| Message ID | 20201123034652.3660584-2-hsinyi@chromium.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2,1/2] dt-bindings: drm/bridge: anx7625: Add power supplies | expand |
On Mon, Nov 23, 2020 at 11:47 AM Hsin-Yi Wang <hsinyi@chromium.org> wrote: > > 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> Gentle ping on the patch > --- > Change: > v2: none > --- > drivers/gpu/drm/bridge/analogix/anx7625.c | 25 +++++++++++++++++++++++ > drivers/gpu/drm/bridge/analogix/anx7625.h | 1 + > 2 files changed, 26 insertions(+) > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c > index 65cc05982f82..eb9c4cc2504a 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 +876,20 @@ 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; > > if (!ctx->pdata.low_power_mode) { > DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n"); > return; > } > > + ret = regulator_bulk_enable(ARRAY_SIZE(ctx->pdata.supplies), > + ctx->pdata.supplies); > + if (ret < 0) { > + DRM_DEV_DEBUG_DRIVER(dev, "cannot enable regulators %d\n", ret); > + return; > + } > + > /* Power on pin enable */ > gpiod_set_value(ctx->pdata.gpio_p_on, 1); > usleep_range(10000, 11000); > @@ -894,6 +903,7 @@ static void anx7625_power_on(struct anx7625_data *ctx) > 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 +914,12 @@ 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 regulators %d\n", ret); > + > DRM_DEV_DEBUG_DRIVER(dev, "power down\n"); > } > > @@ -1742,6 +1758,15 @@ 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; > -- > 2.29.2.454.gaff20da3a2-goog >
On Wed, Dec 9, 2020 at 12:43 PM Hsin-Yi Wang <hsinyi@chromium.org> wrote: > > On Mon, Nov 23, 2020 at 11:47 AM Hsin-Yi Wang <hsinyi@chromium.org> wrote: > > > > 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> > > Gentle ping on the patch > After some testing, the powering sequence has some issue and would cause i2c failures. The powering sequence needs to be rechecked. > > --- > > Change: > > v2: none > > --- > > drivers/gpu/drm/bridge/analogix/anx7625.c | 25 +++++++++++++++++++++++ > > drivers/gpu/drm/bridge/analogix/anx7625.h | 1 + > > 2 files changed, 26 insertions(+) > > > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c > > index 65cc05982f82..eb9c4cc2504a 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 +876,20 @@ 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; > > > > if (!ctx->pdata.low_power_mode) { > > DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n"); > > return; > > } > > > > + ret = regulator_bulk_enable(ARRAY_SIZE(ctx->pdata.supplies), > > + ctx->pdata.supplies); > > + if (ret < 0) { > > + DRM_DEV_DEBUG_DRIVER(dev, "cannot enable regulators %d\n", ret); > > + return; > > + } > > + > > /* Power on pin enable */ > > gpiod_set_value(ctx->pdata.gpio_p_on, 1); > > usleep_range(10000, 11000); > > @@ -894,6 +903,7 @@ static void anx7625_power_on(struct anx7625_data *ctx) > > 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 +914,12 @@ 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 regulators %d\n", ret); > > + > > DRM_DEV_DEBUG_DRIVER(dev, "power down\n"); > > } > > > > @@ -1742,6 +1758,15 @@ 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; > > -- > > 2.29.2.454.gaff20da3a2-goog > >
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index 65cc05982f82..eb9c4cc2504a 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 +876,20 @@ 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; if (!ctx->pdata.low_power_mode) { DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n"); return; } + ret = regulator_bulk_enable(ARRAY_SIZE(ctx->pdata.supplies), + ctx->pdata.supplies); + if (ret < 0) { + DRM_DEV_DEBUG_DRIVER(dev, "cannot enable regulators %d\n", ret); + return; + } + /* Power on pin enable */ gpiod_set_value(ctx->pdata.gpio_p_on, 1); usleep_range(10000, 11000); @@ -894,6 +903,7 @@ static void anx7625_power_on(struct anx7625_data *ctx) 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 +914,12 @@ 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 regulators %d\n", ret); + DRM_DEV_DEBUG_DRIVER(dev, "power down\n"); } @@ -1742,6 +1758,15 @@ 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;
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> --- Change: v2: none --- drivers/gpu/drm/bridge/analogix/anx7625.c | 25 +++++++++++++++++++++++ drivers/gpu/drm/bridge/analogix/anx7625.h | 1 + 2 files changed, 26 insertions(+)