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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>
This commit is contained in:
Ajay Kumar 2015-01-20 22:08:45 +05:30 committed by Thierry Reding
parent 3d3f8b1f8b
commit 6a1688ae87
3 changed files with 93 additions and 69 deletions
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14
drivers/gpu/drm/bridge/Kconfig
View File

@ -1,10 +1,12 @@
config DRM_PTN3460
tristate "PTN3460 DP/LVDS bridge"
depends on DRM
select DRM_KMS_HELPER
---help---
config DRM_DW_HDMI
tristate
depends on DRM
select DRM_KMS_HELPER
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.

126
drivers/gpu/drm/bridge/ptn3460.c
View File

@ -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;
struct ptn3460_bridge *ptn_bridge;
ptn_bridge = devm_kzalloc(dev->dev, sizeof(*ptn_bridge), GFP_KERNEL);
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, 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");

22
drivers/gpu/drm/exynos/exynos_dp_core.c
View File

@ -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;
}