Commit 923bbfe6 authored by Paul Hsieh's avatar Paul Hsieh Committed by Alex Deucher
Browse files

drm/amd/display: Clear dpcd_sink_ext_caps if not set 



[WHY]
Some eDP panels' ext caps don't set initial values
and the value of dpcd_addr (0x317) is random.
It means that sometimes the eDP can be OLED, miniLED and etc,
and cause incorrect backlight control interface.

[HOW]
Add remove_sink_ext_caps to remove sink ext caps (HDR, OLED and etc)

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: default avatarAnthony Koo <anthony.koo@amd.com>
Acked-by: default avatarAlex Hung <alex.hung@amd.com>
Signed-off-by: default avatarPaul Hsieh <paul.hsieh@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 435f5b36

drivers/gpu/drm/amd/display/dc/dc_types.h

+1 −0
Original line number Diff line number Diff line
@@ -177,6 +177,7 @@ struct dc_panel_patch { 
	unsigned int disable_fams;

	unsigned int skip_avmute;

	unsigned int mst_start_top_delay;

	unsigned int remove_sink_ext_caps;

};



struct dc_edid_caps {

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

+3 −0
Original line number Diff line number Diff line
@@ -1088,6 +1088,9 @@ static bool detect_link_and_local_sink(struct dc_link *link, 
		if (sink->edid_caps.panel_patch.skip_scdc_overwrite)

			link->ctx->dc->debug.hdmi20_disable = true;



		if (sink->edid_caps.panel_patch.remove_sink_ext_caps)

			link->dpcd_sink_ext_caps.raw = 0;



		if (dc_is_hdmi_signal(link->connector_signal))

			read_scdc_caps(link->ddc, link->local_sink);