[PATCH V9 04/14] drm/bridge: ptn3460: Convert to i2c driver model
Ajay Kumar
ajaykumar.rs at samsung.com
Tue Jan 20 08:38:45 PST 2015
Use drm_bridge helpers to modify the driver to support
i2c driver model.
Signed-off-by: Ajay Kumar <ajaykumar.rs at samsung.com>
Acked-by: Inki Dae <inki.dae at samsung.com>
Tested-by: Rahul Sharma <rahul.sharma at samsung.com>
Tested-by: Javier Martinez Canillas <javier.martinez at collabora.co.uk>
Tested-by: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
Tested-by: Sjoerd Simons <sjoerd.simons at collabora.co.uk>
---
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 at 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 34d46aa..27e3d27 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;
}
--
1.7.9.5
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