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drm/amd/display: Fix OLED brightness control on eDP
commit dab6058 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: 7fd13ba ("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>
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