From: Hsin-Yi Wang <hsinyi@chromium.org>
To: Xin Ji <xji@analogixsemi.com>, dri-devel@lists.freedesktop.org
Cc: David Airlie <airlied@linux.ie>,
Robert Foss <robert.foss@linaro.org>,
Sam Ravnborg <sam@ravnborg.org>, Rob Herring <robh+dt@kernel.org>,
Daniel Vetter <daniel@ffwll.ch>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Neil Armstrong <narmstrong@baylibre.com>
Subject: [PATCH v4 2/2] drm/bridge: anx7625: disable regulators when power off
Date: Wed, 24 Feb 2021 14:14:09 +0800 [thread overview]
Message-ID: <20210224061409.3996755-2-hsinyi@chromium.org> (raw)
In-Reply-To: <20210224061409.3996755-1-hsinyi@chromium.org>
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>
---
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 65cc05982f826..23283ba0c4f93 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 193ad86c54503..e4a086b3a3d7b 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;
--
2.30.1.766.gb4fecdf3b7-goog
next prev parent reply other threads:[~2021-02-24 6:18 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-24 6:14 [PATCH v4 1/2] dt-bindings: drm/bridge: anx7625: Add power supplies Hsin-Yi Wang
2021-02-24 6:14 ` Hsin-Yi Wang [this message]
2021-03-18 4:26 ` [PATCH v4 2/2] drm/bridge: anx7625: disable regulators when power off Hsin-Yi Wang
2021-03-19 2:49 ` Xin Ji
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210224061409.3996755-2-hsinyi@chromium.org \
--to=hsinyi@chromium.org \
--cc=Laurent.pinchart@ideasonboard.com \
--cc=airlied@linux.ie \
--cc=daniel@ffwll.ch \
--cc=devicetree@vger.kernel.org \
--cc=dri-devel@lists.freedesktop.org \
--cc=linux-kernel@vger.kernel.org \
--cc=narmstrong@baylibre.com \
--cc=robert.foss@linaro.org \
--cc=robh+dt@kernel.org \
--cc=sam@ravnborg.org \
--cc=xji@analogixsemi.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).