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drm/i915/dsb: Always set DSB_SKIP_WAITS_EN

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Bspec asks us to always set the DSB_SKIP_WAITS_EN bit in
DSB_CHICKEN. This seems to instruct DSB to skip vblank and
scanline waits when PSR is entered.

I don't think we have any cases currently where we would want
to enter PSR while DSB is waiting for something, but let's
set the bit anyway to align with Bspec's wishes.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240306040806.21697-4-ville.syrjala@linux.intel.com
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
This commit is contained in:
Ville Syrjälä 2024-03-06 06:08:06 +02:00
parent 41429d9b68
commit 6764ee4718
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/i915/display/intel_dsb.c
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@ -343,12 +343,13 @@ static int intel_dsb_dewake_scanline(const struct intel_crtc_state *crtc_state)
static u32 dsb_chicken(struct intel_crtc *crtc)
{
if (crtc->mode_flags & I915_MODE_FLAG_VRR)
return DSB_CTRL_WAIT_SAFE_WINDOW |
return DSB_SKIP_WAITS_EN |
DSB_CTRL_WAIT_SAFE_WINDOW |
DSB_CTRL_NO_WAIT_VBLANK |
DSB_INST_WAIT_SAFE_WINDOW |
DSB_INST_NO_WAIT_VBLANK;
else
return 0;
return DSB_SKIP_WAITS_EN;
}
static void _intel_dsb_commit(struct intel_dsb *dsb, u32 ctrl,