[PATCH V7 0/3] Generic PHY driver for the Exynos SoC DP PHY

[PATCH V7 0/3] Generic PHY driver for the Exynos SoC DP PHY

[Jingoo Han]

This patch series adds a simple driver for the Samsung Exynos SoC
series DP transmitter PHY, using the generic PHY framework [1].
Previously the DP PHY used an internal DT node to control the PHY
power enable bit.

These patches was tested on Exynos5250.

This PATCH v7 follows:
 * PATCH v6, sent on July, 9th 2013
 * PATCH v5, sent on July, 8th 2013
 * PATCH v4, sent on July, 2nd 2013
 * PATCH v3, sent on July, 1st 2013
 * PATCH v2, sent on June, 28th 2013
 * PATCH v1, sent on June, 28th 2013

Changes from v6:
  * Re-based on git://git.kernel.org/pub/scm/linux/kernel/git/kishon/linux-phy.git

Changes from v5:
  * Re-based on git://gitorious.org/linuxphy/linuxphy.git

Changes from v4:
  * Marked original bindings as deprecated in 'exynos_dp.txt'
  * Fixed typo of commit message.
  * Added Tomasz Figa's Reviewed-by.

Changes from v3:
  * Added OF dependancy.
  * Removed redundant local variable 'void __iomem *addr'.
  * Removed unnecessary dev_set_drvdata().
  * Added a patch that remove non-DT support for Exynos
    Display Port driver.
  * Removed unnecessary 'struct exynos_dp_platdata'.
  * Kept supporting the original bindings for DT compatibility.

Changes from v2:
  * Removed redundant spinlock
  * Removed 'struct phy' from 'struct exynos_dp_video_phy'
  * Updated 'samsung-phy.txt', instead of creating
    'samsung,exynos5250-dp-video-phy.txt'.
  * Removed unnecessary additional specifier from 'phys'
    DT property.
  * Added 'phys', 'phy-names' properties to 'exynos_dp.txt' file.
  * Added Felipe Balbi's Acked-by.

Changes from v1:
  * Replaced exynos_dp_video_phy_xlate() with of_phy_simple_xlate(),
    as Kishon Vijay Abraham I guided.
  * Set the value of phy-cells as 0, because the phy_provider implements
    only one PHY.
  * Removed unnecessary header include.
  * Added '#ifdef CONFIG_OF' and of_match_ptr macro.

This series depends on the generic PHY framework [1]. These patches
refer to Sylwester Nawrocki's patches about Exynos MIPI [2].

[1] http://lwn.net/Articles/564188/
[2] http://www.spinics.net/lists/linux-samsung-soc/msg20098.html

Jingoo Han (3):
  phy: Add driver for Exynos DP PHY
  video: exynos_dp: remove non-DT support for Exynos Display Port
  video: exynos_dp: Use the generic PHY driver

 .../devicetree/bindings/phy/samsung-phy.txt        |    7 ++
 .../devicetree/bindings/video/exynos_dp.txt        |   17 +--
 drivers/phy/Kconfig                                |    7 ++
 drivers/phy/Makefile                               |    7 +-
 drivers/phy/phy-exynos-dp-video.c                  |  111 ++++++++++++++++
 drivers/video/exynos/Kconfig                       |    2 +-
 drivers/video/exynos/exynos_dp_core.c              |  132 ++++++--------------
 drivers/video/exynos/exynos_dp_core.h              |  110 ++++++++++++++++
 drivers/video/exynos/exynos_dp_reg.c               |    2 -
 include/video/exynos_dp.h                          |  131 -------------------
 10 files changed, 286 insertions(+), 240 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/phy/samsung-phy.txt
 create mode 100644 drivers/phy/phy-exynos-dp-video.c
 delete mode 100644 include/video/exynos_dp.h
--
1.7.10.4

[PATCH 1/3] phy: Add driver for Exynos DP PHY

[Jingoo Han]

Add a PHY provider driver for the Samsung Exynos SoC Display Port PHY.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Felipe Balbi <balbi@ti.com>
---
 .../devicetree/bindings/phy/samsung-phy.txt        |    7 ++
 drivers/phy/Kconfig                                |    7 ++
 drivers/phy/Makefile                               |    7 +-
 drivers/phy/phy-exynos-dp-video.c                  |  111 ++++++++++++++++++++
 4 files changed, 129 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/phy/samsung-phy.txt
 create mode 100644 drivers/phy/phy-exynos-dp-video.c

diff --git a/Documentation/devicetree/bindings/phy/samsung-phy.txt b/Documentation/devicetree/bindings/phy/samsung-phy.txt
new file mode 100644
index 0000000..ee262238
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/samsung-phy.txt
@@ -0,0 +1,7 @@
+Samsung EXYNOS SoC series Display Port PHY
+-------------------------------------------------
+
+Required properties:
+- compatible : should be "samsung,exynos5250-dp-video-phy";
+- reg : offset and length of the Display Port PHY register set;
+- #phy-cells : from the generic PHY bindings, must be 0;
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index ac239ac..fed26a0 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -38,4 +38,11 @@ config TWL4030_USB
 	  This transceiver supports high and full speed devices plus,
 	  in host mode, low speed.
 
+config PHY_EXYNOS_DP_VIDEO
+	tristate "EXYNOS SoC series Display Port PHY driver"
+	depends on OF
+	select GENERIC_PHY
+	help
+	  Support for Display Port PHY found on Samsung EXYNOS SoCs.
+
 endmenu
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 0dd8a98..433e685 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -2,6 +2,7 @@
 # Makefile for the phy drivers.
 #
 
-obj-$(CONFIG_GENERIC_PHY)	+= phy-core.o
-obj-$(CONFIG_OMAP_USB2)		+= phy-omap-usb2.o
-obj-$(CONFIG_TWL4030_USB)	+= phy-twl4030-usb.o
+obj-$(CONFIG_GENERIC_PHY)		+= phy-core.o
+obj-$(CONFIG_OMAP_USB2)			+= phy-omap-usb2.o
+obj-$(CONFIG_TWL4030_USB)		+= phy-twl4030-usb.o
+obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO)	+= phy-exynos-dp-video.o
diff --git a/drivers/phy/phy-exynos-dp-video.c b/drivers/phy/phy-exynos-dp-video.c
new file mode 100644
index 0000000..1dbe6ce
--- /dev/null
+++ b/drivers/phy/phy-exynos-dp-video.c
@@ -0,0 +1,111 @@
+/*
+ * Samsung EXYNOS SoC series Display Port PHY driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Author: Jingoo Han <jg1.han@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+
+/* DPTX_PHY_CONTROL register */
+#define EXYNOS_DPTX_PHY_ENABLE		(1 << 0)
+
+struct exynos_dp_video_phy {
+	void __iomem *regs;
+};
+
+static int __set_phy_state(struct exynos_dp_video_phy *state, unsigned int on)
+{
+	u32 reg;
+
+	reg = readl(state->regs);
+	if (on)
+		reg |= EXYNOS_DPTX_PHY_ENABLE;
+	else
+		reg &= ~EXYNOS_DPTX_PHY_ENABLE;
+	writel(reg, state->regs);
+
+	return 0;
+}
+
+static int exynos_dp_video_phy_power_on(struct phy *phy)
+{
+	struct exynos_dp_video_phy *state = phy_get_drvdata(phy);
+
+	return __set_phy_state(state, 1);
+}
+
+static int exynos_dp_video_phy_power_off(struct phy *phy)
+{
+	struct exynos_dp_video_phy *state = phy_get_drvdata(phy);
+
+	return __set_phy_state(state, 0);
+}
+
+static struct phy_ops exynos_dp_video_phy_ops = {
+	.power_on	= exynos_dp_video_phy_power_on,
+	.power_off	= exynos_dp_video_phy_power_off,
+	.owner		= THIS_MODULE,
+};
+
+static int exynos_dp_video_phy_probe(struct platform_device *pdev)
+{
+	struct exynos_dp_video_phy *state;
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	struct phy_provider *phy_provider;
+	struct phy *phy;
+
+	state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
+	if (!state)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+	state->regs = devm_ioremap_resource(dev, res);
+	if (IS_ERR(state->regs))
+		return PTR_ERR(state->regs);
+
+	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+	if (IS_ERR(phy_provider))
+		return PTR_ERR(phy_provider);
+
+	phy = devm_phy_create(dev, &exynos_dp_video_phy_ops, NULL);
+	if (IS_ERR(phy)) {
+		dev_err(dev, "failed to create Display Port PHY\n");
+		return PTR_ERR(phy);
+	}
+	phy_set_drvdata(phy, state);
+
+	return 0;
+}
+
+static const struct of_device_id exynos_dp_video_phy_of_match[] = {
+	{ .compatible = "samsung,exynos5250-dp-video-phy" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, exynos_dp_video_phy_of_match);
+
+static struct platform_driver exynos_dp_video_phy_driver = {
+	.probe	= exynos_dp_video_phy_probe,
+	.driver = {
+		.name	= "exynos-dp-video-phy",
+		.owner	= THIS_MODULE,
+		.of_match_table	= exynos_dp_video_phy_of_match,
+	}
+};
+module_platform_driver(exynos_dp_video_phy_driver);
+
+MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
+MODULE_DESCRIPTION("Samsung EXYNOS SoC DP PHY driver");
+MODULE_LICENSE("GPL v2");
-- 
1.7.10.4

[PATCH 2/3] video: exynos_dp: remove non-DT support for Exynos Display Port

[Jingoo Han]

Exynos Display Port can be used only for Exynos SoCs. In addition,
non-DT for EXYNOS SoCs is not supported from v3.11; thus, there is
no need to support non-DT for Exynos Display Port.

The 'include/video/exynos_dp.h' file has been used for non-DT
support and the content of file include/video/exynos_dp.h is moved
to drivers/video/exynos/exynos_dp_core.h. Thus, the 'exynos_dp.h'
file is removed. Also, 'struct exynos_dp_platdata' is removed,
because it is not used any more.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
---
 drivers/video/exynos/Kconfig          |    2 +-
 drivers/video/exynos/exynos_dp_core.c |  116 +++++++----------------------
 drivers/video/exynos/exynos_dp_core.h |  109 +++++++++++++++++++++++++++
 drivers/video/exynos/exynos_dp_reg.c  |    2 -
 include/video/exynos_dp.h             |  131 ---------------------------------
 5 files changed, 135 insertions(+), 225 deletions(-)
 delete mode 100644 include/video/exynos_dp.h

diff --git a/drivers/video/exynos/Kconfig b/drivers/video/exynos/Kconfig
index 1b035b2..fab9019 100644
--- a/drivers/video/exynos/Kconfig
+++ b/drivers/video/exynos/Kconfig
@@ -29,7 +29,7 @@ config EXYNOS_LCD_S6E8AX0
 
 config EXYNOS_DP
 	bool "EXYNOS DP driver support"
-	depends on ARCH_EXYNOS
+	depends on OF && ARCH_EXYNOS
 	default n
 	help
 	  This enables support for DP device.
diff --git a/drivers/video/exynos/exynos_dp_core.c b/drivers/video/exynos/exynos_dp_core.c
index 12bbede..05fed7d 100644
--- a/drivers/video/exynos/exynos_dp_core.c
+++ b/drivers/video/exynos/exynos_dp_core.c
@@ -20,8 +20,6 @@
 #include <linux/delay.h>
 #include <linux/of.h>
 
-#include <video/exynos_dp.h>
-
 #include "exynos_dp_core.h"
 
 static int exynos_dp_init_dp(struct exynos_dp_device *dp)
@@ -894,26 +892,17 @@ static void exynos_dp_hotplug(struct work_struct *work)
 		dev_err(dp->dev, "unable to config video\n");
 }
 
-#ifdef CONFIG_OF
-static struct exynos_dp_platdata *exynos_dp_dt_parse_pdata(struct device *dev)
+static struct video_info *exynos_dp_dt_parse_pdata(struct device *dev)
 {
 	struct device_node *dp_node = dev->of_node;
-	struct exynos_dp_platdata *pd;
 	struct video_info *dp_video_config;
 
-	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
-	if (!pd) {
-		dev_err(dev, "memory allocation for pdata failed\n");
-		return ERR_PTR(-ENOMEM);
-	}
 	dp_video_config = devm_kzalloc(dev,
 				sizeof(*dp_video_config), GFP_KERNEL);
-
 	if (!dp_video_config) {
 		dev_err(dev, "memory allocation for video config failed\n");
 		return ERR_PTR(-ENOMEM);
 	}
-	pd->video_info = dp_video_config;
 
 	dp_video_config->h_sync_polarity  		of_property_read_bool(dp_node, "hsync-active-high");
@@ -960,7 +949,7 @@ static struct exynos_dp_platdata *exynos_dp_dt_parse_pdata(struct device *dev)
 		return ERR_PTR(-EINVAL);
 	}
 
-	return pd;
+	return dp_video_config;
 }
 
 static int exynos_dp_dt_parse_phydata(struct exynos_dp_device *dp)
@@ -1003,48 +992,30 @@ err:
 
 static void exynos_dp_phy_init(struct exynos_dp_device *dp)
 {
-	u32 reg;
+	if (dp->phy_addr) {
+		u32 reg;
 
-	reg = __raw_readl(dp->phy_addr);
-	reg |= dp->enable_mask;
-	__raw_writel(reg, dp->phy_addr);
+		reg = __raw_readl(dp->phy_addr);
+		reg |= dp->enable_mask;
+		__raw_writel(reg, dp->phy_addr);
+	}
 }
 
 static void exynos_dp_phy_exit(struct exynos_dp_device *dp)
 {
-	u32 reg;
-
-	reg = __raw_readl(dp->phy_addr);
-	reg &= ~(dp->enable_mask);
-	__raw_writel(reg, dp->phy_addr);
-}
-#else
-static struct exynos_dp_platdata *exynos_dp_dt_parse_pdata(struct device *dev)
-{
-	return NULL;
-}
-
-static int exynos_dp_dt_parse_phydata(struct exynos_dp_device *dp)
-{
-	return -EINVAL;
-}
-
-static void exynos_dp_phy_init(struct exynos_dp_device *dp)
-{
-	return;
-}
+	if (dp->phy_addr) {
+		u32 reg;
 
-static void exynos_dp_phy_exit(struct exynos_dp_device *dp)
-{
-	return;
+		reg = __raw_readl(dp->phy_addr);
+		reg &= ~(dp->enable_mask);
+		__raw_writel(reg, dp->phy_addr);
+	}
 }
-#endif /* CONFIG_OF */
 
 static int exynos_dp_probe(struct platform_device *pdev)
 {
 	struct resource *res;
 	struct exynos_dp_device *dp;
-	struct exynos_dp_platdata *pdata;
 
 	int ret = 0;
 
@@ -1057,21 +1028,13 @@ static int exynos_dp_probe(struct platform_device *pdev)
 
 	dp->dev = &pdev->dev;
 
-	if (pdev->dev.of_node) {
-		pdata = exynos_dp_dt_parse_pdata(&pdev->dev);
-		if (IS_ERR(pdata))
-			return PTR_ERR(pdata);
+	dp->video_info = exynos_dp_dt_parse_pdata(&pdev->dev);
+	if (IS_ERR(dp->video_info))
+		return PTR_ERR(dp->video_info);
 
-		ret = exynos_dp_dt_parse_phydata(dp);
-		if (ret)
-			return ret;
-	} else {
-		pdata = pdev->dev.platform_data;
-		if (!pdata) {
-			dev_err(&pdev->dev, "no platform data\n");
-			return -EINVAL;
-		}
-	}
+	ret = exynos_dp_dt_parse_phydata(dp);
+	if (ret)
+		return ret;
 
 	dp->clock = devm_clk_get(&pdev->dev, "dp");
 	if (IS_ERR(dp->clock)) {
@@ -1095,15 +1058,7 @@ static int exynos_dp_probe(struct platform_device *pdev)
 
 	INIT_WORK(&dp->hotplug_work, exynos_dp_hotplug);
 
-	dp->video_info = pdata->video_info;
-
-	if (pdev->dev.of_node) {
-		if (dp->phy_addr)
-			exynos_dp_phy_init(dp);
-	} else {
-		if (pdata->phy_init)
-			pdata->phy_init();
-	}
+	exynos_dp_phy_init(dp);
 
 	exynos_dp_init_dp(dp);
 
@@ -1121,18 +1076,11 @@ static int exynos_dp_probe(struct platform_device *pdev)
 
 static int exynos_dp_remove(struct platform_device *pdev)
 {
-	struct exynos_dp_platdata *pdata = pdev->dev.platform_data;
 	struct exynos_dp_device *dp = platform_get_drvdata(pdev);
 
 	flush_work(&dp->hotplug_work);
 
-	if (pdev->dev.of_node) {
-		if (dp->phy_addr)
-			exynos_dp_phy_exit(dp);
-	} else {
-		if (pdata->phy_exit)
-			pdata->phy_exit();
-	}
+	exynos_dp_phy_exit(dp);
 
 	clk_disable_unprepare(dp->clock);
 
@@ -1143,20 +1091,13 @@ static int exynos_dp_remove(struct platform_device *pdev)
 #ifdef CONFIG_PM_SLEEP
 static int exynos_dp_suspend(struct device *dev)
 {
-	struct exynos_dp_platdata *pdata = dev->platform_data;
 	struct exynos_dp_device *dp = dev_get_drvdata(dev);
 
 	disable_irq(dp->irq);
 
 	flush_work(&dp->hotplug_work);
 
-	if (dev->of_node) {
-		if (dp->phy_addr)
-			exynos_dp_phy_exit(dp);
-	} else {
-		if (pdata->phy_exit)
-			pdata->phy_exit();
-	}
+	exynos_dp_phy_exit(dp);
 
 	clk_disable_unprepare(dp->clock);
 
@@ -1165,16 +1106,9 @@ static int exynos_dp_suspend(struct device *dev)
 
 static int exynos_dp_resume(struct device *dev)
 {
-	struct exynos_dp_platdata *pdata = dev->platform_data;
 	struct exynos_dp_device *dp = dev_get_drvdata(dev);
 
-	if (dev->of_node) {
-		if (dp->phy_addr)
-			exynos_dp_phy_init(dp);
-	} else {
-		if (pdata->phy_init)
-			pdata->phy_init();
-	}
+	exynos_dp_phy_init(dp);
 
 	clk_prepare_enable(dp->clock);
 
@@ -1203,7 +1137,7 @@ static struct platform_driver exynos_dp_driver = {
 		.name	= "exynos-dp",
 		.owner	= THIS_MODULE,
 		.pm	= &exynos_dp_pm_ops,
-		.of_match_table = of_match_ptr(exynos_dp_match),
+		.of_match_table = exynos_dp_match,
 	},
 };
 
diff --git a/drivers/video/exynos/exynos_dp_core.h b/drivers/video/exynos/exynos_dp_core.h
index 6c567bbf..56cfec8 100644
--- a/drivers/video/exynos/exynos_dp_core.h
+++ b/drivers/video/exynos/exynos_dp_core.h
@@ -13,6 +13,99 @@
 #ifndef _EXYNOS_DP_CORE_H
 #define _EXYNOS_DP_CORE_H
 
+#define DP_TIMEOUT_LOOP_COUNT 100
+#define MAX_CR_LOOP 5
+#define MAX_EQ_LOOP 5
+
+enum link_rate_type {
+	LINK_RATE_1_62GBPS = 0x06,
+	LINK_RATE_2_70GBPS = 0x0a
+};
+
+enum link_lane_count_type {
+	LANE_COUNT1 = 1,
+	LANE_COUNT2 = 2,
+	LANE_COUNT4 = 4
+};
+
+enum link_training_state {
+	START,
+	CLOCK_RECOVERY,
+	EQUALIZER_TRAINING,
+	FINISHED,
+	FAILED
+};
+
+enum voltage_swing_level {
+	VOLTAGE_LEVEL_0,
+	VOLTAGE_LEVEL_1,
+	VOLTAGE_LEVEL_2,
+	VOLTAGE_LEVEL_3,
+};
+
+enum pre_emphasis_level {
+	PRE_EMPHASIS_LEVEL_0,
+	PRE_EMPHASIS_LEVEL_1,
+	PRE_EMPHASIS_LEVEL_2,
+	PRE_EMPHASIS_LEVEL_3,
+};
+
+enum pattern_set {
+	PRBS7,
+	D10_2,
+	TRAINING_PTN1,
+	TRAINING_PTN2,
+	DP_NONE
+};
+
+enum color_space {
+	COLOR_RGB,
+	COLOR_YCBCR422,
+	COLOR_YCBCR444
+};
+
+enum color_depth {
+	COLOR_6,
+	COLOR_8,
+	COLOR_10,
+	COLOR_12
+};
+
+enum color_coefficient {
+	COLOR_YCBCR601,
+	COLOR_YCBCR709
+};
+
+enum dynamic_range {
+	VESA,
+	CEA
+};
+
+enum pll_status {
+	PLL_UNLOCKED,
+	PLL_LOCKED
+};
+
+enum clock_recovery_m_value_type {
+	CALCULATED_M,
+	REGISTER_M
+};
+
+enum video_timing_recognition_type {
+	VIDEO_TIMING_FROM_CAPTURE,
+	VIDEO_TIMING_FROM_REGISTER
+};
+
+enum analog_power_block {
+	AUX_BLOCK,
+	CH0_BLOCK,
+	CH1_BLOCK,
+	CH2_BLOCK,
+	CH3_BLOCK,
+	ANALOG_TOTAL,
+	POWER_ALL
+};
+
 enum dp_irq_type {
 	DP_IRQ_TYPE_HP_CABLE_IN,
 	DP_IRQ_TYPE_HP_CABLE_OUT,
@@ -20,6 +113,22 @@ enum dp_irq_type {
 	DP_IRQ_TYPE_UNKNOWN,
 };
 
+struct video_info {
+	char *name;
+
+	bool h_sync_polarity;
+	bool v_sync_polarity;
+	bool interlaced;
+
+	enum color_space color_space;
+	enum dynamic_range dynamic_range;
+	enum color_coefficient ycbcr_coeff;
+	enum color_depth color_depth;
+
+	enum link_rate_type link_rate;
+	enum link_lane_count_type lane_count;
+};
+
 struct link_train {
 	int eq_loop;
 	int cr_loop[4];
diff --git a/drivers/video/exynos/exynos_dp_reg.c b/drivers/video/exynos/exynos_dp_reg.c
index 29d9d03..b70da50 100644
--- a/drivers/video/exynos/exynos_dp_reg.c
+++ b/drivers/video/exynos/exynos_dp_reg.c
@@ -14,8 +14,6 @@
 #include <linux/io.h>
 #include <linux/delay.h>
 
-#include <video/exynos_dp.h>
-
 #include "exynos_dp_core.h"
 #include "exynos_dp_reg.h"
 
diff --git a/include/video/exynos_dp.h b/include/video/exynos_dp.h
deleted file mode 100644
index bd8cabd..0000000
--- a/include/video/exynos_dp.h
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * Samsung SoC DP device support
- *
- * Copyright (C) 2012 Samsung Electronics Co., Ltd.
- * Author: Jingoo Han <jg1.han@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef _EXYNOS_DP_H
-#define _EXYNOS_DP_H
-
-#define DP_TIMEOUT_LOOP_COUNT 100
-#define MAX_CR_LOOP 5
-#define MAX_EQ_LOOP 5
-
-enum link_rate_type {
-	LINK_RATE_1_62GBPS = 0x06,
-	LINK_RATE_2_70GBPS = 0x0a
-};
-
-enum link_lane_count_type {
-	LANE_COUNT1 = 1,
-	LANE_COUNT2 = 2,
-	LANE_COUNT4 = 4
-};
-
-enum link_training_state {
-	START,
-	CLOCK_RECOVERY,
-	EQUALIZER_TRAINING,
-	FINISHED,
-	FAILED
-};
-
-enum voltage_swing_level {
-	VOLTAGE_LEVEL_0,
-	VOLTAGE_LEVEL_1,
-	VOLTAGE_LEVEL_2,
-	VOLTAGE_LEVEL_3,
-};
-
-enum pre_emphasis_level {
-	PRE_EMPHASIS_LEVEL_0,
-	PRE_EMPHASIS_LEVEL_1,
-	PRE_EMPHASIS_LEVEL_2,
-	PRE_EMPHASIS_LEVEL_3,
-};
-
-enum pattern_set {
-	PRBS7,
-	D10_2,
-	TRAINING_PTN1,
-	TRAINING_PTN2,
-	DP_NONE
-};
-
-enum color_space {
-	COLOR_RGB,
-	COLOR_YCBCR422,
-	COLOR_YCBCR444
-};
-
-enum color_depth {
-	COLOR_6,
-	COLOR_8,
-	COLOR_10,
-	COLOR_12
-};
-
-enum color_coefficient {
-	COLOR_YCBCR601,
-	COLOR_YCBCR709
-};
-
-enum dynamic_range {
-	VESA,
-	CEA
-};
-
-enum pll_status {
-	PLL_UNLOCKED,
-	PLL_LOCKED
-};
-
-enum clock_recovery_m_value_type {
-	CALCULATED_M,
-	REGISTER_M
-};
-
-enum video_timing_recognition_type {
-	VIDEO_TIMING_FROM_CAPTURE,
-	VIDEO_TIMING_FROM_REGISTER
-};
-
-enum analog_power_block {
-	AUX_BLOCK,
-	CH0_BLOCK,
-	CH1_BLOCK,
-	CH2_BLOCK,
-	CH3_BLOCK,
-	ANALOG_TOTAL,
-	POWER_ALL
-};
-
-struct video_info {
-	char *name;
-
-	bool h_sync_polarity;
-	bool v_sync_polarity;
-	bool interlaced;
-
-	enum color_space color_space;
-	enum dynamic_range dynamic_range;
-	enum color_coefficient ycbcr_coeff;
-	enum color_depth color_depth;
-
-	enum link_rate_type link_rate;
-	enum link_lane_count_type lane_count;
-};
-
-struct exynos_dp_platdata {
-	struct video_info *video_info;
-
-	void (*phy_init)(void);
-	void (*phy_exit)(void);
-};
-
-#endif /* _EXYNOS_DP_H */
-- 
1.7.10.4

[PATCH 3/3] video: exynos_dp: Use the generic PHY driver

[Jingoo Han]

Use the generic PHY API to control the DP PHY.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
---
 Documentation/devicetree/bindings/video/exynos_dp.txt |   17 +++++++++--------
 drivers/video/exynos/exynos_dp_core.c                 |   16 ++++++++++++----
 drivers/video/exynos/exynos_dp_core.h                 |    1 +
 3 files changed, 22 insertions(+), 12 deletions(-)

diff --git a/Documentation/devicetree/bindings/video/exynos_dp.txt b/Documentation/devicetree/bindings/video/exynos_dp.txt
index 84f10c1..3289d76 100644
--- a/Documentation/devicetree/bindings/video/exynos_dp.txt
+++ b/Documentation/devicetree/bindings/video/exynos_dp.txt
@@ -6,10 +6,10 @@ We use two nodes:
 	-dptx-phy node(defined inside dp-controller node)
 
 For the DP-PHY initialization, we use the dptx-phy node.
-Required properties for dptx-phy:
-	-reg:
+Required properties for dptx-phy: deprecated, use phys and phy-names
+	-reg: deprecated
 		Base address of DP PHY register.
-	-samsung,enable-mask:
+	-samsung,enable-mask: deprecated
 		The bit-mask used to enable/disable DP PHY.
 
 For the Panel initialization, we read data from dp-controller node.
@@ -27,6 +27,10 @@ Required properties for dp-controller:
 		from common clock binding: Shall be "dp".
 	-interrupt-parent:
 		phandle to Interrupt combiner node.
+	-phys:
+		from general PHY binding: the phandle for the PHY device.
+	-phy-names:
+		from general PHY binding: Should be "dp".
 	-samsung,color-space:
 		input video data format.
 			COLOR_RGB = 0, COLOR_YCBCR422 = 1, COLOR_YCBCR444 = 2
@@ -68,11 +72,8 @@ SOC specific portion:
 		clocks = <&clock 342>;
 		clock-names = "dp";
 
-		dptx-phy {
-			reg = <0x10040720>;
-			samsung,enable-mask = <1>;
-		};
-
+		phys = <&dp_phy>;
+		phy-names = "dp";
 	};
 
 Board Specific portion:
diff --git a/drivers/video/exynos/exynos_dp_core.c b/drivers/video/exynos/exynos_dp_core.c
index 05fed7d..5e1a715 100644
--- a/drivers/video/exynos/exynos_dp_core.c
+++ b/drivers/video/exynos/exynos_dp_core.c
@@ -19,6 +19,7 @@
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/of.h>
+#include <linux/phy/phy.h>
 
 #include "exynos_dp_core.h"
 
@@ -960,8 +961,11 @@ static int exynos_dp_dt_parse_phydata(struct exynos_dp_device *dp)
 
 	dp_phy_node = of_find_node_by_name(dp_phy_node, "dptx-phy");
 	if (!dp_phy_node) {
-		dev_err(dp->dev, "could not find dptx-phy node\n");
-		return -ENODEV;
+		dp->phy = devm_phy_get(dp->dev, "dp");
+		if (IS_ERR(dp->phy))
+			return PTR_ERR(dp->phy);
+		else
+			return 0;
 	}
 
 	if (of_property_read_u32(dp_phy_node, "reg", &phy_base)) {
@@ -992,7 +996,9 @@ err:
 
 static void exynos_dp_phy_init(struct exynos_dp_device *dp)
 {
-	if (dp->phy_addr) {
+	if (dp->phy) {
+		phy_power_on(dp->phy);
+	} else if (dp->phy_addr) {
 		u32 reg;
 
 		reg = __raw_readl(dp->phy_addr);
@@ -1003,7 +1009,9 @@ static void exynos_dp_phy_init(struct exynos_dp_device *dp)
 
 static void exynos_dp_phy_exit(struct exynos_dp_device *dp)
 {
-	if (dp->phy_addr) {
+	if (dp->phy) {
+		phy_power_off(dp->phy);
+	} else if (dp->phy_addr) {
 		u32 reg;
 
 		reg = __raw_readl(dp->phy_addr);
diff --git a/drivers/video/exynos/exynos_dp_core.h b/drivers/video/exynos/exynos_dp_core.h
index 56cfec8..607e36d 100644
--- a/drivers/video/exynos/exynos_dp_core.h
+++ b/drivers/video/exynos/exynos_dp_core.h
@@ -151,6 +151,7 @@ struct exynos_dp_device {
 	struct video_info	*video_info;
 	struct link_train	link_train;
 	struct work_struct	hotplug_work;
+	struct phy		*phy;
 };
 
 /* exynos_dp_reg.c */
-- 
1.7.10.4

Re: [PATCH V7 0/3] Generic PHY driver for the Exynos SoC DP PHY

[Kishon Vijay Abraham I]

On Monday 26 August 2013 02:25 PM, Jingoo Han wrote:
> This patch series adds a simple driver for the Samsung Exynos SoC
> series DP transmitter PHY, using the generic PHY framework [1].
> Previously the DP PHY used an internal DT node to control the PHY
> power enable bit.
> 
> These patches was tested on Exynos5250.
> 
> This PATCH v7 follows:
>  * PATCH v6, sent on July, 9th 2013
>  * PATCH v5, sent on July, 8th 2013
>  * PATCH v4, sent on July, 2nd 2013
>  * PATCH v3, sent on July, 1st 2013
>  * PATCH v2, sent on June, 28th 2013
>  * PATCH v1, sent on June, 28th 2013
> 
> Changes from v6:
>   * Re-based on git://git.kernel.org/pub/scm/linux/kernel/git/kishon/linux-phy.git
> 
> Changes from v5:
>   * Re-based on git://gitorious.org/linuxphy/linuxphy.git
> 
> Changes from v4:
>   * Marked original bindings as deprecated in 'exynos_dp.txt'
>   * Fixed typo of commit message.
>   * Added Tomasz Figa's Reviewed-by.
> 
> Changes from v3:
>   * Added OF dependancy.
>   * Removed redundant local variable 'void __iomem *addr'.
>   * Removed unnecessary dev_set_drvdata().
>   * Added a patch that remove non-DT support for Exynos
>     Display Port driver.
>   * Removed unnecessary 'struct exynos_dp_platdata'.
>   * Kept supporting the original bindings for DT compatibility.
> 
> Changes from v2:
>   * Removed redundant spinlock
>   * Removed 'struct phy' from 'struct exynos_dp_video_phy'
>   * Updated 'samsung-phy.txt', instead of creating
>     'samsung,exynos5250-dp-video-phy.txt'.
>   * Removed unnecessary additional specifier from 'phys'
>     DT property.
>   * Added 'phys', 'phy-names' properties to 'exynos_dp.txt' file.
>   * Added Felipe Balbi's Acked-by.
> 
> Changes from v1:
>   * Replaced exynos_dp_video_phy_xlate() with of_phy_simple_xlate(),
>     as Kishon Vijay Abraham I guided.
>   * Set the value of phy-cells as 0, because the phy_provider implements
>     only one PHY.
>   * Removed unnecessary header include.
>   * Added '#ifdef CONFIG_OF' and of_match_ptr macro.
> 
> This series depends on the generic PHY framework [1]. These patches
> refer to Sylwester Nawrocki's patches about Exynos MIPI [2].
> 
> [1] http://lwn.net/Articles/564188/
> [2] http://www.spinics.net/lists/linux-samsung-soc/msg20098.html
> 
> Jingoo Han (3):
>   phy: Add driver for Exynos DP PHY
>   video: exynos_dp: remove non-DT support for Exynos Display Port
>   video: exynos_dp: Use the generic PHY driver

FWIW,
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>