From 9b97383b789c1b2a8d4bc54d142a12f9d0a12aa1 Mon Sep 17 00:00:00 2001
From: Thierry Reding <treding@nvidia.com>
Date: Fri, 5 Dec 2014 11:46:56 +0100
Subject: drm/mipi-dsi: Avoid potential NULL pointer dereference

The mipi_dsi_packet_create() function dereferences the msg pointer
before checking that it's valid. Move the dereference down to where it
is required to avoid potentially dereferencing a NULL pointer.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/drm_mipi_dsi.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'drivers/gpu/drm')

diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index c0644bb865f..2d5ca8eec13 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -323,8 +323,6 @@ EXPORT_SYMBOL(mipi_dsi_packet_format_is_long);
 int mipi_dsi_create_packet(struct mipi_dsi_packet *packet,
 			   const struct mipi_dsi_msg *msg)
 {
-	const u8 *tx = msg->tx_buf;
-
 	if (!packet || !msg)
 		return -EINVAL;
 
@@ -353,8 +351,10 @@ int mipi_dsi_create_packet(struct mipi_dsi_packet *packet,
 		packet->header[2] = (msg->tx_len >> 8) & 0xff;
 
 		packet->payload_length = msg->tx_len;
-		packet->payload = tx;
+		packet->payload = msg->tx_buf;
 	} else {
+		const u8 *tx = msg->tx_buf;
+
 		packet->header[1] = (msg->tx_len > 0) ? tx[0] : 0;
 		packet->header[2] = (msg->tx_len > 1) ? tx[1] : 0;
 	}
-- 
cgit v1.2.3-70-g09d2


From d435a2af12349e6285559196675ad45f1e4a041d Mon Sep 17 00:00:00 2001
From: Philipp Zabel <philipp.zabel@gmail.com>
Date: Wed, 19 Nov 2014 10:29:55 +0100
Subject: drm/panel: simple: Add support for Giantplus GPG482739QS5

This patch adds support for the GiantPlus GPG48273QS5 4.3" WQVGA TFT LCD
panel to the simple-panel driver.

This panel is connected via a parallel bus and uses both HSYNC and
VSYNC, whose lengths are unfortunately not clearly defined. The
datasheet only specifies the front- and backporch length, but the timing
diagram suggests that both sync signals should be asserted for exactly
one clock cycle.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 .../bindings/panel/giantplus,gpg482739qs5.txt      |  7 ++++++
 drivers/gpu/drm/panel/panel-simple.c               | 26 ++++++++++++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/panel/giantplus,gpg482739qs5.txt

(limited to 'drivers/gpu/drm')

diff --git a/Documentation/devicetree/bindings/panel/giantplus,gpg482739qs5.txt b/Documentation/devicetree/bindings/panel/giantplus,gpg482739qs5.txt
new file mode 100644
index 00000000000..24b0b624434
--- /dev/null
+++ b/Documentation/devicetree/bindings/panel/giantplus,gpg482739qs5.txt
@@ -0,0 +1,7 @@
+GiantPlus GPG48273QS5 4.3" (480x272) WQVGA TFT LCD panel
+
+Required properties:
+- compatible: should be "giantplus,gpg48273qs5"
+
+This binding is compatible with the simple-panel binding, which is specified
+in simple-panel.txt in this directory.
diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 6049d245c20..787983c3603 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -566,6 +566,29 @@ static const struct panel_desc foxlink_fl500wvr00_a0t = {
 	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
 };
 
+static const struct drm_display_mode giantplus_gpg482739qs5_mode = {
+	.clock = 9000,
+	.hdisplay = 480,
+	.hsync_start = 480 + 5,
+	.hsync_end = 480 + 5 + 1,
+	.htotal = 480 + 5 + 1 + 40,
+	.vdisplay = 272,
+	.vsync_start = 272 + 8,
+	.vsync_end = 272 + 8 + 1,
+	.vtotal = 272 + 8 + 1 + 8,
+	.vrefresh = 60,
+};
+
+static const struct panel_desc giantplus_gpg482739qs5 = {
+	.modes = &giantplus_gpg482739qs5_mode,
+	.num_modes = 1,
+	.bpc = 8,
+	.size = {
+		.width = 95,
+		.height = 54,
+	},
+};
+
 static const struct drm_display_mode hannstar_hsd070pww1_mode = {
 	.clock = 71100,
 	.hdisplay = 1280,
@@ -762,6 +785,9 @@ static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "foxlink,fl500wvr00-a0t",
 		.data = &foxlink_fl500wvr00_a0t,
+	}, {
+		.compatible = "giantplus,gpg482739qs5",
+		.data = &giantplus_gpg482739qs5
 	}, {
 		.compatible = "hannstar,hsd070pww1",
 		.data = &hannstar_hsd070pww1,
-- 
cgit v1.2.3-70-g09d2


From 4569619d0f3a38c41a4556c79ef63cabd4282558 Mon Sep 17 00:00:00 2001
From: Thierry Reding <treding@nvidia.com>
Date: Mon, 8 Dec 2014 15:05:48 +0100
Subject: drm/panel: sharp: lq101r1sx01: Add delay after display on

After switching the display on (using the DCS display_on command), wait
for 6 frames (100ms at 60 Hz) to give the display more time to prepare.
Failing to do this results in the panel not initializing properly in a
large number of cases.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'drivers/gpu/drm')

diff --git a/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c b/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
index 9d81759d82f..8a11e83ab58 100644
--- a/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
+++ b/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
@@ -41,6 +41,16 @@ static inline struct sharp_panel *to_sharp_panel(struct drm_panel *panel)
 	return container_of(panel, struct sharp_panel, base);
 }
 
+static void sharp_wait_frames(struct sharp_panel *sharp, unsigned int frames)
+{
+	unsigned int refresh = drm_mode_vrefresh(sharp->mode);
+
+	if (WARN_ON(frames > refresh))
+		return;
+
+	msleep(1000 / (refresh / frames));
+}
+
 static int sharp_panel_write(struct sharp_panel *sharp, u16 offset, u8 value)
 {
 	u8 payload[3] = { offset >> 8, offset & 0xff, value };
@@ -238,6 +248,9 @@ static int sharp_panel_prepare(struct drm_panel *panel)
 
 	sharp->prepared = true;
 
+	/* wait for 6 frames before continuing */
+	sharp_wait_frames(sharp, 6);
+
 	return 0;
 
 poweroff:
-- 
cgit v1.2.3-70-g09d2


From ee920bca27da6c33de6ee73de7b34dee0298f703 Mon Sep 17 00:00:00 2001
From: Thierry Reding <treding@nvidia.com>
Date: Mon, 8 Dec 2014 15:38:17 +0100
Subject: drm/panel: sharp: lq101r1sx01: Respect power timings

Before shutting down the display using the DCS display_off command, wait
for 4 frames according to the datasheet.

Furthermore, after enabling the power supply, the supply voltage needs
around 10 ms to settle. After that, another 120 ms is required before a
DCS exit_sleep_mode command can be sent.

While at it, no longer send the DCS soft_reset command. This is totally
unnecessary because we've just powered up the display, hence it will be
in a reset state already.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

(limited to 'drivers/gpu/drm')

diff --git a/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c b/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
index 8a11e83ab58..745ceb1ef36 100644
--- a/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
+++ b/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
@@ -116,6 +116,8 @@ static int sharp_panel_unprepare(struct drm_panel *panel)
 	if (!sharp->prepared)
 		return 0;
 
+	sharp_wait_frames(sharp, 4);
+
 	err = mipi_dsi_dcs_set_display_off(sharp->link1);
 	if (err < 0)
 		dev_err(panel->dev, "failed to set display off: %d\n", err);
@@ -180,15 +182,13 @@ static int sharp_panel_prepare(struct drm_panel *panel)
 	if (err < 0)
 		return err;
 
-	usleep_range(10000, 20000);
-
-	err = mipi_dsi_dcs_soft_reset(sharp->link1);
-	if (err < 0) {
-		dev_err(panel->dev, "soft reset failed: %d\n", err);
-		goto poweroff;
-	}
-
-	msleep(120);
+	/*
+	 * According to the datasheet, the panel needs around 10 ms to fully
+	 * power up. At least another 120 ms is required before exiting sleep
+	 * mode to make sure the panel is ready. Throw in another 20 ms for
+	 * good measure.
+	 */
+	msleep(150);
 
 	err = mipi_dsi_dcs_exit_sleep_mode(sharp->link1);
 	if (err < 0) {
-- 
cgit v1.2.3-70-g09d2


From d6e8d3bc34358c9b5c81786f6ac5c1ab96a62de6 Mon Sep 17 00:00:00 2001
From: Thierry Reding <treding@nvidia.com>
Date: Thu, 18 Dec 2014 17:11:47 +0100
Subject: drm/panel: sharp: lq101r1sx01: Remove unneeded include

Nothing in the file needs symbols from include/linux/host1x.h, so remove
the include.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c | 2 --
 1 file changed, 2 deletions(-)

(limited to 'drivers/gpu/drm')

diff --git a/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c b/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
index 745ceb1ef36..3cce3ca1960 100644
--- a/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
+++ b/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
@@ -19,8 +19,6 @@
 
 #include <video/mipi_display.h>
 
-#include <linux/host1x.h>
-
 struct sharp_panel {
 	struct drm_panel base;
 	/* the datasheet refers to them as DSI-LINK1 and DSI-LINK2 */
-- 
cgit v1.2.3-70-g09d2


From d47df63393ed81977e0f6435988d9cbd70c867f7 Mon Sep 17 00:00:00 2001
From: Philipp Zabel <p.zabel@pengutronix.de>
Date: Thu, 18 Dec 2014 16:43:43 +0100
Subject: drm/panel: simple: Add AVIC TM070DDH03 panel support

The Shanghai AVIC Optoelectronics TM070DDH03 is a 7" 1024x600 TFT LCD
panel connecting to a 24-bit RGB LVDS interface.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 .../devicetree/bindings/panel/avic,tm070ddh03.txt  |  7 +++++
 drivers/gpu/drm/panel/panel-simple.c               | 31 ++++++++++++++++++++++
 2 files changed, 38 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/panel/avic,tm070ddh03.txt

(limited to 'drivers/gpu/drm')

diff --git a/Documentation/devicetree/bindings/panel/avic,tm070ddh03.txt b/Documentation/devicetree/bindings/panel/avic,tm070ddh03.txt
new file mode 100644
index 00000000000..b6f2f3e8f44
--- /dev/null
+++ b/Documentation/devicetree/bindings/panel/avic,tm070ddh03.txt
@@ -0,0 +1,7 @@
+Shanghai AVIC Optoelectronics 7" 1024x600 color TFT-LCD panel
+
+Required properties:
+- compatible: should be "avic,tm070ddh03"
+
+This binding is compatible with the simple-panel binding, which is specified
+in simple-panel.txt in this directory.
diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 787983c3603..39806c33533 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -448,6 +448,34 @@ static const struct panel_desc auo_b133htn01 = {
 	},
 };
 
+static const struct drm_display_mode avic_tm070ddh03_mode = {
+	.clock = 51200,
+	.hdisplay = 1024,
+	.hsync_start = 1024 + 160,
+	.hsync_end = 1024 + 160 + 4,
+	.htotal = 1024 + 160 + 4 + 156,
+	.vdisplay = 600,
+	.vsync_start = 600 + 17,
+	.vsync_end = 600 + 17 + 1,
+	.vtotal = 600 + 17 + 1 + 17,
+	.vrefresh = 60,
+};
+
+static const struct panel_desc avic_tm070ddh03 = {
+	.modes = &avic_tm070ddh03_mode,
+	.num_modes = 1,
+	.bpc = 8,
+	.size = {
+		.width = 154,
+		.height = 90,
+	},
+	.delay = {
+		.prepare = 20,
+		.enable = 200,
+		.disable = 200,
+	},
+};
+
 static const struct drm_display_mode chunghwa_claa101wa01a_mode = {
 	.clock = 72070,
 	.hdisplay = 1366,
@@ -767,6 +795,9 @@ static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "auo,b133xtn01",
 		.data = &auo_b133xtn01,
+	}, {
+		.compatible = "avic,tm070ddh03",
+		.data = &avic_tm070ddh03,
 	}, {
 		.compatible = "chunghwa,claa101wa01a",
 		.data = &chunghwa_claa101wa01a
-- 
cgit v1.2.3-70-g09d2


From 94d50d57c4403aac70d23d2f442ab9ef4a668791 Mon Sep 17 00:00:00 2001
From: Ajay Kumar <ajaykumar.rs@samsung.com>
Date: Tue, 20 Jan 2015 22:08:42 +0530
Subject: drm/bridge: ptn3460: Few trivial cleanups

This patch does the following changes:
	-- Use usleep_range instead of udelay.
	-- Remove driver_private member from ptn3460 structure.
	-- Make all possible functions and structures static.
	-- Use dev_err for non-DRM errors.
	-- Arrange header files alphabetically.
	-- s/edid/EDID in all error messages.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Tested-by: Rahul Sharma <rahul.sharma@samsung.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Tested-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/bridge/ptn3460.c | 95 ++++++++++++++++++++--------------------
 1 file changed, 48 insertions(+), 47 deletions(-)

(limited to 'drivers/gpu/drm')

diff --git a/drivers/gpu/drm/bridge/ptn3460.c b/drivers/gpu/drm/bridge/ptn3460.c
index d466696ed5e..4db38e1f7a1 100644
--- a/drivers/gpu/drm/bridge/ptn3460.c
+++ b/drivers/gpu/drm/bridge/ptn3460.c
@@ -13,19 +13,19 @@
  * GNU General Public License for more details.
  */
 
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
-#include <linux/i2c.h>
-#include <linux/gpio.h>
-#include <linux/delay.h>
 
-#include "drmP.h"
-#include "drm_edid.h"
+#include "bridge/ptn3460.h"
+
 #include "drm_crtc.h"
 #include "drm_crtc_helper.h"
-
-#include "bridge/ptn3460.h"
+#include "drm_edid.h"
+#include "drmP.h"
 
 #define PTN3460_EDID_ADDR			0x0
 #define PTN3460_EDID_EMULATION_ADDR		0x84
@@ -37,7 +37,7 @@ struct ptn3460_bridge {
 	struct drm_connector connector;
 	struct i2c_client *client;
 	struct drm_encoder *encoder;
-	struct drm_bridge *bridge;
+	struct drm_bridge bridge;
 	struct edid *edid;
 	int gpio_pd_n;
 	int gpio_rst_n;
@@ -45,6 +45,18 @@ struct ptn3460_bridge {
 	bool enabled;
 };
 
+static inline struct ptn3460_bridge *
+		bridge_to_ptn3460(struct drm_bridge *bridge)
+{
+	return container_of(bridge, struct ptn3460_bridge, bridge);
+}
+
+static inline struct ptn3460_bridge *
+		connector_to_ptn3460(struct drm_connector *connector)
+{
+	return container_of(connector, struct ptn3460_bridge, connector);
+}
+
 static int ptn3460_read_bytes(struct ptn3460_bridge *ptn_bridge, char addr,
 		u8 *buf, int len)
 {
@@ -92,7 +104,7 @@ static int ptn3460_select_edid(struct ptn3460_bridge *ptn_bridge)
 	ret = ptn3460_write_byte(ptn_bridge, PTN3460_EDID_SRAM_LOAD_ADDR,
 			ptn_bridge->edid_emulation);
 	if (ret) {
-		DRM_ERROR("Failed to transfer edid to sram, ret=%d\n", ret);
+		DRM_ERROR("Failed to transfer EDID to sram, ret=%d\n", ret);
 		return ret;
 	}
 
@@ -102,7 +114,7 @@ static int ptn3460_select_edid(struct ptn3460_bridge *ptn_bridge)
 
 	ret = ptn3460_write_byte(ptn_bridge, PTN3460_EDID_EMULATION_ADDR, val);
 	if (ret) {
-		DRM_ERROR("Failed to write edid value, ret=%d\n", ret);
+		DRM_ERROR("Failed to write EDID value, ret=%d\n", ret);
 		return ret;
 	}
 
@@ -111,7 +123,7 @@ static int ptn3460_select_edid(struct ptn3460_bridge *ptn_bridge)
 
 static void ptn3460_pre_enable(struct drm_bridge *bridge)
 {
-	struct ptn3460_bridge *ptn_bridge = bridge->driver_private;
+	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
 	int ret;
 
 	if (ptn_bridge->enabled)
@@ -122,7 +134,7 @@ static void ptn3460_pre_enable(struct drm_bridge *bridge)
 
 	if (gpio_is_valid(ptn_bridge->gpio_rst_n)) {
 		gpio_set_value(ptn_bridge->gpio_rst_n, 0);
-		udelay(10);
+		usleep_range(10, 20);
 		gpio_set_value(ptn_bridge->gpio_rst_n, 1);
 	}
 
@@ -135,7 +147,7 @@ static void ptn3460_pre_enable(struct drm_bridge *bridge)
 
 	ret = ptn3460_select_edid(ptn_bridge);
 	if (ret)
-		DRM_ERROR("Select edid failed ret=%d\n", ret);
+		DRM_ERROR("Select EDID failed ret=%d\n", ret);
 
 	ptn_bridge->enabled = true;
 }
@@ -146,7 +158,7 @@ static void ptn3460_enable(struct drm_bridge *bridge)
 
 static void ptn3460_disable(struct drm_bridge *bridge)
 {
-	struct ptn3460_bridge *ptn_bridge = bridge->driver_private;
+	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
 
 	if (!ptn_bridge->enabled)
 		return;
@@ -164,9 +176,9 @@ static void ptn3460_post_disable(struct drm_bridge *bridge)
 {
 }
 
-void ptn3460_bridge_destroy(struct drm_bridge *bridge)
+static void ptn3460_bridge_destroy(struct drm_bridge *bridge)
 {
-	struct ptn3460_bridge *ptn_bridge = bridge->driver_private;
+	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
 
 	drm_bridge_cleanup(bridge);
 	if (gpio_is_valid(ptn_bridge->gpio_pd_n))
@@ -176,7 +188,7 @@ void ptn3460_bridge_destroy(struct drm_bridge *bridge)
 	/* Nothing else to free, we've got devm allocated memory */
 }
 
-struct drm_bridge_funcs ptn3460_bridge_funcs = {
+static struct drm_bridge_funcs ptn3460_bridge_funcs = {
 	.pre_enable = ptn3460_pre_enable,
 	.enable = ptn3460_enable,
 	.disable = ptn3460_disable,
@@ -184,24 +196,24 @@ struct drm_bridge_funcs ptn3460_bridge_funcs = {
 	.destroy = ptn3460_bridge_destroy,
 };
 
-int ptn3460_get_modes(struct drm_connector *connector)
+static int ptn3460_get_modes(struct drm_connector *connector)
 {
 	struct ptn3460_bridge *ptn_bridge;
 	u8 *edid;
-	int ret, num_modes;
+	int ret, num_modes = 0;
 	bool power_off;
 
-	ptn_bridge = container_of(connector, struct ptn3460_bridge, connector);
+	ptn_bridge = connector_to_ptn3460(connector);
 
 	if (ptn_bridge->edid)
 		return drm_add_edid_modes(connector, ptn_bridge->edid);
 
 	power_off = !ptn_bridge->enabled;
-	ptn3460_pre_enable(ptn_bridge->bridge);
+	ptn3460_pre_enable(&ptn_bridge->bridge);
 
 	edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
 	if (!edid) {
-		DRM_ERROR("Failed to allocate edid\n");
+		DRM_ERROR("Failed to allocate EDID\n");
 		return 0;
 	}
 
@@ -209,7 +221,6 @@ int ptn3460_get_modes(struct drm_connector *connector)
 			EDID_LENGTH);
 	if (ret) {
 		kfree(edid);
-		num_modes = 0;
 		goto out;
 	}
 
@@ -220,37 +231,35 @@ int ptn3460_get_modes(struct drm_connector *connector)
 
 out:
 	if (power_off)
-		ptn3460_disable(ptn_bridge->bridge);
+		ptn3460_disable(&ptn_bridge->bridge);
 
 	return num_modes;
 }
 
-struct drm_encoder *ptn3460_best_encoder(struct drm_connector *connector)
+static struct drm_encoder *ptn3460_best_encoder(struct drm_connector *connector)
 {
-	struct ptn3460_bridge *ptn_bridge;
-
-	ptn_bridge = container_of(connector, struct ptn3460_bridge, connector);
+	struct ptn3460_bridge *ptn_bridge = connector_to_ptn3460(connector);
 
 	return ptn_bridge->encoder;
 }
 
-struct drm_connector_helper_funcs ptn3460_connector_helper_funcs = {
+static struct drm_connector_helper_funcs ptn3460_connector_helper_funcs = {
 	.get_modes = ptn3460_get_modes,
 	.best_encoder = ptn3460_best_encoder,
 };
 
-enum drm_connector_status ptn3460_detect(struct drm_connector *connector,
+static enum drm_connector_status ptn3460_detect(struct drm_connector *connector,
 		bool force)
 {
 	return connector_status_connected;
 }
 
-void ptn3460_connector_destroy(struct drm_connector *connector)
+static void ptn3460_connector_destroy(struct drm_connector *connector)
 {
 	drm_connector_cleanup(connector);
 }
 
-struct drm_connector_funcs ptn3460_connector_funcs = {
+static struct drm_connector_funcs ptn3460_connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.detect = ptn3460_detect,
@@ -261,30 +270,22 @@ int ptn3460_init(struct drm_device *dev, struct drm_encoder *encoder,
 		struct i2c_client *client, struct device_node *node)
 {
 	int ret;
-	struct drm_bridge *bridge;
 	struct ptn3460_bridge *ptn_bridge;
 
-	bridge = devm_kzalloc(dev->dev, sizeof(*bridge), GFP_KERNEL);
-	if (!bridge) {
-		DRM_ERROR("Failed to allocate drm bridge\n");
-		return -ENOMEM;
-	}
-
 	ptn_bridge = devm_kzalloc(dev->dev, sizeof(*ptn_bridge), GFP_KERNEL);
 	if (!ptn_bridge) {
-		DRM_ERROR("Failed to allocate ptn bridge\n");
 		return -ENOMEM;
 	}
 
 	ptn_bridge->client = client;
 	ptn_bridge->encoder = encoder;
-	ptn_bridge->bridge = bridge;
 	ptn_bridge->gpio_pd_n = of_get_named_gpio(node, "powerdown-gpio", 0);
 	if (gpio_is_valid(ptn_bridge->gpio_pd_n)) {
 		ret = gpio_request_one(ptn_bridge->gpio_pd_n,
 				GPIOF_OUT_INIT_HIGH, "PTN3460_PD_N");
 		if (ret) {
-			DRM_ERROR("Request powerdown-gpio failed (%d)\n", ret);
+			dev_err(&client->dev,
+				"Request powerdown-gpio failed (%d)\n", ret);
 			return ret;
 		}
 	}
@@ -298,7 +299,8 @@ int ptn3460_init(struct drm_device *dev, struct drm_encoder *encoder,
 		ret = gpio_request_one(ptn_bridge->gpio_rst_n,
 				GPIOF_OUT_INIT_LOW, "PTN3460_RST_N");
 		if (ret) {
-			DRM_ERROR("Request reset-gpio failed (%d)\n", ret);
+			dev_err(&client->dev,
+				"Request reset-gpio failed (%d)\n", ret);
 			gpio_free(ptn_bridge->gpio_pd_n);
 			return ret;
 		}
@@ -307,18 +309,17 @@ int ptn3460_init(struct drm_device *dev, struct drm_encoder *encoder,
 	ret = of_property_read_u32(node, "edid-emulation",
 			&ptn_bridge->edid_emulation);
 	if (ret) {
-		DRM_ERROR("Can't read edid emulation value\n");
+		dev_err(&client->dev, "Can't read EDID emulation value\n");
 		goto err;
 	}
 
-	ret = drm_bridge_init(dev, bridge, &ptn3460_bridge_funcs);
+	ret = drm_bridge_init(dev, &ptn_bridge->bridge, &ptn3460_bridge_funcs);
 	if (ret) {
 		DRM_ERROR("Failed to initialize bridge with drm\n");
 		goto err;
 	}
 
-	bridge->driver_private = ptn_bridge;
-	encoder->bridge = bridge;
+	encoder->bridge = &ptn_bridge->bridge;
 
 	ret = drm_connector_init(dev, &ptn_bridge->connector,
 			&ptn3460_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
-- 
cgit v1.2.3-70-g09d2


From b07b90fd178a4797b0454ead491b717b41046bee Mon Sep 17 00:00:00 2001
From: Ajay Kumar <ajaykumar.rs@samsung.com>
Date: Tue, 20 Jan 2015 22:08:43 +0530
Subject: drm/bridge: do not pass drm_bridge_funcs to drm_bridge_init

Assign the pointer to bridge ops structure(drm_bridge_funcs) in
the bridge driver itself, instead of passing it to drm_bridge_init.

This will allow bridge driver developer to pack bridge private
information inside the bridge object and pass only the drm-relevant
information to drm_bridge_init.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Tested-by: Rahul Sharma <rahul.sharma@samsung.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Tested-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/bridge/ptn3460.c       | 3 ++-
 drivers/gpu/drm/drm_crtc.c             | 5 +----
 drivers/gpu/drm/msm/hdmi/hdmi_bridge.c | 3 ++-
 drivers/gpu/drm/sti/sti_hda.c          | 3 ++-
 drivers/gpu/drm/sti/sti_hdmi.c         | 3 ++-
 include/drm/drm_crtc.h                 | 3 +--
 6 files changed, 10 insertions(+), 10 deletions(-)

(limited to 'drivers/gpu/drm')

diff --git a/drivers/gpu/drm/bridge/ptn3460.c b/drivers/gpu/drm/bridge/ptn3460.c
index 4db38e1f7a1..a2ddc8d73c6 100644
--- a/drivers/gpu/drm/bridge/ptn3460.c
+++ b/drivers/gpu/drm/bridge/ptn3460.c
@@ -313,7 +313,8 @@ int ptn3460_init(struct drm_device *dev, struct drm_encoder *encoder,
 		goto err;
 	}
 
-	ret = drm_bridge_init(dev, &ptn_bridge->bridge, &ptn3460_bridge_funcs);
+	ptn_bridge->bridge.funcs = &ptn3460_bridge_funcs;
+	ret = drm_bridge_init(dev, &ptn_bridge->bridge);
 	if (ret) {
 		DRM_ERROR("Failed to initialize bridge with drm\n");
 		goto err;
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index b459888f631..7936c5c2314 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -1069,7 +1069,6 @@ EXPORT_SYMBOL(drm_connector_unplug_all);
  * drm_bridge_init - initialize a drm transcoder/bridge
  * @dev: drm device
  * @bridge: transcoder/bridge to set up
- * @funcs: bridge function table
  *
  * Initialises a preallocated bridge. Bridges should be
  * subclassed as part of driver connector objects.
@@ -1077,8 +1076,7 @@ EXPORT_SYMBOL(drm_connector_unplug_all);
  * Returns:
  * Zero on success, error code on failure.
  */
-int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge,
-		const struct drm_bridge_funcs *funcs)
+int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge)
 {
 	int ret;
 
@@ -1089,7 +1087,6 @@ int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge,
 		goto out;
 
 	bridge->dev = dev;
-	bridge->funcs = funcs;
 
 	list_add_tail(&bridge->head, &dev->mode_config.bridge_list);
 	dev->mode_config.num_bridge++;
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
index 6902ad6da71..52ed2b53b24 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
@@ -220,8 +220,9 @@ struct drm_bridge *hdmi_bridge_init(struct hdmi *hdmi)
 	hdmi_bridge->hdmi = hdmi;
 
 	bridge = &hdmi_bridge->base;
+	bridge->funcs = &hdmi_bridge_funcs;
 
-	drm_bridge_init(hdmi->dev, bridge, &hdmi_bridge_funcs);
+	drm_bridge_init(hdmi->dev, bridge);
 
 	return bridge;
 
diff --git a/drivers/gpu/drm/sti/sti_hda.c b/drivers/gpu/drm/sti/sti_hda.c
index 2ae9a9b7366..6cf145de9b4 100644
--- a/drivers/gpu/drm/sti/sti_hda.c
+++ b/drivers/gpu/drm/sti/sti_hda.c
@@ -664,7 +664,8 @@ static int sti_hda_bind(struct device *dev, struct device *master, void *data)
 		return -ENOMEM;
 
 	bridge->driver_private = hda;
-	drm_bridge_init(drm_dev, bridge, &sti_hda_bridge_funcs);
+	bridge->funcs = &sti_hda_bridge_funcs;
+	drm_bridge_init(drm_dev, bridge);
 
 	encoder->bridge = bridge;
 	connector->encoder = encoder;
diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c
index d032e024b0b..74e943e655d 100644
--- a/drivers/gpu/drm/sti/sti_hdmi.c
+++ b/drivers/gpu/drm/sti/sti_hdmi.c
@@ -635,7 +635,8 @@ static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
 		goto err_adapt;
 
 	bridge->driver_private = hdmi;
-	drm_bridge_init(drm_dev, bridge, &sti_hdmi_bridge_funcs);
+	bridge->funcs = &sti_hdmi_bridge_funcs;
+	drm_bridge_init(drm_dev, bridge);
 
 	encoder->bridge = bridge;
 	connector->encoder = encoder;
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 02614170c03..15bb762fb31 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -1222,8 +1222,7 @@ extern unsigned int drm_connector_index(struct drm_connector *connector);
 /* helper to unplug all connectors from sysfs for device */
 extern void drm_connector_unplug_all(struct drm_device *dev);
 
-extern int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge,
-			   const struct drm_bridge_funcs *funcs);
+extern int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge);
 extern void drm_bridge_cleanup(struct drm_bridge *bridge);
 
 extern int drm_encoder_init(struct drm_device *dev,
-- 
cgit v1.2.3-70-g09d2


From 3d3f8b1f8b62c3a010976269df454baa9246fc65 Mon Sep 17 00:00:00 2001
From: Ajay Kumar <ajaykumar.rs@samsung.com>
Date: Tue, 20 Jan 2015 22:08:44 +0530
Subject: drm/bridge: make bridge registration independent of drm flow

Currently, third party bridge drivers(ptn3460) are dependent
on the corresponding encoder driver init, since bridge driver
needs a drm_device pointer to finish drm initializations.
The encoder driver passes the drm_device pointer to the
bridge driver. Because of this dependency, third party drivers
like ptn3460 doesn't adhere to the driver model.

In this patch, we reframe the bridge registration framework
so that bridge initialization is split into 2 steps, and
bridge registration happens independent of drm flow:
--Step 1: gather all the bridge settings independent of drm and
	  add the bridge onto a global list of bridges.
--Step 2: when the encoder driver is probed, call drm_bridge_attach
	  for the corresponding bridge so that the bridge receives
	  drm_device pointer and continues with connector and other
	  drm initializations.

The old set of bridge helpers are removed, and a set of new helpers
are added to accomplish the 2 step initialization.

The bridge devices register themselves onto global list of bridges
when they get probed by calling "drm_bridge_add".

The parent encoder driver waits till the bridge is available
in the lookup table(by calling "of_drm_find_bridge") and then
continues with its initialization.

The encoder driver should also call "drm_bridge_attach" to pass
on the drm_device to the bridge object.

drm_bridge_attach inturn calls "bridge->funcs->attach" so that
bridge can continue with drm related initializations.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Tested-by: Rahul Sharma <rahul.sharma@samsung.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Tested-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/Makefile               |  2 +-
 drivers/gpu/drm/bridge/ptn3460.c       | 27 +++++-----
 drivers/gpu/drm/drm_bridge.c           | 91 ++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/drm_crtc.c             | 67 -------------------------
 drivers/gpu/drm/msm/hdmi/hdmi.c        |  4 +-
 drivers/gpu/drm/msm/hdmi/hdmi.h        |  1 +
 drivers/gpu/drm/msm/hdmi/hdmi_bridge.c |  6 +--
 drivers/gpu/drm/sti/sti_hda.c          | 10 +---
 drivers/gpu/drm/sti/sti_hdmi.c         | 10 +---
 include/drm/bridge/ptn3460.h           |  8 +++
 include/drm/drm_crtc.h                 | 26 +++++-----
 11 files changed, 133 insertions(+), 119 deletions(-)
 create mode 100644 drivers/gpu/drm/drm_bridge.c

(limited to 'drivers/gpu/drm')

diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index cf0eed8208b..2c239b99de6 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -14,7 +14,7 @@ drm-y       :=	drm_auth.o drm_bufs.o drm_cache.o \
 		drm_info.o drm_debugfs.o drm_encoder_slave.o \
 		drm_trace_points.o drm_global.o drm_prime.o \
 		drm_rect.o drm_vma_manager.o drm_flip_work.o \
-		drm_modeset_lock.o drm_atomic.o
+		drm_modeset_lock.o drm_atomic.o drm_bridge.o
 
 drm-$(CONFIG_COMPAT) += drm_ioc32.o
 drm-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_gem_cma_helper.o
diff --git a/drivers/gpu/drm/bridge/ptn3460.c b/drivers/gpu/drm/bridge/ptn3460.c
index a2ddc8d73c6..4a818c1b62e 100644
--- a/drivers/gpu/drm/bridge/ptn3460.c
+++ b/drivers/gpu/drm/bridge/ptn3460.c
@@ -176,24 +176,11 @@ static void ptn3460_post_disable(struct drm_bridge *bridge)
 {
 }
 
-static void ptn3460_bridge_destroy(struct drm_bridge *bridge)
-{
-	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
-
-	drm_bridge_cleanup(bridge);
-	if (gpio_is_valid(ptn_bridge->gpio_pd_n))
-		gpio_free(ptn_bridge->gpio_pd_n);
-	if (gpio_is_valid(ptn_bridge->gpio_rst_n))
-		gpio_free(ptn_bridge->gpio_rst_n);
-	/* Nothing else to free, we've got devm allocated memory */
-}
-
 static struct drm_bridge_funcs ptn3460_bridge_funcs = {
 	.pre_enable = ptn3460_pre_enable,
 	.enable = ptn3460_enable,
 	.disable = ptn3460_disable,
 	.post_disable = ptn3460_post_disable,
-	.destroy = ptn3460_bridge_destroy,
 };
 
 static int ptn3460_get_modes(struct drm_connector *connector)
@@ -314,7 +301,7 @@ int ptn3460_init(struct drm_device *dev, struct drm_encoder *encoder,
 	}
 
 	ptn_bridge->bridge.funcs = &ptn3460_bridge_funcs;
-	ret = drm_bridge_init(dev, &ptn_bridge->bridge);
+	ret = drm_bridge_attach(dev, &ptn_bridge->bridge);
 	if (ret) {
 		DRM_ERROR("Failed to initialize bridge with drm\n");
 		goto err;
@@ -343,3 +330,15 @@ err:
 	return ret;
 }
 EXPORT_SYMBOL(ptn3460_init);
+
+void ptn3460_destroy(struct drm_bridge *bridge)
+{
+	struct ptn3460_bridge *ptn_bridge = bridge->driver_private;
+
+	if (gpio_is_valid(ptn_bridge->gpio_pd_n))
+		gpio_free(ptn_bridge->gpio_pd_n);
+	if (gpio_is_valid(ptn_bridge->gpio_rst_n))
+		gpio_free(ptn_bridge->gpio_rst_n);
+	/* Nothing else to free, we've got devm allocated memory */
+}
+EXPORT_SYMBOL(ptn3460_destroy);
diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
new file mode 100644
index 00000000000..d1187e571c6
--- /dev/null
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sub license,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <linux/err.h>
+#include <linux/module.h>
+
+#include <drm/drm_crtc.h>
+
+#include "drm/drmP.h"
+
+static DEFINE_MUTEX(bridge_lock);
+static LIST_HEAD(bridge_list);
+
+int drm_bridge_add(struct drm_bridge *bridge)
+{
+	mutex_lock(&bridge_lock);
+	list_add_tail(&bridge->list, &bridge_list);
+	mutex_unlock(&bridge_lock);
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_bridge_add);
+
+void drm_bridge_remove(struct drm_bridge *bridge)
+{
+	mutex_lock(&bridge_lock);
+	list_del_init(&bridge->list);
+	mutex_unlock(&bridge_lock);
+}
+EXPORT_SYMBOL(drm_bridge_remove);
+
+extern int drm_bridge_attach(struct drm_device *dev, struct drm_bridge *bridge)
+{
+	if (!dev || !bridge)
+		return -EINVAL;
+
+	if (bridge->dev)
+		return -EBUSY;
+
+	bridge->dev = dev;
+
+	if (bridge->funcs->attach)
+		return bridge->funcs->attach(bridge);
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_bridge_attach);
+
+#ifdef CONFIG_OF
+struct drm_bridge *of_drm_find_bridge(struct device_node *np)
+{
+	struct drm_bridge *bridge;
+
+	mutex_lock(&bridge_lock);
+
+	list_for_each_entry(bridge, &bridge_list, list) {
+		if (bridge->of_node == np) {
+			mutex_unlock(&bridge_lock);
+			return bridge;
+		}
+	}
+
+	mutex_unlock(&bridge_lock);
+	return NULL;
+}
+EXPORT_SYMBOL(of_drm_find_bridge);
+#endif
+
+MODULE_AUTHOR("Ajay Kumar <ajaykumar.rs@samsung.com>");
+MODULE_DESCRIPTION("DRM bridge infrastructure");
+MODULE_LICENSE("GPL and additional rights");
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 7936c5c2314..0e4ec700b0a 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -1065,58 +1065,6 @@ void drm_connector_unplug_all(struct drm_device *dev)
 }
 EXPORT_SYMBOL(drm_connector_unplug_all);
 
-/**
- * drm_bridge_init - initialize a drm transcoder/bridge
- * @dev: drm device
- * @bridge: transcoder/bridge to set up
- *
- * Initialises a preallocated bridge. Bridges should be
- * subclassed as part of driver connector objects.
- *
- * Returns:
- * Zero on success, error code on failure.
- */
-int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge)
-{
-	int ret;
-
-	drm_modeset_lock_all(dev);
-
-	ret = drm_mode_object_get(dev, &bridge->base, DRM_MODE_OBJECT_BRIDGE);
-	if (ret)
-		goto out;
-
-	bridge->dev = dev;
-
-	list_add_tail(&bridge->head, &dev->mode_config.bridge_list);
-	dev->mode_config.num_bridge++;
-
- out:
-	drm_modeset_unlock_all(dev);
-	return ret;
-}
-EXPORT_SYMBOL(drm_bridge_init);
-
-/**
- * drm_bridge_cleanup - cleans up an initialised bridge
- * @bridge: bridge to cleanup
- *
- * Cleans up the bridge but doesn't free the object.
- */
-void drm_bridge_cleanup(struct drm_bridge *bridge)
-{
-	struct drm_device *dev = bridge->dev;
-
-	drm_modeset_lock_all(dev);
-	drm_mode_object_put(dev, &bridge->base);
-	list_del(&bridge->head);
-	dev->mode_config.num_bridge--;
-	drm_modeset_unlock_all(dev);
-
-	memset(bridge, 0, sizeof(*bridge));
-}
-EXPORT_SYMBOL(drm_bridge_cleanup);
-
 /**
  * drm_encoder_init - Init a preallocated encoder
  * @dev: drm device
@@ -1712,7 +1660,6 @@ static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *gr
 	total_objects += dev->mode_config.num_crtc;
 	total_objects += dev->mode_config.num_connector;
 	total_objects += dev->mode_config.num_encoder;
-	total_objects += dev->mode_config.num_bridge;
 
 	group->id_list = kcalloc(total_objects, sizeof(uint32_t), GFP_KERNEL);
 	if (!group->id_list)
@@ -1721,7 +1668,6 @@ static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *gr
 	group->num_crtcs = 0;
 	group->num_connectors = 0;
 	group->num_encoders = 0;
-	group->num_bridges = 0;
 	return 0;
 }
 
@@ -1741,7 +1687,6 @@ int drm_mode_group_init_legacy_group(struct drm_device *dev,
 	struct drm_crtc *crtc;
 	struct drm_encoder *encoder;
 	struct drm_connector *connector;
-	struct drm_bridge *bridge;
 	int ret;
 
 	ret = drm_mode_group_init(dev, group);
@@ -1759,11 +1704,6 @@ int drm_mode_group_init_legacy_group(struct drm_device *dev,
 		group->id_list[group->num_crtcs + group->num_encoders +
 			       group->num_connectors++] = connector->base.id;
 
-	list_for_each_entry(bridge, &dev->mode_config.bridge_list, head)
-		group->id_list[group->num_crtcs + group->num_encoders +
-			       group->num_connectors + group->num_bridges++] =
-					bridge->base.id;
-
 	return 0;
 }
 EXPORT_SYMBOL(drm_mode_group_init_legacy_group);
@@ -5440,7 +5380,6 @@ void drm_mode_config_init(struct drm_device *dev)
 	INIT_LIST_HEAD(&dev->mode_config.fb_list);
 	INIT_LIST_HEAD(&dev->mode_config.crtc_list);
 	INIT_LIST_HEAD(&dev->mode_config.connector_list);
-	INIT_LIST_HEAD(&dev->mode_config.bridge_list);
 	INIT_LIST_HEAD(&dev->mode_config.encoder_list);
 	INIT_LIST_HEAD(&dev->mode_config.property_list);
 	INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
@@ -5480,7 +5419,6 @@ void drm_mode_config_cleanup(struct drm_device *dev)
 	struct drm_connector *connector, *ot;
 	struct drm_crtc *crtc, *ct;
 	struct drm_encoder *encoder, *enct;
-	struct drm_bridge *bridge, *brt;
 	struct drm_framebuffer *fb, *fbt;
 	struct drm_property *property, *pt;
 	struct drm_property_blob *blob, *bt;
@@ -5491,11 +5429,6 @@ void drm_mode_config_cleanup(struct drm_device *dev)
 		encoder->funcs->destroy(encoder);
 	}
 
-	list_for_each_entry_safe(bridge, brt,
-				 &dev->mode_config.bridge_list, head) {
-		bridge->funcs->destroy(bridge);
-	}
-
 	list_for_each_entry_safe(connector, ot,
 				 &dev->mode_config.connector_list, head) {
 		connector->funcs->destroy(connector);
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c
index 062c6872537..95f7b8d0f3e 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.c
@@ -247,9 +247,9 @@ int hdmi_modeset_init(struct hdmi *hdmi,
 	return 0;
 
 fail:
-	/* bridge/connector are normally destroyed by drm: */
+	/* bridge is normally destroyed by drm: */
 	if (hdmi->bridge) {
-		hdmi->bridge->funcs->destroy(hdmi->bridge);
+		hdmi_bridge_destroy(hdmi->bridge);
 		hdmi->bridge = NULL;
 	}
 	if (hdmi->connector) {
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.h b/drivers/gpu/drm/msm/hdmi/hdmi.h
index 43e654f751b..4d4cad42a77 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.h
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.h
@@ -146,6 +146,7 @@ void hdmi_audio_set_sample_rate(struct hdmi *hdmi, int rate);
  */
 
 struct drm_bridge *hdmi_bridge_init(struct hdmi *hdmi);
+void hdmi_bridge_destroy(struct drm_bridge *bridge);
 
 /*
  * hdmi connector:
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
index 52ed2b53b24..d6f8d5818e1 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
@@ -23,10 +23,9 @@ struct hdmi_bridge {
 };
 #define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base)
 
-static void hdmi_bridge_destroy(struct drm_bridge *bridge)
+void hdmi_bridge_destroy(struct drm_bridge *bridge)
 {
 	struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
-	drm_bridge_cleanup(bridge);
 	kfree(hdmi_bridge);
 }
 
@@ -200,7 +199,6 @@ static const struct drm_bridge_funcs hdmi_bridge_funcs = {
 		.disable = hdmi_bridge_disable,
 		.post_disable = hdmi_bridge_post_disable,
 		.mode_set = hdmi_bridge_mode_set,
-		.destroy = hdmi_bridge_destroy,
 };
 
 
@@ -222,7 +220,7 @@ struct drm_bridge *hdmi_bridge_init(struct hdmi *hdmi)
 	bridge = &hdmi_bridge->base;
 	bridge->funcs = &hdmi_bridge_funcs;
 
-	drm_bridge_init(hdmi->dev, bridge);
+	drm_bridge_attach(hdmi->dev, bridge);
 
 	return bridge;
 
diff --git a/drivers/gpu/drm/sti/sti_hda.c b/drivers/gpu/drm/sti/sti_hda.c
index 6cf145de9b4..a9bbb081eca 100644
--- a/drivers/gpu/drm/sti/sti_hda.c
+++ b/drivers/gpu/drm/sti/sti_hda.c
@@ -508,19 +508,12 @@ static void sti_hda_bridge_nope(struct drm_bridge *bridge)
 	/* do nothing */
 }
 
-static void sti_hda_brigde_destroy(struct drm_bridge *bridge)
-{
-	drm_bridge_cleanup(bridge);
-	kfree(bridge);
-}
-
 static const struct drm_bridge_funcs sti_hda_bridge_funcs = {
 	.pre_enable = sti_hda_pre_enable,
 	.enable = sti_hda_bridge_nope,
 	.disable = sti_hda_disable,
 	.post_disable = sti_hda_bridge_nope,
 	.mode_set = sti_hda_set_mode,
-	.destroy = sti_hda_brigde_destroy,
 };
 
 static int sti_hda_connector_get_modes(struct drm_connector *connector)
@@ -665,7 +658,7 @@ static int sti_hda_bind(struct device *dev, struct device *master, void *data)
 
 	bridge->driver_private = hda;
 	bridge->funcs = &sti_hda_bridge_funcs;
-	drm_bridge_init(drm_dev, bridge);
+	drm_bridge_attach(drm_dev, bridge);
 
 	encoder->bridge = bridge;
 	connector->encoder = encoder;
@@ -694,7 +687,6 @@ static int sti_hda_bind(struct device *dev, struct device *master, void *data)
 err_sysfs:
 	drm_connector_unregister(drm_connector);
 err_connector:
-	drm_bridge_cleanup(bridge);
 	drm_connector_cleanup(drm_connector);
 	return -EINVAL;
 }
diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c
index 74e943e655d..e840ca5de40 100644
--- a/drivers/gpu/drm/sti/sti_hdmi.c
+++ b/drivers/gpu/drm/sti/sti_hdmi.c
@@ -463,19 +463,12 @@ static void sti_hdmi_bridge_nope(struct drm_bridge *bridge)
 	/* do nothing */
 }
 
-static void sti_hdmi_brigde_destroy(struct drm_bridge *bridge)
-{
-	drm_bridge_cleanup(bridge);
-	kfree(bridge);
-}
-
 static const struct drm_bridge_funcs sti_hdmi_bridge_funcs = {
 	.pre_enable = sti_hdmi_pre_enable,
 	.enable = sti_hdmi_bridge_nope,
 	.disable = sti_hdmi_disable,
 	.post_disable = sti_hdmi_bridge_nope,
 	.mode_set = sti_hdmi_set_mode,
-	.destroy = sti_hdmi_brigde_destroy,
 };
 
 static int sti_hdmi_connector_get_modes(struct drm_connector *connector)
@@ -636,7 +629,7 @@ static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
 
 	bridge->driver_private = hdmi;
 	bridge->funcs = &sti_hdmi_bridge_funcs;
-	drm_bridge_init(drm_dev, bridge);
+	drm_bridge_attach(drm_dev, bridge);
 
 	encoder->bridge = bridge;
 	connector->encoder = encoder;
@@ -668,7 +661,6 @@ static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
 err_sysfs:
 	drm_connector_unregister(drm_connector);
 err_connector:
-	drm_bridge_cleanup(bridge);
 	drm_connector_cleanup(drm_connector);
 err_adapt:
 	put_device(&hdmi->ddc_adapt->dev);
diff --git a/include/drm/bridge/ptn3460.h b/include/drm/bridge/ptn3460.h
index ff62344fec6..b11f8e17e72 100644
--- a/include/drm/bridge/ptn3460.h
+++ b/include/drm/bridge/ptn3460.h
@@ -15,6 +15,7 @@
 #define _DRM_BRIDGE_PTN3460_H_
 
 struct drm_device;
+struct drm_bridge;
 struct drm_encoder;
 struct i2c_client;
 struct device_node;
@@ -23,6 +24,9 @@ struct device_node;
 
 int ptn3460_init(struct drm_device *dev, struct drm_encoder *encoder,
 		struct i2c_client *client, struct device_node *node);
+
+void ptn3460_destroy(struct drm_bridge *bridge);
+
 #else
 
 static inline int ptn3460_init(struct drm_device *dev,
@@ -32,6 +36,10 @@ static inline int ptn3460_init(struct drm_device *dev,
 	return 0;
 }
 
+static inline void ptn3460_destroy(struct drm_bridge *bridge)
+{
+}
+
 #endif
 
 #endif
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 15bb762fb31..920e21a8f3f 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -868,15 +868,16 @@ struct drm_plane {
 
 /**
  * struct drm_bridge_funcs - drm_bridge control functions
+ * @attach: Called during drm_bridge_attach
  * @mode_fixup: Try to fixup (or reject entirely) proposed mode for this bridge
  * @disable: Called right before encoder prepare, disables the bridge
  * @post_disable: Called right after encoder prepare, for lockstepped disable
  * @mode_set: Set this mode to the bridge
  * @pre_enable: Called right before encoder commit, for lockstepped commit
  * @enable: Called right after encoder commit, enables the bridge
- * @destroy: make object go away
  */
 struct drm_bridge_funcs {
+	int (*attach)(struct drm_bridge *bridge);
 	bool (*mode_fixup)(struct drm_bridge *bridge,
 			   const struct drm_display_mode *mode,
 			   struct drm_display_mode *adjusted_mode);
@@ -887,22 +888,24 @@ struct drm_bridge_funcs {
 			 struct drm_display_mode *adjusted_mode);
 	void (*pre_enable)(struct drm_bridge *bridge);
 	void (*enable)(struct drm_bridge *bridge);
-	void (*destroy)(struct drm_bridge *bridge);
 };
 
 /**
  * struct drm_bridge - central DRM bridge control structure
  * @dev: DRM device this bridge belongs to
- * @head: list management
+ * @of_node: device node pointer to the bridge
+ * @list: to keep track of all added bridges
  * @base: base mode object
  * @funcs: control functions
  * @driver_private: pointer to the bridge driver's internal context
  */
 struct drm_bridge {
 	struct drm_device *dev;
-	struct list_head head;
-
-	struct drm_mode_object base;
+	struct drm_encoder *encoder;
+#ifdef CONFIG_OF
+	struct device_node *of_node;
+#endif
+	struct list_head list;
 
 	const struct drm_bridge_funcs *funcs;
 	void *driver_private;
@@ -1007,7 +1010,6 @@ struct drm_mode_group {
 	uint32_t num_crtcs;
 	uint32_t num_encoders;
 	uint32_t num_connectors;
-	uint32_t num_bridges;
 
 	/* list of object IDs for this group */
 	uint32_t *id_list;
@@ -1026,8 +1028,6 @@ struct drm_mode_group {
  * @fb_list: list of framebuffers available
  * @num_connector: number of connectors on this device
  * @connector_list: list of connector objects
- * @num_bridge: number of bridges on this device
- * @bridge_list: list of bridge objects
  * @num_encoder: number of encoders on this device
  * @encoder_list: list of encoder objects
  * @num_overlay_plane: number of overlay planes on this device
@@ -1072,8 +1072,6 @@ struct drm_mode_config {
 
 	int num_connector;
 	struct list_head connector_list;
-	int num_bridge;
-	struct list_head bridge_list;
 	int num_encoder;
 	struct list_head encoder_list;
 
@@ -1222,8 +1220,10 @@ extern unsigned int drm_connector_index(struct drm_connector *connector);
 /* helper to unplug all connectors from sysfs for device */
 extern void drm_connector_unplug_all(struct drm_device *dev);
 
-extern int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge);
-extern void drm_bridge_cleanup(struct drm_bridge *bridge);
+extern int drm_bridge_add(struct drm_bridge *bridge);
+extern void drm_bridge_remove(struct drm_bridge *bridge);
+extern struct drm_bridge *of_drm_find_bridge(struct device_node *np);
+extern int drm_bridge_attach(struct drm_device *dev, struct drm_bridge *bridge);
 
 extern int drm_encoder_init(struct drm_device *dev,
 			    struct drm_encoder *encoder,
-- 
cgit v1.2.3-70-g09d2


From 6a1688ae8794ac62667ac231d20ac697bf7967fc Mon Sep 17 00:00:00 2001
From: Ajay Kumar <ajaykumar.rs@samsung.com>
Date: Tue, 20 Jan 2015 22:08:45 +0530
Subject: drm/bridge: ptn3460: Convert to I2C driver model

Use drm_bridge helpers to modify the driver to support I2C driver model.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Tested-by: Rahul Sharma <rahul.sharma@samsung.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Tested-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
[treding@nvidia.com: remove recursive dependency on I2C]
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/bridge/Kconfig          |  12 ++--
 drivers/gpu/drm/bridge/ptn3460.c        | 124 +++++++++++++++++++++-----------
 drivers/gpu/drm/exynos/exynos_dp_core.c |  22 ------
 3 files changed, 91 insertions(+), 67 deletions(-)

(limited to 'drivers/gpu/drm')

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index b70f3c8d4e8..ffa3e061a61 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -1,10 +1,12 @@
-config DRM_PTN3460
-	tristate "PTN3460 DP/LVDS bridge"
+config DRM_DW_HDMI
+	tristate
 	depends on DRM
 	select DRM_KMS_HELPER
-	---help---
 
-config DRM_DW_HDMI
-	tristate
+config DRM_PTN3460
+	tristate "PTN3460 DP/LVDS bridge"
 	depends on DRM
+	depends on OF
 	select DRM_KMS_HELPER
+	---help---
+	  ptn3460 eDP-LVDS bridge chip driver.
diff --git a/drivers/gpu/drm/bridge/ptn3460.c b/drivers/gpu/drm/bridge/ptn3460.c
index 4a818c1b62e..7adeb607f6f 100644
--- a/drivers/gpu/drm/bridge/ptn3460.c
+++ b/drivers/gpu/drm/bridge/ptn3460.c
@@ -36,7 +36,6 @@
 struct ptn3460_bridge {
 	struct drm_connector connector;
 	struct i2c_client *client;
-	struct drm_encoder *encoder;
 	struct drm_bridge bridge;
 	struct edid *edid;
 	int gpio_pd_n;
@@ -176,13 +175,6 @@ static void ptn3460_post_disable(struct drm_bridge *bridge)
 {
 }
 
-static struct drm_bridge_funcs ptn3460_bridge_funcs = {
-	.pre_enable = ptn3460_pre_enable,
-	.enable = ptn3460_enable,
-	.disable = ptn3460_disable,
-	.post_disable = ptn3460_post_disable,
-};
-
 static int ptn3460_get_modes(struct drm_connector *connector)
 {
 	struct ptn3460_bridge *ptn_bridge;
@@ -227,7 +219,7 @@ static struct drm_encoder *ptn3460_best_encoder(struct drm_connector *connector)
 {
 	struct ptn3460_bridge *ptn_bridge = connector_to_ptn3460(connector);
 
-	return ptn_bridge->encoder;
+	return ptn_bridge->bridge.encoder;
 }
 
 static struct drm_connector_helper_funcs ptn3460_connector_helper_funcs = {
@@ -253,31 +245,66 @@ static struct drm_connector_funcs ptn3460_connector_funcs = {
 	.destroy = ptn3460_connector_destroy,
 };
 
-int ptn3460_init(struct drm_device *dev, struct drm_encoder *encoder,
-		struct i2c_client *client, struct device_node *node)
+int ptn3460_bridge_attach(struct drm_bridge *bridge)
 {
+	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
 	int ret;
+
+	if (!bridge->encoder) {
+		DRM_ERROR("Parent encoder object not found");
+		return -ENODEV;
+	}
+
+	ret = drm_connector_init(bridge->dev, &ptn_bridge->connector,
+			&ptn3460_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
+	if (ret) {
+		DRM_ERROR("Failed to initialize connector with drm\n");
+		return ret;
+	}
+	drm_connector_helper_add(&ptn_bridge->connector,
+					&ptn3460_connector_helper_funcs);
+	drm_connector_register(&ptn_bridge->connector);
+	drm_mode_connector_attach_encoder(&ptn_bridge->connector,
+							bridge->encoder);
+
+	return ret;
+}
+
+static struct drm_bridge_funcs ptn3460_bridge_funcs = {
+	.pre_enable = ptn3460_pre_enable,
+	.enable = ptn3460_enable,
+	.disable = ptn3460_disable,
+	.post_disable = ptn3460_post_disable,
+	.attach = ptn3460_bridge_attach,
+};
+
+static int ptn3460_probe(struct i2c_client *client,
+				const struct i2c_device_id *id)
+{
+	struct device *dev = &client->dev;
 	struct ptn3460_bridge *ptn_bridge;
+	int ret;
 
-	ptn_bridge = devm_kzalloc(dev->dev, sizeof(*ptn_bridge), GFP_KERNEL);
+	ptn_bridge = devm_kzalloc(dev, sizeof(*ptn_bridge), GFP_KERNEL);
 	if (!ptn_bridge) {
 		return -ENOMEM;
 	}
 
 	ptn_bridge->client = client;
-	ptn_bridge->encoder = encoder;
-	ptn_bridge->gpio_pd_n = of_get_named_gpio(node, "powerdown-gpio", 0);
+	ptn_bridge->gpio_pd_n = of_get_named_gpio(dev->of_node,
+							"powerdown-gpio", 0);
 	if (gpio_is_valid(ptn_bridge->gpio_pd_n)) {
 		ret = gpio_request_one(ptn_bridge->gpio_pd_n,
 				GPIOF_OUT_INIT_HIGH, "PTN3460_PD_N");
 		if (ret) {
-			dev_err(&client->dev,
-				"Request powerdown-gpio failed (%d)\n", ret);
+			dev_err(dev, "Request powerdown-gpio failed (%d)\n",
+									ret);
 			return ret;
 		}
 	}
 
-	ptn_bridge->gpio_rst_n = of_get_named_gpio(node, "reset-gpio", 0);
+	ptn_bridge->gpio_rst_n = of_get_named_gpio(dev->of_node,
+							"reset-gpio", 0);
 	if (gpio_is_valid(ptn_bridge->gpio_rst_n)) {
 		/*
 		 * Request the reset pin low to avoid the bridge being
@@ -286,39 +313,27 @@ int ptn3460_init(struct drm_device *dev, struct drm_encoder *encoder,
 		ret = gpio_request_one(ptn_bridge->gpio_rst_n,
 				GPIOF_OUT_INIT_LOW, "PTN3460_RST_N");
 		if (ret) {
-			dev_err(&client->dev,
-				"Request reset-gpio failed (%d)\n", ret);
+			dev_err(dev, "Request reset-gpio failed (%d)\n", ret);
 			gpio_free(ptn_bridge->gpio_pd_n);
 			return ret;
 		}
 	}
 
-	ret = of_property_read_u32(node, "edid-emulation",
+	ret = of_property_read_u32(dev->of_node, "edid-emulation",
 			&ptn_bridge->edid_emulation);
 	if (ret) {
-		dev_err(&client->dev, "Can't read EDID emulation value\n");
+		dev_err(dev, "Can't read EDID emulation value\n");
 		goto err;
 	}
 
 	ptn_bridge->bridge.funcs = &ptn3460_bridge_funcs;
-	ret = drm_bridge_attach(dev, &ptn_bridge->bridge);
+	ret = drm_bridge_add(&ptn_bridge->bridge);
 	if (ret) {
-		DRM_ERROR("Failed to initialize bridge with drm\n");
+		DRM_ERROR("Failed to add bridge\n");
 		goto err;
 	}
 
-	encoder->bridge = &ptn_bridge->bridge;
-
-	ret = drm_connector_init(dev, &ptn_bridge->connector,
-			&ptn3460_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
-	if (ret) {
-		DRM_ERROR("Failed to initialize connector with drm\n");
-		goto err;
-	}
-	drm_connector_helper_add(&ptn_bridge->connector,
-			&ptn3460_connector_helper_funcs);
-	drm_connector_register(&ptn_bridge->connector);
-	drm_mode_connector_attach_encoder(&ptn_bridge->connector, encoder);
+	i2c_set_clientdata(client, ptn_bridge);
 
 	return 0;
 
@@ -329,16 +344,45 @@ err:
 		gpio_free(ptn_bridge->gpio_rst_n);
 	return ret;
 }
-EXPORT_SYMBOL(ptn3460_init);
 
-void ptn3460_destroy(struct drm_bridge *bridge)
+static int ptn3460_remove(struct i2c_client *client)
 {
-	struct ptn3460_bridge *ptn_bridge = bridge->driver_private;
+	struct ptn3460_bridge *ptn_bridge = i2c_get_clientdata(client);
+
+	drm_bridge_remove(&ptn_bridge->bridge);
 
 	if (gpio_is_valid(ptn_bridge->gpio_pd_n))
 		gpio_free(ptn_bridge->gpio_pd_n);
 	if (gpio_is_valid(ptn_bridge->gpio_rst_n))
 		gpio_free(ptn_bridge->gpio_rst_n);
-	/* Nothing else to free, we've got devm allocated memory */
+
+	return 0;
 }
-EXPORT_SYMBOL(ptn3460_destroy);
+
+static const struct i2c_device_id ptn3460_i2c_table[] = {
+	{"nxp,ptn3460", 0},
+	{},
+};
+MODULE_DEVICE_TABLE(i2c, ptn3460_i2c_table);
+
+static const struct of_device_id ptn3460_match[] = {
+	{ .compatible = "nxp,ptn3460" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, ptn3460_match);
+
+static struct i2c_driver ptn3460_driver = {
+	.id_table	= ptn3460_i2c_table,
+	.probe		= ptn3460_probe,
+	.remove		= ptn3460_remove,
+	.driver		= {
+		.name	= "nxp,ptn3460",
+		.owner	= THIS_MODULE,
+		.of_match_table = ptn3460_match,
+	},
+};
+module_i2c_driver(ptn3460_driver);
+
+MODULE_AUTHOR("Sean Paul <seanpaul@chromium.org>");
+MODULE_DESCRIPTION("NXP ptn3460 eDP-LVDS converter driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.c b/drivers/gpu/drm/exynos/exynos_dp_core.c
index 34d46aa7541..27e3d272ca2 100644
--- a/drivers/gpu/drm/exynos/exynos_dp_core.c
+++ b/drivers/gpu/drm/exynos/exynos_dp_core.c
@@ -993,32 +993,10 @@ static struct drm_connector_helper_funcs exynos_dp_connector_helper_funcs = {
 	.best_encoder = exynos_dp_best_encoder,
 };
 
-static bool find_bridge(const char *compat, struct bridge_init *bridge)
-{
-	bridge->client = NULL;
-	bridge->node = of_find_compatible_node(NULL, NULL, compat);
-	if (!bridge->node)
-		return false;
-
-	bridge->client = of_find_i2c_device_by_node(bridge->node);
-	if (!bridge->client)
-		return false;
-
-	return true;
-}
-
 /* returns the number of bridges attached */
 static int exynos_drm_attach_lcd_bridge(struct drm_device *dev,
 		struct drm_encoder *encoder)
 {
-	struct bridge_init bridge;
-	int ret;
-
-	if (find_bridge("nxp,ptn3460", &bridge)) {
-		ret = ptn3460_init(dev, encoder, bridge.client, bridge.node);
-		if (!ret)
-			return 1;
-	}
 	return 0;
 }
 
-- 
cgit v1.2.3-70-g09d2


From 801855671ad1dc751aa5aa66047cfe314170a566 Mon Sep 17 00:00:00 2001
From: Ajay Kumar <ajaykumar.rs@samsung.com>
Date: Tue, 20 Jan 2015 22:08:46 +0530
Subject: drm/exynos: dp: support drm_bridge

Modify driver to support drm_bridge.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Tested-by: Rahul Sharma <rahul.sharma@samsung.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Tested-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 .../devicetree/bindings/video/exynos_dp.txt        | 12 +++++++
 drivers/gpu/drm/exynos/exynos_dp_core.c            | 37 ++++++++++++++++++----
 drivers/gpu/drm/exynos/exynos_dp_core.h            |  1 +
 3 files changed, 44 insertions(+), 6 deletions(-)

(limited to 'drivers/gpu/drm')

diff --git a/Documentation/devicetree/bindings/video/exynos_dp.txt b/Documentation/devicetree/bindings/video/exynos_dp.txt
index 53dbccfa80c..7a3a9cdb86a 100644
--- a/Documentation/devicetree/bindings/video/exynos_dp.txt
+++ b/Documentation/devicetree/bindings/video/exynos_dp.txt
@@ -66,6 +66,10 @@ Optional properties for dp-controller:
 		Hotplug detect GPIO.
 			Indicates which GPIO should be used for hotplug
 			detection
+	-video interfaces: Device node can contain video interface port
+			    nodes according to [1].
+
+[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
 
 Example:
 
@@ -105,4 +109,12 @@ Board Specific portion:
 				vsync-len = <6>;
 			};
 		};
+
+		ports {
+			port@0 {
+				dp_out: endpoint {
+					remote-endpoint = <&bridge_in>;
+				};
+			};
+		};
 	};
diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.c b/drivers/gpu/drm/exynos/exynos_dp_core.c
index 27e3d272ca2..46f149737bc 100644
--- a/drivers/gpu/drm/exynos/exynos_dp_core.c
+++ b/drivers/gpu/drm/exynos/exynos_dp_core.c
@@ -18,6 +18,7 @@
 #include <linux/interrupt.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
+#include <linux/of_graph.h>
 #include <linux/gpio.h>
 #include <linux/component.h>
 #include <linux/phy/phy.h>
@@ -994,9 +995,19 @@ static struct drm_connector_helper_funcs exynos_dp_connector_helper_funcs = {
 };
 
 /* returns the number of bridges attached */
-static int exynos_drm_attach_lcd_bridge(struct drm_device *dev,
+static int exynos_drm_attach_lcd_bridge(struct exynos_dp_device *dp,
 		struct drm_encoder *encoder)
 {
+	int ret;
+
+	encoder->bridge = dp->bridge;
+	dp->bridge->encoder = encoder;
+	ret = drm_bridge_attach(encoder->dev, dp->bridge);
+	if (ret) {
+		DRM_ERROR("Failed to attach bridge to drm\n");
+		return ret;
+	}
+
 	return 0;
 }
 
@@ -1010,9 +1021,11 @@ static int exynos_dp_create_connector(struct exynos_drm_display *display,
 	dp->encoder = encoder;
 
 	/* Pre-empt DP connector creation if there's a bridge */
-	ret = exynos_drm_attach_lcd_bridge(dp->drm_dev, encoder);
-	if (ret)
-		return 0;
+	if (dp->bridge) {
+		ret = exynos_drm_attach_lcd_bridge(dp, encoder);
+		if (!ret)
+			return 0;
+	}
 
 	connector->polled = DRM_CONNECTOR_POLL_HPD;
 
@@ -1219,7 +1232,7 @@ static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
 		}
 	}
 
-	if (!dp->panel) {
+	if (!dp->panel && !dp->bridge) {
 		ret = exynos_dp_dt_parse_panel(dp);
 		if (ret)
 			return ret;
@@ -1303,7 +1316,7 @@ static const struct component_ops exynos_dp_ops = {
 static int exynos_dp_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct device_node *panel_node;
+	struct device_node *panel_node, *bridge_node, *endpoint;
 	struct exynos_dp_device *dp;
 	int ret;
 
@@ -1329,6 +1342,18 @@ static int exynos_dp_probe(struct platform_device *pdev)
 			return -EPROBE_DEFER;
 	}
 
+	endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
+	if (endpoint) {
+		bridge_node = of_graph_get_remote_port_parent(endpoint);
+		if (bridge_node) {
+			dp->bridge = of_drm_find_bridge(bridge_node);
+			of_node_put(bridge_node);
+			if (!dp->bridge)
+				return -EPROBE_DEFER;
+		} else
+			return -EPROBE_DEFER;
+	}
+
 	ret = component_add(&pdev->dev, &exynos_dp_ops);
 	if (ret)
 		exynos_drm_component_del(&pdev->dev,
diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.h b/drivers/gpu/drm/exynos/exynos_dp_core.h
index 164f171168e..a4e79967966 100644
--- a/drivers/gpu/drm/exynos/exynos_dp_core.h
+++ b/drivers/gpu/drm/exynos/exynos_dp_core.h
@@ -153,6 +153,7 @@ struct exynos_dp_device {
 	struct drm_connector	connector;
 	struct drm_encoder	*encoder;
 	struct drm_panel	*panel;
+	struct drm_bridge	*bridge;
 	struct clk		*clock;
 	unsigned int		irq;
 	void __iomem		*reg_base;
-- 
cgit v1.2.3-70-g09d2


From 5bbb9a2ef87a9c62fc7ce89337a2aa90802be080 Mon Sep 17 00:00:00 2001
From: Ajay Kumar <ajaykumar.rs@samsung.com>
Date: Tue, 20 Jan 2015 22:08:47 +0530
Subject: drm/bridge: ptn3460: support drm_panel

Add drm_panel calls to the driver to make the panel and
bridge work together in tandem.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Tested-by: Rahul Sharma <rahul.sharma@samsung.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Tested-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 .../devicetree/bindings/drm/bridge/ptn3460.txt     | 12 +++++++
 drivers/gpu/drm/bridge/Kconfig                     |  1 +
 drivers/gpu/drm/bridge/ptn3460.c                   | 42 ++++++++++++++++++++++
 3 files changed, 55 insertions(+)

(limited to 'drivers/gpu/drm')

diff --git a/Documentation/devicetree/bindings/drm/bridge/ptn3460.txt b/Documentation/devicetree/bindings/drm/bridge/ptn3460.txt
index 52b93b2c674..663fe6c1a6e 100644
--- a/Documentation/devicetree/bindings/drm/bridge/ptn3460.txt
+++ b/Documentation/devicetree/bindings/drm/bridge/ptn3460.txt
@@ -17,6 +17,11 @@ Required properties:
 		|   6   |  1600x900  | ChiMei M215HGE   |
 		+-------+------------+------------------+
 
+	- video interfaces: Device node can contain video interface port
+			    nodes for panel according to [1].
+
+[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
+
 Example:
 	lvds-bridge@20 {
 		compatible = "nxp,ptn3460";
@@ -24,4 +29,11 @@ Example:
 		powerdown-gpio = <&gpy2 5 1 0 0>;
 		reset-gpio = <&gpx1 5 1 0 0>;
 		edid-emulation = <5>;
+		ports {
+			port@0 {
+				bridge_out: endpoint {
+					remote-endpoint = <&panel_in>;
+				};
+			};
+		};
 	};
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index ffa3e061a61..f38bbcdf929 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -8,5 +8,6 @@ config DRM_PTN3460
 	depends on DRM
 	depends on OF
 	select DRM_KMS_HELPER
+	select DRM_PANEL
 	---help---
 	  ptn3460 eDP-LVDS bridge chip driver.
diff --git a/drivers/gpu/drm/bridge/ptn3460.c b/drivers/gpu/drm/bridge/ptn3460.c
index 7adeb607f6f..e6d5ae741a4 100644
--- a/drivers/gpu/drm/bridge/ptn3460.c
+++ b/drivers/gpu/drm/bridge/ptn3460.c
@@ -19,6 +19,9 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
+#include <linux/of_graph.h>
+
+#include <drm/drm_panel.h>
 
 #include "bridge/ptn3460.h"
 
@@ -38,6 +41,7 @@ struct ptn3460_bridge {
 	struct i2c_client *client;
 	struct drm_bridge bridge;
 	struct edid *edid;
+	struct drm_panel *panel;
 	int gpio_pd_n;
 	int gpio_rst_n;
 	u32 edid_emulation;
@@ -137,6 +141,11 @@ static void ptn3460_pre_enable(struct drm_bridge *bridge)
 		gpio_set_value(ptn_bridge->gpio_rst_n, 1);
 	}
 
+	if (drm_panel_prepare(ptn_bridge->panel)) {
+		DRM_ERROR("failed to prepare panel\n");
+		return;
+	}
+
 	/*
 	 * There's a bug in the PTN chip where it falsely asserts hotplug before
 	 * it is fully functional. We're forced to wait for the maximum start up
@@ -153,6 +162,12 @@ static void ptn3460_pre_enable(struct drm_bridge *bridge)
 
 static void ptn3460_enable(struct drm_bridge *bridge)
 {
+	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
+
+	if (drm_panel_enable(ptn_bridge->panel)) {
+		DRM_ERROR("failed to enable panel\n");
+		return;
+	}
 }
 
 static void ptn3460_disable(struct drm_bridge *bridge)
@@ -164,6 +179,11 @@ static void ptn3460_disable(struct drm_bridge *bridge)
 
 	ptn_bridge->enabled = false;
 
+	if (drm_panel_disable(ptn_bridge->panel)) {
+		DRM_ERROR("failed to disable panel\n");
+		return;
+	}
+
 	if (gpio_is_valid(ptn_bridge->gpio_rst_n))
 		gpio_set_value(ptn_bridge->gpio_rst_n, 1);
 
@@ -173,6 +193,12 @@ static void ptn3460_disable(struct drm_bridge *bridge)
 
 static void ptn3460_post_disable(struct drm_bridge *bridge)
 {
+	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
+
+	if (drm_panel_unprepare(ptn_bridge->panel)) {
+		DRM_ERROR("failed to unprepare panel\n");
+		return;
+	}
 }
 
 static int ptn3460_get_modes(struct drm_connector *connector)
@@ -267,6 +293,9 @@ int ptn3460_bridge_attach(struct drm_bridge *bridge)
 	drm_mode_connector_attach_encoder(&ptn_bridge->connector,
 							bridge->encoder);
 
+	if (ptn_bridge->panel)
+		drm_panel_attach(ptn_bridge->panel, &ptn_bridge->connector);
+
 	return ret;
 }
 
@@ -283,6 +312,7 @@ static int ptn3460_probe(struct i2c_client *client,
 {
 	struct device *dev = &client->dev;
 	struct ptn3460_bridge *ptn_bridge;
+	struct device_node *endpoint, *panel_node;
 	int ret;
 
 	ptn_bridge = devm_kzalloc(dev, sizeof(*ptn_bridge), GFP_KERNEL);
@@ -290,6 +320,17 @@ static int ptn3460_probe(struct i2c_client *client,
 		return -ENOMEM;
 	}
 
+	endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
+	if (endpoint) {
+		panel_node = of_graph_get_remote_port_parent(endpoint);
+		if (panel_node) {
+			ptn_bridge->panel = of_drm_find_panel(panel_node);
+			of_node_put(panel_node);
+			if (!ptn_bridge->panel)
+				return -EPROBE_DEFER;
+		}
+	}
+
 	ptn_bridge->client = client;
 	ptn_bridge->gpio_pd_n = of_get_named_gpio(dev->of_node,
 							"powerdown-gpio", 0);
@@ -327,6 +368,7 @@ static int ptn3460_probe(struct i2c_client *client,
 	}
 
 	ptn_bridge->bridge.funcs = &ptn3460_bridge_funcs;
+	ptn_bridge->bridge.of_node = dev->of_node;
 	ret = drm_bridge_add(&ptn_bridge->bridge);
 	if (ret) {
 		DRM_ERROR("Failed to add bridge\n");
-- 
cgit v1.2.3-70-g09d2


From a1899953c031aba0467b5fa0b63dd9b594aa658e Mon Sep 17 00:00:00 2001
From: Ajay Kumar <ajaykumar.rs@samsung.com>
Date: Tue, 20 Jan 2015 22:08:48 +0530
Subject: drm/bridge: ptn3460: probe connector at the end of bridge attach

Force bridge connector detection at the end of the bridge attach.
This is needed to detect the bridge connector early.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Tested-by: Rahul Sharma <rahul.sharma@samsung.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Tested-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/bridge/ptn3460.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers/gpu/drm')

diff --git a/drivers/gpu/drm/bridge/ptn3460.c b/drivers/gpu/drm/bridge/ptn3460.c
index e6d5ae741a4..9f800a1ab38 100644
--- a/drivers/gpu/drm/bridge/ptn3460.c
+++ b/drivers/gpu/drm/bridge/ptn3460.c
@@ -281,6 +281,7 @@ int ptn3460_bridge_attach(struct drm_bridge *bridge)
 		return -ENODEV;
 	}
 
+	ptn_bridge->connector.polled = DRM_CONNECTOR_POLL_HPD;
 	ret = drm_connector_init(bridge->dev, &ptn_bridge->connector,
 			&ptn3460_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
 	if (ret) {
@@ -296,6 +297,8 @@ int ptn3460_bridge_attach(struct drm_bridge *bridge)
 	if (ptn_bridge->panel)
 		drm_panel_attach(ptn_bridge->panel, &ptn_bridge->connector);
 
+	drm_helper_hpd_irq_event(ptn_bridge->connector.dev);
+
 	return ret;
 }
 
-- 
cgit v1.2.3-70-g09d2


From af478d8823a707958b518a73573eca65c9ff2a91 Mon Sep 17 00:00:00 2001
From: Ajay Kumar <ajaykumar.rs@samsung.com>
Date: Tue, 20 Jan 2015 22:08:49 +0530
Subject: drm/bridge: ptn3460: use gpiod interface

Modify driver to support gpiod interface.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Tested-by: Rahul Sharma <rahul.sharma@samsung.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Tested-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/bridge/ptn3460.c | 88 ++++++++++++++++------------------------
 1 file changed, 36 insertions(+), 52 deletions(-)

(limited to 'drivers/gpu/drm')

diff --git a/drivers/gpu/drm/bridge/ptn3460.c b/drivers/gpu/drm/bridge/ptn3460.c
index 9f800a1ab38..826833e396f 100644
--- a/drivers/gpu/drm/bridge/ptn3460.c
+++ b/drivers/gpu/drm/bridge/ptn3460.c
@@ -42,8 +42,8 @@ struct ptn3460_bridge {
 	struct drm_bridge bridge;
 	struct edid *edid;
 	struct drm_panel *panel;
-	int gpio_pd_n;
-	int gpio_rst_n;
+	struct gpio_desc *gpio_pd_n;
+	struct gpio_desc *gpio_rst_n;
 	u32 edid_emulation;
 	bool enabled;
 };
@@ -132,14 +132,11 @@ static void ptn3460_pre_enable(struct drm_bridge *bridge)
 	if (ptn_bridge->enabled)
 		return;
 
-	if (gpio_is_valid(ptn_bridge->gpio_pd_n))
-		gpio_set_value(ptn_bridge->gpio_pd_n, 1);
+	gpiod_set_value(ptn_bridge->gpio_pd_n, 1);
 
-	if (gpio_is_valid(ptn_bridge->gpio_rst_n)) {
-		gpio_set_value(ptn_bridge->gpio_rst_n, 0);
-		usleep_range(10, 20);
-		gpio_set_value(ptn_bridge->gpio_rst_n, 1);
-	}
+	gpiod_set_value(ptn_bridge->gpio_rst_n, 0);
+	usleep_range(10, 20);
+	gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
 
 	if (drm_panel_prepare(ptn_bridge->panel)) {
 		DRM_ERROR("failed to prepare panel\n");
@@ -184,11 +181,8 @@ static void ptn3460_disable(struct drm_bridge *bridge)
 		return;
 	}
 
-	if (gpio_is_valid(ptn_bridge->gpio_rst_n))
-		gpio_set_value(ptn_bridge->gpio_rst_n, 1);
-
-	if (gpio_is_valid(ptn_bridge->gpio_pd_n))
-		gpio_set_value(ptn_bridge->gpio_pd_n, 0);
+	gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
+	gpiod_set_value(ptn_bridge->gpio_pd_n, 0);
 }
 
 static void ptn3460_post_disable(struct drm_bridge *bridge)
@@ -335,39 +329,41 @@ static int ptn3460_probe(struct i2c_client *client,
 	}
 
 	ptn_bridge->client = client;
-	ptn_bridge->gpio_pd_n = of_get_named_gpio(dev->of_node,
-							"powerdown-gpio", 0);
-	if (gpio_is_valid(ptn_bridge->gpio_pd_n)) {
-		ret = gpio_request_one(ptn_bridge->gpio_pd_n,
-				GPIOF_OUT_INIT_HIGH, "PTN3460_PD_N");
-		if (ret) {
-			dev_err(dev, "Request powerdown-gpio failed (%d)\n",
-									ret);
-			return ret;
-		}
+
+	ptn_bridge->gpio_pd_n = devm_gpiod_get(&client->dev, "powerdown");
+	if (IS_ERR(ptn_bridge->gpio_pd_n)) {
+		ret = PTR_ERR(ptn_bridge->gpio_pd_n);
+		dev_err(dev, "cannot get gpio_pd_n %d\n", ret);
+		return ret;
 	}
 
-	ptn_bridge->gpio_rst_n = of_get_named_gpio(dev->of_node,
-							"reset-gpio", 0);
-	if (gpio_is_valid(ptn_bridge->gpio_rst_n)) {
-		/*
-		 * Request the reset pin low to avoid the bridge being
-		 * initialized prematurely
-		 */
-		ret = gpio_request_one(ptn_bridge->gpio_rst_n,
-				GPIOF_OUT_INIT_LOW, "PTN3460_RST_N");
-		if (ret) {
-			dev_err(dev, "Request reset-gpio failed (%d)\n", ret);
-			gpio_free(ptn_bridge->gpio_pd_n);
-			return ret;
-		}
+	ret = gpiod_direction_output(ptn_bridge->gpio_pd_n, 1);
+	if (ret) {
+		DRM_ERROR("cannot configure gpio_pd_n\n");
+		return ret;
+	}
+
+	ptn_bridge->gpio_rst_n = devm_gpiod_get(&client->dev, "reset");
+	if (IS_ERR(ptn_bridge->gpio_rst_n)) {
+		ret = PTR_ERR(ptn_bridge->gpio_rst_n);
+		DRM_ERROR("cannot get gpio_rst_n %d\n", ret);
+		return ret;
+	}
+	/*
+	 * Request the reset pin low to avoid the bridge being
+	 * initialized prematurely
+	 */
+	ret = gpiod_direction_output(ptn_bridge->gpio_rst_n, 0);
+	if (ret) {
+		DRM_ERROR("cannot configure gpio_rst_n\n");
+		return ret;
 	}
 
 	ret = of_property_read_u32(dev->of_node, "edid-emulation",
 			&ptn_bridge->edid_emulation);
 	if (ret) {
 		dev_err(dev, "Can't read EDID emulation value\n");
-		goto err;
+		return ret;
 	}
 
 	ptn_bridge->bridge.funcs = &ptn3460_bridge_funcs;
@@ -375,19 +371,12 @@ static int ptn3460_probe(struct i2c_client *client,
 	ret = drm_bridge_add(&ptn_bridge->bridge);
 	if (ret) {
 		DRM_ERROR("Failed to add bridge\n");
-		goto err;
+		return ret;
 	}
 
 	i2c_set_clientdata(client, ptn_bridge);
 
 	return 0;
-
-err:
-	if (gpio_is_valid(ptn_bridge->gpio_pd_n))
-		gpio_free(ptn_bridge->gpio_pd_n);
-	if (gpio_is_valid(ptn_bridge->gpio_rst_n))
-		gpio_free(ptn_bridge->gpio_rst_n);
-	return ret;
 }
 
 static int ptn3460_remove(struct i2c_client *client)
@@ -396,11 +385,6 @@ static int ptn3460_remove(struct i2c_client *client)
 
 	drm_bridge_remove(&ptn_bridge->bridge);
 
-	if (gpio_is_valid(ptn_bridge->gpio_pd_n))
-		gpio_free(ptn_bridge->gpio_pd_n);
-	if (gpio_is_valid(ptn_bridge->gpio_rst_n))
-		gpio_free(ptn_bridge->gpio_rst_n);
-
 	return 0;
 }
 
-- 
cgit v1.2.3-70-g09d2


From 944579c5a474e5faffd3ff2ee0e45eb7c53c3fd3 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 28 Jan 2015 09:43:35 +0300
Subject: drm: Check the right variable when setting formats

When setting the video bus supported formats for a display device using
drm_display_info_set_bus_formats(), check for the proper variable after
duplicating memory.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/drm_crtc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/gpu/drm')

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 0e4ec700b0a..6b00173d1be 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -787,7 +787,7 @@ int drm_display_info_set_bus_formats(struct drm_display_info *info,
 	if (formats && num_formats) {
 		fmts = kmemdup(formats, sizeof(*formats) * num_formats,
 			       GFP_KERNEL);
-		if (!formats)
+		if (!fmts)
 			return -ENOMEM;
 	}
 
-- 
cgit v1.2.3-70-g09d2


From b33ef61970873d479f4273f36d7a516cd94167e1 Mon Sep 17 00:00:00 2001
From: Fabio Estevam <fabio.estevam@freescale.com>
Date: Tue, 27 Jan 2015 10:54:12 -0200
Subject: drm/bridge: dw-hdmi: Fix return error path

If devm_request_threaded_irq() fails we should jump to 'err_iahb' label that
will disable the clocks that were previously enabled.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/gpu/drm')

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 6ea00050417..cb1dbb1aca1 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -1649,7 +1649,7 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
 					dw_hdmi_irq, IRQF_SHARED,
 					dev_name(dev), hdmi);
 	if (ret)
-		return ret;
+		goto err_iahb;
 
 	/*
 	 * To prevent overflows in HDMI_IH_FC_STAT2, set the clk regenerator
-- 
cgit v1.2.3-70-g09d2


From 384764c3611645d96889742a079168c86a6fc4c4 Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@redhat.com>
Date: Tue, 27 Jan 2015 09:37:03 +1000
Subject: drm/sti: fixup for bridge interface

So sti doesn't build because the bridge interfaces changes didn't
catch up to its new DVO driver.

Now I might just carry this patch, but I might just push the
bridge pull into a side-pull until someone resolves it.

So this might not be the right solution to the problem, so
please figure it out and let me know ASAP.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/sti/sti_dvo.c | 29 +++++++++++++++++++----------
 1 file changed, 19 insertions(+), 10 deletions(-)

(limited to 'drivers/gpu/drm')

diff --git a/drivers/gpu/drm/sti/sti_dvo.c b/drivers/gpu/drm/sti/sti_dvo.c
index 651afad21f9..aeb5070c836 100644
--- a/drivers/gpu/drm/sti/sti_dvo.c
+++ b/drivers/gpu/drm/sti/sti_dvo.c
@@ -91,6 +91,7 @@ struct sti_dvo {
 	struct dvo_config *config;
 	bool enabled;
 	struct drm_encoder *encoder;
+	struct drm_bridge *bridge;
 };
 
 struct sti_dvo_connector {
@@ -272,19 +273,12 @@ static void sti_dvo_bridge_nope(struct drm_bridge *bridge)
 	/* do nothing */
 }
 
-static void sti_dvo_brigde_destroy(struct drm_bridge *bridge)
-{
-	drm_bridge_cleanup(bridge);
-	kfree(bridge);
-}
-
 static const struct drm_bridge_funcs sti_dvo_bridge_funcs = {
 	.pre_enable = sti_dvo_pre_enable,
 	.enable = sti_dvo_bridge_nope,
 	.disable = sti_dvo_disable,
 	.post_disable = sti_dvo_bridge_nope,
 	.mode_set = sti_dvo_set_mode,
-	.destroy = sti_dvo_brigde_destroy,
 };
 
 static int sti_dvo_connector_get_modes(struct drm_connector *connector)
@@ -416,8 +410,21 @@ static int sti_dvo_bind(struct device *dev, struct device *master, void *data)
 		return -ENOMEM;
 
 	bridge->driver_private = dvo;
-	drm_bridge_init(drm_dev, bridge, &sti_dvo_bridge_funcs);
+	bridge->funcs = &sti_dvo_bridge_funcs;
+	bridge->of_node = dvo->dev.of_node;
+	err = drm_bridge_add(bridge);
+	if (err) {
+		DRM_ERROR("Failed to add bridge\n");
+		return err;
+	}
 
+	err = drm_bridge_attach(drm_dev, bridge);
+	if (err) {
+		DRM_ERROR("Failed to attach bridge\n");
+		return err;
+	}
+
+	dvo->bridge = bridge;
 	encoder->bridge = bridge;
 	connector->encoder = encoder;
 	dvo->encoder = encoder;
@@ -446,7 +453,7 @@ static int sti_dvo_bind(struct device *dev, struct device *master, void *data)
 err_sysfs:
 	drm_connector_unregister(drm_connector);
 err_connector:
-	drm_bridge_cleanup(bridge);
+	drm_bridge_remove(bridge);
 	drm_connector_cleanup(drm_connector);
 	return -EINVAL;
 }
@@ -454,7 +461,9 @@ err_connector:
 static void sti_dvo_unbind(struct device *dev,
 			   struct device *master, void *data)
 {
-	/* do nothing */
+	struct sti_dvo *dvo = dev_get_drvdata(dev);
+
+	drm_bridge_remove(dvo->bridge);
 }
 
 static const struct component_ops sti_dvo_ops = {
-- 
cgit v1.2.3-70-g09d2


From b5217bf4692218d202d3d2cd772864fa1e10be4d Mon Sep 17 00:00:00 2001
From: Fabio Estevam <fabio.estevam@freescale.com>
Date: Tue, 27 Jan 2015 10:21:49 -0200
Subject: drm/bridge: dw-hdmi: Adapt to bridge API change

Commit fbc4572e9c48e45b ("drm/bridge: make bridge registration independent of
drm flow") introduced some drm/bridge API modifications. Make the necessary
changes so that we can avoid the build breakage:

drivers/gpu/drm/bridge/dw_hdmi.c: In function 'dw_hdmi_bridge_destroy':
drivers/gpu/drm/bridge/dw_hdmi.c:1378:2: error: implicit declaration of function 'drm_bridge_cleanup' [-Werror=implicit-function-declaration]
drivers/gpu/drm/bridge/dw_hdmi.c: At top level:
drivers/gpu/drm/bridge/dw_hdmi.c:1471:2: error: unknown field 'destroy' specified in initializer
drivers/gpu/drm/bridge/dw_hdmi.c: In function 'dw_hdmi_register':
drivers/gpu/drm/bridge/dw_hdmi.c:1535:2: error: implicit declaration of function 'drm_bridge_init' [-Werror=implicit-function-declaration]

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

(limited to 'drivers/gpu/drm')

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index cb1dbb1aca1..cd6a70647e3 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -1373,12 +1373,6 @@ static void dw_hdmi_bridge_enable(struct drm_bridge *bridge)
 	dw_hdmi_poweron(hdmi);
 }
 
-static void dw_hdmi_bridge_destroy(struct drm_bridge *bridge)
-{
-	drm_bridge_cleanup(bridge);
-	kfree(bridge);
-}
-
 static void dw_hdmi_bridge_nop(struct drm_bridge *bridge)
 {
 	/* do nothing */
@@ -1468,7 +1462,6 @@ struct drm_bridge_funcs dw_hdmi_bridge_funcs = {
 	.post_disable = dw_hdmi_bridge_nop,
 	.mode_set = dw_hdmi_bridge_mode_set,
 	.mode_fixup = dw_hdmi_bridge_mode_fixup,
-	.destroy = dw_hdmi_bridge_destroy,
 };
 
 static irqreturn_t dw_hdmi_hardirq(int irq, void *dev_id)
@@ -1531,8 +1524,8 @@ static int dw_hdmi_register(struct drm_device *drm, struct dw_hdmi *hdmi)
 
 	hdmi->bridge = bridge;
 	bridge->driver_private = hdmi;
-
-	ret = drm_bridge_init(drm, bridge, &dw_hdmi_bridge_funcs);
+	bridge->funcs = &dw_hdmi_bridge_funcs;
+	ret = drm_bridge_attach(drm, bridge);
 	if (ret) {
 		DRM_ERROR("Failed to initialize bridge with drm\n");
 		return -EINVAL;
-- 
cgit v1.2.3-70-g09d2