridge_node = of_graph_get_remote_node(dev->of_node, 2, 0);
+	if (!bridge_node)
+		return 0;
+
+	bridge = of_drm_find_bridge(bridge_node);
+	if (!bridge) {
+		DRM_ERROR("of_drm_find_bridge() failed\n");
+		return -ENODEV;
+	}
+	dsi->bridge = bridge;
+
+	ret = drm_bridge_attach(encoder, bridge, NULL, 0);
+	if (ret) {
+		DRM_ERROR("failed to attach external bridge\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static irqreturn_t sprd_dsi_isr(int irq, void *data)
+{
+	u32 status = 0;
+	struct sprd_dsi *dsi = data;
+
+	if (dsi->ctx.irq0 == irq)
+		status = sprd_dsi_int_status(dsi, 0);
+	else if (dsi->ctx.irq1 == irq)
+		status = sprd_dsi_int_status(dsi, 1);
+
+	if (status & DSI_INT_STS_NEED_SOFT_RESET)
+		sprd_dsi_state_reset(dsi);
+
+	return IRQ_HANDLED;
+}
+
+static int sprd_dsi_bind(struct device *dev, struct device *master, void *data)
+{
+	struct drm_device *drm = data;
+	struct sprd_dsi *dsi = dev_get_drvdata(dev);
+	int ret;
+
+	ret = sprd_dsi_encoder_init(drm, dsi);
+	if (ret)
+		goto cleanup_host;
+
+	ret = sprd_dsi_connector_init(drm, dsi);
+	if (ret)
+		goto cleanup_encoder;
+
+	ret = sprd_dsi_bridge_attach(dsi);
+	if (ret)
+		goto cleanup_connector;
+
+	return 0;
+
+cleanup_connector:
+	drm_connector_cleanup(&dsi->connector);
+cleanup_encoder:
+	drm_encoder_cleanup(&dsi->encoder);
+cleanup_host:
+	mipi_dsi_host_unregister(&dsi->host);
+	return ret;
+}
+
+static void sprd_dsi_unbind(struct device *dev,
+			struct device *master, void *data)
+{
+	/* do nothing */
+	DRM_DEBUG("%s()\n", __func__);
+
+}
+
+static const struct component_ops dsi_component_ops = {
+	.bind	= sprd_dsi_bind,
+	.unbind	= sprd_dsi_unbind,
+};
+
+static int sprd_dsi_context_init(struct sprd_dsi *dsi,
+			struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dsi_context *ctx = &dsi->ctx;
+	struct resource *res;
+	int ret;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	ctx->base = (unsigned long)devm_ioremap(dev, res->start,
+					resource_size(res));
+	if (ctx->base == 0) {
+		DRM_ERROR("failed to map dsi host registers\n");
+		return -ENXIO;
+	}
+
+	ctx->irq0 = platform_get_irq(pdev, 0);
+	if (ctx->irq0 > 0) {
+		ret = request_irq(ctx->irq0, sprd_dsi_isr, 0, "DSI_INT0", dsi);
+		if (ret) {
+			DRM_ERROR("failed to request dsi irq int0!\n");
+			return -EINVAL;
+		}
+	}
+
+	ctx->irq1 = platform_get_irq(pdev, 1);
+	if (ctx->irq1 > 0) {
+		ret = request_irq(ctx->irq1, sprd_dsi_isr, 0, "DSI_INT1", dsi);
+		if (ret) {
+			DRM_ERROR("failed to request dsi irq int1!\n");
+			return -EINVAL;
+		}
+	}
+
+	ctx->data_hs2lp = 120;
+	ctx->data_lp2hs = 500;
+	ctx->clk_hs2lp = 4;
+	ctx->clk_lp2hs = 15;
+	ctx->max_rd_time = 6000;
+	ctx->int0_mask = 0xffffffff;
+	ctx->int1_mask = 0xffffffff;
+
+	return 0;
+}
+
+static const struct of_device_id dsi_match_table[] = {
+	{ .compatible = "sprd,sharkl3-dsi-host" },
+	{ /* sentinel */ },
+};
+
+static int sprd_dsi_probe(struct platform_device *pdev)
+{
+	struct sprd_dsi *dsi;
+	int ret;
+
+	dsi = devm_kzalloc(&pdev->dev, sizeof(*dsi), GFP_KERNEL);
+	if (!dsi) {
+		DRM_ERROR("failed to allocate dsi data.\n");
+		return -ENOMEM;
+	}
+
+	ret = sprd_dsi_context_init(dsi, &pdev->dev);
+	if (ret)
+		return ret;
+
+	ret = sprd_dsi_host_init(dsi, &pdev->dev);
+	if (ret)
+		return ret;
+	
+	platform_set_drvdata(pdev, dsi);
+
+	return component_add(&pdev->dev, &dsi_component_ops);
+}
+
+static int sprd_dsi_remove(struct platform_device *pdev)
+{
+	component_del(&pdev->dev, &dsi_component_ops);
+
+	return 0;
+}
+
+struct platform_driver sprd_dsi_driver = {
+	.probe = sprd_dsi_probe,
+	.remove = sprd_dsi_remove,
+	.driver = {
+		.name = "sprd-dsi-drv",
+		.of_match_table = dsi_match_table,
+	},
+};
+
+MODULE_AUTHOR("Leon He <leon.he@unisoc.com>");
+MODULE_AUTHOR("Kevin Tang <kevin.tang@unisoc.com>");
+MODULE_DESCRIPTION("Unisoc MIPI DSI HOST Controller Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/sprd/sprd_dsi.h b/drivers/gpu/drm/sprd/sprd_dsi.h
new file mode 100644
index 0000000..ce9ff03
--- /dev/null
+++ b/drivers/gpu/drm/sprd/sprd_dsi.h
@@ -0,0 +1,105 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#ifndef __SPRD_DSI_H__
+#define __SPRD_DSI_H__
+
+#include <linux/of.h>
+#include <linux/device.h>
+#include <video/videomode.h>
+
+#include <drm/drm_bridge.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_print.h>
+#include <drm/drm_panel.h>
+
+#define DSI_INT_STS_NEED_SOFT_RESET	BIT(0)
+#define DSI_INT_STS_NEED_HARD_RESET	BIT(1)
+
+enum dsi_work_mode {
+	DSI_MODE_CMD = 0,
+	DSI_MODE_VIDEO
+};
+
+enum video_burst_mode {
+	VIDEO_NON_BURST_WITH_SYNC_PULSES = 0,
+	VIDEO_NON_BURST_WITH_SYNC_EVENTS,
+	VIDEO_BURST_WITH_SYNC_PULSES
+};
+
+enum dsi_color_coding {
+	COLOR_CODE_16BIT_CONFIG1 = 0,
+	COLOR_CODE_16BIT_CONFIG2,
+	COLOR_CODE_16BIT_CONFIG3,
+	COLOR_CODE_18BIT_CONFIG1,
+	COLOR_CODE_18BIT_CONFIG2,
+	COLOR_CODE_24BIT,
+	COLOR_CODE_20BIT_YCC422_LOOSELY,
+	COLOR_CODE_24BIT_YCC422,
+	COLOR_CODE_16BIT_YCC422,
+	COLOR_CODE_30BIT,
+	COLOR_CODE_36BIT,
+	COLOR_CODE_12BIT_YCC420,
+	COLOR_CODE_COMPRESSTION,
+	COLOR_CODE_MAX
+};
+
+struct dsi_context {
+	unsigned long base;
+	struct videomode vm;
+	bool enabled;
+
+	u8 lanes;
+	u32 format;
+	u8 work_mode;
+	u8 burst_mode;
+
+	int irq0;
+	int irq1;
+	u32 int0_mask;
+	u32 int1_mask;
+
+	/* byte clock [KHz] */
+	u32 byte_clk;
+	/* escape clock [KHz] */
+	u32 esc_clk;
+
+	/* maximum time (ns) for data lanes from HS to LP */
+	u16 data_hs2lp;
+	/* maximum time (ns) for data lanes from LP to HS */
+	u16 data_lp2hs;
+	/* maximum time (ns) for clk lanes from HS to LP */
+	u16 clk_hs2lp;
+	/* maximum time (ns) for clk lanes from LP to HS */
+	u16 clk_lp2hs;
+	/* maximum time (ns) for BTA operation - REQUIRED */
+	u16 max_rd_time;
+
+	/* is 18-bit loosely packets (valid only when BPP == 18) */
+	bool is_18_loosely;
+	/* enable receiving frame ack packets - for video mode */
+	bool frame_ack_en;
+	/* enable receiving tear effect ack packets - for cmd mode */
+	bool te_ack_en;
+	/* enable non coninuous clock for energy saving */
+	bool nc_clk_en;
+};
+
+struct sprd_dsi {
+	struct device dev;
+	struct mipi_dsi_host host;
+	struct mipi_dsi_device *slave;
+	struct drm_encoder encoder;
+	struct drm_connector connector;
+	struct drm_bridge *bridge;
+	struct drm_panel *panel;
+	struct drm_display_mode *mode;
+	struct sprd_dphy *phy;
+	struct dsi_context ctx;
+};
+
+#endif /* __SPRD_DSI_H__ */
-- 
2.7.4

[PATCH RFC v7 6/6] drm/sprd: add Unisoc's drm mipi dsi&dphy driver

[Kevin Tang]

Adds dsi host controller support for the Unisoc's display subsystem.
Adds dsi phy support for the Unisoc's display subsystem.
Only MIPI DSI Displays supported, DP/TV/HMDI will be support
in the feature.

Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Kevin Tang <kevin3.tang@gmail.com>
---
 drivers/gpu/drm/sprd/Makefile          |    9 +-
 drivers/gpu/drm/sprd/dw_dsi_ctrl.c     |  792 +++++++++++++++++
 drivers/gpu/drm/sprd/dw_dsi_ctrl.h     | 1475 ++++++++++++++++++++++++++++++++
 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c |  276 ++++++
 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h |   34 +
 drivers/gpu/drm/sprd/megacores_pll.c   |  315 +++++++
 drivers/gpu/drm/sprd/megacores_pll.h   |  146 ++++
 drivers/gpu/drm/sprd/sprd_dphy.c       |  335 ++++++++
 drivers/gpu/drm/sprd/sprd_dphy.h       |   39 +
 drivers/gpu/drm/sprd/sprd_dpu.c        |   22 +
 drivers/gpu/drm/sprd/sprd_dpu.h        |    3 +
 drivers/gpu/drm/sprd/sprd_drm.c        |   40 +
 drivers/gpu/drm/sprd/sprd_drm.h        |    2 +
 drivers/gpu/drm/sprd/sprd_dsi.c        | 1102 ++++++++++++++++++++++++
 drivers/gpu/drm/sprd/sprd_dsi.h        |  105 +++
 15 files changed, 4693 insertions(+), 2 deletions(-)
 create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl.c
 create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl.h
 create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c
 create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h
 create mode 100644 drivers/gpu/drm/sprd/megacores_pll.c
 create mode 100644 drivers/gpu/drm/sprd/megacores_pll.h
 create mode 100644 drivers/gpu/drm/sprd/sprd_dphy.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_dphy.h
 create mode 100644 drivers/gpu/drm/sprd/sprd_dsi.c
 create mode 100644 drivers/gpu/drm/sprd/sprd_dsi.h

diff --git a/drivers/gpu/drm/sprd/Makefile b/drivers/gpu/drm/sprd/Makefile
index 0ba48f2..75d6a519 100644
--- a/drivers/gpu/drm/sprd/Makefile
+++ b/drivers/gpu/drm/sprd/Makefile
@@ -1,7 +1,12 @@
 # SPDX-License-Identifier: GPL-2.0
 
 obj-y := sprd_drm.o \
-	sprd_dpu.o
+	sprd_dpu.o \
+	sprd_dsi.o \
+	sprd_dphy.o \
+	dpu_r2p0.o \
+	dw_dsi_ctrl.o \
+	dw_dsi_ctrl_ppi.o \
+	megacores_pll.o
 
-obj-y += dpu_r2p0.o
 
diff --git a/drivers/gpu/drm/sprd/dw_dsi_ctrl.c b/drivers/gpu/drm/sprd/dw_dsi_ctrl.c
new file mode 100644
index 0000000..1470d7d
--- /dev/null
+++ b/drivers/gpu/drm/sprd/dw_dsi_ctrl.c
@@ -0,0 +1,792 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+
+#include "dw_dsi_ctrl.h"
+
+/*
+ * Modify power status of DSI Host core
+ */
+void dsi_power_enable(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(enable, &reg->SOFT_RESET);
+}
+/*
+ * Enable/disable DPI video mode
+ */
+void dsi_video_mode(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(0, &reg->DSI_MODE_CFG);
+}
+/*
+ * Enable command mode (Generic interface)
+ */
+void dsi_cmd_mode(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(1, &reg->DSI_MODE_CFG);
+}
+
+bool dsi_is_cmd_mode(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	return readl(&reg->DSI_MODE_CFG);
+}
+/*
+ * Configure the read back virtual channel for the generic interface
+ */
+void dsi_rx_vcid(struct dsi_context *ctx, u8 vc)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x1C virtual_channel_id;
+
+	virtual_channel_id.val = readl(&reg->VIRTUAL_CHANNEL_ID);
+	virtual_channel_id.bits.gen_rx_vcid = vc;
+
+	writel(virtual_channel_id.val, &reg->VIRTUAL_CHANNEL_ID);
+}
+/*
+ * Write the DPI video virtual channel destination
+ */
+void dsi_video_vcid(struct dsi_context *ctx, u8 vc)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x1C virtual_channel_id;
+
+	virtual_channel_id.val = readl(&reg->VIRTUAL_CHANNEL_ID);
+	virtual_channel_id.bits.video_pkt_vcid = vc;
+
+	writel(virtual_channel_id.val, &reg->VIRTUAL_CHANNEL_ID);
+}
+/*
+ * Set DPI video mode type (burst/non-burst - with sync pulses or events)
+ */
+void dsi_dpi_video_burst_mode(struct dsi_context *ctx, int mode)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x38 vid_mode_cfg;
+
+	vid_mode_cfg.val = readl(&reg->VID_MODE_CFG);
+	vid_mode_cfg.bits.vid_mode_type = mode;
+
+	writel(vid_mode_cfg.val, &reg->VID_MODE_CFG);
+}
+/*
+ * Set DPI video color coding
+ */
+void dsi_dpi_color_coding(struct dsi_context *ctx, int coding)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x20 dpi_video_format;
+
+	dpi_video_format.val = readl(&reg->DPI_VIDEO_FORMAT);
+	dpi_video_format.bits.dpi_video_mode_format = coding;
+
+	writel(dpi_video_format.val, &reg->DPI_VIDEO_FORMAT);
+}
+/*
+ * Configure the Horizontal Line time
+ * param "byte_cycle" taken to transmit the total of the horizontal line
+ */
+void dsi_dpi_hline_time(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x2C video_line_time;
+
+	video_line_time.val = readl(&reg->VIDEO_LINE_TIME);
+	video_line_time.bits.video_line_time = byte_cycle;
+
+	writel(video_line_time.val, &reg->VIDEO_LINE_TIME);
+}
+/*
+ * Configure the Horizontal back porch time
+ * param "byte_cycle" taken to transmit the horizontal back porch
+ */
+void dsi_dpi_hbp_time(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x28 video_line_hblk_time;
+
+	video_line_hblk_time.val = readl(&reg->VIDEO_LINE_HBLK_TIME);
+	video_line_hblk_time.bits.video_line_hbp_time = byte_cycle;
+
+	writel(video_line_hblk_time.val, &reg->VIDEO_LINE_HBLK_TIME);
+}
+/*
+ * Configure the Horizontal sync time,
+ * param "byte_cycle" taken to transmit the horizontal sync
+ */
+void dsi_dpi_hsync_time(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x28 video_line_hblk_time;
+
+	video_line_hblk_time.val = readl(&reg->VIDEO_LINE_HBLK_TIME);
+	video_line_hblk_time.bits.video_line_hsa_time = byte_cycle;
+
+	writel(video_line_hblk_time.val, &reg->VIDEO_LINE_HBLK_TIME);
+}
+/*
+ * Configure the vertical active lines of the video stream
+ */
+void dsi_dpi_vact(struct dsi_context *ctx, u16 lines)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x34 video_active_lines;
+
+	video_active_lines.val = readl(&reg->VIDEO_VACTIVE_LINES);
+	video_active_lines.bits.vactive_lines = lines;
+
+	writel(video_active_lines.val, &reg->VIDEO_VACTIVE_LINES);
+}
+
+void dsi_dpi_vfp(struct dsi_context *ctx, u16 lines)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x30 video_vblk_lines;
+
+	video_vblk_lines.val = readl(&reg->VIDEO_VBLK_LINES);
+	video_vblk_lines.bits.vfp_lines = lines;
+
+	writel(video_vblk_lines.val, &reg->VIDEO_VBLK_LINES);
+}
+
+void dsi_dpi_vbp(struct dsi_context *ctx, u16 lines)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x30 video_vblk_lines;
+
+	video_vblk_lines.val = readl(&reg->VIDEO_VBLK_LINES);
+	video_vblk_lines.bits.vbp_lines = lines;
+
+	writel(video_vblk_lines.val, &reg->VIDEO_VBLK_LINES);
+}
+
+void dsi_dpi_vsync(struct dsi_context *ctx, u16 lines)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x30 video_vblk_lines;
+
+	video_vblk_lines.val = readl(&reg->VIDEO_VBLK_LINES);
+	video_vblk_lines.bits.vsa_lines = lines;
+
+	writel(video_vblk_lines.val, &reg->VIDEO_VBLK_LINES);
+}
+
+void dsi_dpi_hporch_lp_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x38 vid_mode_cfg;
+
+	vid_mode_cfg.val = readl(&reg->VID_MODE_CFG);
+
+	vid_mode_cfg.bits.lp_hfp_en = enable;
+	vid_mode_cfg.bits.lp_hbp_en = enable;
+
+	writel(vid_mode_cfg.val, &reg->VID_MODE_CFG);
+}
+/*
+ * Enable return to low power mode inside vertical active lines periods when
+ * timing allows
+ */
+void dsi_dpi_vporch_lp_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x38 vid_mode_cfg;
+
+	vid_mode_cfg.val = readl(&reg->VID_MODE_CFG);
+
+	vid_mode_cfg.bits.lp_vact_en = enable;
+	vid_mode_cfg.bits.lp_vfp_en = enable;
+	vid_mode_cfg.bits.lp_vbp_en = enable;
+	vid_mode_cfg.bits.lp_vsa_en = enable;
+
+	writel(vid_mode_cfg.val, &reg->VID_MODE_CFG);
+}
+/*
+ * Enable FRAME BTA ACK
+ */
+void dsi_dpi_frame_ack_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x38 vid_mode_cfg;
+
+	vid_mode_cfg.val = readl(&reg->VID_MODE_CFG);
+	vid_mode_cfg.bits.frame_bta_ack_en = enable;
+
+	writel(vid_mode_cfg.val, &reg->VID_MODE_CFG);
+}
+/*
+ * Write no of chunks to core - taken into consideration only when multi packet
+ * is enabled
+ */
+void dsi_dpi_chunk_num(struct dsi_context *ctx, u16 num)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x24 video_pkt_config;
+
+	video_pkt_config.val = readl(&reg->VIDEO_PKT_CONFIG);
+	video_pkt_config.bits.video_line_chunk_num = num;
+
+	writel(video_pkt_config.val, &reg->VIDEO_PKT_CONFIG);
+}
+/*
+ * Write the null packet size - will only be taken into account when null
+ * packets are enabled.
+ */
+void dsi_dpi_null_packet_size(struct dsi_context *ctx, u16 size)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xC0 video_nullpkt_size;
+
+	video_nullpkt_size.val = readl(&reg->VIDEO_NULLPKT_SIZE);
+	video_nullpkt_size.bits.video_nullpkt_size = size;
+
+	writel(video_nullpkt_size.val, &reg->VIDEO_NULLPKT_SIZE);
+}
+/*
+ * Write video packet size. obligatory for sending video
+ */
+void dsi_dpi_video_packet_size(struct dsi_context *ctx, u16 size)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x24 video_pkt_config;
+
+	video_pkt_config.val = readl(&reg->VIDEO_PKT_CONFIG);
+	video_pkt_config.bits.video_pkt_size = size;
+
+	writel(video_pkt_config.val, &reg->VIDEO_PKT_CONFIG);
+}
+/*
+ * Specifiy the size of the packet memory write start/continue
+ */
+void dsi_edpi_max_pkt_size(struct dsi_context *ctx, u16 size)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xC4 dcs_wm_pkt_size;
+
+	dcs_wm_pkt_size.val = readl(&reg->DCS_WM_PKT_SIZE);
+	dcs_wm_pkt_size.bits.dcs_wm_pkt_size = size;
+
+	writel(dcs_wm_pkt_size.val, &reg->DCS_WM_PKT_SIZE);
+}
+/*
+ * Enable tear effect acknowledge
+ */
+void dsi_tear_effect_ack_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x68 cmd_mode_cfg;
+
+	cmd_mode_cfg.val = readl(&reg->CMD_MODE_CFG);
+	cmd_mode_cfg.bits.tear_fx_en = enable;
+
+	writel(cmd_mode_cfg.val, &reg->CMD_MODE_CFG);
+}
+/*
+ * Set DCS command packet transmission to transmission type
+ */
+void dsi_cmd_mode_lp_cmd_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x68 cmd_mode_cfg;
+
+	cmd_mode_cfg.val = readl(&reg->CMD_MODE_CFG);
+
+	cmd_mode_cfg.bits.gen_sw_0p_tx = enable;
+	cmd_mode_cfg.bits.gen_sw_1p_tx = enable;
+	cmd_mode_cfg.bits.gen_sw_2p_tx = enable;
+	cmd_mode_cfg.bits.gen_lw_tx = enable;
+	cmd_mode_cfg.bits.dcs_sw_0p_tx = enable;
+	cmd_mode_cfg.bits.dcs_sw_1p_tx = enable;
+	cmd_mode_cfg.bits.dcs_lw_tx = enable;
+	cmd_mode_cfg.bits.max_rd_pkt_size = enable;
+
+	cmd_mode_cfg.bits.gen_sr_0p_tx = enable;
+	cmd_mode_cfg.bits.gen_sr_1p_tx = enable;
+	cmd_mode_cfg.bits.gen_sr_2p_tx = enable;
+	cmd_mode_cfg.bits.dcs_sr_0p_tx = enable;
+
+	writel(cmd_mode_cfg.val, &reg->CMD_MODE_CFG);
+}
+/*
+ * Set DCS read command packet transmission to transmission type
+ */
+void dsi_video_mode_lp_cmd_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x38 vid_mode_cfg;
+
+	vid_mode_cfg.val = readl(&reg->VID_MODE_CFG);
+	vid_mode_cfg.bits.lp_cmd_en = enable;
+
+	writel(vid_mode_cfg.val, &reg->VID_MODE_CFG);
+}
+
+/*
+ * Write command header in the generic interface (which also sends DCS commands) as a subset
+ */
+void dsi_set_packet_header(struct dsi_context *ctx,
+				   u8 vc,
+				   u8 type,
+				   u8 wc_lsb,
+				   u8 wc_msb)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x6C gen_hdr;
+
+	gen_hdr.bits.gen_dt = type;
+	gen_hdr.bits.gen_vc = vc;
+	gen_hdr.bits.gen_wc_lsbyte = wc_lsb;
+	gen_hdr.bits.gen_wc_msbyte = wc_msb;
+
+	writel(gen_hdr.val, &reg->GEN_HDR);
+}
+/*
+ * Write the payload of the long packet commands
+ */
+void dsi_set_packet_payload(struct dsi_context *ctx, u32 payload)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(payload, &reg->GEN_PLD_DATA);
+}
+/*
+ * Read the payload of the long packet commands
+ */
+u32 dsi_get_rx_payload(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	return readl(&reg->GEN_PLD_DATA);
+}
+
+/*
+ * Enable Bus Turn-around request
+ */
+void dsi_bta_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(enable, &reg->TA_EN);
+}
+/*
+ * Enable EOTp reception
+ */
+void dsi_eotp_rx_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xBC eotp_en;
+
+	eotp_en.val = readl(&reg->EOTP_EN);
+	eotp_en.bits.rx_eotp_en = enable;
+
+	writel(eotp_en.val, &reg->EOTP_EN);
+}
+/*
+ * Enable EOTp transmission
+ */
+void dsi_eotp_tx_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xBC eotp_en;
+
+	eotp_en.val = readl(&reg->EOTP_EN);
+	eotp_en.bits.tx_eotp_en = enable;
+
+	writel(eotp_en.val, &reg->EOTP_EN);
+}
+/*
+ * Enable ECC reception, error correction and reporting
+ */
+void dsi_ecc_rx_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xB4 rx_pkt_check_config;
+
+	rx_pkt_check_config.val = readl(&reg->RX_PKT_CHECK_CONFIG);
+	rx_pkt_check_config.bits.rx_pkt_ecc_en = enable;
+
+	writel(rx_pkt_check_config.val, &reg->RX_PKT_CHECK_CONFIG);
+}
+/*
+ * Enable CRC reception, error reporting
+ */
+void dsi_crc_rx_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xB4 rx_pkt_check_config;
+
+	rx_pkt_check_config.val = readl(&reg->RX_PKT_CHECK_CONFIG);
+	rx_pkt_check_config.bits.rx_pkt_crc_en = enable;
+
+	writel(rx_pkt_check_config.val, &reg->RX_PKT_CHECK_CONFIG);
+}
+/*
+ * Get status of read command
+ */
+bool dsi_is_bta_returned(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x98 cmd_mode_status;
+
+	cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS);
+
+	return cmd_mode_status.bits.gen_cmd_rdcmd_done;
+}
+/*
+ * Get the FULL status of generic read payload fifo
+ */
+bool dsi_is_rx_payload_fifo_full(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x98 cmd_mode_status;
+
+	cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS);
+
+	return cmd_mode_status.bits.gen_cmd_rdata_fifo_full;
+}
+/*
+ * Get the EMPTY status of generic read payload fifo
+ */
+bool dsi_is_rx_payload_fifo_empty(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x98 cmd_mode_status;
+
+	cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS);
+
+	return cmd_mode_status.bits.gen_cmd_rdata_fifo_empty;
+}
+/*
+ * Get the FULL status of generic write payload fifo
+ */
+bool dsi_is_tx_payload_fifo_full(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x98 cmd_mode_status;
+
+	cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS);
+
+	return cmd_mode_status.bits.gen_cmd_wdata_fifo_full;
+}
+/*
+ * Get the EMPTY status of generic write payload fifo
+ */
+bool dsi_is_tx_payload_fifo_empty(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x98 cmd_mode_status;
+
+	cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS);
+
+	return cmd_mode_status.bits.gen_cmd_wdata_fifo_empty;
+}
+/*
+ * Get the EMPTY status of generic command fifo
+ */
+bool dsi_is_tx_cmd_fifo_empty(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x98 cmd_mode_status;
+
+	cmd_mode_status.val = readl(&reg->CMD_MODE_STATUS);
+
+	return cmd_mode_status.bits.gen_cmd_cmd_fifo_empty;
+}
+/*
+ * DPI interface signal delay config
+ * param byte_cycle period for waiting after controller receiving HSYNC from
+ * DPI interface to start read pixel data from memory.
+ */
+void dsi_dpi_sig_delay(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xD0 video_sig_delay_config;
+
+	video_sig_delay_config.val = readl(&reg->VIDEO_SIG_DELAY_CONFIG);
+	video_sig_delay_config.bits.video_sig_delay = byte_cycle;
+
+	writel(video_sig_delay_config.val, &reg->VIDEO_SIG_DELAY_CONFIG);
+}
+/*
+ * Configure how many cycles of byte clock would the PHY module take
+ * to switch data lane from high speed to low power
+ */
+void dsi_datalane_hs2lp_config(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xAC phy_datalane_time_config;
+
+	phy_datalane_time_config.val = readl(&reg->PHY_DATALANE_TIME_CONFIG);
+	phy_datalane_time_config.bits.phy_datalane_hs_to_lp_time = byte_cycle;
+
+	writel(phy_datalane_time_config.val, &reg->PHY_DATALANE_TIME_CONFIG);
+}
+/*
+ * Configure how many cycles of byte clock would the PHY module take
+ * to switch the data lane from to low power high speed
+ */
+void dsi_datalane_lp2hs_config(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xAC phy_datalane_time_config;
+
+	phy_datalane_time_config.val = readl(&reg->PHY_DATALANE_TIME_CONFIG);
+	phy_datalane_time_config.bits.phy_datalane_lp_to_hs_time = byte_cycle;
+
+	writel(phy_datalane_time_config.val, &reg->PHY_DATALANE_TIME_CONFIG);
+}
+/*
+ * Configure how many cycles of byte clock would the PHY module take
+ * to switch clock lane from high speed to low power
+ */
+void dsi_clklane_hs2lp_config(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xA8 phy_clklane_time_config;
+
+	phy_clklane_time_config.val = readl(&reg->PHY_CLKLANE_TIME_CONFIG);
+	phy_clklane_time_config.bits.phy_clklane_hs_to_lp_time = byte_cycle;
+
+	writel(phy_clklane_time_config.val, &reg->PHY_CLKLANE_TIME_CONFIG);
+}
+/*
+ * Configure how many cycles of byte clock would the PHY module take
+ * to switch clock lane from to low power high speed
+ */
+void dsi_clklane_lp2hs_config(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0xA8 phy_clklane_time_config;
+
+	phy_clklane_time_config.val = readl(&reg->PHY_CLKLANE_TIME_CONFIG);
+	phy_clklane_time_config.bits.phy_clklane_lp_to_hs_time = byte_cycle;
+
+	writel(phy_clklane_time_config.val, &reg->PHY_CLKLANE_TIME_CONFIG);
+}
+/*
+ * Configure how many cycles of byte clock would the PHY module take
+ * to turn the bus around to start receiving
+ */
+void dsi_max_read_time(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(byte_cycle, &reg->MAX_READ_TIME);
+}
+/*
+ * Enable the automatic mechanism to stop providing clock in the clock
+ * lane when time allows
+ */
+void dsi_nc_clk_en(struct dsi_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x74 phy_clk_lane_lp_ctrl;
+
+	phy_clk_lane_lp_ctrl.val = readl(&reg->PHY_CLK_LANE_LP_CTRL);
+	phy_clk_lane_lp_ctrl.bits.auto_clklane_ctrl_en = enable;
+
+	writel(phy_clk_lane_lp_ctrl.val, &reg->PHY_CLK_LANE_LP_CTRL);
+}
+/*
+ * Write transmission escape timeout
+ * a safe guard so that the state machine would reset if transmission
+ * takes too long
+ */
+void dsi_tx_escape_division(struct dsi_context *ctx, u8 div)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(div, &reg->TX_ESC_CLK_CONFIG);
+}
+/* 
+ * Configure timeout divisions (so they would have more clock ticks)
+ * div no of hs cycles before transiting back to LP in
+ *  (lane_clk / div)
+ */
+void dsi_timeout_clock_division(struct dsi_context *ctx, u8 div)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(div, &reg->TIMEOUT_CNT_CLK_CONFIG);
+}
+/*
+ * Configure the Low power receive time out
+ */
+void dsi_lp_rx_timeout(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(byte_cycle, &reg->LRX_H_TO_CONFIG);
+}
+/*
+ * Configure a high speed transmission time out
+ */
+void dsi_hs_tx_timeout(struct dsi_context *ctx, u16 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(byte_cycle, &reg->HTX_TO_CONFIG);
+}
+/*
+ * Get the error 0 interrupt register status
+ */
+u32 dsi_int0_status(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x08 protocol_int_sts;
+
+	protocol_int_sts.val = readl(&reg->PROTOCOL_INT_STS);
+	writel(protocol_int_sts.val, &reg->PROTOCOL_INT_CLR);
+
+	if (protocol_int_sts.bits.dphy_errors_0)
+		DRM_ERROR("dphy_err: escape entry error\n");
+
+	if (protocol_int_sts.bits.dphy_errors_1)
+		DRM_ERROR("dphy_err: lp data transmission sync error\n");
+
+	if (protocol_int_sts.bits.dphy_errors_2)
+		DRM_ERROR("dphy_err: control error\n");
+
+	if (protocol_int_sts.bits.dphy_errors_3)
+		DRM_ERROR("dphy_err: LP0 contention error\n");
+
+	if (protocol_int_sts.bits.dphy_errors_4)
+		DRM_ERROR("dphy_err: LP1 contention error\n");
+
+	if (protocol_int_sts.bits.ack_with_err_0)
+		DRM_ERROR("ack_err: SoT error\n");
+
+	if (protocol_int_sts.bits.ack_with_err_1)
+		DRM_ERROR("ack_err: SoT Sync error\n");
+
+	if (protocol_int_sts.bits.ack_with_err_2)
+		DRM_ERROR("ack_err: EoT Sync error\n");
+
+	if (protocol_int_sts.bits.ack_with_err_3)
+		DRM_ERROR("ack_err: Escape Mode Entry Command error\n");
+
+	if (protocol_int_sts.bits.ack_with_err_4)
+		DRM_ERROR("ack_err: LP Transmit Sync error\n");
+
+	if (protocol_int_sts.bits.ack_with_err_5)
+		DRM_ERROR("ack_err: Peripheral Timeout error\n");
+
+	if (protocol_int_sts.bits.ack_with_err_6)
+		DRM_ERROR("ack_err: False Control error\n");
+
+	if (protocol_int_sts.bits.ack_with_err_7)
+		DRM_ERROR("ack_err: reserved (specific to device)\n");
+
+	if (protocol_int_sts.bits.ack_with_err_8)
+		DRM_ERROR("ack_err: ECC error, single-bit (corrected)\n");
+
+	if (protocol_int_sts.bits.ack_with_err_9)
+		DRM_ERROR("ack_err: ECC error, multi-bit (not corrected)\n");
+
+	if (protocol_int_sts.bits.ack_with_err_10)
+		DRM_ERROR("ack_err: checksum error (long packet only)\n");
+
+	if (protocol_int_sts.bits.ack_with_err_11)
+		DRM_ERROR("ack_err: not recognized DSI data type\n");
+
+	if (protocol_int_sts.bits.ack_with_err_12)
+		DRM_ERROR("ack_err: DSI VC ID Invalid\n");
+
+	if (protocol_int_sts.bits.ack_with_err_13)
+		DRM_ERROR("ack_err: invalid transmission length\n");
+
+	if (protocol_int_sts.bits.ack_with_err_14)
+		DRM_ERROR("ack_err: reserved (specific to device)\n");
+
+	if (protocol_int_sts.bits.ack_with_err_15)
+		DRM_ERROR("ack_err: DSI protocol violation\n");
+
+	return 0;
+}
+/*
+ * Get the error 1 interrupt register status
+ */
+u32 dsi_int1_status(struct dsi_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+	union _0x10 internal_int_sts;
+	u32 status = 0;
+
+	internal_int_sts.val = readl(&reg->INTERNAL_INT_STS);
+	writel(internal_int_sts.val, &reg->INTERNAL_INT_CLR);
+
+	if (internal_int_sts.bits.receive_pkt_size_err)
+		DRM_ERROR("receive packet size error\n");
+
+	if (internal_int_sts.bits.eotp_not_receive_err)
+		DRM_ERROR("EoTp packet is not received\n");
+
+	if (internal_int_sts.bits.gen_cmd_cmd_fifo_wr_err)
+		DRM_ERROR("cmd header-fifo is full\n");
+
+	if (internal_int_sts.bits.gen_cmd_rdata_fifo_rd_err)
+		DRM_ERROR("cmd read-payload-fifo is empty\n");
+
+	if (internal_int_sts.bits.gen_cmd_rdata_fifo_wr_err)
+		DRM_ERROR("cmd read-payload-fifo is full\n");
+
+	if (internal_int_sts.bits.gen_cmd_wdata_fifo_wr_err)
+		DRM_ERROR("cmd write-payload-fifo is full\n");
+
+	if (internal_int_sts.bits.gen_cmd_wdata_fifo_rd_err)
+		DRM_ERROR("cmd write-payload-fifo is empty\n");
+
+	if (internal_int_sts.bits.dpi_pix_fifo_wr_err) {
+		DRM_ERROR("DPI pixel-fifo is full\n");
+		status |= DSI_INT_STS_NEED_SOFT_RESET;
+	}
+
+	if (internal_int_sts.bits.ecc_single_err)
+		DRM_ERROR("ECC single error in a received packet\n");
+
+	if (internal_int_sts.bits.ecc_multi_err)
+		DRM_ERROR("ECC multiple error in a received packet\n");
+
+	if (internal_int_sts.bits.crc_err)
+		DRM_ERROR("CRC error in the received packet payload\n");
+
+	if (internal_int_sts.bits.hs_tx_timeout)
+		DRM_ERROR("high-speed transmission timeout\n");
+
+	if (internal_int_sts.bits.lp_rx_timeout)
+		DRM_ERROR("low-power reception timeout\n");
+
+	return status;
+}
+/*
+ * Configure MASK (hiding) of interrupts coming from error 0 source
+ */
+void dsi_int0_mask(struct dsi_context *ctx, u32 mask)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(mask, &reg->MASK_PROTOCOL_INT);
+}
+/*
+ * Configure MASK (hiding) of interrupts coming from error 1 source
+ */
+void dsi_int1_mask(struct dsi_context *ctx, u32 mask)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->base;
+
+	writel(mask, &reg->MASK_INTERNAL_INT);
+}
diff --git a/drivers/gpu/drm/sprd/dw_dsi_ctrl.h b/drivers/gpu/drm/sprd/dw_dsi_ctrl.h
new file mode 100644
index 0000000..ffba621
--- /dev/null
+++ b/drivers/gpu/drm/sprd/dw_dsi_ctrl.h
@@ -0,0 +1,1475 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#ifndef _DW_DSI_CTRL_H_
+#define _DW_DSI_CTRL_H_
+
+#include <asm/types.h>
+
+#include "sprd_dsi.h"
+
+struct dsi_reg {
+	union _0x00 {
+		u32 val;
+		struct _DSI_VERSION {
+		u32 dsi_version: 16;
+		u32 reserved: 16;
+		} bits;
+	} DSI_VERSION;
+
+	union _0x04 {
+		u32 val;
+		struct _SOFT_RESET {
+		/*
+		 * This bit configures the core either to work normal or to
+		 * reset. It's default value is 0. After the core configur-
+		 * ation, to enable the mipi_dsi_host, set this register to 1.
+		 * 1: power up     0: reset core
+		 */
+		u32 dsi_soft_reset: 1;
+
+		u32 reserved: 31;
+		} bits;
+	} SOFT_RESET;
+
+	union _0x08 {
+		u32 val;
+		struct _PROTOCOL_INT_STS {
+		/* ErrEsc escape entry error from Lane 0 */
+		u32 dphy_errors_0: 1;
+
+		/* ErrSyncEsc low-power data transmission synchronization
+		 * error from Lane 0
+		 */
+		u32 dphy_errors_1: 1;
+
+		/* ErrControl error from Lane 0 */
+		u32 dphy_errors_2: 1;
+
+		/* ErrContentionLP0 LP0 contention error from Lane 0 */
+		u32 dphy_errors_3: 1;
+
+		/* ErrContentionLP1 LP1 contention error from Lane 0 */
+		u32 dphy_errors_4: 1;
+
+		/* debug mode protocol errors */
+		u32 protocol_debug_err: 11;
+
+		/* SoT error from the Acknowledge error report */
+		u32 ack_with_err_0: 1;
+
+		/* SoT Sync error from the Acknowledge error report */
+		u32 ack_with_err_1: 1;
+
+		/* EoT Sync error from the Acknowledge error report */
+		u32 ack_with_err_2: 1;
+
+		/* Escape Mode Entry Command error from the Acknowledge
+		 * error report
+		 */
+		u32 ack_with_err_3: 1;
+
+		/* LP Transmit Sync error from the Acknowledge error report */
+		u32 ack_with_err_4: 1;
+
+		/* Peripheral Timeout error from the Acknowledge error report */
+		u32 ack_with_err_5: 1;
+
+		/* False Control error from the Acknowledge error report */
+		u32 ack_with_err_6: 1;
+
+		/* reserved (specific to device) from the Acknowledge error
+		 * report
+		 */
+		u32 ack_with_err_7: 1;
+
+		/* ECC error, single-bit (detected and corrected) from the
+		 * Acknowledge error report
+		 */
+		u32 ack_with_err_8: 1;
+
+		/* ECC error, multi-bit (detected, not corrected) from the
+		 * Acknowledge error report
+		 */
+		u32 ack_with_err_9: 1;
+
+		/* checksum error (long packet only) from the Acknowledge
+		 * error report
+		 */
+		u32 ack_with_err_10: 1;
+
+		/* not recognized DSI data type from the Acknowledge error
+		 * report
+		 */
+		u32 ack_with_err_11: 1;
+
+		/* DSI VC ID Invalid from the Acknowledge error report */
+		u32 ack_with_err_12: 1;
+
+		/* invalid transmission length from the Acknowledge error
+		 * report
+		 */
+		u32 ack_with_err_13: 1;
+
+		/* reserved (specific to device) from the Acknowledge error
+		 * report
+		 */
+		u32 ack_with_err_14: 1;
+
+		/* DSI protocol violation from the Acknowledge error report */
+		u32 ack_with_err_15: 1;
+
+		} bits;
+	} PROTOCOL_INT_STS;
+
+	union _0x0C {
+		u32 val;
+		struct _MASK_PROTOCOL_INT {
+		u32 mask_dphy_errors_0: 1;
+		u32 mask_dphy_errors_1: 1;
+		u32 mask_dphy_errors_2: 1;
+		u32 mask_dphy_errors_3: 1;
+		u32 mask_dphy_errors_4: 1;
+		u32 mask_protocol_debug_err: 11;
+		u32 mask_ack_with_err_0: 1;
+		u32 mask_ack_with_err_1: 1;
+		u32 mask_ack_with_err_2: 1;
+		u32 mask_ack_with_err_3: 1;
+		u32 mask_ack_with_err_4: 1;
+		u32 mask_ack_with_err_5: 1;
+		u32 mask_ack_with_err_6: 1;
+		u32 mask_ack_with_err_7: 1;
+		u32 mask_ack_with_err_8: 1;
+		u32 mask_ack_with_err_9: 1;
+		u32 mask_ack_with_err_10: 1;
+		u32 mask_ack_with_err_11: 1;
+		u32 mask_ack_with_err_12: 1;
+		u32 mask_ack_with_err_13: 1;
+		u32 mask_ack_with_err_14: 1;
+		u32 mask_ack_with_err_15: 1;
+		} bits;
+	} MASK_PROTOCOL_INT;
+
+	union _0x10 {
+		u32 val;
+		struct _INTERNAL_INT_STS {
+		/* This bit indicates that the packet size error is detected
+		 * during the packet reception.
+		 */
+		u32 receive_pkt_size_err: 1;
+
+		/* This bit indicates that the EoTp packet is not received at
+		 * the end of the incoming peripheral transmission
+		 */
+		u32 eotp_not_receive_err: 1;
+
+		/* This bit indicates that the system tried to write a command
+		 * through the Generic interface and the FIFO is full. There-
+		 * fore, the command is not written.
+		 */
+		u32 gen_cmd_cmd_fifo_wr_err: 1;
+
+		/* This bit indicates that during a DCS read data, the payload
+		 * FIFO becomes	empty and the data sent to the interface is
+		 * corrupted.
+		 */
+		u32 gen_cmd_rdata_fifo_rd_err: 1;
+
+		/* This bit indicates that during a generic interface packet
+		 * read back, the payload FIFO becomes full and the received
+		 * data is corrupted.
+		 */
+		u32 gen_cmd_rdata_fifo_wr_err: 1;
+
+		/* This bit indicates that the system tried to write a payload
+		 * data through the Generic interface and the FIFO is full.
+		 * Therefore, the payload is not written.
+		 */
+		u32 gen_cmd_wdata_fifo_wr_err: 1;
+
+		/* This bit indicates that during a Generic interface packet
+		 * build, the payload FIFO becomes empty and corrupt data is
+		 * sent.
+		 */
+		u32 gen_cmd_wdata_fifo_rd_err: 1;
+
+		/* This bit indicates that during a DPI pixel line storage,
+		 * the payload FIFO becomes full and the data stored is
+		 * corrupted.
+		 */
+		u32 dpi_pix_fifo_wr_err: 1;
+
+		/* internal debug error	*/
+		u32 internal_debug_err: 19;
+
+		/* This bit indicates that the ECC single error is detected
+		 * and corrected in a received packet.
+		 */
+		u32 ecc_single_err: 1;
+
+		/* This bit indicates that the ECC multiple error is detected
+		 * in a received packet.
+		 */
+		u32 ecc_multi_err: 1;
+
+		/* This bit indicates that the CRC error is detected in the
+		 * received packet payload.
+		 */
+		u32 crc_err: 1;
+
+		/* This bit indicates that the high-speed transmission timeout
+		 * counter reached the end and contention is detected.
+		 */
+		u32 hs_tx_timeout: 1;
+
+		/* This bit indicates that the low-power reception timeout
+		 * counter reached the end and contention is detected.
+		 */
+		u32 lp_rx_timeout: 1;
+
+		} bits;
+	} INTERNAL_INT_STS;
+
+	union _0x14 {
+		u32 val;
+		struct _MASK_INTERNAL_INT {
+		u32 mask_receive_pkt_size_err: 1;
+		u32 mask_eopt_not_receive_err: 1;
+		u32 mask_gen_cmd_cmd_fifo_wr_err: 1;
+		u32 mask_gen_cmd_rdata_fifo_rd_err: 1;
+		u32 mask_gen_cmd_rdata_fifo_wr_err: 1;
+		u32 mask_gen_cmd_wdata_fifo_wr_err: 1;
+		u32 mask_gen_cmd_wdata_fifo_rd_err: 1;
+		u32 mask_dpi_pix_fifo_wr_err: 1;
+		u32 mask_internal_debug_err: 19;
+		u32 mask_ecc_single_err: 1;
+		u32 mask_ecc_multi_err: 1;
+		u32 mask_crc_err: 1;
+		u32 mask_hs_tx_timeout: 1;
+		u32 mask_lp_rx_timeout: 1;
+		} bits;
+	} MASK_INTERNAL_INT;
+
+	union _0x18 {
+		u32 val;
+		struct _DSI_MODE_CFG {
+		/* This bit configures the operation mode
+		 * 0: Video mode ;   1: Command mode
+		 */
+		u32 cmd_video_mode: 1;
+
+		u32 reserved: 31;
+
+		} bits;
+	} DSI_MODE_CFG;
+
+	union _0x1C {
+		u32 val;
+		struct _VIRTUAL_CHANNEL_ID {
+		/* This field indicates the Generic interface read-back
+		 * virtual channel identification
+		 */
+		u32 gen_rx_vcid: 2;
+
+		/* This field configures the DPI virtual channel id that
+		 * is indexed to the VIDEO mode packets
+		 */
+		u32 video_pkt_vcid: 2;
+
+		u32 reserved: 28;
+
+		} bits;
+	} VIRTUAL_CHANNEL_ID;
+
+	union _0x20 {
+		u32 val;
+		struct _DPI_VIDEO_FORMAT {
+		/*
+		 * This field configures the DPI color coding as follows:
+		 * 0000: 16-bit configuration 1
+		 * 0001: 16-bit configuration 2
+		 * 0010: 16-bit configuration 3
+		 * 0011: 18-bit configuration 1
+		 * 0100: 18-bit configuration 2
+		 * 0101: 24-bit
+		 * 0110: 20-bit YCbCr 4:2:2 loosely packed
+		 * 0111: 24-bit YCbCr 4:2:2
+		 * 1000: 16-bit YCbCr 4:2:2
+		 * 1001: 30-bit
+		 * 1010: 36-bit
+		 * 1011: 12-bit YCbCr 4:2:0
+		 * 1100: Compression Display Stream
+		 * 1101-1111: 12-bit YCbCr 4:2:0
+		 */
+		u32 dpi_video_mode_format: 6;
+
+		/* When set to 1, this bit activates loosely packed
+		 * variant to 18-bit configurations
+		 */
+		u32 loosely18_en: 1;
+
+		u32 reserved: 25;
+
+		} bits;
+	} DPI_VIDEO_FORMAT;
+
+	union _0x24 {
+		u32 val;
+		struct _VIDEO_PKT_CONFIG {
+		/*
+		 * This field configures the number of pixels in a single
+		 * video packet. For 18-bit not loosely packed data types,
+		 * this number must be a multiple of 4. For YCbCr data
+		 * types, it must be a multiple of 2, as described in the
+		 * DSI specification.
+		 */
+		u32 video_pkt_size: 16;
+
+		/*
+		 * This register configures the number of chunks to be
+		 * transmitted during a Line period (a chunk consists of
+		 * a video packet and a null packet). If set to 0 or 1,
+		 * the video line is transmitted in a single packet. If
+		 * set to 1, the packet is part of a chunk, so a null packet
+		 * follows it if vid_null_size > 0. Otherwise, multiple chunks
+		 * are used to transmit each video line.
+		 */
+		u32 video_line_chunk_num: 16;
+
+		} bits;
+	} VIDEO_PKT_CONFIG;
+
+	union _0x28 {
+		u32 val;
+		struct _VIDEO_LINE_HBLK_TIME {
+		/* This field configures the Horizontal Back Porch period
+		 * in lane byte clock cycles
+		 */
+		u32 video_line_hbp_time: 16;
+
+		/* This field configures the Horizontal Synchronism Active
+		 * period in lane byte clock cycles
+		 */
+		u32 video_line_hsa_time: 16;
+
+		} bits;
+	} VIDEO_LINE_HBLK_TIME;
+
+	union _0x2C {
+		u32 val;
+		struct _VIDEO_LINE_TIME {
+		/* This field configures the size of the total line time
+		 * (HSA+HBP+HACT+HFP) counted in lane byte clock cycles
+		 */
+		u32 video_line_time: 16;
+
+		u32 reserved: 16;
+
+		} bits;
+	} VIDEO_LINE_TIME;
+
+	union _0x30 {
+		u32 val;
+		struct _VIDEO_VBLK_LINES {
+		/* This field configures the Vertical Front Porch period
+		 * measured in number of horizontal lines
+		 */
+		u32 vfp_lines: 10;
+
+		/* This field configures the Vertical Back Porch period
+		 * measured in number of horizontal lines
+		 */
+		u32 vbp_lines: 10;
+
+		/* This field configures the Vertical Synchronism Active
+		 * period measured in number of horizontal lines
+		 */
+		u32 vsa_lines: 10;
+
+		u32 reserved: 2;
+
+		} bits;
+	} VIDEO_VBLK_LINES;
+
+	union _0x34 {
+		u32 val;
+		struct _VIDEO_VACTIVE_LINES {
+		/* This field configures the Vertical Active period measured
+		 * in number of horizontal lines
+		 */
+		u32 vactive_lines: 14;
+
+		u32 reserved: 18;
+
+		} bits;
+	} VIDEO_VACTIVE_LINES;
+
+	union _0x38 {
+		u32 val;
+		struct _VID_MODE_CFG {
+		/*
+		 * This field indicates the video mode transmission type as
+		 * follows:
+		 * 00: Non-burst with sync pulses
+		 * 01: Non-burst with sync events
+		 * 10 and 11: Burst mode
+		 */
+		u32 vid_mode_type: 2;
+
+		u32 reserved_0: 6;
+
+		/* When set to 1, this bit enables the return to low-power
+		 * inside the VSA period when timing allows.
+		 */
+		u32 lp_vsa_en: 1;
+
+		/* When set to 1, this bit enables the return to low-power
+		 * inside the VBP period when timing allows.
+		 */
+		u32 lp_vbp_en: 1;
+
+		/* When set to 1, this bit enables the return to low-power
+		 * inside the VFP period when timing allows.
+		 */
+		u32 lp_vfp_en: 1;
+
+		/* When set to 1, this bit enables the return to low-power
+		 * inside the VACT period when timing allows.
+		 */
+		u32 lp_vact_en: 1;
+
+		/* When set to 1, this bit enables the return to low-power
+		 * inside the HBP period when timing allows.
+		 */
+		u32 lp_hbp_en: 1;
+
+		/* When set to 1, this bit enables the return to low-power
+		 * inside the HFP period when timing allows.
+		 */
+		u32 lp_hfp_en: 1;
+
+		/* When set to 1, this bit enables the request for an ack-
+		 * nowledge response at the end of a frame.
+		 */
+		u32 frame_bta_ack_en: 1;
+
+		/* When set to 1, this bit enables the command transmission
+		 * only in low-power mode.
+		 */
+		u32 lp_cmd_en: 1;
+
+		u32 reserved_1: 16;
+
+		} bits;
+	} VID_MODE_CFG;
+
+	union _0x3C {
+		u32 val;
+		struct _SDF_MODE_CONFIG {
+		/*
+		 * This field defines the 3D mode on/off & display orientation:
+		 * 00: 3D mode off (2D mode on)
+		 * 01: 3D mode on, portrait orientation
+		 * 10: 3D mode on, landscape orientation
+		 * 11: Reserved
+		 */
+		u32 rf_3d_mode: 2;
+
+		/*
+		 * This field defines the 3D image format:
+		 * 00: Line (alternating lines of left and right data)
+		 * 01: Frame (alternating frames of left and right data)
+		 * 10: Pixel (alternating pixels of left and right data)
+		 * 11: Reserved
+		 */
+		u32 rf_3d_format: 2;
+
+		/*
+		 * This field defines whether there is a second VSYNC pulse
+		 * between Left and Right Images, when 3D Image Format is
+		 * Frame-based:
+		 * 0: No sync pulses between left and right data
+		 * 1: Sync pulse (HSYNC, VSYNC, blanking) between left and
+		 *    right data
+		 */
+		u32 second_vsync_en: 1;
+
+		/*
+		 * This bit defines the left or right order:
+		 * 0: Left eye data is sent first, and then the right eye data
+		 *    is sent.
+		 * 1: Right eye data is sent first, and then the left eye data
+		 *    is sent.
+		 */
+		u32 left_right_order: 1;
+
+		u32 reserved_0: 2;
+
+		/*
+		 * When set, causes the next VSS packet to include 3D control
+		 * payload in every VSS packet.
+		 */
+		u32 rf_3d_payload_en: 1;
+
+		u32 reserved_1: 23;
+
+		} bits;
+	} SDF_MODE_CONFIG;
+
+	union _0x40 {
+		u32 val;
+		struct _TIMEOUT_CNT_CLK_CONFIG {
+		/*
+		 * This field indicates the division factor for the Time Out
+		 * clock used as the timing unit in the configuration of HS to
+		 * LP and LP to HS transition error.
+		 */
+		u32 timeout_cnt_clk_config: 16;
+
+		u32 reserved: 16;
+
+		} bits;
+	} TIMEOUT_CNT_CLK_CONFIG;
+
+	union _0x44 {
+		u32 val;
+		struct _HTX_TO_CONFIG {
+		/*
+		 * This field configures the timeout counter that triggers
+		 * a high speed transmission timeout contention detection
+		 * (measured in TO_CLK_DIVISION cycles).
+		 *
+		 * If using the non-burst mode and there is no sufficient
+		 * time to switch from HS to LP and back in the period which
+		 * is from one line data finishing to the next line sync
+		 * start, the DSI link returns the LP state once per frame,
+		 * then you should configure the TO_CLK_DIVISION and
+		 * hstx_to_cnt to be in accordance with:
+		 * hstx_to_cnt * lanebyteclkperiod * TO_CLK_DIVISION >= the
+		 * time of one FRAME data transmission * (1 + 10%)
+		 *
+		 * In burst mode, RGB pixel packets are time-compressed,
+		 * leaving more time during a scan line. Therefore, if in
+		 * burst mode and there is sufficient time to switch from HS
+		 * to LP and back in the period of time from one line data
+		 * finishing to the next line sync start, the DSI link can
+		 * return LP mode and back in this time interval to save power.
+		 * For this, configure the TO_CLK_DIVISION and hstx_to_cnt
+		 * to be in accordance with:
+		 * hstx_to_cnt * lanebyteclkperiod * TO_CLK_DIVISION >= the
+		 * time of one LINE data transmission * (1 + 10%)
+		 */
+		u32 htx_to_cnt_limit: 32;
+		} bits;
+	} HTX_TO_CONFIG;
+
+	union _0x48 {
+		u32 val;
+		struct _LRX_H_TO_CONFIG {
+		/*
+		 * This field configures the timeout counter that triggers
+		 * a low-power reception timeout contention detection (measured
+		 * in TO_CLK_DIVISION cycles).
+		 */
+		u32 lrx_h_to_cnt_limit: 32;
+		} bits;
+	} LRX_H_TO_CONFIG;
+
+	union _0x4C {
+		u32 val;
+		struct _RD_PRESP_TO_CONFIG {
+		/*
+		 * This field sets a period for which the DWC_mipi_dsi_host
+		 * keeps the link still, after sending a low-power read oper-
+		 * ation. This period is measured in cycles of lanebyteclk.
+		 * The counting starts when the D-PHY enters the Stop state
+		 * and causes no interrupts.
+		 */
+		u32 lprd_presp_to_cnt_limit: 16;
+
+		/*
+		 * This field sets a period for which the DWC_mipi_dsi_host
+		 * keeps the link still, after sending a high-speed read oper-
+		 * ation. This period is measured in cycles of lanebyteclk.
+		 * The counting starts when the D-PHY enters the Stop state
+		 * and causes no interrupts.
+		 */
+		u32 hsrd_presp_to_cnt_limit: 16;
+
+		} bits;
+	} RD_PRESP_TO_CONFIG;
+
+	union _0x50 {
+		u32 val;
+		struct _HSWR_PRESP_TO_CONFIG {
+		/*
+		 * This field sets a period for which the DWC_mipi_dsi_host
+		 * keeps the link inactive after sending a high-speed write
+		 * operation. This period is measured in cycles of lanebyteclk.
+		 * The counting starts when the D-PHY enters the Stop state
+		 * and causes no interrupts.
+		 */
+		u32 hswr_presp_to_cnt_limit: 16;
+
+		u32 reserved_0: 8;
+
+		/*
+		 * When set to 1, this bit ensures that the peripheral response
+		 * timeout caused by hs_wr_to_cnt is used only once per eDPI
+		 * frame, when both the following conditions are met:
+		 * dpivsync_edpiwms has risen and fallen.
+		 * Packets originated from eDPI have been transmitted and its
+		 * FIFO is empty again In this scenario no non-eDPI requests
+		 * are sent to the D-PHY, even if there is traffic from generic
+		 * or DBI ready to be sent, making it return to stop state.
+		 * When it does so, PRESP_TO counter is activated and only when
+		 * it finishes does the controller send any other traffic that
+		 * is ready.
+		 */
+		u32 hswr_presp_to_mode: 1;
+
+		u32 reserved_1: 7;
+
+		} bits;
+	} HSWR_PRESP_TO_CONFIG;
+
+	union _0x54 {
+		u32 val;
+		struct _LPWR_PRESP_TO_CONFIG {
+		/*
+		 * This field sets a period for which the DWC_mipi_dsi_host
+		 * keeps the link still, after sending a low-power write oper-
+		 * ation. This period is measured in cycles of lanebyteclk.
+		 * The counting starts when the D-PHY enters the Stop state
+		 * and causes no interrupts.
+		 */
+		u32 lpwr_presp_to_cnt_limit: 16;
+
+		u32 reserved: 16;
+
+		} bits;
+	} LPWR_PRESP_TO_CONFIG;
+
+	union _0x58 {
+		u32 val;
+		struct _BTA_PRESP_TO_CONFIG {
+		/*
+		 * This field sets a period for which the DWC_mipi_dsi_host
+		 * keeps the link still, after completing a Bus Turn-Around.
+		 * This period is measured in cycles of lanebyteclk. The
+		 * counting starts when the D-PHY enters the Stop state and
+		 * causes no interrupts.
+		 */
+		u32 bta_presp_to_cnt_limit: 16;
+
+		u32 reserved: 16;
+
+		} bits;
+	} BTA_PRESP_TO_CONFIG;
+
+	union _0x5C {
+		u32 val;
+		struct _TX_ESC_CLK_CONFIG {
+		/*
+		 * This field indicates the division factor for the TX Escape
+		 * clock source (lanebyteclk). The values 0 and 1 stop the
+		 * TX_ESC clock generation.
+		 */
+		u32 tx_esc_clk_config: 16;
+
+		u32 reserved: 16;
+
+		} bits;
+	} TX_ESC_CLK_CONFIG;
+
+	union _0x60 {
+		u32 val;
+		struct _VACT_CMD_TRANS_LIMIT {
+		/*
+		 * This field is used for the transmission of commands in
+		 * low-power mode. It defines the size, in bytes, of the
+		 * largest packet that can fit in a line during the VACT
+		 * region.
+		 */
+		u32 vact_cmd_trans_limit: 8;
+
+		u32 reserved: 24;
+
+		} bits;
+	} VACT_CMD_TRANS_LIMIT;
+
+	union _0x64 {
+		u32 val;
+		struct _VBLK_CMD_TRANS_LIMIT {
+		/*
+		 * This field is used for the transmission of commands in
+		 * low-power mode. It defines the size, in bytes, of the
+		 * largest packet that can fit in a line during the VSA, VBP,
+		 * and VFP regions.
+		 */
+		u32 vblk_cmd_trans_limit: 8;
+
+		u32 reserved: 24;
+
+		} bits;
+	} VBLK_CMD_TRANS_LIMIT;
+
+	union _0x68 {
+		u32 val;
+		struct _CMD_MODE_CFG {
+		/*
+		 * When set to 1, this bit enables the tearing effect
+		 * acknowledge request.
+		 */
+		u32 tear_fx_en: 1;
+
+		/*
+		 * When set to 1, this bit enables the acknowledge request
+		 * after each packet transmission.
+		 */
+		u32 ack_rqst_en: 1;
+
+		u32 reserved_0: 3;
+
+		u32 pps_tx: 1;
+		u32 exq_tx: 1;
+		u32 cmc_tx: 1;
+
+		/*
+		 * This bit configures the Generic short write packet with
+		 * zero parameter command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 gen_sw_0p_tx: 1;
+
+		/*
+		 * This bit configures the Generic short write packet with
+		 * one parameter command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 gen_sw_1p_tx: 1;
+
+		/*
+		 * This bit configures the Generic short write packet with
+		 * two parameters command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 gen_sw_2p_tx: 1;
+
+		/*
+		 * This bit configures the Generic short read packet with
+		 * zero parameter command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 gen_sr_0p_tx: 1;
+
+		/*
+		 * This bit configures the Generic short read packet with
+		 * one parameter command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 gen_sr_1p_tx: 1;
+
+		/*
+		 * This bit configures the Generic short read packet with
+		 * two parameters command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 gen_sr_2p_tx: 1;
+
+		/*
+		 * This bit configures the Generic long write packet command
+		 * transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 gen_lw_tx: 1;
+
+		u32 reserved_1: 1;
+
+		/*
+		 * This bit configures the DCS short write packet with zero
+		 * parameter command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 dcs_sw_0p_tx: 1;
+
+		/*
+		 * This bit configures the DCS short write packet with one
+		 * parameter command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 dcs_sw_1p_tx: 1;
+
+		/*
+		 * This bit configures the DCS short read packet with zero
+		 * parameter command transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 dcs_sr_0p_tx: 1;
+
+		/*
+		 * This bit configures the DCS long write packet command
+		 * transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 dcs_lw_tx: 1;
+
+		u32 reserved_2: 4;
+
+		/*
+		 * This bit configures the maximum read packet size command
+		 * transmission type:
+		 * 0: High-speed 1: Low-power
+		 */
+		u32 max_rd_pkt_size: 1;
+
+		u32 reserved_3: 7;
+
+		} bits;
+	} CMD_MODE_CFG;
+
+	union _0x6C {
+		u32 val;
+		struct _GEN_HDR {
+		/*
+		 * This field configures the packet data type of the header
+		 * packet.
+		 */
+		u32 gen_dt: 6;
+
+		/*
+		 * This field configures the virtual channel id of the header
+		 * packet.
+		 */
+		u32 gen_vc: 2;
+
+		/*
+		 * This field configures the least significant byte of the
+		 * header packet's Word count for long packets or data 0 for
+		 * short packets.
+		 */
+		u32 gen_wc_lsbyte: 8;
+
+		/*
+		 * This field configures the most significant byte of the
+		 * header packet's word count for long packets or data 1 for
+		 * short packets.
+		 */
+		u32 gen_wc_msbyte: 8;
+
+		u32 reserved: 8;
+
+		} bits;
+	} GEN_HDR;
+
+	union _0x70 {
+		u32 val;
+		struct _GEN_PLD_DATA {
+		/* This field indicates byte 1 of the packet payload. */
+		u32 gen_pld_b1: 8;
+
+		/* This field indicates byte 2 of the packet payload. */
+		u32 gen_pld_b2: 8;
+
+		/* This field indicates byte 3 of the packet payload. */
+		u32 gen_pld_b3: 8;
+
+		/* This field indicates byte 4 of the packet payload. */
+		u32 gen_pld_b4: 8;
+
+		} bits;
+	} GEN_PLD_DATA;
+
+	union _0x74 {
+		u32 val;
+		struct _PHY_CLK_LANE_LP_CTRL {
+		/* This bit controls the D-PHY PPI txrequestclkhs signal */
+		u32 phy_clklane_tx_req_hs: 1;
+
+		/* This bit enables the automatic mechanism to stop providing
+		 * clock in the clock lane when time allows.
+		 */
+		u32 auto_clklane_ctrl_en: 1;
+
+		u32 reserved: 30;
+		} bits;
+	} PHY_CLK_LANE_LP_CTRL;
+
+	union _0x78 {
+		u32 val;
+		struct _PHY_INTERFACE_CTRL {
+		/* When set to 0, this bit places the D-PHY macro in power-
+		 * down state.
+		 */
+		u32 rf_phy_shutdown: 1;
+
+		/* When set to 0, this bit places the digital section of the
+		 * D-PHY in the reset state.
+		 */
+		u32 rf_phy_reset_n: 1;
+
+		/* When set to 1, this bit enables the D-PHY Clock Lane
+		 * module.
+		 */
+		u32 rf_phy_clk_en: 1;
+
+		/* When the D-PHY is in ULPS, this bit enables the D-PHY PLL. */
+		u32 rf_phy_force_pll: 1;
+
+		/* ULPS mode Request on clock lane */
+		u32 rf_phy_clk_txrequlps: 1;
+
+		/* ULPS mode Exit on clock lane */
+		u32 rf_phy_clk_txexitulps: 1;
+
+		/* ULPS mode Request on all active data lanes */
+		u32 rf_phy_data_txrequlps: 1;
+
+		/* ULPS mode Exit on all active data lanes */
+		u32 rf_phy_data_txexitulps: 1;
+
+		u32 reserved: 24;
+		} bits;
+	} PHY_INTERFACE_CTRL;
+
+	union _0x7C {
+		u32 val;
+		struct _PHY_TX_TRIGGERS {
+		/* This field controls the trigger transmissions. */
+		u32 phy_tx_triggers: 4;
+
+		u32 reserved: 28;
+		} bits;
+	} PHY_TX_TRIGGERS;
+
+	union _0x80 {
+		u32 val;
+		struct _DESKEW_START {
+		u32 deskew_start: 1;
+		u32 reserved: 31;
+		} bits;
+	} DESKEW_START;
+
+	union _0x84 {
+		u32 val;
+		struct _DESKEW_MODE {
+		u32 deskew_mode: 2;
+		u32 reserved: 30;
+		} bits;
+	} DESKEW_MODE;
+
+	union _0x88 {
+		u32 val;
+		struct _DESKEW_TIME {
+		u32 deskew_time: 32;
+		} bits;
+	} DESKEW_TIME;
+
+	union _0x8C {
+		u32 val;
+		struct _DESKEW_PERIOD {
+		u32 deskew_period: 32;
+		} bits;
+	} DESKEW_PERIOD;
+
+	union _0x90 {
+		u32 val;
+		struct _DESKEW_BUSY {
+		u32 deskew_busy: 1;
+		u32 reserved: 31;
+		} bits;
+	} DESKEW_BUSY;
+
+	union _0x94 {
+		u32 val;
+		struct _DESKEW_LANE_MASK {
+		u32 deskew_lane0_mask: 1;
+		u32 deskew_lane1_mask: 1;
+		u32 deskew_lane2_mask: 1;
+		u32 deskew_lane3_mask: 1;
+		u32 reserved: 28;
+		} bits;
+	} DESKEW_LANE_MASK;
+
+	union _0x98 {
+		u32 val;
+		struct _CMD_MODE_STATUS {
+		/*
+		 * This bit is set when a read command is issued and cleared
+		 * when the entire response is stored in the FIFO.
+		 * Value after reset: 0x0
+		 *
+		 * NOTE:
+		 * For mipi-dsi-r1p0 IP, this bit is set immediately when
+		 *     the read cmd is set to the GEN_HDR register.
+		 *
+		 * For dsi-ctrl-r1p0 IP, this bit is set only after the read
+		 *     cmd was actually sent out from the controller.
+		 */
+		u32 gen_cmd_rdcmd_ongoing: 1;
+
+		/*
+		 * This bit indicates the empty status of the generic read
+		 * payload FIFO.
+		 * Value after reset: 0x1
+		 */
+		u32 gen_cmd_rdata_fifo_empty: 1;
+
+		/*
+		 * This bit indicates the full status of the generic read
+		 * payload FIFO.
+		 * Value after reset: 0x0
+		 */
+		u32 gen_cmd_rdata_fifo_full: 1;
+
+		/*
+		 * This bit indicates the empty status of the generic write
+		 * payload FIFO.
+		 * Value after reset: 0x1
+		 */
+		u32 gen_cmd_wdata_fifo_empty: 1;
+
+		/*
+		 * This bit indicates the full status of the generic write
+		 * payload FIFO.
+		 * Value after reset: 0x0
+		 */
+		u32 gen_cmd_wdata_fifo_full: 1;
+
+		/*
+		 * This bit indicates the empty status of the generic
+		 * command FIFO.
+		 * Value after reset: 0x1
+		 */
+		u32 gen_cmd_cmd_fifo_empty: 1;
+
+		/*
+		 * This bit indicates the full status of the generic
+		 * command FIFO.
+		 * Value after reset: 0x0
+		 */
+		u32 gen_cmd_cmd_fifo_full: 1;
+
+		/*
+		 * This bit is set when the entire response of read is
+		 * stored in the rx payload FIFO. And it will be cleared
+		 * automaticlly after read this bit each time.
+		 * Value after reset: 0x0
+		 *
+		 * NOTE: this bit is just supported for dsi-ctrl-r1p0 IP
+		 */
+		u32 gen_cmd_rdcmd_done: 1;
+
+		u32 reserved : 24;
+
+		} bits;
+	} CMD_MODE_STATUS;
+
+	union _0x9C {
+		u32 val;
+		struct _PHY_STATUS {
+		/* the status of phydirection D-PHY signal */
+		u32 phy_direction: 1;
+
+		/* the status of phylock D-PHY signal */
+		u32 phy_lock: 1;
+
+		/* the status of rxulpsesc0lane D-PHY signal */
+		u32 phy_rxulpsesc0lane: 1;
+
+		/* the status of phystopstateclklane D-PHY signal */
+		u32 phy_stopstateclklane: 1;
+
+		/* the status of phystopstate0lane D-PHY signal */
+		u32 phy_stopstate0lane: 1;
+
+		/* the status of phystopstate1lane D-PHY signal */
+		u32 phy_stopstate1lane: 1;
+
+		/* the status of phystopstate2lane D-PHY signal */
+		u32 phy_stopstate2lane: 1;
+
+		/* the status of phystopstate3lane D-PHY signal */
+		u32 phy_stopstate3lane: 1;
+
+		/* the status of phyulpsactivenotclk D-PHY signal */
+		u32 phy_ulpsactivenotclk: 1;
+
+		/* the status of ulpsactivenot0lane D-PHY signal */
+		u32 phy_ulpsactivenot0lane: 1;
+
+		/* the status of ulpsactivenot1lane D-PHY signal */
+		u32 phy_ulpsactivenot1lane: 1;
+
+		/* the status of ulpsactivenot2lane D-PHY signal */
+		u32 phy_ulpsactivenot2lane: 1;
+
+		/* the status of ulpsactivenot3lane D-PHY signal */
+		u32 phy_ulpsactivenot3lane: 1;
+
+		u32 reserved: 19;
+
+		} bits;
+	} PHY_STATUS;
+
+	union _0xA0 {
+		u32 val;
+		struct _PHY_MIN_STOP_TIME {
+		/* This field configures the minimum wait period to request
+		 * a high-speed transmission after the Stop state.
+		 */
+		u32 phy_min_stop_time: 8;
+
+		u32 reserved: 24;
+		} bits;
+	} PHY_MIN_STOP_TIME;
+
+	union _0xA4 {
+		u32 val;
+		struct _PHY_LANE_NUM_CONFIG {
+		/*
+		 * This field configures the number of active data lanes:
+		 * 00: One data lane (lane 0)
+		 * 01: Two data lanes (lanes 0 and 1)
+		 * 10: Three data lanes (lanes 0, 1, and 2)
+		 * 11: Four data lanes (lanes 0, 1, 2, and 3)
+		 */
+		u32 phy_lane_num: 2;
+
+		u32 reserved: 30;
+
+		} bits;
+	} PHY_LANE_NUM_CONFIG;
+
+	union _0xA8 {
+		u32 val;
+		struct _PHY_CLKLANE_TIME_CONFIG {
+		/*
+		 * This field configures the maximum time that the D-PHY
+		 * clock lane takes to go from low-power to high-speed
+		 * transmission measured in lane byte clock cycles.
+		 */
+		u32 phy_clklane_lp_to_hs_time: 16;
+
+		/*
+		 * This field configures the maximum time that the D-PHY
+		 * clock lane takes to go from high-speed to low-power
+		 * transmission measured in lane byte clock cycles.
+		 */
+		u32 phy_clklane_hs_to_lp_time: 16;
+
+		} bits;
+	} PHY_CLKLANE_TIME_CONFIG;
+
+	union _0xAC {
+		u32 val;
+		struct _PHY_DATALANE_TIME_CONFIG {
+		/*
+		 * This field configures the maximum time that the D-PHY data
+		 * lanes take to go from low-power to high-speed transmission
+		 * measured in lane byte clock cycles.
+		 */
+		u32 phy_datalane_lp_to_hs_time: 16;
+
+		/*
+		 * This field configures the maximum time that the D-PHY data
+		 * lanes take to go from high-speed to low-power transmission
+		 * measured in lane byte clock cycles.
+		 */
+		u32 phy_datalane_hs_to_lp_time: 16;
+
+		} bits;
+	} PHY_DATALANE_TIME_CONFIG;
+
+	union _0xB0 {
+		u32 val;
+		struct _MAX_READ_TIME {
+		/*
+		 * This field configures the maximum time required to perform
+		 * a read command in lane byte clock cycles. This register can
+		 * only be modified when no read command is in progress.
+		 */
+		u32 max_rd_time: 16;
+
+		u32 reserved: 16;
+
+		} bits;
+	} MAX_READ_TIME;
+
+	union _0xB4 {
+		u32 val;
+		struct _RX_PKT_CHECK_CONFIG {
+		/* When set to 1, this bit enables the ECC reception, error
+		 * correction, and reporting.
+		 */
+		u32 rx_pkt_ecc_en: 1;
+
+		/* When set to 1, this bit enables the CRC reception and error
+		 * reporting.
+		 */
+		u32 rx_pkt_crc_en: 1;
+
+		u32 reserved: 30;
+
+		} bits;
+	} RX_PKT_CHECK_CONFIG;
+
+	union _0xB8 {
+		u32 val;
+		struct _TA_EN {
+		/* When set to 1, this bit enables the Bus Turn-Around (BTA)
+		 * request.
+		 */
+		u32 ta_en: 1;
+
+		u32 reserved: 31;
+
+		} bits;
+	} TA_EN;
+
+	union _0xBC {
+		u32 val;
+		struct _EOTP_EN {
+		/* When set to 1, this bit enables the EoTp transmission */
+		u32 tx_eotp_en: 1;
+
+		/* When set to 1, this bit enables the EoTp reception. */
+		u32 rx_eotp_en: 1;
+
+		u32 reserved: 30;
+
+		} bits;
+	} EOTP_EN;
+
+	union _0xC0 {
+		u32 val;
+		struct _VIDEO_NULLPKT_SIZE {
+		/*
+		 * This register configures the number of bytes inside a null
+		 * packet. Setting it to 0 disables the null packets.
+		 */
+		u32 video_nullpkt_size: 13;
+
+		u32 reserved: 19;
+
+		} bits;
+	} VIDEO_NULLPKT_SIZE;
+
+	union _0xC4 {
+		u32 val;
+		struct _DCS_WM_PKT_SIZE {
+		/*
+		 * This field configures the maximum allowed size for an eDPI
+		 * write memory command, measured in pixels. Automatic parti-
+		 * tioning of data obtained from eDPI is permanently enabled.
+		 */
+		u32 dcs_wm_pkt_size: 16;
+
+		u32 reserved: 16;
+		} bits;
+	} DCS_WM_PKT_SIZE;
+
+	union _0xC8 {
+		u32 val;
+		struct _PROTOCOL_INT_CLR {
+		u32 clr_dphy_errors_0: 1;
+		u32 clr_dphy_errors_1: 1;
+		u32 clr_dphy_errors_2: 1;
+		u32 clr_dphy_errors_3: 1;
+		u32 clr_dphy_errors_4: 1;
+		u32 clr_protocol_debug_err: 11;
+		u32 clr_ack_with_err_0: 1;
+		u32 clr_ack_with_err_1: 1;
+		u32 clr_ack_with_err_2: 1;
+		u32 clr_ack_with_err_3: 1;
+		u32 clr_ack_with_err_4: 1;
+		u32 clr_ack_with_err_5: 1;
+		u32 clr_ack_with_err_6: 1;
+		u32 clr_ack_with_err_7: 1;
+		u32 clr_ack_with_err_8: 1;
+		u32 clr_ack_with_err_9: 1;
+		u32 clr_ack_with_err_10: 1;
+		u32 clr_ack_with_err_11: 1;
+		u32 clr_ack_with_err_12: 1;
+		u32 clr_ack_with_err_13: 1;
+		u32 clr_ack_with_err_14: 1;
+		u32 clr_ack_with_err_15: 1;
+		} bits;
+	} PROTOCOL_INT_CLR;
+
+	union _0xCC {
+		u32 val;
+		struct _INTERNAL_INT_CLR {
+		u32 clr_receive_pkt_size_err: 1;
+		u32 clr_eopt_not_receive_err: 1;
+		u32 clr_gen_cmd_cmd_fifo_wr_err: 1;
+		u32 clr_gen_cmd_rdata_fifo_rd_err: 1;
+		u32 clr_gen_cmd_rdata_fifo_wr_err: 1;
+		u32 clr_gen_cmd_wdata_fifo_wr_err: 1;
+		u32 clr_gen_cmd_wdata_fifo_rd_err: 1;
+		u32 clr_dpi_pix_fifo_wr_err: 1;
+		u32 clr_internal_debug_err: 19;
+		u32 clr_ecc_single_err: 1;
+		u32 clr_ecc_multi_err: 1;
+		u32 clr_crc_err: 1;
+		u32 clr_hs_tx_timeout: 1;
+		u32 clr_lp_rx_timeout: 1;
+		} bits;
+	} INTERNAL_INT_CLR;
+
+	union _0xD0 {
+		u32 val;
+		struct _VIDEO_SIG_DELAY_CONFIG {
+
+		/*
+		 * DPI interface signal delay to be used in clk lanebyte
+		 * domain for control logic to read video data from pixel
+		 * memory in mannal mode, measured in clk_lanebyte cycles
+		 */
+		u32 video_sig_delay: 24;
+
+		/*
+		 * 1'b1: mannal mode
+		 *       dsi controller will use video_sig_delay value as
+		 *       the delay for the packet handle logic to read video
+		 *       data from pixel memory.
+		 *
+		 * 1'b0: auto mode
+		 *       dsi controller will auto calculate the delay for
+		 *       the packet handle logic to read video data from
+		 *       pixel memory.
+		 */
+		u32 video_sig_delay_mode: 1;
+
+		u32 reserved: 7;
+		} bits;
+	} VIDEO_SIG_DELAY_CONFIG;
+
+	u32 reservedD4_EC[7];
+
+	union _0xF0 {
+		u32 val;
+		struct _PHY_TST_CTRL0 {
+		/* PHY test interface clear (active high) */
+		u32 phy_testclr: 1;
+
+		/* This bit is used to clock the TESTDIN bus into the D-PHY */
+		u32 phy_testclk: 1;
+
+		u32 reserved: 30;
+		} bits;
+	} PHY_TST_CTRL0;
+
+	union _0xF4 {
+		u32 val;
+		struct _PHY_TST_CTRL1 {
+		/* PHY test interface input 8-bit data bus for internal
+		 * register programming and test functionalities access.
+		 */
+		u32 phy_testdin: 8;
+
+		/* PHY output 8-bit data bus for read-back and internal
+		 * probing functionalities.
+		 */
+		u32 phy_testdout: 8;
+
+		/*
+		 * PHY test interface operation selector:
+		 * 1: The address write operation is set on the falling edge
+		 *    of the testclk signal.
+		 * 0: The data write operation is set on the rising edge of
+		 *    the testclk signal.
+		 */
+		u32 phy_testen: 1;
+
+		u32 reserved: 15;
+		} bits;
+	} PHY_TST_CTRL1;
+
+	u32 reservedF8_1FC[66];
+
+	union _0x200 {
+		u32 val;
+		struct _INT_PLL_STS {
+		u32 int_pll_sts: 1;
+		u32 reserved: 31;
+		} bits;
+	} INT_PLL_STS;
+
+	union _0x204 {
+		u32 val;
+		struct _INT_PLL_MSK {
+		u32 int_pll_msk: 1;
+		u32 reserved: 31;
+		} bits;
+	} INT_PLL_MSK;
+
+	union _0x208 {
+		u32 val;
+		struct _INT_PLL_CLR {
+		u32 int_pll_clr: 1;
+		u32 reserved: 31;
+		} bits;
+	} INT_PLL_CLR;
+
+};
+
+void dsi_power_enable(struct dsi_context *ctx, int enable);
+void dsi_video_mode(struct dsi_context *ctx);
+void dsi_cmd_mode(struct dsi_context *ctx);
+bool dsi_is_cmd_mode(struct dsi_context *ctx);
+void dsi_rx_vcid(struct dsi_context *ctx, u8 vc);
+void dsi_video_vcid(struct dsi_context *ctx, u8 vc);
+void dsi_dpi_video_burst_mode(struct dsi_context *ctx, int mode);
+void dsi_dpi_color_coding(struct dsi_context *ctx, int coding);
+void dsi_dpi_sig_delay(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_dpi_hline_time(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_dpi_hsync_time(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_dpi_hbp_time(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_dpi_vact(struct dsi_context *ctx, u16 lines);
+void dsi_dpi_vfp(struct dsi_context *ctx, u16 lines);
+void dsi_dpi_vbp(struct dsi_context *ctx, u16 lines);
+void dsi_dpi_vsync(struct dsi_context *ctx, u16 lines);
+void dsi_dpi_hporch_lp_en(struct dsi_context *ctx, int enable);
+void dsi_dpi_vporch_lp_en(struct dsi_context *ctx, int enable);
+void dsi_dpi_frame_ack_en(struct dsi_context *ctx, int enable);
+void dsi_dpi_chunk_num(struct dsi_context *ctx, u16 no);
+void dsi_dpi_null_packet_size(struct dsi_context *ctx, u16 size);
+void dsi_dpi_video_packet_size(struct dsi_context *ctx, u16 size);
+void dsi_edpi_max_pkt_size(struct dsi_context *ctx, u16 size);
+void dsi_tear_effect_ack_en(struct dsi_context *ctx, int enable);
+void dsi_cmd_mode_lp_cmd_en(struct dsi_context *ctx, int enable);
+void dsi_video_mode_lp_cmd_en(struct dsi_context *ctx, int enable);
+void dsi_set_packet_header(struct dsi_context *ctx, u8 vc, u8 type,
+						u8 wc_lsb, u8 wc_msb);
+void dsi_set_packet_payload(struct dsi_context *ctx, u32 payload);
+u32 dsi_get_rx_payload(struct dsi_context *ctx);
+void dsi_bta_en(struct dsi_context *ctx, int enable);
+void dsi_eotp_rx_en(struct dsi_context *ctx, int enable);
+void dsi_eotp_tx_en(struct dsi_context *ctx, int enable);
+void dsi_ecc_rx_en(struct dsi_context *ctx, int enable);
+void dsi_crc_rx_en(struct dsi_context *ctx, int enable);
+bool dsi_is_bta_returned(struct dsi_context *ctx);
+bool dsi_is_rx_payload_fifo_full(struct dsi_context *ctx);
+bool dsi_is_rx_payload_fifo_empty(struct dsi_context *ctx);
+bool dsi_is_tx_payload_fifo_full(struct dsi_context *ctx);
+bool dsi_is_tx_payload_fifo_empty(struct dsi_context *ctx);
+bool dsi_is_tx_cmd_fifo_empty(struct dsi_context *ctx);
+void dsi_datalane_hs2lp_config(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_datalane_lp2hs_config(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_clklane_hs2lp_config(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_clklane_lp2hs_config(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_max_read_time(struct dsi_context *ctx, u16 byte_cycle);
+void dsi_nc_clk_en(struct dsi_context *ctx, int enable);
+void dsi_tx_escape_division(struct dsi_context *ctx, u8 div);
+void dsi_timeout_clock_division(struct dsi_context *ctx, u8 div);
+void dsi_lp_rx_timeout(struct dsi_context *ctx, u16 count);
+void dsi_hs_tx_timeout(struct dsi_context *ctx, u16 count);
+u32 dsi_int0_status(struct dsi_context *ctx);
+u32 dsi_int1_status(struct dsi_context *ctx);
+void dsi_int0_mask(struct dsi_context *ctx, u32 mask);
+void dsi_int1_mask(struct dsi_context *ctx, u32 mask);
+
+#endif /* _DW_DSI_CTRL_H_ */
diff --git a/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c b/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c
new file mode 100644
index 0000000..b3f4624
--- /dev/null
+++ b/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c
@@ -0,0 +1,276 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include "dw_dsi_ctrl.h"
+#include "dw_dsi_ctrl_ppi.h"
+#include "sprd_dphy.h"
+
+/*
+ * Reset D-PHY module
+ */
+void dsi_phy_rstz(struct dphy_context *ctx, int level)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x78 phy_interface_ctrl;
+
+	phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL);
+	phy_interface_ctrl.bits.rf_phy_reset_n = level;
+
+	writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL);
+}
+
+/*
+ * Power up/down D-PHY module
+ */
+void dsi_phy_shutdownz(struct dphy_context *ctx, int level)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x78 phy_interface_ctrl;
+
+	phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL);
+	phy_interface_ctrl.bits.rf_phy_shutdown = level;
+
+	writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL);
+}
+
+/*
+ * Force D-PHY PLL to stay on while in ULPS
+ */
+void dsi_phy_force_pll(struct dphy_context *ctx, int force)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x78 phy_interface_ctrl;
+
+	phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL);
+	phy_interface_ctrl.bits.rf_phy_force_pll = force;
+
+	writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL);
+}
+
+void dsi_phy_clklane_ulps_rqst(struct dphy_context *ctx, int en)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x78 phy_interface_ctrl;
+
+	phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL);
+	phy_interface_ctrl.bits.rf_phy_clk_txrequlps = en;
+
+	writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL);
+}
+
+void dsi_phy_clklane_ulps_exit(struct dphy_context *ctx, int en)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x78 phy_interface_ctrl;
+
+	phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL);
+	phy_interface_ctrl.bits.rf_phy_clk_txexitulps = en;
+
+	writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL);
+}
+
+void dsi_phy_datalane_ulps_rqst(struct dphy_context *ctx, int en)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x78 phy_interface_ctrl;
+
+	phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL);
+	phy_interface_ctrl.bits.rf_phy_data_txrequlps = en;
+
+	writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL);
+}
+
+void dsi_phy_datalane_ulps_exit(struct dphy_context *ctx, int en)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x78 phy_interface_ctrl;
+
+	phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL);
+	phy_interface_ctrl.bits.rf_phy_data_txexitulps = en;
+
+	writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL);
+}
+
+/*
+ * Configure minimum wait period for HS transmission request after a stop state
+ */
+void dsi_phy_stop_wait_time(struct dphy_context *ctx, u8 byte_cycle)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+
+	writel(byte_cycle, &reg->PHY_MIN_STOP_TIME);
+}
+
+/*
+ * Set number of active lanes
+ */
+void dsi_phy_datalane_en(struct dphy_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+
+	writel(ctx->lanes - 1, &reg->PHY_LANE_NUM_CONFIG);
+}
+
+/*
+ * Enable clock lane module
+ */
+void dsi_phy_clklane_en(struct dphy_context *ctx, int en)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x78 phy_interface_ctrl;
+
+	phy_interface_ctrl.val = readl(&reg->PHY_INTERFACE_CTRL);
+	phy_interface_ctrl.bits.rf_phy_clk_en = en;
+
+	writel(phy_interface_ctrl.val, &reg->PHY_INTERFACE_CTRL);
+}
+
+/*
+ * Request the PHY module to start transmission of high speed clock.
+ * This causes the clock lane to start transmitting DDR clock on the
+ * lane interconnect.
+ */
+void dsi_phy_clk_hs_rqst(struct dphy_context *ctx, int enable)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x74 phy_clk_lane_lp_ctrl;
+
+	phy_clk_lane_lp_ctrl.val = readl(&reg->PHY_CLK_LANE_LP_CTRL);
+	phy_clk_lane_lp_ctrl.bits.auto_clklane_ctrl_en = 0;
+	phy_clk_lane_lp_ctrl.bits.phy_clklane_tx_req_hs = enable;
+
+	writel(phy_clk_lane_lp_ctrl.val, &reg->PHY_CLK_LANE_LP_CTRL);
+}
+
+/*
+ * Get D-PHY PPI status
+ */
+u8 dsi_phy_is_pll_locked(struct dphy_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x9C phy_status;
+
+	phy_status.val = readl(&reg->PHY_STATUS);
+
+	return phy_status.bits.phy_lock;
+}
+
+u8 dsi_phy_is_stop_state_datalane(struct dphy_context *ctx)
+{
+	u8 state = 0;
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x9C phy_status;
+
+	phy_status.val = readl(&reg->PHY_STATUS);
+
+	if (phy_status.bits.phy_stopstate0lane)
+		state |= BIT(0);
+	if (phy_status.bits.phy_stopstate1lane)
+		state |= BIT(1);
+	if (phy_status.bits.phy_stopstate2lane)
+		state |= BIT(2);
+	if (phy_status.bits.phy_stopstate3lane)
+		state |= BIT(3);
+
+	return state;
+}
+
+u8 dsi_phy_is_stop_state_clklane(struct dphy_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x9C phy_status;
+
+	phy_status.val = readl(&reg->PHY_STATUS);
+
+	return phy_status.bits.phy_stopstateclklane;
+}
+
+u8 dsi_phy_is_ulps_active_datalane(struct dphy_context *ctx)
+{
+	u8 state = 0;
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x9C phy_status;
+
+	phy_status.val = readl(&reg->PHY_STATUS);
+
+	if (!phy_status.bits.phy_ulpsactivenot0lane)
+		state |= BIT(0);
+	if (!phy_status.bits.phy_ulpsactivenot1lane)
+		state |= BIT(1);
+	if (!phy_status.bits.phy_ulpsactivenot2lane)
+		state |= BIT(2);
+	if (!phy_status.bits.phy_ulpsactivenot3lane)
+		state |= BIT(3);
+
+	return state;
+}
+
+u8 dsi_phy_is_ulps_active_clklane(struct dphy_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0x9C phy_status;
+
+	phy_status.val = readl(&reg->PHY_STATUS);
+
+	return !phy_status.bits.phy_ulpsactivenotclk;
+}
+
+void dsi_phy_test_clk(struct dphy_context *ctx, u8 value)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0xF0 phy_tst_ctrl0;
+
+	phy_tst_ctrl0.val = readl(&reg->PHY_TST_CTRL0);
+	phy_tst_ctrl0.bits.phy_testclk = value;
+
+	writel(phy_tst_ctrl0.val, &reg->PHY_TST_CTRL0);
+}
+
+void dsi_phy_test_clr(struct dphy_context *ctx, u8 value)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0xF0 phy_tst_ctrl0;
+
+	phy_tst_ctrl0.val = readl(&reg->PHY_TST_CTRL0);
+	phy_tst_ctrl0.bits.phy_testclr = value;
+
+	writel(phy_tst_ctrl0.val, &reg->PHY_TST_CTRL0);
+}
+
+void dsi_phy_test_en(struct dphy_context *ctx, u8 value)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0xF4 phy_tst_ctrl1;
+
+	phy_tst_ctrl1.val = readl(&reg->PHY_TST_CTRL1);
+	phy_tst_ctrl1.bits.phy_testen = value;
+
+	writel(phy_tst_ctrl1.val, &reg->PHY_TST_CTRL1);
+}
+
+u8 dsi_phy_test_dout(struct dphy_context *ctx)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0xF4 phy_tst_ctrl1;
+
+	phy_tst_ctrl1.val = readl(&reg->PHY_TST_CTRL1);
+
+	return phy_tst_ctrl1.bits.phy_testdout;
+}
+
+void dsi_phy_test_din(struct dphy_context *ctx, u8 data)
+{
+	struct dsi_reg *reg = (struct dsi_reg *)ctx->ctrlbase;
+	union _0xF4 phy_tst_ctrl1;
+
+	phy_tst_ctrl1.val = readl(&reg->PHY_TST_CTRL1);
+	phy_tst_ctrl1.bits.phy_testdin = data;
+
+	writel(phy_tst_ctrl1.val, &reg->PHY_TST_CTRL1);
+}
diff --git a/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h b/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h
new file mode 100644
index 0000000..eecdd71
--- /dev/null
+++ b/drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#ifndef _DW_DSI_CTRL_PPI_H_
+#define _DW_DSI_CTRL_PPI_H_
+
+#include "sprd_dphy.h"
+
+void dsi_phy_rstz(struct dphy_context *ctx, int level);
+void dsi_phy_shutdownz(struct dphy_context *ctx, int level);
+void dsi_phy_force_pll(struct dphy_context *ctx, int force);
+void dsi_phy_clklane_ulps_rqst(struct dphy_context *ctx, int en);
+void dsi_phy_clklane_ulps_exit(struct dphy_context *ctx, int en);
+void dsi_phy_datalane_ulps_rqst(struct dphy_context *ctx, int en);
+void dsi_phy_datalane_ulps_exit(struct dphy_context *ctx, int en);
+void dsi_phy_stop_wait_time(struct dphy_context *ctx, u8 byte_clk);
+void dsi_phy_datalane_en(struct dphy_context *ctx);
+void dsi_phy_clklane_en(struct dphy_context *ctx, int en);
+void dsi_phy_clk_hs_rqst(struct dphy_context *ctx, int en);
+u8 dsi_phy_is_pll_locked(struct dphy_context *ctx);
+u8 dsi_phy_is_stop_state_clklane(struct dphy_context *ctx);
+u8 dsi_phy_is_stop_state_datalane(struct dphy_context *ctx);
+u8 dsi_phy_is_ulps_active_datalane(struct dphy_context *ctx);
+u8 dsi_phy_is_ulps_active_clklane(struct dphy_context *ctx);
+void dsi_phy_test_clk(struct dphy_context *ctx, u8 level);
+void dsi_phy_test_clr(struct dphy_context *ctx, u8 level);
+void dsi_phy_test_en(struct dphy_context *ctx, u8 level);
+u8 dsi_phy_test_dout(struct dphy_context *ctx);
+void dsi_phy_test_din(struct dphy_context *ctx, u8 data);
+void dsi_phy_bist_en(struct dphy_context *ctx, int en);
+
+#endif /* _DW_DSI_CTRL_PPI_H_ */
\ No newline at end of file
diff --git a/drivers/gpu/drm/sprd/megacores_pll.c b/drivers/gpu/drm/sprd/megacores_pll.c
new file mode 100644
index 0000000..8527eea
--- /dev/null
+++ b/drivers/gpu/drm/sprd/megacores_pll.c
@@ -0,0 +1,315 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#include <asm/div64.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/regmap.h>
+#include <linux/string.h>
+
+#include "megacores_pll.h"
+
+#define L						0
+#define H						1
+#define CLK						0
+#define DATA					1
+#define INFINITY				0xffffffff
+#define MIN_OUTPUT_FREQ			(100)
+
+#define AVERAGE(a, b) (min(a, b) + abs((b) - (a)) / 2)
+
+/* sharkle */
+#define VCO_BAND_LOW	750
+#define VCO_BAND_MID	1100
+#define VCO_BAND_HIGH	1500
+#define PHY_REF_CLK	26000
+
+static int dphy_calc_pll_param(struct dphy_pll *pll)
+{
+	const u32 khz = 1000;
+	const u32 mhz = 1000000;
+	const unsigned long long factor = 100;
+	unsigned long long tmp;
+	int i;
+
+	pll->potential_fvco = pll->freq / khz;
+	pll->ref_clk = PHY_REF_CLK / khz;
+
+	for (i = 0; i < 4; ++i) {
+		if (pll->potential_fvco >= VCO_BAND_LOW &&
+			pll->potential_fvco <= VCO_BAND_HIGH) {
+			pll->fvco = pll->potential_fvco;
+			pll->out_sel = BIT(i);
+			break;
+		}
+		pll->potential_fvco <<= 1;
+	}
+	if (pll->fvco == 0)
+		return -EINVAL;
+
+	if (pll->fvco >= VCO_BAND_LOW && pll->fvco <= VCO_BAND_MID) {
+		/* vco band control */
+		pll->vco_band = 0x0;
+		/* low pass filter control */
+		pll->lpf_sel = 1;
+	} else if (pll->fvco > VCO_BAND_MID && pll->fvco <= VCO_BAND_HIGH) {
+		pll->vco_band = 0x1;
+		pll->lpf_sel = 0;
+	} else
+		return -EINVAL;
+
+	pll->nint = pll->fvco / pll->ref_clk;
+	tmp = pll->fvco * factor * mhz;
+	do_div(tmp, pll->ref_clk);
+	tmp = tmp - pll->nint * factor * mhz;
+	tmp *= BIT(20);
+	do_div(tmp, 100000000);
+	pll->kint = (u32)tmp;
+	pll->refin = 3; /* pre-divider bypass */
+	pll->sdm_en = true; /* use fraction N PLL */
+	pll->fdk_s = 0x1; /* fraction */
+	pll->cp_s = 0x0;
+	pll->det_delay = 0x1;
+
+	return 0;
+}
+
+static void dphy_set_pll_reg(struct dphy_pll *pll, struct regmap *regmap)
+{
+	struct pll_reg *reg = &pll->reg;
+	u8 *val;
+	int i;
+
+	u8 reg_addr[] = {
+		0x03, 0x04, 0x06, 0x08, 0x09,
+		0x0a, 0x0b, 0x0e, 0x0f
+	};
+
+	reg->_03.bits.prbs_bist = 1;
+	reg->_03.bits.en_lp_treot = true;
+	reg->_03.bits.lpf_sel = pll->lpf_sel;
+	reg->_03.bits.txfifo_bypass = 0;
+	reg->_04.bits.div = pll->div;
+	reg->_04.bits.masterof8lane = 1;
+	reg->_04.bits.cp_s = pll->cp_s;
+	reg->_04.bits.fdk_s = pll->fdk_s;
+	reg->_06.bits.nint = pll->nint;
+	reg->_08.bits.vco_band = pll->vco_band;
+	reg->_08.bits.sdm_en = pll->sdm_en;
+	reg->_08.bits.refin = pll->refin;
+	reg->_09.bits.kint_h = pll->kint >> 12;
+	reg->_0a.bits.kint_m = (pll->kint >> 4) & 0xff;
+	reg->_0b.bits.out_sel = pll->out_sel;
+	reg->_0b.bits.kint_l = pll->kint & 0xf;
+	reg->_0e.bits.pll_pu_byp = 0;
+	reg->_0e.bits.pll_pu = 0;
+	reg->_0e.bits.stopstate_sel = 1;
+	reg->_0f.bits.det_delay = pll->det_delay;
+
+	val = (u8 *)&reg;
+
+	for (i = 0; i < sizeof(reg_addr); ++i) {
+		regmap_write(regmap, reg_addr[i], val[i]);
+		DRM_DEBUG("%02x: %02x\n", reg_addr[i], val[i]);
+	}
+}
+
+int dphy_pll_config(struct dphy_context *ctx)
+{
+	struct regmap *regmap = ctx->regmap;
+	struct dphy_pll *pll = ctx->pll;
+	int ret;
+
+	pll->freq = ctx->freq;
+
+	/* FREQ = 26M * (NINT + KINT / 2^20) / out_sel */
+	ret = dphy_calc_pll_param(pll);
+	if (ret) {
+		DRM_ERROR("failed to calculate dphy pll parameters\n");
+		return ret;
+	}
+	dphy_set_pll_reg(pll, regmap);
+
+	return 0;
+}
+
+static void dphy_set_timing_reg(struct regmap *regmap, int type, u8 val[])
+{
+	switch (type) {
+	case REQUEST_TIME:
+		regmap_write(regmap, 0x31, val[CLK]);
+		regmap_write(regmap, 0x41, val[DATA]);
+		regmap_write(regmap, 0x51, val[DATA]);
+		regmap_write(regmap, 0x61, val[DATA]);
+		regmap_write(regmap, 0x71, val[DATA]);
+
+		regmap_write(regmap, 0x90, val[CLK]);
+		regmap_write(regmap, 0xa0, val[DATA]);
+		regmap_write(regmap, 0xb0, val[DATA]);
+		regmap_write(regmap, 0xc0, val[DATA]);
+		regmap_write(regmap, 0xd0, val[DATA]);
+		break;
+	case PREPARE_TIME:
+		regmap_write(regmap, 0x32, val[CLK]);
+		regmap_write(regmap, 0x42, val[DATA]);
+		regmap_write(regmap, 0x52, val[DATA]);
+		regmap_write(regmap, 0x62, val[DATA]);
+		regmap_write(regmap, 0x72, val[DATA]);
+
+		regmap_write(regmap, 0x91, val[CLK]);
+		regmap_write(regmap, 0xa1, val[DATA]);
+		regmap_write(regmap, 0xb1, val[DATA]);
+		regmap_write(regmap, 0xc1, val[DATA]);
+		regmap_write(regmap, 0xd1, val[DATA]);
+		break;
+	case ZERO_TIME:
+		regmap_write(regmap, 0x33, val[CLK]);
+		regmap_write(regmap, 0x43, val[DATA]);
+		regmap_write(regmap, 0x53, val[DATA]);
+		regmap_write(regmap, 0x63, val[DATA]);
+		regmap_write(regmap, 0x73, val[DATA]);
+
+		regmap_write(regmap, 0x92, val[CLK]);
+		regmap_write(regmap, 0xa2, val[DATA]);
+		regmap_write(regmap, 0xb2, val[DATA]);
+		regmap_write(regmap, 0xc2, val[DATA]);
+		regmap_write(regmap, 0xd2, val[DATA]);
+		break;
+	case TRAIL_TIME:
+		regmap_write(regmap, 0x34, val[CLK]);
+		regmap_write(regmap, 0x44, val[DATA]);
+		regmap_write(regmap, 0x54, val[DATA]);
+		regmap_write(regmap, 0x64, val[DATA]);
+		regmap_write(regmap, 0x74, val[DATA]);
+
+		regmap_write(regmap, 0x93, val[CLK]);
+		regmap_write(regmap, 0xa3, val[DATA]);
+		regmap_write(regmap, 0xb3, val[DATA]);
+		regmap_write(regmap, 0xc3, val[DATA]);
+		regmap_write(regmap, 0xd3, val[DATA]);
+		break;
+	case EXIT_TIME:
+		regmap_write(regmap, 0x36, val[CLK]);
+		regmap_write(regmap, 0x46, val[DATA]);
+		regmap_write(regmap, 0x56, val[DATA]);
+		regmap_write(regmap, 0x66, val[DATA]);
+		regmap_write(regmap, 0x76, val[DATA]);
+
+		regmap_write(regmap, 0x95, val[CLK]);
+		regmap_write(regmap, 0xA5, val[DATA]);
+		regmap_write(regmap, 0xB5, val[DATA]);
+		regmap_write(regmap, 0xc5, val[DATA]);
+		regmap_write(regmap, 0xd5, val[DATA]);
+		break;
+	case CLKPOST_TIME:
+		regmap_write(regmap, 0x35, val[CLK]);
+		regmap_write(regmap, 0x94, val[CLK]);
+		break;
+
+	/* the following just use default value */
+	case SETTLE_TIME:
+	case TA_GET:
+	case TA_GO:
+	case TA_SURE:
+		break;
+	default:
+		break;
+	}
+}
+
+void dphy_timing_config(struct dphy_context *ctx)
+{
+	struct regmap *regmap = ctx->regmap;
+	const u32 factor = 2;
+	const u32 scale = 100;
+	u32 t_ui, t_byteck, t_half_byteck;
+	u32 range[2], constant;
+	u8 val[2];
+	u32 tmp = 0;
+
+	/* t_ui: 1 ui, byteck: 8 ui, half byteck: 4 ui */
+	t_ui = 1000 * scale / (ctx->freq / 1000);
+	t_byteck = t_ui << 3;
+	t_half_byteck = t_ui << 2;
+	constant = t_ui << 1;
+
+	/* REQUEST_TIME: HS T-LPX: LP-01
+	 * For T-LPX, mipi spec defined min value is 50ns,
+	 * but maybe it shouldn't be too small, because BTA,
+	 * LP-10, LP-00, LP-01, all of this is related to T-LPX.
+	 */
+	range[L] = 50 * scale;
+	range[H] = INFINITY;
+	val[CLK] = DIV_ROUND_UP(range[L] * (factor << 1), t_byteck) - 2;
+	val[DATA] = val[CLK];
+	dphy_set_timing_reg(regmap, REQUEST_TIME, val);
+
+	/* PREPARE_TIME: HS sequence: LP-00 */
+	range[L] = 38 * scale;
+	range[H] = 95 * scale;
+	tmp = AVERAGE(range[L], range[H]);
+	val[CLK] = DIV_ROUND_UP(AVERAGE(range[L], range[H]),
+			t_half_byteck) - 1;
+	range[L] = 40 * scale + 4 * t_ui;
+	range[H] = 85 * scale + 6 * t_ui;
+	tmp |= AVERAGE(range[L], range[H]) << 16;
+	val[DATA] = DIV_ROUND_UP(AVERAGE(range[L], range[H]),
+			t_half_byteck) - 1;
+	dphy_set_timing_reg(regmap, PREPARE_TIME, val);
+
+	/* ZERO_TIME: HS-ZERO */
+	range[L] = 300 * scale;
+	range[H] = INFINITY;
+	val[CLK] = DIV_ROUND_UP(range[L] * factor + (tmp & 0xffff)
+			- 525 * t_byteck / 100, t_byteck) - 2;
+	range[L] = 145 * scale + 10 * t_ui;
+	val[DATA] = DIV_ROUND_UP(range[L] * factor
+			+ ((tmp >> 16) & 0xffff) - 525 * t_byteck / 100,
+			t_byteck) - 2;
+	dphy_set_timing_reg(regmap, ZERO_TIME, val);
+
+	/* TRAIL_TIME: HS-TRAIL */
+	range[L] = 60 * scale;
+	range[H] = INFINITY;
+	val[CLK] = DIV_ROUND_UP(range[L] * factor - constant, t_half_byteck);
+	range[L] = max(8 * t_ui, 60 * scale + 4 * t_ui);
+	val[DATA] = DIV_ROUND_UP(range[L] * 3 / 2 - constant, t_half_byteck) - 2;
+	dphy_set_timing_reg(regmap, TRAIL_TIME, val);
+
+	/* EXIT_TIME: */
+	range[L] = 100 * scale;
+	range[H] = INFINITY;
+	val[CLK] = DIV_ROUND_UP(range[L] * factor, t_byteck) - 2;
+	val[DATA] = val[CLK];
+	dphy_set_timing_reg(regmap, EXIT_TIME, val);
+
+	/* CLKPOST_TIME: */
+	range[L] = 60 * scale + 52 * t_ui;
+	range[H] = INFINITY;
+	val[CLK] = DIV_ROUND_UP(range[L] * factor, t_byteck) - 2;
+	val[DATA] = val[CLK];
+	dphy_set_timing_reg(regmap, CLKPOST_TIME, val);
+
+	/* SETTLE_TIME:
+	 * This time is used for receiver. So for transmitter,
+	 * it can be ignored.
+	 */
+
+	/* TA_GO:
+	 * transmitter drives bridge state(LP-00) before releasing control,
+	 * reg 0x1f default value: 0x04, which is good.
+	 */
+
+	/* TA_SURE:
+	 * After LP-10 state and before bridge state(LP-00),
+	 * reg 0x20 default value: 0x01, which is good.
+	 */
+
+	/* TA_GET:
+	 * receiver drives Bridge state(LP-00) before releasing control
+	 * reg 0x21 default value: 0x03, which is good.
+	 */
+}
diff --git a/drivers/gpu/drm/sprd/megacores_pll.h b/drivers/gpu/drm/sprd/megacores_pll.h
new file mode 100644
index 0000000..0e82099
--- /dev/null
+++ b/drivers/gpu/drm/sprd/megacores_pll.h
@@ -0,0 +1,146 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#ifndef _MEGACORES_PLL_H_
+#define _MEGACORES_PLL_H_
+
+#include "sprd_dphy.h"
+
+enum PLL_TIMING {
+	NONE,
+	REQUEST_TIME,
+	PREPARE_TIME,
+	SETTLE_TIME,
+	ZERO_TIME,
+	TRAIL_TIME,
+	EXIT_TIME,
+	CLKPOST_TIME,
+	TA_GET,
+	TA_GO,
+	TA_SURE,
+	TA_WAIT,
+};
+
+struct pll_reg {
+	union __reg_03__ {
+		struct __03 {
+			u8 prbs_bist: 1;
+			u8 en_lp_treot: 1;
+			u8 lpf_sel: 4;
+			u8 txfifo_bypass: 1;
+			u8 freq_hopping: 1;
+		} bits;
+		u8 val;
+	} _03;
+	union __reg_04__ {
+		struct __04 {
+			u8 div: 3;
+			u8 masterof8lane: 1;
+			u8 hop_trig: 1;
+			u8 cp_s: 2;
+			u8 fdk_s: 1;
+		} bits;
+		u8 val;
+	} _04;
+	union __reg_06__ {
+		struct __06 {
+			u8 nint: 7;
+			u8 mod_en: 1;
+		} bits;
+		u8 val;
+	} _06;
+	union __reg_07__ {
+		struct __07 {
+			u8 kdelta_h: 8;
+		} bits;
+		u8 val;
+	} _07;
+	union __reg_08__ {
+		struct __08 {
+			u8 vco_band: 1;
+			u8 sdm_en: 1;
+			u8 refin: 2;
+			u8 kdelta_l: 4;
+		} bits;
+		u8 val;
+	} _08;
+	union __reg_09__ {
+		struct __09 {
+			u8 kint_h: 8;
+		} bits;
+		u8 val;
+	} _09;
+	union __reg_0a__ {
+		struct __0a {
+			u8 kint_m: 8;
+		} bits;
+		u8 val;
+	} _0a;
+	union __reg_0b__ {
+		struct __0b {
+			u8 out_sel: 4;
+			u8 kint_l: 4;
+		} bits;
+		u8 val;
+	} _0b;
+	union __reg_0c__ {
+		struct __0c {
+			u8 kstep_h: 8;
+		} bits;
+		u8 val;
+	} _0c;
+	union __reg_0d__ {
+		struct __0d {
+			u8 kstep_m: 8;
+		} bits;
+		u8 val;
+	} _0d;
+	union __reg_0e__ {
+		struct __0e {
+			u8 pll_pu_byp: 1;
+			u8 pll_pu: 1;
+			u8 hsbist_len: 2;
+			u8 stopstate_sel: 1;
+			u8 kstep_l: 3;
+		} bits;
+		u8 val;
+	} _0e;
+	union __reg_0f__ {
+		struct __0f {
+			u8 det_delay:2;
+			u8 kdelta: 4;
+			u8 ldo0p4:2;
+		} bits;
+		u8 val;
+	} _0f;
+};
+
+struct dphy_pll {
+	u8 refin; /* Pre-divider control signal */
+	u8 cp_s; /* 00: SDM_EN=1, 10: SDM_EN=0 */
+	u8 fdk_s; /* PLL mode control: integer or fraction */
+	u8 sdm_en;
+	u8 div;
+	u8 int_n; /* integer N PLL */
+	u32 ref_clk; /* dphy reference clock, unit: MHz */
+	u32 freq; /* panel config, unit: KHz */
+	u32 fvco;
+	u32 potential_fvco;
+	u32 nint; /* sigma delta modulator NINT control */
+	u32 kint; /* sigma delta modulator KINT control */
+	u8 lpf_sel; /* low pass filter control */
+	u8 out_sel; /* post divider control */
+	u8 vco_band; /* vco range */
+	u8 det_delay;
+
+	struct pll_reg reg;
+};
+
+struct dphy_context;
+
+int dphy_pll_config(struct dphy_context *ctx);
+void dphy_timing_config(struct dphy_context *ctx);
+
+#endif /* _MEGACORES_PLL_H_ */
\ No newline at end of file
diff --git a/drivers/gpu/drm/sprd/sprd_dphy.c b/drivers/gpu/drm/sprd/sprd_dphy.c
new file mode 100644
index 0000000..18abe78
--- /dev/null
+++ b/drivers/gpu/drm/sprd/sprd_dphy.c
@@ -0,0 +1,335 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include "sprd_drm.h"
+#include "sprd_dphy.h"
+#include "dw_dsi_ctrl_ppi.h"
+
+int dphy_wait_pll_locked(struct sprd_dphy *dphy)
+{
+	struct dphy_context *ctx = &dphy->ctx;
+	int i;
+
+	for (i = 0; i < 50000; i++) {
+		if (dsi_phy_is_pll_locked(ctx))
+			return 0;
+		udelay(3);
+	}
+
+	DRM_ERROR("error: dphy pll can not be locked\n");
+	return -ETIMEDOUT;
+}
+
+static int dphy_wait_datalane_stop_state(struct dphy_context *ctx, u8 mask)
+{
+	int i;
+
+	for (i = 0; i < 5000; i++) {
+		if (dsi_phy_is_stop_state_datalane(ctx) == mask)
+			return 0;
+		udelay(10);
+	}
+
+	DRM_ERROR("wait datalane stop-state time out\n");
+	return -ETIMEDOUT;
+}
+
+static int dphy_wait_datalane_ulps_active(struct dphy_context *ctx, u8 mask)
+{
+	int i;
+
+	for (i = 0; i < 5000; i++) {
+		if (dsi_phy_is_ulps_active_datalane(ctx) == mask)
+			return 0;
+		udelay(10);
+	}
+
+	DRM_ERROR("wait datalane ulps-active time out\n");
+	return -ETIMEDOUT;
+}
+
+static int dphy_wait_clklane_stop_state(struct dphy_context *ctx)
+{
+	int i;
+
+	for (i = 0; i < 5000; i++) {
+		if (dsi_phy_is_stop_state_clklane(ctx))
+			return 0;
+		udelay(10);
+	}
+
+	DRM_ERROR("wait clklane stop-state time out\n");
+	return -ETIMEDOUT;
+}
+
+static int dphy_wait_clklane_ulps_active(struct dphy_context *ctx)
+{
+	int i;
+
+	for (i = 0; i < 5000; i++) {
+		if (dsi_phy_is_ulps_active_clklane(ctx))
+			return 0;
+		udelay(10);
+	}
+
+	DRM_ERROR("wait clklane ulps-active time out\n");
+	return -ETIMEDOUT;
+}
+
+static int regmap_tst_io_write(void *context, u32 reg, u32 val)
+{
+	struct sprd_dphy *dphy = context;
+	struct dphy_context *ctx = &dphy->ctx;
+
+	if (val > 0xff || reg > 0xff)
+		return -EINVAL;
+
+	DRM_DEBUG("reg = 0x%02x, val = 0x%02x\n", reg, val);
+
+	dsi_phy_test_en(ctx, 1);
+	dsi_phy_test_din(ctx, reg);
+	dsi_phy_test_clk(ctx, 1);
+	dsi_phy_test_clk(ctx, 0);
+	dsi_phy_test_en(ctx, 0);
+	dsi_phy_test_din(ctx, val);
+	dsi_phy_test_clk(ctx, 1);
+	dsi_phy_test_clk(ctx, 0);
+
+	return 0;
+}
+
+static int regmap_tst_io_read(void *context, u32 reg, u32 *val)
+{
+	struct sprd_dphy *dphy = context;
+	struct dphy_context *ctx = &dphy->ctx;
+	int ret;
+
+	if (reg > 0xff)
+		return -EINVAL;
+
+	dsi_phy_test_en(ctx, 1);
+	dsi_phy_test_din(ctx, reg);
+	dsi_phy_test_clk(ctx, 1);
+	dsi_phy_test_clk(ctx, 0);
+	dsi_phy_test_en(ctx, 0);
+
+	udelay(1);
+
+	ret = dsi_phy_test_dout(ctx);
+	if (ret < 0)
+		return ret;
+
+	*val = ret;
+
+	DRM_DEBUG("reg = 0x%02x, val = 0x%02x\n", reg, *val);
+	return 0;
+}
+
+static struct regmap_bus regmap_tst_io = {
+	.reg_write = regmap_tst_io_write,
+	.reg_read = regmap_tst_io_read,
+};
+
+static const struct regmap_config byte_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static const struct regmap_config word_config = {
+	.reg_bits = 32,
+	.val_bits = 32,
+	.reg_stride = 4,
+};
+
+static int sprd_dphy_regmap_init(struct sprd_dphy *dphy)
+{
+	struct dphy_context *ctx = &dphy->ctx;
+	struct regmap *regmap;
+
+	if (ctx->apbbase)
+		regmap = devm_regmap_init_mmio(&dphy->dev,
+			(void __iomem *)ctx->apbbase, &word_config);
+	else
+		regmap = devm_regmap_init(&dphy->dev, &regmap_tst_io,
+					  dphy, &byte_config);
+
+	if (IS_ERR(regmap)) {
+		DRM_ERROR("dphy regmap init failed\n");
+		return PTR_ERR(regmap);
+	}
+
+	ctx->regmap = regmap;
+
+	return 0;
+}
+
+void sprd_dphy_ulps_enter(struct sprd_dphy *dphy)
+{
+	struct dphy_context *ctx = &dphy->ctx;
+	u8 lane_mask = (1 << ctx->lanes) - 1;
+
+	/* phy hs clk disable */
+	dsi_phy_clk_hs_rqst(ctx, false);
+	dphy_wait_pll_locked(dphy);
+
+	/* phy datalane ulps active */
+	dsi_phy_datalane_ulps_rqst(ctx, 1);
+	dphy_wait_datalane_ulps_active(ctx, lane_mask);
+	dsi_phy_datalane_ulps_rqst(ctx, 0);
+
+	/* phy clklane ulps active */
+	dsi_phy_clklane_ulps_rqst(ctx, 1);
+	dphy_wait_clklane_ulps_active(ctx);
+	dsi_phy_clklane_ulps_rqst(ctx, 0);
+}
+
+void sprd_dphy_ulps_exit(struct sprd_dphy *dphy)
+{
+	struct dphy_context *ctx = &dphy->ctx;
+	u8 lane_mask = (1 << ctx->lanes) - 1;
+
+	dsi_phy_force_pll(ctx, true);
+
+	/* phy clklane ulps exit */
+	dsi_phy_clklane_ulps_exit(ctx, 1);
+	dphy_wait_clklane_stop_state(ctx);
+	dsi_phy_clklane_ulps_exit(ctx, 0);
+
+	/* phy datelane ulps exit */
+	dsi_phy_datalane_ulps_exit(ctx, 1);
+	dphy_wait_datalane_stop_state(ctx, lane_mask);
+	dsi_phy_datalane_ulps_exit(ctx, 0);
+
+	dsi_phy_force_pll(ctx, false);
+}
+
+int sprd_dphy_init(struct sprd_dphy *dphy)
+{
+	struct dphy_context *ctx = &dphy->ctx;
+	int ret;
+
+	dsi_phy_rstz(ctx, 0);
+	dsi_phy_shutdownz(ctx, 0);
+	dsi_phy_clklane_en(ctx, 0);
+
+	dsi_phy_test_clr(ctx, 0);
+	dsi_phy_test_clr(ctx, 1);
+	dsi_phy_test_clr(ctx, 0);
+
+	dphy_pll_config(ctx);
+	dphy_timing_config(ctx);
+
+	dsi_phy_shutdownz(ctx, 1);
+	dsi_phy_rstz(ctx, 1);
+	dsi_phy_stop_wait_time(ctx, 0x1C);
+	dsi_phy_clklane_en(ctx, 1);
+	dsi_phy_datalane_en(ctx);
+
+	ret = dphy_wait_pll_locked(dphy);
+	if (ret) {
+		DRM_ERROR("sprd dphy initial failed\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+void sprd_dphy_fini(struct sprd_dphy *dphy)
+{
+	struct dphy_context *ctx = &dphy->ctx;
+
+	dsi_phy_rstz(ctx, 0);
+	dsi_phy_shutdownz(ctx, 0);
+	dsi_phy_rstz(ctx, 1);
+}
+
+static int sprd_dphy_context_init(struct sprd_dphy *dphy,
+				  struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dphy_context *ctx = &dphy->ctx;
+	struct resource *res;
+
+	ctx->pll = devm_kzalloc(dev, sizeof(*ctx->pll), GFP_KERNEL);
+	if (!ctx->pll)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	ctx->ctrlbase = (unsigned long)devm_ioremap(dev, res->start,
+					resource_size(res));
+	if (ctx->ctrlbase == 0) {
+		DRM_ERROR("failed to map dphy ctrl registers\n");
+		return -ENXIO;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (res) {
+		ctx->ctrlbase = (unsigned long)devm_ioremap(dev, res->start,
+					resource_size(res));
+		if (ctx->apbbase == 0) {
+			DRM_INFO("failed to map dphy apb registers\n");
+			return -ENXIO;
+		}
+	}
+
+	return 0;
+}
+
+static const struct of_device_id dphy_match_table[] = {
+	{ .compatible = "sprd,sharkl3-dsi-phy" },
+	{ /* sentinel */ },
+};
+
+static int sprd_dphy_probe(struct platform_device *pdev)
+{
+	struct sprd_dphy *dphy;
+	struct device *dsi_dev;
+	int ret;
+
+	dphy = devm_kzalloc(&pdev->dev, sizeof(*dphy), GFP_KERNEL);
+	if (!dphy)
+		return -ENOMEM;
+
+	dsi_dev = sprd_disp_pipe_get_input(&pdev->dev);
+	if (!dsi_dev)
+		return -ENODEV;
+
+	ret = sprd_dphy_context_init(dphy, &pdev->dev);
+	if (ret)
+		return ret;
+
+	ret = sprd_dphy_regmap_init(dphy);
+	if (ret)
+		return ret;
+
+	platform_set_drvdata(pdev, dphy);
+
+	return 0;
+}
+
+struct platform_driver sprd_dphy_driver = {
+	.probe	= sprd_dphy_probe,
+	.driver = {
+		.name  = "sprd-dphy-drv",
+		.of_match_table	= dphy_match_table,
+	}
+};
+
+MODULE_AUTHOR("Leon He <leon.he@unisoc.com>");
+MODULE_AUTHOR("Kevin Tang <kevin.tang@unisoc.com>");
+MODULE_DESCRIPTION("Unisoc MIPI DSI PHY driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/sprd/sprd_dphy.h b/drivers/gpu/drm/sprd/sprd_dphy.h
new file mode 100644
index 0000000..ae858ba
--- /dev/null
+++ b/drivers/gpu/drm/sprd/sprd_dphy.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#ifndef _SPRD_DPHY_H_
+#define _SPRD_DPHY_H_
+
+#include <asm/types.h>
+#include <linux/device.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#include <drm/drm_print.h>
+
+#include "megacores_pll.h"
+
+struct dphy_context {
+	struct dphy_pll *pll;
+	struct regmap *regmap;
+	unsigned long ctrlbase;
+	unsigned long apbbase;
+	u32 freq;
+	u8 lanes;
+};
+
+struct sprd_dphy {
+	struct device dev;
+	struct dphy_context ctx;
+};
+
+int dphy_wait_pll_locked(struct sprd_dphy *dphy);
+int sprd_dphy_init(struct sprd_dphy *dphy);
+void sprd_dphy_fini(struct sprd_dphy *dphy);
+void sprd_dphy_ulps_enter(struct sprd_dphy *dphy);
+void sprd_dphy_ulps_exit(struct sprd_dphy *dphy);
+
+#endif /* _SPRD_DPHY_H_ */
diff --git a/drivers/gpu/drm/sprd/sprd_dpu.c b/drivers/gpu/drm/sprd/sprd_dpu.c
index f6aa47b..973fb36 100644
--- a/drivers/gpu/drm/sprd/sprd_dpu.c
+++ b/drivers/gpu/drm/sprd/sprd_dpu.c
@@ -322,6 +322,28 @@ static int sprd_crtc_init(struct drm_device *drm, struct drm_crtc *crtc,
 	return 0;
 }
 
+void sprd_dpu_run(struct sprd_dpu *dpu)
+{
+	struct dpu_context *ctx = &dpu->ctx;
+
+	if (dpu->core->run)
+		dpu->core->run(ctx);
+
+	drm_crtc_vblank_on(&dpu->crtc);
+}
+
+void sprd_dpu_stop(struct sprd_dpu *dpu)
+{
+	struct dpu_context *ctx = &dpu->ctx;
+
+	if (dpu->core->stop)
+		dpu->core->stop(ctx);
+
+	drm_crtc_handle_vblank(&dpu->crtc);
+	drm_crtc_vblank_off(&dpu->crtc);
+}
+
+
 static void sprd_dpu_init(struct sprd_dpu *dpu)
 {
 	struct dpu_context *ctx = &dpu->ctx;
diff --git a/drivers/gpu/drm/sprd/sprd_dpu.h b/drivers/gpu/drm/sprd/sprd_dpu.h
index 88f34ed..b6ad155 100644
--- a/drivers/gpu/drm/sprd/sprd_dpu.h
+++ b/drivers/gpu/drm/sprd/sprd_dpu.h
@@ -211,4 +211,7 @@ layer_reg_wr(struct dpu_context *ctx, u32 offset, u32 cfg_bits, int index)
 
 extern const struct dpu_core_ops dpu_r2p0_core_ops;
 
+void sprd_dpu_run(struct sprd_dpu *dpu);
+void sprd_dpu_stop(struct sprd_dpu *dpu);
+
 #endif
diff --git a/drivers/gpu/drm/sprd/sprd_drm.c b/drivers/gpu/drm/sprd/sprd_drm.c
index ca93be2..a57e079 100644
--- a/drivers/gpu/drm/sprd/sprd_drm.c
+++ b/drivers/gpu/drm/sprd/sprd_drm.c
@@ -27,6 +27,46 @@
 #define DRIVER_MAJOR	1
 #define DRIVER_MINOR	0
 
+static struct device *sprd_disp_pipe_get_by_port(struct device *dev, int port)
+{
+	struct device_node *np = dev->of_node;
+	struct device_node *endpoint;
+	struct device_node *remote_node;
+	struct platform_device *remote_pdev;
+
+	endpoint = of_graph_get_endpoint_by_regs(np, port, 0);
+	if (!endpoint) {
+		DRM_ERROR("%s/port%d/endpoint0 was not found\n",
+			  np->full_name, port);
+		return NULL;
+	}
+
+	remote_node = of_graph_get_remote_port_parent(endpoint);
+	if (!remote_node) {
+		DRM_ERROR("device node was not found by endpoint0\n");
+		return NULL;
+	}
+
+	remote_pdev = of_find_device_by_node(remote_node);
+	if (remote_pdev == NULL) {
+		DRM_ERROR("find %s platform device failed\n",
+			  remote_node->full_name);
+		return NULL;
+	}
+
+	return &remote_pdev->dev;
+}
+
+struct device *sprd_disp_pipe_get_input(struct device *dev)
+{
+	return sprd_disp_pipe_get_by_port(dev, 1);
+}
+
+struct device *sprd_disp_pipe_get_output(struct device *dev)
+{
+	return sprd_disp_pipe_get_by_port(dev, 0);
+}
+
 static const struct drm_mode_config_helper_funcs sprd_drm_mode_config_helper = {
 	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
 };
diff --git a/drivers/gpu/drm/sprd/sprd_drm.h b/drivers/gpu/drm/sprd/sprd_drm.h
index 85d4a8b..bfd374c 100644
--- a/drivers/gpu/drm/sprd/sprd_drm.h
+++ b/drivers/gpu/drm/sprd/sprd_drm.h
@@ -13,6 +13,8 @@ struct sprd_drm {
 	struct drm_device drm;
 };
 
+struct device *sprd_disp_pipe_get_input(struct device *dev);
+struct device *sprd_disp_pipe_get_output(struct device *dev);
 extern struct platform_driver sprd_dpu_driver;
 
 #endif /* _SPRD_DRM_H_ */
diff --git a/drivers/gpu/drm/sprd/sprd_dsi.c b/drivers/gpu/drm/sprd/sprd_dsi.c
new file mode 100644
index 0000000..09f6a9b
--- /dev/null
+++ b/drivers/gpu/drm/sprd/sprd_dsi.c
@@ -0,0 +1,1102 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#include <linux/component.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/of_graph.h>
+#include <video/mipi_display.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_of.h>
+#include <drm/drm_probe_helper.h>
+
+#include "sprd_drm.h"
+#include "sprd_dpu.h"
+#include "sprd_dsi.h"
+#include "sprd_dphy.h"
+#include "dw_dsi_ctrl.h"
+#include "dw_dsi_ctrl_ppi.h"
+
+#define encoder_to_dsi(encoder) \
+	container_of(encoder, struct sprd_dsi, encoder)
+#define host_to_dsi(host) \
+	container_of(host, struct sprd_dsi, host)
+#define connector_to_dsi(connector) \
+	container_of(connector, struct sprd_dsi, connector)
+
+static int dsi_wait_tx_payload_fifo_empty(struct dsi_context *ctx)
+{
+	int i;
+
+	for (i = 0; i < 5000; i++) {
+		if (dsi_is_tx_payload_fifo_empty(ctx))
+			return 0;
+		udelay(1);
+	}
+
+	return -ETIMEDOUT;
+}
+
+static int dsi_wait_tx_cmd_fifo_empty(struct dsi_context *ctx)
+{
+	int i;
+
+	for (i = 0; i < 5000; i++) {
+		if (dsi_is_tx_cmd_fifo_empty(ctx))
+			return 0;
+		udelay(1);
+	}
+
+	return -ETIMEDOUT;
+}
+
+static int dsi_wait_rd_resp_completed(struct dsi_context *ctx)
+{
+	int i;
+
+	for (i = 0; i < 10000; i++) {
+		if (dsi_is_bta_returned(ctx))
+			return 0;
+		udelay(10);
+	}
+
+	return -ETIMEDOUT;
+}
+
+static u16 calc_bytes_per_pixel_x100(int coding)
+{
+	u16 Bpp_x100;
+
+	switch (coding) {
+	case COLOR_CODE_16BIT_CONFIG1:
+	case COLOR_CODE_16BIT_CONFIG2:
+	case COLOR_CODE_16BIT_CONFIG3:
+		Bpp_x100 = 200;
+		break;
+	case COLOR_CODE_18BIT_CONFIG1:
+	case COLOR_CODE_18BIT_CONFIG2:
+		Bpp_x100 = 225;
+		break;
+	case COLOR_CODE_24BIT:
+		Bpp_x100 = 300;
+		break;
+	case COLOR_CODE_COMPRESSTION:
+		Bpp_x100 = 100;
+		break;
+	case COLOR_CODE_20BIT_YCC422_LOOSELY:
+		Bpp_x100 = 250;
+		break;
+	case COLOR_CODE_24BIT_YCC422:
+		Bpp_x100 = 300;
+		break;
+	case COLOR_CODE_16BIT_YCC422:
+		Bpp_x100 = 200;
+		break;
+	case COLOR_CODE_30BIT:
+		Bpp_x100 = 375;
+		break;
+	case COLOR_CODE_36BIT:
+		Bpp_x100 = 450;
+		break;
+	case COLOR_CODE_12BIT_YCC420:
+		Bpp_x100 = 150;
+		break;
+	default:
+		DRM_ERROR("invalid color coding");
+		Bpp_x100 = 0;
+		break;
+	}
+
+	return Bpp_x100;
+}
+
+static u8 calc_video_size_step(int coding)
+{
+	u8 video_size_step;
+
+	switch (coding) {
+	case COLOR_CODE_16BIT_CONFIG1:
+	case COLOR_CODE_16BIT_CONFIG2:
+	case COLOR_CODE_16BIT_CONFIG3:
+	case COLOR_CODE_18BIT_CONFIG1:
+	case COLOR_CODE_18BIT_CONFIG2:
+	case COLOR_CODE_24BIT:
+	case COLOR_CODE_COMPRESSTION:
+		return video_size_step = 1;
+	case COLOR_CODE_20BIT_YCC422_LOOSELY:
+	case COLOR_CODE_24BIT_YCC422:
+	case COLOR_CODE_16BIT_YCC422:
+	case COLOR_CODE_30BIT:
+	case COLOR_CODE_36BIT:
+	case COLOR_CODE_12BIT_YCC420:
+		return video_size_step = 2;
+	default:
+		DRM_ERROR("invalid color coding");
+		return 0;
+	}
+}
+
+static u16 round_video_size(int coding, u16 video_size)
+{
+	switch (coding) {
+	case COLOR_CODE_16BIT_YCC422:
+	case COLOR_CODE_24BIT_YCC422:
+	case COLOR_CODE_20BIT_YCC422_LOOSELY:
+	case COLOR_CODE_12BIT_YCC420:
+		/* round up active H pixels to a multiple of 2 */
+		if ((video_size % 2) != 0)
+			video_size += 1;
+		break;
+	default:
+		break;
+	}
+
+	return video_size;
+}
+
+#define SPRD_MIPI_DSI_FMT_DSC 0xff
+static u32 fmt_to_coding(u32 fmt)
+{
+	switch (fmt) {
+	case MIPI_DSI_FMT_RGB565:
+		return COLOR_CODE_16BIT_CONFIG1;
+	case MIPI_DSI_FMT_RGB666:
+	case MIPI_DSI_FMT_RGB666_PACKED:
+		return COLOR_CODE_18BIT_CONFIG1;
+	case MIPI_DSI_FMT_RGB888:
+		return COLOR_CODE_24BIT;
+	case SPRD_MIPI_DSI_FMT_DSC:
+		return COLOR_CODE_COMPRESSTION;
+	default:
+		DRM_ERROR("Unsupported format (%d)\n", fmt);
+		return COLOR_CODE_24BIT;
+	}
+}
+
+#define ns_to_cycle(ns, byte_clk) \
+	DIV_ROUND_UP((ns) * (byte_clk), 1000000)
+
+void sprd_dsi_init(struct sprd_dsi *dsi)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+	u16 data_hs2lp, data_lp2hs, clk_hs2lp, clk_lp2hs;
+	u16 max_rd_time;
+	int div;
+
+	dsi_power_enable(ctx, 0);
+	dsi_int0_mask(ctx, 0xffffffff);
+	dsi_int1_mask(ctx, 0xffffffff);
+	dsi_cmd_mode(ctx);
+	dsi_eotp_rx_en(ctx, 0);
+	dsi_eotp_tx_en(ctx, 0);
+	dsi_ecc_rx_en(ctx, 1);
+	dsi_crc_rx_en(ctx, 1);
+	dsi_bta_en(ctx, 1);
+	dsi_video_vcid(ctx, 0);
+	dsi_rx_vcid(ctx, 0);
+
+	div = DIV_ROUND_UP(ctx->byte_clk, ctx->esc_clk);
+	dsi_tx_escape_division(ctx, div);
+
+	max_rd_time = ns_to_cycle(ctx->max_rd_time, ctx->byte_clk);
+	dsi_max_read_time(ctx, max_rd_time);
+
+	data_hs2lp = ns_to_cycle(ctx->data_hs2lp, ctx->byte_clk);
+	data_lp2hs = ns_to_cycle(ctx->data_lp2hs, ctx->byte_clk);
+	clk_hs2lp = ns_to_cycle(ctx->clk_hs2lp, ctx->byte_clk);
+	clk_lp2hs = ns_to_cycle(ctx->clk_lp2hs, ctx->byte_clk);
+	dsi_datalane_hs2lp_config(ctx, data_hs2lp);
+	dsi_datalane_lp2hs_config(ctx, data_lp2hs);
+	dsi_clklane_hs2lp_config(ctx, clk_hs2lp);
+	dsi_clklane_lp2hs_config(ctx, clk_lp2hs);
+
+	dsi_power_enable(ctx, 1);
+}
+
+/*
+ * Free up resources and shutdown host controller and PHY
+ */
+void sprd_dsi_fini(struct sprd_dsi *dsi)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+
+	dsi_int0_mask(ctx, 0xffffffff);
+	dsi_int1_mask(ctx, 0xffffffff);
+	dsi_power_enable(ctx, 0);
+}
+
+/*
+ * If not in burst mode, it will compute the video and null packet sizes
+ * according to necessity.
+ * Configure timers for data lanes and/or clock lane to return to LP when
+ * bandwidth is not filled by data.
+ */
+int sprd_dsi_dpi_video(struct sprd_dsi *dsi)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+	struct videomode *vm = &dsi->ctx.vm;
+	u16 Bpp_x100;
+	u16 video_size;
+	u32 ratio_x1000;
+	u16 null_pkt_size = 0;
+	u8 video_size_step;
+	u32 hs_to;
+	u32 total_bytes;
+	u32 bytes_per_chunk;
+	u32 chunks = 0;
+	u32 bytes_left = 0;
+	u32 chunk_overhead;
+	const u8 pkt_header = 6;
+	u8 coding;
+	int div;
+	u16 hline;
+
+	coding = fmt_to_coding(ctx->format);
+	video_size = round_video_size(coding, vm->hactive);
+	Bpp_x100 = calc_bytes_per_pixel_x100(coding);
+	video_size_step = calc_video_size_step(coding);
+	ratio_x1000 = ctx->byte_clk * 1000 / (vm->pixelclock / 1000);
+	hline = vm->hactive + vm->hsync_len + vm->hfront_porch +
+		vm->hback_porch;
+
+	dsi_power_enable(ctx, 0);
+	dsi_dpi_frame_ack_en(ctx, ctx->frame_ack_en);
+	dsi_dpi_color_coding(ctx, coding);
+	dsi_dpi_video_burst_mode(ctx, ctx->burst_mode);
+	dsi_dpi_sig_delay(ctx, 95 * hline * ratio_x1000 / 100000);
+	dsi_dpi_hline_time(ctx, hline * ratio_x1000 / 1000);
+	dsi_dpi_hsync_time(ctx, vm->hsync_len * ratio_x1000 / 1000);
+	dsi_dpi_hbp_time(ctx, vm->hback_porch * ratio_x1000 / 1000);
+	dsi_dpi_vact(ctx, vm->vactive);
+	dsi_dpi_vfp(ctx, vm->vfront_porch);
+	dsi_dpi_vbp(ctx, vm->vback_porch);
+	dsi_dpi_vsync(ctx, vm->vsync_len);
+	dsi_dpi_hporch_lp_en(ctx, 1);
+	dsi_dpi_vporch_lp_en(ctx, 1);
+
+	hs_to = (hline * vm->vactive) + (2 * Bpp_x100) / 100;
+	for (div = 0x80; (div < hs_to) && (div > 2); div--) {
+		if ((hs_to % div) == 0) {
+			dsi_timeout_clock_division(ctx, div);
+			dsi_lp_rx_timeout(ctx, hs_to / div);
+			dsi_hs_tx_timeout(ctx, hs_to / div);
+			break;
+		}
+	}
+
+	if (ctx->burst_mode == VIDEO_BURST_WITH_SYNC_PULSES) {
+		dsi_dpi_video_packet_size(ctx, video_size);
+		dsi_dpi_null_packet_size(ctx, 0);
+		dsi_dpi_chunk_num(ctx, 0);
+	} else {
+		/* non burst transmission */
+		null_pkt_size = 0;
+
+		/* bytes to be sent - first as one chunk */
+		bytes_per_chunk = vm->hactive * Bpp_x100 / 100 + pkt_header;
+
+		/* hline total bytes from the DPI interface */
+		total_bytes = (vm->hactive + vm->hfront_porch) *
+				ratio_x1000 / ctx->lanes / 1000;
+
+		/* check if the pixels actually fit on the DSI link */
+		if (total_bytes < bytes_per_chunk) {
+			DRM_ERROR("current resolution can not be set\n");
+			return -EINVAL;
+		}
+
+		chunk_overhead = total_bytes - bytes_per_chunk;
+
+		/* overhead higher than 1 -> enable multi packets */
+		if (chunk_overhead > 1) {
+
+			/* multi packets */
+			for (video_size = video_size_step;
+			     video_size < vm->hactive;
+			     video_size += video_size_step) {
+
+				if (vm->hactive * 1000 / video_size % 1000)
+					continue;
+
+				chunks = vm->hactive / video_size;
+				bytes_per_chunk = Bpp_x100 * video_size / 100
+						  + pkt_header;
+				if (total_bytes >= (bytes_per_chunk * chunks)) {
+					bytes_left = total_bytes -
+						     bytes_per_chunk * chunks;
+					break;
+				}
+			}
+
+			/* prevent overflow (unsigned - unsigned) */
+			if (bytes_left > (pkt_header * chunks)) {
+				null_pkt_size = (bytes_left -
+						pkt_header * chunks) / chunks;
+				/* avoid register overflow */
+				if (null_pkt_size > 1023)
+					null_pkt_size = 1023;
+			}
+
+		} else {
+
+			/* single packet */
+			chunks = 1;
+
+			/* must be a multiple of 4 except 18 loosely */
+			for (video_size = vm->hactive;
+			    (video_size % video_size_step) != 0;
+			     video_size++)
+				;
+		}
+
+		dsi_dpi_video_packet_size(ctx, video_size);
+		dsi_dpi_null_packet_size(ctx, null_pkt_size);
+		dsi_dpi_chunk_num(ctx, chunks);
+	}
+
+	dsi_int0_mask(ctx, ctx->int0_mask);
+	dsi_int1_mask(ctx, ctx->int1_mask);
+	dsi_power_enable(ctx, 1);
+
+	return 0;
+}
+
+void sprd_dsi_edpi_video(struct sprd_dsi *dsi)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+	const u32 fifo_depth = 1096;
+	const u32 word_length = 4;
+	u32 hactive = ctx->vm.hactive;
+	u32 Bpp_x100;
+	u32 max_fifo_len;
+	u8 coding;
+
+	coding = fmt_to_coding(ctx->format);
+	Bpp_x100 = calc_bytes_per_pixel_x100(coding);
+	max_fifo_len = word_length * fifo_depth * 100 / Bpp_x100;
+
+	dsi_power_enable(ctx, 0);
+	dsi_dpi_color_coding(ctx, coding);
+	dsi_tear_effect_ack_en(ctx, ctx->te_ack_en);
+
+	if (max_fifo_len > hactive)
+		dsi_edpi_max_pkt_size(ctx, hactive);
+	else
+		dsi_edpi_max_pkt_size(ctx, max_fifo_len);
+
+	dsi_int0_mask(ctx, ctx->int0_mask);
+	dsi_int1_mask(ctx, ctx->int1_mask);
+	dsi_power_enable(ctx, 1);
+}
+
+/*
+ * Send a packet on the generic interface,
+ * this function has an active delay to wait for the buffer to clear.
+ * The delay is limited to:
+ * (param_length / 4) x DSIH_FIFO_ACTIVE_WAIT x register access time
+ * the controller restricts the sending of.
+ * 
+ * This function will not be able to send Null and Blanking packets due to
+ * controller restriction
+ */
+int sprd_dsi_wr_pkt(struct sprd_dsi *dsi, u8 vc, u8 type,
+			const u8 *param, u16 len)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+	u8 wc_lsbyte, wc_msbyte;
+	u32 payload;
+	int i, j, ret;
+
+	if (vc > 3)
+		return -EINVAL;
+
+
+	/* 1st: for long packet, must config payload first */
+	ret = dsi_wait_tx_payload_fifo_empty(ctx);
+	if (ret) {
+		DRM_ERROR("tx payload fifo is not empty\n");
+		return ret;
+	}
+
+	if (len > 2) {
+		for (i = 0, j = 0; i < len; i += j) {
+			payload = 0;
+			for (j = 0; (j < 4) && ((j + i) < (len)); j++)
+				payload |= param[i + j] << (j * 8);
+
+			dsi_set_packet_payload(ctx, payload);
+		}
+		wc_lsbyte = len & 0xff;
+		wc_msbyte = len >> 8;
+	} else {
+		wc_lsbyte = (len > 0) ? param[0] : 0;
+		wc_msbyte = (len > 1) ? param[1] : 0;
+	}
+
+	/* 2nd: then set packet header */
+	ret = dsi_wait_tx_cmd_fifo_empty(ctx);
+	if (ret) {
+		DRM_ERROR("tx cmd fifo is not empty\n");
+		return ret;
+	}
+
+	dsi_set_packet_header(ctx, vc, type, wc_lsbyte, wc_msbyte);
+
+	return 0;
+}
+
+/*
+ * Send READ packet to peripheral using the generic interface,
+ * this will force command mode and stop video mode (because of BTA).
+ * 
+ * This function has an active delay to wait for the buffer to clear,
+ * the delay is limited to 2 x DSIH_FIFO_ACTIVE_WAIT
+ * (waiting for command buffer, and waiting for receiving)
+ * @note this function will enable BTA
+ */
+int sprd_dsi_rd_pkt(struct sprd_dsi *dsi, u8 vc, u8 type,
+			u8 msb_byte, u8 lsb_byte,
+			u8 *buffer, u8 bytes_to_read)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+	int i, ret;
+	int count = 0;
+	u32 temp;
+
+	if (vc > 3)
+		return -EINVAL;
+
+	/* 1st: send read command to peripheral */
+	if (!dsi_is_tx_cmd_fifo_empty(ctx))
+		return -EIO;
+
+	dsi_set_packet_header(ctx, vc, type, lsb_byte, msb_byte);
+
+	/* 2nd: wait peripheral response completed */
+	ret = dsi_wait_rd_resp_completed(ctx);
+	if (ret) {
+		DRM_ERROR("wait read response time out\n");
+		return ret;
+	}
+
+	/* 3rd: get data from rx payload fifo */
+	if (dsi_is_rx_payload_fifo_empty(ctx)) {
+		DRM_ERROR("rx payload fifo empty\n");
+		return -EIO;
+	}
+
+	for (i = 0; i < 100; i++) {
+		temp = dsi_get_rx_payload(ctx);
+
+		if (count < bytes_to_read)
+			buffer[count++] = temp & 0xff;
+		if (count < bytes_to_read)
+			buffer[count++] = (temp >> 8) & 0xff;
+		if (count < bytes_to_read)
+			buffer[count++] = (temp >> 16) & 0xff;
+		if (count < bytes_to_read)
+			buffer[count++] = (temp >> 24) & 0xff;
+
+		if (dsi_is_rx_payload_fifo_empty(ctx))
+			return count;
+		else {
+			DRM_ERROR("read too many buffers\n");
+			return -EIO;
+		}
+	}
+
+	return 0;
+}
+
+void sprd_dsi_set_work_mode(struct sprd_dsi *dsi, u8 mode)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+
+	if (mode == DSI_MODE_CMD)
+		dsi_cmd_mode(ctx);
+	else
+		dsi_video_mode(ctx);
+}
+
+int sprd_dsi_get_work_mode(struct sprd_dsi *dsi)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+
+	if (dsi_is_cmd_mode(ctx))
+		return DSI_MODE_CMD;
+	else
+		return DSI_MODE_VIDEO;
+}
+
+void sprd_dsi_lp_cmd_enable(struct sprd_dsi *dsi, bool enable)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+
+	if (dsi_is_cmd_mode(ctx))
+		dsi_cmd_mode_lp_cmd_en(ctx, enable);
+	else
+		dsi_video_mode_lp_cmd_en(ctx, enable);
+}
+
+void sprd_dsi_state_reset(struct sprd_dsi *dsi)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+
+	dsi_power_enable(ctx, 0);
+	udelay(100);
+	dsi_power_enable(ctx, 1);
+}
+
+u32 sprd_dsi_int_status(struct sprd_dsi *dsi, int index)
+{
+	struct dsi_context *ctx = &dsi->ctx;
+	u32 status;
+
+	if (0 == index)
+		status = dsi_int0_status(ctx);
+	else if (1 == index)
+		status = dsi_int1_status(ctx);
+	else {
+		DRM_ERROR("invalid dsi IRQ index %d\n", index);
+		status = -EINVAL;
+	}
+
+	return status;
+}
+
+static void sprd_dsi_encoder_enable(struct drm_encoder *encoder)
+{
+	struct sprd_dsi *dsi = encoder_to_dsi(encoder);
+	struct sprd_dpu *dpu = crtc_to_dpu(encoder->crtc);
+
+	if (dsi->ctx.enabled) {
+		DRM_ERROR("dsi is initialized\n");
+		return;
+	}
+
+	sprd_dsi_init(dsi);
+	if (dsi->ctx.work_mode == DSI_MODE_VIDEO)
+		sprd_dsi_dpi_video(dsi);
+	else
+		sprd_dsi_edpi_video(dsi);
+
+	sprd_dphy_init(dsi->phy);
+
+	sprd_dsi_lp_cmd_enable(dsi, true);
+
+	if (dsi->panel) {
+		drm_panel_prepare(dsi->panel);
+		drm_panel_enable(dsi->panel);
+	}
+
+	sprd_dsi_set_work_mode(dsi, dsi->ctx.work_mode);
+	sprd_dsi_state_reset(dsi);
+
+	if (dsi->ctx.nc_clk_en)
+		dsi_nc_clk_en(&dsi->ctx, true);
+	else {
+		dsi_phy_clk_hs_rqst(&dsi->phy->ctx, true);
+		dphy_wait_pll_locked(dsi->phy);
+	}
+
+	sprd_dpu_run(dpu);
+
+	dsi->ctx.enabled = true;
+}
+
+static void sprd_dsi_encoder_disable(struct drm_encoder *encoder)
+{
+	struct sprd_dsi *dsi = encoder_to_dsi(encoder);
+	struct sprd_dpu *dpu = crtc_to_dpu(encoder->crtc);
+
+	if (!dsi->ctx.enabled) {
+		DRM_ERROR("dsi isn't initialized\n");
+		return;
+	}
+
+	sprd_dpu_stop(dpu);
+	sprd_dsi_set_work_mode(dsi, DSI_MODE_CMD);
+	sprd_dsi_lp_cmd_enable(dsi, true);
+
+	if (dsi->panel) {
+		drm_panel_disable(dsi->panel);
+		sprd_dphy_ulps_enter(dsi->phy);
+		drm_panel_unprepare(dsi->panel);
+	}
+
+	sprd_dphy_fini(dsi->phy);
+	sprd_dsi_fini(dsi);
+
+	dsi->ctx.enabled = false;
+}
+
+static void sprd_dsi_encoder_mode_set(struct drm_encoder *encoder,
+				 struct drm_display_mode *mode,
+				 struct drm_display_mode *adj_mode)
+{
+	struct sprd_dsi *dsi = encoder_to_dsi(encoder);
+
+	DRM_DEBUG("%s() set mode: %s\n", __func__, dsi->mode->name);
+}
+
+static int sprd_dsi_encoder_atomic_check(struct drm_encoder *encoder,
+				    struct drm_crtc_state *crtc_state,
+				    struct drm_connector_state *conn_state)
+{
+	return 0;
+}
+
+static const struct drm_encoder_helper_funcs sprd_encoder_helper_funcs = {
+	.atomic_check	= sprd_dsi_encoder_atomic_check,
+	.mode_set	= sprd_dsi_encoder_mode_set,
+	.enable		= sprd_dsi_encoder_enable,
+	.disable	= sprd_dsi_encoder_disable
+};
+
+static const struct drm_encoder_funcs sprd_encoder_funcs = {
+	.destroy = drm_encoder_cleanup,
+};
+
+static int sprd_dsi_encoder_init(struct drm_device *drm,
+			       struct sprd_dsi *dsi)
+{
+	struct drm_encoder *encoder = &dsi->encoder;
+	struct device *dev = dsi->host.dev;
+	u32 crtc_mask;
+	int ret;
+
+	crtc_mask = drm_of_find_possible_crtcs(drm, dev->of_node);
+	if (!crtc_mask) {
+		DRM_ERROR("failed to find crtc mask\n");
+		return -EINVAL;
+	}
+
+	DRM_DEBUG("find possible crtcs: 0x%08x\n", crtc_mask);
+
+	encoder->possible_crtcs = crtc_mask;
+	ret = drm_encoder_init(drm, encoder, &sprd_encoder_funcs,
+			       DRM_MODE_ENCODER_DSI, NULL);
+	if (ret) {
+		DRM_ERROR("failed to init dsi encoder\n");
+		return ret;
+	}
+
+	drm_encoder_helper_add(encoder, &sprd_encoder_helper_funcs);
+
+	return 0;
+}
+
+static int sprd_dsi_find_panel(struct sprd_dsi *dsi)
+{
+	struct device *dev = dsi->host.dev;
+	struct device_node *child, *lcds_node;
+	struct drm_panel *panel;
+
+	/* search /lcds child node first */
+	lcds_node = of_find_node_by_path("/lcds");
+	for_each_child_of_node(lcds_node, child) {
+		panel = of_drm_find_panel(child);
+		if (panel) {
+			dsi->panel = panel;
+			return 0;
+		}
+	}
+
+	/*
+	 * If /lcds child node search failed, we search
+	 * the child of dsi host node.
+	 */
+	for_each_child_of_node(dev->of_node, child) {
+		panel = of_drm_find_panel(child);
+		if (panel) {
+			dsi->panel = panel;
+			return 0;
+		}
+	}
+
+	DRM_ERROR("of_drm_find_panel() failed\n");
+	return -ENODEV;
+}
+
+static int sprd_dsi_phy_attach(struct sprd_dsi *dsi)
+{
+	struct device *dev;
+
+	dev = sprd_disp_pipe_get_output(&dsi->dev);
+	if (!dev)
+		return -ENODEV;
+
+	dsi->phy = dev_get_drvdata(dev);
+	if (!dsi->phy) {
+		DRM_ERROR("dsi attach phy failed\n");
+		return -EINVAL;
+	}
+
+	dsi->phy->ctx.lanes = dsi->ctx.lanes;
+	dsi->phy->ctx.freq = dsi->ctx.byte_clk * 8;
+
+	return 0;
+}
+
+static int sprd_dsi_host_attach(struct mipi_dsi_host *host,
+			   struct mipi_dsi_device *slave)
+{
+	struct sprd_dsi *dsi = host_to_dsi(host);
+	struct dsi_context *ctx = &dsi->ctx;
+	int ret;
+
+	dsi->slave = slave;
+	ctx->lanes = slave->lanes;
+	ctx->format = slave->format;
+	ctx->byte_clk = slave->hs_rate / 8;
+	ctx->esc_clk = slave->lp_rate;
+
+	if (slave->mode_flags & MIPI_DSI_MODE_VIDEO)
+		ctx->work_mode = DSI_MODE_VIDEO;
+	else
+		ctx->work_mode = DSI_MODE_CMD;
+
+	if (slave->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
+		ctx->burst_mode = VIDEO_BURST_WITH_SYNC_PULSES;
+	else if (slave->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+		ctx->burst_mode = VIDEO_NON_BURST_WITH_SYNC_PULSES;
+	else
+		ctx->burst_mode = VIDEO_NON_BURST_WITH_SYNC_EVENTS;
+
+	if (slave->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)
+		ctx->nc_clk_en = true;
+
+	ret = sprd_dsi_phy_attach(dsi);
+	if (ret)
+		return ret;
+
+	ret = sprd_dsi_find_panel(dsi);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int sprd_dsi_host_detach(struct mipi_dsi_host *host,
+			   struct mipi_dsi_device *slave)
+{
+	/* do nothing */
+	return 0;
+}
+
+static ssize_t sprd_dsi_host_transfer(struct mipi_dsi_host *host,
+				const struct mipi_dsi_msg *msg)
+{
+	struct sprd_dsi *dsi = host_to_dsi(host);
+	const u8 *tx_buf = msg->tx_buf;
+
+	if (msg->rx_buf && msg->rx_len) {
+		u8 lsb = (msg->tx_len > 0) ? tx_buf[0] : 0;
+		u8 msb = (msg->tx_len > 1) ? tx_buf[1] : 0;
+
+		return sprd_dsi_rd_pkt(dsi, msg->channel, msg->type,
+				msb, lsb, msg->rx_buf, msg->rx_len);
+	}
+
+	if (msg->tx_buf && msg->tx_len)
+		return sprd_dsi_wr_pkt(dsi, msg->channel, msg->type,
+					tx_buf, msg->tx_len);
+
+	return 0;
+}
+
+static const struct mipi_dsi_host_ops sprd_dsi_host_ops = {
+	.attach = sprd_dsi_host_attach,
+	.detach = sprd_dsi_host_detach,
+	.transfer = sprd_dsi_host_transfer,
+};
+
+static int sprd_dsi_host_init(struct sprd_dsi *dsi, struct device *dev)
+{
+	int ret;
+
+	dsi->host.dev = dev;
+	dsi->host.ops = &sprd_dsi_host_ops;
+
+	ret = mipi_dsi_host_register(&dsi->host);
+	if (ret)
+		DRM_ERROR("failed to register dsi host\n");
+
+	return ret;
+}
+
+static int sprd_dsi_connector_get_modes(struct drm_connector *connector)
+{
+	struct sprd_dsi *dsi = connector_to_dsi(connector);
+
+	return drm_panel_get_modes(dsi->panel, connector);
+}
+
+static enum drm_mode_status
+sprd_dsi_connector_mode_valid(struct drm_connector *connector,
+			 struct drm_display_mode *mode)
+{
+	struct sprd_dsi *dsi = connector_to_dsi(connector);
+
+	DRM_DEBUG("%s() mode: "DRM_MODE_FMT"\n", __func__, DRM_MODE_ARG(mode));
+
+	if (mode->type & DRM_MODE_TYPE_PREFERRED) {
+		dsi->mode = mode;
+		drm_display_mode_to_videomode(dsi->mode, &dsi->ctx.vm);
+	}
+
+	return MODE_OK;
+}
+
+static struct drm_encoder *
+sprd_dsi_connector_best_encoder(struct drm_connector *connector)
+{
+	struct sprd_dsi *dsi = connector_to_dsi(connector);
+
+	return &dsi->encoder;
+}
+
+static struct drm_connector_helper_funcs sprd_dsi_connector_helper_funcs = {
+	.get_modes = sprd_dsi_connector_get_modes,
+	.mode_valid = sprd_dsi_connector_mode_valid,
+	.best_encoder = sprd_dsi_connector_best_encoder,
+};
+
+static enum drm_connector_status
+sprd_dsi_connector_detect(struct drm_connector *connector, bool force)
+{
+	struct sprd_dsi *dsi = connector_to_dsi(connector);
+
+	if (dsi->panel) {
+		drm_panel_attach(dsi->panel, connector);
+		return connector_status_connected;
+	}
+
+	return connector_status_disconnected;
+}
+
+static void sprd_dsi_connector_destroy(struct drm_connector *connector)
+{
+	drm_connector_unregister(connector);
+	drm_connector_cleanup(connector);
+}
+
+static const struct drm_connector_funcs sprd_dsi_atomic_connector_funcs = {
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.detect = sprd_dsi_connector_detect,
+	.destroy = sprd_dsi_connector_destroy,
+	.reset = drm_atomic_helper_connector_reset,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int sprd_dsi_connector_init(struct drm_device *drm, struct sprd_dsi *dsi)
+{
+	struct drm_encoder *encoder = &dsi->encoder;
+	struct drm_connector *connector = &dsi->connector;
+	int ret;
+
+	connector->polled = DRM_CONNECTOR_POLL_HPD;
+
+	ret = drm_connector_init(drm, connector,
+				 &sprd_dsi_atomic_connector_funcs,
+				 DRM_MODE_CONNECTOR_DSI);
+	if (ret) {
+		DRM_ERROR("drm_connector_init() failed\n");
+		return ret;
+	}
+
+	drm_connector_helper_add(connector,
+				 &sprd_dsi_connector_helper_funcs);
+
+	drm_connector_attach_encoder(connector, encoder);
+
+	return 0;
+}
+
+static int sprd_dsi_bridge_attach(struct sprd_dsi *dsi)
+{
+	struct drm_encoder *encoder = &dsi->encoder;
+	struct drm_bridge *bridge = dsi->bridge;
+	struct device *dev = dsi->host.dev;
+	struct device_node *bridge_node;
+	int ret;
+
+	bridge_node = of_graph_get_remote_node(dev->of_node, 2, 0);
+	if (!bridge_node)
+		return 0;
+
+	bridge = of_drm_find_bridge(bridge_node);
+	if (!bridge) {
+		DRM_ERROR("of_drm_find_bridge() failed\n");
+		return -ENODEV;
+	}
+	dsi->bridge = bridge;
+
+	ret = drm_bridge_attach(encoder, bridge, NULL, 0);
+	if (ret) {
+		DRM_ERROR("failed to attach external bridge\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static irqreturn_t sprd_dsi_isr(int irq, void *data)
+{
+	u32 status = 0;
+	struct sprd_dsi *dsi = data;
+
+	if (dsi->ctx.irq0 == irq)
+		status = sprd_dsi_int_status(dsi, 0);
+	else if (dsi->ctx.irq1 == irq)
+		status = sprd_dsi_int_status(dsi, 1);
+
+	if (status & DSI_INT_STS_NEED_SOFT_RESET)
+		sprd_dsi_state_reset(dsi);
+
+	return IRQ_HANDLED;
+}
+
+static int sprd_dsi_bind(struct device *dev, struct device *master, void *data)
+{
+	struct drm_device *drm = data;
+	struct sprd_dsi *dsi = dev_get_drvdata(dev);
+	int ret;
+
+	ret = sprd_dsi_encoder_init(drm, dsi);
+	if (ret)
+		goto cleanup_host;
+
+	ret = sprd_dsi_connector_init(drm, dsi);
+	if (ret)
+		goto cleanup_encoder;
+
+	ret = sprd_dsi_bridge_attach(dsi);
+	if (ret)
+		goto cleanup_connector;
+
+	return 0;
+
+cleanup_connector:
+	drm_connector_cleanup(&dsi->connector);
+cleanup_encoder:
+	drm_encoder_cleanup(&dsi->encoder);
+cleanup_host:
+	mipi_dsi_host_unregister(&dsi->host);
+	return ret;
+}
+
+static void sprd_dsi_unbind(struct device *dev,
+			struct device *master, void *data)
+{
+	/* do nothing */
+	DRM_DEBUG("%s()\n", __func__);
+
+}
+
+static const struct component_ops dsi_component_ops = {
+	.bind	= sprd_dsi_bind,
+	.unbind	= sprd_dsi_unbind,
+};
+
+static int sprd_dsi_context_init(struct sprd_dsi *dsi,
+			struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dsi_context *ctx = &dsi->ctx;
+	struct resource *res;
+	int ret;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	ctx->base = (unsigned long)devm_ioremap(dev, res->start,
+					resource_size(res));
+	if (ctx->base == 0) {
+		DRM_ERROR("failed to map dsi host registers\n");
+		return -ENXIO;
+	}
+
+	ctx->irq0 = platform_get_irq(pdev, 0);
+	if (ctx->irq0 > 0) {
+		ret = request_irq(ctx->irq0, sprd_dsi_isr, 0, "DSI_INT0", dsi);
+		if (ret) {
+			DRM_ERROR("failed to request dsi irq int0!\n");
+			return -EINVAL;
+		}
+	}
+
+	ctx->irq1 = platform_get_irq(pdev, 1);
+	if (ctx->irq1 > 0) {
+		ret = request_irq(ctx->irq1, sprd_dsi_isr, 0, "DSI_INT1", dsi);
+		if (ret) {
+			DRM_ERROR("failed to request dsi irq int1!\n");
+			return -EINVAL;
+		}
+	}
+
+	ctx->data_hs2lp = 120;
+	ctx->data_lp2hs = 500;
+	ctx->clk_hs2lp = 4;
+	ctx->clk_lp2hs = 15;
+	ctx->max_rd_time = 6000;
+	ctx->int0_mask = 0xffffffff;
+	ctx->int1_mask = 0xffffffff;
+
+	return 0;
+}
+
+static const struct of_device_id dsi_match_table[] = {
+	{ .compatible = "sprd,sharkl3-dsi-host" },
+	{ /* sentinel */ },
+};
+
+static int sprd_dsi_probe(struct platform_device *pdev)
+{
+	struct sprd_dsi *dsi;
+	int ret;
+
+	dsi = devm_kzalloc(&pdev->dev, sizeof(*dsi), GFP_KERNEL);
+	if (!dsi) {
+		DRM_ERROR("failed to allocate dsi data.\n");
+		return -ENOMEM;
+	}
+
+	ret = sprd_dsi_context_init(dsi, &pdev->dev);
+	if (ret)
+		return ret;
+
+	ret = sprd_dsi_host_init(dsi, &pdev->dev);
+	if (ret)
+		return ret;
+	
+	platform_set_drvdata(pdev, dsi);
+
+	return component_add(&pdev->dev, &dsi_component_ops);
+}
+
+static int sprd_dsi_remove(struct platform_device *pdev)
+{
+	component_del(&pdev->dev, &dsi_component_ops);
+
+	return 0;
+}
+
+struct platform_driver sprd_dsi_driver = {
+	.probe = sprd_dsi_probe,
+	.remove = sprd_dsi_remove,
+	.driver = {
+		.name = "sprd-dsi-drv",
+		.of_match_table = dsi_match_table,
+	},
+};
+
+MODULE_AUTHOR("Leon He <leon.he@unisoc.com>");
+MODULE_AUTHOR("Kevin Tang <kevin.tang@unisoc.com>");
+MODULE_DESCRIPTION("Unisoc MIPI DSI HOST Controller Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/sprd/sprd_dsi.h b/drivers/gpu/drm/sprd/sprd_dsi.h
new file mode 100644
index 0000000..ce9ff03
--- /dev/null
+++ b/drivers/gpu/drm/sprd/sprd_dsi.h
@@ -0,0 +1,105 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Unisoc Inc.
+ */
+
+#ifndef __SPRD_DSI_H__
+#define __SPRD_DSI_H__
+
+#include <linux/of.h>
+#include <linux/device.h>
+#include <video/videomode.h>
+
+#include <drm/drm_bridge.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_print.h>
+#include <drm/drm_panel.h>
+
+#define DSI_INT_STS_NEED_SOFT_RESET	BIT(0)
+#define DSI_INT_STS_NEED_HARD_RESET	BIT(1)
+
+enum dsi_work_mode {
+	DSI_MODE_CMD = 0,
+	DSI_MODE_VIDEO
+};
+
+enum video_burst_mode {
+	VIDEO_NON_BURST_WITH_SYNC_PULSES = 0,
+	VIDEO_NON_BURST_WITH_SYNC_EVENTS,
+	VIDEO_BURST_WITH_SYNC_PULSES
+};
+
+enum dsi_color_coding {
+	COLOR_CODE_16BIT_CONFIG1 = 0,
+	COLOR_CODE_16BIT_CONFIG2,
+	COLOR_CODE_16BIT_CONFIG3,
+	COLOR_CODE_18BIT_CONFIG1,
+	COLOR_CODE_18BIT_CONFIG2,
+	COLOR_CODE_24BIT,
+	COLOR_CODE_20BIT_YCC422_LOOSELY,
+	COLOR_CODE_24BIT_YCC422,
+	COLOR_CODE_16BIT_YCC422,
+	COLOR_CODE_30BIT,
+	COLOR_CODE_36BIT,
+	COLOR_CODE_12BIT_YCC420,
+	COLOR_CODE_COMPRESSTION,
+	COLOR_CODE_MAX
+};
+
+struct dsi_context {
+	unsigned long base;
+	struct videomode vm;
+	bool enabled;
+
+	u8 lanes;
+	u32 format;
+	u8 work_mode;
+	u8 burst_mode;
+
+	int irq0;
+	int irq1;
+	u32 int0_mask;
+	u32 int1_mask;
+
+	/* byte clock [KHz] */
+	u32 byte_clk;
+	/* escape clock [KHz] */
+	u32 esc_clk;
+
+	/* maximum time (ns) for data lanes from HS to LP */
+	u16 data_hs2lp;
+	/* maximum time (ns) for data lanes from LP to HS */
+	u16 data_lp2hs;
+	/* maximum time (ns) for clk lanes from HS to LP */
+	u16 clk_hs2lp;
+	/* maximum time (ns) for clk lanes from LP to HS */
+	u16 clk_lp2hs;
+	/* maximum time (ns) for BTA operation - REQUIRED */
+	u16 max_rd_time;
+
+	/* is 18-bit loosely packets (valid only when BPP == 18) */
+	bool is_18_loosely;
+	/* enable receiving frame ack packets - for video mode */
+	bool frame_ack_en;
+	/* enable receiving tear effect ack packets - for cmd mode */
+	bool te_ack_en;
+	/* enable non coninuous clock for energy saving */
+	bool nc_clk_en;
+};
+
+struct sprd_dsi {
+	struct device dev;
+	struct mipi_dsi_host host;
+	struct mipi_dsi_device *slave;
+	struct drm_encoder encoder;
+	struct drm_connector connector;
+	struct drm_bridge *bridge;
+	struct drm_panel *panel;
+	struct drm_display_mode *mode;
+	struct sprd_dphy *phy;
+	struct dsi_context ctx;
+};
+
+#endif /* __SPRD_DSI_H__ */
-- 
2.7.4

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Re: [PATCH RFC v7 6/6] drm/sprd: add Unisoc's drm mipi dsi&dphy driver

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 11658 bytes --]

Hi Kevin,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on robh/for-next]
[also build test WARNING on linus/master v5.9-rc7 next-20200925]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Kevin-Tang/Add-Unisoc-s-drm-kms-module/20200928-142937
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: mips-allyesconfig (attached as .config)
compiler: mips-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/1697e90e763d7cdd15122f9e8226a90513ef03ed
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Kevin-Tang/Add-Unisoc-s-drm-kms-module/20200928-142937
        git checkout 1697e90e763d7cdd15122f9e8226a90513ef03ed
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/sprd/sprd_dsi.c:185:6: warning: no previous prototype for 'sprd_dsi_init' [-Wmissing-prototypes]
     185 | void sprd_dsi_init(struct sprd_dsi *dsi)
         |      ^~~~~~~~~~~~~
>> drivers/gpu/drm/sprd/sprd_dsi.c:225:6: warning: no previous prototype for 'sprd_dsi_fini' [-Wmissing-prototypes]
     225 | void sprd_dsi_fini(struct sprd_dsi *dsi)
         |      ^~~~~~~~~~~~~
>> drivers/gpu/drm/sprd/sprd_dsi.c:240:5: warning: no previous prototype for 'sprd_dsi_dpi_video' [-Wmissing-prototypes]
     240 | int sprd_dsi_dpi_video(struct sprd_dsi *dsi)
         |     ^~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/sprd/sprd_dsi.c:370:6: warning: no previous prototype for 'sprd_dsi_edpi_video' [-Wmissing-prototypes]
     370 | void sprd_dsi_edpi_video(struct sprd_dsi *dsi)
         |      ^~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/sprd/sprd_dsi.c:408:5: warning: no previous prototype for 'sprd_dsi_wr_pkt' [-Wmissing-prototypes]
     408 | int sprd_dsi_wr_pkt(struct sprd_dsi *dsi, u8 vc, u8 type,
         |     ^~~~~~~~~~~~~~~
>> drivers/gpu/drm/sprd/sprd_dsi.c:463:5: warning: no previous prototype for 'sprd_dsi_rd_pkt' [-Wmissing-prototypes]
     463 | int sprd_dsi_rd_pkt(struct sprd_dsi *dsi, u8 vc, u8 type,
         |     ^~~~~~~~~~~~~~~
>> drivers/gpu/drm/sprd/sprd_dsi.c:517:6: warning: no previous prototype for 'sprd_dsi_set_work_mode' [-Wmissing-prototypes]
     517 | void sprd_dsi_set_work_mode(struct sprd_dsi *dsi, u8 mode)
         |      ^~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/sprd/sprd_dsi.c:527:5: warning: no previous prototype for 'sprd_dsi_get_work_mode' [-Wmissing-prototypes]
     527 | int sprd_dsi_get_work_mode(struct sprd_dsi *dsi)
         |     ^~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/sprd/sprd_dsi.c:537:6: warning: no previous prototype for 'sprd_dsi_lp_cmd_enable' [-Wmissing-prototypes]
     537 | void sprd_dsi_lp_cmd_enable(struct sprd_dsi *dsi, bool enable)
         |      ^~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/sprd/sprd_dsi.c:547:6: warning: no previous prototype for 'sprd_dsi_state_reset' [-Wmissing-prototypes]
     547 | void sprd_dsi_state_reset(struct sprd_dsi *dsi)
         |      ^~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/sprd/sprd_dsi.c:556:5: warning: no previous prototype for 'sprd_dsi_int_status' [-Wmissing-prototypes]
     556 | u32 sprd_dsi_int_status(struct sprd_dsi *dsi, int index)
         |     ^~~~~~~~~~~~~~~~~~~

vim +/sprd_dsi_init +185 drivers/gpu/drm/sprd/sprd_dsi.c

   181	
   182	#define ns_to_cycle(ns, byte_clk) \
   183		DIV_ROUND_UP((ns) * (byte_clk), 1000000)
   184	
 > 185	void sprd_dsi_init(struct sprd_dsi *dsi)
   186	{
   187		struct dsi_context *ctx = &dsi->ctx;
   188		u16 data_hs2lp, data_lp2hs, clk_hs2lp, clk_lp2hs;
   189		u16 max_rd_time;
   190		int div;
   191	
   192		dsi_power_enable(ctx, 0);
   193		dsi_int0_mask(ctx, 0xffffffff);
   194		dsi_int1_mask(ctx, 0xffffffff);
   195		dsi_cmd_mode(ctx);
   196		dsi_eotp_rx_en(ctx, 0);
   197		dsi_eotp_tx_en(ctx, 0);
   198		dsi_ecc_rx_en(ctx, 1);
   199		dsi_crc_rx_en(ctx, 1);
   200		dsi_bta_en(ctx, 1);
   201		dsi_video_vcid(ctx, 0);
   202		dsi_rx_vcid(ctx, 0);
   203	
   204		div = DIV_ROUND_UP(ctx->byte_clk, ctx->esc_clk);
   205		dsi_tx_escape_division(ctx, div);
   206	
   207		max_rd_time = ns_to_cycle(ctx->max_rd_time, ctx->byte_clk);
   208		dsi_max_read_time(ctx, max_rd_time);
   209	
   210		data_hs2lp = ns_to_cycle(ctx->data_hs2lp, ctx->byte_clk);
   211		data_lp2hs = ns_to_cycle(ctx->data_lp2hs, ctx->byte_clk);
   212		clk_hs2lp = ns_to_cycle(ctx->clk_hs2lp, ctx->byte_clk);
   213		clk_lp2hs = ns_to_cycle(ctx->clk_lp2hs, ctx->byte_clk);
   214		dsi_datalane_hs2lp_config(ctx, data_hs2lp);
   215		dsi_datalane_lp2hs_config(ctx, data_lp2hs);
   216		dsi_clklane_hs2lp_config(ctx, clk_hs2lp);
   217		dsi_clklane_lp2hs_config(ctx, clk_lp2hs);
   218	
   219		dsi_power_enable(ctx, 1);
   220	}
   221	
   222	/*
   223	 * Free up resources and shutdown host controller and PHY
   224	 */
 > 225	void sprd_dsi_fini(struct sprd_dsi *dsi)
   226	{
   227		struct dsi_context *ctx = &dsi->ctx;
   228	
   229		dsi_int0_mask(ctx, 0xffffffff);
   230		dsi_int1_mask(ctx, 0xffffffff);
   231		dsi_power_enable(ctx, 0);
   232	}
   233	
   234	/*
   235	 * If not in burst mode, it will compute the video and null packet sizes
   236	 * according to necessity.
   237	 * Configure timers for data lanes and/or clock lane to return to LP when
   238	 * bandwidth is not filled by data.
   239	 */
 > 240	int sprd_dsi_dpi_video(struct sprd_dsi *dsi)
   241	{
   242		struct dsi_context *ctx = &dsi->ctx;
   243		struct videomode *vm = &dsi->ctx.vm;
   244		u16 Bpp_x100;
   245		u16 video_size;
   246		u32 ratio_x1000;
   247		u16 null_pkt_size = 0;
   248		u8 video_size_step;
   249		u32 hs_to;
   250		u32 total_bytes;
   251		u32 bytes_per_chunk;
   252		u32 chunks = 0;
   253		u32 bytes_left = 0;
   254		u32 chunk_overhead;
   255		const u8 pkt_header = 6;
   256		u8 coding;
   257		int div;
   258		u16 hline;
   259	
   260		coding = fmt_to_coding(ctx->format);
   261		video_size = round_video_size(coding, vm->hactive);
   262		Bpp_x100 = calc_bytes_per_pixel_x100(coding);
   263		video_size_step = calc_video_size_step(coding);
   264		ratio_x1000 = ctx->byte_clk * 1000 / (vm->pixelclock / 1000);
   265		hline = vm->hactive + vm->hsync_len + vm->hfront_porch +
   266			vm->hback_porch;
   267	
   268		dsi_power_enable(ctx, 0);
   269		dsi_dpi_frame_ack_en(ctx, ctx->frame_ack_en);
   270		dsi_dpi_color_coding(ctx, coding);
   271		dsi_dpi_video_burst_mode(ctx, ctx->burst_mode);
   272		dsi_dpi_sig_delay(ctx, 95 * hline * ratio_x1000 / 100000);
   273		dsi_dpi_hline_time(ctx, hline * ratio_x1000 / 1000);
   274		dsi_dpi_hsync_time(ctx, vm->hsync_len * ratio_x1000 / 1000);
   275		dsi_dpi_hbp_time(ctx, vm->hback_porch * ratio_x1000 / 1000);
   276		dsi_dpi_vact(ctx, vm->vactive);
   277		dsi_dpi_vfp(ctx, vm->vfront_porch);
   278		dsi_dpi_vbp(ctx, vm->vback_porch);
   279		dsi_dpi_vsync(ctx, vm->vsync_len);
   280		dsi_dpi_hporch_lp_en(ctx, 1);
   281		dsi_dpi_vporch_lp_en(ctx, 1);
   282	
   283		hs_to = (hline * vm->vactive) + (2 * Bpp_x100) / 100;
   284		for (div = 0x80; (div < hs_to) && (div > 2); div--) {
   285			if ((hs_to % div) == 0) {
   286				dsi_timeout_clock_division(ctx, div);
   287				dsi_lp_rx_timeout(ctx, hs_to / div);
   288				dsi_hs_tx_timeout(ctx, hs_to / div);
   289				break;
   290			}
   291		}
   292	
   293		if (ctx->burst_mode == VIDEO_BURST_WITH_SYNC_PULSES) {
   294			dsi_dpi_video_packet_size(ctx, video_size);
   295			dsi_dpi_null_packet_size(ctx, 0);
   296			dsi_dpi_chunk_num(ctx, 0);
   297		} else {
   298			/* non burst transmission */
   299			null_pkt_size = 0;
   300	
   301			/* bytes to be sent - first as one chunk */
   302			bytes_per_chunk = vm->hactive * Bpp_x100 / 100 + pkt_header;
   303	
   304			/* hline total bytes from the DPI interface */
   305			total_bytes = (vm->hactive + vm->hfront_porch) *
   306					ratio_x1000 / ctx->lanes / 1000;
   307	
   308			/* check if the pixels actually fit on the DSI link */
   309			if (total_bytes < bytes_per_chunk) {
   310				DRM_ERROR("current resolution can not be set\n");
   311				return -EINVAL;
   312			}
   313	
   314			chunk_overhead = total_bytes - bytes_per_chunk;
   315	
   316			/* overhead higher than 1 -> enable multi packets */
   317			if (chunk_overhead > 1) {
   318	
   319				/* multi packets */
   320				for (video_size = video_size_step;
   321				     video_size < vm->hactive;
   322				     video_size += video_size_step) {
   323	
   324					if (vm->hactive * 1000 / video_size % 1000)
   325						continue;
   326	
   327					chunks = vm->hactive / video_size;
   328					bytes_per_chunk = Bpp_x100 * video_size / 100
   329							  + pkt_header;
   330					if (total_bytes >= (bytes_per_chunk * chunks)) {
   331						bytes_left = total_bytes -
   332							     bytes_per_chunk * chunks;
   333						break;
   334					}
   335				}
   336	
   337				/* prevent overflow (unsigned - unsigned) */
   338				if (bytes_left > (pkt_header * chunks)) {
   339					null_pkt_size = (bytes_left -
   340							pkt_header * chunks) / chunks;
   341					/* avoid register overflow */
   342					if (null_pkt_size > 1023)
   343						null_pkt_size = 1023;
   344				}
   345	
   346			} else {
   347	
   348				/* single packet */
   349				chunks = 1;
   350	
   351				/* must be a multiple of 4 except 18 loosely */
   352				for (video_size = vm->hactive;
   353				    (video_size % video_size_step) != 0;
   354				     video_size++)
   355					;
   356			}
   357	
   358			dsi_dpi_video_packet_size(ctx, video_size);
   359			dsi_dpi_null_packet_size(ctx, null_pkt_size);
   360			dsi_dpi_chunk_num(ctx, chunks);
   361		}
   362	
   363		dsi_int0_mask(ctx, ctx->int0_mask);
   364		dsi_int1_mask(ctx, ctx->int1_mask);
   365		dsi_power_enable(ctx, 1);
   366	
   367		return 0;
   368	}
   369	
 > 370	void sprd_dsi_edpi_video(struct sprd_dsi *dsi)
   371	{
   372		struct dsi_context *ctx = &dsi->ctx;
   373		const u32 fifo_depth = 1096;
   374		const u32 word_length = 4;
   375		u32 hactive = ctx->vm.hactive;
   376		u32 Bpp_x100;
   377		u32 max_fifo_len;
   378		u8 coding;
   379	
   380		coding = fmt_to_coding(ctx->format);
   381		Bpp_x100 = calc_bytes_per_pixel_x100(coding);
   382		max_fifo_len = word_length * fifo_depth * 100 / Bpp_x100;
   383	
   384		dsi_power_enable(ctx, 0);
   385		dsi_dpi_color_coding(ctx, coding);
   386		dsi_tear_effect_ack_en(ctx, ctx->te_ack_en);
   387	
   388		if (max_fifo_len > hactive)
   389			dsi_edpi_max_pkt_size(ctx, hactive);
   390		else
   391			dsi_edpi_max_pkt_size(ctx, max_fifo_len);
   392	
   393		dsi_int0_mask(ctx, ctx->int0_mask);
   394		dsi_int1_mask(ctx, ctx->int1_mask);
   395		dsi_power_enable(ctx, 1);
   396	}
   397	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 67629 bytes --]

Re: [PATCH RFC v7 0/6] Add Unisoc's drm kms module

[Sam Ravnborg]

Hi Kevin,

> v7:
> 1. Fix DTC unit name warnings
> 2. Fix the problem of maintainers
> 3. Call drmm_mode_config_init to mode config init
> 4. Embed drm_device in sprd_drm and use devm_drm_dev_alloc
> 5. Replace DRM_XXX with drm_xxx on KMS module, but not suitable for other subsystems
> 6. Remove plane_update stuff, dpu handles all the HW update in crtc->atomic_flush
> 7. Dsi&Dphy Code structure adjustment, all move to "sprd/"

I can see some of my feedback from last round of review is not
addressed. There were makefile fixes and then I asked for a high-level
intro.

Can you please revisit last round of review feedback to check what was
missed.

	Sam


> 
> Kevin Tang (6):
>   dt-bindings: display: add Unisoc's drm master bindings
>   drm/sprd: add Unisoc's drm kms master
>   dt-bindings: display: add Unisoc's dpu bindings
>   drm/sprd: add Unisoc's drm display controller driver
>   dt-bindings: display: add Unisoc's mipi dsi&dphy bindings
>   drm/sprd: add Unisoc's drm mipi dsi&dphy driver
> 
>  .../display/sprd/sprd,display-subsystem.yaml       |   39 +
>  .../bindings/display/sprd/sprd,sharkl3-dpu.yaml    |   83 ++
>  .../display/sprd/sprd,sharkl3-dsi-host.yaml        |   98 ++
>  .../display/sprd/sprd,sharkl3-dsi-phy.yaml         |   75 +
>  drivers/gpu/drm/Kconfig                            |    2 +
>  drivers/gpu/drm/Makefile                           |    1 +
>  drivers/gpu/drm/sprd/Kconfig                       |   13 +
>  drivers/gpu/drm/sprd/Makefile                      |   12 +
>  drivers/gpu/drm/sprd/dpu_r2p0.c                    |  636 +++++++++
>  drivers/gpu/drm/sprd/dw_dsi_ctrl.c                 |  792 +++++++++++
>  drivers/gpu/drm/sprd/dw_dsi_ctrl.h                 | 1475 ++++++++++++++++++++
>  drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c             |  276 ++++
>  drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h             |   34 +
>  drivers/gpu/drm/sprd/megacores_pll.c               |  315 +++++
>  drivers/gpu/drm/sprd/megacores_pll.h               |  146 ++
>  drivers/gpu/drm/sprd/sprd_dphy.c                   |  335 +++++
>  drivers/gpu/drm/sprd/sprd_dphy.h                   |   39 +
>  drivers/gpu/drm/sprd/sprd_dpu.c                    |  501 +++++++
>  drivers/gpu/drm/sprd/sprd_dpu.h                    |  217 +++
>  drivers/gpu/drm/sprd/sprd_drm.c                    |  263 ++++
>  drivers/gpu/drm/sprd/sprd_drm.h                    |   20 +
>  drivers/gpu/drm/sprd/sprd_dsi.c                    | 1102 +++++++++++++++
>  drivers/gpu/drm/sprd/sprd_dsi.h                    |  105 ++
>  23 files changed, 6579 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
>  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dpu.yaml
>  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
>  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-phy.yaml
>  create mode 100644 drivers/gpu/drm/sprd/Kconfig
>  create mode 100644 drivers/gpu/drm/sprd/Makefile
>  create mode 100644 drivers/gpu/drm/sprd/dpu_r2p0.c
>  create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl.c
>  create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl.h
>  create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c
>  create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h
>  create mode 100644 drivers/gpu/drm/sprd/megacores_pll.c
>  create mode 100644 drivers/gpu/drm/sprd/megacores_pll.h
>  create mode 100644 drivers/gpu/drm/sprd/sprd_dphy.c
>  create mode 100644 drivers/gpu/drm/sprd/sprd_dphy.h
>  create mode 100644 drivers/gpu/drm/sprd/sprd_dpu.c
>  create mode 100644 drivers/gpu/drm/sprd/sprd_dpu.h
>  create mode 100644 drivers/gpu/drm/sprd/sprd_drm.c
>  create mode 100644 drivers/gpu/drm/sprd/sprd_drm.h
>  create mode 100644 drivers/gpu/drm/sprd/sprd_dsi.c
>  create mode 100644 drivers/gpu/drm/sprd/sprd_dsi.h
> 
> -- 
> 2.7.4
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [PATCH RFC v7 0/6] Add Unisoc's drm kms module

[Sam Ravnborg]

Hi Kevin,

> v7:
> 1. Fix DTC unit name warnings
> 2. Fix the problem of maintainers
> 3. Call drmm_mode_config_init to mode config init
> 4. Embed drm_device in sprd_drm and use devm_drm_dev_alloc
> 5. Replace DRM_XXX with drm_xxx on KMS module, but not suitable for other subsystems
> 6. Remove plane_update stuff, dpu handles all the HW update in crtc->atomic_flush
> 7. Dsi&Dphy Code structure adjustment, all move to "sprd/"

I can see some of my feedback from last round of review is not
addressed. There were makefile fixes and then I asked for a high-level
intro.

Can you please revisit last round of review feedback to check what was
missed.

	Sam


> 
> Kevin Tang (6):
>   dt-bindings: display: add Unisoc's drm master bindings
>   drm/sprd: add Unisoc's drm kms master
>   dt-bindings: display: add Unisoc's dpu bindings
>   drm/sprd: add Unisoc's drm display controller driver
>   dt-bindings: display: add Unisoc's mipi dsi&dphy bindings
>   drm/sprd: add Unisoc's drm mipi dsi&dphy driver
> 
>  .../display/sprd/sprd,display-subsystem.yaml       |   39 +
>  .../bindings/display/sprd/sprd,sharkl3-dpu.yaml    |   83 ++
>  .../display/sprd/sprd,sharkl3-dsi-host.yaml        |   98 ++
>  .../display/sprd/sprd,sharkl3-dsi-phy.yaml         |   75 +
>  drivers/gpu/drm/Kconfig                            |    2 +
>  drivers/gpu/drm/Makefile                           |    1 +
>  drivers/gpu/drm/sprd/Kconfig                       |   13 +
>  drivers/gpu/drm/sprd/Makefile                      |   12 +
>  drivers/gpu/drm/sprd/dpu_r2p0.c                    |  636 +++++++++
>  drivers/gpu/drm/sprd/dw_dsi_ctrl.c                 |  792 +++++++++++
>  drivers/gpu/drm/sprd/dw_dsi_ctrl.h                 | 1475 ++++++++++++++++++++
>  drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c             |  276 ++++
>  drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h             |   34 +
>  drivers/gpu/drm/sprd/megacores_pll.c               |  315 +++++
>  drivers/gpu/drm/sprd/megacores_pll.h               |  146 ++
>  drivers/gpu/drm/sprd/sprd_dphy.c                   |  335 +++++
>  drivers/gpu/drm/sprd/sprd_dphy.h                   |   39 +
>  drivers/gpu/drm/sprd/sprd_dpu.c                    |  501 +++++++
>  drivers/gpu/drm/sprd/sprd_dpu.h                    |  217 +++
>  drivers/gpu/drm/sprd/sprd_drm.c                    |  263 ++++
>  drivers/gpu/drm/sprd/sprd_drm.h                    |   20 +
>  drivers/gpu/drm/sprd/sprd_dsi.c                    | 1102 +++++++++++++++
>  drivers/gpu/drm/sprd/sprd_dsi.h                    |  105 ++
>  23 files changed, 6579 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml
>  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dpu.yaml
>  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml
>  create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-phy.yaml
>  create mode 100644 drivers/gpu/drm/sprd/Kconfig
>  create mode 100644 drivers/gpu/drm/sprd/Makefile
>  create mode 100644 drivers/gpu/drm/sprd/dpu_r2p0.c
>  create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl.c
>  create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl.h
>  create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.c
>  create mode 100644 drivers/gpu/drm/sprd/dw_dsi_ctrl_ppi.h
>  create mode 100644 drivers/gpu/drm/sprd/megacores_pll.c
>  create mode 100644 drivers/gpu/drm/sprd/megacores_pll.h
>  create mode 100644 drivers/gpu/drm/sprd/sprd_dphy.c
>  create mode 100644 drivers/gpu/drm/sprd/sprd_dphy.h
>  create mode 100644 drivers/gpu/drm/sprd/sprd_dpu.c
>  create mode 100644 drivers/gpu/drm/sprd/sprd_dpu.h
>  create mode 100644 drivers/gpu/drm/sprd/sprd_drm.c
>  create mode 100644 drivers/gpu/drm/sprd/sprd_drm.h
>  create mode 100644 drivers/gpu/drm/sprd/sprd_dsi.c
>  create mode 100644 drivers/gpu/drm/sprd/sprd_dsi.h
> 
> -- 
> 2.7.4
> 
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