From: Ville Syrjälä <ville.syrj...@linux.intel.com>
Make sure we're not exceeding the max scaling factors for the panel
fitter.
v2: Rebase due to crtc enable check
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
drivers/gpu/drm/i915/display/intel_display.c | 46 +++++++++++++++++++-
1 file changed, 45 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c
b/drivers/gpu/drm/i915/display/intel_display.c
index ccec2b54677d..f7f93af55ec5 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -11810,13 +11810,57 @@ static int intel_pch_pfit_check_src_size(const struct
intel_crtc_state *crtc_sta
return 0;
}
+static int intel_pch_pfit_check_scaling(const struct intel_crtc_state
*crtc_state)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+ struct drm_rect src = {
+ .x2 = crtc_state->pipe_src_w << 16,
+ .y2 = crtc_state->pipe_src_h << 16,
+ };
+ const struct drm_rect *dst = &crtc_state->pch_pfit.dst;
+ int ret, max_scale;
+
+ if (INTEL_GEN(dev_priv) >= 9) {
+ if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
+ max_scale = 0x18000 - 1; /* < 1.5 */
+ else
+ max_scale = 0x30000 - 1; /* < 3.0 */
+ } else {
+ max_scale = 0x12000; /* 1.125 */
+ }
+
+ ret = drm_rect_calc_hscale(&src, dst, 0, max_scale);
+ if (ret < 0) {
+ DRM_DEBUG_KMS("pfit horizontal downscale (%d->%d) exceeds max
(0x%x)\n",
+ crtc_state->pipe_src_w,
+ drm_rect_width(dst), max_scale);
+ return ret;
+ }
+
+ ret = drm_rect_calc_vscale(&src, dst, 0, max_scale);
+ if (ret < 0) {
+ DRM_DEBUG_KMS("pfit vertical downscale (%d->%d) exceeds max
(0x%x)\n",
+ crtc_state->pipe_src_h,
+ drm_rect_height(dst), max_scale);
+ return ret;
+ }
+
+ return 0;
+}
+
static int intel_pch_pfit_check(const struct intel_crtc_state *crtc_state)
{
+ int ret;
+
if (!crtc_state->base.enable ||
!crtc_state->pch_pfit.enabled)
return 0;
- return intel_pch_pfit_check_src_size(crtc_state);
+ ret = intel_pch_pfit_check_src_size(crtc_state);
+ if (ret)
+ return ret;
+
+ return intel_pch_pfit_check_scaling(crtc_state);
}
static int intel_crtc_atomic_check(struct drm_crtc *crtc,
--
2.21.0
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
