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Message-Id: <20210908111500.1.I9f6dac462da830fa0a8ccccbe977ca918bf14e4a@changeid>
Date: Wed, 8 Sep 2021 11:18:05 -0700
From: Philip Chen <philipchen@...omium.org>
To: LKML <linux-kernel@...r.kernel.org>
Cc: swboyd@...omium.org, dianders@...omium.org,
Philip Chen <philipchen@...omium.org>,
Andrzej Hajda <a.hajda@...sung.com>,
Daniel Vetter <daniel@...ll.ch>,
David Airlie <airlied@...ux.ie>,
Jernej Skrabec <jernej.skrabec@...il.com>,
Jonas Karlman <jonas@...boo.se>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
Neil Armstrong <narmstrong@...libre.com>,
Robert Foss <robert.foss@...aro.org>,
dri-devel@...ts.freedesktop.org
Subject: [PATCH 1/2] drm/bridge: parade-ps8640: Use regmap APIs
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@...omium.org>
---
drivers/gpu/drm/bridge/parade-ps8640.c | 66 +++++++++++++++-----------
1 file changed, 39 insertions(+), 27 deletions(-)
diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
index 685e9c38b2db..a16725dbf912 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>
@@ -64,12 +65,29 @@ 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_range ps8640_volatile_ranges[] = {
+ { .range_min = 0, .range_max = 0xff },
+};
+
+static const struct regmap_access_table ps8640_volatile_table = {
+ .yes_ranges = ps8640_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(ps8640_volatile_ranges),
+};
+
+static const struct regmap_config ps8640_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .volatile_table = &ps8640_volatile_table,
+ .cache_type = REGCACHE_NONE,
+};
+
static inline struct ps8640 *bridge_to_ps8640(struct drm_bridge *e)
{
return container_of(e, struct ps8640, bridge);
@@ -78,13 +96,13 @@ 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];
- u8 vdo_ctrl_buf[] = { VDO_CTL_ADD, ctrl };
+ 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);
@@ -96,8 +114,7 @@ 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)
@@ -121,18 +138,12 @@ static void ps8640_bridge_poweron(struct ps8640 *ps_bridge)
*/
msleep(200);
- timeout = jiffies + msecs_to_jiffies(200) + 1;
+ ret = regmap_read_poll_timeout(map, PAGE2_GPIO_H, status,
+ status & PS_GPIO9, 20 * 1000, 200 * 1000);
- 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;
-
- msleep(20);
+ if (ret < 0) {
+ DRM_ERROR("failed read PAGE2_GPIO_H: %d\n", ret);
+ goto err_regulators_disable;
}
msleep(50);
@@ -144,22 +155,15 @@ 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;
@@ -361,6 +365,10 @@ static int ps8640_probe(struct i2c_client *client)
ps_bridge->bridge.type = DRM_MODE_CONNECTOR_eDP;
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,
@@ -371,6 +379,10 @@ static int ps8640_probe(struct i2c_client *client)
client->addr + i);
return PTR_ERR(ps_bridge->page[i]);
}
+ ps_bridge->regmap[i] = devm_regmap_init_i2c(ps_bridge->page[i],
+ &ps8640_regmap_config);
+ if (IS_ERR(ps_bridge->regmap))
+ return PTR_ERR(ps_bridge->regmap[i]);
}
i2c_set_clientdata(client, ps_bridge);
--
2.33.0.153.gba50c8fa24-goog
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