| Message ID | 20230222141755.1060162-1-wse@tuxedocomputers.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | Add quirk to disable PSR 2 on Tongfang PHxTxX1 and PHxTQx1 | expand |
Am 22.02.23 um 15:17 schrieb Werner Sembach: > On these Barebones PSR 2 is recognized as supported but is very buggy: > - Upper third of screen does sometimes not updated, resulting in > disappearing cursors or ghosts of already closed Windows saying behind. > - Approximately 40 px from the bottom edge a 3 pixel wide strip of randomly > colored pixels is flickering. > > PSR 1 is working fine however. > > This patchset introduces a new quirk to disable PSR 2 specifically on known > buggy devices and applies it to the Tongfang PHxTxX1 and PHxTQx1 barebones. > > Signed-off-by: Werner Sembach <wse@tuxedocomputers.com> > Cc: <stable@vger.kernel.org> > > Parralel to this there is a patch fixing the root cause of this issue: https://gitlab.freedesktop.org/drm/intel/-/issues/7347#note_1785094 So this quirk might only be relevant for stable kernels, depending on when that other patch gets merged.
On Wed, 2023-02-22 at 15:17 +0100, Werner Sembach wrote: > On these Barebones PSR 2 is recognized as supported but is very > buggy: > - Upper third of screen does sometimes not updated, resulting in > disappearing cursors or ghosts of already closed Windows saying > behind. > - Approximately 40 px from the bottom edge a 3 pixel wide strip of > randomly > colored pixels is flickering. > > PSR 1 is working fine however. > > This patchset introduces a new quirk to disable PSR 2 specifically on > known > buggy devices and applies it to the Tongfang PHxTxX1 and PHxTQx1 > barebones. I've been thinking something similar as there is still at least one issue which seems to be like panel side issue: https://gitlab.freedesktop.org/drm/intel/-/issues/7836 Did you considered dpcd_quirk_list in drivers/gpu/drm/drm_dp_helper.c? I'm not sure which one is more correct though... > > Signed-off-by: Werner Sembach <wse@tuxedocomputers.com> > Cc: <stable@vger.kernel.org> > >
Am 23.02.23 um 19:26 schrieb Hogander, Jouni: > On Wed, 2023-02-22 at 15:17 +0100, Werner Sembach wrote: >> On these Barebones PSR 2 is recognized as supported but is very >> buggy: >> - Upper third of screen does sometimes not updated, resulting in >> disappearing cursors or ghosts of already closed Windows saying >> behind. >> - Approximately 40 px from the bottom edge a 3 pixel wide strip of >> randomly >> colored pixels is flickering. >> >> PSR 1 is working fine however. >> >> This patchset introduces a new quirk to disable PSR 2 specifically on >> known >> buggy devices and applies it to the Tongfang PHxTxX1 and PHxTQx1 >> barebones. > I've been thinking something similar as there is still at least one > issue which seems to be like panel side issue: > > https://gitlab.freedesktop.org/drm/intel/-/issues/7836 > > Did you considered dpcd_quirk_list in drivers/gpu/drm/drm_dp_helper.c? > > I'm not sure which one is more correct though... Imho, since the proper fix lies within the Intel driver the quirk should also lie within the Intel driver, because even if the panel has the same problem combined with an AMD or NVIDIA card the proper fix for them will most likely be land in the same kernel version. So there could be a period where you no longer want the quirk for devices combining the panel with an Intel gpu but still with an AMD GPU or vice versa. > >> Signed-off-by: Werner Sembach <wse@tuxedocomputers.com> >> Cc: <stable@vger.kernel.org> >> >>
Am 23.02.23 um 19:56 schrieb Werner Sembach: > > Am 23.02.23 um 19:26 schrieb Hogander, Jouni: >> On Wed, 2023-02-22 at 15:17 +0100, Werner Sembach wrote: >>> On these Barebones PSR 2 is recognized as supported but is very >>> buggy: >>> - Upper third of screen does sometimes not updated, resulting in >>> disappearing cursors or ghosts of already closed Windows saying >>> behind. >>> - Approximately 40 px from the bottom edge a 3 pixel wide strip of >>> randomly >>> colored pixels is flickering. >>> >>> PSR 1 is working fine however. >>> >>> This patchset introduces a new quirk to disable PSR 2 specifically on >>> known >>> buggy devices and applies it to the Tongfang PHxTxX1 and PHxTQx1 >>> barebones. >> I've been thinking something similar as there is still at least one >> issue which seems to be like panel side issue: >> >> https://gitlab.freedesktop.org/drm/intel/-/issues/7836 >> >> Did you considered dpcd_quirk_list in drivers/gpu/drm/drm_dp_helper.c? >> >> I'm not sure which one is more correct though... > Imho, since the proper fix lies within the Intel driver the quirk should also > lie within the Intel driver, because even if the panel has the same problem > combined with an AMD or NVIDIA card the proper fix for them will most likely > be land in the same kernel version. So there could be a period where you no > longer want the quirk for devices combining the panel with an Intel gpu but > still with an AMD GPU or vice versa. *the proper fix for them will most likely not be in the same kernel version. >> >>> Signed-off-by: Werner Sembach <wse@tuxedocomputers.com> >>> Cc: <stable@vger.kernel.org> >>> >>>
On Thu, 2023-02-23 at 20:02 +0100, Werner Sembach wrote: > > Am 23.02.23 um 19:56 schrieb Werner Sembach: > > > > Am 23.02.23 um 19:26 schrieb Hogander, Jouni: > > > On Wed, 2023-02-22 at 15:17 +0100, Werner Sembach wrote: > > > > On these Barebones PSR 2 is recognized as supported but is very > > > > buggy: > > > > - Upper third of screen does sometimes not updated, resulting > > > > in > > > > disappearing cursors or ghosts of already closed Windows saying > > > > behind. > > > > - Approximately 40 px from the bottom edge a 3 pixel wide strip > > > > of > > > > randomly > > > > colored pixels is flickering. > > > > > > > > PSR 1 is working fine however. > > > > > > > > This patchset introduces a new quirk to disable PSR 2 > > > > specifically on > > > > known > > > > buggy devices and applies it to the Tongfang PHxTxX1 and > > > > PHxTQx1 > > > > barebones. > > > I've been thinking something similar as there is still at least > > > one > > > issue which seems to be like panel side issue: > > > > > > https://gitlab.freedesktop.org/drm/intel/-/issues/7836 > > > > > > Did you considered dpcd_quirk_list in > > > drivers/gpu/drm/drm_dp_helper.c? > > > > > > I'm not sure which one is more correct though... > > Imho, since the proper fix lies within the Intel driver the quirk > > should also > > lie within the Intel driver, because even if the panel has the same > > problem > > combined with an AMD or NVIDIA card the proper fix for them will > > most likely > > be land in the same kernel version. So there could be a period > > where you no > > longer want the quirk for devices combining the panel with an Intel > > gpu but > > still with an AMD GPU or vice versa. > *the proper fix for them will most likely not be in the same kernel > version. Yeah, you are right here. Let's target fixing rootcause for your setup. First patch from your set could be anyways used for issue mentioned above. > > > > > > > Signed-off-by: Werner Sembach <wse@tuxedocomputers.com> > > > > Cc: <stable@vger.kernel.org> > > > > > > > > BR, Jouni Högander
On these Barebones PSR 2 is recognized as supported but is very buggy: - Upper third of screen does sometimes not updated, resulting in disappearing cursors or ghosts of already closed Windows saying behind. - Approximately 40 px from the bottom edge a 3 pixel wide strip of randomly colored pixels is flickering. PSR 1 is working fine however. This patchset introduces a new quirk to disable PSR 2 specifically on known buggy devices and applies it to the Tongfang PHxTxX1 and PHxTQx1 barebones. Signed-off-by: Werner Sembach <wse@tuxedocomputers.com> Cc: <stable@vger.kernel.org>