From de6231fc7f2b8825e328953e2c7729d76f4b62bd Mon Sep 17 00:00:00 2001 From: Roman Li Date: Wed, 17 Nov 2021 10:05:36 -0500 Subject: [PATCH] drm/amd/display: Fix OLED brightness control on eDP MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Tested-by: Samuel Čavoj Acked-by: Alex Deucher Reviewed-by: Jasdeep Dhillon Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 084491afe540..d15967239474 100644 --- 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_device(struct amdgpu_device *adev) } 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); }