Commit 08f133e9 authored by Derek Lai's avatar Derek Lai Committed by Alex Deucher
Browse files

drm/amd/display: Write default Vesa Aux backlight control in dmub 



[WHY]
Some OLED panels require driver to write Aux BL before link training or
turning on backlight; otherwise monitor brightness will change.

[HOW]
Write the default Vesa Aux backlight control in dmub.

Reviewed-by: default avatarWenjing Liu <wenjing.liu@amd.com>
Signed-off-by: default avatarDerek Lai <Derek.Lai@amd.com>
Signed-off-by: default avatarAlex Hung <alex.hung@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 201648dc

drivers/gpu/drm/amd/display/dc/link/link_detection.c

+1 −1
Original line number Diff line number Diff line
@@ -989,7 +989,7 @@ static bool detect_link_and_local_sink(struct dc_link *link, 
			(link->dpcd_sink_ext_caps.bits.oled == 1)) {

			dpcd_set_source_specific_data(link);

			msleep(post_oui_delay);

			set_default_brightness_aux(link);

			set_default_brightness(link);

		}



		return true;

drivers/gpu/drm/amd/display/dc/link/link_dpms.c

+2 −2
Original line number Diff line number Diff line
@@ -2115,7 +2115,7 @@ static enum dc_status enable_link_dp(struct dc_state *state, 
		skip_video_pattern = false;



	if (stream->sink_patches.oled_optimize_display_on)

		set_default_brightness_aux(link);

		set_default_brightness(link);



	if (perform_link_training_with_retries(link_settings,

					       skip_video_pattern,
@@ -2141,7 +2141,7 @@ static enum dc_status enable_link_dp(struct dc_state *state, 
		link->dpcd_sink_ext_caps.bits.sdr_aux_backlight_control == 1 ||

		link->dpcd_sink_ext_caps.bits.hdr_aux_backlight_control == 1) {

		if (!stream->sink_patches.oled_optimize_display_on) {

			set_default_brightness_aux(link);

			set_default_brightness(link);

			if (link->dpcd_sink_ext_caps.bits.oled == 1)

				msleep(bl_oled_enable_delay);

			edp_backlight_enable_aux(link, true);

drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c

+1 −1
Original line number Diff line number Diff line
@@ -2167,7 +2167,7 @@ void detect_edp_sink_caps(struct dc_link *link) 
	link->dpcd_caps.set_power_state_capable_edp =

				(general_edp_cap & DP_EDP_SET_POWER_CAP) ? true : false;



	set_default_brightness_aux(link);

	set_default_brightness(link);



	core_link_read_dpcd(link, DP_EDP_DPCD_REV,

		&link->dpcd_caps.edp_rev,

drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c

+23 −3
Original line number Diff line number Diff line
@@ -50,6 +50,11 @@ static const uint8_t DP_VGA_LVDS_CONVERTER_ID_2[] = "sivarT"; 
/* Nutmeg */

static const uint8_t DP_VGA_LVDS_CONVERTER_ID_3[] = "dnomlA";



static const unsigned int pwr_default_min_brightness_millinits = 1000;

static const unsigned int pwr_default_sdr_brightness_millinits = 270000;

static const unsigned int pwr_default_min_backlight_pwm = 0xC0C;

static const unsigned int pwr_default_max_backlight_pwm = 0xFFFF;



void dp_set_panel_mode(struct dc_link *link, enum dp_panel_mode panel_mode)

{

	union dpcd_edp_config edp_config_set;
@@ -309,7 +314,7 @@ static bool read_default_bl_aux(struct dc_link *link, uint32_t *backlight_millin 
	return true;

}



bool set_default_brightness_aux(struct dc_link *link)

bool set_default_brightness(struct dc_link *link)

{

	uint32_t default_backlight;
@@ -320,6 +325,21 @@ bool set_default_brightness_aux(struct dc_link *link) 
		if (default_backlight < 1000 || default_backlight > 5000000)

			default_backlight = 150000;



		if (link->backlight_control_type == BACKLIGHT_CONTROL_VESA_AUX &&

			link->dc->caps.dmub_caps.aux_backlight_support) {

			struct set_backlight_level_params backlight_level_params = { 0 };



			backlight_level_params.aux_inst =  link->ddc->ddc_pin->hw_info.ddc_channel;

			backlight_level_params.control_type = BACKLIGHT_CONTROL_VESA_AUX;

			backlight_level_params.backlight_pwm_u16_16 = default_backlight;

			backlight_level_params.transition_time_in_ms = 0;

			// filled in the driver BL default values

			backlight_level_params.min_luminance = pwr_default_min_brightness_millinits;

			backlight_level_params.max_luminance = pwr_default_sdr_brightness_millinits;

			backlight_level_params.min_backlight_pwm = pwr_default_min_backlight_pwm;

			backlight_level_params.max_backlight_pwm = pwr_default_max_backlight_pwm;

			return edp_set_backlight_level(link, &backlight_level_params);

		} else

			return edp_set_backlight_level_nits(link, true,

					default_backlight, 0);

	}

drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.h

+1 −1
Original line number Diff line number Diff line
@@ -29,7 +29,7 @@ 


enum dp_panel_mode dp_get_panel_mode(struct dc_link *link);

void dp_set_panel_mode(struct dc_link *link, enum dp_panel_mode panel_mode);

bool set_default_brightness_aux(struct dc_link *link);

bool set_default_brightness(struct dc_link *link);

bool is_smartmux_suported(struct dc_link *link);

void edp_panel_backlight_power_on(struct dc_link *link, bool wait_for_hpd);

int edp_get_backlight_level(const struct dc_link *link);