[Intel-gfx] [v4, 01/14] drm/i915: Fix PIPEDMC disabling for a bigjoiner configuration

[Rudi Heitbaum]

Hi Imre,

Raised the ticket and was able to capture the logs for you.

https://gitlab.freedesktop.org/drm/intel/-/issues/8559

Thanks
Rudi

On Wed, 31 May 2023 at 18:47, Imre Deak <imre.deak at intel.com> wrote:
>
> On Tue, May 30, 2023 at 01:49:07PM +0000, Rudi Heitbaum wrote:
> Hi Rudi,
>
> Could you open a ticket at
> https://gitlab.freedesktop.org/drm/intel/-/issues/new
>
> attaching a dmesg log after booting with drm.debug=0xe, with the
> messages from boot-up until the issue happens?
>
> Thanks,
> Imre
>
> > Hi Imre/Dave,
> >
> > Ref: [v4,01/14] drm/i915: Fix PIPEDMC disabling for a bigjoiner configuration
> >      [git pull] drm fixes for 6.4-rc4
> >      drm-fixes-2023-05-26:
> >      drm fixes for 6.4-rc4
> >
> > This patch has caused a regression between 6.4-rc3 and 6.4-rc4. Other
> > tested kernels include 6.3.4 work fine. Dropping the patch allows the decode
> > playback of media via Kodi. Without dropping the patch - the media
> > starts and stutters then ceases to play.
> >
> > There is an additional issue that 6.4-rc4 audio playback is also failing
> > (where 6.4-rc3 was fine), I have not yet tracked this down.
> >
> > This is all on:
> > DMI: Intel(R) Client Systems NUC12WSKi7/NUC12WSBi7, BIOS WSADL357.0087.2023.0306.1931 03/06/2023
> > 12th Gen Intel(R) Core(TM) i7-1260P (family: 0x6, model: 0x9a, stepping: 0x3)
> > microcode: updated early: 0x429 -> 0x42a, date = 2023-02-14
> >
> > Regards
> >
> > Rudi
> >
> > On Wed, May 10, 2023 at 01:31:18PM +0300, Imre Deak wrote:
> > > For a bigjoiner configuration display->crtc_disable() will be called
> > > first for the slave CRTCs and then for the master CRTC. However slave
> > > CRTCs will be actually disabled only after the master CRTC is disabled
> > > (from the encoder disable hooks called with the master CRTC state).
> > > Hence the slave PIPEDMCs can be disabled only after the master CRTC is
> > > disabled, make this so.
> > >
> > > intel_encoders_post_pll_disable() must be called only for the master
> > > CRTC, as for the other two encoder disable hooks. While at it fix this
> > > up as well. This didn't cause a problem, since
> > > intel_encoders_post_pll_disable() will call the corresponding hook only
> > > for an encoder/connector connected to the given CRTC, however slave
> > > CRTCs will have no associated encoder/connector.
> > >
> > > Fixes: 3af2ff0840be ("drm/i915: Enable a PIPEDMC whenever its corresponding pipe is enabled")
> > > Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> > > Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > > Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > > Signed-off-by: Imre Deak <imre.deak at intel.com>
> > > ---
> > >  drivers/gpu/drm/i915/display/intel_display.c | 12 ++++++++++--
> > >  1 file changed, 10 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> > > index 1d5d42a408035..116fa52290b84 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > > @@ -1702,9 +1702,17 @@ static void hsw_crtc_disable(struct intel_atomic_state *state,
> > >
> > >     intel_disable_shared_dpll(old_crtc_state);
> > >
> > > -   intel_encoders_post_pll_disable(state, crtc);
> > > +   if (!intel_crtc_is_bigjoiner_slave(old_crtc_state)) {
> > > +           struct intel_crtc *slave_crtc;
> > > +
> > > +           intel_encoders_post_pll_disable(state, crtc);
> > >
> > > -   intel_dmc_disable_pipe(i915, crtc->pipe);
> > > +           intel_dmc_disable_pipe(i915, crtc->pipe);
> > > +
> > > +           for_each_intel_crtc_in_pipe_mask(&i915->drm, slave_crtc,
> > > +                                            intel_crtc_bigjoiner_slave_pipes(old_crtc_state))
> > > +                   intel_dmc_disable_pipe(i915, slave_crtc->pipe);
> > > +   }
> > >  }
> > >
> > >  static void i9xx_pfit_enable(const struct intel_crtc_state *crtc_state)