mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 23:40:25 +07:00
59104f239b
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* shmob_drm_backlight.c -- SH Mobile DRM Backlight
|
|
*
|
|
* Copyright (C) 2012 Renesas Electronics Corporation
|
|
*
|
|
* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
|
|
*/
|
|
|
|
#include <linux/backlight.h>
|
|
|
|
#include "shmob_drm_backlight.h"
|
|
#include "shmob_drm_crtc.h"
|
|
#include "shmob_drm_drv.h"
|
|
|
|
static int shmob_drm_backlight_update(struct backlight_device *bdev)
|
|
{
|
|
struct shmob_drm_connector *scon = bl_get_data(bdev);
|
|
struct shmob_drm_device *sdev = scon->connector.dev->dev_private;
|
|
const struct shmob_drm_backlight_data *bdata = &sdev->pdata->backlight;
|
|
int brightness = bdev->props.brightness;
|
|
|
|
if (bdev->props.power != FB_BLANK_UNBLANK ||
|
|
bdev->props.state & BL_CORE_SUSPENDED)
|
|
brightness = 0;
|
|
|
|
return bdata->set_brightness(brightness);
|
|
}
|
|
|
|
static int shmob_drm_backlight_get_brightness(struct backlight_device *bdev)
|
|
{
|
|
struct shmob_drm_connector *scon = bl_get_data(bdev);
|
|
struct shmob_drm_device *sdev = scon->connector.dev->dev_private;
|
|
const struct shmob_drm_backlight_data *bdata = &sdev->pdata->backlight;
|
|
|
|
return bdata->get_brightness();
|
|
}
|
|
|
|
static const struct backlight_ops shmob_drm_backlight_ops = {
|
|
.options = BL_CORE_SUSPENDRESUME,
|
|
.update_status = shmob_drm_backlight_update,
|
|
.get_brightness = shmob_drm_backlight_get_brightness,
|
|
};
|
|
|
|
void shmob_drm_backlight_dpms(struct shmob_drm_connector *scon, int mode)
|
|
{
|
|
if (scon->backlight == NULL)
|
|
return;
|
|
|
|
scon->backlight->props.power = mode == DRM_MODE_DPMS_ON
|
|
? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
|
|
backlight_update_status(scon->backlight);
|
|
}
|
|
|
|
int shmob_drm_backlight_init(struct shmob_drm_connector *scon)
|
|
{
|
|
struct shmob_drm_device *sdev = scon->connector.dev->dev_private;
|
|
const struct shmob_drm_backlight_data *bdata = &sdev->pdata->backlight;
|
|
struct drm_connector *connector = &scon->connector;
|
|
struct drm_device *dev = connector->dev;
|
|
struct backlight_device *backlight;
|
|
|
|
if (!bdata->max_brightness)
|
|
return 0;
|
|
|
|
backlight = backlight_device_register(bdata->name, dev->dev, scon,
|
|
&shmob_drm_backlight_ops, NULL);
|
|
if (IS_ERR(backlight)) {
|
|
dev_err(dev->dev, "unable to register backlight device: %ld\n",
|
|
PTR_ERR(backlight));
|
|
return PTR_ERR(backlight);
|
|
}
|
|
|
|
backlight->props.max_brightness = bdata->max_brightness;
|
|
backlight->props.brightness = bdata->max_brightness;
|
|
backlight->props.power = FB_BLANK_POWERDOWN;
|
|
backlight_update_status(backlight);
|
|
|
|
scon->backlight = backlight;
|
|
return 0;
|
|
}
|
|
|
|
void shmob_drm_backlight_exit(struct shmob_drm_connector *scon)
|
|
{
|
|
backlight_device_unregister(scon->backlight);
|
|
}
|