Message ID | 20210105093347.565527-1-koba.ko@canonical.com |
---|---|
Headers | show |
Series | UBUNTU: SAUCE: Fix the video can't output through WD19TB connected with TGL platform during cold-boot | expand |
On 5.1.2021 11.33, Koba Ko wrote: > BugLink: https://bugs.launchpad.net/bugs/1910211 > > [Impact] > After Apply the patches from https://www.spinics.net/lists/intel-gfx/msg248700.html, > the TGL platform would have the failure rate(1/20) on outputting the video through WD19TB. > > [Fix] > The patch is provided by Imre(https://gitlab.freedesktop.org/drm/intel/-/issues/2801#note_740352). > If there's no lttpr in the link chain, the DRM driver wouldn't configure the transparent mode again. > > [Test Case] > 1. Connected the WD19TB with the TGL platform and > connected the external monitor on WD19TB with HDMI/Displayport. > 2. Don't plug the external monitor on the TGL platform, so there's only one monitor on WD19TB. > 3. Cold boot the TGL platform. > 4. Check the monitor can be blinked and the video can output to the monitor. > > [Where problems could occur] > As per Imre's comment, this may be caused by the dock. > In the future if the WD19TB's firmware is updated, we may encounter the same issue again. > > > Imre Deak (1): > UBUNTU: SAUCE: drm/i915/dp: Prevent setting LTTPR mode if no LTTPR is > detected > > .../drm/i915/display/intel_dp_link_training.c | 36 ++++++++----------- > 1 file changed, 15 insertions(+), 21 deletions(-) > Applied to oem-5.10, thanks
On Tue, Jan 05, 2021 at 05:33:46PM +0800, Koba Ko wrote: > BugLink: https://bugs.launchpad.net/bugs/1910211 > > [Impact] > After Apply the patches from https://www.spinics.net/lists/intel-gfx/msg248700.html, > the TGL platform would have the failure rate(1/20) on outputting the video through WD19TB. > > [Fix] > The patch is provided by Imre(https://gitlab.freedesktop.org/drm/intel/-/issues/2801#note_740352). > If there's no lttpr in the link chain, the DRM driver wouldn't configure the transparent mode again. > > [Test Case] > 1. Connected the WD19TB with the TGL platform and > connected the external monitor on WD19TB with HDMI/Displayport. > 2. Don't plug the external monitor on the TGL platform, so there's only one monitor on WD19TB. > 3. Cold boot the TGL platform. > 4. Check the monitor can be blinked and the video can output to the monitor. > > [Where problems could occur] > As per Imre's comment, this may be caused by the dock. > In the future if the WD19TB's firmware is updated, we may encounter the same issue again. > > > Imre Deak (1): > UBUNTU: SAUCE: drm/i915/dp: Prevent setting LTTPR mode if no LTTPR is > detected Applied to unstable/5.11. Thanks, -Andrea