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Date: Fri, 15 Jan 2021 15:02:52 +0800 From: Hsin-Yi Wang <hsinyi@...omium.org> To: Xin Ji <xji@...logixsemi.com>, David Airlie <airlied@...ux.ie> Cc: Sam Ravnborg <sam@...nborg.org>, Rob Herring <robh+dt@...nel.org>, Daniel Vetter <daniel@...ll.ch>, Hsin-Yi Wang <hsinyi@...omium.org>, dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, Andrzej Hajda <a.hajda@...sung.com>, Neil Armstrong <narmstrong@...libre.com>, Laurent Pinchart <Laurent.pinchart@...asonboard.com>, Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...l.net> Subject: [PATCH v3 2/2] drm/bridge: anx7625: disable regulators when power off 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@...omium.org> --- Change: v3: add delays between regulators power on --- drivers/gpu/drm/bridge/analogix/anx7625.c | 34 +++++++++++++++++++++++ drivers/gpu/drm/bridge/analogix/anx7625.h | 1 + 2 files changed, 35 insertions(+) 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; -- 2.30.0.284.gd98b1dd5eaa7-goog
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