Check if dsc prefill latency is sufficient for vblank.
Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/skl_watermark.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c
index a538e2b82c12..0f1ee755fd8a 100644
--- a/drivers/gpu/drm/i915/display/skl_watermark.c
+++ b/drivers/gpu/drm/i915/display/skl_watermark.c
@@ -2292,6 +2292,25 @@ static int icl_build_plane_wm(struct intel_crtc_state *crtc_state,
return 0;
}
+static int
+skl_dsc_prefill_time(const struct intel_crtc_state *crtc_state)
+{
+ const struct intel_crtc_scaler_state *scaler_state =
+ &crtc_state->scaler_state;
+ int hscale = scaler_state->scalers[0].hscale;
+ int vscale = scaler_state->scalers[0].vscale;
+
+ if (!crtc_state->dsc.compression_enable)
+ return 0;
+ /*
+ * FIXME: CDCLK Prefill adjustment to add
+ */
+ if (scaler_state->scaler_users)
+ return DIV_ROUND_UP(15 * crtc_state->linetime * hscale * vscale, 10);
+
+ return 0;
+}
+
static int
scaler_prefill_time(const struct intel_crtc_state *crtc_state)
{
@@ -2324,6 +2343,7 @@ skl_is_vblank_too_short(const struct intel_crtc_state *crtc_state,
return crtc_state->framestart_delay +
intel_usecs_to_scanlines(adjusted_mode, latency) +
scaler_prefill_time(crtc_state) +
+ skl_dsc_prefill_time(crtc_state) +
wm0_lines >
adjusted_mode->crtc_vtotal - adjusted_mode->crtc_vblank_start;
}
--
2.46.0
