* [PATCH v7 0/7] drm: rcar-du: Add Color Management Module (CMM)
@ 2019-11-13 10:05 ` Jacopo Mondi
0 siblings, 0 replies; 30+ messages in thread
From: Jacopo Mondi @ 2019-11-13 10:05 UTC (permalink / raw)
To: laurent.pinchart, kieran.bingham+renesas, geert, horms, uli+renesas
Cc: Jacopo Mondi, airlied, daniel, linux-renesas-soc, dri-devel,
linux-kernel
An additional round for cmm to fix the KConfig issue reported by Dave spotted
while collecting Laurent's pull request for the v5.5 merge window, which we've
now missed.
I could have sent a 6.2 version of the single 3/7 patch, but given I already
sent a 6.1 for this same one, I assumed a single series would have been
easier to collect, considering we're anyway late for this merge window.
The DTS patches have been collected by Geert already.
Thanks
j
Detailed v1->v5 change log
https://lkml.org/lkml/2019/10/15/337
v6->v7
- Include the two updates for 3/7 and 5/7 I've sent as v6.1 against the v6
series
- Make the DRM_RCAR_CMM symbol a tristate and make it implied by DRM_RCAR_DU
to prevent having DU built-in and CMM has a module, which causes linkage
errors due to unresolved symbols.
Jacopo Mondi (7):
dt-bindings: display: renesas,cmm: Add R-Car CMM documentation
dt-bindings: display, renesas,du: Document cmms property
drm: rcar-du: Add support for CMM
drm: rcar-du: kms: Initialize CMM instances
drm: rcar-du: crtc: Control CMM operations
drm: rcar-du: crtc: Register GAMMA_LUT properties
drm: rcar-du: kms: Expand comment in vsps parsing routine
.../bindings/display/renesas,cmm.yaml | 67 ++++++
.../bindings/display/renesas,du.txt | 5 +
drivers/gpu/drm/rcar-du/Kconfig | 8 +
drivers/gpu/drm/rcar-du/Makefile | 1 +
drivers/gpu/drm/rcar-du/rcar_cmm.c | 212 ++++++++++++++++++
drivers/gpu/drm/rcar-du/rcar_cmm.h | 58 +++++
drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 65 ++++++
drivers/gpu/drm/rcar-du/rcar_du_crtc.h | 2 +
drivers/gpu/drm/rcar-du/rcar_du_drv.h | 2 +
drivers/gpu/drm/rcar-du/rcar_du_group.c | 10 +
drivers/gpu/drm/rcar-du/rcar_du_group.h | 2 +
drivers/gpu/drm/rcar-du/rcar_du_kms.c | 82 ++++++-
drivers/gpu/drm/rcar-du/rcar_du_regs.h | 5 +
13 files changed, 518 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/display/renesas,cmm.yaml
create mode 100644 drivers/gpu/drm/rcar-du/rcar_cmm.c
create mode 100644 drivers/gpu/drm/rcar-du/rcar_cmm.h
--
2.23.0
^ permalink raw reply [flat|nested] 30+ messages in thread
* [PATCH v7 0/7] drm: rcar-du: Add Color Management Module (CMM)
@ 2019-11-13 10:05 ` Jacopo Mondi
0 siblings, 0 replies; 30+ messages in thread
From: Jacopo Mondi @ 2019-11-13 10:05 UTC (permalink / raw)
To: laurent.pinchart, kieran.bingham+renesas, geert, horms, uli+renesas
Cc: airlied, linux-kernel, dri-devel, linux-renesas-soc, Jacopo Mondi
An additional round for cmm to fix the KConfig issue reported by Dave spotted
while collecting Laurent's pull request for the v5.5 merge window, which we've
now missed.
I could have sent a 6.2 version of the single 3/7 patch, but given I already
sent a 6.1 for this same one, I assumed a single series would have been
easier to collect, considering we're anyway late for this merge window.
The DTS patches have been collected by Geert already.
Thanks
j
Detailed v1->v5 change log
https://lkml.org/lkml/2019/10/15/337
v6->v7
- Include the two updates for 3/7 and 5/7 I've sent as v6.1 against the v6
series
- Make the DRM_RCAR_CMM symbol a tristate and make it implied by DRM_RCAR_DU
to prevent having DU built-in and CMM has a module, which causes linkage
errors due to unresolved symbols.
Jacopo Mondi (7):
dt-bindings: display: renesas,cmm: Add R-Car CMM documentation
dt-bindings: display, renesas,du: Document cmms property
drm: rcar-du: Add support for CMM
drm: rcar-du: kms: Initialize CMM instances
drm: rcar-du: crtc: Control CMM operations
drm: rcar-du: crtc: Register GAMMA_LUT properties
drm: rcar-du: kms: Expand comment in vsps parsing routine
.../bindings/display/renesas,cmm.yaml | 67 ++++++
.../bindings/display/renesas,du.txt | 5 +
drivers/gpu/drm/rcar-du/Kconfig | 8 +
drivers/gpu/drm/rcar-du/Makefile | 1 +
drivers/gpu/drm/rcar-du/rcar_cmm.c | 212 ++++++++++++++++++
drivers/gpu/drm/rcar-du/rcar_cmm.h | 58 +++++
drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 65 ++++++
drivers/gpu/drm/rcar-du/rcar_du_crtc.h | 2 +
drivers/gpu/drm/rcar-du/rcar_du_drv.h | 2 +
drivers/gpu/drm/rcar-du/rcar_du_group.c | 10 +
drivers/gpu/drm/rcar-du/rcar_du_group.h | 2 +
drivers/gpu/drm/rcar-du/rcar_du_kms.c | 82 ++++++-
drivers/gpu/drm/rcar-du/rcar_du_regs.h | 5 +
13 files changed, 518 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/display/renesas,cmm.yaml
create mode 100644 drivers/gpu/drm/rcar-du/rcar_cmm.c
create mode 100644 drivers/gpu/drm/rcar-du/rcar_cmm.h
--
2.23.0
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 30+ messages in thread
* [PATCH v7 1/7] dt-bindings: display: renesas,cmm: Add R-Car CMM documentation
@ 2019-11-13 10:05 ` Jacopo Mondi
0 siblings, 0 replies; 30+ messages in thread
From: Jacopo Mondi @ 2019-11-13 10:05 UTC (permalink / raw)
To: laurent.pinchart, kieran.bingham+renesas, geert, horms, uli+renesas
Cc: Jacopo Mondi, airlied, daniel, linux-renesas-soc, dri-devel,
linux-kernel, Rob Herring
Add device tree bindings documentation for the Renesas R-Car Display
Unit Color Management Module.
CMM is the image enhancement module available on each R-Car DU video
channel on R-Car Gen2 and Gen3 SoCs (V3H and V3M excluded).
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
.../bindings/display/renesas,cmm.yaml | 67 +++++++++++++++++++
1 file changed, 67 insertions(+)
create mode 100644 Documentation/devicetree/bindings/display/renesas,cmm.yaml
diff --git a/Documentation/devicetree/bindings/display/renesas,cmm.yaml b/Documentation/devicetree/bindings/display/renesas,cmm.yaml
new file mode 100644
index 000000000000..a57037b9e9ba
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/renesas,cmm.yaml
@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/renesas,cmm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas R-Car Color Management Module (CMM)
+
+maintainers:
+ - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ - Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
+ - Jacopo Mondi <jacopo+renesas@jmondi.org>
+
+description: |+
+ Renesas R-Car color management module connected to R-Car DU video channels.
+ It provides image enhancement functions such as 1-D look-up tables (LUT),
+ 3-D look-up tables (CLU), 1D-histogram generation (HGO), and color
+ space conversion (CSC).
+
+properties:
+ compatible:
+ oneOf:
+ - items:
+ - enum:
+ - renesas,r8a7795-cmm
+ - renesas,r8a7796-cmm
+ - renesas,r8a77965-cmm
+ - renesas,r8a77990-cmm
+ - renesas,r8a77995-cmm
+ - const: renesas,rcar-gen3-cmm
+ - items:
+ - const: renesas,rcar-gen2-cmm
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ resets:
+ maxItems: 1
+
+ power-domains:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - resets
+ - power-domains
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/r8a7796-cpg-mssr.h>
+ #include <dt-bindings/power/r8a7796-sysc.h>
+
+ cmm0: cmm@fea40000 {
+ compatible = "renesas,r8a7796-cmm",
+ "renesas,rcar-gen3-cmm";
+ reg = <0 0xfea40000 0 0x1000>;
+ power-domains = <&sysc R8A7796_PD_ALWAYS_ON>;
+ clocks = <&cpg CPG_MOD 711>;
+ resets = <&cpg 711>;
+ };
--
2.23.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v7 1/7] dt-bindings: display: renesas, cmm: Add R-Car CMM documentation
@ 2019-11-13 10:05 ` Jacopo Mondi
0 siblings, 0 replies; 30+ messages in thread
From: Jacopo Mondi @ 2019-11-13 10:05 UTC (permalink / raw)
To: laurent.pinchart, kieran.bingham+renesas, geert, horms, uli+renesas
Cc: airlied, linux-kernel, dri-devel, linux-renesas-soc, Jacopo Mondi
Add device tree bindings documentation for the Renesas R-Car Display
Unit Color Management Module.
CMM is the image enhancement module available on each R-Car DU video
channel on R-Car Gen2 and Gen3 SoCs (V3H and V3M excluded).
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
.../bindings/display/renesas,cmm.yaml | 67 +++++++++++++++++++
1 file changed, 67 insertions(+)
create mode 100644 Documentation/devicetree/bindings/display/renesas,cmm.yaml
diff --git a/Documentation/devicetree/bindings/display/renesas,cmm.yaml b/Documentation/devicetree/bindings/display/renesas,cmm.yaml
new file mode 100644
index 000000000000..a57037b9e9ba
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/renesas,cmm.yaml
@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/renesas,cmm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas R-Car Color Management Module (CMM)
+
+maintainers:
+ - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ - Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
+ - Jacopo Mondi <jacopo+renesas@jmondi.org>
+
+description: |+
+ Renesas R-Car color management module connected to R-Car DU video channels.
+ It provides image enhancement functions such as 1-D look-up tables (LUT),
+ 3-D look-up tables (CLU), 1D-histogram generation (HGO), and color
+ space conversion (CSC).
+
+properties:
+ compatible:
+ oneOf:
+ - items:
+ - enum:
+ - renesas,r8a7795-cmm
+ - renesas,r8a7796-cmm
+ - renesas,r8a77965-cmm
+ - renesas,r8a77990-cmm
+ - renesas,r8a77995-cmm
+ - const: renesas,rcar-gen3-cmm
+ - items:
+ - const: renesas,rcar-gen2-cmm
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ resets:
+ maxItems: 1
+
+ power-domains:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - resets
+ - power-domains
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/clock/r8a7796-cpg-mssr.h>
+ #include <dt-bindings/power/r8a7796-sysc.h>
+
+ cmm0: cmm@fea40000 {
+ compatible = "renesas,r8a7796-cmm",
+ "renesas,rcar-gen3-cmm";
+ reg = <0 0xfea40000 0 0x1000>;
+ power-domains = <&sysc R8A7796_PD_ALWAYS_ON>;
+ clocks = <&cpg CPG_MOD 711>;
+ resets = <&cpg 711>;
+ };
--
2.23.0
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v7 2/7] dt-bindings: display, renesas,du: Document cmms property
@ 2019-11-13 10:05 ` Jacopo Mondi
0 siblings, 0 replies; 30+ messages in thread
From: Jacopo Mondi @ 2019-11-13 10:05 UTC (permalink / raw)
To: laurent.pinchart, kieran.bingham+renesas, geert, horms, uli+renesas
Cc: Jacopo Mondi, airlied, daniel, linux-renesas-soc, dri-devel,
linux-kernel, Rob Herring
Document the newly added 'cmms' property which accepts a list of phandle
and channel index pairs that point to the CMM units available for each
Display Unit output video channel.
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
Documentation/devicetree/bindings/display/renesas,du.txt | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/Documentation/devicetree/bindings/display/renesas,du.txt b/Documentation/devicetree/bindings/display/renesas,du.txt
index c97dfacad281..3d9809b486b6 100644
--- a/Documentation/devicetree/bindings/display/renesas,du.txt
+++ b/Documentation/devicetree/bindings/display/renesas,du.txt
@@ -45,6 +45,10 @@ Required Properties:
instance that serves the DU channel, and the channel index identifies the
LIF instance in that VSP.
+ - renesas,cmms: A list of phandles to the CMM instances present in the SoC,
+ one for each available DU channel. The property shall not be specified for
+ SoCs that do not provide any CMM (such as V3M and V3H).
+
Required nodes:
The connections to the DU output video ports are modeled using the OF graph
@@ -91,6 +95,7 @@ Example: R8A7795 (R-Car H3) ES2.0 DU
<&cpg CPG_MOD 721>;
clock-names = "du.0", "du.1", "du.2", "du.3";
vsps = <&vspd0 0>, <&vspd1 0>, <&vspd2 0>, <&vspd0 1>;
+ renesas,cmms = <&cmm0>, <&cmm1>, <&cmm2>, <&cmm3>;
ports {
#address-cells = <1>;
--
2.23.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v7 2/7] dt-bindings: display, renesas, du: Document cmms property
@ 2019-11-13 10:05 ` Jacopo Mondi
0 siblings, 0 replies; 30+ messages in thread
From: Jacopo Mondi @ 2019-11-13 10:05 UTC (permalink / raw)
To: laurent.pinchart, kieran.bingham+renesas, geert, horms, uli+renesas
Cc: airlied, linux-kernel, dri-devel, linux-renesas-soc, Jacopo Mondi
Document the newly added 'cmms' property which accepts a list of phandle
and channel index pairs that point to the CMM units available for each
Display Unit output video channel.
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
Documentation/devicetree/bindings/display/renesas,du.txt | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/Documentation/devicetree/bindings/display/renesas,du.txt b/Documentation/devicetree/bindings/display/renesas,du.txt
index c97dfacad281..3d9809b486b6 100644
--- a/Documentation/devicetree/bindings/display/renesas,du.txt
+++ b/Documentation/devicetree/bindings/display/renesas,du.txt
@@ -45,6 +45,10 @@ Required Properties:
instance that serves the DU channel, and the channel index identifies the
LIF instance in that VSP.
+ - renesas,cmms: A list of phandles to the CMM instances present in the SoC,
+ one for each available DU channel. The property shall not be specified for
+ SoCs that do not provide any CMM (such as V3M and V3H).
+
Required nodes:
The connections to the DU output video ports are modeled using the OF graph
@@ -91,6 +95,7 @@ Example: R8A7795 (R-Car H3) ES2.0 DU
<&cpg CPG_MOD 721>;
clock-names = "du.0", "du.1", "du.2", "du.3";
vsps = <&vspd0 0>, <&vspd1 0>, <&vspd2 0>, <&vspd0 1>;
+ renesas,cmms = <&cmm0>, <&cmm1>, <&cmm2>, <&cmm3>;
ports {
#address-cells = <1>;
--
2.23.0
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v7 3/7] drm: rcar-du: Add support for CMM
@ 2019-11-13 10:05 ` Jacopo Mondi
0 siblings, 0 replies; 30+ messages in thread
From: Jacopo Mondi @ 2019-11-13 10:05 UTC (permalink / raw)
To: laurent.pinchart, kieran.bingham+renesas, geert, horms, uli+renesas
Cc: Jacopo Mondi, airlied, daniel, linux-renesas-soc, dri-devel,
linux-kernel
Add a driver for the R-Car Display Unit Color Correction Module.
In most of Gen3 SoCs, each DU output channel is provided with a CMM unit
to perform image enhancement and color correction.
Add support for CMM through a driver that supports configuration of
the 1-dimensional LUT table. More advanced CMM features will be
implemented on top of this initial one.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
v6 -> v7
- Expand rcar_cmm_setup() function documentation to detail its relationship
with rcar_cmm_enable() and their call order precedence.
- Kconfig update: Make DRM_RCAR_CMM a tristate option and 'imply' it from the
RCAR_DU one. This guarantees that if DU is built as a module CMM can only be
built as a module as well. At the same time, if DU is built-in, CMM can
be built-in only.
---
drivers/gpu/drm/rcar-du/Kconfig | 8 ++
drivers/gpu/drm/rcar-du/Makefile | 1 +
drivers/gpu/drm/rcar-du/rcar_cmm.c | 217 +++++++++++++++++++++++++++++
drivers/gpu/drm/rcar-du/rcar_cmm.h | 58 ++++++++
4 files changed, 284 insertions(+)
create mode 100644 drivers/gpu/drm/rcar-du/rcar_cmm.c
create mode 100644 drivers/gpu/drm/rcar-du/rcar_cmm.h
diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig
index 1529849e217e..6ed7a4f3c44e 100644
--- a/drivers/gpu/drm/rcar-du/Kconfig
+++ b/drivers/gpu/drm/rcar-du/Kconfig
@@ -5,6 +5,7 @@ config DRM_RCAR_DU
depends on ARM || ARM64
depends on ARCH_RENESAS || COMPILE_TEST
imply DRM_RCAR_LVDS
+ imply DRM_RCAR_CMM
select DRM_KMS_HELPER
select DRM_KMS_CMA_HELPER
select DRM_GEM_CMA_HELPER
@@ -13,6 +14,13 @@ config DRM_RCAR_DU
Choose this option if you have an R-Car chipset.
If M is selected the module will be called rcar-du-drm.
+config DRM_RCAR_CMM
+ tristate "R-Car DU Color Management Module (CMM) Support"
+ depends on DRM && OF
+ depends on DRM_RCAR_DU
+ help
+ Enable support for R-Car Color Management Module (CMM).
+
config DRM_RCAR_DW_HDMI
tristate "R-Car DU Gen3 HDMI Encoder Support"
depends on DRM && OF
diff --git a/drivers/gpu/drm/rcar-du/Makefile b/drivers/gpu/drm/rcar-du/Makefile
index 6c2ed9c46467..4d1187ccc3e5 100644
--- a/drivers/gpu/drm/rcar-du/Makefile
+++ b/drivers/gpu/drm/rcar-du/Makefile
@@ -15,6 +15,7 @@ rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS) += rcar_du_of.o \
rcar-du-drm-$(CONFIG_DRM_RCAR_VSP) += rcar_du_vsp.o
rcar-du-drm-$(CONFIG_DRM_RCAR_WRITEBACK) += rcar_du_writeback.o
+obj-$(CONFIG_DRM_RCAR_CMM) += rcar_cmm.o
obj-$(CONFIG_DRM_RCAR_DU) += rcar-du-drm.o
obj-$(CONFIG_DRM_RCAR_DW_HDMI) += rcar_dw_hdmi.o
obj-$(CONFIG_DRM_RCAR_LVDS) += rcar_lvds.o
diff --git a/drivers/gpu/drm/rcar-du/rcar_cmm.c b/drivers/gpu/drm/rcar-du/rcar_cmm.c
new file mode 100644
index 000000000000..c578095b09a5
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_cmm.c
@@ -0,0 +1,217 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * rcar_cmm.c -- R-Car Display Unit Color Management Module
+ *
+ * Copyright (C) 2019 Jacopo Mondi <jacopo+renesas@jmondi.org>
+ */
+
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include <drm/drm_color_mgmt.h>
+
+#include "rcar_cmm.h"
+
+#define CM2_LUT_CTRL 0x0000
+#define CM2_LUT_CTRL_LUT_EN BIT(0)
+#define CM2_LUT_TBL_BASE 0x0600
+#define CM2_LUT_TBL(__i) (CM2_LUT_TBL_BASE + (__i) * 4)
+
+struct rcar_cmm {
+ void __iomem *base;
+
+ /*
+ * @lut: 1D-LUT state
+ * @lut.enabled: 1D-LUT enabled flag
+ */
+ struct {
+ bool enabled;
+ } lut;
+};
+
+static inline int rcar_cmm_read(struct rcar_cmm *rcmm, u32 reg)
+{
+ return ioread32(rcmm->base + reg);
+}
+
+static inline void rcar_cmm_write(struct rcar_cmm *rcmm, u32 reg, u32 data)
+{
+ iowrite32(data, rcmm->base + reg);
+}
+
+/*
+ * rcar_cmm_lut_write() - Scale the DRM LUT table entries to hardware precision
+ * and write to the CMM registers
+ * @rcmm: Pointer to the CMM device
+ * @drm_lut: Pointer to the DRM LUT table
+ */
+static void rcar_cmm_lut_write(struct rcar_cmm *rcmm,
+ const struct drm_color_lut *drm_lut)
+{
+ unsigned int i;
+
+ for (i = 0; i < CM2_LUT_SIZE; ++i) {
+ u32 entry = drm_color_lut_extract(drm_lut[i].red, 8) << 16
+ | drm_color_lut_extract(drm_lut[i].green, 8) << 8
+ | drm_color_lut_extract(drm_lut[i].blue, 8);
+
+ rcar_cmm_write(rcmm, CM2_LUT_TBL(i), entry);
+ }
+}
+
+/*
+ * rcar_cmm_setup() - Configure the CMM unit
+ * @pdev: The platform device associated with the CMM instance
+ * @config: The CMM unit configuration
+ *
+ * Configure the CMM unit with the given configuration. Currently enabling,
+ * disabling and programming of the 1-D LUT unit is supported.
+ *
+ * As rcar_cmm_setup() accesses the CMM registers the unit should be powered
+ * and its functional clock enabled. To guarantee this, before any call to
+ * this function is made, the CMM unit has to be enabled by calling
+ * rcar_cmm_enable() first.
+ *
+ * TODO: Add support for LUT double buffer operations to avoid updating the
+ * LUT table entries while a frame is being displayed.
+ */
+int rcar_cmm_setup(struct platform_device *pdev,
+ const struct rcar_cmm_config *config)
+{
+ struct rcar_cmm *rcmm = platform_get_drvdata(pdev);
+
+ /* Disable LUT if no table is provided. */
+ if (!config->lut.table) {
+ if (rcmm->lut.enabled) {
+ rcar_cmm_write(rcmm, CM2_LUT_CTRL, 0);
+ rcmm->lut.enabled = false;
+ }
+
+ return 0;
+ }
+
+ /* Enable LUT and program the new gamma table values. */
+ if (!rcmm->lut.enabled) {
+ rcar_cmm_write(rcmm, CM2_LUT_CTRL, CM2_LUT_CTRL_LUT_EN);
+ rcmm->lut.enabled = true;
+ }
+
+ rcar_cmm_lut_write(rcmm, config->lut.table);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rcar_cmm_setup);
+
+/*
+ * rcar_cmm_enable() - Enable the CMM unit
+ * @pdev: The platform device associated with the CMM instance
+ *
+ * When the output of the corresponding DU channel is routed to the CMM unit,
+ * the unit shall be enabled before the DU channel is started, and remain
+ * enabled until the channel is stopped. The CMM unit shall be disabled with
+ * rcar_cmm_disable().
+ *
+ * Calls to rcar_cmm_enable() and rcar_cmm_disable() are not reference-counted.
+ * It is an error to attempt to enable an already enabled CMM unit, or to
+ * attempt to disable a disabled unit.
+ */
+int rcar_cmm_enable(struct platform_device *pdev)
+{
+ int ret;
+
+ ret = pm_runtime_get_sync(&pdev->dev);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rcar_cmm_enable);
+
+/*
+ * rcar_cmm_disable() - Disable the CMM unit
+ * @pdev: The platform device associated with the CMM instance
+ *
+ * See rcar_cmm_enable() for usage information.
+ *
+ * Disabling the CMM unit disable all the internal processing blocks. The CMM
+ * state shall thus be restored with rcar_cmm_setup() when re-enabling the CMM
+ * unit after the next rcar_cmm_enable() call.
+ */
+void rcar_cmm_disable(struct platform_device *pdev)
+{
+ struct rcar_cmm *rcmm = platform_get_drvdata(pdev);
+
+ rcar_cmm_write(rcmm, CM2_LUT_CTRL, 0);
+ rcmm->lut.enabled = false;
+
+ pm_runtime_put(&pdev->dev);
+}
+EXPORT_SYMBOL_GPL(rcar_cmm_disable);
+
+/*
+ * rcar_cmm_init() - Initialize the CMM unit
+ * @pdev: The platform device associated with the CMM instance
+ *
+ * Return: 0 on success, -EPROBE_DEFER if the CMM is not available yet,
+ * -ENODEV if the DRM_RCAR_CMM config option is disabled
+ */
+int rcar_cmm_init(struct platform_device *pdev)
+{
+ struct rcar_cmm *rcmm = platform_get_drvdata(pdev);
+
+ if (!rcmm)
+ return -EPROBE_DEFER;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rcar_cmm_init);
+
+static int rcar_cmm_probe(struct platform_device *pdev)
+{
+ struct rcar_cmm *rcmm;
+
+ rcmm = devm_kzalloc(&pdev->dev, sizeof(*rcmm), GFP_KERNEL);
+ if (!rcmm)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, rcmm);
+
+ rcmm->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(rcmm->base))
+ return PTR_ERR(rcmm->base);
+
+ pm_runtime_enable(&pdev->dev);
+
+ return 0;
+}
+
+static int rcar_cmm_remove(struct platform_device *pdev)
+{
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+static const struct of_device_id rcar_cmm_of_table[] = {
+ { .compatible = "renesas,rcar-gen3-cmm", },
+ { .compatible = "renesas,rcar-gen2-cmm", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, rcar_cmm_of_table);
+
+static struct platform_driver rcar_cmm_platform_driver = {
+ .probe = rcar_cmm_probe,
+ .remove = rcar_cmm_remove,
+ .driver = {
+ .name = "rcar-cmm",
+ .of_match_table = rcar_cmm_of_table,
+ },
+};
+
+module_platform_driver(rcar_cmm_platform_driver);
+
+MODULE_AUTHOR("Jacopo Mondi <jacopo+renesas@jmondi.org>");
+MODULE_DESCRIPTION("Renesas R-Car CMM Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/rcar-du/rcar_cmm.h b/drivers/gpu/drm/rcar-du/rcar_cmm.h
new file mode 100644
index 000000000000..b5f7ec6db04a
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_cmm.h
@@ -0,0 +1,58 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * rcar_cmm.h -- R-Car Display Unit Color Management Module
+ *
+ * Copyright (C) 2019 Jacopo Mondi <jacopo+renesas@jmondi.org>
+ */
+
+#ifndef __RCAR_CMM_H__
+#define __RCAR_CMM_H__
+
+#define CM2_LUT_SIZE 256
+
+struct drm_color_lut;
+struct platform_device;
+
+/**
+ * struct rcar_cmm_config - CMM configuration
+ *
+ * @lut: 1D-LUT configuration
+ * @lut.table: 1D-LUT table entries. Disable LUT operations when NULL
+ */
+struct rcar_cmm_config {
+ struct {
+ struct drm_color_lut *table;
+ } lut;
+};
+
+#if IS_ENABLED(CONFIG_DRM_RCAR_CMM)
+int rcar_cmm_init(struct platform_device *pdev);
+
+int rcar_cmm_enable(struct platform_device *pdev);
+void rcar_cmm_disable(struct platform_device *pdev);
+
+int rcar_cmm_setup(struct platform_device *pdev,
+ const struct rcar_cmm_config *config);
+#else
+static inline int rcar_cmm_init(struct platform_device *pdev)
+{
+ return -ENODEV;
+}
+
+static inline int rcar_cmm_enable(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static inline void rcar_cmm_disable(struct platform_device *pdev)
+{
+}
+
+static inline int rcar_cmm_setup(struct platform_device *pdev,
+ const struct rcar_cmm_config *config)
+{
+ return 0;
+}
+#endif /* IS_ENABLED(CONFIG_DRM_RCAR_CMM) */
+
+#endif /* __RCAR_CMM_H__ */
--
2.23.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v7 3/7] drm: rcar-du: Add support for CMM
@ 2019-11-13 10:05 ` Jacopo Mondi
0 siblings, 0 replies; 30+ messages in thread
From: Jacopo Mondi @ 2019-11-13 10:05 UTC (permalink / raw)
To: laurent.pinchart, kieran.bingham+renesas, geert, horms, uli+renesas
Cc: airlied, linux-kernel, dri-devel, linux-renesas-soc, Jacopo Mondi
Add a driver for the R-Car Display Unit Color Correction Module.
In most of Gen3 SoCs, each DU output channel is provided with a CMM unit
to perform image enhancement and color correction.
Add support for CMM through a driver that supports configuration of
the 1-dimensional LUT table. More advanced CMM features will be
implemented on top of this initial one.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
v6 -> v7
- Expand rcar_cmm_setup() function documentation to detail its relationship
with rcar_cmm_enable() and their call order precedence.
- Kconfig update: Make DRM_RCAR_CMM a tristate option and 'imply' it from the
RCAR_DU one. This guarantees that if DU is built as a module CMM can only be
built as a module as well. At the same time, if DU is built-in, CMM can
be built-in only.
---
drivers/gpu/drm/rcar-du/Kconfig | 8 ++
drivers/gpu/drm/rcar-du/Makefile | 1 +
drivers/gpu/drm/rcar-du/rcar_cmm.c | 217 +++++++++++++++++++++++++++++
drivers/gpu/drm/rcar-du/rcar_cmm.h | 58 ++++++++
4 files changed, 284 insertions(+)
create mode 100644 drivers/gpu/drm/rcar-du/rcar_cmm.c
create mode 100644 drivers/gpu/drm/rcar-du/rcar_cmm.h
diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig
index 1529849e217e..6ed7a4f3c44e 100644
--- a/drivers/gpu/drm/rcar-du/Kconfig
+++ b/drivers/gpu/drm/rcar-du/Kconfig
@@ -5,6 +5,7 @@ config DRM_RCAR_DU
depends on ARM || ARM64
depends on ARCH_RENESAS || COMPILE_TEST
imply DRM_RCAR_LVDS
+ imply DRM_RCAR_CMM
select DRM_KMS_HELPER
select DRM_KMS_CMA_HELPER
select DRM_GEM_CMA_HELPER
@@ -13,6 +14,13 @@ config DRM_RCAR_DU
Choose this option if you have an R-Car chipset.
If M is selected the module will be called rcar-du-drm.
+config DRM_RCAR_CMM
+ tristate "R-Car DU Color Management Module (CMM) Support"
+ depends on DRM && OF
+ depends on DRM_RCAR_DU
+ help
+ Enable support for R-Car Color Management Module (CMM).
+
config DRM_RCAR_DW_HDMI
tristate "R-Car DU Gen3 HDMI Encoder Support"
depends on DRM && OF
diff --git a/drivers/gpu/drm/rcar-du/Makefile b/drivers/gpu/drm/rcar-du/Makefile
index 6c2ed9c46467..4d1187ccc3e5 100644
--- a/drivers/gpu/drm/rcar-du/Makefile
+++ b/drivers/gpu/drm/rcar-du/Makefile
@@ -15,6 +15,7 @@ rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS) += rcar_du_of.o \
rcar-du-drm-$(CONFIG_DRM_RCAR_VSP) += rcar_du_vsp.o
rcar-du-drm-$(CONFIG_DRM_RCAR_WRITEBACK) += rcar_du_writeback.o
+obj-$(CONFIG_DRM_RCAR_CMM) += rcar_cmm.o
obj-$(CONFIG_DRM_RCAR_DU) += rcar-du-drm.o
obj-$(CONFIG_DRM_RCAR_DW_HDMI) += rcar_dw_hdmi.o
obj-$(CONFIG_DRM_RCAR_LVDS) += rcar_lvds.o
diff --git a/drivers/gpu/drm/rcar-du/rcar_cmm.c b/drivers/gpu/drm/rcar-du/rcar_cmm.c
new file mode 100644
index 000000000000..c578095b09a5
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_cmm.c
@@ -0,0 +1,217 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * rcar_cmm.c -- R-Car Display Unit Color Management Module
+ *
+ * Copyright (C) 2019 Jacopo Mondi <jacopo+renesas@jmondi.org>
+ */
+
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include <drm/drm_color_mgmt.h>
+
+#include "rcar_cmm.h"
+
+#define CM2_LUT_CTRL 0x0000
+#define CM2_LUT_CTRL_LUT_EN BIT(0)
+#define CM2_LUT_TBL_BASE 0x0600
+#define CM2_LUT_TBL(__i) (CM2_LUT_TBL_BASE + (__i) * 4)
+
+struct rcar_cmm {
+ void __iomem *base;
+
+ /*
+ * @lut: 1D-LUT state
+ * @lut.enabled: 1D-LUT enabled flag
+ */
+ struct {
+ bool enabled;
+ } lut;
+};
+
+static inline int rcar_cmm_read(struct rcar_cmm *rcmm, u32 reg)
+{
+ return ioread32(rcmm->base + reg);
+}
+
+static inline void rcar_cmm_write(struct rcar_cmm *rcmm, u32 reg, u32 data)
+{
+ iowrite32(data, rcmm->base + reg);
+}
+
+/*
+ * rcar_cmm_lut_write() - Scale the DRM LUT table entries to hardware precision
+ * and write to the CMM registers
+ * @rcmm: Pointer to the CMM device
+ * @drm_lut: Pointer to the DRM LUT table
+ */
+static void rcar_cmm_lut_write(struct rcar_cmm *rcmm,
+ const struct drm_color_lut *drm_lut)
+{
+ unsigned int i;
+
+ for (i = 0; i < CM2_LUT_SIZE; ++i) {
+ u32 entry = drm_color_lut_extract(drm_lut[i].red, 8) << 16
+ | drm_color_lut_extract(drm_lut[i].green, 8) << 8
+ | drm_color_lut_extract(drm_lut[i].blue, 8);
+
+ rcar_cmm_write(rcmm, CM2_LUT_TBL(i), entry);
+ }
+}
+
+/*
+ * rcar_cmm_setup() - Configure the CMM unit
+ * @pdev: The platform device associated with the CMM instance
+ * @config: The CMM unit configuration
+ *
+ * Configure the CMM unit with the given configuration. Currently enabling,
+ * disabling and programming of the 1-D LUT unit is supported.
+ *
+ * As rcar_cmm_setup() accesses the CMM registers the unit should be powered
+ * and its functional clock enabled. To guarantee this, before any call to
+ * this function is made, the CMM unit has to be enabled by calling
+ * rcar_cmm_enable() first.
+ *
+ * TODO: Add support for LUT double buffer operations to avoid updating the
+ * LUT table entries while a frame is being displayed.
+ */
+int rcar_cmm_setup(struct platform_device *pdev,
+ const struct rcar_cmm_config *config)
+{
+ struct rcar_cmm *rcmm = platform_get_drvdata(pdev);
+
+ /* Disable LUT if no table is provided. */
+ if (!config->lut.table) {
+ if (rcmm->lut.enabled) {
+ rcar_cmm_write(rcmm, CM2_LUT_CTRL, 0);
+ rcmm->lut.enabled = false;
+ }
+
+ return 0;
+ }
+
+ /* Enable LUT and program the new gamma table values. */
+ if (!rcmm->lut.enabled) {
+ rcar_cmm_write(rcmm, CM2_LUT_CTRL, CM2_LUT_CTRL_LUT_EN);
+ rcmm->lut.enabled = true;
+ }
+
+ rcar_cmm_lut_write(rcmm, config->lut.table);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rcar_cmm_setup);
+
+/*
+ * rcar_cmm_enable() - Enable the CMM unit
+ * @pdev: The platform device associated with the CMM instance
+ *
+ * When the output of the corresponding DU channel is routed to the CMM unit,
+ * the unit shall be enabled before the DU channel is started, and remain
+ * enabled until the channel is stopped. The CMM unit shall be disabled with
+ * rcar_cmm_disable().
+ *
+ * Calls to rcar_cmm_enable() and rcar_cmm_disable() are not reference-counted.
+ * It is an error to attempt to enable an already enabled CMM unit, or to
+ * attempt to disable a disabled unit.
+ */
+int rcar_cmm_enable(struct platform_device *pdev)
+{
+ int ret;
+
+ ret = pm_runtime_get_sync(&pdev->dev);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rcar_cmm_enable);
+
+/*
+ * rcar_cmm_disable() - Disable the CMM unit
+ * @pdev: The platform device associated with the CMM instance
+ *
+ * See rcar_cmm_enable() for usage information.
+ *
+ * Disabling the CMM unit disable all the internal processing blocks. The CMM
+ * state shall thus be restored with rcar_cmm_setup() when re-enabling the CMM
+ * unit after the next rcar_cmm_enable() call.
+ */
+void rcar_cmm_disable(struct platform_device *pdev)
+{
+ struct rcar_cmm *rcmm = platform_get_drvdata(pdev);
+
+ rcar_cmm_write(rcmm, CM2_LUT_CTRL, 0);
+ rcmm->lut.enabled = false;
+
+ pm_runtime_put(&pdev->dev);
+}
+EXPORT_SYMBOL_GPL(rcar_cmm_disable);
+
+/*
+ * rcar_cmm_init() - Initialize the CMM unit
+ * @pdev: The platform device associated with the CMM instance
+ *
+ * Return: 0 on success, -EPROBE_DEFER if the CMM is not available yet,
+ * -ENODEV if the DRM_RCAR_CMM config option is disabled
+ */
+int rcar_cmm_init(struct platform_device *pdev)
+{
+ struct rcar_cmm *rcmm = platform_get_drvdata(pdev);
+
+ if (!rcmm)
+ return -EPROBE_DEFER;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rcar_cmm_init);
+
+static int rcar_cmm_probe(struct platform_device *pdev)
+{
+ struct rcar_cmm *rcmm;
+
+ rcmm = devm_kzalloc(&pdev->dev, sizeof(*rcmm), GFP_KERNEL);
+ if (!rcmm)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, rcmm);
+
+ rcmm->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(rcmm->base))
+ return PTR_ERR(rcmm->base);
+
+ pm_runtime_enable(&pdev->dev);
+
+ return 0;
+}
+
+static int rcar_cmm_remove(struct platform_device *pdev)
+{
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+static const struct of_device_id rcar_cmm_of_table[] = {
+ { .compatible = "renesas,rcar-gen3-cmm", },
+ { .compatible = "renesas,rcar-gen2-cmm", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, rcar_cmm_of_table);
+
+static struct platform_driver rcar_cmm_platform_driver = {
+ .probe = rcar_cmm_probe,
+ .remove = rcar_cmm_remove,
+ .driver = {
+ .name = "rcar-cmm",
+ .of_match_table = rcar_cmm_of_table,
+ },
+};
+
+module_platform_driver(rcar_cmm_platform_driver);
+
+MODULE_AUTHOR("Jacopo Mondi <jacopo+renesas@jmondi.org>");
+MODULE_DESCRIPTION("Renesas R-Car CMM Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/rcar-du/rcar_cmm.h b/drivers/gpu/drm/rcar-du/rcar_cmm.h
new file mode 100644
index 000000000000..b5f7ec6db04a
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_cmm.h
@@ -0,0 +1,58 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * rcar_cmm.h -- R-Car Display Unit Color Management Module
+ *
+ * Copyright (C) 2019 Jacopo Mondi <jacopo+renesas@jmondi.org>
+ */
+
+#ifndef __RCAR_CMM_H__
+#define __RCAR_CMM_H__
+
+#define CM2_LUT_SIZE 256
+
+struct drm_color_lut;
+struct platform_device;
+
+/**
+ * struct rcar_cmm_config - CMM configuration
+ *
+ * @lut: 1D-LUT configuration
+ * @lut.table: 1D-LUT table entries. Disable LUT operations when NULL
+ */
+struct rcar_cmm_config {
+ struct {
+ struct drm_color_lut *table;
+ } lut;
+};
+
+#if IS_ENABLED(CONFIG_DRM_RCAR_CMM)
+int rcar_cmm_init(struct platform_device *pdev);
+
+int rcar_cmm_enable(struct platform_device *pdev);
+void rcar_cmm_disable(struct platform_device *pdev);
+
+int rcar_cmm_setup(struct platform_device *pdev,
+ const struct rcar_cmm_config *config);
+#else
+static inline int rcar_cmm_init(struct platform_device *pdev)
+{
+ return -ENODEV;
+}
+
+static inline int rcar_cmm_enable(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static inline void rcar_cmm_disable(struct platform_device *pdev)
+{
+}
+
+static inline int rcar_cmm_setup(struct platform_device *pdev,
+ const struct rcar_cmm_config *config)
+{
+ return 0;
+}
+#endif /* IS_ENABLED(CONFIG_DRM_RCAR_CMM) */
+
+#endif /* __RCAR_CMM_H__ */
--
2.23.0
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v7 4/7] drm: rcar-du: kms: Initialize CMM instances
@ 2019-11-13 10:05 ` Jacopo Mondi
0 siblings, 0 replies; 30+ messages in thread
From: Jacopo Mondi @ 2019-11-13 10:05 UTC (permalink / raw)
To: laurent.pinchart, kieran.bingham+renesas, geert, horms, uli+renesas
Cc: Jacopo Mondi, airlied, daniel, linux-renesas-soc, dri-devel,
linux-kernel
Implement device tree parsing to collect the available CMM instances
described by the 'renesas,cmms' property. Associate CMMs with CRTCs and
store a mask of active CMMs in the DU group for later enablement.
Enforce the probe and suspend/resume ordering of DU and CMM by creating
a stateless device link between the two.
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 6 ++
drivers/gpu/drm/rcar-du/rcar_du_crtc.h | 2 +
drivers/gpu/drm/rcar-du/rcar_du_drv.h | 2 +
drivers/gpu/drm/rcar-du/rcar_du_group.h | 2 +
drivers/gpu/drm/rcar-du/rcar_du_kms.c | 76 +++++++++++++++++++++++++
5 files changed, 88 insertions(+)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 2da46e3dc4ae..23f1d6cc1719 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -1194,6 +1194,12 @@ int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int swindex,
if (ret < 0)
return ret;
+ /* CMM might be disabled for this CRTC. */
+ if (rcdu->cmms[swindex]) {
+ rcrtc->cmm = rcdu->cmms[swindex];
+ rgrp->cmms_mask |= BIT(hwindex % 2);
+ }
+
drm_crtc_helper_add(crtc, &crtc_helper_funcs);
/* Start with vertical blanking interrupt reporting disabled. */
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
index 3b7fc668996f..5f2940c42225 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
@@ -39,6 +39,7 @@ struct rcar_du_vsp;
* @vblank_wait: wait queue used to signal vertical blanking
* @vblank_count: number of vertical blanking interrupts to wait for
* @group: CRTC group this CRTC belongs to
+ * @cmm: CMM associated with this CRTC
* @vsp: VSP feeding video to this CRTC
* @vsp_pipe: index of the VSP pipeline feeding video to this CRTC
* @writeback: the writeback connector
@@ -64,6 +65,7 @@ struct rcar_du_crtc {
unsigned int vblank_count;
struct rcar_du_group *group;
+ struct platform_device *cmm;
struct rcar_du_vsp *vsp;
unsigned int vsp_pipe;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
index 1327cd0df90a..61504c54e2ec 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
@@ -13,6 +13,7 @@
#include <linux/kernel.h>
#include <linux/wait.h>
+#include "rcar_cmm.h"
#include "rcar_du_crtc.h"
#include "rcar_du_group.h"
#include "rcar_du_vsp.h"
@@ -85,6 +86,7 @@ struct rcar_du_device {
struct rcar_du_encoder *encoders[RCAR_DU_OUTPUT_MAX];
struct rcar_du_group groups[RCAR_DU_MAX_GROUPS];
+ struct platform_device *cmms[RCAR_DU_MAX_CRTCS];
struct rcar_du_vsp vsps[RCAR_DU_MAX_VSPS];
struct {
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.h b/drivers/gpu/drm/rcar-du/rcar_du_group.h
index 87950c1f6a52..e9906609c635 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_group.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_group.h
@@ -22,6 +22,7 @@ struct rcar_du_device;
* @mmio_offset: registers offset in the device memory map
* @index: group index
* @channels_mask: bitmask of populated DU channels in this group
+ * @cmms_mask: bitmask of available CMMs in this group
* @num_crtcs: number of CRTCs in this group (1 or 2)
* @use_count: number of users of the group (rcar_du_group_(get|put))
* @used_crtcs: number of CRTCs currently in use
@@ -37,6 +38,7 @@ struct rcar_du_group {
unsigned int index;
unsigned int channels_mask;
+ unsigned int cmms_mask;
unsigned int num_crtcs;
unsigned int use_count;
unsigned int used_crtcs;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index 2dc9caee8767..7c9fb5860e54 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -17,7 +17,9 @@
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
+#include <linux/device.h>
#include <linux/of_graph.h>
+#include <linux/of_platform.h>
#include <linux/wait.h>
#include "rcar_du_crtc.h"
@@ -614,6 +616,75 @@ static int rcar_du_vsps_init(struct rcar_du_device *rcdu)
return ret;
}
+static int rcar_du_cmm_init(struct rcar_du_device *rcdu)
+{
+ const struct device_node *np = rcdu->dev->of_node;
+ unsigned int i;
+ int cells;
+
+ cells = of_property_count_u32_elems(np, "renesas,cmms");
+ if (cells == -EINVAL)
+ return 0;
+
+ if (cells > rcdu->num_crtcs) {
+ dev_err(rcdu->dev,
+ "Invalid number of entries in 'renesas,cmms'\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < cells; ++i) {
+ struct platform_device *pdev;
+ struct device_link *link;
+ struct device_node *cmm;
+ int ret;
+
+ cmm = of_parse_phandle(np, "renesas,cmms", i);
+ if (IS_ERR(cmm)) {
+ dev_err(rcdu->dev,
+ "Failed to parse 'renesas,cmms' property\n");
+ return PTR_ERR(cmm);
+ }
+
+ if (!of_device_is_available(cmm)) {
+ /* It's fine to have a phandle to a non-enabled CMM. */
+ of_node_put(cmm);
+ continue;
+ }
+
+ pdev = of_find_device_by_node(cmm);
+ if (IS_ERR(pdev)) {
+ dev_err(rcdu->dev, "No device found for CMM%u\n", i);
+ of_node_put(cmm);
+ return PTR_ERR(pdev);
+ }
+
+ of_node_put(cmm);
+
+ /*
+ * -ENODEV is used to report that the CMM config option is
+ * disabled: return 0 and let the DU continue probing.
+ */
+ ret = rcar_cmm_init(pdev);
+ if (ret)
+ return ret == -ENODEV ? 0 : ret;
+
+ /*
+ * Enforce suspend/resume ordering by making the CMM a provider
+ * of the DU: CMM is suspended after and resumed before the DU.
+ */
+ link = device_link_add(rcdu->dev, &pdev->dev, DL_FLAG_STATELESS);
+ if (!link) {
+ dev_err(rcdu->dev,
+ "Failed to create device link to CMM%u\n", i);
+ return -EINVAL;
+ }
+
+ rcdu->cmms[i] = pdev;
+ }
+
+ return 0;
+}
+
int rcar_du_modeset_init(struct rcar_du_device *rcdu)
{
static const unsigned int mmio_offsets[] = {
@@ -704,6 +775,11 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
return ret;
}
+ /* Initialize the Color Management Modules. */
+ ret = rcar_du_cmm_init(rcdu);
+ if (ret)
+ return ret;
+
/* Create the CRTCs. */
for (swindex = 0, hwindex = 0; swindex < rcdu->num_crtcs; ++hwindex) {
struct rcar_du_group *rgrp;
--
2.23.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v7 4/7] drm: rcar-du: kms: Initialize CMM instances
@ 2019-11-13 10:05 ` Jacopo Mondi
0 siblings, 0 replies; 30+ messages in thread
From: Jacopo Mondi @ 2019-11-13 10:05 UTC (permalink / raw)
To: laurent.pinchart, kieran.bingham+renesas, geert, horms, uli+renesas
Cc: airlied, linux-kernel, dri-devel, linux-renesas-soc, Jacopo Mondi
Implement device tree parsing to collect the available CMM instances
described by the 'renesas,cmms' property. Associate CMMs with CRTCs and
store a mask of active CMMs in the DU group for later enablement.
Enforce the probe and suspend/resume ordering of DU and CMM by creating
a stateless device link between the two.
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 6 ++
drivers/gpu/drm/rcar-du/rcar_du_crtc.h | 2 +
drivers/gpu/drm/rcar-du/rcar_du_drv.h | 2 +
drivers/gpu/drm/rcar-du/rcar_du_group.h | 2 +
drivers/gpu/drm/rcar-du/rcar_du_kms.c | 76 +++++++++++++++++++++++++
5 files changed, 88 insertions(+)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 2da46e3dc4ae..23f1d6cc1719 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -1194,6 +1194,12 @@ int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int swindex,
if (ret < 0)
return ret;
+ /* CMM might be disabled for this CRTC. */
+ if (rcdu->cmms[swindex]) {
+ rcrtc->cmm = rcdu->cmms[swindex];
+ rgrp->cmms_mask |= BIT(hwindex % 2);
+ }
+
drm_crtc_helper_add(crtc, &crtc_helper_funcs);
/* Start with vertical blanking interrupt reporting disabled. */
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
index 3b7fc668996f..5f2940c42225 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
@@ -39,6 +39,7 @@ struct rcar_du_vsp;
* @vblank_wait: wait queue used to signal vertical blanking
* @vblank_count: number of vertical blanking interrupts to wait for
* @group: CRTC group this CRTC belongs to
+ * @cmm: CMM associated with this CRTC
* @vsp: VSP feeding video to this CRTC
* @vsp_pipe: index of the VSP pipeline feeding video to this CRTC
* @writeback: the writeback connector
@@ -64,6 +65,7 @@ struct rcar_du_crtc {
unsigned int vblank_count;
struct rcar_du_group *group;
+ struct platform_device *cmm;
struct rcar_du_vsp *vsp;
unsigned int vsp_pipe;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
index 1327cd0df90a..61504c54e2ec 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
@@ -13,6 +13,7 @@
#include <linux/kernel.h>
#include <linux/wait.h>
+#include "rcar_cmm.h"
#include "rcar_du_crtc.h"
#include "rcar_du_group.h"
#include "rcar_du_vsp.h"
@@ -85,6 +86,7 @@ struct rcar_du_device {
struct rcar_du_encoder *encoders[RCAR_DU_OUTPUT_MAX];
struct rcar_du_group groups[RCAR_DU_MAX_GROUPS];
+ struct platform_device *cmms[RCAR_DU_MAX_CRTCS];
struct rcar_du_vsp vsps[RCAR_DU_MAX_VSPS];
struct {
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.h b/drivers/gpu/drm/rcar-du/rcar_du_group.h
index 87950c1f6a52..e9906609c635 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_group.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_group.h
@@ -22,6 +22,7 @@ struct rcar_du_device;
* @mmio_offset: registers offset in the device memory map
* @index: group index
* @channels_mask: bitmask of populated DU channels in this group
+ * @cmms_mask: bitmask of available CMMs in this group
* @num_crtcs: number of CRTCs in this group (1 or 2)
* @use_count: number of users of the group (rcar_du_group_(get|put))
* @used_crtcs: number of CRTCs currently in use
@@ -37,6 +38,7 @@ struct rcar_du_group {
unsigned int index;
unsigned int channels_mask;
+ unsigned int cmms_mask;
unsigned int num_crtcs;
unsigned int use_count;
unsigned int used_crtcs;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index 2dc9caee8767..7c9fb5860e54 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -17,7 +17,9 @@
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
+#include <linux/device.h>
#include <linux/of_graph.h>
+#include <linux/of_platform.h>
#include <linux/wait.h>
#include "rcar_du_crtc.h"
@@ -614,6 +616,75 @@ static int rcar_du_vsps_init(struct rcar_du_device *rcdu)
return ret;
}
+static int rcar_du_cmm_init(struct rcar_du_device *rcdu)
+{
+ const struct device_node *np = rcdu->dev->of_node;
+ unsigned int i;
+ int cells;
+
+ cells = of_property_count_u32_elems(np, "renesas,cmms");
+ if (cells == -EINVAL)
+ return 0;
+
+ if (cells > rcdu->num_crtcs) {
+ dev_err(rcdu->dev,
+ "Invalid number of entries in 'renesas,cmms'\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < cells; ++i) {
+ struct platform_device *pdev;
+ struct device_link *link;
+ struct device_node *cmm;
+ int ret;
+
+ cmm = of_parse_phandle(np, "renesas,cmms", i);
+ if (IS_ERR(cmm)) {
+ dev_err(rcdu->dev,
+ "Failed to parse 'renesas,cmms' property\n");
+ return PTR_ERR(cmm);
+ }
+
+ if (!of_device_is_available(cmm)) {
+ /* It's fine to have a phandle to a non-enabled CMM. */
+ of_node_put(cmm);
+ continue;
+ }
+
+ pdev = of_find_device_by_node(cmm);
+ if (IS_ERR(pdev)) {
+ dev_err(rcdu->dev, "No device found for CMM%u\n", i);
+ of_node_put(cmm);
+ return PTR_ERR(pdev);
+ }
+
+ of_node_put(cmm);
+
+ /*
+ * -ENODEV is used to report that the CMM config option is
+ * disabled: return 0 and let the DU continue probing.
+ */
+ ret = rcar_cmm_init(pdev);
+ if (ret)
+ return ret == -ENODEV ? 0 : ret;
+
+ /*
+ * Enforce suspend/resume ordering by making the CMM a provider
+ * of the DU: CMM is suspended after and resumed before the DU.
+ */
+ link = device_link_add(rcdu->dev, &pdev->dev, DL_FLAG_STATELESS);
+ if (!link) {
+ dev_err(rcdu->dev,
+ "Failed to create device link to CMM%u\n", i);
+ return -EINVAL;
+ }
+
+ rcdu->cmms[i] = pdev;
+ }
+
+ return 0;
+}
+
int rcar_du_modeset_init(struct rcar_du_device *rcdu)
{
static const unsigned int mmio_offsets[] = {
@@ -704,6 +775,11 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
return ret;
}
+ /* Initialize the Color Management Modules. */
+ ret = rcar_du_cmm_init(rcdu);
+ if (ret)
+ return ret;
+
/* Create the CRTCs. */
for (swindex = 0, hwindex = 0; swindex < rcdu->num_crtcs; ++hwindex) {
struct rcar_du_group *rgrp;
--
2.23.0
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v7 5/7] drm: rcar-du: crtc: Control CMM operations
@ 2019-11-13 10:05 ` Jacopo Mondi
0 siblings, 0 replies; 30+ messages in thread
From: Jacopo Mondi @ 2019-11-13 10:05 UTC (permalink / raw)
To: laurent.pinchart, kieran.bingham+renesas, geert, horms, uli+renesas
Cc: Jacopo Mondi, airlied, daniel, linux-renesas-soc, dri-devel,
linux-kernel
Implement CMM handling in the crtc begin and enable atomic callbacks,
and enable CMM unit through the Display Extensional Functions
register at group setup time.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
v6 -> v7
- Drop check for CMM in rcar_du_cmm_check as if the gamma_table property is
available, a CMM unit for this CRTC was registered
- Add TODO note to investigate how the activation order of CMM and CRTC
impact on the first displayed fram
---
---
drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 61 +++++++++++++++++++++++++
drivers/gpu/drm/rcar-du/rcar_du_group.c | 10 ++++
drivers/gpu/drm/rcar-du/rcar_du_regs.h | 5 ++
3 files changed, 76 insertions(+)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 23f1d6cc1719..3f0f16946f42 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -21,6 +21,7 @@
#include <drm/drm_plane_helper.h>
#include <drm/drm_vblank.h>
+#include "rcar_cmm.h"
#include "rcar_du_crtc.h"
#include "rcar_du_drv.h"
#include "rcar_du_encoder.h"
@@ -474,6 +475,45 @@ static void rcar_du_crtc_wait_page_flip(struct rcar_du_crtc *rcrtc)
rcar_du_crtc_finish_page_flip(rcrtc);
}
+/* -----------------------------------------------------------------------------
+ * Color Management Module (CMM)
+ */
+
+static int rcar_du_cmm_check(struct drm_crtc *crtc,
+ struct drm_crtc_state *state)
+{
+ struct drm_property_blob *drm_lut = state->gamma_lut;
+ struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
+ struct device *dev = rcrtc->dev->dev;
+
+ if (!drm_lut)
+ return 0;
+
+ /* We only accept fully populated LUT tables. */
+ if (drm_color_lut_size(drm_lut) != CM2_LUT_SIZE) {
+ dev_err(dev, "invalid gamma lut size: %lu bytes\n",
+ drm_lut->length);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void rcar_du_cmm_setup(struct drm_crtc *crtc)
+{
+ struct drm_property_blob *drm_lut = crtc->state->gamma_lut;
+ struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
+ struct rcar_cmm_config cmm_config = {};
+
+ if (!rcrtc->cmm)
+ return;
+
+ if (drm_lut)
+ cmm_config.lut.table = (struct drm_color_lut *)drm_lut->data;
+
+ rcar_cmm_setup(rcrtc->cmm, &cmm_config);
+}
+
/* -----------------------------------------------------------------------------
* Start/Stop and Suspend/Resume
*/
@@ -619,6 +659,9 @@ static void rcar_du_crtc_stop(struct rcar_du_crtc *rcrtc)
if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
rcar_du_vsp_disable(rcrtc);
+ if (rcrtc->cmm)
+ rcar_cmm_disable(rcrtc->cmm);
+
/*
* Select switch sync mode. This stops display operation and configures
* the HSYNC and VSYNC signals as inputs.
@@ -642,6 +685,11 @@ static int rcar_du_crtc_atomic_check(struct drm_crtc *crtc,
{
struct rcar_du_crtc_state *rstate = to_rcar_crtc_state(state);
struct drm_encoder *encoder;
+ int ret;
+
+ ret = rcar_du_cmm_check(crtc, state);
+ if (ret)
+ return ret;
/* Store the routes from the CRTC output to the DU outputs. */
rstate->outputs = 0;
@@ -667,6 +715,8 @@ static void rcar_du_crtc_atomic_enable(struct drm_crtc *crtc,
struct rcar_du_crtc_state *rstate = to_rcar_crtc_state(crtc->state);
struct rcar_du_device *rcdu = rcrtc->dev;
+ if (rcrtc->cmm)
+ rcar_cmm_enable(rcrtc->cmm);
rcar_du_crtc_get(rcrtc);
/*
@@ -686,6 +736,13 @@ static void rcar_du_crtc_atomic_enable(struct drm_crtc *crtc,
}
rcar_du_crtc_start(rcrtc);
+
+ /*
+ * TODO: The chip manual indicates that CMM tables should be written
+ * after the DU channel has been activated. Investigate the impact
+ * of this restriction on the first displayed frame.
+ */
+ rcar_du_cmm_setup(crtc);
}
static void rcar_du_crtc_atomic_disable(struct drm_crtc *crtc,
@@ -739,6 +796,10 @@ static void rcar_du_crtc_atomic_begin(struct drm_crtc *crtc,
*/
rcar_du_crtc_get(rcrtc);
+ /* If the active state changed, we let .atomic_enable handle CMM. */
+ if (crtc->state->color_mgmt_changed && !crtc->state->active_changed)
+ rcar_du_cmm_setup(crtc);
+
if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
rcar_du_vsp_atomic_begin(rcrtc);
}
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.c b/drivers/gpu/drm/rcar-du/rcar_du_group.c
index 9eee47969e77..88a783ceb3e9 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_group.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_group.c
@@ -135,6 +135,7 @@ static void rcar_du_group_setup_didsr(struct rcar_du_group *rgrp)
static void rcar_du_group_setup(struct rcar_du_group *rgrp)
{
struct rcar_du_device *rcdu = rgrp->dev;
+ u32 defr7 = DEFR7_CODE;
/* Enable extended features */
rcar_du_group_write(rgrp, DEFR, DEFR_CODE | DEFR_DEFE);
@@ -147,6 +148,15 @@ static void rcar_du_group_setup(struct rcar_du_group *rgrp)
rcar_du_group_setup_pins(rgrp);
+ /*
+ * TODO: Handle routing of the DU output to CMM dynamically, as we
+ * should bypass CMM completely when no color management feature is
+ * used.
+ */
+ defr7 |= (rgrp->cmms_mask & BIT(1) ? DEFR7_CMME1 : 0) |
+ (rgrp->cmms_mask & BIT(0) ? DEFR7_CMME0 : 0);
+ rcar_du_group_write(rgrp, DEFR7, defr7);
+
if (rcdu->info->gen >= 2) {
rcar_du_group_setup_defr8(rgrp);
rcar_du_group_setup_didsr(rgrp);
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_regs.h b/drivers/gpu/drm/rcar-du/rcar_du_regs.h
index bc87f080b170..fb9964949368 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_regs.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_regs.h
@@ -197,6 +197,11 @@
#define DEFR6_MLOS1 (1 << 2)
#define DEFR6_DEFAULT (DEFR6_CODE | DEFR6_TCNE1)
+#define DEFR7 0x000ec
+#define DEFR7_CODE (0x7779 << 16)
+#define DEFR7_CMME1 BIT(6)
+#define DEFR7_CMME0 BIT(4)
+
/* -----------------------------------------------------------------------------
* R8A7790-only Control Registers
*/
--
2.23.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v7 5/7] drm: rcar-du: crtc: Control CMM operations
@ 2019-11-13 10:05 ` Jacopo Mondi
0 siblings, 0 replies; 30+ messages in thread
From: Jacopo Mondi @ 2019-11-13 10:05 UTC (permalink / raw)
To: laurent.pinchart, kieran.bingham+renesas, geert, horms, uli+renesas
Cc: airlied, linux-kernel, dri-devel, linux-renesas-soc, Jacopo Mondi
Implement CMM handling in the crtc begin and enable atomic callbacks,
and enable CMM unit through the Display Extensional Functions
register at group setup time.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
v6 -> v7
- Drop check for CMM in rcar_du_cmm_check as if the gamma_table property is
available, a CMM unit for this CRTC was registered
- Add TODO note to investigate how the activation order of CMM and CRTC
impact on the first displayed fram
---
---
drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 61 +++++++++++++++++++++++++
drivers/gpu/drm/rcar-du/rcar_du_group.c | 10 ++++
drivers/gpu/drm/rcar-du/rcar_du_regs.h | 5 ++
3 files changed, 76 insertions(+)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 23f1d6cc1719..3f0f16946f42 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -21,6 +21,7 @@
#include <drm/drm_plane_helper.h>
#include <drm/drm_vblank.h>
+#include "rcar_cmm.h"
#include "rcar_du_crtc.h"
#include "rcar_du_drv.h"
#include "rcar_du_encoder.h"
@@ -474,6 +475,45 @@ static void rcar_du_crtc_wait_page_flip(struct rcar_du_crtc *rcrtc)
rcar_du_crtc_finish_page_flip(rcrtc);
}
+/* -----------------------------------------------------------------------------
+ * Color Management Module (CMM)
+ */
+
+static int rcar_du_cmm_check(struct drm_crtc *crtc,
+ struct drm_crtc_state *state)
+{
+ struct drm_property_blob *drm_lut = state->gamma_lut;
+ struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
+ struct device *dev = rcrtc->dev->dev;
+
+ if (!drm_lut)
+ return 0;
+
+ /* We only accept fully populated LUT tables. */
+ if (drm_color_lut_size(drm_lut) != CM2_LUT_SIZE) {
+ dev_err(dev, "invalid gamma lut size: %lu bytes\n",
+ drm_lut->length);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void rcar_du_cmm_setup(struct drm_crtc *crtc)
+{
+ struct drm_property_blob *drm_lut = crtc->state->gamma_lut;
+ struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
+ struct rcar_cmm_config cmm_config = {};
+
+ if (!rcrtc->cmm)
+ return;
+
+ if (drm_lut)
+ cmm_config.lut.table = (struct drm_color_lut *)drm_lut->data;
+
+ rcar_cmm_setup(rcrtc->cmm, &cmm_config);
+}
+
/* -----------------------------------------------------------------------------
* Start/Stop and Suspend/Resume
*/
@@ -619,6 +659,9 @@ static void rcar_du_crtc_stop(struct rcar_du_crtc *rcrtc)
if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
rcar_du_vsp_disable(rcrtc);
+ if (rcrtc->cmm)
+ rcar_cmm_disable(rcrtc->cmm);
+
/*
* Select switch sync mode. This stops display operation and configures
* the HSYNC and VSYNC signals as inputs.
@@ -642,6 +685,11 @@ static int rcar_du_crtc_atomic_check(struct drm_crtc *crtc,
{
struct rcar_du_crtc_state *rstate = to_rcar_crtc_state(state);
struct drm_encoder *encoder;
+ int ret;
+
+ ret = rcar_du_cmm_check(crtc, state);
+ if (ret)
+ return ret;
/* Store the routes from the CRTC output to the DU outputs. */
rstate->outputs = 0;
@@ -667,6 +715,8 @@ static void rcar_du_crtc_atomic_enable(struct drm_crtc *crtc,
struct rcar_du_crtc_state *rstate = to_rcar_crtc_state(crtc->state);
struct rcar_du_device *rcdu = rcrtc->dev;
+ if (rcrtc->cmm)
+ rcar_cmm_enable(rcrtc->cmm);
rcar_du_crtc_get(rcrtc);
/*
@@ -686,6 +736,13 @@ static void rcar_du_crtc_atomic_enable(struct drm_crtc *crtc,
}
rcar_du_crtc_start(rcrtc);
+
+ /*
+ * TODO: The chip manual indicates that CMM tables should be written
+ * after the DU channel has been activated. Investigate the impact
+ * of this restriction on the first displayed frame.
+ */
+ rcar_du_cmm_setup(crtc);
}
static void rcar_du_crtc_atomic_disable(struct drm_crtc *crtc,
@@ -739,6 +796,10 @@ static void rcar_du_crtc_atomic_begin(struct drm_crtc *crtc,
*/
rcar_du_crtc_get(rcrtc);
+ /* If the active state changed, we let .atomic_enable handle CMM. */
+ if (crtc->state->color_mgmt_changed && !crtc->state->active_changed)
+ rcar_du_cmm_setup(crtc);
+
if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
rcar_du_vsp_atomic_begin(rcrtc);
}
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.c b/drivers/gpu/drm/rcar-du/rcar_du_group.c
index 9eee47969e77..88a783ceb3e9 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_group.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_group.c
@@ -135,6 +135,7 @@ static void rcar_du_group_setup_didsr(struct rcar_du_group *rgrp)
static void rcar_du_group_setup(struct rcar_du_group *rgrp)
{
struct rcar_du_device *rcdu = rgrp->dev;
+ u32 defr7 = DEFR7_CODE;
/* Enable extended features */
rcar_du_group_write(rgrp, DEFR, DEFR_CODE | DEFR_DEFE);
@@ -147,6 +148,15 @@ static void rcar_du_group_setup(struct rcar_du_group *rgrp)
rcar_du_group_setup_pins(rgrp);
+ /*
+ * TODO: Handle routing of the DU output to CMM dynamically, as we
+ * should bypass CMM completely when no color management feature is
+ * used.
+ */
+ defr7 |= (rgrp->cmms_mask & BIT(1) ? DEFR7_CMME1 : 0) |
+ (rgrp->cmms_mask & BIT(0) ? DEFR7_CMME0 : 0);
+ rcar_du_group_write(rgrp, DEFR7, defr7);
+
if (rcdu->info->gen >= 2) {
rcar_du_group_setup_defr8(rgrp);
rcar_du_group_setup_didsr(rgrp);
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_regs.h b/drivers/gpu/drm/rcar-du/rcar_du_regs.h
index bc87f080b170..fb9964949368 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_regs.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_regs.h
@@ -197,6 +197,11 @@
#define DEFR6_MLOS1 (1 << 2)
#define DEFR6_DEFAULT (DEFR6_CODE | DEFR6_TCNE1)
+#define DEFR7 0x000ec
+#define DEFR7_CODE (0x7779 << 16)
+#define DEFR7_CMME1 BIT(6)
+#define DEFR7_CMME0 BIT(4)
+
/* -----------------------------------------------------------------------------
* R8A7790-only Control Registers
*/
--
2.23.0
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dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v7 6/7] drm: rcar-du: crtc: Register GAMMA_LUT properties
@ 2019-11-13 10:05 ` Jacopo Mondi
0 siblings, 0 replies; 30+ messages in thread
From: Jacopo Mondi @ 2019-11-13 10:05 UTC (permalink / raw)
To: laurent.pinchart, kieran.bingham+renesas, geert, horms, uli+renesas
Cc: Jacopo Mondi, airlied, daniel, linux-renesas-soc, dri-devel,
linux-kernel
Enable the GAMMA_LUT KMS property using the framework helpers to
register the property and set the associated gamma table maximum size.
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Ulrich Hecht <uli+renesas@fpond.eu>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 3f0f16946f42..e12ce9c8923b 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -1136,6 +1136,7 @@ static const struct drm_crtc_funcs crtc_funcs_gen3 = {
.set_crc_source = rcar_du_crtc_set_crc_source,
.verify_crc_source = rcar_du_crtc_verify_crc_source,
.get_crc_sources = rcar_du_crtc_get_crc_sources,
+ .gamma_set = drm_atomic_helper_legacy_gamma_set,
};
/* -----------------------------------------------------------------------------
@@ -1259,6 +1260,9 @@ int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int swindex,
if (rcdu->cmms[swindex]) {
rcrtc->cmm = rcdu->cmms[swindex];
rgrp->cmms_mask |= BIT(hwindex % 2);
+
+ drm_mode_crtc_set_gamma_size(crtc, CM2_LUT_SIZE);
+ drm_crtc_enable_color_mgmt(crtc, 0, false, CM2_LUT_SIZE);
}
drm_crtc_helper_add(crtc, &crtc_helper_funcs);
--
2.23.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v7 6/7] drm: rcar-du: crtc: Register GAMMA_LUT properties
@ 2019-11-13 10:05 ` Jacopo Mondi
0 siblings, 0 replies; 30+ messages in thread
From: Jacopo Mondi @ 2019-11-13 10:05 UTC (permalink / raw)
To: laurent.pinchart, kieran.bingham+renesas, geert, horms, uli+renesas
Cc: airlied, linux-kernel, dri-devel, linux-renesas-soc, Jacopo Mondi
Enable the GAMMA_LUT KMS property using the framework helpers to
register the property and set the associated gamma table maximum size.
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Ulrich Hecht <uli+renesas@fpond.eu>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 3f0f16946f42..e12ce9c8923b 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -1136,6 +1136,7 @@ static const struct drm_crtc_funcs crtc_funcs_gen3 = {
.set_crc_source = rcar_du_crtc_set_crc_source,
.verify_crc_source = rcar_du_crtc_verify_crc_source,
.get_crc_sources = rcar_du_crtc_get_crc_sources,
+ .gamma_set = drm_atomic_helper_legacy_gamma_set,
};
/* -----------------------------------------------------------------------------
@@ -1259,6 +1260,9 @@ int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int swindex,
if (rcdu->cmms[swindex]) {
rcrtc->cmm = rcdu->cmms[swindex];
rgrp->cmms_mask |= BIT(hwindex % 2);
+
+ drm_mode_crtc_set_gamma_size(crtc, CM2_LUT_SIZE);
+ drm_crtc_enable_color_mgmt(crtc, 0, false, CM2_LUT_SIZE);
}
drm_crtc_helper_add(crtc, &crtc_helper_funcs);
--
2.23.0
_______________________________________________
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dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v7 7/7] drm: rcar-du: kms: Expand comment in vsps parsing routine
@ 2019-11-13 10:05 ` Jacopo Mondi
0 siblings, 0 replies; 30+ messages in thread
From: Jacopo Mondi @ 2019-11-13 10:05 UTC (permalink / raw)
To: laurent.pinchart, kieran.bingham+renesas, geert, horms, uli+renesas
Cc: Jacopo Mondi, airlied, daniel, linux-renesas-soc, dri-devel,
linux-kernel
Expand comment in the 'vsps' parsing routine to specify the LIF
channel index defaults to 0 in case the second cell of the property
is not specified to remain compatible with older DT bindings.
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
drivers/gpu/drm/rcar-du/rcar_du_kms.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index 7c9fb5860e54..186422ac552b 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -587,7 +587,11 @@ static int rcar_du_vsps_init(struct rcar_du_device *rcdu)
vsps[j].crtcs_mask |= BIT(i);
- /* Store the VSP pointer and pipe index in the CRTC. */
+ /*
+ * Store the VSP pointer and pipe index in the CRTC. If the
+ * second cell of the 'vsps' specifier isn't present, default
+ * to 0 to remain compatible with older DT bindings.
+ */
rcdu->crtcs[i].vsp = &rcdu->vsps[j];
rcdu->crtcs[i].vsp_pipe = cells >= 1 ? args.args[0] : 0;
}
--
2.23.0
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v7 7/7] drm: rcar-du: kms: Expand comment in vsps parsing routine
@ 2019-11-13 10:05 ` Jacopo Mondi
0 siblings, 0 replies; 30+ messages in thread
From: Jacopo Mondi @ 2019-11-13 10:05 UTC (permalink / raw)
To: laurent.pinchart, kieran.bingham+renesas, geert, horms, uli+renesas
Cc: airlied, linux-kernel, dri-devel, linux-renesas-soc, Jacopo Mondi
Expand comment in the 'vsps' parsing routine to specify the LIF
channel index defaults to 0 in case the second cell of the property
is not specified to remain compatible with older DT bindings.
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
drivers/gpu/drm/rcar-du/rcar_du_kms.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index 7c9fb5860e54..186422ac552b 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -587,7 +587,11 @@ static int rcar_du_vsps_init(struct rcar_du_device *rcdu)
vsps[j].crtcs_mask |= BIT(i);
- /* Store the VSP pointer and pipe index in the CRTC. */
+ /*
+ * Store the VSP pointer and pipe index in the CRTC. If the
+ * second cell of the 'vsps' specifier isn't present, default
+ * to 0 to remain compatible with older DT bindings.
+ */
rcdu->crtcs[i].vsp = &rcdu->vsps[j];
rcdu->crtcs[i].vsp_pipe = cells >= 1 ? args.args[0] : 0;
}
--
2.23.0
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https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 30+ messages in thread
* Re: [PATCH v7 2/7] dt-bindings: display, renesas,du: Document cmms property
@ 2019-11-13 13:34 ` Geert Uytterhoeven
0 siblings, 0 replies; 30+ messages in thread
From: Geert Uytterhoeven @ 2019-11-13 13:34 UTC (permalink / raw)
To: Jacopo Mondi
Cc: Laurent Pinchart, Kieran Bingham, Simon Horman, Ulrich Hecht,
David Airlie, Daniel Vetter, Linux-Renesas, DRI Development,
Linux Kernel Mailing List, Rob Herring
Hi Jacopo,
Sorry for spoiling your v7 ;-)
On Wed, Nov 13, 2019 at 11:04 AM Jacopo Mondi <jacopo+renesas@jmondi.org> wrote:
> Document the newly added 'cmms' property which accepts a list of phandle
renesas,cmms
> and channel index pairs that point to the CMM units available for each
> Display Unit output video channel.
>
> Reviewed-by: Rob Herring <robh@kernel.org>
> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v7 2/7] dt-bindings: display, renesas, du: Document cmms property
@ 2019-11-13 13:34 ` Geert Uytterhoeven
0 siblings, 0 replies; 30+ messages in thread
From: Geert Uytterhoeven @ 2019-11-13 13:34 UTC (permalink / raw)
To: Jacopo Mondi
Cc: Simon Horman, David Airlie, Linux Kernel Mailing List,
DRI Development, Linux-Renesas, Kieran Bingham, Laurent Pinchart,
Ulrich Hecht
Hi Jacopo,
Sorry for spoiling your v7 ;-)
On Wed, Nov 13, 2019 at 11:04 AM Jacopo Mondi <jacopo+renesas@jmondi.org> wrote:
> Document the newly added 'cmms' property which accepts a list of phandle
renesas,cmms
> and channel index pairs that point to the CMM units available for each
> Display Unit output video channel.
>
> Reviewed-by: Rob Herring <robh@kernel.org>
> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
_______________________________________________
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dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v7 2/7] dt-bindings: display, renesas,du: Document cmms property
2019-11-13 13:34 ` [PATCH v7 2/7] dt-bindings: display, renesas, du: " Geert Uytterhoeven
@ 2019-11-28 1:50 ` Laurent Pinchart
-1 siblings, 0 replies; 30+ messages in thread
From: Laurent Pinchart @ 2019-11-28 1:50 UTC (permalink / raw)
To: Geert Uytterhoeven
Cc: Jacopo Mondi, Kieran Bingham, Simon Horman, Ulrich Hecht,
David Airlie, Daniel Vetter, Linux-Renesas, DRI Development,
Linux Kernel Mailing List, Rob Herring
On Wed, Nov 13, 2019 at 02:34:27PM +0100, Geert Uytterhoeven wrote:
> Hi Jacopo,
>
> Sorry for spoiling your v7 ;-)
>
> On Wed, Nov 13, 2019 at 11:04 AM Jacopo Mondi <jacopo+renesas@jmondi.org> wrote:
> > Document the newly added 'cmms' property which accepts a list of phandle
>
> renesas,cmms
Fix applied to my branch.
> > and channel index pairs that point to the CMM units available for each
> > Display Unit output video channel.
> >
> > Reviewed-by: Rob Herring <robh@kernel.org>
> > Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v7 2/7] dt-bindings: display, renesas,du: Document cmms property
@ 2019-11-28 1:50 ` Laurent Pinchart
0 siblings, 0 replies; 30+ messages in thread
From: Laurent Pinchart @ 2019-11-28 1:50 UTC (permalink / raw)
To: Geert Uytterhoeven
Cc: Simon Horman, David Airlie, Linux Kernel Mailing List,
DRI Development, Linux-Renesas, Kieran Bingham, Jacopo Mondi,
Ulrich Hecht
On Wed, Nov 13, 2019 at 02:34:27PM +0100, Geert Uytterhoeven wrote:
> Hi Jacopo,
>
> Sorry for spoiling your v7 ;-)
>
> On Wed, Nov 13, 2019 at 11:04 AM Jacopo Mondi <jacopo+renesas@jmondi.org> wrote:
> > Document the newly added 'cmms' property which accepts a list of phandle
>
> renesas,cmms
Fix applied to my branch.
> > and channel index pairs that point to the CMM units available for each
> > Display Unit output video channel.
> >
> > Reviewed-by: Rob Herring <robh@kernel.org>
> > Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
--
Regards,
Laurent Pinchart
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v7 3/7] drm: rcar-du: Add support for CMM
@ 2019-11-28 1:52 ` Laurent Pinchart
0 siblings, 0 replies; 30+ messages in thread
From: Laurent Pinchart @ 2019-11-28 1:52 UTC (permalink / raw)
To: Jacopo Mondi
Cc: kieran.bingham+renesas, geert, horms, uli+renesas, airlied,
daniel, linux-renesas-soc, dri-devel, linux-kernel
Hi Jacopo,
Thank you for the patch.
On Wed, Nov 13, 2019 at 11:05:52AM +0100, Jacopo Mondi wrote:
> Add a driver for the R-Car Display Unit Color Correction Module.
>
> In most of Gen3 SoCs, each DU output channel is provided with a CMM unit
> to perform image enhancement and color correction.
>
> Add support for CMM through a driver that supports configuration of
> the 1-dimensional LUT table. More advanced CMM features will be
> implemented on top of this initial one.
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
>
> ---
> v6 -> v7
> - Expand rcar_cmm_setup() function documentation to detail its relationship
> with rcar_cmm_enable() and their call order precedence.
>
> - Kconfig update: Make DRM_RCAR_CMM a tristate option and 'imply' it from the
> RCAR_DU one. This guarantees that if DU is built as a module CMM can only be
> built as a module as well. At the same time, if DU is built-in, CMM can
> be built-in only.
> ---
> drivers/gpu/drm/rcar-du/Kconfig | 8 ++
> drivers/gpu/drm/rcar-du/Makefile | 1 +
> drivers/gpu/drm/rcar-du/rcar_cmm.c | 217 +++++++++++++++++++++++++++++
> drivers/gpu/drm/rcar-du/rcar_cmm.h | 58 ++++++++
> 4 files changed, 284 insertions(+)
> create mode 100644 drivers/gpu/drm/rcar-du/rcar_cmm.c
> create mode 100644 drivers/gpu/drm/rcar-du/rcar_cmm.h
>
> diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig
> index 1529849e217e..6ed7a4f3c44e 100644
> --- a/drivers/gpu/drm/rcar-du/Kconfig
> +++ b/drivers/gpu/drm/rcar-du/Kconfig
> @@ -5,6 +5,7 @@ config DRM_RCAR_DU
> depends on ARM || ARM64
> depends on ARCH_RENESAS || COMPILE_TEST
> imply DRM_RCAR_LVDS
> + imply DRM_RCAR_CMM
I'll swap those two lines.
> select DRM_KMS_HELPER
> select DRM_KMS_CMA_HELPER
> select DRM_GEM_CMA_HELPER
> @@ -13,6 +14,13 @@ config DRM_RCAR_DU
> Choose this option if you have an R-Car chipset.
> If M is selected the module will be called rcar-du-drm.
>
> +config DRM_RCAR_CMM
> + tristate "R-Car DU Color Management Module (CMM) Support"
> + depends on DRM && OF
> + depends on DRM_RCAR_DU
I just wanted to point out that this prevents DRM_RCAR_DU=m and
DRM_RCAR_CMM=y, but I don't think that is a useful use case.
> + help
> + Enable support for R-Car Color Management Module (CMM).
> +
> config DRM_RCAR_DW_HDMI
> tristate "R-Car DU Gen3 HDMI Encoder Support"
> depends on DRM && OF
> diff --git a/drivers/gpu/drm/rcar-du/Makefile b/drivers/gpu/drm/rcar-du/Makefile
> index 6c2ed9c46467..4d1187ccc3e5 100644
> --- a/drivers/gpu/drm/rcar-du/Makefile
> +++ b/drivers/gpu/drm/rcar-du/Makefile
> @@ -15,6 +15,7 @@ rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS) += rcar_du_of.o \
> rcar-du-drm-$(CONFIG_DRM_RCAR_VSP) += rcar_du_vsp.o
> rcar-du-drm-$(CONFIG_DRM_RCAR_WRITEBACK) += rcar_du_writeback.o
>
> +obj-$(CONFIG_DRM_RCAR_CMM) += rcar_cmm.o
> obj-$(CONFIG_DRM_RCAR_DU) += rcar-du-drm.o
> obj-$(CONFIG_DRM_RCAR_DW_HDMI) += rcar_dw_hdmi.o
> obj-$(CONFIG_DRM_RCAR_LVDS) += rcar_lvds.o
> diff --git a/drivers/gpu/drm/rcar-du/rcar_cmm.c b/drivers/gpu/drm/rcar-du/rcar_cmm.c
> new file mode 100644
> index 000000000000..c578095b09a5
> --- /dev/null
> +++ b/drivers/gpu/drm/rcar-du/rcar_cmm.c
> @@ -0,0 +1,217 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * rcar_cmm.c -- R-Car Display Unit Color Management Module
> + *
> + * Copyright (C) 2019 Jacopo Mondi <jacopo+renesas@jmondi.org>
> + */
> +
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +
> +#include <drm/drm_color_mgmt.h>
> +
> +#include "rcar_cmm.h"
> +
> +#define CM2_LUT_CTRL 0x0000
> +#define CM2_LUT_CTRL_LUT_EN BIT(0)
> +#define CM2_LUT_TBL_BASE 0x0600
> +#define CM2_LUT_TBL(__i) (CM2_LUT_TBL_BASE + (__i) * 4)
> +
> +struct rcar_cmm {
> + void __iomem *base;
> +
> + /*
> + * @lut: 1D-LUT state
> + * @lut.enabled: 1D-LUT enabled flag
> + */
> + struct {
> + bool enabled;
> + } lut;
> +};
> +
> +static inline int rcar_cmm_read(struct rcar_cmm *rcmm, u32 reg)
> +{
> + return ioread32(rcmm->base + reg);
> +}
> +
> +static inline void rcar_cmm_write(struct rcar_cmm *rcmm, u32 reg, u32 data)
> +{
> + iowrite32(data, rcmm->base + reg);
> +}
> +
> +/*
> + * rcar_cmm_lut_write() - Scale the DRM LUT table entries to hardware precision
> + * and write to the CMM registers
> + * @rcmm: Pointer to the CMM device
> + * @drm_lut: Pointer to the DRM LUT table
> + */
> +static void rcar_cmm_lut_write(struct rcar_cmm *rcmm,
> + const struct drm_color_lut *drm_lut)
> +{
> + unsigned int i;
> +
> + for (i = 0; i < CM2_LUT_SIZE; ++i) {
> + u32 entry = drm_color_lut_extract(drm_lut[i].red, 8) << 16
> + | drm_color_lut_extract(drm_lut[i].green, 8) << 8
> + | drm_color_lut_extract(drm_lut[i].blue, 8);
> +
> + rcar_cmm_write(rcmm, CM2_LUT_TBL(i), entry);
> + }
> +}
> +
> +/*
> + * rcar_cmm_setup() - Configure the CMM unit
> + * @pdev: The platform device associated with the CMM instance
> + * @config: The CMM unit configuration
> + *
> + * Configure the CMM unit with the given configuration. Currently enabling,
> + * disabling and programming of the 1-D LUT unit is supported.
> + *
> + * As rcar_cmm_setup() accesses the CMM registers the unit should be powered
> + * and its functional clock enabled. To guarantee this, before any call to
> + * this function is made, the CMM unit has to be enabled by calling
> + * rcar_cmm_enable() first.
> + *
> + * TODO: Add support for LUT double buffer operations to avoid updating the
> + * LUT table entries while a frame is being displayed.
> + */
> +int rcar_cmm_setup(struct platform_device *pdev,
> + const struct rcar_cmm_config *config)
> +{
> + struct rcar_cmm *rcmm = platform_get_drvdata(pdev);
> +
> + /* Disable LUT if no table is provided. */
> + if (!config->lut.table) {
> + if (rcmm->lut.enabled) {
> + rcar_cmm_write(rcmm, CM2_LUT_CTRL, 0);
> + rcmm->lut.enabled = false;
> + }
> +
> + return 0;
> + }
> +
> + /* Enable LUT and program the new gamma table values. */
> + if (!rcmm->lut.enabled) {
> + rcar_cmm_write(rcmm, CM2_LUT_CTRL, CM2_LUT_CTRL_LUT_EN);
> + rcmm->lut.enabled = true;
> + }
> +
> + rcar_cmm_lut_write(rcmm, config->lut.table);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(rcar_cmm_setup);
> +
> +/*
> + * rcar_cmm_enable() - Enable the CMM unit
> + * @pdev: The platform device associated with the CMM instance
> + *
> + * When the output of the corresponding DU channel is routed to the CMM unit,
> + * the unit shall be enabled before the DU channel is started, and remain
> + * enabled until the channel is stopped. The CMM unit shall be disabled with
> + * rcar_cmm_disable().
> + *
> + * Calls to rcar_cmm_enable() and rcar_cmm_disable() are not reference-counted.
> + * It is an error to attempt to enable an already enabled CMM unit, or to
> + * attempt to disable a disabled unit.
> + */
> +int rcar_cmm_enable(struct platform_device *pdev)
> +{
> + int ret;
> +
> + ret = pm_runtime_get_sync(&pdev->dev);
> + if (ret < 0)
> + return ret;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(rcar_cmm_enable);
> +
> +/*
> + * rcar_cmm_disable() - Disable the CMM unit
> + * @pdev: The platform device associated with the CMM instance
> + *
> + * See rcar_cmm_enable() for usage information.
> + *
> + * Disabling the CMM unit disable all the internal processing blocks. The CMM
> + * state shall thus be restored with rcar_cmm_setup() when re-enabling the CMM
> + * unit after the next rcar_cmm_enable() call.
> + */
> +void rcar_cmm_disable(struct platform_device *pdev)
> +{
> + struct rcar_cmm *rcmm = platform_get_drvdata(pdev);
> +
> + rcar_cmm_write(rcmm, CM2_LUT_CTRL, 0);
> + rcmm->lut.enabled = false;
> +
> + pm_runtime_put(&pdev->dev);
> +}
> +EXPORT_SYMBOL_GPL(rcar_cmm_disable);
> +
> +/*
> + * rcar_cmm_init() - Initialize the CMM unit
> + * @pdev: The platform device associated with the CMM instance
> + *
> + * Return: 0 on success, -EPROBE_DEFER if the CMM is not available yet,
> + * -ENODEV if the DRM_RCAR_CMM config option is disabled
> + */
> +int rcar_cmm_init(struct platform_device *pdev)
> +{
> + struct rcar_cmm *rcmm = platform_get_drvdata(pdev);
> +
> + if (!rcmm)
> + return -EPROBE_DEFER;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(rcar_cmm_init);
> +
> +static int rcar_cmm_probe(struct platform_device *pdev)
> +{
> + struct rcar_cmm *rcmm;
> +
> + rcmm = devm_kzalloc(&pdev->dev, sizeof(*rcmm), GFP_KERNEL);
> + if (!rcmm)
> + return -ENOMEM;
> + platform_set_drvdata(pdev, rcmm);
> +
> + rcmm->base = devm_platform_ioremap_resource(pdev, 0);
> + if (IS_ERR(rcmm->base))
> + return PTR_ERR(rcmm->base);
> +
> + pm_runtime_enable(&pdev->dev);
> +
> + return 0;
> +}
> +
> +static int rcar_cmm_remove(struct platform_device *pdev)
> +{
> + pm_runtime_disable(&pdev->dev);
> +
> + return 0;
> +}
> +
> +static const struct of_device_id rcar_cmm_of_table[] = {
> + { .compatible = "renesas,rcar-gen3-cmm", },
> + { .compatible = "renesas,rcar-gen2-cmm", },
> + { },
> +};
> +MODULE_DEVICE_TABLE(of, rcar_cmm_of_table);
> +
> +static struct platform_driver rcar_cmm_platform_driver = {
> + .probe = rcar_cmm_probe,
> + .remove = rcar_cmm_remove,
> + .driver = {
> + .name = "rcar-cmm",
> + .of_match_table = rcar_cmm_of_table,
> + },
> +};
> +
> +module_platform_driver(rcar_cmm_platform_driver);
> +
> +MODULE_AUTHOR("Jacopo Mondi <jacopo+renesas@jmondi.org>");
> +MODULE_DESCRIPTION("Renesas R-Car CMM Driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/gpu/drm/rcar-du/rcar_cmm.h b/drivers/gpu/drm/rcar-du/rcar_cmm.h
> new file mode 100644
> index 000000000000..b5f7ec6db04a
> --- /dev/null
> +++ b/drivers/gpu/drm/rcar-du/rcar_cmm.h
> @@ -0,0 +1,58 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */
> +/*
> + * rcar_cmm.h -- R-Car Display Unit Color Management Module
> + *
> + * Copyright (C) 2019 Jacopo Mondi <jacopo+renesas@jmondi.org>
> + */
> +
> +#ifndef __RCAR_CMM_H__
> +#define __RCAR_CMM_H__
> +
> +#define CM2_LUT_SIZE 256
> +
> +struct drm_color_lut;
> +struct platform_device;
> +
> +/**
> + * struct rcar_cmm_config - CMM configuration
> + *
> + * @lut: 1D-LUT configuration
> + * @lut.table: 1D-LUT table entries. Disable LUT operations when NULL
> + */
> +struct rcar_cmm_config {
> + struct {
> + struct drm_color_lut *table;
> + } lut;
> +};
> +
> +#if IS_ENABLED(CONFIG_DRM_RCAR_CMM)
> +int rcar_cmm_init(struct platform_device *pdev);
> +
> +int rcar_cmm_enable(struct platform_device *pdev);
> +void rcar_cmm_disable(struct platform_device *pdev);
> +
> +int rcar_cmm_setup(struct platform_device *pdev,
> + const struct rcar_cmm_config *config);
> +#else
> +static inline int rcar_cmm_init(struct platform_device *pdev)
> +{
> + return -ENODEV;
> +}
> +
> +static inline int rcar_cmm_enable(struct platform_device *pdev)
> +{
> + return 0;
> +}
> +
> +static inline void rcar_cmm_disable(struct platform_device *pdev)
> +{
> +}
> +
> +static inline int rcar_cmm_setup(struct platform_device *pdev,
> + const struct rcar_cmm_config *config)
> +{
> + return 0;
> +}
> +#endif /* IS_ENABLED(CONFIG_DRM_RCAR_CMM) */
> +
> +#endif /* __RCAR_CMM_H__ */
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v7 3/7] drm: rcar-du: Add support for CMM
@ 2019-11-28 1:52 ` Laurent Pinchart
0 siblings, 0 replies; 30+ messages in thread
From: Laurent Pinchart @ 2019-11-28 1:52 UTC (permalink / raw)
To: Jacopo Mondi
Cc: horms, airlied, linux-kernel, dri-devel, linux-renesas-soc,
kieran.bingham+renesas, geert, uli+renesas
Hi Jacopo,
Thank you for the patch.
On Wed, Nov 13, 2019 at 11:05:52AM +0100, Jacopo Mondi wrote:
> Add a driver for the R-Car Display Unit Color Correction Module.
>
> In most of Gen3 SoCs, each DU output channel is provided with a CMM unit
> to perform image enhancement and color correction.
>
> Add support for CMM through a driver that supports configuration of
> the 1-dimensional LUT table. More advanced CMM features will be
> implemented on top of this initial one.
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
>
> ---
> v6 -> v7
> - Expand rcar_cmm_setup() function documentation to detail its relationship
> with rcar_cmm_enable() and their call order precedence.
>
> - Kconfig update: Make DRM_RCAR_CMM a tristate option and 'imply' it from the
> RCAR_DU one. This guarantees that if DU is built as a module CMM can only be
> built as a module as well. At the same time, if DU is built-in, CMM can
> be built-in only.
> ---
> drivers/gpu/drm/rcar-du/Kconfig | 8 ++
> drivers/gpu/drm/rcar-du/Makefile | 1 +
> drivers/gpu/drm/rcar-du/rcar_cmm.c | 217 +++++++++++++++++++++++++++++
> drivers/gpu/drm/rcar-du/rcar_cmm.h | 58 ++++++++
> 4 files changed, 284 insertions(+)
> create mode 100644 drivers/gpu/drm/rcar-du/rcar_cmm.c
> create mode 100644 drivers/gpu/drm/rcar-du/rcar_cmm.h
>
> diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig
> index 1529849e217e..6ed7a4f3c44e 100644
> --- a/drivers/gpu/drm/rcar-du/Kconfig
> +++ b/drivers/gpu/drm/rcar-du/Kconfig
> @@ -5,6 +5,7 @@ config DRM_RCAR_DU
> depends on ARM || ARM64
> depends on ARCH_RENESAS || COMPILE_TEST
> imply DRM_RCAR_LVDS
> + imply DRM_RCAR_CMM
I'll swap those two lines.
> select DRM_KMS_HELPER
> select DRM_KMS_CMA_HELPER
> select DRM_GEM_CMA_HELPER
> @@ -13,6 +14,13 @@ config DRM_RCAR_DU
> Choose this option if you have an R-Car chipset.
> If M is selected the module will be called rcar-du-drm.
>
> +config DRM_RCAR_CMM
> + tristate "R-Car DU Color Management Module (CMM) Support"
> + depends on DRM && OF
> + depends on DRM_RCAR_DU
I just wanted to point out that this prevents DRM_RCAR_DU=m and
DRM_RCAR_CMM=y, but I don't think that is a useful use case.
> + help
> + Enable support for R-Car Color Management Module (CMM).
> +
> config DRM_RCAR_DW_HDMI
> tristate "R-Car DU Gen3 HDMI Encoder Support"
> depends on DRM && OF
> diff --git a/drivers/gpu/drm/rcar-du/Makefile b/drivers/gpu/drm/rcar-du/Makefile
> index 6c2ed9c46467..4d1187ccc3e5 100644
> --- a/drivers/gpu/drm/rcar-du/Makefile
> +++ b/drivers/gpu/drm/rcar-du/Makefile
> @@ -15,6 +15,7 @@ rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS) += rcar_du_of.o \
> rcar-du-drm-$(CONFIG_DRM_RCAR_VSP) += rcar_du_vsp.o
> rcar-du-drm-$(CONFIG_DRM_RCAR_WRITEBACK) += rcar_du_writeback.o
>
> +obj-$(CONFIG_DRM_RCAR_CMM) += rcar_cmm.o
> obj-$(CONFIG_DRM_RCAR_DU) += rcar-du-drm.o
> obj-$(CONFIG_DRM_RCAR_DW_HDMI) += rcar_dw_hdmi.o
> obj-$(CONFIG_DRM_RCAR_LVDS) += rcar_lvds.o
> diff --git a/drivers/gpu/drm/rcar-du/rcar_cmm.c b/drivers/gpu/drm/rcar-du/rcar_cmm.c
> new file mode 100644
> index 000000000000..c578095b09a5
> --- /dev/null
> +++ b/drivers/gpu/drm/rcar-du/rcar_cmm.c
> @@ -0,0 +1,217 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * rcar_cmm.c -- R-Car Display Unit Color Management Module
> + *
> + * Copyright (C) 2019 Jacopo Mondi <jacopo+renesas@jmondi.org>
> + */
> +
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +
> +#include <drm/drm_color_mgmt.h>
> +
> +#include "rcar_cmm.h"
> +
> +#define CM2_LUT_CTRL 0x0000
> +#define CM2_LUT_CTRL_LUT_EN BIT(0)
> +#define CM2_LUT_TBL_BASE 0x0600
> +#define CM2_LUT_TBL(__i) (CM2_LUT_TBL_BASE + (__i) * 4)
> +
> +struct rcar_cmm {
> + void __iomem *base;
> +
> + /*
> + * @lut: 1D-LUT state
> + * @lut.enabled: 1D-LUT enabled flag
> + */
> + struct {
> + bool enabled;
> + } lut;
> +};
> +
> +static inline int rcar_cmm_read(struct rcar_cmm *rcmm, u32 reg)
> +{
> + return ioread32(rcmm->base + reg);
> +}
> +
> +static inline void rcar_cmm_write(struct rcar_cmm *rcmm, u32 reg, u32 data)
> +{
> + iowrite32(data, rcmm->base + reg);
> +}
> +
> +/*
> + * rcar_cmm_lut_write() - Scale the DRM LUT table entries to hardware precision
> + * and write to the CMM registers
> + * @rcmm: Pointer to the CMM device
> + * @drm_lut: Pointer to the DRM LUT table
> + */
> +static void rcar_cmm_lut_write(struct rcar_cmm *rcmm,
> + const struct drm_color_lut *drm_lut)
> +{
> + unsigned int i;
> +
> + for (i = 0; i < CM2_LUT_SIZE; ++i) {
> + u32 entry = drm_color_lut_extract(drm_lut[i].red, 8) << 16
> + | drm_color_lut_extract(drm_lut[i].green, 8) << 8
> + | drm_color_lut_extract(drm_lut[i].blue, 8);
> +
> + rcar_cmm_write(rcmm, CM2_LUT_TBL(i), entry);
> + }
> +}
> +
> +/*
> + * rcar_cmm_setup() - Configure the CMM unit
> + * @pdev: The platform device associated with the CMM instance
> + * @config: The CMM unit configuration
> + *
> + * Configure the CMM unit with the given configuration. Currently enabling,
> + * disabling and programming of the 1-D LUT unit is supported.
> + *
> + * As rcar_cmm_setup() accesses the CMM registers the unit should be powered
> + * and its functional clock enabled. To guarantee this, before any call to
> + * this function is made, the CMM unit has to be enabled by calling
> + * rcar_cmm_enable() first.
> + *
> + * TODO: Add support for LUT double buffer operations to avoid updating the
> + * LUT table entries while a frame is being displayed.
> + */
> +int rcar_cmm_setup(struct platform_device *pdev,
> + const struct rcar_cmm_config *config)
> +{
> + struct rcar_cmm *rcmm = platform_get_drvdata(pdev);
> +
> + /* Disable LUT if no table is provided. */
> + if (!config->lut.table) {
> + if (rcmm->lut.enabled) {
> + rcar_cmm_write(rcmm, CM2_LUT_CTRL, 0);
> + rcmm->lut.enabled = false;
> + }
> +
> + return 0;
> + }
> +
> + /* Enable LUT and program the new gamma table values. */
> + if (!rcmm->lut.enabled) {
> + rcar_cmm_write(rcmm, CM2_LUT_CTRL, CM2_LUT_CTRL_LUT_EN);
> + rcmm->lut.enabled = true;
> + }
> +
> + rcar_cmm_lut_write(rcmm, config->lut.table);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(rcar_cmm_setup);
> +
> +/*
> + * rcar_cmm_enable() - Enable the CMM unit
> + * @pdev: The platform device associated with the CMM instance
> + *
> + * When the output of the corresponding DU channel is routed to the CMM unit,
> + * the unit shall be enabled before the DU channel is started, and remain
> + * enabled until the channel is stopped. The CMM unit shall be disabled with
> + * rcar_cmm_disable().
> + *
> + * Calls to rcar_cmm_enable() and rcar_cmm_disable() are not reference-counted.
> + * It is an error to attempt to enable an already enabled CMM unit, or to
> + * attempt to disable a disabled unit.
> + */
> +int rcar_cmm_enable(struct platform_device *pdev)
> +{
> + int ret;
> +
> + ret = pm_runtime_get_sync(&pdev->dev);
> + if (ret < 0)
> + return ret;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(rcar_cmm_enable);
> +
> +/*
> + * rcar_cmm_disable() - Disable the CMM unit
> + * @pdev: The platform device associated with the CMM instance
> + *
> + * See rcar_cmm_enable() for usage information.
> + *
> + * Disabling the CMM unit disable all the internal processing blocks. The CMM
> + * state shall thus be restored with rcar_cmm_setup() when re-enabling the CMM
> + * unit after the next rcar_cmm_enable() call.
> + */
> +void rcar_cmm_disable(struct platform_device *pdev)
> +{
> + struct rcar_cmm *rcmm = platform_get_drvdata(pdev);
> +
> + rcar_cmm_write(rcmm, CM2_LUT_CTRL, 0);
> + rcmm->lut.enabled = false;
> +
> + pm_runtime_put(&pdev->dev);
> +}
> +EXPORT_SYMBOL_GPL(rcar_cmm_disable);
> +
> +/*
> + * rcar_cmm_init() - Initialize the CMM unit
> + * @pdev: The platform device associated with the CMM instance
> + *
> + * Return: 0 on success, -EPROBE_DEFER if the CMM is not available yet,
> + * -ENODEV if the DRM_RCAR_CMM config option is disabled
> + */
> +int rcar_cmm_init(struct platform_device *pdev)
> +{
> + struct rcar_cmm *rcmm = platform_get_drvdata(pdev);
> +
> + if (!rcmm)
> + return -EPROBE_DEFER;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(rcar_cmm_init);
> +
> +static int rcar_cmm_probe(struct platform_device *pdev)
> +{
> + struct rcar_cmm *rcmm;
> +
> + rcmm = devm_kzalloc(&pdev->dev, sizeof(*rcmm), GFP_KERNEL);
> + if (!rcmm)
> + return -ENOMEM;
> + platform_set_drvdata(pdev, rcmm);
> +
> + rcmm->base = devm_platform_ioremap_resource(pdev, 0);
> + if (IS_ERR(rcmm->base))
> + return PTR_ERR(rcmm->base);
> +
> + pm_runtime_enable(&pdev->dev);
> +
> + return 0;
> +}
> +
> +static int rcar_cmm_remove(struct platform_device *pdev)
> +{
> + pm_runtime_disable(&pdev->dev);
> +
> + return 0;
> +}
> +
> +static const struct of_device_id rcar_cmm_of_table[] = {
> + { .compatible = "renesas,rcar-gen3-cmm", },
> + { .compatible = "renesas,rcar-gen2-cmm", },
> + { },
> +};
> +MODULE_DEVICE_TABLE(of, rcar_cmm_of_table);
> +
> +static struct platform_driver rcar_cmm_platform_driver = {
> + .probe = rcar_cmm_probe,
> + .remove = rcar_cmm_remove,
> + .driver = {
> + .name = "rcar-cmm",
> + .of_match_table = rcar_cmm_of_table,
> + },
> +};
> +
> +module_platform_driver(rcar_cmm_platform_driver);
> +
> +MODULE_AUTHOR("Jacopo Mondi <jacopo+renesas@jmondi.org>");
> +MODULE_DESCRIPTION("Renesas R-Car CMM Driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/gpu/drm/rcar-du/rcar_cmm.h b/drivers/gpu/drm/rcar-du/rcar_cmm.h
> new file mode 100644
> index 000000000000..b5f7ec6db04a
> --- /dev/null
> +++ b/drivers/gpu/drm/rcar-du/rcar_cmm.h
> @@ -0,0 +1,58 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */
> +/*
> + * rcar_cmm.h -- R-Car Display Unit Color Management Module
> + *
> + * Copyright (C) 2019 Jacopo Mondi <jacopo+renesas@jmondi.org>
> + */
> +
> +#ifndef __RCAR_CMM_H__
> +#define __RCAR_CMM_H__
> +
> +#define CM2_LUT_SIZE 256
> +
> +struct drm_color_lut;
> +struct platform_device;
> +
> +/**
> + * struct rcar_cmm_config - CMM configuration
> + *
> + * @lut: 1D-LUT configuration
> + * @lut.table: 1D-LUT table entries. Disable LUT operations when NULL
> + */
> +struct rcar_cmm_config {
> + struct {
> + struct drm_color_lut *table;
> + } lut;
> +};
> +
> +#if IS_ENABLED(CONFIG_DRM_RCAR_CMM)
> +int rcar_cmm_init(struct platform_device *pdev);
> +
> +int rcar_cmm_enable(struct platform_device *pdev);
> +void rcar_cmm_disable(struct platform_device *pdev);
> +
> +int rcar_cmm_setup(struct platform_device *pdev,
> + const struct rcar_cmm_config *config);
> +#else
> +static inline int rcar_cmm_init(struct platform_device *pdev)
> +{
> + return -ENODEV;
> +}
> +
> +static inline int rcar_cmm_enable(struct platform_device *pdev)
> +{
> + return 0;
> +}
> +
> +static inline void rcar_cmm_disable(struct platform_device *pdev)
> +{
> +}
> +
> +static inline int rcar_cmm_setup(struct platform_device *pdev,
> + const struct rcar_cmm_config *config)
> +{
> + return 0;
> +}
> +#endif /* IS_ENABLED(CONFIG_DRM_RCAR_CMM) */
> +
> +#endif /* __RCAR_CMM_H__ */
--
Regards,
Laurent Pinchart
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v7 3/7] drm: rcar-du: Add support for CMM
@ 2019-11-28 7:56 ` Geert Uytterhoeven
0 siblings, 0 replies; 30+ messages in thread
From: Geert Uytterhoeven @ 2019-11-28 7:56 UTC (permalink / raw)
To: Jacopo Mondi
Cc: Laurent Pinchart, Kieran Bingham, Simon Horman, Ulrich Hecht,
David Airlie, Daniel Vetter, Linux-Renesas, DRI Development,
Linux Kernel Mailing List
Hi Jacopo,
On Wed, Nov 13, 2019 at 11:04 AM Jacopo Mondi <jacopo+renesas@jmondi.org> wrote:
> Add a driver for the R-Car Display Unit Color Correction Module.
> In most of Gen3 SoCs, each DU output channel is provided with a CMM unit
> to perform image enhancement and color correction.
>
> Add support for CMM through a driver that supports configuration of
> the 1-dimensional LUT table. More advanced CMM features will be
> implemented on top of this initial one.
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
> --- a/drivers/gpu/drm/rcar-du/Kconfig
> +++ b/drivers/gpu/drm/rcar-du/Kconfig
> @@ -5,6 +5,7 @@ config DRM_RCAR_DU
> depends on ARM || ARM64
> depends on ARCH_RENESAS || COMPILE_TEST
> imply DRM_RCAR_LVDS
> + imply DRM_RCAR_CMM
> select DRM_KMS_HELPER
> select DRM_KMS_CMA_HELPER
> select DRM_GEM_CMA_HELPER
> @@ -13,6 +14,13 @@ config DRM_RCAR_DU
> Choose this option if you have an R-Car chipset.
> If M is selected the module will be called rcar-du-drm.
>
> +config DRM_RCAR_CMM
> + tristate "R-Car DU Color Management Module (CMM) Support"
> + depends on DRM && OF
> + depends on DRM_RCAR_DU
DRM_RCAR_DU already depends on DRM && OF, so the line above
can be removed.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v7 3/7] drm: rcar-du: Add support for CMM
@ 2019-11-28 7:56 ` Geert Uytterhoeven
0 siblings, 0 replies; 30+ messages in thread
From: Geert Uytterhoeven @ 2019-11-28 7:56 UTC (permalink / raw)
To: Jacopo Mondi
Cc: Simon Horman, David Airlie, Linux Kernel Mailing List,
DRI Development, Linux-Renesas, Kieran Bingham, Laurent Pinchart,
Ulrich Hecht
Hi Jacopo,
On Wed, Nov 13, 2019 at 11:04 AM Jacopo Mondi <jacopo+renesas@jmondi.org> wrote:
> Add a driver for the R-Car Display Unit Color Correction Module.
> In most of Gen3 SoCs, each DU output channel is provided with a CMM unit
> to perform image enhancement and color correction.
>
> Add support for CMM through a driver that supports configuration of
> the 1-dimensional LUT table. More advanced CMM features will be
> implemented on top of this initial one.
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
> --- a/drivers/gpu/drm/rcar-du/Kconfig
> +++ b/drivers/gpu/drm/rcar-du/Kconfig
> @@ -5,6 +5,7 @@ config DRM_RCAR_DU
> depends on ARM || ARM64
> depends on ARCH_RENESAS || COMPILE_TEST
> imply DRM_RCAR_LVDS
> + imply DRM_RCAR_CMM
> select DRM_KMS_HELPER
> select DRM_KMS_CMA_HELPER
> select DRM_GEM_CMA_HELPER
> @@ -13,6 +14,13 @@ config DRM_RCAR_DU
> Choose this option if you have an R-Car chipset.
> If M is selected the module will be called rcar-du-drm.
>
> +config DRM_RCAR_CMM
> + tristate "R-Car DU Color Management Module (CMM) Support"
> + depends on DRM && OF
> + depends on DRM_RCAR_DU
DRM_RCAR_DU already depends on DRM && OF, so the line above
can be removed.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v7 3/7] drm: rcar-du: Add support for CMM
@ 2019-11-28 8:09 ` Laurent Pinchart
0 siblings, 0 replies; 30+ messages in thread
From: Laurent Pinchart @ 2019-11-28 8:09 UTC (permalink / raw)
To: Geert Uytterhoeven
Cc: Jacopo Mondi, Kieran Bingham, Simon Horman, Ulrich Hecht,
David Airlie, Daniel Vetter, Linux-Renesas, DRI Development,
Linux Kernel Mailing List
Hi Geert,
On Thu, Nov 28, 2019 at 08:56:14AM +0100, Geert Uytterhoeven wrote:
> On Wed, Nov 13, 2019 at 11:04 AM Jacopo Mondi <jacopo+renesas@jmondi.org> wrote:
> > Add a driver for the R-Car Display Unit Color Correction Module.
> > In most of Gen3 SoCs, each DU output channel is provided with a CMM unit
> > to perform image enhancement and color correction.
> >
> > Add support for CMM through a driver that supports configuration of
> > the 1-dimensional LUT table. More advanced CMM features will be
> > implemented on top of this initial one.
> >
> > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> > Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
>
> > --- a/drivers/gpu/drm/rcar-du/Kconfig
> > +++ b/drivers/gpu/drm/rcar-du/Kconfig
> > @@ -5,6 +5,7 @@ config DRM_RCAR_DU
> > depends on ARM || ARM64
> > depends on ARCH_RENESAS || COMPILE_TEST
> > imply DRM_RCAR_LVDS
> > + imply DRM_RCAR_CMM
> > select DRM_KMS_HELPER
> > select DRM_KMS_CMA_HELPER
> > select DRM_GEM_CMA_HELPER
> > @@ -13,6 +14,13 @@ config DRM_RCAR_DU
> > Choose this option if you have an R-Car chipset.
> > If M is selected the module will be called rcar-du-drm.
> >
> > +config DRM_RCAR_CMM
> > + tristate "R-Car DU Color Management Module (CMM) Support"
> > + depends on DRM && OF
> > + depends on DRM_RCAR_DU
>
> DRM_RCAR_DU already depends on DRM && OF, so the line above
> can be removed.
I've sent a pull request already. Can we address this on top ? Or is it
worth a separate patch, should we wait until we have to touch this and
then fix it in a "while at it" fashion ?
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v7 3/7] drm: rcar-du: Add support for CMM
@ 2019-11-28 8:09 ` Laurent Pinchart
0 siblings, 0 replies; 30+ messages in thread
From: Laurent Pinchart @ 2019-11-28 8:09 UTC (permalink / raw)
To: Geert Uytterhoeven
Cc: Simon Horman, David Airlie, Linux Kernel Mailing List,
DRI Development, Linux-Renesas, Kieran Bingham, Jacopo Mondi,
Ulrich Hecht
Hi Geert,
On Thu, Nov 28, 2019 at 08:56:14AM +0100, Geert Uytterhoeven wrote:
> On Wed, Nov 13, 2019 at 11:04 AM Jacopo Mondi <jacopo+renesas@jmondi.org> wrote:
> > Add a driver for the R-Car Display Unit Color Correction Module.
> > In most of Gen3 SoCs, each DU output channel is provided with a CMM unit
> > to perform image enhancement and color correction.
> >
> > Add support for CMM through a driver that supports configuration of
> > the 1-dimensional LUT table. More advanced CMM features will be
> > implemented on top of this initial one.
> >
> > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> > Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
>
> > --- a/drivers/gpu/drm/rcar-du/Kconfig
> > +++ b/drivers/gpu/drm/rcar-du/Kconfig
> > @@ -5,6 +5,7 @@ config DRM_RCAR_DU
> > depends on ARM || ARM64
> > depends on ARCH_RENESAS || COMPILE_TEST
> > imply DRM_RCAR_LVDS
> > + imply DRM_RCAR_CMM
> > select DRM_KMS_HELPER
> > select DRM_KMS_CMA_HELPER
> > select DRM_GEM_CMA_HELPER
> > @@ -13,6 +14,13 @@ config DRM_RCAR_DU
> > Choose this option if you have an R-Car chipset.
> > If M is selected the module will be called rcar-du-drm.
> >
> > +config DRM_RCAR_CMM
> > + tristate "R-Car DU Color Management Module (CMM) Support"
> > + depends on DRM && OF
> > + depends on DRM_RCAR_DU
>
> DRM_RCAR_DU already depends on DRM && OF, so the line above
> can be removed.
I've sent a pull request already. Can we address this on top ? Or is it
worth a separate patch, should we wait until we have to touch this and
then fix it in a "while at it" fashion ?
--
Regards,
Laurent Pinchart
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v7 3/7] drm: rcar-du: Add support for CMM
@ 2019-11-28 8:24 ` Geert Uytterhoeven
0 siblings, 0 replies; 30+ messages in thread
From: Geert Uytterhoeven @ 2019-11-28 8:24 UTC (permalink / raw)
To: Laurent Pinchart
Cc: Jacopo Mondi, Kieran Bingham, Simon Horman, Ulrich Hecht,
David Airlie, Daniel Vetter, Linux-Renesas, DRI Development,
Linux Kernel Mailing List
Hi Laurent,
On Thu, Nov 28, 2019 at 9:09 AM Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
> On Thu, Nov 28, 2019 at 08:56:14AM +0100, Geert Uytterhoeven wrote:
> > On Wed, Nov 13, 2019 at 11:04 AM Jacopo Mondi <jacopo+renesas@jmondi.org> wrote:
> > > Add a driver for the R-Car Display Unit Color Correction Module.
> > > In most of Gen3 SoCs, each DU output channel is provided with a CMM unit
> > > to perform image enhancement and color correction.
> > >
> > > Add support for CMM through a driver that supports configuration of
> > > the 1-dimensional LUT table. More advanced CMM features will be
> > > implemented on top of this initial one.
> > >
> > > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > > Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> > > Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
> >
> > > --- a/drivers/gpu/drm/rcar-du/Kconfig
> > > +++ b/drivers/gpu/drm/rcar-du/Kconfig
> > > @@ -5,6 +5,7 @@ config DRM_RCAR_DU
> > > depends on ARM || ARM64
> > > depends on ARCH_RENESAS || COMPILE_TEST
> > > imply DRM_RCAR_LVDS
> > > + imply DRM_RCAR_CMM
> > > select DRM_KMS_HELPER
> > > select DRM_KMS_CMA_HELPER
> > > select DRM_GEM_CMA_HELPER
> > > @@ -13,6 +14,13 @@ config DRM_RCAR_DU
> > > Choose this option if you have an R-Car chipset.
> > > If M is selected the module will be called rcar-du-drm.
> > >
> > > +config DRM_RCAR_CMM
> > > + tristate "R-Car DU Color Management Module (CMM) Support"
> > > + depends on DRM && OF
> > > + depends on DRM_RCAR_DU
> >
> > DRM_RCAR_DU already depends on DRM && OF, so the line above
> > can be removed.
>
> I've sent a pull request already. Can we address this on top ? Or is it
> worth a separate patch, should we wait until we have to touch this and
> then fix it in a "while at it" fashion ?
Sure. "while at it" is fine for me. It's not blocker.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH v7 3/7] drm: rcar-du: Add support for CMM
@ 2019-11-28 8:24 ` Geert Uytterhoeven
0 siblings, 0 replies; 30+ messages in thread
From: Geert Uytterhoeven @ 2019-11-28 8:24 UTC (permalink / raw)
To: Laurent Pinchart
Cc: Simon Horman, David Airlie, Linux Kernel Mailing List,
DRI Development, Linux-Renesas, Kieran Bingham, Jacopo Mondi,
Ulrich Hecht
Hi Laurent,
On Thu, Nov 28, 2019 at 9:09 AM Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
> On Thu, Nov 28, 2019 at 08:56:14AM +0100, Geert Uytterhoeven wrote:
> > On Wed, Nov 13, 2019 at 11:04 AM Jacopo Mondi <jacopo+renesas@jmondi.org> wrote:
> > > Add a driver for the R-Car Display Unit Color Correction Module.
> > > In most of Gen3 SoCs, each DU output channel is provided with a CMM unit
> > > to perform image enhancement and color correction.
> > >
> > > Add support for CMM through a driver that supports configuration of
> > > the 1-dimensional LUT table. More advanced CMM features will be
> > > implemented on top of this initial one.
> > >
> > > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > > Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> > > Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
> >
> > > --- a/drivers/gpu/drm/rcar-du/Kconfig
> > > +++ b/drivers/gpu/drm/rcar-du/Kconfig
> > > @@ -5,6 +5,7 @@ config DRM_RCAR_DU
> > > depends on ARM || ARM64
> > > depends on ARCH_RENESAS || COMPILE_TEST
> > > imply DRM_RCAR_LVDS
> > > + imply DRM_RCAR_CMM
> > > select DRM_KMS_HELPER
> > > select DRM_KMS_CMA_HELPER
> > > select DRM_GEM_CMA_HELPER
> > > @@ -13,6 +14,13 @@ config DRM_RCAR_DU
> > > Choose this option if you have an R-Car chipset.
> > > If M is selected the module will be called rcar-du-drm.
> > >
> > > +config DRM_RCAR_CMM
> > > + tristate "R-Car DU Color Management Module (CMM) Support"
> > > + depends on DRM && OF
> > > + depends on DRM_RCAR_DU
> >
> > DRM_RCAR_DU already depends on DRM && OF, so the line above
> > can be removed.
>
> I've sent a pull request already. Can we address this on top ? Or is it
> worth a separate patch, should we wait until we have to touch this and
> then fix it in a "while at it" fashion ?
Sure. "while at it" is fine for me. It's not blocker.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 30+ messages in thread
* [PATCH v7.1 5.7] drm: rcar-du: crtc: Control CMM operations
2019-11-13 10:05 ` Jacopo Mondi
@ 2019-12-17 23:02 ` Laurent Pinchart
-1 siblings, 0 replies; 30+ messages in thread
From: Laurent Pinchart @ 2019-12-17 23:02 UTC (permalink / raw)
To: dri-devel; +Cc: linux-renesas-soc, Jacopo Mondi
From: Jacopo Mondi <jacopo+renesas@jmondi.org>
Implement CMM handling in the crtc begin and enable atomic callbacks,
and enable CMM unit through the Display Extensional Functions
register at group setup time.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
[Fix printk format modifier for size_t variable]
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v7:
- Fix compilation warning on 32-bit platforms due to incorrect printk
modifier for a size_t variable (tested on both Gen2 and Gen3)
v6 -> v7
- Drop check for CMM in rcar_du_cmm_check as if the gamma_table property is
available, a CMM unit for this CRTC was registered
- Add TODO note to investigate how the activation order of CMM and CRTC
impact on the first displayed fram
---
drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 61 +++++++++++++++++++++++++
drivers/gpu/drm/rcar-du/rcar_du_group.c | 10 ++++
drivers/gpu/drm/rcar-du/rcar_du_regs.h | 5 ++
3 files changed, 76 insertions(+)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 23f1d6cc1719..84477d27e145 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -21,6 +21,7 @@
#include <drm/drm_plane_helper.h>
#include <drm/drm_vblank.h>
+#include "rcar_cmm.h"
#include "rcar_du_crtc.h"
#include "rcar_du_drv.h"
#include "rcar_du_encoder.h"
@@ -474,6 +475,45 @@ static void rcar_du_crtc_wait_page_flip(struct rcar_du_crtc *rcrtc)
rcar_du_crtc_finish_page_flip(rcrtc);
}
+/* -----------------------------------------------------------------------------
+ * Color Management Module (CMM)
+ */
+
+static int rcar_du_cmm_check(struct drm_crtc *crtc,
+ struct drm_crtc_state *state)
+{
+ struct drm_property_blob *drm_lut = state->gamma_lut;
+ struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
+ struct device *dev = rcrtc->dev->dev;
+
+ if (!drm_lut)
+ return 0;
+
+ /* We only accept fully populated LUT tables. */
+ if (drm_color_lut_size(drm_lut) != CM2_LUT_SIZE) {
+ dev_err(dev, "invalid gamma lut size: %zu bytes\n",
+ drm_lut->length);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void rcar_du_cmm_setup(struct drm_crtc *crtc)
+{
+ struct drm_property_blob *drm_lut = crtc->state->gamma_lut;
+ struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
+ struct rcar_cmm_config cmm_config = {};
+
+ if (!rcrtc->cmm)
+ return;
+
+ if (drm_lut)
+ cmm_config.lut.table = (struct drm_color_lut *)drm_lut->data;
+
+ rcar_cmm_setup(rcrtc->cmm, &cmm_config);
+}
+
/* -----------------------------------------------------------------------------
* Start/Stop and Suspend/Resume
*/
@@ -619,6 +659,9 @@ static void rcar_du_crtc_stop(struct rcar_du_crtc *rcrtc)
if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
rcar_du_vsp_disable(rcrtc);
+ if (rcrtc->cmm)
+ rcar_cmm_disable(rcrtc->cmm);
+
/*
* Select switch sync mode. This stops display operation and configures
* the HSYNC and VSYNC signals as inputs.
@@ -642,6 +685,11 @@ static int rcar_du_crtc_atomic_check(struct drm_crtc *crtc,
{
struct rcar_du_crtc_state *rstate = to_rcar_crtc_state(state);
struct drm_encoder *encoder;
+ int ret;
+
+ ret = rcar_du_cmm_check(crtc, state);
+ if (ret)
+ return ret;
/* Store the routes from the CRTC output to the DU outputs. */
rstate->outputs = 0;
@@ -667,6 +715,8 @@ static void rcar_du_crtc_atomic_enable(struct drm_crtc *crtc,
struct rcar_du_crtc_state *rstate = to_rcar_crtc_state(crtc->state);
struct rcar_du_device *rcdu = rcrtc->dev;
+ if (rcrtc->cmm)
+ rcar_cmm_enable(rcrtc->cmm);
rcar_du_crtc_get(rcrtc);
/*
@@ -686,6 +736,13 @@ static void rcar_du_crtc_atomic_enable(struct drm_crtc *crtc,
}
rcar_du_crtc_start(rcrtc);
+
+ /*
+ * TODO: The chip manual indicates that CMM tables should be written
+ * after the DU channel has been activated. Investigate the impact
+ * of this restriction on the first displayed frame.
+ */
+ rcar_du_cmm_setup(crtc);
}
static void rcar_du_crtc_atomic_disable(struct drm_crtc *crtc,
@@ -739,6 +796,10 @@ static void rcar_du_crtc_atomic_begin(struct drm_crtc *crtc,
*/
rcar_du_crtc_get(rcrtc);
+ /* If the active state changed, we let .atomic_enable handle CMM. */
+ if (crtc->state->color_mgmt_changed && !crtc->state->active_changed)
+ rcar_du_cmm_setup(crtc);
+
if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
rcar_du_vsp_atomic_begin(rcrtc);
}
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.c b/drivers/gpu/drm/rcar-du/rcar_du_group.c
index 9eee47969e77..88a783ceb3e9 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_group.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_group.c
@@ -135,6 +135,7 @@ static void rcar_du_group_setup_didsr(struct rcar_du_group *rgrp)
static void rcar_du_group_setup(struct rcar_du_group *rgrp)
{
struct rcar_du_device *rcdu = rgrp->dev;
+ u32 defr7 = DEFR7_CODE;
/* Enable extended features */
rcar_du_group_write(rgrp, DEFR, DEFR_CODE | DEFR_DEFE);
@@ -147,6 +148,15 @@ static void rcar_du_group_setup(struct rcar_du_group *rgrp)
rcar_du_group_setup_pins(rgrp);
+ /*
+ * TODO: Handle routing of the DU output to CMM dynamically, as we
+ * should bypass CMM completely when no color management feature is
+ * used.
+ */
+ defr7 |= (rgrp->cmms_mask & BIT(1) ? DEFR7_CMME1 : 0) |
+ (rgrp->cmms_mask & BIT(0) ? DEFR7_CMME0 : 0);
+ rcar_du_group_write(rgrp, DEFR7, defr7);
+
if (rcdu->info->gen >= 2) {
rcar_du_group_setup_defr8(rgrp);
rcar_du_group_setup_didsr(rgrp);
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_regs.h b/drivers/gpu/drm/rcar-du/rcar_du_regs.h
index bc87f080b170..fb9964949368 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_regs.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_regs.h
@@ -197,6 +197,11 @@
#define DEFR6_MLOS1 (1 << 2)
#define DEFR6_DEFAULT (DEFR6_CODE | DEFR6_TCNE1)
+#define DEFR7 0x000ec
+#define DEFR7_CODE (0x7779 << 16)
+#define DEFR7_CMME1 BIT(6)
+#define DEFR7_CMME0 BIT(4)
+
/* -----------------------------------------------------------------------------
* R8A7790-only Control Registers
*/
--
Regards,
Laurent Pinchart
^ permalink raw reply related [flat|nested] 30+ messages in thread
* [PATCH v7.1 5.7] drm: rcar-du: crtc: Control CMM operations
@ 2019-12-17 23:02 ` Laurent Pinchart
0 siblings, 0 replies; 30+ messages in thread
From: Laurent Pinchart @ 2019-12-17 23:02 UTC (permalink / raw)
To: dri-devel; +Cc: linux-renesas-soc, Jacopo Mondi
From: Jacopo Mondi <jacopo+renesas@jmondi.org>
Implement CMM handling in the crtc begin and enable atomic callbacks,
and enable CMM unit through the Display Extensional Functions
register at group setup time.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
[Fix printk format modifier for size_t variable]
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v7:
- Fix compilation warning on 32-bit platforms due to incorrect printk
modifier for a size_t variable (tested on both Gen2 and Gen3)
v6 -> v7
- Drop check for CMM in rcar_du_cmm_check as if the gamma_table property is
available, a CMM unit for this CRTC was registered
- Add TODO note to investigate how the activation order of CMM and CRTC
impact on the first displayed fram
---
drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 61 +++++++++++++++++++++++++
drivers/gpu/drm/rcar-du/rcar_du_group.c | 10 ++++
drivers/gpu/drm/rcar-du/rcar_du_regs.h | 5 ++
3 files changed, 76 insertions(+)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 23f1d6cc1719..84477d27e145 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -21,6 +21,7 @@
#include <drm/drm_plane_helper.h>
#include <drm/drm_vblank.h>
+#include "rcar_cmm.h"
#include "rcar_du_crtc.h"
#include "rcar_du_drv.h"
#include "rcar_du_encoder.h"
@@ -474,6 +475,45 @@ static void rcar_du_crtc_wait_page_flip(struct rcar_du_crtc *rcrtc)
rcar_du_crtc_finish_page_flip(rcrtc);
}
+/* -----------------------------------------------------------------------------
+ * Color Management Module (CMM)
+ */
+
+static int rcar_du_cmm_check(struct drm_crtc *crtc,
+ struct drm_crtc_state *state)
+{
+ struct drm_property_blob *drm_lut = state->gamma_lut;
+ struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
+ struct device *dev = rcrtc->dev->dev;
+
+ if (!drm_lut)
+ return 0;
+
+ /* We only accept fully populated LUT tables. */
+ if (drm_color_lut_size(drm_lut) != CM2_LUT_SIZE) {
+ dev_err(dev, "invalid gamma lut size: %zu bytes\n",
+ drm_lut->length);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void rcar_du_cmm_setup(struct drm_crtc *crtc)
+{
+ struct drm_property_blob *drm_lut = crtc->state->gamma_lut;
+ struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
+ struct rcar_cmm_config cmm_config = {};
+
+ if (!rcrtc->cmm)
+ return;
+
+ if (drm_lut)
+ cmm_config.lut.table = (struct drm_color_lut *)drm_lut->data;
+
+ rcar_cmm_setup(rcrtc->cmm, &cmm_config);
+}
+
/* -----------------------------------------------------------------------------
* Start/Stop and Suspend/Resume
*/
@@ -619,6 +659,9 @@ static void rcar_du_crtc_stop(struct rcar_du_crtc *rcrtc)
if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
rcar_du_vsp_disable(rcrtc);
+ if (rcrtc->cmm)
+ rcar_cmm_disable(rcrtc->cmm);
+
/*
* Select switch sync mode. This stops display operation and configures
* the HSYNC and VSYNC signals as inputs.
@@ -642,6 +685,11 @@ static int rcar_du_crtc_atomic_check(struct drm_crtc *crtc,
{
struct rcar_du_crtc_state *rstate = to_rcar_crtc_state(state);
struct drm_encoder *encoder;
+ int ret;
+
+ ret = rcar_du_cmm_check(crtc, state);
+ if (ret)
+ return ret;
/* Store the routes from the CRTC output to the DU outputs. */
rstate->outputs = 0;
@@ -667,6 +715,8 @@ static void rcar_du_crtc_atomic_enable(struct drm_crtc *crtc,
struct rcar_du_crtc_state *rstate = to_rcar_crtc_state(crtc->state);
struct rcar_du_device *rcdu = rcrtc->dev;
+ if (rcrtc->cmm)
+ rcar_cmm_enable(rcrtc->cmm);
rcar_du_crtc_get(rcrtc);
/*
@@ -686,6 +736,13 @@ static void rcar_du_crtc_atomic_enable(struct drm_crtc *crtc,
}
rcar_du_crtc_start(rcrtc);
+
+ /*
+ * TODO: The chip manual indicates that CMM tables should be written
+ * after the DU channel has been activated. Investigate the impact
+ * of this restriction on the first displayed frame.
+ */
+ rcar_du_cmm_setup(crtc);
}
static void rcar_du_crtc_atomic_disable(struct drm_crtc *crtc,
@@ -739,6 +796,10 @@ static void rcar_du_crtc_atomic_begin(struct drm_crtc *crtc,
*/
rcar_du_crtc_get(rcrtc);
+ /* If the active state changed, we let .atomic_enable handle CMM. */
+ if (crtc->state->color_mgmt_changed && !crtc->state->active_changed)
+ rcar_du_cmm_setup(crtc);
+
if (rcar_du_has(rcrtc->dev, RCAR_DU_FEATURE_VSP1_SOURCE))
rcar_du_vsp_atomic_begin(rcrtc);
}
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.c b/drivers/gpu/drm/rcar-du/rcar_du_group.c
index 9eee47969e77..88a783ceb3e9 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_group.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_group.c
@@ -135,6 +135,7 @@ static void rcar_du_group_setup_didsr(struct rcar_du_group *rgrp)
static void rcar_du_group_setup(struct rcar_du_group *rgrp)
{
struct rcar_du_device *rcdu = rgrp->dev;
+ u32 defr7 = DEFR7_CODE;
/* Enable extended features */
rcar_du_group_write(rgrp, DEFR, DEFR_CODE | DEFR_DEFE);
@@ -147,6 +148,15 @@ static void rcar_du_group_setup(struct rcar_du_group *rgrp)
rcar_du_group_setup_pins(rgrp);
+ /*
+ * TODO: Handle routing of the DU output to CMM dynamically, as we
+ * should bypass CMM completely when no color management feature is
+ * used.
+ */
+ defr7 |= (rgrp->cmms_mask & BIT(1) ? DEFR7_CMME1 : 0) |
+ (rgrp->cmms_mask & BIT(0) ? DEFR7_CMME0 : 0);
+ rcar_du_group_write(rgrp, DEFR7, defr7);
+
if (rcdu->info->gen >= 2) {
rcar_du_group_setup_defr8(rgrp);
rcar_du_group_setup_didsr(rgrp);
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_regs.h b/drivers/gpu/drm/rcar-du/rcar_du_regs.h
index bc87f080b170..fb9964949368 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_regs.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_regs.h
@@ -197,6 +197,11 @@
#define DEFR6_MLOS1 (1 << 2)
#define DEFR6_DEFAULT (DEFR6_CODE | DEFR6_TCNE1)
+#define DEFR7 0x000ec
+#define DEFR7_CODE (0x7779 << 16)
+#define DEFR7_CMME1 BIT(6)
+#define DEFR7_CMME0 BIT(4)
+
/* -----------------------------------------------------------------------------
* R8A7790-only Control Registers
*/
--
Regards,
Laurent Pinchart
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 30+ messages in thread
end of thread, other threads:[~2019-12-17 23:02 UTC | newest]
Thread overview: 30+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-11-13 10:05 [PATCH v7 0/7] drm: rcar-du: Add Color Management Module (CMM) Jacopo Mondi
2019-11-13 10:05 ` Jacopo Mondi
2019-11-13 10:05 ` [PATCH v7 1/7] dt-bindings: display: renesas,cmm: Add R-Car CMM documentation Jacopo Mondi
2019-11-13 10:05 ` [PATCH v7 1/7] dt-bindings: display: renesas, cmm: " Jacopo Mondi
2019-11-13 10:05 ` [PATCH v7 2/7] dt-bindings: display, renesas,du: Document cmms property Jacopo Mondi
2019-11-13 10:05 ` [PATCH v7 2/7] dt-bindings: display, renesas, du: " Jacopo Mondi
2019-11-13 13:34 ` [PATCH v7 2/7] dt-bindings: display, renesas,du: " Geert Uytterhoeven
2019-11-13 13:34 ` [PATCH v7 2/7] dt-bindings: display, renesas, du: " Geert Uytterhoeven
2019-11-28 1:50 ` [PATCH v7 2/7] dt-bindings: display, renesas,du: " Laurent Pinchart
2019-11-28 1:50 ` Laurent Pinchart
2019-11-13 10:05 ` [PATCH v7 3/7] drm: rcar-du: Add support for CMM Jacopo Mondi
2019-11-13 10:05 ` Jacopo Mondi
2019-11-28 1:52 ` Laurent Pinchart
2019-11-28 1:52 ` Laurent Pinchart
2019-11-28 7:56 ` Geert Uytterhoeven
2019-11-28 7:56 ` Geert Uytterhoeven
2019-11-28 8:09 ` Laurent Pinchart
2019-11-28 8:09 ` Laurent Pinchart
2019-11-28 8:24 ` Geert Uytterhoeven
2019-11-28 8:24 ` Geert Uytterhoeven
2019-11-13 10:05 ` [PATCH v7 4/7] drm: rcar-du: kms: Initialize CMM instances Jacopo Mondi
2019-11-13 10:05 ` Jacopo Mondi
2019-11-13 10:05 ` [PATCH v7 5/7] drm: rcar-du: crtc: Control CMM operations Jacopo Mondi
2019-11-13 10:05 ` Jacopo Mondi
2019-12-17 23:02 ` [PATCH v7.1 5.7] " Laurent Pinchart
2019-12-17 23:02 ` Laurent Pinchart
2019-11-13 10:05 ` [PATCH v7 6/7] drm: rcar-du: crtc: Register GAMMA_LUT properties Jacopo Mondi
2019-11-13 10:05 ` Jacopo Mondi
2019-11-13 10:05 ` [PATCH v7 7/7] drm: rcar-du: kms: Expand comment in vsps parsing routine Jacopo Mondi
2019-11-13 10:05 ` Jacopo Mondi
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