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drm/bridge: lvds-codec: Add support for regulator 

Add the support for enabling optional regulator that may be used as VCC
source.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
[Replaced 'error' variable with 'ret']
[Renamed regulator from 'vcc' to 'power']
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200922105526.5252-1-laurent.pinchart+renesas@ideasonboard.com
This commit is contained in:
Biju Das 2020-09-22 13:55:26 +03:00 committed by Sam Ravnborg
parent 7488555821
commit 9e9b18b681
1 changed files with 29 additions and 0 deletions
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29
drivers/gpu/drm/bridge/lvds-codec.c
View File

@ -10,13 +10,16 @@
#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <drm/drm_bridge.h>
#include <drm/drm_panel.h>
struct lvds_codec {
struct device *dev;
struct drm_bridge bridge;
struct drm_bridge *panel_bridge;
struct regulator *vcc;
struct gpio_desc *powerdown_gpio;
u32 connector_type;
};
@ -38,6 +41,14 @@ static int lvds_codec_attach(struct drm_bridge *bridge,
static void lvds_codec_enable(struct drm_bridge *bridge)
{
struct lvds_codec *lvds_codec = to_lvds_codec(bridge);
int ret;
ret = regulator_enable(lvds_codec->vcc);
if (ret) {
dev_err(lvds_codec->dev,
"Failed to enable regulator \"vcc\": %d\n", ret);
return;
}
if (lvds_codec->powerdown_gpio)
gpiod_set_value_cansleep(lvds_codec->powerdown_gpio, 0);
@ -46,9 +57,15 @@ static void lvds_codec_enable(struct drm_bridge *bridge)
static void lvds_codec_disable(struct drm_bridge *bridge)
{
struct lvds_codec *lvds_codec = to_lvds_codec(bridge);
int ret;
if (lvds_codec->powerdown_gpio)
gpiod_set_value_cansleep(lvds_codec->powerdown_gpio, 1);
ret = regulator_disable(lvds_codec->vcc);
if (ret)
dev_err(lvds_codec->dev,
"Failed to disable regulator \"vcc\": %d\n", ret);
}
static const struct drm_bridge_funcs funcs = {
@ -63,12 +80,24 @@ static int lvds_codec_probe(struct platform_device *pdev)
struct device_node *panel_node;
struct drm_panel *panel;
struct lvds_codec *lvds_codec;
int ret;
lvds_codec = devm_kzalloc(dev, sizeof(*lvds_codec), GFP_KERNEL);
if (!lvds_codec)
return -ENOMEM;
lvds_codec->dev = &pdev->dev;
lvds_codec->connector_type = (uintptr_t)of_device_get_match_data(dev);
lvds_codec->vcc = devm_regulator_get(lvds_codec->dev, "power");
if (IS_ERR(lvds_codec->vcc)) {
ret = PTR_ERR(lvds_codec->vcc);
if (ret != -EPROBE_DEFER)
dev_err(lvds_codec->dev,
"Unable to get \"vcc\" supply: %d\n", ret);
return ret;
}
lvds_codec->powerdown_gpio = devm_gpiod_get_optional(dev, "powerdown",
GPIOD_OUT_HIGH);
if (IS_ERR(lvds_codec->powerdown_gpio))