diff options
Diffstat (limited to 'common/recipes-kernel/linux/files/0893-drm-amd-dal-Fixed-DP-passive-dongle-not-light-up-iss.patch')
| -rw-r--r-- | common/recipes-kernel/linux/files/0893-drm-amd-dal-Fixed-DP-passive-dongle-not-light-up-iss.patch | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/files/0893-drm-amd-dal-Fixed-DP-passive-dongle-not-light-up-iss.patch b/common/recipes-kernel/linux/files/0893-drm-amd-dal-Fixed-DP-passive-dongle-not-light-up-iss.patch new file mode 100644 index 00000000..79ad2581 --- /dev/null +++ b/common/recipes-kernel/linux/files/0893-drm-amd-dal-Fixed-DP-passive-dongle-not-light-up-iss.patch @@ -0,0 +1,35 @@ +From f9c3ad9cf9ffb05ce4f2b0ea5f58f81415594c57 Mon Sep 17 00:00:00 2001 +From: Yongqiang Sun <yongqiang.sun@amd.com> +Date: Wed, 9 Mar 2016 14:56:16 -0500 +Subject: [PATCH 0893/1110] drm/amd/dal: Fixed DP passive dongle not light up + issue + +Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com> +Acked-by: Harry Wentland <harry.wentland@amd.com> +Signed-off-by: Alex Deucher <alexander.deucher@amd.com> +--- + drivers/gpu/drm/amd/dal/dc/core/dc_link.c | 8 +++++++- + 1 file changed, 7 insertions(+), 1 deletion(-) + +diff --git a/drivers/gpu/drm/amd/dal/dc/core/dc_link.c b/drivers/gpu/drm/amd/dal/dc/core/dc_link.c +index 0232956..fd406f9 100644 +--- a/drivers/gpu/drm/amd/dal/dc/core/dc_link.c ++++ b/drivers/gpu/drm/amd/dal/dc/core/dc_link.c +@@ -99,7 +99,13 @@ static bool program_hpd_filter( + case SIGNAL_TYPE_DISPLAY_PORT: + case SIGNAL_TYPE_DISPLAY_PORT_MST: + /* Program hpd filter to allow DP signal to settle */ +- delay_on_connect_in_ms = 20; ++ /* 500: not able to detect MST <-> SST switch as HPD is low for ++ * only 100ms on DELL U2413 ++ * 0: some passive dongle still show aux mode instead of i2c ++ * 20-50:not enough to hide bouncing HPD with passive dongle. ++ * also see intermittent i2c read issues. ++ */ ++ delay_on_connect_in_ms = 80; + delay_on_disconnect_in_ms = 0; + break; + case SIGNAL_TYPE_LVDS: +-- +2.7.4 + |