This is a note to let you know that I've just added the patch titled
drm/bridge: parade-ps8640: Use regmap APIs
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-bridge-parade-ps8640-use-regmap-apis.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit af54466e5b4eef355f8fee40de437401e6f8381a
Author: Philip Chen <philipchen@xxxxxxxxxxxx>
Date: Tue Sep 21 11:06:16 2021 -0700
drm/bridge: parade-ps8640: Use regmap APIs
[ Upstream commit 692d8db0a5ca123017d7d4847856343512f87af9 ]
Replace the direct i2c access (i2c_smbus_* functions) with regmap APIs,
which will simplify the future update on ps8640 driver.
Signed-off-by: Philip Chen <philipchen@xxxxxxxxxxxx>
Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Reviewed-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
[dianders: whitespace fixes reported by dim apply-branch]
Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20210921110556.v6.1.I2351df94f18d5d8debc22d4d100f36fac560409a@changeid
Stable-dep-of: fc94224c2e0a ("drm/bridge: parade-ps8640: Fix regulator supply order")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
index 7bd0affa057a..88c9f3404ac1 100644
--- a/drivers/gpu/drm/bridge/parade-ps8640.c
+++ b/drivers/gpu/drm/bridge/parade-ps8640.c
@@ -9,6 +9,7 @@
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of_graph.h>
+#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <drm/drm_bridge.h>
@@ -29,6 +30,11 @@
#define VDO_EN 0x1c
#define DP_NUM_LANES 4
+#define COMMON_PS8640_REGMAP_CONFIG \
+ .reg_bits = 8, \
+ .val_bits = 8, \
+ .cache_type = REGCACHE_NONE
+
/*
* PS8640 uses multiple addresses:
* page[0]: for DP control
@@ -62,12 +68,48 @@ struct ps8640 {
struct drm_bridge *panel_bridge;
struct mipi_dsi_device *dsi;
struct i2c_client *page[MAX_DEVS];
+ struct regmap *regmap[MAX_DEVS];
struct regulator_bulk_data supplies[2];
struct gpio_desc *gpio_reset;
struct gpio_desc *gpio_powerdown;
bool powered;
};
+static const struct regmap_config ps8640_regmap_config[] = {
+ [PAGE0_DP_CNTL] = {
+ COMMON_PS8640_REGMAP_CONFIG,
+ .max_register = 0xbf,
+ },
+ [PAGE1_VDO_BDG] = {
+ COMMON_PS8640_REGMAP_CONFIG,
+ .max_register = 0xff,
+ },
+ [PAGE2_TOP_CNTL] = {
+ COMMON_PS8640_REGMAP_CONFIG,
+ .max_register = 0xff,
+ },
+ [PAGE3_DSI_CNTL1] = {
+ COMMON_PS8640_REGMAP_CONFIG,
+ .max_register = 0xff,
+ },
+ [PAGE4_MIPI_PHY] = {
+ COMMON_PS8640_REGMAP_CONFIG,
+ .max_register = 0xff,
+ },
+ [PAGE5_VPLL] = {
+ COMMON_PS8640_REGMAP_CONFIG,
+ .max_register = 0x7f,
+ },
+ [PAGE6_DSI_CNTL2] = {
+ COMMON_PS8640_REGMAP_CONFIG,
+ .max_register = 0xff,
+ },
+ [PAGE7_SPI_CNTL] = {
+ COMMON_PS8640_REGMAP_CONFIG,
+ .max_register = 0xff,
+ },
+};
+
static inline struct ps8640 *bridge_to_ps8640(struct drm_bridge *e)
{
return container_of(e, struct ps8640, bridge);
@@ -76,13 +118,13 @@ static inline struct ps8640 *bridge_to_ps8640(struct drm_bridge *e)
static int ps8640_bridge_vdo_control(struct ps8640 *ps_bridge,
const enum ps8640_vdo_control ctrl)
{
- struct i2c_client *client = ps_bridge->page[PAGE3_DSI_CNTL1];
+ struct regmap *map = ps_bridge->regmap[PAGE3_DSI_CNTL1];
u8 vdo_ctrl_buf[] = { VDO_CTL_ADD, ctrl };
int ret;
- ret = i2c_smbus_write_i2c_block_data(client, PAGE3_SET_ADD,
- sizeof(vdo_ctrl_buf),
- vdo_ctrl_buf);
+ ret = regmap_bulk_write(map, PAGE3_SET_ADD,
+ vdo_ctrl_buf, sizeof(vdo_ctrl_buf));
+
if (ret < 0) {
DRM_ERROR("failed to %sable VDO: %d\n",
ctrl == ENABLE ? "en" : "dis", ret);
@@ -94,8 +136,7 @@ static int ps8640_bridge_vdo_control(struct ps8640 *ps_bridge,
static void ps8640_bridge_poweron(struct ps8640 *ps_bridge)
{
- struct i2c_client *client = ps_bridge->page[PAGE2_TOP_CNTL];
- unsigned long timeout;
+ struct regmap *map = ps_bridge->regmap[PAGE2_TOP_CNTL];
int ret, status;
if (ps_bridge->powered)
@@ -119,18 +160,12 @@ static void ps8640_bridge_poweron(struct ps8640 *ps_bridge)
*/
msleep(200);
- timeout = jiffies + msecs_to_jiffies(200) + 1;
-
- while (time_is_after_jiffies(timeout)) {
- status = i2c_smbus_read_byte_data(client, PAGE2_GPIO_H);
- if (status < 0) {
- DRM_ERROR("failed read PAGE2_GPIO_H: %d\n", status);
- goto err_regulators_disable;
- }
- if ((status & PS_GPIO9) == PS_GPIO9)
- break;
+ ret = regmap_read_poll_timeout(map, PAGE2_GPIO_H, status,
+ status & PS_GPIO9, 20 * 1000, 200 * 1000);
- msleep(20);
+ if (ret < 0) {
+ DRM_ERROR("failed read PAGE2_GPIO_H: %d\n", ret);
+ goto err_regulators_disable;
}
msleep(50);
@@ -142,22 +177,15 @@ static void ps8640_bridge_poweron(struct ps8640 *ps_bridge)
* disabled by the manufacturer. Once disabled, all MCS commands are
* ignored by the display interface.
*/
- status = i2c_smbus_read_byte_data(client, PAGE2_MCS_EN);
- if (status < 0) {
- DRM_ERROR("failed read PAGE2_MCS_EN: %d\n", status);
- goto err_regulators_disable;
- }
- ret = i2c_smbus_write_byte_data(client, PAGE2_MCS_EN,
- status & ~MCS_EN);
+ ret = regmap_update_bits(map, PAGE2_MCS_EN, MCS_EN, 0);
if (ret < 0) {
DRM_ERROR("failed write PAGE2_MCS_EN: %d\n", ret);
goto err_regulators_disable;
}
/* Switch access edp panel's edid through i2c */
- ret = i2c_smbus_write_byte_data(client, PAGE2_I2C_BYPASS,
- I2C_BYPASS_EN);
+ ret = regmap_write(map, PAGE2_I2C_BYPASS, I2C_BYPASS_EN);
if (ret < 0) {
DRM_ERROR("failed write PAGE2_I2C_BYPASS: %d\n", ret);
goto err_regulators_disable;
@@ -360,15 +388,21 @@ static int ps8640_probe(struct i2c_client *client)
ps_bridge->page[PAGE0_DP_CNTL] = client;
+ ps_bridge->regmap[PAGE0_DP_CNTL] = devm_regmap_init_i2c(client, ps8640_regmap_config);
+ if (IS_ERR(ps_bridge->regmap[PAGE0_DP_CNTL]))
+ return PTR_ERR(ps_bridge->regmap[PAGE0_DP_CNTL]);
+
for (i = 1; i < ARRAY_SIZE(ps_bridge->page); i++) {
ps_bridge->page[i] = devm_i2c_new_dummy_device(&client->dev,
client->adapter,
client->addr + i);
- if (IS_ERR(ps_bridge->page[i])) {
- dev_err(dev, "failed i2c dummy device, address %02x\n",
- client->addr + i);
+ if (IS_ERR(ps_bridge->page[i]))
return PTR_ERR(ps_bridge->page[i]);
- }
+
+ ps_bridge->regmap[i] = devm_regmap_init_i2c(ps_bridge->page[i],
+ ps8640_regmap_config + i);
+ if (IS_ERR(ps_bridge->regmap[i]))
+ return PTR_ERR(ps_bridge->regmap[i]);
}
i2c_set_clientdata(client, ps_bridge);
