[PATCH v4 0/4] arm64: dts: qcom: sm8250: fix display nodes

[PATCH v4 0/4] arm64: dts: qcom: sm8250: fix display nodes

[Dmitry Baryshkov]

This is a series of patches developed by Jonathan Marek, and picked up
to split them, so that dts fixes can be picked up into stable branch

Add sm8150/sm8250 compatibles to drm/msm and fix the sm8250
display nodes.

v2: do not remove mmcx-supply from dispcc node
v3: remove references to dp_phy (missed this in v2, sorry for the spam)
v4: split patches to let fixes be picked up into stable branch

----------------------------------------------------------------
Jonathan Marek (4):
      arm64: dts: qcom: sm8250: fix display nodes
      dt-bindings: msm/disp: add compatibles for sm8150/sm8250 display
      drm/msm: add compatibles for sm8150/sm8250 display
      arm64: dts: qcom: sm8250: fix display nodes

 Documentation/devicetree/bindings/display/msm/dpu.txt |  4 ++--
 arch/arm64/boot/dts/qcom/sm8250.dtsi                  | 31 ++++++++-----------------------
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c               |  2 ++
 drivers/gpu/drm/msm/msm_drv.c                         |  6 +++---
 4 files changed, 15 insertions(+), 28 deletions(-)

[PATCH v4 1/4] arm64: dts: qcom: sm8250: fix display nodes

[Dmitry Baryshkov]

From: Jonathan Marek <jonathan@marek.ca>

Apply these fixes to the newly added sm8250 display ndoes
 - Remove "notused" interconnect (which apparently was blindly copied from
   my old patches)
 - Use dispcc node example from dt-bindings, removing clocks which aren't
   documented or used by the driver and fixing the region size.

Fixes: 7c1dffd471b1 ("arm64: dts: qcom: sm8250.dtsi: add display system nodes")
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
[DB: compatibility changes split into separate patch]
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 arch/arm64/boot/dts/qcom/sm8250.dtsi | 27 ++++++---------------------
 1 file changed, 6 insertions(+), 21 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sm8250.dtsi b/arch/arm64/boot/dts/qcom/sm8250.dtsi
index 947e1accae3a..32f0d6a82457 100644
--- a/arch/arm64/boot/dts/qcom/sm8250.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8250.dtsi
@@ -2327,10 +2327,9 @@ mdss: mdss@ae00000 {
 			reg = <0 0x0ae00000 0 0x1000>;
 			reg-names = "mdss";
 
-			interconnects = <&gem_noc MASTER_AMPSS_M0 &config_noc SLAVE_DISPLAY_CFG>,
-					<&mmss_noc MASTER_MDP_PORT0 &mc_virt SLAVE_EBI_CH0>,
+			interconnects = <&mmss_noc MASTER_MDP_PORT0 &mc_virt SLAVE_EBI_CH0>,
 					<&mmss_noc MASTER_MDP_PORT1 &mc_virt SLAVE_EBI_CH0>;
-			interconnect-names = "notused", "mdp0-mem", "mdp1-mem";
+			interconnect-names = "mdp0-mem", "mdp1-mem";
 
 			power-domains = <&dispcc MDSS_GDSC>;
 
@@ -2580,7 +2579,7 @@ opp-358000000 {
 
 		dispcc: clock-controller@af00000 {
 			compatible = "qcom,sm8250-dispcc";
-			reg = <0 0x0af00000 0 0x20000>;
+			reg = <0 0x0af00000 0 0x10000>;
 			mmcx-supply = <&mmcx_reg>;
 			clocks = <&rpmhcc RPMH_CXO_CLK>,
 				 <&dsi0_phy 0>,
@@ -2588,28 +2587,14 @@ dispcc: clock-controller@af00000 {
 				 <&dsi1_phy 0>,
 				 <&dsi1_phy 1>,
 				 <0>,
-				 <0>,
-				 <0>,
-				 <0>,
-				 <0>,
-				 <0>,
-				 <0>,
-				 <0>,
-				 <&sleep_clk>;
+				 <0>;
 			clock-names = "bi_tcxo",
 				      "dsi0_phy_pll_out_byteclk",
 				      "dsi0_phy_pll_out_dsiclk",
 				      "dsi1_phy_pll_out_byteclk",
 				      "dsi1_phy_pll_out_dsiclk",
-				      "dp_link_clk_divsel_ten",
-				      "dp_vco_divided_clk_src_mux",
-				      "dptx1_phy_pll_link_clk",
-				      "dptx1_phy_pll_vco_div_clk",
-				      "dptx2_phy_pll_link_clk",
-				      "dptx2_phy_pll_vco_div_clk",
-				      "edp_phy_pll_link_clk",
-				      "edp_phy_pll_vco_div_clk",
-				      "sleep_clk";
+				      "dp_phy_pll_link_clk",
+				      "dp_phy_pll_vco_div_clk";
 			#clock-cells = <1>;
 			#reset-cells = <1>;
 			#power-domain-cells = <1>;
-- 
2.30.2

[PATCH v4 2/4] dt-bindings: msm/disp: add compatibles for sm8150/sm8250 display

[Dmitry Baryshkov]

From: Jonathan Marek <jonathan@marek.ca>

The driver already has support for sm8150/sm8250, but the compatibles were
never added.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Acked-by: Rob Herring <robh@kernel.org>
[DB: split dt-bindings into separate patch]
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 Documentation/devicetree/bindings/display/msm/dpu.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/msm/dpu.txt b/Documentation/devicetree/bindings/display/msm/dpu.txt
index 551ae26f60da..5763f43200a0 100644
--- a/Documentation/devicetree/bindings/display/msm/dpu.txt
+++ b/Documentation/devicetree/bindings/display/msm/dpu.txt
@@ -8,7 +8,7 @@ The DPU display controller is found in SDM845 SoC.
 
 MDSS:
 Required properties:
-- compatible:  "qcom,sdm845-mdss", "qcom,sc7180-mdss"
+- compatible:  "qcom,sdm845-mdss", "qcom,sc7180-mdss", "qcom,sm8150-mdss", "qcom,sm8250-mdss"
 - reg: physical base address and length of contoller's registers.
 - reg-names: register region names. The following region is required:
   * "mdss"
@@ -41,7 +41,7 @@ Optional properties:
 
 MDP:
 Required properties:
-- compatible: "qcom,sdm845-dpu", "qcom,sc7180-dpu"
+- compatible: "qcom,sdm845-dpu", "qcom,sc7180-dpu", "qcom,sm8150-dpu", "qcom,sm8250-dpu"
 - reg: physical base address and length of controller's registers.
 - reg-names : register region names. The following region is required:
   * "mdp"
-- 
2.30.2

[PATCH v4 3/4] drm/msm: add compatibles for sm8150/sm8250 display

[Dmitry Baryshkov]

From: Jonathan Marek <jonathan@marek.ca>

The driver already has support for sm8150/sm8250, but the compatibles were
never added.

Also inverse the non-mdp4 condition in add_display_components() to avoid
having to check every new compatible in the condition.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 2 ++
 drivers/gpu/drm/msm/msm_drv.c           | 6 +++---
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 5a8e3e1fc48c..fff12a4c8bfc 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -1219,6 +1219,8 @@ static const struct dev_pm_ops dpu_pm_ops = {
 static const struct of_device_id dpu_dt_match[] = {
 	{ .compatible = "qcom,sdm845-dpu", },
 	{ .compatible = "qcom,sc7180-dpu", },
+	{ .compatible = "qcom,sm8150-dpu", },
+	{ .compatible = "qcom,sm8250-dpu", },
 	{}
 };
 MODULE_DEVICE_TABLE(of, dpu_dt_match);
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 94525ac76d4e..928f13d4bfbc 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -1185,9 +1185,7 @@ static int add_display_components(struct device *dev,
 	 * Populate the children devices, find the MDP5/DPU node, and then add
 	 * the interfaces to our components list.
 	 */
-	if (of_device_is_compatible(dev->of_node, "qcom,mdss") ||
-	    of_device_is_compatible(dev->of_node, "qcom,sdm845-mdss") ||
-	    of_device_is_compatible(dev->of_node, "qcom,sc7180-mdss")) {
+	if (!of_device_is_compatible(dev->of_node, "qcom,mdp4")) {
 		ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
 		if (ret) {
 			DRM_DEV_ERROR(dev, "failed to populate children devices\n");
@@ -1320,6 +1318,8 @@ static const struct of_device_id dt_match[] = {
 	{ .compatible = "qcom,mdss", .data = (void *)KMS_MDP5 },
 	{ .compatible = "qcom,sdm845-mdss", .data = (void *)KMS_DPU },
 	{ .compatible = "qcom,sc7180-mdss", .data = (void *)KMS_DPU },
+	{ .compatible = "qcom,sm8150-mdss", .data = (void *)KMS_DPU },
+	{ .compatible = "qcom,sm8250-mdss", .data = (void *)KMS_DPU },
 	{}
 };
 MODULE_DEVICE_TABLE(of, dt_match);
-- 
2.30.2

[PATCH v4 4/4] arm64: dts: qcom: sm8250: fix display nodes

[Dmitry Baryshkov]

From: Jonathan Marek <jonathan@marek.ca>

 - Use sm8250 compatibles instead of sdm845 compatibles

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 arch/arm64/boot/dts/qcom/sm8250.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sm8250.dtsi b/arch/arm64/boot/dts/qcom/sm8250.dtsi
index 32f0d6a82457..693ac533f9b6 100644
--- a/arch/arm64/boot/dts/qcom/sm8250.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8250.dtsi
@@ -2323,7 +2323,7 @@ usb_2_dwc3: dwc3@a800000 {
 		};
 
 		mdss: mdss@ae00000 {
-			compatible = "qcom,sdm845-mdss";
+			compatible = "qcom,sm8250-mdss";
 			reg = <0 0x0ae00000 0 0x1000>;
 			reg-names = "mdss";
 
@@ -2355,7 +2355,7 @@ mdss: mdss@ae00000 {
 			ranges;
 
 			mdss_mdp: mdp@ae01000 {
-				compatible = "qcom,sdm845-dpu";
+				compatible = "qcom,sm8250-dpu";
 				reg = <0 0x0ae01000 0 0x8f000>,
 				      <0 0x0aeb0000 0 0x2008>;
 				reg-names = "mdp", "vbif";
-- 
2.30.2

Re: [PATCH v4 3/4] drm/msm: add compatibles for sm8150/sm8250 display

[Stephen Boyd]

Quoting Dmitry Baryshkov (2021-03-29 05:00:50)
> From: Jonathan Marek <jonathan@marek.ca>
> 
> The driver already has support for sm8150/sm8250, but the compatibles were
> never added.
> 
> Also inverse the non-mdp4 condition in add_display_components() to avoid
> having to check every new compatible in the condition.
> 
> Signed-off-by: Jonathan Marek <jonathan@marek.ca>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---

Reviewed-by: Stephen Boyd <swboyd@chromium.org>

Re: [PATCH v4 2/4] dt-bindings: msm/disp: add compatibles for sm8150/sm8250 display

[Stephen Boyd]

Quoting Dmitry Baryshkov (2021-03-29 05:00:49)
> From: Jonathan Marek <jonathan@marek.ca>
> 
> The driver already has support for sm8150/sm8250, but the compatibles were
> never added.
> 
> Signed-off-by: Jonathan Marek <jonathan@marek.ca>
> Acked-by: Rob Herring <robh@kernel.org>
> [DB: split dt-bindings into separate patch]
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---

Reviewed-by: Stephen Boyd <swboyd@chromium.org>

This will conflict with the yaml changes to this file that are also in
flight.

Re: [PATCH v4 4/4] arm64: dts: qcom: sm8250: fix display nodes

[Stephen Boyd]

Quoting Dmitry Baryshkov (2021-03-29 05:00:51)
> From: Jonathan Marek <jonathan@marek.ca>
> 
>  - Use sm8250 compatibles instead of sdm845 compatibles
> 

Does it need the " - " prefix?

> Signed-off-by: Jonathan Marek <jonathan@marek.ca>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---

Reviewed-by: Stephen Boyd <swboyd@chromium.org>

Re: [PATCH v4 3/4] drm/msm: add compatibles for sm8150/sm8250 display

[Bjorn Andersson]

On Mon 29 Mar 07:00 CDT 2021, Dmitry Baryshkov wrote:

> From: Jonathan Marek <jonathan@marek.ca>
> 
> The driver already has support for sm8150/sm8250, but the compatibles were
> never added.
> 
> Also inverse the non-mdp4 condition in add_display_components() to avoid
> having to check every new compatible in the condition.
> 
> Signed-off-by: Jonathan Marek <jonathan@marek.ca>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 2 ++
>  drivers/gpu/drm/msm/msm_drv.c           | 6 +++---
>  2 files changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> index 5a8e3e1fc48c..fff12a4c8bfc 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> @@ -1219,6 +1219,8 @@ static const struct dev_pm_ops dpu_pm_ops = {
>  static const struct of_device_id dpu_dt_match[] = {
>  	{ .compatible = "qcom,sdm845-dpu", },
>  	{ .compatible = "qcom,sc7180-dpu", },
> +	{ .compatible = "qcom,sm8150-dpu", },
> +	{ .compatible = "qcom,sm8250-dpu", },
>  	{}
>  };
>  MODULE_DEVICE_TABLE(of, dpu_dt_match);
> diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
> index 94525ac76d4e..928f13d4bfbc 100644
> --- a/drivers/gpu/drm/msm/msm_drv.c
> +++ b/drivers/gpu/drm/msm/msm_drv.c
> @@ -1185,9 +1185,7 @@ static int add_display_components(struct device *dev,
>  	 * Populate the children devices, find the MDP5/DPU node, and then add
>  	 * the interfaces to our components list.
>  	 */
> -	if (of_device_is_compatible(dev->of_node, "qcom,mdss") ||
> -	    of_device_is_compatible(dev->of_node, "qcom,sdm845-mdss") ||
> -	    of_device_is_compatible(dev->of_node, "qcom,sc7180-mdss")) {
> +	if (!of_device_is_compatible(dev->of_node, "qcom,mdp4")) {

Please consider reviewing my proposed alternative solution for this
hunk:

https://lore.kernel.org/linux-arm-msm/20210317025634.3987908-1-bjorn.andersson@linaro.org/

For the rest

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

>  		ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
>  		if (ret) {
>  			DRM_DEV_ERROR(dev, "failed to populate children devices\n");
> @@ -1320,6 +1318,8 @@ static const struct of_device_id dt_match[] = {
>  	{ .compatible = "qcom,mdss", .data = (void *)KMS_MDP5 },
>  	{ .compatible = "qcom,sdm845-mdss", .data = (void *)KMS_DPU },
>  	{ .compatible = "qcom,sc7180-mdss", .data = (void *)KMS_DPU },
> +	{ .compatible = "qcom,sm8150-mdss", .data = (void *)KMS_DPU },
> +	{ .compatible = "qcom,sm8250-mdss", .data = (void *)KMS_DPU },
>  	{}
>  };
>  MODULE_DEVICE_TABLE(of, dt_match);
> -- 
> 2.30.2
> 

Re: [PATCH v4 3/4] drm/msm: add compatibles for sm8150/sm8250 display

[Bjorn Andersson]

On Mon 29 Mar 07:00 CDT 2021, Dmitry Baryshkov wrote:

> From: Jonathan Marek <jonathan@marek.ca>
> 
> The driver already has support for sm8150/sm8250, but the compatibles were
> never added.
> 
> Also inverse the non-mdp4 condition in add_display_components() to avoid
> having to check every new compatible in the condition.
> 
> Signed-off-by: Jonathan Marek <jonathan@marek.ca>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

Rob, will you pick patch 2 and 3 for 5.13?

I've picked patch 1 and would like to pick patch 4 through my tree...

Regards,
Bjorn

> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 2 ++
>  drivers/gpu/drm/msm/msm_drv.c           | 6 +++---
>  2 files changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> index 5a8e3e1fc48c..fff12a4c8bfc 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> @@ -1219,6 +1219,8 @@ static const struct dev_pm_ops dpu_pm_ops = {
>  static const struct of_device_id dpu_dt_match[] = {
>  	{ .compatible = "qcom,sdm845-dpu", },
>  	{ .compatible = "qcom,sc7180-dpu", },
> +	{ .compatible = "qcom,sm8150-dpu", },
> +	{ .compatible = "qcom,sm8250-dpu", },
>  	{}
>  };
>  MODULE_DEVICE_TABLE(of, dpu_dt_match);
> diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
> index 94525ac76d4e..928f13d4bfbc 100644
> --- a/drivers/gpu/drm/msm/msm_drv.c
> +++ b/drivers/gpu/drm/msm/msm_drv.c
> @@ -1185,9 +1185,7 @@ static int add_display_components(struct device *dev,
>  	 * Populate the children devices, find the MDP5/DPU node, and then add
>  	 * the interfaces to our components list.
>  	 */
> -	if (of_device_is_compatible(dev->of_node, "qcom,mdss") ||
> -	    of_device_is_compatible(dev->of_node, "qcom,sdm845-mdss") ||
> -	    of_device_is_compatible(dev->of_node, "qcom,sc7180-mdss")) {
> +	if (!of_device_is_compatible(dev->of_node, "qcom,mdp4")) {
>  		ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
>  		if (ret) {
>  			DRM_DEV_ERROR(dev, "failed to populate children devices\n");
> @@ -1320,6 +1318,8 @@ static const struct of_device_id dt_match[] = {
>  	{ .compatible = "qcom,mdss", .data = (void *)KMS_MDP5 },
>  	{ .compatible = "qcom,sdm845-mdss", .data = (void *)KMS_DPU },
>  	{ .compatible = "qcom,sc7180-mdss", .data = (void *)KMS_DPU },
> +	{ .compatible = "qcom,sm8150-mdss", .data = (void *)KMS_DPU },
> +	{ .compatible = "qcom,sm8250-mdss", .data = (void *)KMS_DPU },
>  	{}
>  };
>  MODULE_DEVICE_TABLE(of, dt_match);
> -- 
> 2.30.2
> 

Re: [PATCH v4 3/4] drm/msm: add compatibles for sm8150/sm8250 display

[Dmitry Baryshkov]

On Tue, 30 Mar 2021 at 06:16, Bjorn Andersson
<bjorn.andersson@linaro.org> wrote:
>
> On Mon 29 Mar 07:00 CDT 2021, Dmitry Baryshkov wrote:
>
> > From: Jonathan Marek <jonathan@marek.ca>
> >
> > The driver already has support for sm8150/sm8250, but the compatibles were
> > never added.
> >
> > Also inverse the non-mdp4 condition in add_display_components() to avoid
> > having to check every new compatible in the condition.
> >
> > Signed-off-by: Jonathan Marek <jonathan@marek.ca>
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> > ---
> >  drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 2 ++
> >  drivers/gpu/drm/msm/msm_drv.c           | 6 +++---
> >  2 files changed, 5 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> > index 5a8e3e1fc48c..fff12a4c8bfc 100644
> > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> > @@ -1219,6 +1219,8 @@ static const struct dev_pm_ops dpu_pm_ops = {
> >  static const struct of_device_id dpu_dt_match[] = {
> >       { .compatible = "qcom,sdm845-dpu", },
> >       { .compatible = "qcom,sc7180-dpu", },
> > +     { .compatible = "qcom,sm8150-dpu", },
> > +     { .compatible = "qcom,sm8250-dpu", },
> >       {}
> >  };
> >  MODULE_DEVICE_TABLE(of, dpu_dt_match);
> > diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
> > index 94525ac76d4e..928f13d4bfbc 100644
> > --- a/drivers/gpu/drm/msm/msm_drv.c
> > +++ b/drivers/gpu/drm/msm/msm_drv.c
> > @@ -1185,9 +1185,7 @@ static int add_display_components(struct device *dev,
> >        * Populate the children devices, find the MDP5/DPU node, and then add
> >        * the interfaces to our components list.
> >        */
> > -     if (of_device_is_compatible(dev->of_node, "qcom,mdss") ||
> > -         of_device_is_compatible(dev->of_node, "qcom,sdm845-mdss") ||
> > -         of_device_is_compatible(dev->of_node, "qcom,sc7180-mdss")) {
> > +     if (!of_device_is_compatible(dev->of_node, "qcom,mdp4")) {
>
> Please consider reviewing my proposed alternative solution for this
> hunk:
>
> https://lore.kernel.org/linux-arm-msm/20210317025634.3987908-1-bjorn.andersson@linaro.org/

I'd slightly prefer Jonathan's approach, as it seems simpler, but no
strong preference towards one or another.

>
> For the rest
>
> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
>
> Regards,
> Bjorn
>
> >               ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
> >               if (ret) {
> >                       DRM_DEV_ERROR(dev, "failed to populate children devices\n");
> > @@ -1320,6 +1318,8 @@ static const struct of_device_id dt_match[] = {
> >       { .compatible = "qcom,mdss", .data = (void *)KMS_MDP5 },
> >       { .compatible = "qcom,sdm845-mdss", .data = (void *)KMS_DPU },
> >       { .compatible = "qcom,sc7180-mdss", .data = (void *)KMS_DPU },
> > +     { .compatible = "qcom,sm8150-mdss", .data = (void *)KMS_DPU },
> > +     { .compatible = "qcom,sm8250-mdss", .data = (void *)KMS_DPU },
> >       {}
> >  };
> >  MODULE_DEVICE_TABLE(of, dt_match);
> > --
> > 2.30.2
> >



-- 
With best wishes
Dmitry