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amdgpu_acpi: add backlight control for the DC case 

This uses backlight_device_set_brightness() to set the brightness
level requested via ATIF.

Signed-off-by: Andriy Gapon <avg@FreeBSD.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Andriy Gapon 2020-05-05 16:27:29 +03:00 committed by Alex Deucher
parent a2eb03a569
commit bcb7b0ef82
1 changed files with 21 additions and 1 deletions
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22
drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
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@ -444,7 +444,6 @@ static int amdgpu_atif_handler(struct amdgpu_device *adev,
DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
/* todo: add DC handling */
if ((req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) &&
!amdgpu_device_has_dc_support(adev)) {
struct amdgpu_encoder *enc = atif->encoder_for_bl;
@ -463,6 +462,27 @@ static int amdgpu_atif_handler(struct amdgpu_device *adev,
#endif
}
}
#if defined(CONFIG_DRM_AMD_DC)
#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
if ((req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) &&
amdgpu_device_has_dc_support(adev)) {
struct amdgpu_display_manager *dm = &adev->dm;
struct backlight_device *bd = dm->backlight_dev;
if (bd) {
DRM_DEBUG_DRIVER("Changing brightness to %d\n",
req.backlight_level);
/*
* XXX backlight_device_set_brightness() is
* hardwired to post BACKLIGHT_UPDATE_SYSFS.
* It probably should accept 'reason' parameter.
*/
backlight_device_set_brightness(bd, req.backlight_level);
}
}
#endif
#endif
if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
if (adev->flags & AMD_IS_PX) {
pm_runtime_get_sync(adev->ddev->dev);