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 --- 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(-)

diff --git a/drivers/gpu/drm/bridge/ptn3460.c b/drivers/gpu/drm/bridge/ptn3460.c index 4db38e1..a2ddc8d 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 e79c8d3..408c053 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -1011,7 +1011,6 @@ 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. @@ -1019,8 +1018,7 @@ 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;

@@ -1031,7 +1029,6 @@ 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 f6cf745..0309539 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c @@ -221,8 +221,9 @@ struct drm_bridge *hdmi_bridge_init(struct hdmi *hdmi) hdmi_bridge->hdmi = hdmi_reference(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 2ae9a9b..6cf145d 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 b22968c..285f723 100644 --- a/drivers/gpu/drm/sti/sti_hdmi.c +++ b/drivers/gpu/drm/sti/sti_hdmi.c @@ -628,7 +628,8 @@ static int sti_hdmi_bind(struct device *dev, struct device *master, void *data) return -ENOMEM;

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 c40070a..5a3bce17 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -912,8 +912,7 @@ 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,

Use drm_bridge helpers to modify the driver to support i2c driver model.

Signed-off-by: Ajay Kumar ajaykumar.rs@samsung.com --- drivers/gpu/drm/bridge/Kconfig | 2 + drivers/gpu/drm/bridge/ptn3460.c | 124 +++++++++++++++++++++---------- drivers/gpu/drm/exynos/exynos_dp_core.c | 22 ------ 3 files changed, 86 insertions(+), 62 deletions(-)

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index 884923f..4254c2b 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -1,5 +1,7 @@ config DRM_PTN3460 tristate "PTN3460 DP/LVDS bridge" depends on DRM + depends on OF && I2C 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 4a818c1..7adeb60 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 6adb1e5..5025b70 100644 --- a/drivers/gpu/drm/exynos/exynos_dp_core.c +++ b/drivers/gpu/drm/exynos/exynos_dp_core.c @@ -988,32 +988,10 @@ 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; }

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 --- .../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(+)

diff --git a/Documentation/devicetree/bindings/drm/bridge/ptn3460.txt b/Documentation/devicetree/bindings/drm/bridge/ptn3460.txt index 52b93b2..663fe6c 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 4254c2b..8b426e2 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -3,5 +3,6 @@ config DRM_PTN3460 depends on DRM depends on OF && I2C 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 7adeb60..e6d5ae7 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");

Modify driver to support gpiod interface.

Signed-off-by: Ajay Kumar ajaykumar.rs@samsung.com --- drivers/gpu/drm/bridge/ptn3460.c | 88 ++++++++++++++++---------------------- 1 file changed, 36 insertions(+), 52 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ptn3460.c b/drivers/gpu/drm/bridge/ptn3460.c index 9f800a1..826833e 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; }

ps8622 eDP-LVDS converter bridge chip is from parade technologies

Signed-off-by: Ajay Kumar ajaykumar.rs@samsung.com --- .../devicetree/bindings/vendor-prefixes.txt | 1 + 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt index 723999d..0be1508 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.txt +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt @@ -110,6 +110,7 @@ nxp NXP Semiconductors onnn ON Semiconductor Corp. opencores OpenCores.org panasonic Panasonic Corporation +parade Parade Technologies Inc. phytec PHYTEC Messtechnik GmbH picochip Picochip Ltd plathome Plat'Home Co., Ltd.

From: Vincent Palatin vpalatin@chromium.org

This patch adds drm_bridge driver for parade DisplayPort to LVDS bridge chip.

Signed-off-by: Vincent Palatin vpalatin@chromium.org Signed-off-by: Andrew Bresticker abrestic@chromium.org Signed-off-by: Sean Paul seanpaul@chromium.org Signed-off-by: Rahul Sharma rahul.sharma@samsung.com Signed-off-by: Ajay Kumar ajaykumar.rs@samsung.com --- drivers/gpu/drm/bridge/Kconfig | 9 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/ps8622.c | 684 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 694 insertions(+) create mode 100644 drivers/gpu/drm/bridge/ps8622.c

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index 8b426e2..d06eda3 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -6,3 +6,12 @@ config DRM_PTN3460 select DRM_PANEL ---help--- ptn3460 eDP-LVDS bridge chip driver. + +config DRM_PS8622 + tristate "Parade eDP/LVDS bridge" + depends on OF && I2C + select DRM_PANEL + select BACKLIGHT_LCD_SUPPORT + select BACKLIGHT_CLASS_DEVICE + ---help--- + parade eDP-LVDS bridge chip driver. diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index b4733e1..105da3e 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -1,3 +1,4 @@ ccflags-y := -Iinclude/drm

+obj-$(CONFIG_DRM_PS8622) += ps8622.o obj-$(CONFIG_DRM_PTN3460) += ptn3460.o diff --git a/drivers/gpu/drm/bridge/ps8622.c b/drivers/gpu/drm/bridge/ps8622.c new file mode 100644 index 0000000..5474a39 --- /dev/null +++ b/drivers/gpu/drm/bridge/ps8622.c @@ -0,0 +1,684 @@ +/* + * Parade PS8622 eDP/LVDS bridge driver + * + * Copyright (C) 2014 Google, Inc. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/fb.h> +#include <linux/gpio.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_graph.h> +#include <linux/pm.h> +#include <linux/regulator/consumer.h> + +#include <drm/drm_panel.h> + +#include "drmP.h" +#include "drm_crtc.h" +#include "drm_crtc_helper.h" + +/* Brightness scale on the Parade chip */ +#define PS8622_MAX_BRIGHTNESS 0xff + +/* Timings taken from the version 1.7 datasheet for the PS8622/PS8625 */ +#define PS8622_POWER_RISE_T1_MIN_US 10 +#define PS8622_POWER_RISE_T1_MAX_US 10000 +#define PS8622_RST_HIGH_T2_MIN_US 3000 +#define PS8622_RST_HIGH_T2_MAX_US 30000 +#define PS8622_PWMO_END_T12_MS 200 +#define PS8622_POWER_FALL_T16_MAX_US 10000 +#define PS8622_POWER_OFF_T17_MS 500 + +#if ((PS8622_RST_HIGH_T2_MIN_US + PS8622_POWER_RISE_T1_MAX_US) > \ + (PS8622_RST_HIGH_T2_MAX_US + PS8622_POWER_RISE_T1_MIN_US)) +#error "T2.min + T1.max must be less than T2.max + T1.min" +#endif + +struct ps8622_bridge { + struct drm_connector connector; + struct i2c_client *client; + struct drm_bridge bridge; + struct drm_panel *panel; + struct regulator *v12; + struct backlight_device *bl; + + struct gpio_desc *gpio_slp; + struct gpio_desc *gpio_rst; + + u32 max_lane_count; + u32 lane_count; + + bool enabled; +}; + +static inline struct ps8622_bridge * + bridge_to_ps8622(struct drm_bridge *bridge) +{ + return container_of(bridge, struct ps8622_bridge, bridge); +} + +static inline struct ps8622_bridge * + connector_to_ps8622(struct drm_connector *connector) +{ + return container_of(connector, struct ps8622_bridge, connector); +} + +static int ps8622_set(struct i2c_client *client, u8 page, u8 reg, u8 val) +{ + int ret; + struct i2c_adapter *adap = client->adapter; + struct i2c_msg msg; + u8 data[] = {reg, val}; + + msg.addr = client->addr + page; + msg.flags = 0; + msg.len = sizeof(data); + msg.buf = data; + + ret = i2c_transfer(adap, &msg, 1); + if (ret != 1) + pr_warn("PS8622 I2C write (0x%02x,0x%02x,0x%02x) failed: %d\n", + client->addr + page, reg, val, ret); + return !(ret == 1); +} + +static int ps8622_send_config(struct ps8622_bridge *ps8622) +{ + struct i2c_client *cl = ps8622->client; + int err = 0; + + /* HPD low */ + err = ps8622_set(cl, 0x02, 0xa1, 0x01); + if (err) + goto error; + + /* SW setting: [1:0] SW output 1.2V voltage is lower to 96% */ + err = ps8622_set(cl, 0x04, 0x14, 0x01); + if (err) + goto error; + + /* RCO SS setting: [5:4] = b01 0.5%, b10 1%, b11 1.5% */ + err = ps8622_set(cl, 0x04, 0xe3, 0x20); + if (err) + goto error; + + /* [7] RCO SS enable */ + err = ps8622_set(cl, 0x04, 0xe2, 0x80); + if (err) + goto error; + + /* RPHY Setting + * [3:2] CDR tune wait cycle before measure for fine tune + * b00: 1us b01: 0.5us b10:2us, b11: 4us + */ + err = ps8622_set(cl, 0x04, 0x8a, 0x0c); + if (err) + goto error; + + /* [3] RFD always on */ + err = ps8622_set(cl, 0x04, 0x89, 0x08); + if (err) + goto error; + + /* CTN lock in/out: 20000ppm/80000ppm. Lock out 2 times. */ + err = ps8622_set(cl, 0x04, 0x71, 0x2d); + if (err) + goto error; + + /* 2.7G CDR settings: NOF=40LSB for HBR CDR setting */ + err = ps8622_set(cl, 0x04, 0x7d, 0x07); + if (err) + goto error; + + /* [1:0] Fmin=+4bands */ + err = ps8622_set(cl, 0x04, 0x7b, 0x00); + if (err) + goto error; + + /* [7:5] DCO_FTRNG=+-40% */ + err = ps8622_set(cl, 0x04, 0x7a, 0xfd); + if (err) + goto error; + + /* 1.62G CDR settings: [5:2]NOF=64LSB [1:0]DCO scale is 2/5 */ + err = ps8622_set(cl, 0x04, 0xc0, 0x12); + if (err) + goto error; + + /* Gitune=-37% */ + err = ps8622_set(cl, 0x04, 0xc1, 0x92); + if (err) + goto error; + + /* Fbstep=100% */ + err = ps8622_set(cl, 0x04, 0xc2, 0x1c); + if (err) + goto error; + + /* [7] LOS signal disable */ + err = ps8622_set(cl, 0x04, 0x32, 0x80); + if (err) + goto error; + + /* RPIO Setting: [7:4] LVDS driver bias current : 75% (250mV swing) */ + err = ps8622_set(cl, 0x04, 0x00, 0xb0); + if (err) + goto error; + + /* [7:6] Right-bar GPIO output strength is 8mA */ + err = ps8622_set(cl, 0x04, 0x15, 0x40); + if (err) + goto error; + + /* EQ Training State Machine Setting, RCO calibration start */ + err = ps8622_set(cl, 0x04, 0x54, 0x10); + if (err) + goto error; + + /* Logic, needs more than 10 I2C command */ + /* [4:0] MAX_LANE_COUNT set to max supported lanes */ + err = ps8622_set(cl, 0x01, 0x02, 0x80 | ps8622->max_lane_count); + if (err) + goto error; + + /* [4:0] LANE_COUNT_SET set to chosen lane count */ + err = ps8622_set(cl, 0x01, 0x21, 0x80 | ps8622->lane_count); + if (err) + goto error; + + err = ps8622_set(cl, 0x00, 0x52, 0x20); + if (err) + goto error; + + /* HPD CP toggle enable */ + err = ps8622_set(cl, 0x00, 0xf1, 0x03); + if (err) + goto error; + + err = ps8622_set(cl, 0x00, 0x62, 0x41); + if (err) + goto error; + + /* Counter number, add 1ms counter delay */ + err = ps8622_set(cl, 0x00, 0xf6, 0x01); + if (err) + goto error; + + /* [6]PWM function control by DPCD0040f[7], default is PWM block */ + err = ps8622_set(cl, 0x00, 0x77, 0x06); + if (err) + goto error; + + /* 04h Adjust VTotal toleranceto fix the 30Hz no display issue */ + err = ps8622_set(cl, 0x00, 0x4c, 0x04); + if (err) + goto error; + + /* DPCD00400='h00, Parade OUI ='h001cf8 */ + err = ps8622_set(cl, 0x01, 0xc0, 0x00); + if (err) + goto error; + + /* DPCD00401='h1c */ + err = ps8622_set(cl, 0x01, 0xc1, 0x1c); + if (err) + goto error; + + /* DPCD00402='hf8 */ + err = ps8622_set(cl, 0x01, 0xc2, 0xf8); + if (err) + goto error; + + /* DPCD403~408 = ASCII code, D2SLV5='h4432534c5635 */ + err = ps8622_set(cl, 0x01, 0xc3, 0x44); + if (err) + goto error; + + /* DPCD404 */ + err = ps8622_set(cl, 0x01, 0xc4, 0x32); + if (err) + goto error; + + /* DPCD405 */ + err = ps8622_set(cl, 0x01, 0xc5, 0x53); + if (err) + goto error; + + /* DPCD406 */ + err = ps8622_set(cl, 0x01, 0xc6, 0x4c); + if (err) + goto error; + + /* DPCD407 */ + err = ps8622_set(cl, 0x01, 0xc7, 0x56); + if (err) + goto error; + + /* DPCD408 */ + err = ps8622_set(cl, 0x01, 0xc8, 0x35); + if (err) + goto error; + + /* DPCD40A, Initial Code major revision '01' */ + err = ps8622_set(cl, 0x01, 0xca, 0x01); + if (err) + goto error; + + /* DPCD40B, Initial Code minor revision '05' */ + err = ps8622_set(cl, 0x01, 0xcb, 0x05); + if (err) + goto error; + + + if (ps8622->bl) { + /* DPCD720, internal PWM */ + err = ps8622_set(cl, 0x01, 0xa5, 0xa0); + if (err) + goto error; + + /* FFh for 100% brightness, 0h for 0% brightness */ + err = ps8622_set(cl, 0x01, 0xa7, + ps8622->bl->props.brightness); + if (err) + goto error; + } else { + /* DPCD720, external PWM */ + err = ps8622_set(cl, 0x01, 0xa5, 0x80); + if (err) + goto error; + } + + /* Set LVDS output as 6bit-VESA mapping, single LVDS channel */ + err = ps8622_set(cl, 0x01, 0xcc, 0x13); + if (err) + goto error; + + /* Enable SSC set by register */ + err = ps8622_set(cl, 0x02, 0xb1, 0x20); + if (err) + goto error; + + /* Set SSC enabled and +/-1% central spreading */ + err = ps8622_set(cl, 0x04, 0x10, 0x16); + if (err) + goto error; + + /* Logic end */ + /* MPU Clock source: LC => RCO */ + err = ps8622_set(cl, 0x04, 0x59, 0x60); + if (err) + goto error; + + /* LC -> RCO */ + err = ps8622_set(cl, 0x04, 0x54, 0x14); + if (err) + goto error; + + /* HPD high */ + err = ps8622_set(cl, 0x02, 0xa1, 0x91); + +error: + return err ? -EIO : 0; +} + +static int ps8622_backlight_update(struct backlight_device *bl) +{ + struct ps8622_bridge *ps8622 = dev_get_drvdata(&bl->dev); + int ret, brightness = bl->props.brightness; + + if (bl->props.power != FB_BLANK_UNBLANK || + bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK)) + brightness = 0; + + if (!ps8622->enabled) + return -EINVAL; + + ret = ps8622_set(ps8622->client, 0x01, 0xa7, brightness); + + return ret; +} + +static const struct backlight_ops ps8622_backlight_ops = { + .update_status = ps8622_backlight_update, +}; + +static void ps8622_pre_enable(struct drm_bridge *bridge) +{ + struct ps8622_bridge *ps8622 = bridge_to_ps8622(bridge); + int ret; + + if (ps8622->enabled) + return; + + gpiod_set_value(ps8622->gpio_rst, 0); + + if (ps8622->v12) { + ret = regulator_enable(ps8622->v12); + if (ret) + DRM_ERROR("fails to enable ps8622->v12"); + } + + if (drm_panel_prepare(ps8622->panel)) { + DRM_ERROR("failed to prepare panel\n"); + return; + } + + gpiod_set_value(ps8622->gpio_slp, 1); + + /* + * T1 is the range of time that it takes for the power to rise after we + * enable the lcd/ps8622 fet. T2 is the range of time in which the + * data sheet specifies we should deassert the reset pin. + * + * If it takes T1.max for the power to rise, we need to wait atleast + * T2.min before deasserting the reset pin. If it takes T1.min for the + * power to rise, we need to wait at most T2.max before deasserting the + * reset pin. + */ + usleep_range(PS8622_RST_HIGH_T2_MIN_US + PS8622_POWER_RISE_T1_MAX_US, + PS8622_RST_HIGH_T2_MAX_US + PS8622_POWER_RISE_T1_MIN_US); + + gpiod_set_value(ps8622->gpio_rst, 1); + + /* wait 20ms after RST high */ + usleep_range(20000, 30000); + + ret = ps8622_send_config(ps8622); + if (ret) { + DRM_ERROR("Failed to send config to bridge (%d)\n", ret); + return; + } + + ps8622->enabled = true; +} + +static void ps8622_enable(struct drm_bridge *bridge) +{ + struct ps8622_bridge *ps8622 = bridge_to_ps8622(bridge); + + if (drm_panel_enable(ps8622->panel)) { + DRM_ERROR("failed to enable panel\n"); + return; + } +} + +static void ps8622_disable(struct drm_bridge *bridge) +{ + struct ps8622_bridge *ps8622 = bridge_to_ps8622(bridge); + + if (drm_panel_disable(ps8622->panel)) { + DRM_ERROR("failed to disable panel\n"); + return; + } + msleep(PS8622_PWMO_END_T12_MS); +} + +static void ps8622_post_disable(struct drm_bridge *bridge) +{ + struct ps8622_bridge *ps8622 = bridge_to_ps8622(bridge); + + if (!ps8622->enabled) + return; + + ps8622->enabled = false; + + /* + * This doesn't matter if the regulators are turned off, but something + * else might keep them on. In that case, we want to assert the slp gpio + * to lower power. + */ + gpiod_set_value(ps8622->gpio_slp, 0); + + if (drm_panel_unprepare(ps8622->panel)) { + DRM_ERROR("failed to unprepare panel\n"); + return; + } + + if (ps8622->v12) + regulator_disable(ps8622->v12); + + /* + * Sleep for at least the amount of time that it takes the power rail to + * fall to prevent asserting the rst gpio from doing anything. + */ + usleep_range(PS8622_POWER_FALL_T16_MAX_US, + 2 * PS8622_POWER_FALL_T16_MAX_US); + gpiod_set_value(ps8622->gpio_rst, 0); + + msleep(PS8622_POWER_OFF_T17_MS); +} + +static int ps8622_get_modes(struct drm_connector *connector) +{ + struct ps8622_bridge *ps8622; + + ps8622 = connector_to_ps8622(connector); + + return drm_panel_get_modes(ps8622->panel); +} + +static struct drm_encoder *ps8622_best_encoder(struct drm_connector *connector) +{ + struct ps8622_bridge *ps8622; + + ps8622 = connector_to_ps8622(connector); + + return ps8622->bridge.encoder; +} + +static const struct drm_connector_helper_funcs ps8622_connector_helper_funcs = { + .get_modes = ps8622_get_modes, + .best_encoder = ps8622_best_encoder, +}; + +static enum drm_connector_status ps8622_detect(struct drm_connector *connector, + bool force) +{ + return connector_status_connected; +} + +static void ps8622_connector_destroy(struct drm_connector *connector) +{ + drm_connector_cleanup(connector); +} + +static const struct drm_connector_funcs ps8622_connector_funcs = { + .dpms = drm_helper_connector_dpms, + .fill_modes = drm_helper_probe_single_connector_modes, + .detect = ps8622_detect, + .destroy = ps8622_connector_destroy, +}; + +int ps8622_attach(struct drm_bridge *bridge) +{ + struct ps8622_bridge *ps8622 = bridge_to_ps8622(bridge); + int ret; + + if (!bridge->encoder) { + DRM_ERROR("Parent encoder object not found"); + return -ENODEV; + } + + ps8622->connector.polled = DRM_CONNECTOR_POLL_HPD; + ret = drm_connector_init(bridge->dev, &ps8622->connector, + &ps8622_connector_funcs, DRM_MODE_CONNECTOR_LVDS); + if (ret) { + DRM_ERROR("Failed to initialize connector with drm\n"); + return ret; + } + drm_connector_helper_add(&ps8622->connector, + &ps8622_connector_helper_funcs); + drm_connector_register(&ps8622->connector); + drm_mode_connector_attach_encoder(&ps8622->connector, + bridge->encoder); + + if (ps8622->panel) + drm_panel_attach(ps8622->panel, &ps8622->connector); + + drm_helper_hpd_irq_event(ps8622->connector.dev); + + return ret; +} + +static const struct drm_bridge_funcs ps8622_bridge_funcs = { + .pre_enable = ps8622_pre_enable, + .enable = ps8622_enable, + .disable = ps8622_disable, + .post_disable = ps8622_post_disable, + .attach = ps8622_attach, +}; + +static const struct of_device_id ps8622_devices[] = { + {.compatible = "parade,ps8622",}, + {.compatible = "parade,ps8625",}, + {} +}; +MODULE_DEVICE_TABLE(of, ps8622_devices); + +static int ps8622_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct device_node *endpoint, *panel_node; + struct ps8622_bridge *ps8622; + int ret; + + ps8622 = devm_kzalloc(dev, sizeof(*ps8622), GFP_KERNEL); + if (!ps8622) + 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) { + ps8622->panel = of_drm_find_panel(panel_node); + of_node_put(panel_node); + if (!ps8622->panel) + return -EPROBE_DEFER; + } + } + + ps8622->client = client; + + ps8622->v12 = devm_regulator_get(dev, "vdd12"); + if (IS_ERR(ps8622->v12)) { + dev_info(dev, "no 1.2v regulator found for PS8622\n"); + ps8622->v12 = NULL; + } + + ps8622->gpio_slp = devm_gpiod_get(dev, "sleep"); + if (IS_ERR(ps8622->gpio_slp)) { + ret = PTR_ERR(ps8622->gpio_slp); + dev_err(dev, "cannot get gpio_slp %d\n", ret); + return ret; + } + ret = gpiod_direction_output(ps8622->gpio_slp, 1); + if (ret) { + dev_err(dev, "cannot configure gpio_slp\n"); + return ret; + } + + ps8622->gpio_rst = devm_gpiod_get(dev, "reset"); + if (IS_ERR(ps8622->gpio_rst)) { + ret = PTR_ERR(ps8622->gpio_rst); + dev_err(dev, "cannot get gpio_rst %d\n", ret); + return ret; + } + /* + * Assert the reset pin high to avoid the bridge being + * initialized prematurely + */ + ret = gpiod_direction_output(ps8622->gpio_rst, 1); + if (ret) { + dev_err(dev, "cannot configure gpio_rst\n"); + return ret; + } + + ps8622->max_lane_count = id->driver_data; + + if (of_property_read_u32(dev->of_node, "lane-count", + &ps8622->lane_count)) { + ps8622->lane_count = ps8622->max_lane_count; + } else if (ps8622->lane_count > ps8622->max_lane_count) { + dev_info(dev, "lane-count property is too high," + "using max_lane_count\n"); + ps8622->lane_count = ps8622->max_lane_count; + } + + if (!of_find_property(dev->of_node, "use-external-pwm", NULL)) { + ps8622->bl = backlight_device_register("ps8622-backlight", + dev, ps8622, &ps8622_backlight_ops, + NULL); + if (IS_ERR(ps8622->bl)) { + DRM_ERROR("failed to register backlight\n"); + ret = PTR_ERR(ps8622->bl); + ps8622->bl = NULL; + return ret; + } + ps8622->bl->props.max_brightness = PS8622_MAX_BRIGHTNESS; + ps8622->bl->props.brightness = PS8622_MAX_BRIGHTNESS; + } + + ps8622->bridge.funcs = &ps8622_bridge_funcs; + ps8622->bridge.of_node = dev->of_node; + ret = drm_bridge_add(&ps8622->bridge); + if (ret) { + DRM_ERROR("Failed to add bridge\n"); + return ret; + } + + i2c_set_clientdata(client, ps8622); + + return 0; +} + +static int ps8622_remove(struct i2c_client *client) +{ + struct ps8622_bridge *ps8622 = i2c_get_clientdata(client); + + if (ps8622->bl) + backlight_device_unregister(ps8622->bl); + + drm_bridge_remove(&ps8622->bridge); + + return 0; +} + +static const struct i2c_device_id ps8622_i2c_table[] = { + /* Device type, max_lane_count */ + {"ps8622", 1}, + {"ps8625", 2}, + {}, +}; +MODULE_DEVICE_TABLE(i2c, ps8622_i2c_table); + +struct i2c_driver ps8622_driver = { + .id_table = ps8622_i2c_table, + .probe = ps8622_probe, + .remove = ps8622_remove, + .driver = { + .name = "ps8622", + .owner = THIS_MODULE, + .of_match_table = ps8622_devices, + }, +}; +module_i2c_driver(ps8622_driver); + +MODULE_AUTHOR("Vincent Palatin vpalatin@chromium.org"); +MODULE_DESCRIPTION("Parade ps8622/ps8625 eDP-LVDS converter driver"); +MODULE_LICENSE("GPL v2");

Define videoports and use endpoints to describe the connection between the encoder, bridge and the panel, instead of using phandles.

Signed-off-by: Ajay Kumar ajaykumar.rs@samsung.com --- arch/arm/boot/dts/exynos5420-peach-pit.dts | 31 ++++++++++++++++++++++++++-- 1 file changed, 29 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/exynos5420-peach-pit.dts b/arch/arm/boot/dts/exynos5420-peach-pit.dts index 82cdb74..9d06aef 100644 --- a/arch/arm/boot/dts/exynos5420-peach-pit.dts +++ b/arch/arm/boot/dts/exynos5420-peach-pit.dts @@ -107,6 +107,12 @@ compatible = "auo,b116xw03"; power-supply = <&tps65090_fet6>; backlight = <&backlight>; + + port { + panel_in: endpoint { + remote-endpoint = <&bridge_out>; + }; + }; }; };

@@ -126,7 +132,14 @@ samsung,link-rate = <0x06>; samsung,lane-count = <2>; samsung,hpd-gpio = <&gpx2 6 0>; - bridge = <&ps8625>; + + ports { + port@0 { + dp_out: endpoint { + remote-endpoint = <&bridge_in>; + }; + }; + }; };

&fimd { @@ -504,8 +517,22 @@ sleep-gpios = <&gpx3 5 GPIO_ACTIVE_HIGH>; reset-gpios = <&gpy7 7 GPIO_ACTIVE_HIGH>; lane-count = <2>; - panel = <&panel>; use-external-pwm; + + ports { + port@0 { + bridge_out: endpoint { + remote-endpoint = <&panel_in>; + }; + }; + + port@1 { + bridge_in: endpoint { + remote-endpoint = <&dp_out>; + }; + }; + }; + }; };