[PATCH v3 0/4] Add support for the eDP panel on sc7280 CRD

[PATCH v3 0/4] Add support for the eDP panel on sc7280 CRD

[Sankeerth Billakanti]

Add support for the eDP panel on sc7280 CRD platform. The eDP panel does
not need HPD line for connect disconnect. So, this series will report eDP
as always connected. The driver needs to register for IRQ_HPD only for eDP.
This support will be added later.

These changes are dependent on the following series:
https://patchwork.kernel.org/project/linux-arm-msm/list/?series=586263&archive=both&state=*
https://patchwork.kernel.org/project/linux-arm-msm/list/?series=560587&state=%2A&archive=both


Sankeerth Billakanti (4):
  dt-bindings: display: simple: Add sharp LQ140M1JW46 panel
  arm64: dts: qcom: sc7280: Add support for eDP panel on CRD
  drm/panel-edp: Add eDP sharp panel support
  drm/msm/dp: Add driver support to utilize drm panel

 .../bindings/display/panel/panel-simple.yaml       |   2 +
 arch/arm64/boot/dts/qcom/sc7280-crd.dts            | 122 +++++++++++++++++++++
 arch/arm64/boot/dts/qcom/sc7280.dtsi               |   2 +-
 drivers/gpu/drm/msm/dp/dp_display.c                |   8 ++
 drivers/gpu/drm/msm/dp/dp_drm.c                    |  54 ++++++++-
 drivers/gpu/drm/msm/dp/dp_parser.h                 |   3 +
 drivers/gpu/drm/panel/panel-edp.c                  |  31 ++++++
 7 files changed, 216 insertions(+), 6 deletions(-)

-- 
2.7.4

[PATCH v3 1/4] dt-bindings: display: simple: Add sharp LQ140M1JW46 panel

[Sankeerth Billakanti]

Add support for sharp LQ140M1JW46 display panel. It is a 14" eDP panel
with 1920x1080 display resolution.

Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
---

Changes in v3:
  None

 Documentation/devicetree/bindings/display/panel/panel-simple.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
index 9cf5588..1eb9dd4 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
@@ -284,6 +284,8 @@ properties:
       - sharp,lq101k1ly04
         # Sharp 12.3" (2400x1600 pixels) TFT LCD panel
       - sharp,lq123p1jx31
+        # Sharp 14" (1920x1080 pixels) TFT LCD panel
+      - sharp,lq140m1jw46
         # Sharp LS020B1DD01D 2.0" HQVGA TFT LCD panel
       - sharp,ls020b1dd01d
         # Shelly SCA07010-BFN-LNN 7.0" WVGA TFT LCD panel
-- 
2.7.4

Re: [PATCH v3 1/4] dt-bindings: display: simple: Add sharp LQ140M1JW46 panel

[Rob Herring]

On Wed, 09 Feb 2022 14:25:29 +0530, Sankeerth Billakanti wrote:
> Add support for sharp LQ140M1JW46 display panel. It is a 14" eDP panel
> with 1920x1080 display resolution.
> 
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
> ---
> 
> Changes in v3:
>   None
> 
>  Documentation/devicetree/bindings/display/panel/panel-simple.yaml | 2 ++
>  1 file changed, 2 insertions(+)
> 

Acked-by: Rob Herring <robh@kernel.org>

Re: [PATCH v3 1/4] dt-bindings: display: simple: Add sharp LQ140M1JW46 panel

[Stephen Boyd]

Quoting Sankeerth Billakanti (2022-02-09 00:55:29)
> Add support for sharp LQ140M1JW46 display panel. It is a 14" eDP panel
> with 1920x1080 display resolution.
>
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
> ---

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

[PATCH v3 2/4] arm64: dts: qcom: sc7280: Add support for eDP panel on CRD

[Sankeerth Billakanti]

Enable the eDP display panel support without HPD on sc7280 platform.

Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
---

Changes in v3:
  - Sort the nodes alphabetically
  - Use - instead of _ as node names
  - Place the backlight and panel nodes under root
  - Change the name of edp_out to mdss_edp_out
  - Change the names of regulator nodes
  - Delete unused properties in the board file


Changes in v2:
  - Sort node references alphabetically
  - Improve readability
  - Move the pwm pinctrl to pwm node
  - Move the regulators to root
  - Define backlight power
  - Remove dummy regulator node
  - Cleanup pinctrl definitions

 arch/arm64/boot/dts/qcom/sc7280-crd.dts | 122 ++++++++++++++++++++++++++++++++
 arch/arm64/boot/dts/qcom/sc7280.dtsi    |   2 +-
 2 files changed, 123 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sc7280-crd.dts b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
index e2efbdd..2a490a0 100644
--- a/arch/arm64/boot/dts/qcom/sc7280-crd.dts
+++ b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
@@ -21,6 +21,59 @@
 	chosen {
 		stdout-path = "serial0:115200n8";
 	};
+
+	backlight_3v3_regulator: backlight-3v3-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "backlight_3v3_regulator";
+
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpio = <&pm8350c_gpios 7 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&edp_bl_power>;
+	};
+
+	edp_3v3_regulator: edp-3v3-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "edp_3v3_regulator";
+
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpio = <&tlmm 80 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&edp_panel_power>;
+	};
+
+	edp_backlight: edp-backlight {
+		compatible = "pwm-backlight";
+
+		power-supply = <&backlight_3v3_regulator>;
+		pwms = <&pm8350c_pwm 3 65535>;
+	};
+
+	edp_panel: edp-panel {
+		compatible = "sharp,lq140m1jw46";
+
+		power-supply = <&edp_3v3_regulator>;
+		backlight = <&edp_backlight>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			port@0 {
+				reg = <0>;
+				edp_panel_in: endpoint {
+					remote-endpoint = <&edp_out>;
+				};
+			};
+		};
+	};
 };
 
 &apps_rsc {
@@ -76,6 +129,44 @@ ap_ts_pen_1v8: &i2c13 {
 	};
 };
 
+&mdss {
+	status = "okay";
+};
+
+&mdss_dp {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&dp_hot_plug_det>;
+	data-lanes = <0 1>;
+	vdda-1p2-supply = <&vreg_l6b_1p2>;
+	vdda-0p9-supply = <&vreg_l1b_0p8>;
+};
+
+&mdss_edp {
+	status = "okay";
+
+	vdda-1p2-supply = <&vreg_l6b_1p2>;
+	vdda-0p9-supply = <&vreg_l10c_0p8>;
+	/delete-property/ pinctrl-names;
+	/delete-property/ pinctrl-0;
+};
+
+&mdss_edp_out {
+	remote-endpoint = <&edp_panel_in>;
+};
+
+&mdss_edp_phy {
+	status = "okay";
+
+	vdda-1p2-supply = <&vreg_l6b_1p2>;
+	vdda-0p9-supply = <&vreg_l10c_0p8>;
+};
+
+&mdss_mdp {
+	status = "okay";
+};
+
 &nvme_3v3_regulator {
 	gpio = <&tlmm 51 GPIO_ACTIVE_HIGH>;
 };
@@ -84,7 +175,38 @@ ap_ts_pen_1v8: &i2c13 {
 	pins = "gpio51";
 };
 
+&pm8350c_gpios {
+	edp_bl_power: edp-bl-power {
+		pins = "gpio7";
+		function = "normal";
+		qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
+		bias-disable;
+		output-low;
+	};
+
+	edp_bl_pwm: edp-bl-pwm {
+		pins = "gpio8";
+		function = "func1";
+		qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
+		bias-disable;
+		output-low;
+	};
+};
+
+&pm8350c_pwm {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&edp_bl_pwm>;
+};
+
 &tlmm {
+	edp_panel_power: edp-panel-power {
+		pins = "gpio80";
+		function = "gpio";
+		bias-pull-down;
+	};
+
 	tp_int_odl: tp-int-odl {
 		pins = "gpio7";
 		function = "gpio";
diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
index 3572399..eca403a 100644
--- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
@@ -3066,7 +3066,7 @@
 
 					port@1 {
 						reg = <1>;
-						edp_out: endpoint { };
+						mdss_edp_out: endpoint { };
 					};
 				};
 
-- 
2.7.4

Re: [PATCH v3 2/4] arm64: dts: qcom: sc7280: Add support for eDP panel on CRD

[Stephen Boyd]

Quoting Sankeerth Billakanti (2022-02-09 00:55:30)
> Enable the eDP display panel support without HPD on sc7280 platform.
>
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
> ---
>
> Changes in v3:
>   - Sort the nodes alphabetically
>   - Use - instead of _ as node names
>   - Place the backlight and panel nodes under root
>   - Change the name of edp_out to mdss_edp_out
>   - Change the names of regulator nodes
>   - Delete unused properties in the board file
>
>
> Changes in v2:
>   - Sort node references alphabetically
>   - Improve readability
>   - Move the pwm pinctrl to pwm node
>   - Move the regulators to root
>   - Define backlight power
>   - Remove dummy regulator node
>   - Cleanup pinctrl definitions
>
>  arch/arm64/boot/dts/qcom/sc7280-crd.dts | 122 ++++++++++++++++++++++++++++++++
>  arch/arm64/boot/dts/qcom/sc7280.dtsi    |   2 +-
>  2 files changed, 123 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/qcom/sc7280-crd.dts b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> index e2efbdd..2a490a0 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> @@ -21,6 +21,59 @@
>         chosen {
>                 stdout-path = "serial0:115200n8";
>         };
> +
> +       backlight_3v3_regulator: backlight-3v3-regulator {
> +               compatible = "regulator-fixed";
> +               regulator-name = "backlight_3v3_regulator";
> +
> +               regulator-min-microvolt = <3300000>;
> +               regulator-max-microvolt = <3300000>;
> +
> +               gpio = <&pm8350c_gpios 7 GPIO_ACTIVE_HIGH>;
> +               enable-active-high;
> +
> +               pinctrl-names = "default";
> +               pinctrl-0 = <&edp_bl_power>;
> +       };
> +
> +       edp_3v3_regulator: edp-3v3-regulator {
> +               compatible = "regulator-fixed";
> +               regulator-name = "edp_3v3_regulator";
> +
> +               regulator-min-microvolt = <3300000>;
> +               regulator-max-microvolt = <3300000>;
> +
> +               gpio = <&tlmm 80 GPIO_ACTIVE_HIGH>;
> +               enable-active-high;
> +
> +               pinctrl-names = "default";
> +               pinctrl-0 = <&edp_panel_power>;
> +       };
> +
> +       edp_backlight: edp-backlight {
> +               compatible = "pwm-backlight";
> +
> +               power-supply = <&backlight_3v3_regulator>;
> +               pwms = <&pm8350c_pwm 3 65535>;
> +       };
> +
> +       edp_panel: edp-panel {
> +               compatible = "sharp,lq140m1jw46";
> +
> +               power-supply = <&edp_3v3_regulator>;
> +               backlight = <&edp_backlight>;
> +
> +               ports {
> +                       #address-cells = <1>;
> +                       #size-cells = <0>;
> +                       port@0 {
> +                               reg = <0>;
> +                               edp_panel_in: endpoint {
> +                                       remote-endpoint = <&edp_out>;

Where is edp_out now?

> +                               };
> +                       };
> +               };
> +       };
>  };
>
>  &apps_rsc {
> @@ -76,6 +129,44 @@ ap_ts_pen_1v8: &i2c13 {
>         };
>  };
>
> +&mdss {
> +       status = "okay";
> +};
> +
> +&mdss_dp {
> +       status = "okay";
> +
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&dp_hot_plug_det>;
> +       data-lanes = <0 1>;
> +       vdda-1p2-supply = <&vreg_l6b_1p2>;
> +       vdda-0p9-supply = <&vreg_l1b_0p8>;
> +};
> +
> +&mdss_edp {
> +       status = "okay";
> +
> +       vdda-1p2-supply = <&vreg_l6b_1p2>;
> +       vdda-0p9-supply = <&vreg_l10c_0p8>;
> +       /delete-property/ pinctrl-names;
> +       /delete-property/ pinctrl-0;
> +};
> +
> +&mdss_edp_out {
> +       remote-endpoint = <&edp_panel_in>;
> +};
> +
> +&mdss_edp_phy {
> +       status = "okay";
> +
> +       vdda-1p2-supply = <&vreg_l6b_1p2>;
> +       vdda-0p9-supply = <&vreg_l10c_0p8>;
> +};
> +
> +&mdss_mdp {
> +       status = "okay";
> +};
> +
>  &nvme_3v3_regulator {
>         gpio = <&tlmm 51 GPIO_ACTIVE_HIGH>;
>  };
> @@ -84,7 +175,38 @@ ap_ts_pen_1v8: &i2c13 {
>         pins = "gpio51";
>  };
>
> +&pm8350c_gpios {
> +       edp_bl_power: edp-bl-power {
> +               pins = "gpio7";
> +               function = "normal";
> +               qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
> +               bias-disable;
> +               output-low;

Is the 'output-low' necessary?

> +       };
> +
> +       edp_bl_pwm: edp-bl-pwm {
> +               pins = "gpio8";
> +               function = "func1";
> +               qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
> +               bias-disable;
> +               output-low;

Same question.

> +       };
> +};
> +
> +&pm8350c_pwm {
> +       status = "okay";
> +
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&edp_bl_pwm>;
> +};
> +
>  &tlmm {
> +       edp_panel_power: edp-panel-power {
> +               pins = "gpio80";
> +               function = "gpio";
> +               bias-pull-down;
> +       };
> +
>         tp_int_odl: tp-int-odl {
>                 pins = "gpio7";
>                 function = "gpio";
> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> index 3572399..eca403a 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> @@ -3066,7 +3066,7 @@
>
>                                         port@1 {
>                                                 reg = <1>;
> -                                               edp_out: endpoint { };
> +                                               mdss_edp_out: endpoint { };
>                                         };

It feels like this should be a different patch for this phandle rename.

RE: [PATCH v3 2/4] arm64: dts: qcom: sc7280: Add support for eDP panel on CRD

[Sankeerth Billakanti (QUIC)]

Hi Stephen,
Will implement all the suggested changes.

Thank you,
Sankeerth

-----Original Message-----
From: Stephen Boyd <swboyd@chromium.org> 
Sent: Thursday, February 10, 2022 6:45 AM
To: Sankeerth Billakanti (QUIC) <quic_sbillaka@quicinc.com>; agross@kernel.org; airlied@linux.ie; bjorn.andersson@linaro.org; daniel@ffwll.ch; devicetree@vger.kernel.org; dianders@chromium.org; dri-devel@lists.freedesktop.org; freedreno@lists.freedesktop.org; krzysztof.kozlowski@canonical.com; linux-arm-msm@vger.kernel.org; linux-kernel@vger.kernel.org; robdclark@gmail.com; robh+dt@kernel.org; sam@ravnborg.org; seanpaul@chromium.org; thierry.reding@gmail.com
Cc: quic_kalyant <quic_kalyant@quicinc.com>; Abhinav Kumar (QUIC) <quic_abhinavk@quicinc.com>; Kuogee Hsieh (QUIC) <quic_khsieh@quicinc.com>; quic_mkrishn <quic_mkrishn@quicinc.com>; quic_vproddut <quic_vproddut@quicinc.com>
Subject: Re: [PATCH v3 2/4] arm64: dts: qcom: sc7280: Add support for eDP panel on CRD

Quoting Sankeerth Billakanti (2022-02-09 00:55:30)
> Enable the eDP display panel support without HPD on sc7280 platform.
>
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
> ---
>
> Changes in v3:
>   - Sort the nodes alphabetically
>   - Use - instead of _ as node names
>   - Place the backlight and panel nodes under root
>   - Change the name of edp_out to mdss_edp_out
>   - Change the names of regulator nodes
>   - Delete unused properties in the board file
>
>
> Changes in v2:
>   - Sort node references alphabetically
>   - Improve readability
>   - Move the pwm pinctrl to pwm node
>   - Move the regulators to root
>   - Define backlight power
>   - Remove dummy regulator node
>   - Cleanup pinctrl definitions
>
>  arch/arm64/boot/dts/qcom/sc7280-crd.dts | 122 ++++++++++++++++++++++++++++++++
>  arch/arm64/boot/dts/qcom/sc7280.dtsi    |   2 +-
>  2 files changed, 123 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/qcom/sc7280-crd.dts 
> b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> index e2efbdd..2a490a0 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7280-crd.dts
> @@ -21,6 +21,59 @@
>         chosen {
>                 stdout-path = "serial0:115200n8";
>         };
> +
> +       backlight_3v3_regulator: backlight-3v3-regulator {
> +               compatible = "regulator-fixed";
> +               regulator-name = "backlight_3v3_regulator";
> +
> +               regulator-min-microvolt = <3300000>;
> +               regulator-max-microvolt = <3300000>;
> +
> +               gpio = <&pm8350c_gpios 7 GPIO_ACTIVE_HIGH>;
> +               enable-active-high;
> +
> +               pinctrl-names = "default";
> +               pinctrl-0 = <&edp_bl_power>;
> +       };
> +
> +       edp_3v3_regulator: edp-3v3-regulator {
> +               compatible = "regulator-fixed";
> +               regulator-name = "edp_3v3_regulator";
> +
> +               regulator-min-microvolt = <3300000>;
> +               regulator-max-microvolt = <3300000>;
> +
> +               gpio = <&tlmm 80 GPIO_ACTIVE_HIGH>;
> +               enable-active-high;
> +
> +               pinctrl-names = "default";
> +               pinctrl-0 = <&edp_panel_power>;
> +       };
> +
> +       edp_backlight: edp-backlight {
> +               compatible = "pwm-backlight";
> +
> +               power-supply = <&backlight_3v3_regulator>;
> +               pwms = <&pm8350c_pwm 3 65535>;
> +       };
> +
> +       edp_panel: edp-panel {
> +               compatible = "sharp,lq140m1jw46";
> +
> +               power-supply = <&edp_3v3_regulator>;
> +               backlight = <&edp_backlight>;
> +
> +               ports {
> +                       #address-cells = <1>;
> +                       #size-cells = <0>;
> +                       port@0 {
> +                               reg = <0>;
> +                               edp_panel_in: endpoint {
> +                                       remote-endpoint = <&edp_out>;

Where is edp_out now?

> +                               };
> +                       };
> +               };
> +       };
>  };
>
>  &apps_rsc {
> @@ -76,6 +129,44 @@ ap_ts_pen_1v8: &i2c13 {
>         };
>  };
>
> +&mdss {
> +       status = "okay";
> +};
> +
> +&mdss_dp {
> +       status = "okay";
> +
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&dp_hot_plug_det>;
> +       data-lanes = <0 1>;
> +       vdda-1p2-supply = <&vreg_l6b_1p2>;
> +       vdda-0p9-supply = <&vreg_l1b_0p8>; };
> +
> +&mdss_edp {
> +       status = "okay";
> +
> +       vdda-1p2-supply = <&vreg_l6b_1p2>;
> +       vdda-0p9-supply = <&vreg_l10c_0p8>;
> +       /delete-property/ pinctrl-names;
> +       /delete-property/ pinctrl-0;
> +};
> +
> +&mdss_edp_out {
> +       remote-endpoint = <&edp_panel_in>; };
> +
> +&mdss_edp_phy {
> +       status = "okay";
> +
> +       vdda-1p2-supply = <&vreg_l6b_1p2>;
> +       vdda-0p9-supply = <&vreg_l10c_0p8>; };
> +
> +&mdss_mdp {
> +       status = "okay";
> +};
> +
>  &nvme_3v3_regulator {
>         gpio = <&tlmm 51 GPIO_ACTIVE_HIGH>;  }; @@ -84,7 +175,38 @@ 
> ap_ts_pen_1v8: &i2c13 {
>         pins = "gpio51";
>  };
>
> +&pm8350c_gpios {
> +       edp_bl_power: edp-bl-power {
> +               pins = "gpio7";
> +               function = "normal";
> +               qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
> +               bias-disable;
> +               output-low;

Is the 'output-low' necessary?

> +       };
> +
> +       edp_bl_pwm: edp-bl-pwm {
> +               pins = "gpio8";
> +               function = "func1";
> +               qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
> +               bias-disable;
> +               output-low;

Same question.

> +       };
> +};
> +
> +&pm8350c_pwm {
> +       status = "okay";
> +
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&edp_bl_pwm>;
> +};
> +
>  &tlmm {
> +       edp_panel_power: edp-panel-power {
> +               pins = "gpio80";
> +               function = "gpio";
> +               bias-pull-down;
> +       };
> +
>         tp_int_odl: tp-int-odl {
>                 pins = "gpio7";
>                 function = "gpio";
> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi 
> b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> index 3572399..eca403a 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> @@ -3066,7 +3066,7 @@
>
>                                         port@1 {
>                                                 reg = <1>;
> -                                               edp_out: endpoint { };
> +                                               mdss_edp_out: endpoint 
> + { };
>                                         };

It feels like this should be a different patch for this phandle rename.

[PATCH v3 3/4] drm/panel-edp: Add eDP sharp panel support

[Sankeerth Billakanti]

Add support for the 14" sharp,lq140m1jw46 eDP panel.

Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
---

Changes in v3:
  None

 drivers/gpu/drm/panel/panel-edp.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-edp.c b/drivers/gpu/drm/panel/panel-edp.c
index a394a15..5d13ccc 100644
--- a/drivers/gpu/drm/panel/panel-edp.c
+++ b/drivers/gpu/drm/panel/panel-edp.c
@@ -1605,6 +1605,34 @@ static const struct panel_desc sharp_lq123p1jx31 = {
 	},
 };
 
+static const struct drm_display_mode sharp_lq140m1jw46_mode = {
+	.clock = 144370,
+	.hdisplay = 1920,
+	.hsync_start = 1920 + 48,
+	.hsync_end = 1920 + 48 + 32,
+	.htotal = 1920 + 48 + 32 + 80,
+	.vdisplay = 1080,
+	.vsync_start = 1080 + 3,
+	.vsync_end = 1080 + 3 + 5,
+	.vtotal = 1080 + 3 + 5 + 69,
+	.flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
+};
+
+static const struct panel_desc sharp_lq140m1jw46 = {
+	.modes = &sharp_lq140m1jw46_mode,
+	.num_modes = 1,
+	.bpc = 8,
+	.size = {
+		.width = 309,
+		.height = 174,
+	},
+	.delay = {
+		.hpd_absent = 80,
+		.enable = 50,
+		.unprepare = 500,
+	},
+};
+
 static const struct drm_display_mode starry_kr122ea0sra_mode = {
 	.clock = 147000,
 	.hdisplay = 1920,
@@ -1719,6 +1747,9 @@ static const struct of_device_id platform_of_match[] = {
 		.compatible = "sharp,lq123p1jx31",
 		.data = &sharp_lq123p1jx31,
 	}, {
+		.compatible = "sharp,lq140m1jw46",
+		.data = &sharp_lq140m1jw46,
+	}, {
 		.compatible = "starry,kr122ea0sra",
 		.data = &starry_kr122ea0sra,
 	}, {
-- 
2.7.4

Re: [PATCH v3 3/4] drm/panel-edp: Add eDP sharp panel support

[Stephen Boyd]

Quoting Sankeerth Billakanti (2022-02-09 00:55:31)
> Add support for the 14" sharp,lq140m1jw46 eDP panel.
>
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
> ---

Can you share the edid-decode for this panel here under the cut "---"?
It would help to see the timings and make sure everything matches.

RE: [PATCH v3 3/4] drm/panel-edp: Add eDP sharp panel support

[Sankeerth Billakanti (QUIC)]

Hi Stephen,
Thank you for the review. I will share the new patch.

-----Original Message-----
From: Stephen Boyd <swboyd@chromium.org> 
Sent: Thursday, February 10, 2022 6:47 AM
To: Sankeerth Billakanti (QUIC) <quic_sbillaka@quicinc.com>; agross@kernel.org; airlied@linux.ie; bjorn.andersson@linaro.org; daniel@ffwll.ch; devicetree@vger.kernel.org; dianders@chromium.org; dri-devel@lists.freedesktop.org; freedreno@lists.freedesktop.org; krzysztof.kozlowski@canonical.com; linux-arm-msm@vger.kernel.org; linux-kernel@vger.kernel.org; robdclark@gmail.com; robh+dt@kernel.org; sam@ravnborg.org; seanpaul@chromium.org; thierry.reding@gmail.com
Cc: quic_kalyant <quic_kalyant@quicinc.com>; Abhinav Kumar (QUIC) <quic_abhinavk@quicinc.com>; Kuogee Hsieh (QUIC) <quic_khsieh@quicinc.com>; quic_mkrishn <quic_mkrishn@quicinc.com>; quic_vproddut <quic_vproddut@quicinc.com>
Subject: Re: [PATCH v3 3/4] drm/panel-edp: Add eDP sharp panel support

Quoting Sankeerth Billakanti (2022-02-09 00:55:31)
> Add support for the 14" sharp,lq140m1jw46 eDP panel.
>
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
> ---

Can you share the edid-decode for this panel here under the cut "---"?
It would help to see the timings and make sure everything matches.

Re: [PATCH v3 3/4] drm/panel-edp: Add eDP sharp panel support

[Dmitry Baryshkov]

On 09/02/2022 11:55, Sankeerth Billakanti wrote:
> Add support for the 14" sharp,lq140m1jw46 eDP panel.
> 
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>

Please excuse my ignorance, is there any reason, why we can't use 
generic panel-edp here?

> ---
> 
> Changes in v3:
>    None
> 
>   drivers/gpu/drm/panel/panel-edp.c | 31 +++++++++++++++++++++++++++++++
>   1 file changed, 31 insertions(+)
> 
> diff --git a/drivers/gpu/drm/panel/panel-edp.c b/drivers/gpu/drm/panel/panel-edp.c
> index a394a15..5d13ccc 100644
> --- a/drivers/gpu/drm/panel/panel-edp.c
> +++ b/drivers/gpu/drm/panel/panel-edp.c
> @@ -1605,6 +1605,34 @@ static const struct panel_desc sharp_lq123p1jx31 = {
>   	},
>   };
>   
> +static const struct drm_display_mode sharp_lq140m1jw46_mode = {
> +	.clock = 144370,
> +	.hdisplay = 1920,
> +	.hsync_start = 1920 + 48,
> +	.hsync_end = 1920 + 48 + 32,
> +	.htotal = 1920 + 48 + 32 + 80,
> +	.vdisplay = 1080,
> +	.vsync_start = 1080 + 3,
> +	.vsync_end = 1080 + 3 + 5,
> +	.vtotal = 1080 + 3 + 5 + 69,
> +	.flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
> +};
> +
> +static const struct panel_desc sharp_lq140m1jw46 = {
> +	.modes = &sharp_lq140m1jw46_mode,
> +	.num_modes = 1,
> +	.bpc = 8,
> +	.size = {
> +		.width = 309,
> +		.height = 174,
> +	},
> +	.delay = {
> +		.hpd_absent = 80,
> +		.enable = 50,
> +		.unprepare = 500,
> +	},
> +};
> +
>   static const struct drm_display_mode starry_kr122ea0sra_mode = {
>   	.clock = 147000,
>   	.hdisplay = 1920,
> @@ -1719,6 +1747,9 @@ static const struct of_device_id platform_of_match[] = {
>   		.compatible = "sharp,lq123p1jx31",
>   		.data = &sharp_lq123p1jx31,
>   	}, {
> +		.compatible = "sharp,lq140m1jw46",
> +		.data = &sharp_lq140m1jw46,
> +	}, {
>   		.compatible = "starry,kr122ea0sra",
>   		.data = &starry_kr122ea0sra,
>   	}, {


-- 
With best wishes
Dmitry

RE: [PATCH v3 3/4] drm/panel-edp: Add eDP sharp panel support

[Sankeerth Billakanti]

Hi Dmitry,

As discussed over a separate email, we will be exploring using the generic panel edp and aux bus after implementing the basic PSR feature. We are using a non-generic compatible string now because we enabled PSR with this. The changes from aux-bus and generic-edp may be intrusive for the dp driver and hence we want to explore it as a separate task/feature after the basic PSR feature.

Thank you,
Sankeerth

-----Original Message-----
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> 
Sent: Thursday, February 10, 2022 5:55 PM
To: Sankeerth Billakanti (QUIC) <quic_sbillaka@quicinc.com>; dri-devel@lists.freedesktop.org; linux-arm-msm@vger.kernel.org; freedreno@lists.freedesktop.org; linux-kernel@vger.kernel.org; devicetree@vger.kernel.org; agross@kernel.org; bjorn.andersson@linaro.org; robh+dt@kernel.org; robdclark@gmail.com; seanpaul@chromium.org; swboyd@chromium.org; dianders@chromium.org; krzysztof.kozlowski@canonical.com; thierry.reding@gmail.com; sam@ravnborg.org; airlied@linux.ie; daniel@ffwll.ch
Cc: quic_kalyant <quic_kalyant@quicinc.com>; Abhinav Kumar (QUIC) <quic_abhinavk@quicinc.com>; Kuogee Hsieh (QUIC) <quic_khsieh@quicinc.com>; quic_mkrishn <quic_mkrishn@quicinc.com>; quic_vproddut <quic_vproddut@quicinc.com>
Subject: Re: [PATCH v3 3/4] drm/panel-edp: Add eDP sharp panel support

WARNING: This email originated from outside of Qualcomm. Please be wary of any links or attachments, and do not enable macros.

On 09/02/2022 11:55, Sankeerth Billakanti wrote:
> Add support for the 14" sharp,lq140m1jw46 eDP panel.
>
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>

Please excuse my ignorance, is there any reason, why we can't use generic panel-edp here?

> ---
>
> Changes in v3:
>    None
>
>   drivers/gpu/drm/panel/panel-edp.c | 31 +++++++++++++++++++++++++++++++
>   1 file changed, 31 insertions(+)
>
> diff --git a/drivers/gpu/drm/panel/panel-edp.c 
> b/drivers/gpu/drm/panel/panel-edp.c
> index a394a15..5d13ccc 100644
> --- a/drivers/gpu/drm/panel/panel-edp.c
> +++ b/drivers/gpu/drm/panel/panel-edp.c
> @@ -1605,6 +1605,34 @@ static const struct panel_desc sharp_lq123p1jx31 = {
>       },
>   };
>
> +static const struct drm_display_mode sharp_lq140m1jw46_mode = {
> +     .clock = 144370,
> +     .hdisplay = 1920,
> +     .hsync_start = 1920 + 48,
> +     .hsync_end = 1920 + 48 + 32,
> +     .htotal = 1920 + 48 + 32 + 80,
> +     .vdisplay = 1080,
> +     .vsync_start = 1080 + 3,
> +     .vsync_end = 1080 + 3 + 5,
> +     .vtotal = 1080 + 3 + 5 + 69,
> +     .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC, };
> +
> +static const struct panel_desc sharp_lq140m1jw46 = {
> +     .modes = &sharp_lq140m1jw46_mode,
> +     .num_modes = 1,
> +     .bpc = 8,
> +     .size = {
> +             .width = 309,
> +             .height = 174,
> +     },
> +     .delay = {
> +             .hpd_absent = 80,
> +             .enable = 50,
> +             .unprepare = 500,
> +     },
> +};
> +
>   static const struct drm_display_mode starry_kr122ea0sra_mode = {
>       .clock = 147000,
>       .hdisplay = 1920,
> @@ -1719,6 +1747,9 @@ static const struct of_device_id platform_of_match[] = {
>               .compatible = "sharp,lq123p1jx31",
>               .data = &sharp_lq123p1jx31,
>       }, {
> +             .compatible = "sharp,lq140m1jw46",
> +             .data = &sharp_lq140m1jw46,
> +     }, {
>               .compatible = "starry,kr122ea0sra",
>               .data = &starry_kr122ea0sra,
>       }, {


--
With best wishes
Dmitry

[PATCH v3 4/4] drm/msm/dp: Add driver support to utilize drm panel

[Sankeerth Billakanti]

Add support in the DP driver to utilize the custom eDP panels
from drm/panels.

An eDP panel is always connected to the platform. So, the eDP
connector can be reported as always connected. The display mode
will be sourced from the panel. The panel mode will be set after
the link training is completed.

Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
---

Changes in v3:
  None

 drivers/gpu/drm/msm/dp/dp_display.c |  8 ++++++
 drivers/gpu/drm/msm/dp/dp_drm.c     | 54 +++++++++++++++++++++++++++++++++----
 drivers/gpu/drm/msm/dp/dp_parser.h  |  3 +++
 3 files changed, 60 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 7cc4d21..410fda4 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -1513,6 +1513,10 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)
 		return -EINVAL;
 	}
 
+	/* handle eDP on */
+	if (dp->connector_type == DRM_MODE_CONNECTOR_eDP)
+		dp_hpd_plug_handle(dp_display, 0);
+
 	mutex_lock(&dp_display->event_mutex);
 
 	/* stop sentinel checking */
@@ -1577,6 +1581,10 @@ int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
 
 	dp_display = container_of(dp, struct dp_display_private, dp_display);
 
+	/* handle edp off */
+	if (dp->connector_type == DRM_MODE_CONNECTOR_eDP)
+		dp_hpd_unplug_handle(dp_display, 0);
+
 	mutex_lock(&dp_display->event_mutex);
 
 	/* stop sentinel checking */
diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c
index d4d360d..12fa8c1 100644
--- a/drivers/gpu/drm/msm/dp/dp_drm.c
+++ b/drivers/gpu/drm/msm/dp/dp_drm.c
@@ -39,6 +39,10 @@ static enum drm_connector_status dp_connector_detect(struct drm_connector *conn,
 
 	dp = to_dp_connector(conn)->dp_display;
 
+	/* eDP is always  connected */
+	if (dp->connector_type == DRM_MODE_CONNECTOR_eDP)
+		return connector_status_connected;
+
 	DRM_DEBUG_DP("is_connected = %s\n",
 		(dp->is_connected) ? "true" : "false");
 
@@ -123,6 +127,35 @@ static enum drm_mode_status dp_connector_mode_valid(
 	return dp_display_validate_mode(dp_disp, mode->clock);
 }
 
+static int edp_connector_get_modes(struct drm_connector *connector)
+{
+	struct msm_dp *dp;
+
+	if (!connector)
+		return 0;
+
+	dp = to_dp_connector(connector)->dp_display;
+
+	return drm_bridge_get_modes(dp->panel_bridge, connector);
+}
+
+static enum drm_mode_status edp_connector_mode_valid(
+		struct drm_connector *connector,
+		struct drm_display_mode *mode)
+{
+	struct msm_dp *dp;
+
+	if (!connector)
+		return 0;
+
+	dp = to_dp_connector(connector)->dp_display;
+
+	if (mode->clock > EDP_MAX_PIXEL_CLK_KHZ)
+		return MODE_BAD;
+
+	return MODE_OK;
+}
+
 static const struct drm_connector_funcs dp_connector_funcs = {
 	.detect = dp_connector_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
@@ -137,6 +170,12 @@ static const struct drm_connector_helper_funcs dp_connector_helper_funcs = {
 	.mode_valid = dp_connector_mode_valid,
 };
 
+static const struct drm_connector_helper_funcs edp_connector_helper_funcs = {
+	.get_modes = edp_connector_get_modes,
+	.mode_valid = edp_connector_mode_valid,
+
+};
+
 /* connector initialization */
 struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display)
 {
@@ -160,12 +199,17 @@ struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display)
 	if (ret)
 		return ERR_PTR(ret);
 
-	drm_connector_helper_add(connector, &dp_connector_helper_funcs);
+	if (dp_display->connector_type == DRM_MODE_CONNECTOR_eDP) {
+		drm_connector_helper_add(connector,
+				&edp_connector_helper_funcs);
+	} else {
+		drm_connector_helper_add(connector, &dp_connector_helper_funcs);
 
-	/*
-	 * Enable HPD to let hpd event is handled when cable is connected.
-	 */
-	connector->polled = DRM_CONNECTOR_POLL_HPD;
+		/*
+		 * Enable HPD to let hpd event is handled when cable is connected.
+		 */
+		connector->polled = DRM_CONNECTOR_POLL_HPD;
+	}
 
 	drm_connector_attach_encoder(connector, dp_display->encoder);
 
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h
index 3172da0..58c4f27 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.h
+++ b/drivers/gpu/drm/msm/dp/dp_parser.h
@@ -17,6 +17,9 @@
 #define DP_MAX_PIXEL_CLK_KHZ	675000
 #define DP_MAX_NUM_DP_LANES	4
 
+/* Maximum validated clock */
+#define EDP_MAX_PIXEL_CLK_KHZ	285550
+
 enum dp_pm_type {
 	DP_CORE_PM,
 	DP_CTRL_PM,
-- 
2.7.4

Re: [PATCH v3 4/4] drm/msm/dp: Add driver support to utilize drm panel

[Stephen Boyd]

Quoting Sankeerth Billakanti (2022-02-09 00:55:32)
> Add support in the DP driver to utilize the custom eDP panels
> from drm/panels.
>
> An eDP panel is always connected to the platform. So, the eDP
> connector can be reported as always connected. The display mode
> will be sourced from the panel. The panel mode will be set after
> the link training is completed.
>
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
> ---
>
> Changes in v3:
>   None
>
>  drivers/gpu/drm/msm/dp/dp_display.c |  8 ++++++
>  drivers/gpu/drm/msm/dp/dp_drm.c     | 54 +++++++++++++++++++++++++++++++++----
>  drivers/gpu/drm/msm/dp/dp_parser.h  |  3 +++
>  3 files changed, 60 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index 7cc4d21..410fda4 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -1513,6 +1513,10 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)
>                 return -EINVAL;
>         }
>
> +       /* handle eDP on */

This comment is obvious. Please remove.

> +       if (dp->connector_type == DRM_MODE_CONNECTOR_eDP)
> +               dp_hpd_plug_handle(dp_display, 0);
> +
>         mutex_lock(&dp_display->event_mutex);
>
>         /* stop sentinel checking */
> @@ -1577,6 +1581,10 @@ int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
>
>         dp_display = container_of(dp, struct dp_display_private, dp_display);
>
> +       /* handle edp off */

This comment is obvious. Please remove.

> +       if (dp->connector_type == DRM_MODE_CONNECTOR_eDP)
> +               dp_hpd_unplug_handle(dp_display, 0);
> +
>         mutex_lock(&dp_display->event_mutex);
>
>         /* stop sentinel checking */
> diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c
> index d4d360d..12fa8c1 100644
> --- a/drivers/gpu/drm/msm/dp/dp_drm.c
> +++ b/drivers/gpu/drm/msm/dp/dp_drm.c
> @@ -39,6 +39,10 @@ static enum drm_connector_status dp_connector_detect(struct drm_connector *conn,
>
>         dp = to_dp_connector(conn)->dp_display;
>
> +       /* eDP is always  connected */
> +       if (dp->connector_type == DRM_MODE_CONNECTOR_eDP)
> +               return connector_status_connected;

Why not implement different connector ops for eDP and then not implement
this function at all in that case?

> +
>         DRM_DEBUG_DP("is_connected = %s\n",
>                 (dp->is_connected) ? "true" : "false");
>
> @@ -123,6 +127,35 @@ static enum drm_mode_status dp_connector_mode_valid(
>         return dp_display_validate_mode(dp_disp, mode->clock);
>  }
>
> +static int edp_connector_get_modes(struct drm_connector *connector)
> +{
> +       struct msm_dp *dp;
> +
> +       if (!connector)

Is this check really necessary? Why doesn't drm do it in higher layers?

> +               return 0;
> +
> +       dp = to_dp_connector(connector)->dp_display;
> +
> +       return drm_bridge_get_modes(dp->panel_bridge, connector);
> +}
> +
> +static enum drm_mode_status edp_connector_mode_valid(
> +               struct drm_connector *connector,
> +               struct drm_display_mode *mode)
> +{
> +       struct msm_dp *dp;
> +
> +       if (!connector)

Is this check really necessary? Why doesn't drm do it in higher layers?

> +               return 0;
> +
> +       dp = to_dp_connector(connector)->dp_display;
> +
> +       if (mode->clock > EDP_MAX_PIXEL_CLK_KHZ)
> +               return MODE_BAD;

Why not return MODE_CLOCK_HIGH?

> +
> +       return MODE_OK;
> +}
> +
>  static const struct drm_connector_funcs dp_connector_funcs = {
>         .detect = dp_connector_detect,
>         .fill_modes = drm_helper_probe_single_connector_modes,
> @@ -137,6 +170,12 @@ static const struct drm_connector_helper_funcs dp_connector_helper_funcs = {
>         .mode_valid = dp_connector_mode_valid,
>  };
>
> +static const struct drm_connector_helper_funcs edp_connector_helper_funcs = {
> +       .get_modes = edp_connector_get_modes,
> +       .mode_valid = edp_connector_mode_valid,
> +

Why the extra newline?

> +};
> +
>  /* connector initialization */
>  struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display)
>  {
> @@ -160,12 +199,17 @@ struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display)
>         if (ret)
>                 return ERR_PTR(ret);
>
> -       drm_connector_helper_add(connector, &dp_connector_helper_funcs);
> +       if (dp_display->connector_type == DRM_MODE_CONNECTOR_eDP) {
> +               drm_connector_helper_add(connector,
> +                               &edp_connector_helper_funcs);
> +       } else {
> +               drm_connector_helper_add(connector, &dp_connector_helper_funcs);
>
> -       /*
> -        * Enable HPD to let hpd event is handled when cable is connected.
> -        */
> -       connector->polled = DRM_CONNECTOR_POLL_HPD;
> +               /*
> +                * Enable HPD to let hpd event is handled when cable is connected.
> +                */
> +               connector->polled = DRM_CONNECTOR_POLL_HPD;
> +       }
>
>         drm_connector_attach_encoder(connector, dp_display->encoder);
>

RE: [PATCH v3 4/4] drm/msm/dp: Add driver support to utilize drm panel

[Sankeerth Billakanti (QUIC)]

Hi Stephen,
Will make the changes.

-----Original Message-----
From: Stephen Boyd <swboyd@chromium.org> 
Sent: Thursday, February 10, 2022 6:52 AM
To: Sankeerth Billakanti (QUIC) <quic_sbillaka@quicinc.com>; agross@kernel.org; airlied@linux.ie; bjorn.andersson@linaro.org; daniel@ffwll.ch; devicetree@vger.kernel.org; dianders@chromium.org; dri-devel@lists.freedesktop.org; freedreno@lists.freedesktop.org; krzysztof.kozlowski@canonical.com; linux-arm-msm@vger.kernel.org; linux-kernel@vger.kernel.org; robdclark@gmail.com; robh+dt@kernel.org; sam@ravnborg.org; seanpaul@chromium.org; thierry.reding@gmail.com
Cc: quic_kalyant <quic_kalyant@quicinc.com>; Abhinav Kumar (QUIC) <quic_abhinavk@quicinc.com>; Kuogee Hsieh (QUIC) <quic_khsieh@quicinc.com>; quic_mkrishn <quic_mkrishn@quicinc.com>; quic_vproddut <quic_vproddut@quicinc.com>; dmitry.baryshkov@linaro.org
Subject: Re: [PATCH v3 4/4] drm/msm/dp: Add driver support to utilize drm panel

Quoting Sankeerth Billakanti (2022-02-09 00:55:32)
> Add support in the DP driver to utilize the custom eDP panels from 
> drm/panels.
>
> An eDP panel is always connected to the platform. So, the eDP 
> connector can be reported as always connected. The display mode will 
> be sourced from the panel. The panel mode will be set after the link 
> training is completed.
>
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
> ---
>
> Changes in v3:
>   None
>
>  drivers/gpu/drm/msm/dp/dp_display.c |  8 ++++++
>  drivers/gpu/drm/msm/dp/dp_drm.c     | 54 +++++++++++++++++++++++++++++++++----
>  drivers/gpu/drm/msm/dp/dp_parser.h  |  3 +++
>  3 files changed, 60 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c 
> b/drivers/gpu/drm/msm/dp/dp_display.c
> index 7cc4d21..410fda4 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -1513,6 +1513,10 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder)
>                 return -EINVAL;
>         }
>
> +       /* handle eDP on */

This comment is obvious. Please remove.

> +       if (dp->connector_type == DRM_MODE_CONNECTOR_eDP)
> +               dp_hpd_plug_handle(dp_display, 0);
> +
>         mutex_lock(&dp_display->event_mutex);
>
>         /* stop sentinel checking */
> @@ -1577,6 +1581,10 @@ int msm_dp_display_disable(struct msm_dp *dp, 
> struct drm_encoder *encoder)
>
>         dp_display = container_of(dp, struct dp_display_private, 
> dp_display);
>
> +       /* handle edp off */

This comment is obvious. Please remove.

> +       if (dp->connector_type == DRM_MODE_CONNECTOR_eDP)
> +               dp_hpd_unplug_handle(dp_display, 0);
> +
>         mutex_lock(&dp_display->event_mutex);
>
>         /* stop sentinel checking */
> diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c 
> b/drivers/gpu/drm/msm/dp/dp_drm.c index d4d360d..12fa8c1 100644
> --- a/drivers/gpu/drm/msm/dp/dp_drm.c
> +++ b/drivers/gpu/drm/msm/dp/dp_drm.c
> @@ -39,6 +39,10 @@ static enum drm_connector_status 
> dp_connector_detect(struct drm_connector *conn,
>
>         dp = to_dp_connector(conn)->dp_display;
>
> +       /* eDP is always  connected */
> +       if (dp->connector_type == DRM_MODE_CONNECTOR_eDP)
> +               return connector_status_connected;

Why not implement different connector ops for eDP and then not implement this function at all in that case?

> +
>         DRM_DEBUG_DP("is_connected = %s\n",
>                 (dp->is_connected) ? "true" : "false");
>
> @@ -123,6 +127,35 @@ static enum drm_mode_status dp_connector_mode_valid(
>         return dp_display_validate_mode(dp_disp, mode->clock);  }
>
> +static int edp_connector_get_modes(struct drm_connector *connector) {
> +       struct msm_dp *dp;
> +
> +       if (!connector)

Is this check really necessary? Why doesn't drm do it in higher layers?

> +               return 0;
> +
> +       dp = to_dp_connector(connector)->dp_display;
> +
> +       return drm_bridge_get_modes(dp->panel_bridge, connector); }
> +
> +static enum drm_mode_status edp_connector_mode_valid(
> +               struct drm_connector *connector,
> +               struct drm_display_mode *mode) {
> +       struct msm_dp *dp;
> +
> +       if (!connector)

Is this check really necessary? Why doesn't drm do it in higher layers?

> +               return 0;
> +
> +       dp = to_dp_connector(connector)->dp_display;
> +
> +       if (mode->clock > EDP_MAX_PIXEL_CLK_KHZ)
> +               return MODE_BAD;

Why not return MODE_CLOCK_HIGH?

> +
> +       return MODE_OK;
> +}
> +
>  static const struct drm_connector_funcs dp_connector_funcs = {
>         .detect = dp_connector_detect,
>         .fill_modes = drm_helper_probe_single_connector_modes,
> @@ -137,6 +170,12 @@ static const struct drm_connector_helper_funcs dp_connector_helper_funcs = {
>         .mode_valid = dp_connector_mode_valid,  };
>
> +static const struct drm_connector_helper_funcs edp_connector_helper_funcs = {
> +       .get_modes = edp_connector_get_modes,
> +       .mode_valid = edp_connector_mode_valid,
> +

Why the extra newline?

> +};
> +
>  /* connector initialization */
>  struct drm_connector *dp_drm_connector_init(struct msm_dp 
> *dp_display)  { @@ -160,12 +199,17 @@ struct drm_connector 
> *dp_drm_connector_init(struct msm_dp *dp_display)
>         if (ret)
>                 return ERR_PTR(ret);
>
> -       drm_connector_helper_add(connector, &dp_connector_helper_funcs);
> +       if (dp_display->connector_type == DRM_MODE_CONNECTOR_eDP) {
> +               drm_connector_helper_add(connector,
> +                               &edp_connector_helper_funcs);
> +       } else {
> +               drm_connector_helper_add(connector, 
> + &dp_connector_helper_funcs);
>
> -       /*
> -        * Enable HPD to let hpd event is handled when cable is connected.
> -        */
> -       connector->polled = DRM_CONNECTOR_POLL_HPD;
> +               /*
> +                * Enable HPD to let hpd event is handled when cable is connected.
> +                */
> +               connector->polled = DRM_CONNECTOR_POLL_HPD;
> +       }
>
>         drm_connector_attach_encoder(connector, dp_display->encoder);
>