diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3034-drm-amd-display-add-monitor-patch-to-add-T7-delay.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3034-drm-amd-display-add-monitor-patch-to-add-T7-delay.patch | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3034-drm-amd-display-add-monitor-patch-to-add-T7-delay.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3034-drm-amd-display-add-monitor-patch-to-add-T7-delay.patch new file mode 100644 index 00000000..eaa7e6a9 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3034-drm-amd-display-add-monitor-patch-to-add-T7-delay.patch @@ -0,0 +1,58 @@ +From a0048d5fbb6f5e6a1fc395b60ced875242518e5f Mon Sep 17 00:00:00 2001 +From: Anthony Koo <anthony.koo@amd.com> +Date: Wed, 12 Jun 2019 16:30:15 -0400 +Subject: [PATCH 3034/4256] 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 <anthony.koo@amd.com> +Reviewed-by: Charlene Liu <Charlene.Liu@amd.com> +Acked-by: Leo Li <sunpeng.li@amd.com> +--- + 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 2e1d1a8652d8..4279b355c1f4 100644 +--- a/drivers/gpu/drm/amd/display/dc/dc_types.h ++++ b/drivers/gpu/drm/amd/display/dc/dc_types.h +@@ -211,6 +211,7 @@ 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 + |