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drm/bridge: ptn3460: Few trivial cleanups

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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@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>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Ajay Kumar 2015-01-20 22:08:42 +05:30 committed by Thierry Reding
parent d47df63393
commit 94d50d57c4
1 changed files with 49 additions and 48 deletions
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97
drivers/gpu/drm/bridge/ptn3460.c
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@ -13,20 +13,20 @@
* GNU General Public License for more details. * 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/module.h>
#include <linux/of.h> #include <linux/of.h>
#include <linux/of_gpio.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 "drm_crtc.h"
#include "drm_crtc_helper.h"
#include "bridge/ptn3460.h" #include "bridge/ptn3460.h"
#include "drm_crtc.h"
#include "drm_crtc_helper.h"
#include "drm_edid.h"
#include "drmP.h"
#define PTN3460_EDID_ADDR 0x0 #define PTN3460_EDID_ADDR 0x0
#define PTN3460_EDID_EMULATION_ADDR 0x84 #define PTN3460_EDID_EMULATION_ADDR 0x84
#define PTN3460_EDID_ENABLE_EMULATION 0 #define PTN3460_EDID_ENABLE_EMULATION 0
@ -37,7 +37,7 @@ struct ptn3460_bridge {
struct drm_connector connector; struct drm_connector connector;
struct i2c_client *client; struct i2c_client *client;
struct drm_encoder *encoder; struct drm_encoder *encoder;
struct drm_bridge *bridge; struct drm_bridge bridge;
struct edid *edid; struct edid *edid;
int gpio_pd_n; int gpio_pd_n;
int gpio_rst_n; int gpio_rst_n;
@ -45,6 +45,18 @@ struct ptn3460_bridge {
bool enabled; 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, static int ptn3460_read_bytes(struct ptn3460_bridge *ptn_bridge, char addr,
u8 *buf, int len) 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, ret = ptn3460_write_byte(ptn_bridge, PTN3460_EDID_SRAM_LOAD_ADDR,
ptn_bridge->edid_emulation); ptn_bridge->edid_emulation);
if (ret) { 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; 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); ret = ptn3460_write_byte(ptn_bridge, PTN3460_EDID_EMULATION_ADDR, val);
if (ret) { 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; 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) 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; int ret;
if (ptn_bridge->enabled) 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)) { if (gpio_is_valid(ptn_bridge->gpio_rst_n)) {
gpio_set_value(ptn_bridge->gpio_rst_n, 0); gpio_set_value(ptn_bridge->gpio_rst_n, 0);
udelay(10); usleep_range(10, 20);
gpio_set_value(ptn_bridge->gpio_rst_n, 1); 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); ret = ptn3460_select_edid(ptn_bridge);
if (ret) if (ret)
DRM_ERROR("Select edid failed ret=%d\n", ret); DRM_ERROR("Select EDID failed ret=%d\n", ret);
ptn_bridge->enabled = true; ptn_bridge->enabled = true;
} }
@ -146,7 +158,7 @@ static void ptn3460_enable(struct drm_bridge *bridge)
static void ptn3460_disable(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) if (!ptn_bridge->enabled)
return; 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); drm_bridge_cleanup(bridge);
if (gpio_is_valid(ptn_bridge->gpio_pd_n)) 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 */ /* 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, .pre_enable = ptn3460_pre_enable,
.enable = ptn3460_enable, .enable = ptn3460_enable,
.disable = ptn3460_disable, .disable = ptn3460_disable,
@ -184,24 +196,24 @@ struct drm_bridge_funcs ptn3460_bridge_funcs = {
.destroy = ptn3460_bridge_destroy, .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; struct ptn3460_bridge *ptn_bridge;
u8 *edid; u8 *edid;
int ret, num_modes; int ret, num_modes = 0;
bool power_off; bool power_off;
ptn_bridge = container_of(connector, struct ptn3460_bridge, connector); ptn_bridge = connector_to_ptn3460(connector);
if (ptn_bridge->edid) if (ptn_bridge->edid)
return drm_add_edid_modes(connector, ptn_bridge->edid); return drm_add_edid_modes(connector, ptn_bridge->edid);
power_off = !ptn_bridge->enabled; power_off = !ptn_bridge->enabled;
ptn3460_pre_enable(ptn_bridge->bridge); ptn3460_pre_enable(&ptn_bridge->bridge);
edid = kmalloc(EDID_LENGTH, GFP_KERNEL); edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
if (!edid) { if (!edid) {
DRM_ERROR("Failed to allocate edid\n"); DRM_ERROR("Failed to allocate EDID\n");
return 0; return 0;
} }
@ -209,7 +221,6 @@ int ptn3460_get_modes(struct drm_connector *connector)
EDID_LENGTH); EDID_LENGTH);
if (ret) { if (ret) {
kfree(edid); kfree(edid);
num_modes = 0;
goto out; goto out;
} }
@ -220,37 +231,35 @@ int ptn3460_get_modes(struct drm_connector *connector)
out: out:
if (power_off) if (power_off)
ptn3460_disable(ptn_bridge->bridge); ptn3460_disable(&ptn_bridge->bridge);
return num_modes; 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; struct ptn3460_bridge *ptn_bridge = connector_to_ptn3460(connector);
ptn_bridge = container_of(connector, struct ptn3460_bridge, connector);
return ptn_bridge->encoder; 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, .get_modes = ptn3460_get_modes,
.best_encoder = ptn3460_best_encoder, .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) bool force)
{ {
return connector_status_connected; 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); drm_connector_cleanup(connector);
} }
struct drm_connector_funcs ptn3460_connector_funcs = { static struct drm_connector_funcs ptn3460_connector_funcs = {
.dpms = drm_helper_connector_dpms, .dpms = drm_helper_connector_dpms,
.fill_modes = drm_helper_probe_single_connector_modes, .fill_modes = drm_helper_probe_single_connector_modes,
.detect = ptn3460_detect, .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) struct i2c_client *client, struct device_node *node)
{ {
int ret; int ret;
struct drm_bridge *bridge;
struct ptn3460_bridge *ptn_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); ptn_bridge = devm_kzalloc(dev->dev, sizeof(*ptn_bridge), GFP_KERNEL);
if (!ptn_bridge) { if (!ptn_bridge) {
DRM_ERROR("Failed to allocate ptn bridge\n");
return -ENOMEM; return -ENOMEM;
} }
ptn_bridge->client = client; ptn_bridge->client = client;
ptn_bridge->encoder = encoder; ptn_bridge->encoder = encoder;
ptn_bridge->bridge = bridge;
ptn_bridge->gpio_pd_n = of_get_named_gpio(node, "powerdown-gpio", 0); ptn_bridge->gpio_pd_n = of_get_named_gpio(node, "powerdown-gpio", 0);
if (gpio_is_valid(ptn_bridge->gpio_pd_n)) { if (gpio_is_valid(ptn_bridge->gpio_pd_n)) {
ret = gpio_request_one(ptn_bridge->gpio_pd_n, ret = gpio_request_one(ptn_bridge->gpio_pd_n,
GPIOF_OUT_INIT_HIGH, "PTN3460_PD_N"); GPIOF_OUT_INIT_HIGH, "PTN3460_PD_N");
if (ret) { if (ret) {
DRM_ERROR("Request powerdown-gpio failed (%d)\n", ret); dev_err(&client->dev,
"Request powerdown-gpio failed (%d)\n", ret);
return 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, ret = gpio_request_one(ptn_bridge->gpio_rst_n,
GPIOF_OUT_INIT_LOW, "PTN3460_RST_N"); GPIOF_OUT_INIT_LOW, "PTN3460_RST_N");
if (ret) { 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); gpio_free(ptn_bridge->gpio_pd_n);
return ret; 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", ret = of_property_read_u32(node, "edid-emulation",
&ptn_bridge->edid_emulation); &ptn_bridge->edid_emulation);
if (ret) { if (ret) {
DRM_ERROR("Can't read edid emulation value\n"); dev_err(&client->dev, "Can't read EDID emulation value\n");
goto err; goto err;
} }
ret = drm_bridge_init(dev, bridge, &ptn3460_bridge_funcs); ret = drm_bridge_init(dev, &ptn_bridge->bridge, &ptn3460_bridge_funcs);
if (ret) { if (ret) {
DRM_ERROR("Failed to initialize bridge with drm\n"); DRM_ERROR("Failed to initialize bridge with drm\n");
goto err; goto err;
} }
bridge->driver_private = ptn_bridge; encoder->bridge = &ptn_bridge->bridge;
encoder->bridge = bridge;
ret = drm_connector_init(dev, &ptn_bridge->connector, ret = drm_connector_init(dev, &ptn_bridge->connector,
&ptn3460_connector_funcs, DRM_MODE_CONNECTOR_LVDS); &ptn3460_connector_funcs, DRM_MODE_CONNECTOR_LVDS);