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drm/amdgpu/display: add support for multiple backlights

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On platforms that support multiple backlights, register
each one separately.  This lets us manage them independently
rather than registering a single backlight and applying the
same settings to both.

v2: fix typo:
Reported-by: kernel test robot <lkp@intel.com>

Reviewed-by: Roman Li <Roman.Li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher
2021-07-08 16:31:10 -04:00
parent 50dea4ec1a
commit 7fd13baeb7
3 changed files with 84 additions and 71 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
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@@ -854,8 +854,8 @@ int amdgpu_acpi_init(struct amdgpu_device *adev)
if (amdgpu_device_has_dc_support(adev)) {
#if defined(CONFIG_DRM_AMD_DC)
struct amdgpu_display_manager *dm = &adev->dm;
if (dm->backlight_dev)
atif->bd = dm->backlight_dev;
if (dm->backlight_dev[0])
atif->bd = dm->backlight_dev[0];
#endif
} else {
struct drm_encoder *tmp;