diff options
| -rw-r--r-- | drivers/gpu/drm/i915/display/skl_scaler.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/skl_scaler.c b/drivers/gpu/drm/i915/display/skl_scaler.c index 54f9adba4ac0..c8bf6fd92ce8 100644 --- a/drivers/gpu/drm/i915/display/skl_scaler.c +++ b/drivers/gpu/drm/i915/display/skl_scaler.c @@ -459,6 +459,16 @@ static int intel_atomic_setup_scaler(struct intel_crtc_state *crtc_state, calculate_max_scale(crtc, 0, *scaler_id, &max_hscale, &max_vscale); + /* + * When configured for Pipe YUV 420 encoding for port output, + * limit downscaling to less than 1.5 (source/destination) in + * the horizontal direction and 1.0 in the vertical direction. + */ + if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420) { + max_hscale = 0x18000 - 1; + max_vscale = 0x10000; + } + hscale = drm_rect_calc_hscale(&src, &crtc_state->pch_pfit.dst, 0, max_hscale); vscale = drm_rect_calc_vscale(&src, &crtc_state->pch_pfit.dst, |