diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3781-drm-amdgpu-dce-Don-t-turn-off-DP-sink-when-disconnec.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3781-drm-amdgpu-dce-Don-t-turn-off-DP-sink-when-disconnec.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3781-drm-amdgpu-dce-Don-t-turn-off-DP-sink-when-disconnec.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3781-drm-amdgpu-dce-Don-t-turn-off-DP-sink-when-disconnec.patch new file mode 100644 index 00000000..938e8cbd --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3781-drm-amdgpu-dce-Don-t-turn-off-DP-sink-when-disconnec.patch @@ -0,0 +1,42 @@ +From f9552a577c91f1424cb54eb53fcccea0d4ca9fec Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <michel.daenzer@amd.com> +Date: Fri, 9 Mar 2018 18:26:18 +0100 +Subject: [PATCH 3781/4131] drm/amdgpu/dce: Don't turn off DP sink when + disconnected +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Turning off the sink in this case causes various issues, because +userspace expects it to stay on until it turns it off explicitly. + +Instead, turn the sink off and back on when a display is connected +again. This dance seems necessary for link training to work correctly. + +Bugzilla: https://bugs.freedesktop.org/105308 +Cc: stable@vger.kernel.org +Reviewed-by: Alex Deucher <alexander.deucher@amd.com> +Signed-off-by: Michel Dänzer <michel.daenzer@amd.com> +--- + drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c | 2 ++ + 1 file changed, 2 insertions(+) + +diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c +index 6ab01c4..cdf9b0c 100644 +--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c ++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c +@@ -69,9 +69,11 @@ void amdgpu_connector_hotplug(struct drm_connector *connector) + /* don't do anything if sink is not display port, i.e., + * passive dp->(dvi|hdmi) adaptor + */ ++ + if (dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT && + amdgpu_display_hpd_sense(adev, amdgpu_connector->hpd.hpd) && + amdgpu_atombios_dp_needs_link_train(amdgpu_connector)) { ++ + /* Don't start link training before we have the DPCD */ + if (amdgpu_atombios_dp_get_dpcd(amdgpu_connector)) + return; +-- +2.7.4 + |