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 c1631d61336e..dcae658fbc50 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -1320,7 +1320,12 @@ static int amdgpu_dm_backlight_update_status(struct backlight_device *bd) static int amdgpu_dm_backlight_get_brightness(struct backlight_device *bd) { - return bd->props.brightness; + struct amdgpu_display_manager *dm = bl_get_data(bd); + int ret = dc_link_get_backlight_level(dm->backlight_link); + + if (ret == DC_ERROR_UNEXPECTED) + return bd->props.brightness; + return ret; } static const struct backlight_ops amdgpu_dm_backlight_ops = { diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index ce65b4d5062e..9a6448e2089c 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -2026,6 +2026,15 @@ enum dc_status dc_link_validate_mode_timing( return DC_OK; } +int dc_link_get_backlight_level(const struct dc_link *link) +{ + struct abm *abm = link->ctx->dc->res_pool->abm; + + if (abm == NULL || abm->funcs->get_current_backlight_8_bit == NULL) + return DC_ERROR_UNEXPECTED; + + return (int) abm->funcs->get_current_backlight_8_bit(abm); +} bool dc_link_set_backlight_level(const struct dc_link *link, uint32_t level, uint32_t frame_ramp, const struct dc_stream_state *stream) diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h index 070a56926308..22f4ddd219d1 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_link.h +++ b/drivers/gpu/drm/amd/display/dc/dc_link.h @@ -141,6 +141,8 @@ static inline struct dc_link *dc_get_link_at_index(struct dc *dc, uint32_t link_ bool dc_link_set_backlight_level(const struct dc_link *dc_link, uint32_t level, uint32_t frame_ramp, const struct dc_stream_state *stream); +int dc_link_get_backlight_level(const struct dc_link *dc_link); + bool dc_link_set_abm_disable(const struct dc_link *dc_link); bool dc_link_set_psr_enable(const struct dc_link *dc_link, bool enable, bool wait);