diff options
Diffstat (limited to '0005-drm-i915-Fix-modesetting-in-case-of-unexpected-AUX-t.patch')
| -rw-r--r-- | 0005-drm-i915-Fix-modesetting-in-case-of-unexpected-AUX-t.patch | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/0005-drm-i915-Fix-modesetting-in-case-of-unexpected-AUX-t.patch b/0005-drm-i915-Fix-modesetting-in-case-of-unexpected-AUX-t.patch deleted file mode 100644 index 64df38e77696..000000000000 --- a/0005-drm-i915-Fix-modesetting-in-case-of-unexpected-AUX-t.patch +++ /dev/null @@ -1,53 +0,0 @@ -From 702d986d2a3b347a2d732a3fbfc9838dc70a2be7 Mon Sep 17 00:00:00 2001 -From: Imre Deak <imre.deak@intel.com> -Date: Tue, 13 Apr 2021 02:24:12 +0300 -Subject: [PATCH 5/6] drm/i915: Fix modesetting in case of unexpected AUX - timeouts -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -In case AUX failures happen unexpectedly during a modeset, the driver -should still complete the modeset. In particular the driver should -perform the link training sequence steps even in case of an AUX failure, -as this sequence also includes port initialization steps. Not doing that -can leave the port/pipe in a broken state and lead for instance to a -flip done timeout. - -Fix this by continuing with link training (in a no-LTTPR mode) if the -DPRX DPCD readout failed for some reason at the beginning of link -training. After a successful connector detection we already have the -DPCD read out and cached, so the failed repeated read for it should not -cause a problem. Note that a partial AUX read could in theory partly -overwrite the cached DPCD (and return error) but this overwrite should -not happen if the returned values are corrupted (due to a timeout or -some other IO error). - -Kudos to Ville to root cause the problem. - -Fixes: 7dffbdedb96a ("drm/i915: Disable LTTPR support when the DPCD rev < 1.4") -References: https://gitlab.freedesktop.org/drm/intel/-/issues/3308 -Cc: stable@vger.kernel.org # 5.11 -Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> -Signed-off-by: Imre Deak <imre.deak@intel.com> ---- - drivers/gpu/drm/i915/display/intel_dp_link_training.c | 3 ++- - 1 file changed, 2 insertions(+), 1 deletion(-) - -diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c b/drivers/gpu/drm/i915/display/intel_dp_link_training.c -index e6532ea5757b..6f2cb9d55e1b 100644 ---- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c -+++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c -@@ -843,7 +843,8 @@ void intel_dp_start_link_train(struct intel_dp *intel_dp, - int lttpr_count = intel_dp_init_lttpr_and_dprx_caps(intel_dp); - - if (lttpr_count < 0) -- return; -+ /* Still continue with enabling the port and link training. */ -+ lttpr_count = 0; - - if (!intel_dp_link_train_all_phys(intel_dp, crtc_state, lttpr_count)) - intel_dp_schedule_fallback_link_training(intel_dp, crtc_state); --- -2.31.1 - |