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authorHsin-Yi Wang <hsinyi@chromium.org>2021-04-01 13:32:02 +0800
committerRobert Foss <robert.foss@linaro.org>2021-04-01 10:38:02 +0200
commit6c744983004ebc66756e582294672f8b991288d5 (patch)
treeafcbfb6a83057e589cc8045b77b39af40a3e8baa
parent2f240cdb23e9cde551d99c77f4e60062188d8d81 (diff)
drm/bridge: anx7625: disable regulators when power offdrm-misc-next-2021-04-01
When suspending the driver, anx7625_power_standby() will be called to turn off reset-gpios and enable-gpios. However, power supplies are not disabled. To save power, the driver can get the power supply regulators and turn off them in anx7625_power_standby(). Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org> Reviewed-by: Robert Foss <robert.foss@linaro.org> Reviewed-by: Xin Ji <xji@analogixsemi.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210401053202.159302-2-hsinyi@chromium.org
-rw-r--r--drivers/gpu/drm/bridge/analogix/anx7625.c34
-rw-r--r--drivers/gpu/drm/bridge/analogix/anx7625.h1
2 files changed, 35 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index 65cc05982f82..23283ba0c4f9 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -11,6 +11,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
+#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/workqueue.h>
@@ -875,12 +876,25 @@ static int sp_tx_edid_read(struct anx7625_data *ctx,
static void anx7625_power_on(struct anx7625_data *ctx)
{
struct device *dev = &ctx->client->dev;
+ int ret, i;
if (!ctx->pdata.low_power_mode) {
DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n");
return;
}
+ for (i = 0; i < ARRAY_SIZE(ctx->pdata.supplies); i++) {
+ ret = regulator_enable(ctx->pdata.supplies[i].consumer);
+ if (ret < 0) {
+ DRM_DEV_DEBUG_DRIVER(dev, "cannot enable supply %d: %d\n",
+ i, ret);
+ goto reg_err;
+ }
+ usleep_range(2000, 2100);
+ }
+
+ usleep_range(4000, 4100);
+
/* Power on pin enable */
gpiod_set_value(ctx->pdata.gpio_p_on, 1);
usleep_range(10000, 11000);
@@ -889,11 +903,16 @@ static void anx7625_power_on(struct anx7625_data *ctx)
usleep_range(10000, 11000);
DRM_DEV_DEBUG_DRIVER(dev, "power on !\n");
+ return;
+reg_err:
+ for (--i; i >= 0; i--)
+ regulator_disable(ctx->pdata.supplies[i].consumer);
}
static void anx7625_power_standby(struct anx7625_data *ctx)
{
struct device *dev = &ctx->client->dev;
+ int ret;
if (!ctx->pdata.low_power_mode) {
DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n");
@@ -904,6 +923,12 @@ static void anx7625_power_standby(struct anx7625_data *ctx)
usleep_range(1000, 1100);
gpiod_set_value(ctx->pdata.gpio_p_on, 0);
usleep_range(1000, 1100);
+
+ ret = regulator_bulk_disable(ARRAY_SIZE(ctx->pdata.supplies),
+ ctx->pdata.supplies);
+ if (ret < 0)
+ DRM_DEV_DEBUG_DRIVER(dev, "cannot disable supplies %d\n", ret);
+
DRM_DEV_DEBUG_DRIVER(dev, "power down\n");
}
@@ -1742,6 +1767,15 @@ static int anx7625_i2c_probe(struct i2c_client *client,
platform->client = client;
i2c_set_clientdata(client, platform);
+ pdata->supplies[0].supply = "vdd10";
+ pdata->supplies[1].supply = "vdd18";
+ pdata->supplies[2].supply = "vdd33";
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pdata->supplies),
+ pdata->supplies);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "fail to get power supplies: %d\n", ret);
+ return ret;
+ }
anx7625_init_gpio(platform);
atomic_set(&platform->power_status, 0);
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
index 193ad86c5450..e4a086b3a3d7 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.h
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
@@ -350,6 +350,7 @@ struct s_edid_data {
struct anx7625_platform_data {
struct gpio_desc *gpio_p_on;
struct gpio_desc *gpio_reset;
+ struct regulator_bulk_data supplies[3];
struct drm_bridge *panel_bridge;
int intp_irq;
u32 low_power_mode;