[PATCH v13 0/4] drm/panfrost: Add support for mt8183 GPU

[PATCH v13 0/4] drm/panfrost: Add support for mt8183 GPU

[Nicolas Boichat]

Hi!

This is just a rebase of the v11, untested (but it seems like
Neil Armstrong recently tested it), with small changes in
binding and dts. v11 cover follows:

Follow-up on the v5 [1], things have gotten significantly
better in the last year, 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 v13:
 - devfreq: Fix conflict resolution mistake when rebasing, didn't
   even compile. Oops.

Changes in v12:
 - binding: Fix min/maxItems logic (Rob Herring)
 - Add gpu node to mt8183-pumpkin.dts as well (Neil Armstrong).

Changes in v11:
 - binding: power-domain-names not power-domainS-names
 - mt8183*.dts: remove incorrect supply-names

Changes in v10:
 - Fix the binding to make sure sram-supply property can be provided.

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.
 - Add gpu regulators to kukui dtsi as well.
 - Power domains are now attached to spm, not scpsys
 - Drop R-B.
 - devfreq: New change
 - Context conflicts, reflow the code.
 - Use ARRAY_SIZE for power domains too.

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

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

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

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        |  30 ++++-
 arch/arm64/boot/dts/mediatek/mt8183-evb.dts   |   5 +
 .../arm64/boot/dts/mediatek/mt8183-kukui.dtsi |   5 +
 .../boot/dts/mediatek/mt8183-pumpkin.dts      |   5 +
 arch/arm64/boot/dts/mediatek/mt8183.dtsi      | 105 ++++++++++++++++++
 drivers/gpu/drm/panfrost/panfrost_devfreq.c   |   9 ++
 drivers/gpu/drm/panfrost/panfrost_drv.c       |  10 ++
 7 files changed, 168 insertions(+), 1 deletion(-)

-- 
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[PATCH v13 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>
---

(no changes since v12)

Changes in v12:
 - binding: Fix min/maxItems logic (Rob Herring)

Changes in v11:
 - binding: power-domain-names not power-domainS-names

Changes in v10:
 - Fix the binding to make sure sram-supply property can be provided.

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

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)

 .../bindings/gpu/arm,mali-bifrost.yaml        | 30 ++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
index 184492162e7e..b22cd8f1b015 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
@@ -41,10 +42,13 @@ properties:
 
   mali-supply: true
 
+  sram-supply: true
+
   operating-points-v2: true
 
   power-domains:
-    maxItems: 1
+    minItems: 1
+    maxItems: 3
 
   resets:
     maxItems: 2
@@ -87,6 +91,30 @@ allOf:
     then:
       required:
         - resets
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: mediatek,mt8183-mali
+    then:
+      properties:
+        power-domains:
+          minItems: 3
+        power-domain-names:
+          items:
+            - const: core0
+            - const: core1
+            - const: core2
+
+      required:
+        - sram-supply
+        - power-domains
+        - power-domain-names
+    else:
+      properties:
+        power-domains:
+          maxItems: 1
+        sram-supply: false
 
 examples:
   - |
-- 
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[PATCH v13 3/4] drm/panfrost: devfreq: Disable devfreq when num_supplies > 1

[Nicolas Boichat]

GPUs with more than a single regulator (e.g. G72 on MT8183) will
require platform-specific handling for devfreq, for 2 reasons:
 1. The opp core (drivers/opp/core.c:_generic_set_opp_regulator)
    does not support multiple regulators, so we'll need custom
    handlers.
 2. Generally, platforms with 2 regulators have platform-specific
    constraints on how the voltages should be set (e.g.
    minimum/maximum voltage difference between them), so we
    should not just create generic handlers that simply
    change the voltages without taking care of those constraints.

Disable devfreq for now on those GPUs.

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

Changes in v13:
 - devfreq: Fix conflict resolution mistake when rebasing, didn't
   even compile. Oops.

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

Changes in v6:
 - devfreq: New change

 drivers/gpu/drm/panfrost/panfrost_devfreq.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
index 47d27e54a34f..3644652f726f 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
@@ -92,6 +92,15 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
 	struct thermal_cooling_device *cooling;
 	struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;
 
+	if (pfdev->comp->num_supplies > 1) {
+		/*
+		 * GPUs with more than 1 supply require platform-specific handling:
+		 * continue without devfreq
+		 */
+		DRM_DEV_INFO(dev, "More than 1 supply is not supported yet\n");
+		return 0;
+	}
+
 	ret = devm_pm_opp_set_regulators(dev, pfdev->comp->supply_names,
 					 pfdev->comp->num_supplies);
 	if (ret) {
-- 
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[PATCH v13 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>
Reviewed-by: Steven Price <steven.price@arm.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 v13 4/4] drm/panfrost: Add mt8183-mali compatible string

[Alyssa Rosenzweig]

Not that you need it but this patch is Reviewed-by: Alyssa Rosenzweig
<alyssa.rosenzweig@collabora.com>

On Wed, Apr 21, 2021 at 01:28:55PM +0800, Nicolas Boichat wrote:
> Add support for MT8183's G72 Bifrost.
> 
> Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
> Reviewed-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
> Reviewed-by: Steven Price <steven.price@arm.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);
> -- 
> 2.31.1.368.gbe11c130af-goog
> 
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Re: [PATCH v13 1/4] dt-bindings: gpu: mali-bifrost: Add Mediatek MT8183

[Rob Herring]

On Wed, 21 Apr 2021 13:28:52 +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>
> ---
> 
> (no changes since v12)
> 
> Changes in v12:
>  - binding: Fix min/maxItems logic (Rob Herring)
> 
> Changes in v11:
>  - binding: power-domain-names not power-domainS-names
> 
> Changes in v10:
>  - Fix the binding to make sure sram-supply property can be provided.
> 
> Changes in v6:
>  - Rebased, actually tested with recent mesa driver.
> 
> 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)
> 
>  .../bindings/gpu/arm,mali-bifrost.yaml        | 30 ++++++++++++++++++-
>  1 file changed, 29 insertions(+), 1 deletion(-)
> 

Reviewed-by: Rob Herring <robh@kernel.org>
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Re: [PATCH v13 0/4] drm/panfrost: Add support for mt8183 GPU

[Neil Armstrong]

Hi,

On 21/04/2021 07:28, Nicolas Boichat wrote:
> Hi!
> 
> This is just a rebase of the v11, untested (but it seems like
> Neil Armstrong recently tested it), with small changes in
> binding and dts. v11 cover follows:
> 
> Follow-up on the v5 [1], things have gotten significantly
> better in the last year, 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 v13:
>  - devfreq: Fix conflict resolution mistake when rebasing, didn't
>    even compile. Oops.
> 
> Changes in v12:
>  - binding: Fix min/maxItems logic (Rob Herring)
>  - Add gpu node to mt8183-pumpkin.dts as well (Neil Armstrong).
> 
> Changes in v11:
>  - binding: power-domain-names not power-domainS-names
>  - mt8183*.dts: remove incorrect supply-names
> 
> Changes in v10:
>  - Fix the binding to make sure sram-supply property can be provided.
> 
> 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.
>  - Add gpu regulators to kukui dtsi as well.
>  - Power domains are now attached to spm, not scpsys
>  - Drop R-B.
>  - devfreq: New change
>  - Context conflicts, reflow the code.
>  - Use ARRAY_SIZE for power domains too.
> 
> Changes in v5:
>  - Rename "2d" power domain to "core2"
>  - Rename "2d" power domain to "core2" (keep R-B again).
>  - Change power domain name from 2d to core2.
> 
> Changes in v4:
>  - Add power-domain-names description
>    (kept Alyssa's reviewed-by as the change is minor)
>  - Add power-domain-names to describe the 3 domains.
>    (kept Alyssa's reviewed-by as the change is minor)
>  - 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.
> 
> Changes in v2:
>  - Use sram instead of mali_sram as SRAM supply name.
>  - Rename mali@ to gpu@.
> 
> 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        |  30 ++++-
>  arch/arm64/boot/dts/mediatek/mt8183-evb.dts   |   5 +
>  .../arm64/boot/dts/mediatek/mt8183-kukui.dtsi |   5 +
>  .../boot/dts/mediatek/mt8183-pumpkin.dts      |   5 +
>  arch/arm64/boot/dts/mediatek/mt8183.dtsi      | 105 ++++++++++++++++++
>  drivers/gpu/drm/panfrost/panfrost_devfreq.c   |   9 ++
>  drivers/gpu/drm/panfrost/panfrost_drv.c       |  10 ++
>  7 files changed, 168 insertions(+), 1 deletion(-)
> 

Seems this version is ready to be applied if we get a review on the DT ?

Mathias ? could you have a look ?

Neil
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Re: [PATCH v13 0/4] drm/panfrost: Add support for mt8183 GPU

[Ezequiel Garcia]

Hi Neil,

On Mon, 26 Apr 2021 at 06:59, Neil Armstrong <narmstrong@baylibre.com> wrote:
>
> Hi,
>
> On 21/04/2021 07:28, Nicolas Boichat wrote:
> > Hi!
> >
> > This is just a rebase of the v11, untested (but it seems like
> > Neil Armstrong recently tested it), with small changes in
> > binding and dts. v11 cover follows:
> >
> > Follow-up on the v5 [1], things have gotten significantly
> > better in the last year, 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 v13:
> >  - devfreq: Fix conflict resolution mistake when rebasing, didn't
> >    even compile. Oops.
> >
> > Changes in v12:
> >  - binding: Fix min/maxItems logic (Rob Herring)
> >  - Add gpu node to mt8183-pumpkin.dts as well (Neil Armstrong).
> >
> > Changes in v11:
> >  - binding: power-domain-names not power-domainS-names
> >  - mt8183*.dts: remove incorrect supply-names
> >
> > Changes in v10:
> >  - Fix the binding to make sure sram-supply property can be provided.
> >
> > 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.
> >  - Add gpu regulators to kukui dtsi as well.
> >  - Power domains are now attached to spm, not scpsys
> >  - Drop R-B.
> >  - devfreq: New change
> >  - Context conflicts, reflow the code.
> >  - Use ARRAY_SIZE for power domains too.
> >
> > Changes in v5:
> >  - Rename "2d" power domain to "core2"
> >  - Rename "2d" power domain to "core2" (keep R-B again).
> >  - Change power domain name from 2d to core2.
> >
> > Changes in v4:
> >  - Add power-domain-names description
> >    (kept Alyssa's reviewed-by as the change is minor)
> >  - Add power-domain-names to describe the 3 domains.
> >    (kept Alyssa's reviewed-by as the change is minor)
> >  - 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.
> >
> > Changes in v2:
> >  - Use sram instead of mali_sram as SRAM supply name.
> >  - Rename mali@ to gpu@.
> >
> > 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        |  30 ++++-
> >  arch/arm64/boot/dts/mediatek/mt8183-evb.dts   |   5 +
> >  .../arm64/boot/dts/mediatek/mt8183-kukui.dtsi |   5 +
> >  .../boot/dts/mediatek/mt8183-pumpkin.dts      |   5 +
> >  arch/arm64/boot/dts/mediatek/mt8183.dtsi      | 105 ++++++++++++++++++
> >  drivers/gpu/drm/panfrost/panfrost_devfreq.c   |   9 ++
> >  drivers/gpu/drm/panfrost/panfrost_drv.c       |  10 ++
> >  7 files changed, 168 insertions(+), 1 deletion(-)
> >
>
> Seems this version is ready to be applied if we get a review on the DT ?
>
> Mathias ? could you have a look ?
>

Given Rob has Acked the DT bindings, I think it's OK to apply patches
1, 3 and 4 via drm-misc, letting Mediatek people sort out the DT changes.

My two unsolicited cents :-)

Ezequiel

Re: [PATCH v13 0/4] drm/panfrost: Add support for mt8183 GPU

[Neil Armstrong]

On 13/05/2021 16:55, Ezequiel Garcia wrote:
> Hi Neil,
> 
> On Mon, 26 Apr 2021 at 06:59, Neil Armstrong <narmstrong@baylibre.com> wrote:
>>
>> Hi,
>>
>> On 21/04/2021 07:28, Nicolas Boichat wrote:
>>> Hi!
>>>
>>> This is just a rebase of the v11, untested (but it seems like
>>> Neil Armstrong recently tested it), with small changes in
>>> binding and dts. v11 cover follows:
>>>
>>> Follow-up on the v5 [1], things have gotten significantly
>>> better in the last year, 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 v13:
>>>  - devfreq: Fix conflict resolution mistake when rebasing, didn't
>>>    even compile. Oops.
>>>
>>> Changes in v12:
>>>  - binding: Fix min/maxItems logic (Rob Herring)
>>>  - Add gpu node to mt8183-pumpkin.dts as well (Neil Armstrong).
>>>
>>> Changes in v11:
>>>  - binding: power-domain-names not power-domainS-names
>>>  - mt8183*.dts: remove incorrect supply-names
>>>
>>> Changes in v10:
>>>  - Fix the binding to make sure sram-supply property can be provided.
>>>
>>> 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.
>>>  - Add gpu regulators to kukui dtsi as well.
>>>  - Power domains are now attached to spm, not scpsys
>>>  - Drop R-B.
>>>  - devfreq: New change
>>>  - Context conflicts, reflow the code.
>>>  - Use ARRAY_SIZE for power domains too.
>>>
>>> Changes in v5:
>>>  - Rename "2d" power domain to "core2"
>>>  - Rename "2d" power domain to "core2" (keep R-B again).
>>>  - Change power domain name from 2d to core2.
>>>
>>> Changes in v4:
>>>  - Add power-domain-names description
>>>    (kept Alyssa's reviewed-by as the change is minor)
>>>  - Add power-domain-names to describe the 3 domains.
>>>    (kept Alyssa's reviewed-by as the change is minor)
>>>  - 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.
>>>
>>> Changes in v2:
>>>  - Use sram instead of mali_sram as SRAM supply name.
>>>  - Rename mali@ to gpu@.
>>>
>>> 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        |  30 ++++-
>>>  arch/arm64/boot/dts/mediatek/mt8183-evb.dts   |   5 +
>>>  .../arm64/boot/dts/mediatek/mt8183-kukui.dtsi |   5 +
>>>  .../boot/dts/mediatek/mt8183-pumpkin.dts      |   5 +
>>>  arch/arm64/boot/dts/mediatek/mt8183.dtsi      | 105 ++++++++++++++++++
>>>  drivers/gpu/drm/panfrost/panfrost_devfreq.c   |   9 ++
>>>  drivers/gpu/drm/panfrost/panfrost_drv.c       |  10 ++
>>>  7 files changed, 168 insertions(+), 1 deletion(-)
>>>
>>
>> Seems this version is ready to be applied if we get a review on the DT ?
>>
>> Mathias ? could you have a look ?
>>
> 
> Given Rob has Acked the DT bindings, I think it's OK to apply patches
> 1, 3 and 4 via drm-misc, letting Mediatek people sort out the DT changes.
> 
> My two unsolicited cents :-)

Yeah sure, is there a panfrost maintainer in the room ? I can apply them if you ack me.

Neil

> 
> Ezequiel
> 

Re: [PATCH v13 0/4] drm/panfrost: Add support for mt8183 GPU

[Steven Price]

On 14/05/2021 15:48, Neil Armstrong wrote:
> On 13/05/2021 16:55, Ezequiel Garcia wrote:
>> Hi Neil,
>>
>> On Mon, 26 Apr 2021 at 06:59, Neil Armstrong <narmstrong@baylibre.com> wrote:
>>>
>>> Hi,
>>>
>>> On 21/04/2021 07:28, Nicolas Boichat wrote:
>>>> Hi!
>>>>
>>>> This is just a rebase of the v11, untested (but it seems like
>>>> Neil Armstrong recently tested it), with small changes in
>>>> binding and dts. v11 cover follows:
>>>>
>>>> Follow-up on the v5 [1], things have gotten significantly
>>>> better in the last year, 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 v13:
>>>>  - devfreq: Fix conflict resolution mistake when rebasing, didn't
>>>>    even compile. Oops.
>>>>
>>>> Changes in v12:
>>>>  - binding: Fix min/maxItems logic (Rob Herring)
>>>>  - Add gpu node to mt8183-pumpkin.dts as well (Neil Armstrong).
>>>>
>>>> Changes in v11:
>>>>  - binding: power-domain-names not power-domainS-names
>>>>  - mt8183*.dts: remove incorrect supply-names
>>>>
>>>> Changes in v10:
>>>>  - Fix the binding to make sure sram-supply property can be provided.
>>>>
>>>> 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.
>>>>  - Add gpu regulators to kukui dtsi as well.
>>>>  - Power domains are now attached to spm, not scpsys
>>>>  - Drop R-B.
>>>>  - devfreq: New change
>>>>  - Context conflicts, reflow the code.
>>>>  - Use ARRAY_SIZE for power domains too.
>>>>
>>>> Changes in v5:
>>>>  - Rename "2d" power domain to "core2"
>>>>  - Rename "2d" power domain to "core2" (keep R-B again).
>>>>  - Change power domain name from 2d to core2.
>>>>
>>>> Changes in v4:
>>>>  - Add power-domain-names description
>>>>    (kept Alyssa's reviewed-by as the change is minor)
>>>>  - Add power-domain-names to describe the 3 domains.
>>>>    (kept Alyssa's reviewed-by as the change is minor)
>>>>  - 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.
>>>>
>>>> Changes in v2:
>>>>  - Use sram instead of mali_sram as SRAM supply name.
>>>>  - Rename mali@ to gpu@.
>>>>
>>>> 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        |  30 ++++-
>>>>  arch/arm64/boot/dts/mediatek/mt8183-evb.dts   |   5 +
>>>>  .../arm64/boot/dts/mediatek/mt8183-kukui.dtsi |   5 +
>>>>  .../boot/dts/mediatek/mt8183-pumpkin.dts      |   5 +
>>>>  arch/arm64/boot/dts/mediatek/mt8183.dtsi      | 105 ++++++++++++++++++
>>>>  drivers/gpu/drm/panfrost/panfrost_devfreq.c   |   9 ++
>>>>  drivers/gpu/drm/panfrost/panfrost_drv.c       |  10 ++
>>>>  7 files changed, 168 insertions(+), 1 deletion(-)
>>>>
>>>
>>> Seems this version is ready to be applied if we get a review on the DT ?
>>>
>>> Mathias ? could you have a look ?
>>>
>>
>> Given Rob has Acked the DT bindings, I think it's OK to apply patches
>> 1, 3 and 4 via drm-misc, letting Mediatek people sort out the DT changes.
>>
>> My two unsolicited cents :-)

You make a convincing point - and if everyone is happy for the DT
changes to be handled separately I don't see a reason for the other
patches to be held up.

> Yeah sure, is there a panfrost maintainer in the room ? I can apply them if you ack me.

I seem to be applying most Panfrost changes these days, so I'll save you
the effort and push 1,3,4 to drm-misc-next.

Thanks,

Steve

Re: [PATCH v13 0/4] drm/panfrost: Add support for mt8183 GPU

[Nicolas Boichat]

On Fri, May 14, 2021 at 11:27 PM Steven Price <steven.price@arm.com> wrote:
> [snip]
> >>> Seems this version is ready to be applied if we get a review on the DT ?
> >>>
> >>> Mathias ? could you have a look ?
> >>>
> >>
> >> Given Rob has Acked the DT bindings, I think it's OK to apply patches
> >> 1, 3 and 4 via drm-misc, letting Mediatek people sort out the DT changes.
> >>
> >> My two unsolicited cents :-)
>
> You make a convincing point - and if everyone is happy for the DT
> changes to be handled separately I don't see a reason for the other
> patches to be held up.
>
> > Yeah sure, is there a panfrost maintainer in the room ? I can apply them if you ack me.
>
> I seem to be applying most Panfrost changes these days, so I'll save you
> the effort and push 1,3,4 to drm-misc-next.

Thanks Steve!!

>
> Thanks,
>
> Steve

Re: [PATCH v13 0/4] drm/panfrost: Add support for mt8183 GPU

[Neil Armstrong]

On 14/05/2021 17:27, Steven Price wrote:
> On 14/05/2021 15:48, Neil Armstrong wrote:
>> On 13/05/2021 16:55, Ezequiel Garcia wrote:
>>> Hi Neil,
>>>
>>> On Mon, 26 Apr 2021 at 06:59, Neil Armstrong <narmstrong@baylibre.com> wrote:
>>>>
>>>> Hi,
>>>>
>>>> On 21/04/2021 07:28, Nicolas Boichat wrote:
>>>>> Hi!
>>>>>
>>>>> This is just a rebase of the v11, untested (but it seems like
>>>>> Neil Armstrong recently tested it), with small changes in
>>>>> binding and dts. v11 cover follows:
>>>>>
>>>>> Follow-up on the v5 [1], things have gotten significantly
>>>>> better in the last year, 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 v13:
>>>>>  - devfreq: Fix conflict resolution mistake when rebasing, didn't
>>>>>    even compile. Oops.
>>>>>
>>>>> Changes in v12:
>>>>>  - binding: Fix min/maxItems logic (Rob Herring)
>>>>>  - Add gpu node to mt8183-pumpkin.dts as well (Neil Armstrong).
>>>>>
>>>>> Changes in v11:
>>>>>  - binding: power-domain-names not power-domainS-names
>>>>>  - mt8183*.dts: remove incorrect supply-names
>>>>>
>>>>> Changes in v10:
>>>>>  - Fix the binding to make sure sram-supply property can be provided.
>>>>>
>>>>> 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.
>>>>>  - Add gpu regulators to kukui dtsi as well.
>>>>>  - Power domains are now attached to spm, not scpsys
>>>>>  - Drop R-B.
>>>>>  - devfreq: New change
>>>>>  - Context conflicts, reflow the code.
>>>>>  - Use ARRAY_SIZE for power domains too.
>>>>>
>>>>> Changes in v5:
>>>>>  - Rename "2d" power domain to "core2"
>>>>>  - Rename "2d" power domain to "core2" (keep R-B again).
>>>>>  - Change power domain name from 2d to core2.
>>>>>
>>>>> Changes in v4:
>>>>>  - Add power-domain-names description
>>>>>    (kept Alyssa's reviewed-by as the change is minor)
>>>>>  - Add power-domain-names to describe the 3 domains.
>>>>>    (kept Alyssa's reviewed-by as the change is minor)
>>>>>  - 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.
>>>>>
>>>>> Changes in v2:
>>>>>  - Use sram instead of mali_sram as SRAM supply name.
>>>>>  - Rename mali@ to gpu@.
>>>>>
>>>>> 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        |  30 ++++-
>>>>>  arch/arm64/boot/dts/mediatek/mt8183-evb.dts   |   5 +
>>>>>  .../arm64/boot/dts/mediatek/mt8183-kukui.dtsi |   5 +
>>>>>  .../boot/dts/mediatek/mt8183-pumpkin.dts      |   5 +
>>>>>  arch/arm64/boot/dts/mediatek/mt8183.dtsi      | 105 ++++++++++++++++++
>>>>>  drivers/gpu/drm/panfrost/panfrost_devfreq.c   |   9 ++
>>>>>  drivers/gpu/drm/panfrost/panfrost_drv.c       |  10 ++
>>>>>  7 files changed, 168 insertions(+), 1 deletion(-)
>>>>>
>>>>
>>>> Seems this version is ready to be applied if we get a review on the DT ?
>>>>
>>>> Mathias ? could you have a look ?
>>>>
>>>
>>> Given Rob has Acked the DT bindings, I think it's OK to apply patches
>>> 1, 3 and 4 via drm-misc, letting Mediatek people sort out the DT changes.
>>>
>>> My two unsolicited cents :-)
> 
> You make a convincing point - and if everyone is happy for the DT
> changes to be handled separately I don't see a reason for the other
> patches to be held up.
> 
>> Yeah sure, is there a panfrost maintainer in the room ? I can apply them if you ack me.
> 
> I seem to be applying most Panfrost changes these days, so I'll save you
> the effort and push 1,3,4 to drm-misc-next.

Thanks !

Neil

> 
> Thanks,
> 
> Steve
>