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drm/i915/psr: Take into account SU SDP scanline indication in vblank check

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SU SDP scanline indication should be taken into account when checking
vblank length. In Bspec we have:

PSR2_CTL[ SU SDP scanline indication ] = 0: (TRANS_VBLANK Vertical Blank
End- TRANS_VBLANK Vertical Blank Start) > PSR2_CTL Block Count Number value
in lines

PSR2_CTL[ SU SDP scanline indication ] = 1: (TRANS_VBLANK Vertical Blank
End- TRANS_VBLANK Vertical Blank Start- 1) > PSR2_CTL Block Count Number
value in lines

Bspec: 49274

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240607134917.1327574-12-jouni.hogander@intel.com
This commit is contained in:
Jouni Högander 2024-06-07 16:49:15 +03:00
parent 2e8938a1c5
commit aeafa46ee3
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/display/intel_psr.c
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@ -1250,6 +1250,9 @@ static bool wake_lines_fit_into_vblank(struct intel_dp *intel_dp,
crtc_state->hw.adjusted_mode.crtc_vblank_start;
int wake_lines = psr2_block_count_lines(intel_dp);
if (crtc_state->req_psr2_sdp_prior_scanline)
vblank -= 1;
/* Vblank >= PSR2_CTL Block Count Number maximum line count */
if (vblank < wake_lines)
return false;