[PATCH v6 0/6] Add support for Orange Pi 3

[PATCH v6 0/6] Add support for Orange Pi 3

[megous]

From: Ondrej Jirman <megous@megous.com>

This series implements support for Xunlong Orange Pi 3 board.

Unfortunately, this board needs some small driver patches, so I have
split the boards DT patch into chunks that require patches for drivers
in various subsystems.

Suggested merging plan/dependencies:

- stmmac patches are needed for ethernet support (patches 1-3)
  - these should be ready now
- HDMI support (patches 4-6)
  - should be ready

Changes in v2:
- added dt-bindings documentation for the board's compatible string
  (suggested by Clement)
- addressed checkpatch warnings and code formatting issues (on Maxime's
  suggestions)
- stmmac: dropped useless parenthesis, reworded description of the patch
  (suggested by Sergei)
- drop useles dev_info() about the selected io bias voltage
- docummented io voltage bias selection variant macros
- wifi: marked WiFi DTS patch and realted mmc1_pins as "DO NOT MERGE",
  because wifi depends on H6 RTC support that's not merged yet (suggested
  by Clement)
- added missing signed-of-bys
- changed &usb2otg dr_mode to otg, and added a note about VBUS
- improved wording of HDMI driver's DDC power supply patch

Changes in v3:
- dropped already applied patches
- changed pinctrl I/O bias selection constants to enum and renamed
- added /omit-if-no-ref/ to mmc1_pins
- made mmc1_pins default pinconf for mmc1 in H6 dtsi
- move ddc-supply to HDMI connector node, updated patch descriptions,
  changed dt-bindings docs

Changes in v4:
- fix checkpatch warnings/style issues
- use enum in struct sunxi_desc_function for io_bias_cfg_variant
- collected acked-by's
- fix compile error in drivers/pinctrl/sunxi/pinctrl-sun9i-a80-r.c:156
  caused by missing conversion from has_io_bias_cfg struct member
  (I've kept the acked-by, because it's a trivial change, but feel free
  to object.) (reported by Martin A. on github)
  I did not have A80 pinctrl enabled for some reason, so I did not catch
  this sooner.
- dropped brcm firmware patch (was already applied)
- dropped the wifi dts patch (will re-send after H6 RTC gets merged,
  along with bluetooth support, in a separate series)

Changes in v5:
- dropped already applied patches (pinctrl patches, mmc1 pinconf patch)
- rename GMAC-3V3 -> GMAC-3V to match the schematic (Jagan)
- changed hdmi-connector's ddc-supply property to ddc-en-gpios
  (Rob Herring)

Changes in v6:
- added dt-bindings reviewed-by tag
- fix wording in stmmac commit (as suggested by Sergei)

Please take a look.

thank you and regards,
  Ondrej Jirman

Icenowy Zheng (2):
  net: stmmac: sun8i: add support for Allwinner H6 EMAC
  net: stmmac: sun8i: force select external PHY when no internal one

Ondrej Jirman (4):
  arm64: dts: allwinner: orange-pi-3: Enable ethernet
  dt-bindings: display: hdmi-connector: Support DDC bus enable
  drm: sun4i: Add support for enabling DDC I2C bus to sun8i_dw_hdmi glue
  arm64: dts: allwinner: orange-pi-3: Enable HDMI output

 .../display/connector/hdmi-connector.txt      |  1 +
 .../dts/allwinner/sun50i-h6-orangepi-3.dts    | 70 +++++++++++++++++++
 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c         | 55 ++++++++++++++-
 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h         |  3 +
 .../net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 21 ++++++
 5 files changed, 147 insertions(+), 3 deletions(-)

-- 
2.21.0

[PATCH v6 1/6] net: stmmac: sun8i: add support for Allwinner H6 EMAC

[megous]

From: Icenowy Zheng <icenowy@aosc.io>

The EMAC on Allwinner H6 is just like the one on A64. The "internal PHY" on
H6 is on a co-packaged AC200 chip, and it's not really internal (it's
connected via RMII at PA GPIO bank).

Add support for the Allwinner H6 EMAC in the dwmac-sun8i driver.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Ondrej Jirman <megous@megous.com>
---
 .../net/ethernet/stmicro/stmmac/dwmac-sun8i.c    | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
index ba124a4da793..3258dec84d55 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
@@ -147,6 +147,20 @@ static const struct emac_variant emac_variant_a64 = {
 	.tx_delay_max = 7,
 };
 
+static const struct emac_variant emac_variant_h6 = {
+	.default_syscon_value = 0x50000,
+	.syscon_field = &sun8i_syscon_reg_field,
+	/* The "Internal PHY" of H6 is not on the die. It's on the
+	 * co-packaged AC200 chip instead.
+	 */
+	.soc_has_internal_phy = false,
+	.support_mii = true,
+	.support_rmii = true,
+	.support_rgmii = true,
+	.rx_delay_max = 31,
+	.tx_delay_max = 7,
+};
+
 #define EMAC_BASIC_CTL0 0x00
 #define EMAC_BASIC_CTL1 0x04
 #define EMAC_INT_STA    0x08
@@ -1212,6 +1226,8 @@ static const struct of_device_id sun8i_dwmac_match[] = {
 		.data = &emac_variant_r40 },
 	{ .compatible = "allwinner,sun50i-a64-emac",
 		.data = &emac_variant_a64 },
+	{ .compatible = "allwinner,sun50i-h6-emac",
+		.data = &emac_variant_h6 },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, sun8i_dwmac_match);
-- 
2.21.0

[PATCH v6 2/6] net: stmmac: sun8i: force select external PHY when no internal one

[megous]

From: Icenowy Zheng <icenowy@aosc.io>

The PHY selection bit also exists on SoCs without an internal PHY; if it's
set to 1 (internal PHY, default value) then the MAC will not make use of
any PHY such SoCs.

This problem appears when adapting for H6, which has no real internal PHY
(the "internal PHY" on H6 is not on-die, but on a co-packaged AC200 chip,
connected via RMII interface at GPIO bank A).

Force the PHY selection bit to 0 when the SOC doesn't have an internal PHY,
to address the problem of a wrong default value.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Ondrej Jirman <megous@megous.com>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
index 3258dec84d55..0484c289f328 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
@@ -907,6 +907,11 @@ static int sun8i_dwmac_set_syscon(struct stmmac_priv *priv)
 		 * address. No need to mask it again.
 		 */
 		reg |= 1 << H3_EPHY_ADDR_SHIFT;
+	} else {
+		/* For SoCs without internal PHY the PHY selection bit should be
+		 * set to 0 (external PHY).
+		 */
+		reg &= ~H3_EPHY_SELECT;
 	}
 
 	if (!of_property_read_u32(node, "allwinner,tx-delay-ps", &val)) {
-- 
2.21.0

[PATCH v6 3/6] arm64: dts: allwinner: orange-pi-3: Enable ethernet

[megous]

From: Ondrej Jirman <megous@megous.com>

Orange Pi 3 has two regulators that power the Realtek RTL8211E. According
to the phy datasheet, both regulators need to be enabled at the same time,
but we can only specify a single phy-supply in the DT.

This can be achieved by making one regulator depedning on the other via
vin-supply. While it's not a technically correct description of the
hardware, it achieves the purpose.

All values of RX/TX delay were tested exhaustively and a middle one of the
working values was chosen.

Signed-off-by: Ondrej Jirman <megous@megous.com>
---
 .../dts/allwinner/sun50i-h6-orangepi-3.dts    | 44 +++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi-3.dts b/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi-3.dts
index 17d496990108..2c6807b74ff6 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi-3.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi-3.dts
@@ -15,6 +15,7 @@
 
 	aliases {
 		serial0 = &uart0;
+		ethernet0 = &emac;
 	};
 
 	chosen {
@@ -44,6 +45,27 @@
 		regulator-max-microvolt = <5000000>;
 		regulator-always-on;
 	};
+
+	/*
+	 * The board uses 2.5V RGMII signalling. Power sequence to enable
+	 * the phy is to enable GMAC-2V5 and GMAC-3V (aldo2) power rails
+	 * at the same time and to wait 100ms.
+	 */
+	reg_gmac_2v5: gmac-2v5 {
+		compatible = "regulator-fixed";
+		regulator-name = "gmac-2v5";
+		regulator-min-microvolt = <2500000>;
+		regulator-max-microvolt = <2500000>;
+		startup-delay-us = <100000>;
+		enable-active-high;
+		gpio = <&pio 3 6 GPIO_ACTIVE_HIGH>; /* PD6 */
+
+		/* The real parent of gmac-2v5 is reg_vcc5v, but we need to
+		 * enable two regulators to power the phy. This is one way
+		 * to achieve that.
+		 */
+		vin-supply = <&reg_aldo2>; /* GMAC-3V */
+	};
 };
 
 &cpu0 {
@@ -58,6 +80,28 @@
 	status = "okay";
 };
 
+&emac {
+	pinctrl-names = "default";
+	pinctrl-0 = <&ext_rgmii_pins>;
+	phy-mode = "rgmii";
+	phy-handle = <&ext_rgmii_phy>;
+	phy-supply = <&reg_gmac_2v5>;
+	allwinner,rx-delay-ps = <1500>;
+	allwinner,tx-delay-ps = <700>;
+	status = "okay";
+};
+
+&mdio {
+	ext_rgmii_phy: ethernet-phy@1 {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <1>;
+
+		reset-gpios = <&pio 3 14 GPIO_ACTIVE_LOW>; /* PD14 */
+		reset-assert-us = <15000>;
+		reset-deassert-us = <40000>;
+	};
+};
+
 &mmc0 {
 	vmmc-supply = <&reg_cldo1>;
 	cd-gpios = <&pio 5 6 GPIO_ACTIVE_LOW>; /* PF6 */
-- 
2.21.0

[PATCH v6 4/6] dt-bindings: display: hdmi-connector: Support DDC bus enable

[megous]

From: Ondrej Jirman <megous@megous.com>

Some Allwinner SoC using boards (Orange Pi 3 for example) need to enable
on-board voltage shifting logic for the DDC bus using a gpio to be able
to access DDC bus. Use ddc-en-gpios property on the hdmi-connector to
model this.

Add binding documentation for optional ddc-en-gpios property.

Signed-off-by: Ondrej Jirman <megous@megous.com>
---
 .../devicetree/bindings/display/connector/hdmi-connector.txt     | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/display/connector/hdmi-connector.txt b/Documentation/devicetree/bindings/display/connector/hdmi-connector.txt
index 508aee461e0d..aeb07c4bd703 100644
--- a/Documentation/devicetree/bindings/display/connector/hdmi-connector.txt
+++ b/Documentation/devicetree/bindings/display/connector/hdmi-connector.txt
@@ -9,6 +9,7 @@ Optional properties:
 - label: a symbolic name for the connector
 - hpd-gpios: HPD GPIO number
 - ddc-i2c-bus: phandle link to the I2C controller used for DDC EDID probing
+- ddc-en-gpios: signal to enable DDC bus
 
 Required nodes:
 - Video port for HDMI input
-- 
2.21.0

Re: [PATCH v6 4/6] dt-bindings: display: hdmi-connector: Support DDC bus enable

[Rob Herring]

On Mon, 27 May 2019 18:22:35 +0200, megous@megous.com wrote:
> From: Ondrej Jirman <megous@megous.com>
> 
> Some Allwinner SoC using boards (Orange Pi 3 for example) need to enable
> on-board voltage shifting logic for the DDC bus using a gpio to be able
> to access DDC bus. Use ddc-en-gpios property on the hdmi-connector to
> model this.
> 
> Add binding documentation for optional ddc-en-gpios property.
> 
> Signed-off-by: Ondrej Jirman <megous@megous.com>
> ---
>  .../devicetree/bindings/display/connector/hdmi-connector.txt     | 1 +
>  1 file changed, 1 insertion(+)
> 

Please add Acked-by/Reviewed-by tags when posting new versions. However,
there's no need to repost patches *only* to add the tags. The upstream
maintainer will do that for acks received on the version they apply.

If a tag was not added on purpose, please state why and what changed.

Re: [PATCH v6 4/6] dt-bindings: display: hdmi-connector: Support DDC bus enable

[Ondřej Jirman]

On Tue, Jun 11, 2019 at 03:52:06PM -0600, Rob Herring wrote:
> On Mon, 27 May 2019 18:22:35 +0200, megous@megous.com wrote:
> > From: Ondrej Jirman <megous@megous.com>
> > 
> > Some Allwinner SoC using boards (Orange Pi 3 for example) need to enable
> > on-board voltage shifting logic for the DDC bus using a gpio to be able
> > to access DDC bus. Use ddc-en-gpios property on the hdmi-connector to
> > model this.
> > 
> > Add binding documentation for optional ddc-en-gpios property.
> > 
> > Signed-off-by: Ondrej Jirman <megous@megous.com>
> > ---
> >  .../devicetree/bindings/display/connector/hdmi-connector.txt     | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> 
> Please add Acked-by/Reviewed-by tags when posting new versions. However,
> there's no need to repost patches *only* to add the tags. The upstream
> maintainer will do that for acks received on the version they apply.
> 
> If a tag was not added on purpose, please state why and what changed.

Sorry, it was some mistake. Thanks for the note.

regards,
	Ondrej

> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v6 5/6] drm: sun4i: Add support for enabling DDC I2C bus to sun8i_dw_hdmi glue

[megous]

From: Ondrej Jirman <megous@megous.com>

Orange Pi 3 board requires enabling a voltage shifting circuit via GPIO
for the DDC bus to be usable.

Add support for hdmi-connector node's optional ddc-en-gpios property to
support this use case.

Signed-off-by: Ondrej Jirman <megous@megous.com>
---
 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c | 55 +++++++++++++++++++++++++--
 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h |  3 ++
 2 files changed, 55 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
index 39d8509d96a0..59b81ba02d96 100644
--- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
+++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
@@ -98,6 +98,30 @@ static u32 sun8i_dw_hdmi_find_possible_crtcs(struct drm_device *drm,
 	return crtcs;
 }
 
+static int sun8i_dw_hdmi_find_connector_pdev(struct device *dev,
+					     struct platform_device **pdev_out)
+{
+	struct platform_device *pdev;
+	struct device_node *remote;
+
+	remote = of_graph_get_remote_node(dev->of_node, 1, -1);
+	if (!remote)
+		return -ENODEV;
+
+	if (!of_device_is_compatible(remote, "hdmi-connector")) {
+		of_node_put(remote);
+		return -ENODEV;
+	}
+
+	pdev = of_find_device_by_node(remote);
+	of_node_put(remote);
+	if (!pdev)
+		return -ENODEV;
+
+	*pdev_out = pdev;
+	return 0;
+}
+
 static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master,
 			      void *data)
 {
@@ -151,16 +175,29 @@ static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master,
 		return PTR_ERR(hdmi->regulator);
 	}
 
+	ret = sun8i_dw_hdmi_find_connector_pdev(dev, &hdmi->connector_pdev);
+	if (!ret) {
+		hdmi->ddc_en = gpiod_get_optional(&hdmi->connector_pdev->dev,
+						  "ddc-en", GPIOD_OUT_HIGH);
+		if (IS_ERR(hdmi->ddc_en)) {
+			platform_device_put(hdmi->connector_pdev);
+			dev_err(dev, "Couldn't get ddc-en gpio\n");
+			return PTR_ERR(hdmi->ddc_en);
+		}
+	}
+
 	ret = regulator_enable(hdmi->regulator);
 	if (ret) {
 		dev_err(dev, "Failed to enable regulator\n");
-		return ret;
+		goto err_unref_ddc_en;
 	}
 
+	gpiod_set_value(hdmi->ddc_en, 1);
+
 	ret = reset_control_deassert(hdmi->rst_ctrl);
 	if (ret) {
 		dev_err(dev, "Could not deassert ctrl reset control\n");
-		goto err_disable_regulator;
+		goto err_disable_ddc_en;
 	}
 
 	ret = clk_prepare_enable(hdmi->clk_tmds);
@@ -213,8 +250,14 @@ static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master,
 	clk_disable_unprepare(hdmi->clk_tmds);
 err_assert_ctrl_reset:
 	reset_control_assert(hdmi->rst_ctrl);
-err_disable_regulator:
+err_disable_ddc_en:
+	gpiod_set_value(hdmi->ddc_en, 0);
 	regulator_disable(hdmi->regulator);
+err_unref_ddc_en:
+	if (hdmi->ddc_en)
+		gpiod_put(hdmi->ddc_en);
+
+	platform_device_put(hdmi->connector_pdev);
 
 	return ret;
 }
@@ -228,7 +271,13 @@ static void sun8i_dw_hdmi_unbind(struct device *dev, struct device *master,
 	sun8i_hdmi_phy_remove(hdmi);
 	clk_disable_unprepare(hdmi->clk_tmds);
 	reset_control_assert(hdmi->rst_ctrl);
+	gpiod_set_value(hdmi->ddc_en, 0);
 	regulator_disable(hdmi->regulator);
+
+	if (hdmi->ddc_en)
+		gpiod_put(hdmi->ddc_en);
+
+	platform_device_put(hdmi->connector_pdev);
 }
 
 static const struct component_ops sun8i_dw_hdmi_ops = {
diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
index 720c5aa8adc1..dad66b8301c2 100644
--- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
+++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
@@ -9,6 +9,7 @@
 #include <drm/bridge/dw_hdmi.h>
 #include <drm/drm_encoder.h>
 #include <linux/clk.h>
+#include <linux/gpio/consumer.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <linux/reset.h>
@@ -190,6 +191,8 @@ struct sun8i_dw_hdmi {
 	struct regulator		*regulator;
 	const struct sun8i_dw_hdmi_quirks *quirks;
 	struct reset_control		*rst_ctrl;
+	struct platform_device		*connector_pdev;
+	struct gpio_desc		*ddc_en;
 };
 
 static inline struct sun8i_dw_hdmi *
-- 
2.21.0

Re: [linux-sunxi] [PATCH v6 5/6] drm: sun4i: Add support for enabling DDC I2C bus to sun8i_dw_hdmi glue

[Jernej Škrabec]

Hi Ondrej!

Dne ponedeljek, 27. maj 2019 ob 18:22:36 CEST je megous via linux-sunxi 
napisal(a):
> From: Ondrej Jirman <megous@megous.com>
> 
> Orange Pi 3 board requires enabling a voltage shifting circuit via GPIO
> for the DDC bus to be usable.
> 
> Add support for hdmi-connector node's optional ddc-en-gpios property to
> support this use case.
> 
> Signed-off-by: Ondrej Jirman <megous@megous.com>
> ---
>  drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c | 55 +++++++++++++++++++++++++--
>  drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h |  3 ++
>  2 files changed, 55 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
> b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c index 39d8509d96a0..59b81ba02d96
> 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
> +++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
> @@ -98,6 +98,30 @@ static u32 sun8i_dw_hdmi_find_possible_crtcs(struct
> drm_device *drm, return crtcs;
>  }
> 
> +static int sun8i_dw_hdmi_find_connector_pdev(struct device *dev,
> +					     struct 
platform_device **pdev_out)
> +{
> +	struct platform_device *pdev;
> +	struct device_node *remote;
> +
> +	remote = of_graph_get_remote_node(dev->of_node, 1, -1);
> +	if (!remote)
> +		return -ENODEV;
> +
> +	if (!of_device_is_compatible(remote, "hdmi-connector")) {
> +		of_node_put(remote);
> +		return -ENODEV;
> +	}
> +
> +	pdev = of_find_device_by_node(remote);
> +	of_node_put(remote);
> +	if (!pdev)
> +		return -ENODEV;
> +
> +	*pdev_out = pdev;
> +	return 0;
> +}
> +
>  static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master,
>  			      void *data)
>  {
> @@ -151,16 +175,29 @@ static int sun8i_dw_hdmi_bind(struct device *dev,
> struct device *master, return PTR_ERR(hdmi->regulator);
>  	}
> 
> +	ret = sun8i_dw_hdmi_find_connector_pdev(dev, &hdmi->connector_pdev);
> +	if (!ret) {
> +		hdmi->ddc_en = gpiod_get_optional(&hdmi->connector_pdev-
>dev,
> +						  "ddc-en", 
GPIOD_OUT_HIGH);
> +		if (IS_ERR(hdmi->ddc_en)) {
> +			platform_device_put(hdmi->connector_pdev);
> +			dev_err(dev, "Couldn't get ddc-en gpio\n");
> +			return PTR_ERR(hdmi->ddc_en);
> +		}
> +	}
> +
>  	ret = regulator_enable(hdmi->regulator);
>  	if (ret) {
>  		dev_err(dev, "Failed to enable regulator\n");
> -		return ret;
> +		goto err_unref_ddc_en;
>  	}
> 
> +	gpiod_set_value(hdmi->ddc_en, 1);

Why don't you do that inside if clause where hdmi->ddc_en is assigned? It's 
not useful otherwise anyway.

Besides, you would then only need to adjust one goto label in error path.

> +
>  	ret = reset_control_deassert(hdmi->rst_ctrl);
>  	if (ret) {
>  		dev_err(dev, "Could not deassert ctrl reset 
control\n");
> -		goto err_disable_regulator;
> +		goto err_disable_ddc_en;
>  	}
> 
>  	ret = clk_prepare_enable(hdmi->clk_tmds);
> @@ -213,8 +250,14 @@ static int sun8i_dw_hdmi_bind(struct device *dev,
> struct device *master, clk_disable_unprepare(hdmi->clk_tmds);
>  err_assert_ctrl_reset:
>  	reset_control_assert(hdmi->rst_ctrl);
> -err_disable_regulator:
> +err_disable_ddc_en:
> +	gpiod_set_value(hdmi->ddc_en, 0);
>  	regulator_disable(hdmi->regulator);
> +err_unref_ddc_en:
> +	if (hdmi->ddc_en)
> +		gpiod_put(hdmi->ddc_en);
> +
> +	platform_device_put(hdmi->connector_pdev);
> 
>  	return ret;
>  }
> @@ -228,7 +271,13 @@ static void sun8i_dw_hdmi_unbind(struct device *dev,
> struct device *master, sun8i_hdmi_phy_remove(hdmi);
>  	clk_disable_unprepare(hdmi->clk_tmds);
>  	reset_control_assert(hdmi->rst_ctrl);
> +	gpiod_set_value(hdmi->ddc_en, 0);
>  	regulator_disable(hdmi->regulator);
> +
> +	if (hdmi->ddc_en)
> +		gpiod_put(hdmi->ddc_en);
> +
> +	platform_device_put(hdmi->connector_pdev);
>  }
> 
>  static const struct component_ops sun8i_dw_hdmi_ops = {
> diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
> b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h index 720c5aa8adc1..dad66b8301c2
> 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
> +++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
> @@ -9,6 +9,7 @@
>  #include <drm/bridge/dw_hdmi.h>
>  #include <drm/drm_encoder.h>
>  #include <linux/clk.h>
> +#include <linux/gpio/consumer.h>
>  #include <linux/regmap.h>
>  #include <linux/regulator/consumer.h>
>  #include <linux/reset.h>
> @@ -190,6 +191,8 @@ struct sun8i_dw_hdmi {
>  	struct regulator		*regulator;
>  	const struct sun8i_dw_hdmi_quirks *quirks;
>  	struct reset_control		*rst_ctrl;
> +	struct platform_device		*connector_pdev;

It seems that connector_pdev is needed only during intialization. Why do you 
store it?

Best regards,
Jernej

> +	struct gpio_desc		*ddc_en;
>  };
> 
>  static inline struct sun8i_dw_hdmi *

Re: [linux-sunxi] [PATCH v6 5/6] drm: sun4i: Add support for enabling DDC I2C bus to sun8i_dw_hdmi glue

[Ondřej Jirman]

Hi Jernej,

On Sun, Jun 16, 2019 at 01:05:13PM +0200, Jernej Škrabec wrote:
> Hi Ondrej!
> 
> Dne ponedeljek, 27. maj 2019 ob 18:22:36 CEST je megous via linux-sunxi 
> napisal(a):
> > From: Ondrej Jirman <megous@megous.com>
> > 
> > Orange Pi 3 board requires enabling a voltage shifting circuit via GPIO
> > for the DDC bus to be usable.
> > 
> > Add support for hdmi-connector node's optional ddc-en-gpios property to
> > support this use case.
> > 
> > Signed-off-by: Ondrej Jirman <megous@megous.com>
> > ---
> >  drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c | 55 +++++++++++++++++++++++++--
> >  drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h |  3 ++
> >  2 files changed, 55 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
> > b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c index 39d8509d96a0..59b81ba02d96
> > 100644
> > --- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
> > +++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
> > @@ -98,6 +98,30 @@ static u32 sun8i_dw_hdmi_find_possible_crtcs(struct
> > drm_device *drm, return crtcs;
> >  }
> > 
> > +static int sun8i_dw_hdmi_find_connector_pdev(struct device *dev,
> > +					     struct 
> platform_device **pdev_out)
> > +{
> > +	struct platform_device *pdev;
> > +	struct device_node *remote;
> > +
> > +	remote = of_graph_get_remote_node(dev->of_node, 1, -1);
> > +	if (!remote)
> > +		return -ENODEV;
> > +
> > +	if (!of_device_is_compatible(remote, "hdmi-connector")) {
> > +		of_node_put(remote);
> > +		return -ENODEV;
> > +	}
> > +
> > +	pdev = of_find_device_by_node(remote);
> > +	of_node_put(remote);
> > +	if (!pdev)
> > +		return -ENODEV;
> > +
> > +	*pdev_out = pdev;
> > +	return 0;
> > +}
> > +
> >  static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master,
> >  			      void *data)
> >  {
> > @@ -151,16 +175,29 @@ static int sun8i_dw_hdmi_bind(struct device *dev,
> > struct device *master, return PTR_ERR(hdmi->regulator);
> >  	}
> > 
> > +	ret = sun8i_dw_hdmi_find_connector_pdev(dev, &hdmi->connector_pdev);
> > +	if (!ret) {
> > +		hdmi->ddc_en = gpiod_get_optional(&hdmi->connector_pdev-
> >dev,
> > +						  "ddc-en", 
> GPIOD_OUT_HIGH);
> > +		if (IS_ERR(hdmi->ddc_en)) {
> > +			platform_device_put(hdmi->connector_pdev);
> > +			dev_err(dev, "Couldn't get ddc-en gpio\n");
> > +			return PTR_ERR(hdmi->ddc_en);
> > +		}
> > +	}
> > +
> >  	ret = regulator_enable(hdmi->regulator);
> >  	if (ret) {
> >  		dev_err(dev, "Failed to enable regulator\n");
> > -		return ret;
> > +		goto err_unref_ddc_en;
> >  	}
> > 
> > +	gpiod_set_value(hdmi->ddc_en, 1);
> 
> Why don't you do that inside if clause where hdmi->ddc_en is assigned? It's 
> not useful otherwise anyway.
> 
> Besides, you would then only need to adjust one goto label in error path.

The idea is to enable DDC after enabling the regulator. I don't think it matters
for the particular HW that's on Orange Pi 3, and similar Xunlong boards, but
this is a fairly generic binding and it makes more sense to power the bus, and
then enable whatever aditional circuitry might be there for the IO.

I can move sun8i_dw_hdmi_find_connector_pdev lower, but I would then need to
disable the regulator in the error path, and I like to keep this order:

- parsing DT
- enabling actual HW stuff

Because parsing is likely to fail with DEFERED_PROBE, because GPIO or whatever
else is not yet ready, and this approach avoids enabling/disabling the HW
needlessly.

> > +
> >  	ret = reset_control_deassert(hdmi->rst_ctrl);
> >  	if (ret) {
> >  		dev_err(dev, "Could not deassert ctrl reset 
> control\n");
> > -		goto err_disable_regulator;
> > +		goto err_disable_ddc_en;
> >  	}
> > 
> >  	ret = clk_prepare_enable(hdmi->clk_tmds);
> > @@ -213,8 +250,14 @@ static int sun8i_dw_hdmi_bind(struct device *dev,
> > struct device *master, clk_disable_unprepare(hdmi->clk_tmds);
> >  err_assert_ctrl_reset:
> >  	reset_control_assert(hdmi->rst_ctrl);
> > -err_disable_regulator:
> > +err_disable_ddc_en:
> > +	gpiod_set_value(hdmi->ddc_en, 0);
> >  	regulator_disable(hdmi->regulator);
> > +err_unref_ddc_en:
> > +	if (hdmi->ddc_en)
> > +		gpiod_put(hdmi->ddc_en);
> > +
> > +	platform_device_put(hdmi->connector_pdev);
> > 
> >  	return ret;
> >  }
> > @@ -228,7 +271,13 @@ static void sun8i_dw_hdmi_unbind(struct device *dev,
> > struct device *master, sun8i_hdmi_phy_remove(hdmi);
> >  	clk_disable_unprepare(hdmi->clk_tmds);
> >  	reset_control_assert(hdmi->rst_ctrl);
> > +	gpiod_set_value(hdmi->ddc_en, 0);
> >  	regulator_disable(hdmi->regulator);
> > +
> > +	if (hdmi->ddc_en)
> > +		gpiod_put(hdmi->ddc_en);
> > +
> > +	platform_device_put(hdmi->connector_pdev);
> >  }
> > 
> >  static const struct component_ops sun8i_dw_hdmi_ops = {
> > diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
> > b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h index 720c5aa8adc1..dad66b8301c2
> > 100644
> > --- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
> > +++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
> > @@ -9,6 +9,7 @@
> >  #include <drm/bridge/dw_hdmi.h>
> >  #include <drm/drm_encoder.h>
> >  #include <linux/clk.h>
> > +#include <linux/gpio/consumer.h>
> >  #include <linux/regmap.h>
> >  #include <linux/regulator/consumer.h>
> >  #include <linux/reset.h>
> > @@ -190,6 +191,8 @@ struct sun8i_dw_hdmi {
> >  	struct regulator		*regulator;
> >  	const struct sun8i_dw_hdmi_quirks *quirks;
> >  	struct reset_control		*rst_ctrl;
> > +	struct platform_device		*connector_pdev;
> 
> It seems that connector_pdev is needed only during intialization. Why do you 
> store it?

For some reason I thought that I need to keep it to keep the GPIO available,
but that's not true. I'll drop it.

thank you,
	Ondrej

> Best regards,
> Jernej
> 
> > +	struct gpio_desc		*ddc_en;
> >  };
> > 
> >  static inline struct sun8i_dw_hdmi *

[PATCH v6 6/6] arm64: dts: allwinner: orange-pi-3: Enable HDMI output

[megous]

From: Ondrej Jirman <megous@megous.com>

Orange Pi 3 has a DDC_CEC_EN signal connected to PH2, that enables the DDC
I2C bus voltage shifter. Before EDID can be read, we need to pull PH2 high.
This is realized by the ddc-en-gpios property.

Signed-off-by: Ondrej Jirman <megous@megous.com>
---
 .../dts/allwinner/sun50i-h6-orangepi-3.dts    | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi-3.dts b/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi-3.dts
index 2c6807b74ff6..01bb1bafe284 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi-3.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi-3.dts
@@ -22,6 +22,18 @@
 		stdout-path = "serial0:115200n8";
 	};
 
+	connector {
+		compatible = "hdmi-connector";
+		ddc-en-gpios = <&pio 7 2 GPIO_ACTIVE_HIGH>; /* PH2 */
+		type = "a";
+
+		port {
+			hdmi_con_in: endpoint {
+				remote-endpoint = <&hdmi_out_con>;
+			};
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 
@@ -72,6 +84,10 @@
 	cpu-supply = <&reg_dcdca>;
 };
 
+&de {
+	status = "okay";
+};
+
 &ehci0 {
 	status = "okay";
 };
@@ -91,6 +107,16 @@
 	status = "okay";
 };
 
+&hdmi {
+	status = "okay";
+};
+
+&hdmi_out {
+	hdmi_out_con: endpoint {
+		remote-endpoint = <&hdmi_con_in>;
+	};
+};
+
 &mdio {
 	ext_rgmii_phy: ethernet-phy@1 {
 		compatible = "ethernet-phy-ieee802.3-c22";
-- 
2.21.0

Re: [linux-sunxi] [PATCH v6 0/6] Add support for Orange Pi 3

[Ondřej Jirman]

Hello,

On Mon, May 27, 2019 at 06:22:31PM +0200, megous via linux-sunxi wrote:
> From: Ondrej Jirman <megous@megous.com>
> 
> This series implements support for Xunlong Orange Pi 3 board.
> 
> Unfortunately, this board needs some small driver patches, so I have
> split the boards DT patch into chunks that require patches for drivers
> in various subsystems.
> 
> Suggested merging plan/dependencies:
> 
> - stmmac patches are needed for ethernet support (patches 1-3)
>   - these should be ready now
> - HDMI support (patches 4-6)
>   - should be ready

If there are no futher comments, can all these patches please be merged?

thank you and kind regards,
	Ondrej

> Changes in v2:
> - added dt-bindings documentation for the board's compatible string
>   (suggested by Clement)
> - addressed checkpatch warnings and code formatting issues (on Maxime's
>   suggestions)
> - stmmac: dropped useless parenthesis, reworded description of the patch
>   (suggested by Sergei)
> - drop useles dev_info() about the selected io bias voltage
> - docummented io voltage bias selection variant macros
> - wifi: marked WiFi DTS patch and realted mmc1_pins as "DO NOT MERGE",
>   because wifi depends on H6 RTC support that's not merged yet (suggested
>   by Clement)
> - added missing signed-of-bys
> - changed &usb2otg dr_mode to otg, and added a note about VBUS
> - improved wording of HDMI driver's DDC power supply patch
> 
> Changes in v3:
> - dropped already applied patches
> - changed pinctrl I/O bias selection constants to enum and renamed
> - added /omit-if-no-ref/ to mmc1_pins
> - made mmc1_pins default pinconf for mmc1 in H6 dtsi
> - move ddc-supply to HDMI connector node, updated patch descriptions,
>   changed dt-bindings docs
> 
> Changes in v4:
> - fix checkpatch warnings/style issues
> - use enum in struct sunxi_desc_function for io_bias_cfg_variant
> - collected acked-by's
> - fix compile error in drivers/pinctrl/sunxi/pinctrl-sun9i-a80-r.c:156
>   caused by missing conversion from has_io_bias_cfg struct member
>   (I've kept the acked-by, because it's a trivial change, but feel free
>   to object.) (reported by Martin A. on github)
>   I did not have A80 pinctrl enabled for some reason, so I did not catch
>   this sooner.
> - dropped brcm firmware patch (was already applied)
> - dropped the wifi dts patch (will re-send after H6 RTC gets merged,
>   along with bluetooth support, in a separate series)
> 
> Changes in v5:
> - dropped already applied patches (pinctrl patches, mmc1 pinconf patch)
> - rename GMAC-3V3 -> GMAC-3V to match the schematic (Jagan)
> - changed hdmi-connector's ddc-supply property to ddc-en-gpios
>   (Rob Herring)
> 
> Changes in v6:
> - added dt-bindings reviewed-by tag
> - fix wording in stmmac commit (as suggested by Sergei)
> 
> Please take a look.
> 
> thank you and regards,
>   Ondrej Jirman
> 
> Icenowy Zheng (2):
>   net: stmmac: sun8i: add support for Allwinner H6 EMAC
>   net: stmmac: sun8i: force select external PHY when no internal one
> 
> Ondrej Jirman (4):
>   arm64: dts: allwinner: orange-pi-3: Enable ethernet
>   dt-bindings: display: hdmi-connector: Support DDC bus enable
>   drm: sun4i: Add support for enabling DDC I2C bus to sun8i_dw_hdmi glue
>   arm64: dts: allwinner: orange-pi-3: Enable HDMI output
> 
>  .../display/connector/hdmi-connector.txt      |  1 +
>  .../dts/allwinner/sun50i-h6-orangepi-3.dts    | 70 +++++++++++++++++++
>  drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c         | 55 ++++++++++++++-
>  drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h         |  3 +
>  .../net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 21 ++++++
>  5 files changed, 147 insertions(+), 3 deletions(-)
> 
> -- 
> 2.21.0
> 
> -- 
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Re: [linux-sunxi] [PATCH v6 0/6] Add support for Orange Pi 3

[Maxime Ripard]

On Fri, May 31, 2019 at 02:52:46PM +0200, Ondřej Jirman wrote:
> Hello,
>
> On Mon, May 27, 2019 at 06:22:31PM +0200, megous via linux-sunxi wrote:
> > From: Ondrej Jirman <megous@megous.com>
> >
> > This series implements support for Xunlong Orange Pi 3 board.
> >
> > Unfortunately, this board needs some small driver patches, so I have
> > split the boards DT patch into chunks that require patches for drivers
> > in various subsystems.
> >
> > Suggested merging plan/dependencies:
> >
> > - stmmac patches are needed for ethernet support (patches 1-3)
> >   - these should be ready now
> > - HDMI support (patches 4-6)
> >   - should be ready
>
> If there are no futher comments, can all these patches please be merged?

I'm waiting for some feedback on the stmmac and the DW-HDMI
developpers to merge the rest

Maxime

--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com