This uses backlight_device_set_brightness() to set the brightness
level requested via ATIF.
Signed-off-by: Andriy Gapon <avg@xxxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c | 20 +++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
index 1e41367ef74ee..a8157a5154243 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 +462,25 @@ static int amdgpu_atif_handler(struct amdgpu_device *adev,
#endif
}
}
+#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
if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
if (adev->flags & AMD_IS_PX) {
pm_runtime_get_sync(adev->ddev->dev);
--
2.22.0
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