drm/amd/display: add monitor patch to add T7 delay (88eac241) · Commits · 戴 / test

[Why] Specifically to one panel, TCON is able to accept active video signal quickly, but the Source Driver requires 2-3 frames of extra time. It is a Panel issue since TCON needs to take care of all Sink requirements including Source Driver. But in this case it does not. Customer is asking to add fixed T7 delay as panel workaround. [How] Add monitor specific patch to add T7 delay Signed-off-by:

Anthony Koo <anthony.koo@amd.com> Reviewed-by:

Charlene Liu <Charlene.Liu@amd.com> Acked-by:

Leo Li <sunpeng.li@amd.com> Signed-off-by:

Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c

+4 −0

Original line number	Original line	Diff line number	Diff line
	@@ -162,6 +162,10 @@ bool edp_receiver_ready_T7(struct dc_link *link)
	break;		break;
	udelay(25); //MAx T7 is 50ms		udelay(25); //MAx T7 is 50ms
	} while (++tries < 300);		} while (++tries < 300);

			if (link->local_sink->edid_caps.panel_patch.extra_t7_ms > 0)
			udelay(link->local_sink->edid_caps.panel_patch.extra_t7_ms * 1000);

	return result;		return result;
	}		}

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

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -202,6 +202,7 @@ struct dc_panel_patch {
	unsigned int dppowerup_delay;		unsigned int dppowerup_delay;
	unsigned int extra_t12_ms;		unsigned int extra_t12_ms;
	unsigned int extra_delay_backlight_off;		unsigned int extra_delay_backlight_off;
			unsigned int extra_t7_ms;
	};		};

	struct dc_edid_caps {		struct dc_edid_caps {

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