diff options
| author | Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> | 2020-01-24 10:44:20 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-02-11 11:50:06 -0500 |
| commit | 945628101be55833a63355510d4b6c934183deab (patch) | |
| tree | efa11c2b87520f2de200ae317656f78e5e1d37fd /drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | |
| parent | 8a683eb6311a03b655ab8ff368cd7b203074275c (diff) | |
drm/amd/display: Add backlight support via AUX
Several modern displays support HDR/OLED panel, and one of the
interesting changes provided by this technology is the new approach for
handling backlight. More precisely, in the traditional way, we use PWM
to manage display backlight; however, with HDR/OLED we begin to use DP
Aux channel for adjusting the backlight.
This patch, enable the backlight control in HDR/OLED display via DP Aux.
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h index 7ea9acb0358d..2bec5e6a3054 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h @@ -90,15 +90,41 @@ struct dm_comressor_info { }; /** - * struct amdgpu_dm_backlight_caps - Usable range of backlight values from ACPI - * @min_input_signal: minimum possible input in range 0-255 - * @max_input_signal: maximum possible input in range 0-255 - * @caps_valid: true if these values are from the ACPI interface + * struct amdgpu_dm_backlight_caps - Information about backlight + * + * Describe the backlight support for ACPI or eDP AUX. */ struct amdgpu_dm_backlight_caps { + /** + * @ext_caps: Keep the data struct with all the information about the + * display support for HDR. + */ + union dpcd_sink_ext_caps *ext_caps; + /** + * @aux_min_input_signal: Min brightness value supported by the display + */ + u32 aux_min_input_signal; + /** + * @aux_max_input_signal: Max brightness value supported by the display + * in nits. + */ + u32 aux_max_input_signal; + /** + * @min_input_signal: minimum possible input in range 0-255. + */ int min_input_signal; + /** + * @max_input_signal: maximum possible input in range 0-255. + */ int max_input_signal; + /** + * @caps_valid: true if these values are from the ACPI interface. + */ bool caps_valid; + /** + * @aux_support: Describes if the display supports AUX backlight. + */ + bool aux_support; }; /** |