diff options
| author | Andriy Gapon <avg@FreeBSD.org> | 2020-05-05 16:27:29 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-05-05 20:12:55 +0300 |
| commit | bcb7b0ef828c21a0b629d6081c0827e71574d652 (patch) | |
| tree | 3bd417fac701d782551f45f8380f971f7c8a84ec /drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c | |
| parent | a2eb03a569f7482da3bed651424606da7b960bf8 (diff) | |
| download | linux-bcb7b0ef828c21a0b629d6081c0827e71574d652.tar.xz | |
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>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c index 1e41367ef74e..956cbbda4793 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c @@ -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); |