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drm/i915/psr: Equation changed for sending start/stop on prior line

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Equation for sending start/end SDP prior to the SU region start/end
has changed. Update used formula.

Bspec: 49274

Cc: Mika Kahola <mika.kahola@intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220905102355.176622-2-jouni.hogander@intel.com
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
This commit is contained in:
Jouni Högander 2022-09-05 13:23:54 +03:00 committed by Ville Syrjälä
parent 1bba5543e4
commit eccfba1785
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/i915/display/intel_psr.c
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@ -805,8 +805,8 @@ static bool _compute_psr2_sdp_prior_scanline_indication(struct intel_dp *intel_d
hblank_total = adjusted_mode->crtc_hblank_end - adjusted_mode->crtc_hblank_start;
hblank_ns = div_u64(1000000ULL * hblank_total, adjusted_mode->crtc_clock);
/* From spec: (72 / number of lanes) * 1000 / symbol clock frequency MHz */
req_ns = (72 / crtc_state->lane_count) * 1000 / (crtc_state->port_clock / 1000);
/* From spec: ((60 / number of lanes) + 11) * 1000 / symbol clock frequency MHz */
req_ns = ((60 / crtc_state->lane_count) + 11) * 1000 / (crtc_state->port_clock / 1000);
if ((hblank_ns - req_ns) > 100)
return true;