diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/5039-drm-amd-display-Only-require-EDID-read-for-HDMI-and-.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/5039-drm-amd-display-Only-require-EDID-read-for-HDMI-and-.patch | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/5039-drm-amd-display-Only-require-EDID-read-for-HDMI-and-.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/5039-drm-amd-display-Only-require-EDID-read-for-HDMI-and-.patch new file mode 100644 index 00000000..9c4d7510 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/5039-drm-amd-display-Only-require-EDID-read-for-HDMI-and-.patch @@ -0,0 +1,43 @@ +From 499b11527b5dc07df496e3533ae217b8992b2275 Mon Sep 17 00:00:00 2001 +From: Harry Wentland <harry.wentland@amd.com> +Date: Thu, 2 Aug 2018 15:32:01 -0400 +Subject: [PATCH 5039/5725] drm/amd/display: Only require EDID read for HDMI + and DVI +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +[Why] +VGA sometimes has trouble retrieving the EDID on very long cables, KVM +switches, or old displays. + +[How] +Only require EDID read for HDMI and DVI and exempt other types (DP, +VGA). We currently don't support VGA but if anyone adds support in the +future this might get overlooked. + +Signed-off-by: Harry Wentland <harry.wentland@amd.com> +Suggested-by: Michel Dänzer <michel@daenzer.net> +Acked-by: Alex Deucher <alexander.deucher@amd.com> +Signed-off-by: Alex Deucher <alexander.deucher@amd.com> +--- + drivers/gpu/drm/amd/display/dc/core/dc_link.c | 3 ++- + 1 file changed, 2 insertions(+), 1 deletion(-) + +diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c +index cbfb1ae..048b8c8 100644 +--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c ++++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c +@@ -753,7 +753,8 @@ bool dc_link_detect(struct dc_link *link, enum dc_detect_reason reason) + * even if we have no EDID in order to go to + * fail-safe mode + */ +- if (!dc_is_dp_signal(link->connector_signal)) ++ if (dc_is_hdmi_signal(link->connector_signal) || ++ dc_is_dvi_signal(link->connector_signal)) + return false; + default: + break; +-- +2.7.4 + |