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Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.19.8/0975-drm-amd-display-validate-extended-dongle-caps.patch')
-rw-r--r--common/recipes-kernel/linux/linux-yocto-4.19.8/0975-drm-amd-display-validate-extended-dongle-caps.patch41
1 files changed, 41 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.19.8/0975-drm-amd-display-validate-extended-dongle-caps.patch b/common/recipes-kernel/linux/linux-yocto-4.19.8/0975-drm-amd-display-validate-extended-dongle-caps.patch
new file mode 100644
index 00000000..2438f903
--- /dev/null
+++ b/common/recipes-kernel/linux/linux-yocto-4.19.8/0975-drm-amd-display-validate-extended-dongle-caps.patch
@@ -0,0 +1,41 @@
+From b03526cd84439778ea89635b8f584bb5349cc917 Mon Sep 17 00:00:00 2001
+From: Wenjing Liu <Wenjing.Liu@amd.com>
+Date: Wed, 5 Dec 2018 12:14:45 -0500
+Subject: [PATCH 0975/2940] drm/amd/display: validate extended dongle caps
+
+[why]
+Some dongle doesn't have a valid extended dongle caps,
+but we still set the extended dongle caps to be valid.
+This causes validation fails for all timing.
+
+[how]
+If no dp_hdmi_max_pixel_clk is provided,
+don't use extended dongle caps.
+
+Signed-off-by: Wenjing Liu <Wenjing.Liu@amd.com>
+Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
+Reviewed-by: Jun Lei <Jun.Lei@amd.com>
+Acked-by: Abdoulaye Berthe <Abdoulaye.Berthe@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_dp.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+index 0999102e7130..0caacb60b02f 100644
+--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
++++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+@@ -2247,7 +2247,8 @@ static void get_active_converter_info(
+ translate_dpcd_max_bpc(
+ hdmi_color_caps.bits.MAX_BITS_PER_COLOR_COMPONENT);
+
+- link->dpcd_caps.dongle_caps.extendedCapValid = true;
++ if (link->dpcd_caps.dongle_caps.dp_hdmi_max_pixel_clk != 0)
++ link->dpcd_caps.dongle_caps.extendedCapValid = true;
+ }
+
+ break;
+--
+2.17.1
+