[PATCH v3 0/7] Fix the parse_dt of exynos dsi and remove the OF graph

[PATCH v3 0/7] Fix the parse_dt of exynos dsi and remove the OF graph

[Hoegeun Kwon]

Hi All,

The dsi + panel is a parental relationship, so OF grpah is not needed.
Therefore, the current dsi_parse_dt function will throw an error,
because there is no linked OF graph for case such as fimd + dsi +
panel.

So the 1/5 patch parse the Pll, burst and esc clock frequency
properties in dsi_parse_dt and modified to create a bridge_node only
if there is an OF graph associated with dsi.

Also fixed the dts, which depend on the 1/5 patch. So removed the
ports node and move burst and esc clock frequency properties to the
parent (DSI node).

Changes for V3:
- Split the patches considering the bisectability problem.

Changes for V2:
- Added the clear explanation for commit. (1/5 patch)
- Fixed it to the same subject as the actual work. (2/5 ~ 5/5 patches)

Best Regards,
Hoegeun

Hoegeun Kwon (7):
  arm64: dts: exynos: Add the burst and esc clock frequency properties
    for exynos5433 dts
  arm: dts: Add the burst and esc clock frequency properties for
    exynos3250 dts
  arm: dts: Add the burst and esc clock frequency properties for
    exynos4412 dts
  arm: dts: Add the burst and esc clock frequency properties for
    exynos4210 dts
  drm/exynos: dsi: Fix the parse_dt function
  arm64: dts: exynos: Remove the OF graph from DSI node
  arm: dts: Remove the OF graph from DSI node

 arch/arm/boot/dts/exynos3250-rinato.dts            | 23 ++--------------
 arch/arm/boot/dts/exynos4210-trats.dts             | 23 ++--------------
 arch/arm/boot/dts/exynos4412-trats2.dts            | 23 ++--------------
 .../boot/dts/exynos/exynos5433-tm2-common.dtsi     | 16 ++---------
 drivers/gpu/drm/exynos/exynos_drm_dsi.c            | 32 ++++++----------------
 5 files changed, 16 insertions(+), 101 deletions(-)

-- 
1.9.1

[PATCH v3 1/7] arm64: dts: exynos: Add the burst and esc clock frequency properties for exynos5433 dts

[Hoegeun Kwon]

The OF graph is not needed because the panel is a child of dsi. So
added the burst and esc clock frequency properties to the parent (DSI
node), taking into account the bisectability problem so that remove
the OF graph from DSI node.

Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
---
 arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi b/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
index 6ce93a3..e31e20c 100644
--- a/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
@@ -298,6 +298,8 @@
 	status = "okay";
 	vddcore-supply = <&ldo6_reg>;
 	vddio-supply = <&ldo7_reg>;
+	samsung,burst-clock-frequency = <512000000>;
+	samsung,esc-clock-frequency = <16000000>;
 	samsung,pll-clock-frequency = <24000000>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&te_irq>;
-- 
1.9.1

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[PATCH v3 2/7] arm: dts: Add the burst and esc clock frequency properties for exynos3250 dts

[Hoegeun Kwon]

The OF graph is not needed because the panel is a child of dsi. So
added the burst and esc clock frequency properties to the parent (DSI
node), taking into account the bisectability problem so that remove
the OF graph from DSI node.

Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
---
 arch/arm/boot/dts/exynos3250-rinato.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/exynos3250-rinato.dts b/arch/arm/boot/dts/exynos3250-rinato.dts
index 548413e..c9f191c 100644
--- a/arch/arm/boot/dts/exynos3250-rinato.dts
+++ b/arch/arm/boot/dts/exynos3250-rinato.dts
@@ -215,6 +215,8 @@
 &dsi_0 {
 	vddcore-supply = <&ldo6_reg>;
 	vddio-supply = <&ldo6_reg>;
+	samsung,burst-clock-frequency = <250000000>;
+	samsung,esc-clock-frequency = <20000000>;
 	samsung,pll-clock-frequency = <24000000>;
 	status = "okay";
 
-- 
1.9.1

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Re: [PATCH v3 2/7] arm: dts: Add the burst and esc clock frequency properties for exynos3250 dts

[Andi Shyti]

Hi Hoegeun,

On Thu, Mar 02, 2017 at 07:20:14PM +0900, Hoegeun Kwon wrote:
> The OF graph is not needed because the panel is a child of dsi. So
> added the burst and esc clock frequency properties to the parent (DSI
> node), taking into account the bisectability problem so that remove
> the OF graph from DSI node.

nitpick:

1. bisectability is not a problem (and for bisectability you
   should not mention it in the commit log, you would confuse
   bisecting people)

2. you should use the imperative form, not "added the burst... "
   but "add the burst..."

Same for the other patches.

Andi

[PATCH v3 3/7] arm: dts: Add the burst and esc clock frequency properties for exynos4412 dts

[Hoegeun Kwon]

The OF graph is not needed because the panel is a child of dsi. So
added the burst and esc clock frequency properties to the parent (DSI
node), taking into account the bisectability problem so that remove
the OF graph from DSI node.

Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
---
 arch/arm/boot/dts/exynos4412-trats2.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/exynos4412-trats2.dts b/arch/arm/boot/dts/exynos4412-trats2.dts
index 41ecd6d..82221a0 100644
--- a/arch/arm/boot/dts/exynos4412-trats2.dts
+++ b/arch/arm/boot/dts/exynos4412-trats2.dts
@@ -385,6 +385,8 @@
 &dsi_0 {
 	vddcore-supply = <&ldo8_reg>;
 	vddio-supply = <&ldo10_reg>;
+	samsung,burst-clock-frequency = <500000000>;
+	samsung,esc-clock-frequency = <20000000>;
 	samsung,pll-clock-frequency = <24000000>;
 	status = "okay";
 
-- 
1.9.1

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[PATCH v3 4/7] arm: dts: Add the burst and esc clock frequency properties for exynos4210 dts

[Hoegeun Kwon]

The OF graph is not needed because the panel is a child of dsi. So
added the burst and esc clock frequency properties to the parent (DSI
node), taking into account the bisectability problem so that remove
the OF graph from DSI node.

Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
---
 arch/arm/boot/dts/exynos4210-trats.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/exynos4210-trats.dts b/arch/arm/boot/dts/exynos4210-trats.dts
index 0ca1b4d..1743ca8 100644
--- a/arch/arm/boot/dts/exynos4210-trats.dts
+++ b/arch/arm/boot/dts/exynos4210-trats.dts
@@ -197,6 +197,8 @@
 &dsi_0 {
 	vddcore-supply = <&vusb_reg>;
 	vddio-supply = <&vmipi_reg>;
+	samsung,burst-clock-frequency = <500000000>;
+	samsung,esc-clock-frequency = <20000000>;
 	samsung,pll-clock-frequency = <24000000>;
 	status = "okay";
 
-- 
1.9.1

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[PATCH v3 5/7] drm/exynos: dsi: Fix the parse_dt function

[Hoegeun Kwon]

The dsi + panel is a parental relationship, so OF grpah is not needed.
Therefore, the current dsi_parse_dt function will throw an error,
because there is no linked OF graph for case such as fimd + dsi +
panel. So this patch parse the Pll, burst and esc clock frequency
properties in dsi_parse_dt and modified to create a bridge_node only
if there is an OF graph associated with dsi.
So I think the ABI breakage is needed.

Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
---
 drivers/gpu/drm/exynos/exynos_drm_dsi.c | 32 ++++++++------------------------
 1 file changed, 8 insertions(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index f5c04d0..2d4e118 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -1652,39 +1652,23 @@ static int exynos_dsi_parse_dt(struct exynos_dsi *dsi)
 	if (ret < 0)
 		return ret;
 
-	ep = of_graph_get_endpoint_by_regs(node, DSI_PORT_OUT, 0);
-	if (!ep) {
-		dev_err(dev, "no output port with endpoint specified\n");
-		return -EINVAL;
-	}
-
-	ret = exynos_dsi_of_read_u32(ep, "samsung,burst-clock-frequency",
+	ret = exynos_dsi_of_read_u32(node, "samsung,burst-clock-frequency",
 				     &dsi->burst_clk_rate);
 	if (ret < 0)
-		goto end;
+		return ret;
 
-	ret = exynos_dsi_of_read_u32(ep, "samsung,esc-clock-frequency",
+	ret = exynos_dsi_of_read_u32(node, "samsung,esc-clock-frequency",
 				     &dsi->esc_clk_rate);
 	if (ret < 0)
-		goto end;
-
-	of_node_put(ep);
+		return ret;
 
 	ep = of_graph_get_next_endpoint(node, NULL);
-	if (!ep) {
-		ret = -EINVAL;
-		goto end;
-	}
-
-	dsi->bridge_node = of_graph_get_remote_port_parent(ep);
-	if (!dsi->bridge_node) {
-		ret = -EINVAL;
-		goto end;
+	if (ep) {
+		dsi->bridge_node = of_graph_get_remote_port_parent(ep);
+		of_node_put(ep);
 	}
-end:
-	of_node_put(ep);
 
-	return ret;
+	return 0;
 }
 
 static int exynos_dsi_bind(struct device *dev, struct device *master,
-- 
1.9.1

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[PATCH v3 6/7] arm64: dts: exynos: Remove the OF graph from DSI node

[Hoegeun Kwon]

The OF graph is not needed because the panel is a child of dsi. So
removed the ports node in DSI node.

Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
---
 arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi b/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
index e31e20c..77ba238 100644
--- a/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
@@ -303,20 +303,6 @@
 	samsung,pll-clock-frequency = <24000000>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&te_irq>;
-
-	ports {
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		port@1 {
-			reg = <1>;
-
-			dsi_out: endpoint {
-				samsung,burst-clock-frequency = <512000000>;
-				samsung,esc-clock-frequency = <16000000>;
-			};
-		};
-	};
 };
 
 &hdmi {
-- 
1.9.1

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[PATCH v3 7/7] arm: dts: Remove the OF graph from DSI node

[Hoegeun Kwon]

The OF graph is not needed because the panel is a child of dsi. So
removed the ports node in DSI node, and port node in panel node.

Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
---
 arch/arm/boot/dts/exynos3250-rinato.dts | 21 ---------------------
 arch/arm/boot/dts/exynos4210-trats.dts  | 21 ---------------------
 arch/arm/boot/dts/exynos4412-trats2.dts | 21 ---------------------
 3 files changed, 63 deletions(-)

diff --git a/arch/arm/boot/dts/exynos3250-rinato.dts b/arch/arm/boot/dts/exynos3250-rinato.dts
index c9f191c..82e676a 100644
--- a/arch/arm/boot/dts/exynos3250-rinato.dts
+++ b/arch/arm/boot/dts/exynos3250-rinato.dts
@@ -220,21 +220,6 @@
 	samsung,pll-clock-frequency = <24000000>;
 	status = "okay";
 
-	ports {
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		port@1 {
-			reg = <1>;
-
-			dsi_out: endpoint {
-				remote-endpoint = <&dsi_in>;
-				samsung,burst-clock-frequency = <250000000>;
-				samsung,esc-clock-frequency = <20000000>;
-			};
-		};
-	};
-
 	panel@0 {
 		compatible = "samsung,s6e63j0x03";
 		reg = <0>;
@@ -264,12 +249,6 @@
 				vsync-len = <2>;
 			};
 		};
-
-		port {
-			dsi_in: endpoint {
-				remote-endpoint = <&dsi_out>;
-			};
-		};
 	};
 };
 
diff --git a/arch/arm/boot/dts/exynos4210-trats.dts b/arch/arm/boot/dts/exynos4210-trats.dts
index 1743ca8..9452bed 100644
--- a/arch/arm/boot/dts/exynos4210-trats.dts
+++ b/arch/arm/boot/dts/exynos4210-trats.dts
@@ -202,21 +202,6 @@
 	samsung,pll-clock-frequency = <24000000>;
 	status = "okay";
 
-	ports {
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		port@1 {
-			reg = <1>;
-
-			dsi_out: endpoint {
-				remote-endpoint = <&dsi_in>;
-				samsung,burst-clock-frequency = <500000000>;
-				samsung,esc-clock-frequency = <20000000>;
-			};
-		};
-	};
-
 	panel@0 {
 		reg = <0>;
 		compatible = "samsung,s6e8aa0";
@@ -244,12 +229,6 @@
 				vsync-len = <2>;
 			};
 		};
-
-		port {
-			dsi_in: endpoint {
-				remote-endpoint = <&dsi_out>;
-			};
-		};
 	};
 };
 
diff --git a/arch/arm/boot/dts/exynos4412-trats2.dts b/arch/arm/boot/dts/exynos4412-trats2.dts
index 82221a0..86ce5e5 100644
--- a/arch/arm/boot/dts/exynos4412-trats2.dts
+++ b/arch/arm/boot/dts/exynos4412-trats2.dts
@@ -390,21 +390,6 @@
 	samsung,pll-clock-frequency = <24000000>;
 	status = "okay";
 
-	ports {
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		port@1 {
-			reg = <1>;
-
-			dsi_out: endpoint {
-				remote-endpoint = <&dsi_in>;
-				samsung,burst-clock-frequency = <500000000>;
-				samsung,esc-clock-frequency = <20000000>;
-			};
-		};
-	};
-
 	panel@0 {
 		compatible = "samsung,s6e8aa0";
 		reg = <0>;
@@ -432,12 +417,6 @@
 				vsync-len = <2>;
 			};
 		};
-
-		port {
-			dsi_in: endpoint {
-				remote-endpoint = <&dsi_out>;
-			};
-		};
 	};
 };
 
-- 
1.9.1

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Re: [PATCH v3 0/7] Fix the parse_dt of exynos dsi and remove the OF graph

[Andi Shyti]

Hi Hoegeun,

> Hoegeun Kwon (7):
>   arm64: dts: exynos: Add the burst and esc clock frequency properties
>     for exynos5433 dts
>   arm: dts: Add the burst and esc clock frequency properties for
>     exynos3250 dts
>   arm: dts: Add the burst and esc clock frequency properties for
>     exynos4412 dts
>   arm: dts: Add the burst and esc clock frequency properties for
>     exynos4210 dts
>   drm/exynos: dsi: Fix the parse_dt function
>   arm64: dts: exynos: Remove the OF graph from DSI node
>   arm: dts: Remove the OF graph from DSI node

for all of them:

Reviewed-by: Andi Shyti <andi.shyti@samsung.com>

although I would have squashed patch 2, 3 and 4, but no need to
resend, unless someone else agrees.

Andi

Re: [PATCH v3 0/7] Fix the parse_dt of exynos dsi and remove the OF graph

[Krzysztof Kozlowski]

On Fri, Mar 03, 2017 at 09:22:06AM +0900, Andi Shyti wrote:
> Hi Hoegeun,
> 
> > Hoegeun Kwon (7):
> >   arm64: dts: exynos: Add the burst and esc clock frequency properties
> >     for exynos5433 dts
> >   arm: dts: Add the burst and esc clock frequency properties for
> >     exynos3250 dts
> >   arm: dts: Add the burst and esc clock frequency properties for
> >     exynos4412 dts
> >   arm: dts: Add the burst and esc clock frequency properties for
> >     exynos4210 dts
> >   drm/exynos: dsi: Fix the parse_dt function
> >   arm64: dts: exynos: Remove the OF graph from DSI node
> >   arm: dts: Remove the OF graph from DSI node
> 
> for all of them:
> 
> Reviewed-by: Andi Shyti <andi.shyti@samsung.com>

Andi,

Thanks for review. It is much welcomed.

I am trying not loose such review tags but it might happen because:
1. Patchwork does not store them,
2. Mail does not sit in inbox for long (inbox zero),
so if it is possible the most convenient for me is to reply with review
to each email.

> 
> although I would have squashed patch 2, 3 and 4, but no need to
> resend, unless someone else agrees.

Yes, these are small additions to the same arch so they could be
indeed squashed. I don't mind keeping them separated though.

Best regards,
Krzysztof