[PATCH v3 0/5] ARM: dts: exynos: Enable HDMI in Arndale Octa board

[PATCH v3 0/5] ARM: dts: exynos: Enable HDMI in Arndale Octa board

[Milo Kim]

This patch-set enables HDMI in Arndale Octa board and fixes HPD DT property.
It also includes code refactoring on ddc and phy.

v3:
  Add 'vdd-supply' property in dts.
  Use generic 'ddc' property instead of legacy property.
  Clean up DDC and PHY logic in _probe().
  Remove duplicate code of regulator consumer initialization.

v2:
  Include DRM and Exynos maintainers and resend the patch-set.
  Add Rob's ack for the patch,
	[PATCH 2/4] ARM: dts: exynos: Use 'hpd-gpios' instead of 'hpd-gpio'

Milo Kim (5):
  ARM: dts: exynos: Enable HDMI for Arndale Octa board
  ARM: dts: exynos: Use 'hpd-gpios' instead of 'hpd-gpio'
  gpu: drm: exynos_hdmi: Move DDC logic into single function
  gpu: drm: exynos_hdmi: Move PHY logic into single function
  gpu: drm: exynos_hdmi: Remove duplicate initialization of regulator
    bulk consumer

 .../bindings/display/exynos/exynos_hdmi.txt        |   4 +-
 arch/arm/boot/dts/exynos4210-universal_c210.dts    |   2 +-
 arch/arm/boot/dts/exynos4412-odroid-common.dtsi    |   2 +-
 arch/arm/boot/dts/exynos5250-arndale.dts           |   2 +-
 arch/arm/boot/dts/exynos5250-smdk5250.dts          |   2 +-
 arch/arm/boot/dts/exynos5250-snow-common.dtsi      |   2 +-
 arch/arm/boot/dts/exynos5250-spring.dts            |   2 +-
 arch/arm/boot/dts/exynos5420-arndale-octa.dts      |  13 +++
 arch/arm/boot/dts/exynos5420-peach-pit.dts         |   2 +-
 arch/arm/boot/dts/exynos5420-smdk5420.dts          |   2 +-
 arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi |   2 +-
 arch/arm/boot/dts/exynos5800-peach-pi.dts          |   2 +-
 drivers/gpu/drm/exynos/exynos_hdmi.c               | 112 +++++++++++----------
 13 files changed, 84 insertions(+), 65 deletions(-)

-- 
1.9.1

[PATCH v3 1/5] ARM: dts: exynos: Enable HDMI for Arndale Octa board

[Milo Kim]

* GPIO for HDMI hot plug detect
  GPX3_7 is used. The HPD awareness is done when the GPIO is active high and
  single ended.

* Enable HDMI block in Exynos5420
  HDMI VDD and PLL consume 1.0V LDO6 (PVDD_ANAIP_1V0) and HDMI oscillator
  requires 1.8V LDO7 (PVDD_ANAIP_1V8).

* Support HDMI display data channel
  I2C #2 is assigned for the HDMI DDC. It enables the EDID access.

Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-samsung-soc at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
Signed-off-by: Milo Kim <woogyom.kim@gmail.com>
---
 arch/arm/boot/dts/exynos5420-arndale-octa.dts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5420-arndale-octa.dts b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
index 39a3b81..2fb5708 100644
--- a/arch/arm/boot/dts/exynos5420-arndale-octa.dts
+++ b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
@@ -70,6 +70,19 @@
 	status = "disabled";
 };
 
+&hdmi {
+	hpd-gpios = <&gpx3 7 GPIO_OPEN_SOURCE>;
+	vdd_osc-supply = <&ldo7_reg>;
+	vdd_pll-supply = <&ldo6_reg>;
+	vdd-supply = <&ldo6_reg>;
+	ddc = <&i2c_2>;
+	status = "okay";
+};
+
+&i2c_2 {
+	status = "okay";
+};
+
 &hsi2c_4 {
 	status = "okay";
 
-- 
1.9.1

[PATCH v3 1/5] ARM: dts: exynos: Enable HDMI for Arndale Octa board

[Krzysztof Kozlowski]

On Wed, Aug 24, 2016 at 10:07:15PM +0900, Milo Kim wrote:
> * GPIO for HDMI hot plug detect
>   GPX3_7 is used. The HPD awareness is done when the GPIO is active high and
>   single ended.
> 
> * Enable HDMI block in Exynos5420
>   HDMI VDD and PLL consume 1.0V LDO6 (PVDD_ANAIP_1V0) and HDMI oscillator
>   requires 1.8V LDO7 (PVDD_ANAIP_1V8).
> 
> * Support HDMI display data channel
>   I2C #2 is assigned for the HDMI DDC. It enables the EDID access.
> 
> Cc: Kukjin Kim <kgene@kernel.org>
> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: linux-samsung-soc at vger.kernel.org
> Cc: linux-kernel at vger.kernel.org
> Signed-off-by: Milo Kim <woogyom.kim@gmail.com>
> ---
>  arch/arm/boot/dts/exynos5420-arndale-octa.dts | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/exynos5420-arndale-octa.dts b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
> index 39a3b81..2fb5708 100644
> --- a/arch/arm/boot/dts/exynos5420-arndale-octa.dts
> +++ b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
> @@ -70,6 +70,19 @@
>  	status = "disabled";
>  };
>

First of all - it looks like these DTS patches do not depend on DRM
part, do they?

> +&hdmi {
> +	hpd-gpios = <&gpx3 7 GPIO_OPEN_SOURCE>;

Are you sure it is open-source type?

> +	vdd_osc-supply = <&ldo7_reg>;
> +	vdd_pll-supply = <&ldo6_reg>;
> +	vdd-supply = <&ldo6_reg>;
> +	ddc = <&i2c_2>;
> +	status = "okay";
> +};
> +
> +&i2c_2 {
> +	status = "okay";

Hm, what is connected here? Please put it in alphabetical order (so
after hsi2c_4).

Best regards,
Krzysztof

[PATCH v3 1/5] ARM: dts: exynos: Enable HDMI for Arndale Octa board

[Milo Kim]

Hi Krzysztof,

On 08/25/2016 04:05 AM, Krzysztof Kozlowski wrote:
> First of all - it looks like these DTS patches do not depend on DRM
> part, do they?

I just sent the v4 patch for DTS. DRM patch-set was sent separately. 
Thanks for your advise.

Best regards,
Milo

[PATCH v3 2/5] ARM: dts: exynos: Use 'hpd-gpios' instead of 'hpd-gpio'

[Milo Kim]

This patch enables getting a HPD GPIO descriptor quickly.
The exynos-hdmi driver uses "hpd" for HDMI hot plug detection.

	static int hdmi_resources_init(struct hdmi_context *hdata)
	{
		...
		hdata->hpd_gpio = devm_gpiod_get(dev, "hpd", GPIOD_IN);
		...
	}

This calls 'of_find_gpio()' and it generates the GPIO consumer ID by referring
GPIO suffix. So 'hpd-gpios' is preferred on getting a GPIO descriptor.

However, if the device tree uses 'hpd-gpio', then the exynos-hdmi driver
always retries to get a GPIO descriptor because the first GPIO suffix is not
'gpio' but 'gpios'. So you always see the debug message below.

	of_get_named_gpiod_flags: can't parse 'hpd-gpios' property of node '/soc/hdmi at 14530000[0]'

Use the preferred property, 'hpd-gpios' instead of 'hpd-gpio'.

Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: devicetree at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-samsung-soc at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
Signed-off-by: Milo Kim <woogyom.kim@gmail.com>
---
 Documentation/devicetree/bindings/display/exynos/exynos_hdmi.txt | 4 ++--
 arch/arm/boot/dts/exynos4210-universal_c210.dts                  | 2 +-
 arch/arm/boot/dts/exynos4412-odroid-common.dtsi                  | 2 +-
 arch/arm/boot/dts/exynos5250-arndale.dts                         | 2 +-
 arch/arm/boot/dts/exynos5250-smdk5250.dts                        | 2 +-
 arch/arm/boot/dts/exynos5250-snow-common.dtsi                    | 2 +-
 arch/arm/boot/dts/exynos5250-spring.dts                          | 2 +-
 arch/arm/boot/dts/exynos5420-peach-pit.dts                       | 2 +-
 arch/arm/boot/dts/exynos5420-smdk5420.dts                        | 2 +-
 arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi               | 2 +-
 arch/arm/boot/dts/exynos5800-peach-pi.dts                        | 2 +-
 11 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/exynos/exynos_hdmi.txt b/Documentation/devicetree/bindings/display/exynos/exynos_hdmi.txt
index a2ec4c1..6394ea9 100644
--- a/Documentation/devicetree/bindings/display/exynos/exynos_hdmi.txt
+++ b/Documentation/devicetree/bindings/display/exynos/exynos_hdmi.txt
@@ -9,7 +9,7 @@ Required properties:
 - reg: physical base address of the hdmi and length of memory mapped
 	region.
 - interrupts: interrupt number to the cpu.
-- hpd-gpio: following information about the hotplug gpio pin.
+- hpd-gpios: following information about the hotplug gpio pin.
 	a) phandle of the gpio controller node.
 	b) pin number within the gpio controller.
 	c) optional flags and pull up/down.
@@ -56,7 +56,7 @@ Example:
 		compatible = "samsung,exynos4212-hdmi";
 		reg = <0x14530000 0x100000>;
 		interrupts = <0 95 0>;
-		hpd-gpio = <&gpx3 7 1>;
+		hpd-gpios = <&gpx3 7 1>;
 		ddc = <&hdmi_ddc_node>;
 		phy = <&hdmi_phy_node>;
 		samsung,syscon-phandle = <&pmu_system_controller>;
diff --git a/arch/arm/boot/dts/exynos4210-universal_c210.dts b/arch/arm/boot/dts/exynos4210-universal_c210.dts
index 9a75e3e..cf95202 100644
--- a/arch/arm/boot/dts/exynos4210-universal_c210.dts
+++ b/arch/arm/boot/dts/exynos4210-universal_c210.dts
@@ -269,7 +269,7 @@
 };
 
 &hdmi {
-	hpd-gpio = <&gpx3 7 GPIO_ACTIVE_HIGH>;
+	hpd-gpios = <&gpx3 7 GPIO_ACTIVE_HIGH>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&hdmi_hpd>;
 	hdmi-en-supply = <&hdmi_en>;
diff --git a/arch/arm/boot/dts/exynos4412-odroid-common.dtsi b/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
index 58ad48e7..be644fe 100644
--- a/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
+++ b/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
@@ -227,7 +227,7 @@
 };
 
 &hdmi {
-	hpd-gpio = <&gpx3 7 GPIO_ACTIVE_HIGH>;
+	hpd-gpios = <&gpx3 7 GPIO_ACTIVE_HIGH>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&hdmi_hpd>;
 	vdd-supply = <&ldo8_reg>;
diff --git a/arch/arm/boot/dts/exynos5250-arndale.dts b/arch/arm/boot/dts/exynos5250-arndale.dts
index ea70603..3d981f3 100644
--- a/arch/arm/boot/dts/exynos5250-arndale.dts
+++ b/arch/arm/boot/dts/exynos5250-arndale.dts
@@ -152,7 +152,7 @@
 };
 
 &hdmi {
-	hpd-gpio = <&gpx3 7 GPIO_ACTIVE_LOW>;
+	hpd-gpios = <&gpx3 7 GPIO_ACTIVE_LOW>;
 	vdd_osc-supply = <&ldo10_reg>;
 	vdd_pll-supply = <&ldo8_reg>;
 	vdd-supply = <&ldo8_reg>;
diff --git a/arch/arm/boot/dts/exynos5250-smdk5250.dts b/arch/arm/boot/dts/exynos5250-smdk5250.dts
index 381af13..7f27263 100644
--- a/arch/arm/boot/dts/exynos5250-smdk5250.dts
+++ b/arch/arm/boot/dts/exynos5250-smdk5250.dts
@@ -116,7 +116,7 @@
 };
 
 &hdmi {
-	hpd-gpio = <&gpx3 7 GPIO_ACTIVE_HIGH>;
+	hpd-gpios = <&gpx3 7 GPIO_ACTIVE_HIGH>;
 };
 
 &i2c_0 {
diff --git a/arch/arm/boot/dts/exynos5250-snow-common.dtsi b/arch/arm/boot/dts/exynos5250-snow-common.dtsi
index fadbea7..1055d25 100644
--- a/arch/arm/boot/dts/exynos5250-snow-common.dtsi
+++ b/arch/arm/boot/dts/exynos5250-snow-common.dtsi
@@ -260,7 +260,7 @@
 };
 
 &hdmi {
-	hpd-gpio = <&gpx3 7 GPIO_ACTIVE_HIGH>;
+	hpd-gpios = <&gpx3 7 GPIO_ACTIVE_HIGH>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&hdmi_hpd_irq>;
 	phy = <&hdmiphy>;
diff --git a/arch/arm/boot/dts/exynos5250-spring.dts b/arch/arm/boot/dts/exynos5250-spring.dts
index 44f4292..1d52a79 100644
--- a/arch/arm/boot/dts/exynos5250-spring.dts
+++ b/arch/arm/boot/dts/exynos5250-spring.dts
@@ -91,7 +91,7 @@
 };
 
 &hdmi {
-	hpd-gpio = <&gpx3 7 GPIO_ACTIVE_HIGH>;
+	hpd-gpios = <&gpx3 7 GPIO_ACTIVE_HIGH>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&hdmi_hpd_irq>;
 	phy = <&hdmiphy>;
diff --git a/arch/arm/boot/dts/exynos5420-peach-pit.dts b/arch/arm/boot/dts/exynos5420-peach-pit.dts
index fe4e091..f6f256f 100644
--- a/arch/arm/boot/dts/exynos5420-peach-pit.dts
+++ b/arch/arm/boot/dts/exynos5420-peach-pit.dts
@@ -179,7 +179,7 @@
 
 &hdmi {
 	status = "okay";
-	hpd-gpio = <&gpx3 7 GPIO_ACTIVE_HIGH>;
+	hpd-gpios = <&gpx3 7 GPIO_ACTIVE_HIGH>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&hdmi_hpd_irq>;
 	ddc = <&i2c_2>;
diff --git a/arch/arm/boot/dts/exynos5420-smdk5420.dts b/arch/arm/boot/dts/exynos5420-smdk5420.dts
index ed8f342..2954646 100644
--- a/arch/arm/boot/dts/exynos5420-smdk5420.dts
+++ b/arch/arm/boot/dts/exynos5420-smdk5420.dts
@@ -130,7 +130,7 @@
 
 &hdmi {
 	status = "okay";
-	hpd-gpio = <&gpx3 7 GPIO_ACTIVE_HIGH>;
+	hpd-gpios = <&gpx3 7 GPIO_ACTIVE_HIGH>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&hdmi_hpd_irq>;
 };
diff --git a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
index d562530..47c113c 100644
--- a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
+++ b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
@@ -250,7 +250,7 @@
 
 &hdmi {
 	status = "okay";
-	hpd-gpio = <&gpx3 7 GPIO_ACTIVE_HIGH>;
+	hpd-gpios = <&gpx3 7 GPIO_ACTIVE_HIGH>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&hdmi_hpd_irq>;
 
diff --git a/arch/arm/boot/dts/exynos5800-peach-pi.dts b/arch/arm/boot/dts/exynos5800-peach-pi.dts
index 5ec71e2..51a8bca 100644
--- a/arch/arm/boot/dts/exynos5800-peach-pi.dts
+++ b/arch/arm/boot/dts/exynos5800-peach-pi.dts
@@ -179,7 +179,7 @@
 
 &hdmi {
 	status = "okay";
-	hpd-gpio = <&gpx3 7 GPIO_ACTIVE_HIGH>;
+	hpd-gpios = <&gpx3 7 GPIO_ACTIVE_HIGH>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&hdmi_hpd_irq>;
 	ddc = <&i2c_2>;
-- 
1.9.1

[PATCH v3 2/5] ARM: dts: exynos: Use 'hpd-gpios' instead of 'hpd-gpio'

[Krzysztof Kozlowski]

On Wed, Aug 24, 2016 at 10:07:16PM +0900, Milo Kim wrote:
> This patch enables getting a HPD GPIO descriptor quickly.
> The exynos-hdmi driver uses "hpd" for HDMI hot plug detection.
> 
> 	static int hdmi_resources_init(struct hdmi_context *hdata)
> 	{
> 		...
> 		hdata->hpd_gpio = devm_gpiod_get(dev, "hpd", GPIOD_IN);
> 		...
> 	}
> 
> This calls 'of_find_gpio()' and it generates the GPIO consumer ID by referring
> GPIO suffix. So 'hpd-gpios' is preferred on getting a GPIO descriptor.
> 
> However, if the device tree uses 'hpd-gpio', then the exynos-hdmi driver
> always retries to get a GPIO descriptor because the first GPIO suffix is not
> 'gpio' but 'gpios'. So you always see the debug message below.
> 
> 	of_get_named_gpiod_flags: can't parse 'hpd-gpios' property of node '/soc/hdmi at 14530000[0]'
>

Thanks for fixing this, applied!

BR,
Krzysztof

[PATCH v3 3/5] gpu: drm: exynos_hdmi: Move DDC logic into single function

[Milo Kim]

Paring DT properties and getting the I2C adapter in one function.

Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-samsung-soc at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
Cc: dri-devel at lists.freedesktop.org
Signed-off-by: Milo Kim <woogyom.kim@gmail.com>
---
 drivers/gpu/drm/exynos/exynos_hdmi.c | 46 ++++++++++++++++++++----------------
 1 file changed, 25 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 2275efe..8d99b5d 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -1760,16 +1760,34 @@ static const struct component_ops hdmi_component_ops = {
 	.unbind = hdmi_unbind,
 };
 
-static struct device_node *hdmi_legacy_ddc_dt_binding(struct device *dev)
+static int hdmi_get_ddc_adapter(struct hdmi_context *hdata)
 {
 	const char *compatible_str = "samsung,exynos4210-hdmiddc";
 	struct device_node *np;
+	struct i2c_adapter *adpt;
 
 	np = of_find_compatible_node(NULL, NULL, compatible_str);
 	if (np)
-		return of_get_next_parent(np);
+		np = of_get_next_parent(np);
+	else
+		np = of_parse_phandle(hdata->dev->of_node, "ddc", 0);
+
+	if (!np) {
+		DRM_ERROR("Failed to find ddc node in device tree\n");
+		return -ENODEV;
+	}
 
-	return NULL;
+	adpt = of_find_i2c_adapter_by_node(np);
+	if (!adpt) {
+		DRM_ERROR("Failed to get ddc i2c adapter by node\n");
+		of_node_put(np);
+		return -EPROBE_DEFER;
+	}
+
+	hdata->ddc_adpt = adpt;
+	of_node_put(np);
+
+	return 0;
 }
 
 static struct device_node *hdmi_legacy_phy_dt_binding(struct device *dev)
@@ -1781,7 +1799,7 @@ static struct device_node *hdmi_legacy_phy_dt_binding(struct device *dev)
 
 static int hdmi_probe(struct platform_device *pdev)
 {
-	struct device_node *ddc_node, *phy_node;
+	struct device_node *phy_node;
 	struct device *dev = &pdev->dev;
 	struct hdmi_context *hdata;
 	struct resource *res;
@@ -1811,23 +1829,9 @@ static int hdmi_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	ddc_node = hdmi_legacy_ddc_dt_binding(dev);
-	if (ddc_node)
-		goto out_get_ddc_adpt;
-
-	ddc_node = of_parse_phandle(dev->of_node, "ddc", 0);
-	if (!ddc_node) {
-		DRM_ERROR("Failed to find ddc node in device tree\n");
-		return -ENODEV;
-	}
-	of_node_put(dev->of_node);
-
-out_get_ddc_adpt:
-	hdata->ddc_adpt = of_find_i2c_adapter_by_node(ddc_node);
-	if (!hdata->ddc_adpt) {
-		DRM_ERROR("Failed to get ddc i2c adapter by node\n");
-		return -EPROBE_DEFER;
-	}
+	ret = hdmi_get_ddc_adapter(hdata);
+	if (ret)
+		return ret;
 
 	phy_node = hdmi_legacy_phy_dt_binding(dev);
 	if (phy_node)
-- 
1.9.1

[PATCH v3 3/5] gpu: drm: exynos_hdmi: Move DDC logic into single function

[Andrzej Hajda]

On 08/24/2016 03:07 PM, Milo Kim wrote:
> Paring DT properties and getting the I2C adapter in one function.
>
> Cc: Kukjin Kim <kgene@kernel.org>
> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Inki Dae <inki.dae@samsung.com>
> Cc: Joonyoung Shim <jy0922.shim@samsung.com>
> Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
> Cc: Kyungmin Park <kyungmin.park@samsung.com>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: devicetree at vger.kernel.org
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: linux-samsung-soc at vger.kernel.org
> Cc: linux-kernel at vger.kernel.org
> Cc: dri-devel at lists.freedesktop.org
> Signed-off-by: Milo Kim <woogyom.kim@gmail.com>
> ---
>  drivers/gpu/drm/exynos/exynos_hdmi.c | 46 ++++++++++++++++++++----------------
>  1 file changed, 25 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
> index 2275efe..8d99b5d 100644
> --- a/drivers/gpu/drm/exynos/exynos_hdmi.c
> +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
> @@ -1760,16 +1760,34 @@ static const struct component_ops hdmi_component_ops = {
>  	.unbind = hdmi_unbind,
>  };
>  
> -static struct device_node *hdmi_legacy_ddc_dt_binding(struct device *dev)
> +static int hdmi_get_ddc_adapter(struct hdmi_context *hdata)
>  {
>  	const char *compatible_str = "samsung,exynos4210-hdmiddc";
>  	struct device_node *np;
> +	struct i2c_adapter *adpt;
>  
>  	np = of_find_compatible_node(NULL, NULL, compatible_str);
>  	if (np)
> -		return of_get_next_parent(np);
> +		np = of_get_next_parent(np);
> +	else
> +		np = of_parse_phandle(hdata->dev->of_node, "ddc", 0);
> +
> +	if (!np) {
> +		DRM_ERROR("Failed to find ddc node in device tree\n");
> +		return -ENODEV;
> +	}
>  
> -	return NULL;
> +	adpt = of_find_i2c_adapter_by_node(np);
You can put of_node_put here, instead of duplicating it on both
execution paths.
> +	if (!adpt) {
> +		DRM_ERROR("Failed to get ddc i2c adapter by node\n");
In case of probe deferring DRM_INFO should be enough, or even DRM_DEBUG.
> +		of_node_put(np);
> +		return -EPROBE_DEFER;
> +	}
> +
> +	hdata->ddc_adpt = adpt;
> +	of_node_put(np);
> +
> +	return 0;
>  }
>  
>  static struct device_node *hdmi_legacy_phy_dt_binding(struct device *dev)
> @@ -1781,7 +1799,7 @@ static struct device_node *hdmi_legacy_phy_dt_binding(struct device *dev)
>  
>  static int hdmi_probe(struct platform_device *pdev)
>  {
> -	struct device_node *ddc_node, *phy_node;
> +	struct device_node *phy_node;
>  	struct device *dev = &pdev->dev;
>  	struct hdmi_context *hdata;
>  	struct resource *res;
> @@ -1811,23 +1829,9 @@ static int hdmi_probe(struct platform_device *pdev)
>  		return ret;
>  	}
>  
> -	ddc_node = hdmi_legacy_ddc_dt_binding(dev);
> -	if (ddc_node)
> -		goto out_get_ddc_adpt;
> -
> -	ddc_node = of_parse_phandle(dev->of_node, "ddc", 0);
> -	if (!ddc_node) {
> -		DRM_ERROR("Failed to find ddc node in device tree\n");
> -		return -ENODEV;
> -	}
> -	of_node_put(dev->of_node);
> -
> -out_get_ddc_adpt:
> -	hdata->ddc_adpt = of_find_i2c_adapter_by_node(ddc_node);
> -	if (!hdata->ddc_adpt) {
> -		DRM_ERROR("Failed to get ddc i2c adapter by node\n");
> -		return -EPROBE_DEFER;
> -	}
> +	ret = hdmi_get_ddc_adapter(hdata);
> +	if (ret)
> +		return ret;
>  
>  	phy_node = hdmi_legacy_phy_dt_binding(dev);
>  	if (phy_node)

[PATCH v3 4/5] gpu: drm: exynos_hdmi: Move PHY logic into single function

[Milo Kim]

Paring DT properties and getting PHY IO (memory mapped or I2C) in one function.

Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-samsung-soc at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
Cc: dri-devel at lists.freedesktop.org
Signed-off-by: Milo Kim <woogyom.kim@gmail.com>
---
 drivers/gpu/drm/exynos/exynos_hdmi.c | 63 +++++++++++++++++++-----------------
 1 file changed, 33 insertions(+), 30 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 8d99b5d..249cb23 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -1790,16 +1790,44 @@ static int hdmi_get_ddc_adapter(struct hdmi_context *hdata)
 	return 0;
 }
 
-static struct device_node *hdmi_legacy_phy_dt_binding(struct device *dev)
+static int hdmi_get_phy_io(struct hdmi_context *hdata)
 {
 	const char *compatible_str = "samsung,exynos4212-hdmiphy";
+	struct device_node *np;
+	int ret = 0;
+
+	np = of_find_compatible_node(NULL, NULL, compatible_str);
+	if (!np) {
+		np = of_parse_phandle(hdata->dev->of_node, "phy", 0);
+		if (!np) {
+			DRM_ERROR("Failed to find hdmiphy node in device tree\n");
+			return -ENODEV;
+		}
+	}
+
+	if (hdata->drv_data->is_apb_phy) {
+		hdata->regs_hdmiphy = of_iomap(np, 0);
+		if (!hdata->regs_hdmiphy) {
+			DRM_ERROR("failed to ioremap hdmi phy\n");
+			ret = -ENOMEM;
+			goto out;
+		}
+	} else {
+		hdata->hdmiphy_port = of_find_i2c_device_by_node(np);
+		if (!hdata->hdmiphy_port) {
+			DRM_ERROR("Failed to get hdmi phy i2c client\n");
+			ret = -EPROBE_DEFER;
+			goto out;
+		}
+	}
 
-	return of_find_compatible_node(NULL, NULL, compatible_str);
+out:
+	of_node_put(np);
+	return ret;
 }
 
 static int hdmi_probe(struct platform_device *pdev)
 {
-	struct device_node *phy_node;
 	struct device *dev = &pdev->dev;
 	struct hdmi_context *hdata;
 	struct resource *res;
@@ -1833,34 +1861,9 @@ static int hdmi_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	phy_node = hdmi_legacy_phy_dt_binding(dev);
-	if (phy_node)
-		goto out_get_phy_port;
-
-	phy_node = of_parse_phandle(dev->of_node, "phy", 0);
-	if (!phy_node) {
-		DRM_ERROR("Failed to find hdmiphy node in device tree\n");
-		ret = -ENODEV;
+	ret = hdmi_get_phy_io(hdata);
+	if (ret)
 		goto err_ddc;
-	}
-	of_node_put(dev->of_node);
-
-out_get_phy_port:
-	if (hdata->drv_data->is_apb_phy) {
-		hdata->regs_hdmiphy = of_iomap(phy_node, 0);
-		if (!hdata->regs_hdmiphy) {
-			DRM_ERROR("failed to ioremap hdmi phy\n");
-			ret = -ENOMEM;
-			goto err_ddc;
-		}
-	} else {
-		hdata->hdmiphy_port = of_find_i2c_device_by_node(phy_node);
-		if (!hdata->hdmiphy_port) {
-			DRM_ERROR("Failed to get hdmi phy i2c client\n");
-			ret = -EPROBE_DEFER;
-			goto err_ddc;
-		}
-	}
 
 	INIT_DELAYED_WORK(&hdata->hotplug_work, hdmi_hotplug_work_func);
 
-- 
1.9.1

[PATCH v3 5/5] gpu: drm: exynos_hdmi: Remove duplicate initialization of regulator bulk consumer

[Milo Kim]

The helper, devm_regulator_bulk_get() initializes the consumer as NULL,
so this code can be ignored.

Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-samsung-soc at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
Cc: dri-devel at lists.freedesktop.org
Signed-off-by: Milo Kim <woogyom.kim@gmail.com>
---
 drivers/gpu/drm/exynos/exynos_hdmi.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 249cb23..4e17877f 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -1669,10 +1669,9 @@ static int hdmi_resources_init(struct hdmi_context *hdata)
 	if (ret)
 		return ret;
 
-	for (i = 0; i < ARRAY_SIZE(supply); ++i) {
+	for (i = 0; i < ARRAY_SIZE(supply); ++i)
 		hdata->regul_bulk[i].supply = supply[i];
-		hdata->regul_bulk[i].consumer = NULL;
-	}
+
 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(supply), hdata->regul_bulk);
 	if (ret) {
 		if (ret != -EPROBE_DEFER)
-- 
1.9.1

[PATCH v3 5/5] gpu: drm: exynos_hdmi: Remove duplicate initialization of regulator bulk consumer

[Andrzej Hajda]

On 08/24/2016 03:07 PM, Milo Kim wrote:
> The helper, devm_regulator_bulk_get() initializes the consumer as NULL,
> so this code can be ignored.
>
> Cc: Kukjin Kim <kgene@kernel.org>
> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Inki Dae <inki.dae@samsung.com>
> Cc: Joonyoung Shim <jy0922.shim@samsung.com>
> Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
> Cc: Kyungmin Park <kyungmin.park@samsung.com>
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: linux-samsung-soc at vger.kernel.org
> Cc: linux-kernel at vger.kernel.org
> Cc: dri-devel at lists.freedesktop.org
> Signed-off-by: Milo Kim <woogyom.kim@gmail.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
--
Regards
Andrzej
> ---
>  drivers/gpu/drm/exynos/exynos_hdmi.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
> index 249cb23..4e17877f 100644
> --- a/drivers/gpu/drm/exynos/exynos_hdmi.c
> +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
> @@ -1669,10 +1669,9 @@ static int hdmi_resources_init(struct hdmi_context *hdata)
>  	if (ret)
>  		return ret;
>  
> -	for (i = 0; i < ARRAY_SIZE(supply); ++i) {
> +	for (i = 0; i < ARRAY_SIZE(supply); ++i)
>  		hdata->regul_bulk[i].supply = supply[i];
> -		hdata->regul_bulk[i].consumer = NULL;
> -	}
> +
>  	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(supply), hdata->regul_bulk);
>  	if (ret) {
>  		if (ret != -EPROBE_DEFER)