[Intel-gfx] [Patch v2] drm/i915/mtl: Initial display workarounds
Matt Roper
matthew.d.roper at intel.com
Fri Dec 2 19:00:29 UTC 2022
On Fri, Dec 02, 2022 at 08:51:43AM -0800, Matt Atwood wrote:
> From: Jouni Högander <jouni.hogander at intel.com>
>
> This patch introduces initial workarounds for mtl platform
It looks like this patch is only dealing with workarounds from past
platforms that carry forward to [some] MTL steppings. I assume the new
MTL-only workarounds will roll in in the future?
As far as historic workarounds that need to be extended to MTL, it looks
like you're missing Wa_16015201720 (i.e., an update to
pipedmc_clock_gating_wa). Also, since you still have comments listing
platforms, Wa_22014263786 also applies to MTL (the code is already
correct, but the comment is now stale since it doesn't list MTL).
>
> v2: switch IS_MTL_DISPLAY_STEP to use IS_METEORLAKE from testing display
> ver. (Tvrtko)
>
> 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.
s/has/have/ while changing this line.
Matt
> * 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..0ad206f76b7b 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) \
> + (IS_METEORLAKE(__i915) && \
> + IS_DISPLAY_STEP(__i915, since, until))
> +
> /*
> * DG2 hardware steppings are a bit unusual. The hardware design was forked to
> * create three variants (G10, G11, and G12) which each have distinct
> --
> 2.38.1
>
--
Matt Roper
Graphics Software Engineer
VTT-OSGC Platform Enablement
Intel Corporation
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