drm/amd/display: Change Brightness Control Priority

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 <[email protected]> Signed-off-by: Muyuan Yang <[email protected]> Signed-off-by: Fangzhi Zuo <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
lutzbichler · Dec 8, 2024 · 6dca31a · 6dca31a
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diff --git 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
@@ -922,6 +922,12 @@ 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;