diff mbox series

[5.15,062/179] drm/amd/display: Fix OLED brightness control on eDP

Message ID 20211129181721.002093923@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman Nov. 29, 2021, 6:17 p.m. UTC 
From: Roman Li <Roman.Li@amd.com>

commit dab60582685aabdae2d4ff7ce716456bd0dc7a0f upstream.

[Why]
After commit ("drm/amdgpu/display: add support for multiple backlights")
number of eDPs is defined while registering backlight device.
However the panel's extended caps get updated once before register call.
That leads to regression with extended caps like oled brightness control.

[How]
Update connector ext caps after register_backlight_device

Fixes: 7fd13baeb7a3a4 ("drm/amdgpu/display: add support for multiple backlights")
Link: https://www.reddit.com/r/AMDLaptops/comments/qst0fm/after_updating_to_linux_515_my_brightness/

Signed-off-by: Roman Li <Roman.Li@amd.com>
Tested-by: Samuel Čavoj <samuel@cavoj.net>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jasdeep Dhillon <Jasdeep.Dhillon@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |    3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -3846,6 +3846,9 @@  static int amdgpu_dm_initialize_drm_devi
 		} else if (dc_link_detect(link, DETECT_REASON_BOOT)) {
 			amdgpu_dm_update_connector_after_detect(aconnector);
 			register_backlight_device(dm, link);
+
+			if (dm->num_of_edps)
+				update_connector_ext_caps(aconnector);
 			if (amdgpu_dc_feature_mask & DC_PSR_MASK)
 				amdgpu_dm_set_psr_caps(link);
 		}