[PATCH drm/hisilicon v3 0/2] support reading resolutions from EDID

[PATCH drm/hisilicon v3 0/2] support reading resolutions from EDID

[Tian Tao]

patch #1 add a new file to implements i2c adapters, #2 read the
resolution from the edid, if that fails, set the resolution to fixed.
and update the destroy callback function to release the i2c adapters

Changes since v1:
-merge patch #3 into patch #2.
-add new function to_hibmc_drm_private, modify three functions in
hibmc_drm_i2c.c with the newly added function.
-deleting the member variable dev from the structure hibmc_connector.
-modify print log incorrectly.
-Modify hibmc_connector_get_modes.

Changes since v2:
-rewrite the function to_hibmc_drm_private, and rename GPIO_SCL_MASK
to I2C_SCL_MASK

Tian Tao (2):
  drm/hisilicon: Support i2c driver algorithms for bit-shift adapters
  drm/hisilicon: Features to support reading resolutions from EDID

 drivers/gpu/drm/hisilicon/hibmc/Makefile         |  2 +-
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h  | 25 +++++-
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c  | 99 ++++++++++++++++++++++++
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c | 38 ++++++++-
 4 files changed, 158 insertions(+), 6 deletions(-)
 create mode 100644 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c

-- 
2.7.4

[PATCH drm/hisilicon v3 0/2] support reading resolutions from EDID

[Tian Tao]

patch #1 add a new file to implements i2c adapters, #2 read the
resolution from the edid, if that fails, set the resolution to fixed.
and update the destroy callback function to release the i2c adapters

Changes since v1:
-merge patch #3 into patch #2.
-add new function to_hibmc_drm_private, modify three functions in
hibmc_drm_i2c.c with the newly added function.
-deleting the member variable dev from the structure hibmc_connector.
-modify print log incorrectly.
-Modify hibmc_connector_get_modes.

Changes since v2:
-rewrite the function to_hibmc_drm_private, and rename GPIO_SCL_MASK
to I2C_SCL_MASK

Tian Tao (2):
  drm/hisilicon: Support i2c driver algorithms for bit-shift adapters
  drm/hisilicon: Features to support reading resolutions from EDID

 drivers/gpu/drm/hisilicon/hibmc/Makefile         |  2 +-
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h  | 25 +++++-
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c  | 99 ++++++++++++++++++++++++
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c | 38 ++++++++-
 4 files changed, 158 insertions(+), 6 deletions(-)
 create mode 100644 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c

-- 
2.7.4

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[PATCH drm/hisilicon v3 1/2] drm/hisilicon: Support i2c driver algorithms for bit-shift adapters

[Tian Tao]

Adding driver implementation to support i2c driver algorithms for
bit-shift adapters, so hibmc will using the interface provided by
drm to read edid.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/hisilicon/hibmc/Makefile        |  2 +-
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h | 25 ++++++-
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c | 99 +++++++++++++++++++++++++
 3 files changed, 124 insertions(+), 2 deletions(-)
 create mode 100644 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c

diff --git a/drivers/gpu/drm/hisilicon/hibmc/Makefile b/drivers/gpu/drm/hisilicon/hibmc/Makefile
index f991327..684ef79 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/Makefile
+++ b/drivers/gpu/drm/hisilicon/hibmc/Makefile
@@ -1,4 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0-only
-hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_de.o hibmc_drm_vdac.o hibmc_ttm.o
+hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_de.o hibmc_drm_vdac.o hibmc_ttm.o hibmc_drm_i2c.o
 
 obj-$(CONFIG_DRM_HISI_HIBMC) += hibmc-drm.o
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
index 197485e..87d2aad 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
@@ -14,11 +14,23 @@
 #ifndef HIBMC_DRM_DRV_H
 #define HIBMC_DRM_DRV_H
 
+#include <linux/gpio/consumer.h>
+#include <linux/i2c-algo-bit.h>
+#include <linux/i2c.h>
+
+#include <drm/drm_edid.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_framebuffer.h>
 
 struct drm_device;
 
+struct hibmc_connector {
+	struct drm_connector base;
+
+	struct i2c_adapter adapter;
+	struct i2c_algo_bit_data bit_data;
+};
+
 struct hibmc_drm_private {
 	/* hw */
 	void __iomem   *mmio;
@@ -31,10 +43,20 @@ struct hibmc_drm_private {
 	struct drm_plane primary_plane;
 	struct drm_crtc crtc;
 	struct drm_encoder encoder;
-	struct drm_connector connector;
+	struct hibmc_connector connector;
 	bool mode_config_initialized;
 };
 
+static inline struct hibmc_connector *to_hibmc_connector(struct drm_connector *connector)
+{
+	return container_of(connector, struct hibmc_connector, base);
+}
+
+static inline struct hibmc_drm_private *to_hibmc_drm_private(struct drm_device *dev)
+{
+	return dev->dev_private;
+}
+
 void hibmc_set_power_mode(struct hibmc_drm_private *priv,
 			  unsigned int power_mode);
 void hibmc_set_current_gate(struct hibmc_drm_private *priv,
@@ -47,6 +69,7 @@ int hibmc_mm_init(struct hibmc_drm_private *hibmc);
 void hibmc_mm_fini(struct hibmc_drm_private *hibmc);
 int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
 		      struct drm_mode_create_dumb *args);
+int hibmc_ddc_create(struct drm_device *drm_dev, struct hibmc_connector *connector);
 
 extern const struct drm_mode_config_funcs hibmc_mode_funcs;
 
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c
new file mode 100644
index 0000000..86d7120
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *      Tian Tao <tiantao6@hisilicon.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/pci.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_probe_helper.h>
+
+#include "hibmc_drm_drv.h"
+
+#define GPIO_DATA		0x0802A0
+#define GPIO_DATA_DIRECTION	0x0802A4
+
+#define I2C_SCL_MASK		BIT(0)
+#define I2C_SDA_MASK		BIT(1)
+
+static void hibmc_set_i2c_signal(void *data, u32 mask, int value)
+{
+	struct hibmc_connector *hibmc_connector = data;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(hibmc_connector->base.dev);
+	u32 tmp_dir = readl(priv->mmio + GPIO_DATA_DIRECTION);
+
+	if (value) {
+		tmp_dir &= ~mask;
+		writel(tmp_dir, priv->mmio + GPIO_DATA_DIRECTION);
+	} else {
+		u32 tmp_data = readl(priv->mmio + GPIO_DATA);
+
+		tmp_data &= ~mask;
+		writel(tmp_data, priv->mmio + GPIO_DATA);
+
+		tmp_dir |= mask;
+		writel(tmp_dir, priv->mmio + GPIO_DATA_DIRECTION);
+	}
+}
+
+static int hibmc_get_i2c_signal(void *data, u32 mask)
+{
+	struct hibmc_connector *hibmc_connector = data;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(hibmc_connector->base.dev);
+	u32 tmp_dir = readl(priv->mmio + GPIO_DATA_DIRECTION);
+
+	if ((tmp_dir & mask) != mask) {
+		tmp_dir &= ~mask;
+		writel(tmp_dir, priv->mmio + GPIO_DATA_DIRECTION);
+	}
+
+	return (readl(priv->mmio + GPIO_DATA) & mask) ? 1 : 0;
+}
+
+static void hibmc_ddc_setsda(void *data, int state)
+{
+	hibmc_set_i2c_signal(data, I2C_SDA_MASK, state);
+}
+
+static void hibmc_ddc_setscl(void *data, int state)
+{
+	hibmc_set_i2c_signal(data, I2C_SCL_MASK, state);
+}
+
+static int hibmc_ddc_getsda(void *data)
+{
+	return hibmc_get_i2c_signal(data, I2C_SDA_MASK);
+}
+
+static int hibmc_ddc_getscl(void *data)
+{
+	return hibmc_get_i2c_signal(data, I2C_SCL_MASK);
+}
+
+int hibmc_ddc_create(struct drm_device *drm_dev,
+		     struct hibmc_connector *connector)
+{
+	connector->adapter.owner = THIS_MODULE;
+	connector->adapter.class = I2C_CLASS_DDC;
+	snprintf(connector->adapter.name, I2C_NAME_SIZE, "HIS i2c bit bus");
+	connector->adapter.dev.parent = &drm_dev->pdev->dev;
+	i2c_set_adapdata(&connector->adapter, connector);
+	connector->adapter.algo_data = &connector->bit_data;
+
+	connector->bit_data.udelay = 20;
+	connector->bit_data.timeout = usecs_to_jiffies(2000);
+	connector->bit_data.data = connector;
+	connector->bit_data.setsda = hibmc_ddc_setsda;
+	connector->bit_data.setscl = hibmc_ddc_setscl;
+	connector->bit_data.getsda = hibmc_ddc_getsda;
+	connector->bit_data.getscl = hibmc_ddc_getscl;
+
+	return i2c_bit_add_bus(&connector->adapter);
+}
-- 
2.7.4

[PATCH drm/hisilicon v3 1/2] drm/hisilicon: Support i2c driver algorithms for bit-shift adapters

[Tian Tao]

Adding driver implementation to support i2c driver algorithms for
bit-shift adapters, so hibmc will using the interface provided by
drm to read edid.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/hisilicon/hibmc/Makefile        |  2 +-
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h | 25 ++++++-
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c | 99 +++++++++++++++++++++++++
 3 files changed, 124 insertions(+), 2 deletions(-)
 create mode 100644 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c

diff --git a/drivers/gpu/drm/hisilicon/hibmc/Makefile b/drivers/gpu/drm/hisilicon/hibmc/Makefile
index f991327..684ef79 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/Makefile
+++ b/drivers/gpu/drm/hisilicon/hibmc/Makefile
@@ -1,4 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0-only
-hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_de.o hibmc_drm_vdac.o hibmc_ttm.o
+hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_de.o hibmc_drm_vdac.o hibmc_ttm.o hibmc_drm_i2c.o
 
 obj-$(CONFIG_DRM_HISI_HIBMC) += hibmc-drm.o
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
index 197485e..87d2aad 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
@@ -14,11 +14,23 @@
 #ifndef HIBMC_DRM_DRV_H
 #define HIBMC_DRM_DRV_H
 
+#include <linux/gpio/consumer.h>
+#include <linux/i2c-algo-bit.h>
+#include <linux/i2c.h>
+
+#include <drm/drm_edid.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_framebuffer.h>
 
 struct drm_device;
 
+struct hibmc_connector {
+	struct drm_connector base;
+
+	struct i2c_adapter adapter;
+	struct i2c_algo_bit_data bit_data;
+};
+
 struct hibmc_drm_private {
 	/* hw */
 	void __iomem   *mmio;
@@ -31,10 +43,20 @@ struct hibmc_drm_private {
 	struct drm_plane primary_plane;
 	struct drm_crtc crtc;
 	struct drm_encoder encoder;
-	struct drm_connector connector;
+	struct hibmc_connector connector;
 	bool mode_config_initialized;
 };
 
+static inline struct hibmc_connector *to_hibmc_connector(struct drm_connector *connector)
+{
+	return container_of(connector, struct hibmc_connector, base);
+}
+
+static inline struct hibmc_drm_private *to_hibmc_drm_private(struct drm_device *dev)
+{
+	return dev->dev_private;
+}
+
 void hibmc_set_power_mode(struct hibmc_drm_private *priv,
 			  unsigned int power_mode);
 void hibmc_set_current_gate(struct hibmc_drm_private *priv,
@@ -47,6 +69,7 @@ int hibmc_mm_init(struct hibmc_drm_private *hibmc);
 void hibmc_mm_fini(struct hibmc_drm_private *hibmc);
 int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
 		      struct drm_mode_create_dumb *args);
+int hibmc_ddc_create(struct drm_device *drm_dev, struct hibmc_connector *connector);
 
 extern const struct drm_mode_config_funcs hibmc_mode_funcs;
 
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c
new file mode 100644
index 0000000..86d7120
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *      Tian Tao <tiantao6@hisilicon.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/pci.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_probe_helper.h>
+
+#include "hibmc_drm_drv.h"
+
+#define GPIO_DATA		0x0802A0
+#define GPIO_DATA_DIRECTION	0x0802A4
+
+#define I2C_SCL_MASK		BIT(0)
+#define I2C_SDA_MASK		BIT(1)
+
+static void hibmc_set_i2c_signal(void *data, u32 mask, int value)
+{
+	struct hibmc_connector *hibmc_connector = data;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(hibmc_connector->base.dev);
+	u32 tmp_dir = readl(priv->mmio + GPIO_DATA_DIRECTION);
+
+	if (value) {
+		tmp_dir &= ~mask;
+		writel(tmp_dir, priv->mmio + GPIO_DATA_DIRECTION);
+	} else {
+		u32 tmp_data = readl(priv->mmio + GPIO_DATA);
+
+		tmp_data &= ~mask;
+		writel(tmp_data, priv->mmio + GPIO_DATA);
+
+		tmp_dir |= mask;
+		writel(tmp_dir, priv->mmio + GPIO_DATA_DIRECTION);
+	}
+}
+
+static int hibmc_get_i2c_signal(void *data, u32 mask)
+{
+	struct hibmc_connector *hibmc_connector = data;
+	struct hibmc_drm_private *priv = to_hibmc_drm_private(hibmc_connector->base.dev);
+	u32 tmp_dir = readl(priv->mmio + GPIO_DATA_DIRECTION);
+
+	if ((tmp_dir & mask) != mask) {
+		tmp_dir &= ~mask;
+		writel(tmp_dir, priv->mmio + GPIO_DATA_DIRECTION);
+	}
+
+	return (readl(priv->mmio + GPIO_DATA) & mask) ? 1 : 0;
+}
+
+static void hibmc_ddc_setsda(void *data, int state)
+{
+	hibmc_set_i2c_signal(data, I2C_SDA_MASK, state);
+}
+
+static void hibmc_ddc_setscl(void *data, int state)
+{
+	hibmc_set_i2c_signal(data, I2C_SCL_MASK, state);
+}
+
+static int hibmc_ddc_getsda(void *data)
+{
+	return hibmc_get_i2c_signal(data, I2C_SDA_MASK);
+}
+
+static int hibmc_ddc_getscl(void *data)
+{
+	return hibmc_get_i2c_signal(data, I2C_SCL_MASK);
+}
+
+int hibmc_ddc_create(struct drm_device *drm_dev,
+		     struct hibmc_connector *connector)
+{
+	connector->adapter.owner = THIS_MODULE;
+	connector->adapter.class = I2C_CLASS_DDC;
+	snprintf(connector->adapter.name, I2C_NAME_SIZE, "HIS i2c bit bus");
+	connector->adapter.dev.parent = &drm_dev->pdev->dev;
+	i2c_set_adapdata(&connector->adapter, connector);
+	connector->adapter.algo_data = &connector->bit_data;
+
+	connector->bit_data.udelay = 20;
+	connector->bit_data.timeout = usecs_to_jiffies(2000);
+	connector->bit_data.data = connector;
+	connector->bit_data.setsda = hibmc_ddc_setsda;
+	connector->bit_data.setscl = hibmc_ddc_setscl;
+	connector->bit_data.getsda = hibmc_ddc_getsda;
+	connector->bit_data.getscl = hibmc_ddc_getscl;
+
+	return i2c_bit_add_bus(&connector->adapter);
+}
-- 
2.7.4

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[PATCH drm/hisilicon v3 2/2] drm/hisilicon: Features to support reading resolutions from EDID

[Tian Tao]

Use drm_get_edid to get the resolution, if that fails, set it to
a fixed resolution. Rewrite the desrtoy callback function to release
resources.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c | 38 +++++++++++++++++++++---
 1 file changed, 34 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
index 376a05d..c6999ed 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
@@ -21,12 +21,24 @@
 static int hibmc_connector_get_modes(struct drm_connector *connector)
 {
 	int count;
+	void *edid;
+	struct hibmc_connector *hibmc_connector = to_hibmc_connector(connector);
+
+	edid = drm_get_edid(connector, &hibmc_connector->adapter);
+	if (edid) {
+		drm_connector_update_edid_property(connector, edid);
+		count = drm_add_edid_modes(connector, edid);
+		if (count)
+			goto out;
+	}
 
 	count = drm_add_modes_noedid(connector,
 				     connector->dev->mode_config.max_width,
 				     connector->dev->mode_config.max_height);
 	drm_set_preferred_mode(connector, 1024, 768);
 
+out:
+	kfree(edid);
 	return count;
 }
 
@@ -36,6 +48,14 @@ static enum drm_mode_status hibmc_connector_mode_valid(struct drm_connector *con
 	return MODE_OK;
 }
 
+static void hibmc_connector_destroy(struct drm_connector *connector)
+{
+	struct hibmc_connector *hibmc_connector = to_hibmc_connector(connector);
+
+	i2c_del_adapter(&hibmc_connector->adapter);
+	drm_connector_cleanup(connector);
+}
+
 static const struct drm_connector_helper_funcs
 	hibmc_connector_helper_funcs = {
 	.get_modes = hibmc_connector_get_modes,
@@ -44,7 +64,7 @@ static const struct drm_connector_helper_funcs
 
 static const struct drm_connector_funcs hibmc_connector_funcs = {
 	.fill_modes = drm_helper_probe_single_connector_modes,
-	.destroy = drm_connector_cleanup,
+	.destroy = hibmc_connector_destroy,
 	.reset = drm_atomic_helper_connector_reset,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
@@ -77,10 +97,17 @@ static const struct drm_encoder_funcs hibmc_encoder_funcs = {
 int hibmc_vdac_init(struct hibmc_drm_private *priv)
 {
 	struct drm_device *dev = priv->dev;
+	struct hibmc_connector *hibmc_connector = &priv->connector;
 	struct drm_encoder *encoder = &priv->encoder;
-	struct drm_connector *connector = &priv->connector;
+	struct drm_connector *connector = &hibmc_connector->base;
 	int ret;
 
+	ret = hibmc_ddc_create(dev, hibmc_connector);
+	if (ret) {
+		drm_err(dev, "failed to create ddc: %d\n", ret);
+		return ret;
+	}
+
 	encoder->possible_crtcs = 0x1;
 	ret = drm_encoder_init(dev, encoder, &hibmc_encoder_funcs,
 			       DRM_MODE_ENCODER_DAC, NULL);
@@ -91,12 +118,15 @@ int hibmc_vdac_init(struct hibmc_drm_private *priv)
 
 	drm_encoder_helper_add(encoder, &hibmc_encoder_helper_funcs);
 
-	ret = drm_connector_init(dev, connector, &hibmc_connector_funcs,
-				 DRM_MODE_CONNECTOR_VGA);
+	ret = drm_connector_init_with_ddc(dev, connector,
+					  &hibmc_connector_funcs,
+					  DRM_MODE_CONNECTOR_VGA,
+					  &hibmc_connector->adapter);
 	if (ret) {
 		drm_err(dev, "failed to init connector: %d\n", ret);
 		return ret;
 	}
+
 	drm_connector_helper_add(connector, &hibmc_connector_helper_funcs);
 
 	drm_connector_attach_encoder(connector, encoder);
-- 
2.7.4

[PATCH drm/hisilicon v3 2/2] drm/hisilicon: Features to support reading resolutions from EDID

[Tian Tao]

Use drm_get_edid to get the resolution, if that fails, set it to
a fixed resolution. Rewrite the desrtoy callback function to release
resources.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c | 38 +++++++++++++++++++++---
 1 file changed, 34 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
index 376a05d..c6999ed 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
@@ -21,12 +21,24 @@
 static int hibmc_connector_get_modes(struct drm_connector *connector)
 {
 	int count;
+	void *edid;
+	struct hibmc_connector *hibmc_connector = to_hibmc_connector(connector);
+
+	edid = drm_get_edid(connector, &hibmc_connector->adapter);
+	if (edid) {
+		drm_connector_update_edid_property(connector, edid);
+		count = drm_add_edid_modes(connector, edid);
+		if (count)
+			goto out;
+	}
 
 	count = drm_add_modes_noedid(connector,
 				     connector->dev->mode_config.max_width,
 				     connector->dev->mode_config.max_height);
 	drm_set_preferred_mode(connector, 1024, 768);
 
+out:
+	kfree(edid);
 	return count;
 }
 
@@ -36,6 +48,14 @@ static enum drm_mode_status hibmc_connector_mode_valid(struct drm_connector *con
 	return MODE_OK;
 }
 
+static void hibmc_connector_destroy(struct drm_connector *connector)
+{
+	struct hibmc_connector *hibmc_connector = to_hibmc_connector(connector);
+
+	i2c_del_adapter(&hibmc_connector->adapter);
+	drm_connector_cleanup(connector);
+}
+
 static const struct drm_connector_helper_funcs
 	hibmc_connector_helper_funcs = {
 	.get_modes = hibmc_connector_get_modes,
@@ -44,7 +64,7 @@ static const struct drm_connector_helper_funcs
 
 static const struct drm_connector_funcs hibmc_connector_funcs = {
 	.fill_modes = drm_helper_probe_single_connector_modes,
-	.destroy = drm_connector_cleanup,
+	.destroy = hibmc_connector_destroy,
 	.reset = drm_atomic_helper_connector_reset,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
@@ -77,10 +97,17 @@ static const struct drm_encoder_funcs hibmc_encoder_funcs = {
 int hibmc_vdac_init(struct hibmc_drm_private *priv)
 {
 	struct drm_device *dev = priv->dev;
+	struct hibmc_connector *hibmc_connector = &priv->connector;
 	struct drm_encoder *encoder = &priv->encoder;
-	struct drm_connector *connector = &priv->connector;
+	struct drm_connector *connector = &hibmc_connector->base;
 	int ret;
 
+	ret = hibmc_ddc_create(dev, hibmc_connector);
+	if (ret) {
+		drm_err(dev, "failed to create ddc: %d\n", ret);
+		return ret;
+	}
+
 	encoder->possible_crtcs = 0x1;
 	ret = drm_encoder_init(dev, encoder, &hibmc_encoder_funcs,
 			       DRM_MODE_ENCODER_DAC, NULL);
@@ -91,12 +118,15 @@ int hibmc_vdac_init(struct hibmc_drm_private *priv)
 
 	drm_encoder_helper_add(encoder, &hibmc_encoder_helper_funcs);
 
-	ret = drm_connector_init(dev, connector, &hibmc_connector_funcs,
-				 DRM_MODE_CONNECTOR_VGA);
+	ret = drm_connector_init_with_ddc(dev, connector,
+					  &hibmc_connector_funcs,
+					  DRM_MODE_CONNECTOR_VGA,
+					  &hibmc_connector->adapter);
 	if (ret) {
 		drm_err(dev, "failed to init connector: %d\n", ret);
 		return ret;
 	}
+
 	drm_connector_helper_add(connector, &hibmc_connector_helper_funcs);
 
 	drm_connector_attach_encoder(connector, encoder);
-- 
2.7.4

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[PATCH drm/hisilicon v3 0/2] support reading resolutions from EDID

[Tian Tao]

patch #1 add a new file to implements i2c adapters, #2 read the
resolution from the edid, if that fails, set the resolution to fixed.
and update the destroy callback function to release the i2c adapters

Changes since v1:
-merge patch #3 into patch #2.
-add new function to_hibmc_drm_private, modify three functions in
hibmc_drm_i2c.c with the newly added function.
-deleting the member variable dev from the structure hibmc_connector.
-modify print log incorrectly.
-Modify hibmc_connector_get_modes.

Changes since v2:
-rewrite the funtion to_hibmc_drm_private, and rename GPIO_SCL_MASK
to I2C_SCL_MASK

Tian Tao (2):
  drm/hisilicon: Support i2c driver algorithms for bit-shift adapters
  drm/hisilicon: Features to support reading resolutions from EDID

 drivers/gpu/drm/hisilicon/hibmc/Makefile         |  2 +-
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h  | 25 +++++-
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c  | 99 ++++++++++++++++++++++++
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c | 38 ++++++++-
 4 files changed, 158 insertions(+), 6 deletions(-)
 create mode 100644 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c

-- 
2.7.4

[PATCH drm/hisilicon v3 0/2] support reading resolutions from EDID

[Tian Tao]

patch #1 add a new file to implements i2c adapters, #2 read the
resolution from the edid, if that fails, set the resolution to fixed.
and update the destroy callback function to release the i2c adapters

Changes since v1:
-merge patch #3 into patch #2.
-add new function to_hibmc_drm_private, modify three functions in
hibmc_drm_i2c.c with the newly added function.
-deleting the member variable dev from the structure hibmc_connector.
-modify print log incorrectly.
-Modify hibmc_connector_get_modes.

Changes since v2:
-rewrite the funtion to_hibmc_drm_private, and rename GPIO_SCL_MASK
to I2C_SCL_MASK

Tian Tao (2):
  drm/hisilicon: Support i2c driver algorithms for bit-shift adapters
  drm/hisilicon: Features to support reading resolutions from EDID

 drivers/gpu/drm/hisilicon/hibmc/Makefile         |  2 +-
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h  | 25 +++++-
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c  | 99 ++++++++++++++++++++++++
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c | 38 ++++++++-
 4 files changed, 158 insertions(+), 6 deletions(-)
 create mode 100644 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_i2c.c

-- 
2.7.4

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