[PATCH v9 0/4] drm/panfrost: Add support for mt8183 GPU

[PATCH v9 0/4] drm/panfrost: Add support for mt8183 GPU

[Nicolas Boichat]

Hi!

Follow-up on the v5 [1], things have gotten significantly
better in the last 9 months, thanks to the efforts on Bifrost
support by the Collabora team (and probably others I'm not
aware of).

I've been testing this series on a MT8183/kukui device, with a
chromeos-5.10 kernel [2], and got basic Chromium OS UI up with
mesa 20.3.2 (lots of artifacts though).

devfreq is currently not supported, as we'll need:
 - Clock core support for switching the GPU core clock (see 2/4).
 - Platform-specific handling of the 2-regulator (see 3/4).

Since the latter is easy to detect, patch 3/4 just disables
devfreq if the more than one regulator is specified in the
compatible matching table.

[1] https://patchwork.kernel.org/project/linux-mediatek/cover/20200306041345.259332-1-drinkcat@chromium.org/
[2] https://crrev.com/c/2608070

Changes in v9:
 - Explain why devfreq needs to be disabled for GPUs with >1
   regulators.

Changes in v8:
 - Use DRM_DEV_INFO instead of ERROR

Changes in v7:
 - Fix GPU ID in commit message
 - Fix GPU ID in commit message

Changes in v6:
 - Rebased, actually tested with recent mesa driver.

Nicolas Boichat (4):
  dt-bindings: gpu: mali-bifrost: Add Mediatek MT8183
  arm64: dts: mt8183: Add node for the Mali GPU
  drm/panfrost: devfreq: Disable devfreq when num_supplies > 1
  drm/panfrost: Add mt8183-mali compatible string

 .../bindings/gpu/arm,mali-bifrost.yaml        |  25 +++++
 arch/arm64/boot/dts/mediatek/mt8183-evb.dts   |   6 +
 .../arm64/boot/dts/mediatek/mt8183-kukui.dtsi |   6 +
 arch/arm64/boot/dts/mediatek/mt8183.dtsi      | 105 ++++++++++++++++++
 drivers/gpu/drm/panfrost/panfrost_devfreq.c   |   9 ++
 drivers/gpu/drm/panfrost/panfrost_drv.c       |  10 ++
 6 files changed, 161 insertions(+)

-- 
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[PATCH v9 1/4] dt-bindings: gpu: mali-bifrost: Add Mediatek MT8183

[Nicolas Boichat]

Define a compatible string for the Mali Bifrost GPU found in
Mediatek's MT8183 SoCs.

Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
---

(no changes since v6)

Changes in v6:
 - Rebased, actually tested with recent mesa driver.
 - No change

Changes in v5:
 - Rename "2d" power domain to "core2"

Changes in v4:
 - Add power-domain-names description
   (kept Alyssa's reviewed-by as the change is minor)

Changes in v3:
 - No change

 .../bindings/gpu/arm,mali-bifrost.yaml        | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
index 184492162e7e..71b613ee5bd7 100644
--- a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
+++ b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
@@ -17,6 +17,7 @@ properties:
     items:
       - enum:
           - amlogic,meson-g12a-mali
+          - mediatek,mt8183-mali
           - realtek,rtd1619-mali
           - rockchip,px30-mali
       - const: arm,mali-bifrost # Mali Bifrost GPU model/revision is fully discoverable
@@ -87,6 +88,30 @@ allOf:
     then:
       required:
         - resets
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: mediatek,mt8183-mali
+    then:
+      properties:
+        sram-supply: true
+        power-domains:
+          description:
+            List of phandle and PM domain specifier as documented in
+            Documentation/devicetree/bindings/power/power_domain.txt
+          minItems: 3
+          maxItems: 3
+        power-domain-names:
+          items:
+            - const: core0
+            - const: core1
+            - const: core2
+
+      required:
+        - sram-supply
+        - power-domains
+        - power-domains-names
 
 examples:
   - |
-- 
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[PATCH v9 2/4] arm64: dts: mt8183: Add node for the Mali GPU

[Nicolas Boichat]

Add a basic GPU node for mt8183.

Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
---
The binding we use with out-of-tree Mali drivers includes more
clocks, this is used for devfreq: the out-of-tree driver switches
clk_mux to clk_sub_parent (26Mhz), adjusts clk_main_parent, then
switches clk_mux back to clk_main_parent:
(see https://chromium.googlesource.com/chromiumos/third_party/kernel/+/chromeos-4.19/drivers/gpu/arm/midgard/platform/mediatek/mali_kbase_runtime_pm.c#423)
clocks =
        <&topckgen CLK_TOP_MFGPLL_CK>,
        <&topckgen CLK_TOP_MUX_MFG>,
        <&clk26m>,
        <&mfgcfg CLK_MFG_BG3D>;
clock-names =
        "clk_main_parent",
        "clk_mux",
        "clk_sub_parent",
        "subsys_mfg_cg";
(based on discussions, this probably belongs in the clock core)

This only matters for devfreq, that is disabled anyway as we don't
have platform-specific code to handle >1 supplies.

(no changes since v6)

Changes in v6:
 - Add gpu regulators to kukui dtsi as well.
 - Power domains are now attached to spm, not scpsys
 - Drop R-B.

Changes in v5:
 - Rename "2d" power domain to "core2" (keep R-B again).

Changes in v4:
 - Add power-domain-names to describe the 3 domains.
   (kept Alyssa's reviewed-by as the change is minor)

Changes in v3:
 - No changes

Changes in v2:
 - Use sram instead of mali_sram as SRAM supply name.
 - Rename mali@ to gpu@.

 arch/arm64/boot/dts/mediatek/mt8183-evb.dts   |   6 +
 .../arm64/boot/dts/mediatek/mt8183-kukui.dtsi |   6 +
 arch/arm64/boot/dts/mediatek/mt8183.dtsi      | 105 ++++++++++++++++++
 3 files changed, 117 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8183-evb.dts b/arch/arm64/boot/dts/mediatek/mt8183-evb.dts
index cba2d8933e79..0a8c2fad8e16 100644
--- a/arch/arm64/boot/dts/mediatek/mt8183-evb.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8183-evb.dts
@@ -42,6 +42,12 @@ &auxadc {
 	status = "okay";
 };
 
+&gpu {
+	supply-names = "mali", "sram";
+	mali-supply = <&mt6358_vgpu_reg>;
+	sram-supply = <&mt6358_vsram_gpu_reg>;
+};
+
 &i2c0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&i2c_pins_0>;
diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
index bf2ad1294dd3..00d8e112cab9 100644
--- a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
@@ -249,6 +249,12 @@ &cpu7 {
 	proc-supply = <&mt6358_vproc11_reg>;
 };
 
+&gpu {
+	supply-names = "mali", "sram";
+	mali-supply = <&mt6358_vgpu_reg>;
+	sram-supply = <&mt6358_vsram_gpu_reg>;
+};
+
 &i2c0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&i2c0_pins>;
diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
index 5b782a4769e7..5430e05e18a0 100644
--- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
@@ -964,6 +964,111 @@ mfgcfg: syscon@13000000 {
 			#clock-cells = <1>;
 		};
 
+		gpu: gpu@13040000 {
+			compatible = "mediatek,mt8183-mali", "arm,mali-bifrost";
+			reg = <0 0x13040000 0 0x4000>;
+			interrupts =
+				<GIC_SPI 280 IRQ_TYPE_LEVEL_LOW>,
+				<GIC_SPI 279 IRQ_TYPE_LEVEL_LOW>,
+				<GIC_SPI 278 IRQ_TYPE_LEVEL_LOW>;
+			interrupt-names = "job", "mmu", "gpu";
+
+			clocks = <&topckgen CLK_TOP_MFGPLL_CK>;
+
+			power-domains =
+				<&spm MT8183_POWER_DOMAIN_MFG_CORE0>,
+				<&spm MT8183_POWER_DOMAIN_MFG_CORE1>,
+				<&spm MT8183_POWER_DOMAIN_MFG_2D>;
+			power-domain-names = "core0", "core1", "core2";
+
+			operating-points-v2 = <&gpu_opp_table>;
+		};
+
+		gpu_opp_table: opp_table0 {
+			compatible = "operating-points-v2";
+			opp-shared;
+
+			opp-300000000 {
+				opp-hz = /bits/ 64 <300000000>;
+				opp-microvolt = <625000>, <850000>;
+			};
+
+			opp-320000000 {
+				opp-hz = /bits/ 64 <320000000>;
+				opp-microvolt = <631250>, <850000>;
+			};
+
+			opp-340000000 {
+				opp-hz = /bits/ 64 <340000000>;
+				opp-microvolt = <637500>, <850000>;
+			};
+
+			opp-360000000 {
+				opp-hz = /bits/ 64 <360000000>;
+				opp-microvolt = <643750>, <850000>;
+			};
+
+			opp-380000000 {
+				opp-hz = /bits/ 64 <380000000>;
+				opp-microvolt = <650000>, <850000>;
+			};
+
+			opp-400000000 {
+				opp-hz = /bits/ 64 <400000000>;
+				opp-microvolt = <656250>, <850000>;
+			};
+
+			opp-420000000 {
+				opp-hz = /bits/ 64 <420000000>;
+				opp-microvolt = <662500>, <850000>;
+			};
+
+			opp-460000000 {
+				opp-hz = /bits/ 64 <460000000>;
+				opp-microvolt = <675000>, <850000>;
+			};
+
+			opp-500000000 {
+				opp-hz = /bits/ 64 <500000000>;
+				opp-microvolt = <687500>, <850000>;
+			};
+
+			opp-540000000 {
+				opp-hz = /bits/ 64 <540000000>;
+				opp-microvolt = <700000>, <850000>;
+			};
+
+			opp-580000000 {
+				opp-hz = /bits/ 64 <580000000>;
+				opp-microvolt = <712500>, <850000>;
+			};
+
+			opp-620000000 {
+				opp-hz = /bits/ 64 <620000000>;
+				opp-microvolt = <725000>, <850000>;
+			};
+
+			opp-653000000 {
+				opp-hz = /bits/ 64 <653000000>;
+				opp-microvolt = <743750>, <850000>;
+			};
+
+			opp-698000000 {
+				opp-hz = /bits/ 64 <698000000>;
+				opp-microvolt = <768750>, <868750>;
+			};
+
+			opp-743000000 {
+				opp-hz = /bits/ 64 <743000000>;
+				opp-microvolt = <793750>, <893750>;
+			};
+
+			opp-800000000 {
+				opp-hz = /bits/ 64 <800000000>;
+				opp-microvolt = <825000>, <925000>;
+			};
+		};
+
 		mmsys: syscon@14000000 {
 			compatible = "mediatek,mt8183-mmsys", "syscon";
 			reg = <0 0x14000000 0 0x1000>;
-- 
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[PATCH v9 4/4] drm/panfrost: Add mt8183-mali compatible string

[Nicolas Boichat]

Add support for MT8183's G72 Bifrost.

Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
---

(no changes since v7)

Changes in v7:
 - Fix GPU ID in commit message

Changes in v6:
 - Context conflicts, reflow the code.
 - Use ARRAY_SIZE for power domains too.

Changes in v5:
 - Change power domain name from 2d to core2.

Changes in v4:
 - Add power domain names.

Changes in v3:
 - Match mt8183-mali instead of bifrost, as we require special
   handling for the 2 regulators and 3 power domains.

 drivers/gpu/drm/panfrost/panfrost_drv.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
index 83a461bdeea8..ca07098a6141 100644
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -665,6 +665,15 @@ static const struct panfrost_compatible amlogic_data = {
 	.vendor_quirk = panfrost_gpu_amlogic_quirk,
 };
 
+const char * const mediatek_mt8183_supplies[] = { "mali", "sram" };
+const char * const mediatek_mt8183_pm_domains[] = { "core0", "core1", "core2" };
+static const struct panfrost_compatible mediatek_mt8183_data = {
+	.num_supplies = ARRAY_SIZE(mediatek_mt8183_supplies),
+	.supply_names = mediatek_mt8183_supplies,
+	.num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
+	.pm_domain_names = mediatek_mt8183_pm_domains,
+};
+
 static const struct of_device_id dt_match[] = {
 	/* Set first to probe before the generic compatibles */
 	{ .compatible = "amlogic,meson-gxm-mali",
@@ -681,6 +690,7 @@ static const struct of_device_id dt_match[] = {
 	{ .compatible = "arm,mali-t860", .data = &default_data, },
 	{ .compatible = "arm,mali-t880", .data = &default_data, },
 	{ .compatible = "arm,mali-bifrost", .data = &default_data, },
+	{ .compatible = "mediatek,mt8183-mali", .data = &mediatek_mt8183_data },
 	{}
 };
 MODULE_DEVICE_TABLE(of, dt_match);
-- 
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Re: [PATCH v9 1/4] dt-bindings: gpu: mali-bifrost: Add Mediatek MT8183

[Rob Herring]

On Fri, Jan 08, 2021 at 09:10:08AM +0800, Nicolas Boichat wrote:
> Define a compatible string for the Mali Bifrost GPU found in
> Mediatek's MT8183 SoCs.
> 
> Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
> Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
> ---
> 
> (no changes since v6)
> 
> Changes in v6:
>  - Rebased, actually tested with recent mesa driver.
>  - No change
> 
> Changes in v5:
>  - Rename "2d" power domain to "core2"
> 
> Changes in v4:
>  - Add power-domain-names description
>    (kept Alyssa's reviewed-by as the change is minor)
> 
> Changes in v3:
>  - No change
> 
>  .../bindings/gpu/arm,mali-bifrost.yaml        | 25 +++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> index 184492162e7e..71b613ee5bd7 100644
> --- a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> +++ b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> @@ -17,6 +17,7 @@ properties:
>      items:
>        - enum:
>            - amlogic,meson-g12a-mali
> +          - mediatek,mt8183-mali
>            - realtek,rtd1619-mali
>            - rockchip,px30-mali
>        - const: arm,mali-bifrost # Mali Bifrost GPU model/revision is fully discoverable
> @@ -87,6 +88,30 @@ allOf:
>      then:
>        required:
>          - resets
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: mediatek,mt8183-mali
> +    then:
> +      properties:
> +        sram-supply: true

This has to be defined at the top-level or there will be an error when 
it is present (due to additionalProperties).

In this if/then you can do:

else:
  sram-supply: false

to disallow it if not 'mediatek,mt8183-mali'

> +        power-domains:
> +          description:
> +            List of phandle and PM domain specifier as documented in
> +            Documentation/devicetree/bindings/power/power_domain.txt
> +          minItems: 3
> +          maxItems: 3
> +        power-domain-names:
> +          items:
> +            - const: core0
> +            - const: core1
> +            - const: core2
> +
> +      required:
> +        - sram-supply
> +        - power-domains
> +        - power-domains-names
>  
>  examples:
>    - |
> -- 
> 2.29.2.729.g45daf8777d-goog
> 

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Re: [PATCH v9 1/4] dt-bindings: gpu: mali-bifrost: Add Mediatek MT8183

[Nicolas Boichat]

On Tue, Jan 12, 2021 at 11:07 PM Rob Herring <robh@kernel.org> wrote:
>
> On Fri, Jan 08, 2021 at 09:10:08AM +0800, Nicolas Boichat wrote:
> > Define a compatible string for the Mali Bifrost GPU found in
> > Mediatek's MT8183 SoCs.
> >
> > Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
> > Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
> > ---
> >
> > (no changes since v6)
> >
> > Changes in v6:
> >  - Rebased, actually tested with recent mesa driver.
> >  - No change
> >
> > Changes in v5:
> >  - Rename "2d" power domain to "core2"
> >
> > Changes in v4:
> >  - Add power-domain-names description
> >    (kept Alyssa's reviewed-by as the change is minor)
> >
> > Changes in v3:
> >  - No change
> >
> >  .../bindings/gpu/arm,mali-bifrost.yaml        | 25 +++++++++++++++++++
> >  1 file changed, 25 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> > index 184492162e7e..71b613ee5bd7 100644
> > --- a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> > +++ b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> > @@ -17,6 +17,7 @@ properties:
> >      items:
> >        - enum:
> >            - amlogic,meson-g12a-mali
> > +          - mediatek,mt8183-mali
> >            - realtek,rtd1619-mali
> >            - rockchip,px30-mali
> >        - const: arm,mali-bifrost # Mali Bifrost GPU model/revision is fully discoverable
> > @@ -87,6 +88,30 @@ allOf:
> >      then:
> >        required:
> >          - resets
> > +  - if:
> > +      properties:
> > +        compatible:
> > +          contains:
> > +            const: mediatek,mt8183-mali
> > +    then:
> > +      properties:
> > +        sram-supply: true
>
> This has to be defined at the top-level or there will be an error when
> it is present (due to additionalProperties).
>
> In this if/then you can do:
>
> else:
>   sram-supply: false
>
> to disallow it if not 'mediatek,mt8183-mali'

I see. Thanks Rob, will send a v10.



>
> > +        power-domains:
> > +          description:
> > +            List of phandle and PM domain specifier as documented in
> > +            Documentation/devicetree/bindings/power/power_domain.txt
> > +          minItems: 3
> > +          maxItems: 3
> > +        power-domain-names:
> > +          items:
> > +            - const: core0
> > +            - const: core1
> > +            - const: core2
> > +
> > +      required:
> > +        - sram-supply
> > +        - power-domains
> > +        - power-domains-names
> >
> >  examples:
> >    - |
> > --
> > 2.29.2.729.g45daf8777d-goog
> >

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