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@xxxxxxxxxxx>
---
drivers/gpu/drm/bridge/ptn3460.c | 95 +++++++++++++++++++-------------------
1 file changed, 48 insertions(+), 47 deletions(-)
diff --git a/drivers/gpu/drm/bridge/ptn3460.c b/drivers/gpu/drm/bridge/ptn3460.c
index d466696..4db38e1 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);
--
1.7.9.5
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