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Code Issues Releases Wiki Activity

drm/i915: Enable Display WA 0528

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Possible hang with NV12 plane surface formats.
WA: When the plane source pixel format is NV12,
the CHICKEN_PIPESL_* register bit 22 must be set to 1
and the render decompression must not be enabled
on any of the planes in that pipe.

v2: removed unnecessary POSTING_READ

v3: Added RB from Maarten

v4: Removed support for NV12 for BROXTON

Credits-to: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Vidya Srinivas <vidya.srinivas@intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1526074397-10457-3-git-send-email-vidya.srinivas@intel.com
This commit is contained in:
Vidya Srinivas 2018-05-12 03:03:13 +05:30 committed by Maarten Lankhorst
parent 8e02115194
commit 6deef9b605
1 changed files with 19 additions and 3 deletions
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22
drivers/gpu/drm/i915/intel_display.c
View file

@ -488,10 +488,22 @@ static const struct intel_limit intel_limits_bxt = {
.p2 = { .p2_slow = 1, .p2_fast = 20 },
};
static void
skl_wa_528(struct drm_i915_private *dev_priv, int pipe, bool enable)
{
if (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))
return;
if (enable)
I915_WRITE(CHICKEN_PIPESL_1(pipe), HSW_FBCQ_DIS);
else
I915_WRITE(CHICKEN_PIPESL_1(pipe), 0);
}
static void
skl_wa_clkgate(struct drm_i915_private *dev_priv, int pipe, bool enable)
{
if (IS_SKYLAKE(dev_priv))
if (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))
return;
if (enable)
@ -5193,8 +5205,10 @@ static void intel_post_plane_update(struct intel_crtc_state *old_crtc_state)
/* Display WA 827 */
if (needs_nv12_wa(dev_priv, old_crtc_state) &&
!needs_nv12_wa(dev_priv, pipe_config))
!needs_nv12_wa(dev_priv, pipe_config)) {
skl_wa_clkgate(dev_priv, crtc->pipe, false);
skl_wa_528(dev_priv, crtc->pipe, false);
}
}
static void intel_pre_plane_update(struct intel_crtc_state *old_crtc_state,
@ -5231,8 +5245,10 @@ static void intel_pre_plane_update(struct intel_crtc_state *old_crtc_state,
/* Display WA 827 */
if (!needs_nv12_wa(dev_priv, old_crtc_state) &&
needs_nv12_wa(dev_priv, pipe_config))
needs_nv12_wa(dev_priv, pipe_config)) {
skl_wa_clkgate(dev_priv, crtc->pipe, true);
skl_wa_528(dev_priv, crtc->pipe, true);
}
/*
* Vblank time updates from the shadow to live plane control register