[PATCH 05/13] drm/amd/display: Change Brightness Control Priority

[Fangzhi Zuo]

From: Muyuan Yang <muyuan.yang at amd.com>

Prioritize Aux-based over PWM-based brightness control
for more types of panels and introduce a new structure
to store and manage the type of brightness control used.

Reviewed-by: Anthony Koo <anthony.koo at amd.com>
Signed-off-by: Muyuan Yang <muyuan.yang at amd.com>
Signed-off-by: Fangzhi Zuo <jerry.zuo at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dc.h       | 1 +
 drivers/gpu/drm/amd/display/dc/dc_types.h | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 8878a770c376..059e5f4ede49 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -1786,6 +1786,7 @@ struct dc_link {
 	// BW ALLOCATON USB4 ONLY
 	struct dc_dpia_bw_alloc dpia_bw_alloc_config;
 	bool skip_implict_edp_power_control;
+	enum backlight_control_type backlight_control_type;
 };
 
 /* Return an enumerated dc_link.
diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h b/drivers/gpu/drm/amd/display/dc/dc_types.h
index b0b7102fdbc7..3401f4c9fb10 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_types.h
@@ -923,6 +923,12 @@ struct display_endpoint_id {
 	enum display_endpoint_type ep_type;
 };
 
+enum backlight_control_type {
+	BACKLIGHT_CONTROL_PWM = 0,
+	BACKLIGHT_CONTROL_VESA_AUX = 1,
+	BACKLIGHT_CONTROL_AMD_AUX = 2,
+};
+
 #if defined(CONFIG_DRM_AMD_SECURE_DISPLAY)
 struct otg_phy_mux {
 	uint8_t phy_output_num;
-- 
2.34.1