From 88eac241a1fc500ce5274a09ddc4bd5fc2b5adb6 Mon Sep 17 00:00:00 2001 From: Anthony Koo Date: Wed, 12 Jun 2019 16:30:15 -0400 Subject: [PATCH] drm/amd/display: add monitor patch to add T7 delay [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 Reviewed-by: Charlene Liu Acked-by: Leo Li Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c | 4 ++++ drivers/gpu/drm/amd/display/dc/dc_types.h | 1 + 2 files changed, 5 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c index 46257f0fcbe7..878f47b59d5a 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c @@ -162,6 +162,10 @@ bool edp_receiver_ready_T7(struct dc_link *link) break; udelay(25); //MAx T7 is 50ms } 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; } diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h b/drivers/gpu/drm/amd/display/dc/dc_types.h index 6eabb6491a3d..ce6d73d21cca 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_types.h +++ b/drivers/gpu/drm/amd/display/dc/dc_types.h @@ -202,6 +202,7 @@ struct dc_panel_patch { unsigned int dppowerup_delay; unsigned int extra_t12_ms; unsigned int extra_delay_backlight_off; + unsigned int extra_t7_ms; }; struct dc_edid_caps { -- 2.17.1