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drm/amdgpu/display: handle aux backlight in backlight_get_brightness

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Need to fetch it via aux.

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2020-12-10 01:45:12 -05:00
parent dfd8b7fbd9
commit 0ad3e64eb4
1 changed files with 20 additions and 4 deletions
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24
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -3258,11 +3258,27 @@ static int amdgpu_dm_backlight_update_status(struct backlight_device *bd)
static int amdgpu_dm_backlight_get_brightness(struct backlight_device *bd)
{
struct amdgpu_display_manager *dm = bl_get_data(bd);
int ret = dc_link_get_backlight_level(dm->backlight_link);
struct amdgpu_dm_backlight_caps caps;
if (ret == DC_ERROR_UNEXPECTED)
return bd->props.brightness;
return convert_brightness_to_user(&dm->backlight_caps, ret);
amdgpu_dm_update_backlight_caps(dm);
caps = dm->backlight_caps;
if (caps.aux_support) {
struct dc_link *link = (struct dc_link *)dm->backlight_link;
u32 avg, peak;
bool rc;
rc = dc_link_get_backlight_level_nits(link, &avg, &peak);
if (!rc)
return bd->props.brightness;
return convert_brightness_to_user(&caps, avg);
} else {
int ret = dc_link_get_backlight_level(dm->backlight_link);
if (ret == DC_ERROR_UNEXPECTED)
return bd->props.brightness;
return convert_brightness_to_user(&caps, ret);
}
}
static const struct backlight_ops amdgpu_dm_backlight_ops = {