drm/dp: Add DP_DPCD_QUIRK_NO_SINK_COUNT (7974033e) · Commits · 戴 / test

CH7511 eDP->LVDS bridge doesn't seem to set SINK_COUNT properly causing i915 to detect it as disconnected. Add a quirk to ignore SINK_COUNT on these devices. Cc: David S. <david@majinbuu.com> Cc: Peteris Rudzusiks <peteris.rudzusiks@gmail.com> Tested-by:

Peteris Rudzusiks <peteris.rudzusiks@gmail.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105406 Signed-off-by:

Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190528140650.19230-1-ville.syrjala@linux.intel.com Acked-by: Jani Nikula <jani.nikula@intel.com> #irc

drivers/gpu/drm/drm_dp_helper.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -1280,7 +1280,9 @@ static const struct dpcd_quirk dpcd_quirk_list[] = {
		/* LG LP140WF6-SPM1 eDP panel */
		{ OUI(0x00, 0x22, 0xb9), DEVICE_ID('s', 'i', 'v', 'a', 'r', 'T'), false, BIT(DP_DPCD_QUIRK_CONSTANT_N) },
		/* Apple panels need some additional handling to support PSR */
		{ OUI(0x00, 0x10, 0xfa), DEVICE_ID_ANY, false, BIT(DP_DPCD_QUIRK_NO_PSR) }
		{ OUI(0x00, 0x10, 0xfa), DEVICE_ID_ANY, false, BIT(DP_DPCD_QUIRK_NO_PSR) },
		/* CH7511 seems to leave SINK_COUNT zeroed */
		{ OUI(0x00, 0x00, 0x00), DEVICE_ID('C', 'H', '7', '5', '1', '1'), false, BIT(DP_DPCD_QUIRK_NO_SINK_COUNT) },
		};

		#undef OUI

include/drm/drm_dp_helper.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -1414,6 +1414,13 @@ enum drm_dp_quirk {
		* driver still need to implement proper handling for such device.
		*/
		DP_DPCD_QUIRK_NO_PSR,
		/**
		* @DP_DPCD_QUIRK_NO_SINK_COUNT:
		*
		* The device does not set SINK_COUNT to a non-zero value.
		* The driver should ignore SINK_COUNT during detection.
		*/
		DP_DPCD_QUIRK_NO_SINK_COUNT,
		};

		/**

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