[Intel-gfx] [PATCH 1/2] drm/i915/mtl: Initial display workarounds
Matt Atwood
matthew.s.atwood at intel.com
Thu Dec 1 22:14:44 UTC 2022
On Thu, Dec 01, 2022 at 12:51:33PM +0000, Tvrtko Ursulin wrote:
>
> On 30/11/2022 23:17, Matt Atwood wrote:
> > From: Jouni Högander <jouni.hogander at intel.com>
> >
> > This patch introduces initial workarounds for mtl platform
> >
> > Bspec: 66624
> >
> > Signed-off-by: Matt Atwood <matthew.s.atwood at intel.com>
> > Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
> > ---
> > drivers/gpu/drm/i915/display/intel_fbc.c | 4 +++-
> > drivers/gpu/drm/i915/display/intel_hdmi.c | 3 ++-
> > drivers/gpu/drm/i915/display/intel_psr.c | 27 ++++++++++++++++-------
> > drivers/gpu/drm/i915/i915_drv.h | 4 ++++
> > 4 files changed, 28 insertions(+), 10 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
> > index b5ee5ea0d010..8f269553d826 100644
> > --- a/drivers/gpu/drm/i915/display/intel_fbc.c
> > +++ b/drivers/gpu/drm/i915/display/intel_fbc.c
> > @@ -1095,7 +1095,9 @@ static int intel_fbc_check_plane(struct intel_atomic_state *state,
> > }
> > /* Wa_14016291713 */
> > - if (IS_DISPLAY_VER(i915, 12, 13) && crtc_state->has_psr) {
> > + if ((IS_DISPLAY_VER(i915, 12, 13) ||
> > + IS_MTL_DISPLAY_STEP(i915, STEP_A0, STEP_C0)) &&
> > + crtc_state->has_psr) {
> > plane_state->no_fbc_reason = "PSR1 enabled (Wa_14016291713)";
> > return 0;
> > }
> > diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
> > index e82f8a07e2b0..efa2da080f62 100644
> > --- a/drivers/gpu/drm/i915/display/intel_hdmi.c
> > +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
> > @@ -537,7 +537,8 @@ void hsw_write_infoframe(struct intel_encoder *encoder,
> > 0);
> > /* Wa_14013475917 */
> > - if (DISPLAY_VER(dev_priv) == 13 && crtc_state->has_psr &&
> > + if ((DISPLAY_VER(dev_priv) == 13 ||
> > + IS_MTL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0)) && crtc_state->has_psr &&
> > type == DP_SDP_VSC)
> > return;
> > diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
> > index 5b678916e6db..7982157fb1ff 100644
> > --- a/drivers/gpu/drm/i915/display/intel_psr.c
> > +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> > @@ -797,7 +797,7 @@ static bool psr2_granularity_check(struct intel_dp *intel_dp,
> > return intel_dp->psr.su_y_granularity == 4;
> > /*
> > - * adl_p and display 14+ platforms has 1 line granularity.
> > + * adl_p and mtl platforms has 1 line granularity.
> > * For other platforms with SW tracking we can adjust the y coordinates
> > * to match sink requirement if multiple of 4.
> > */
> > @@ -1170,11 +1170,14 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
> > PSR2_ADD_VERTICAL_LINE_COUNT);
> > /*
> > - * Wa_16014451276:adlp
> > + * Wa_16014451276:adlp,mtl[a0,b0]
> > * All supported adlp panels have 1-based X granularity, this may
> > * cause issues if non-supported panels are used.
> > */
> > - if (IS_ALDERLAKE_P(dev_priv))
> > + if (IS_MTL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
> > + intel_de_rmw(dev_priv, MTL_CHICKEN_TRANS(cpu_transcoder), 0,
> > + ADLP_1_BASED_X_GRANULARITY);
> > + else if (IS_ALDERLAKE_P(dev_priv))
> > intel_de_rmw(dev_priv, CHICKEN_TRANS(cpu_transcoder), 0,
> > ADLP_1_BASED_X_GRANULARITY);
> > @@ -1185,8 +1188,12 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
> > TRANS_SET_CONTEXT_LATENCY_MASK,
> > TRANS_SET_CONTEXT_LATENCY_VALUE(1));
> > - /* Wa_16012604467:adlp */
> > - if (IS_ALDERLAKE_P(dev_priv))
> > + /* Wa_16012604467:adlp,mtl[a0,b0] */
> > + if (IS_MTL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
> > + intel_de_rmw(dev_priv,
> > + MTL_CLKGATE_DIS_TRANS(cpu_transcoder), 0,
> > + MTL_CLKGATE_DIS_TRANS_DMASC_GATING_DIS);
> > + else if (IS_ALDERLAKE_P(dev_priv))
> > intel_de_rmw(dev_priv, CLKGATE_DIS_MISC, 0,
> > CLKGATE_DIS_MISC_DMASC_GATING_DIS);
> > @@ -1362,8 +1369,12 @@ static void intel_psr_disable_locked(struct intel_dp *intel_dp)
> > TRANS_SET_CONTEXT_LATENCY(intel_dp->psr.transcoder),
> > TRANS_SET_CONTEXT_LATENCY_MASK, 0);
> > - /* Wa_16012604467:adlp */
> > - if (IS_ALDERLAKE_P(dev_priv))
> > + /* Wa_16012604467:adlp,mtl[a0,b0] */
> > + if (IS_MTL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
> > + intel_de_rmw(dev_priv,
> > + MTL_CLKGATE_DIS_TRANS(intel_dp->psr.transcoder),
> > + MTL_CLKGATE_DIS_TRANS_DMASC_GATING_DIS, 0);
> > + else if (IS_ALDERLAKE_P(dev_priv))
> > intel_de_rmw(dev_priv, CLKGATE_DIS_MISC,
> > CLKGATE_DIS_MISC_DMASC_GATING_DIS, 0);
> > @@ -1625,7 +1636,7 @@ static void psr2_man_trk_ctl_calc(struct intel_crtc_state *crtc_state,
> > if (full_update) {
> > /*
> > - * Not applying Wa_14014971508:adlp as we do not support the
> > + * Not applying Wa_14014971508:adlp,mtl as we do not support the
> > * feature that requires this workaround.
> > */
> > val |= man_trk_ctl_single_full_frame_bit_get(dev_priv);
> > diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> > index a8a5bd426e78..ecb027626a21 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.h
> > +++ b/drivers/gpu/drm/i915/i915_drv.h
> > @@ -727,6 +727,10 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
> > (IS_SUBPLATFORM(__i915, INTEL_METEORLAKE, INTEL_SUBPLATFORM_##variant) && \
> > IS_GRAPHICS_STEP(__i915, since, until))
> > +#define IS_MTL_DISPLAY_STEP(__i915, since, until) \
> > + (DISPLAY_VER(__i915) == 14 && \
> > + IS_DISPLAY_STEP(__i915, since, until))
>
> You might want IS_METEORLAKE somewhere in here if macro is called IS_MTL_..
> otherwise it may surprise in the future. Unless it is guaranteed MTL will be
> the only with display_ver == 14.
ack
>
> Take care of checkpatch warnings as well please.
Checkpatch failures are all "macro argument reuse '__i915' - possible
side-effects?" this appears to be the standard for these macros (the
passing of __i915 to this macro to be fed into
IS_[DISPLAY|GRAPHICS]_step functions.). Was there something more I'm
missing, or were you wanting something more done to the overall format
of the file?
>
> Regards,
>
> Tvrtko
>
> > +
> > /*
> > * DG2 hardware steppings are a bit unusual. The hardware design was forked to
> > * create three variants (G10, G11, and G12) which each have distinct
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