On Mon, Sep 14, 2020 at 07:57:34PM +0000, Souza, Jose wrote:
> On Mon, 2020-09-14 at 17:24 +0300, Ville Syrjälä wrote:
> > On Mon, Aug 31, 2020 at 06:09:22PM -0700, José Roberto de Souza wrote:
> > > In case PSR2 is disabled by debugfs dc3co_enabled and
> > > psr2_sel_fetch_enabled were still being set causing some code paths
> > > to be executed were it should not.
> > > We have tests for PSR1 and PSR2 so keep those features disabled when
> > > PSR1 is active but PSR2 is supported is important.
> > >
> > > Cc: Gwan-gyeong Mun <
> > > gwan-gyeong.mun@xxxxxxxxx
> > > >
> > > Cc: Ville Syrjälä <
> > > ville.syrjala@xxxxxxxxxxxxxxx
> > > >
> > > Signed-off-by: José Roberto de Souza <
> > > jose.souza@xxxxxxxxx
> > > >
> > > ---
> > > drivers/gpu/drm/i915/display/intel_psr.c | 11 +++++++----
> > > 1 file changed, 7 insertions(+), 4 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
> > > index 4e09ae61d4aa..6698d0209879 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_psr.c
> > > +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> > > @@ -962,12 +962,14 @@ static void intel_psr_enable_locked(struct drm_i915_private *dev_priv,
> > > dev_priv->psr.psr2_enabled = intel_psr2_enabled(dev_priv, crtc_state);
> > > dev_priv->psr.busy_frontbuffer_bits = 0;
> > > dev_priv->psr.pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe;
> > > - dev_priv->psr.dc3co_enabled = !!crtc_state->dc3co_exitline;
> > > + dev_priv->psr.dc3co_enabled = !!crtc_state->dc3co_exitline &&
> > > + dev_priv->psr.psr2_enabled;
> > > dev_priv->psr.transcoder = crtc_state->cpu_transcoder;
> > > /* DC5/DC6 requires at least 6 idle frames */
> > > val = usecs_to_jiffies(intel_get_frame_time_us(crtc_state) * 6);
> > > dev_priv->psr.dc3co_exit_delay = val;
> > > - dev_priv->psr.psr2_sel_fetch_enabled = crtc_state->enable_psr2_sel_fetch;
> > > + dev_priv->psr.psr2_sel_fetch_enabled = crtc_state->enable_psr2_sel_fetch &&
> > > + dev_priv->psr.psr2_enabled;
> > >
> > > /*
> > > * If a PSR error happened and the driver is reloaded, the EDP_PSR_IIR
> > > @@ -1178,7 +1180,7 @@ void intel_psr2_program_trans_man_trk_ctl(const struct intel_crtc_state *crtc_st
> > > struct i915_psr *psr = &dev_priv->psr;
> > >
> > > if (!HAS_PSR2_SEL_FETCH(dev_priv) ||
> > > - !crtc_state->enable_psr2_sel_fetch)
> > > + !dev_priv->psr.psr2_sel_fetch_enabled)
> > > return;
> > >
> > > intel_de_write(dev_priv, PSR2_MAN_TRK_CTL(psr->transcoder),
> > > @@ -1189,8 +1191,9 @@ void intel_psr2_sel_fetch_update(struct intel_atomic_state *state,
> > > struct intel_crtc *crtc)
> > > {
> > > struct intel_crtc_state *crtc_state = intel_atomic_get_new_crtc_state(state, crtc);
> > > + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> > >
> > > - if (!crtc_state->enable_psr2_sel_fetch)
> > > + if (!dev_priv->psr.psr2_sel_fetch_enabled)
> >
> > This looks rather sketchy. AFAICS this gets called during atomic_check()
> > so looking at stuff outside the crtc state is very suspicious.
>
> This is called after the functions that change the PSR state so no issues, also we can't really on information in CRTC state, as PSR is only enabled
> if supported by state, i915 PSR parameter and PSR debug fs value.
I see it getting called from intel_crtc_atomic_check(). Confused.
Am I missing some other patches?
>
> >
> > > return;
> > >
> > > crtc_state->psr2_man_track_ctl = PSR2_MAN_TRK_CTL_ENABLE |
> > > --
> > > 2.28.0
> >
> >
--
Ville Syrjälä
Intel
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