From: Ville Syrjälä <ville.syrj...@linux.intel.com>
Reduce the size of the the src/dst viewport to keep the scalign ratios
in check.
Also treat sprites below the minimum size as invisble.
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
drivers/gpu/drm/i915/intel_sprite.c | 60 ++++++++++++++++++++-----------------
1 file changed, 32 insertions(+), 28 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_sprite.c
b/drivers/gpu/drm/i915/intel_sprite.c
index 93a6657..c3a5688 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -679,26 +679,19 @@ intel_update_plane(struct drm_plane *plane, struct
drm_crtc *crtc,
return -EINVAL;
}
+ /*
+ * FIXME the following code does a bunch of fuzzy adjustments to the
+ * coordinates and sizes. We probably need some way to decide whether
+ * more strict checking should be done instead.
+ */
max_scale = intel_plane->max_downscale << 16;
min_scale = intel_plane->can_scale ? 1 : (1 << 16);
- hscale = drm_rect_calc_hscale(&src, &dst, min_scale, max_scale);
- if (hscale < 0) {
- DRM_DEBUG_KMS("Horizontal scaling factor out of limits\n");
- drm_rect_debug_print(&src, true);
- drm_rect_debug_print(&dst, false);
+ hscale = drm_rect_calc_hscale_relaxed(&src, &dst, min_scale, max_scale);
+ BUG_ON(hscale < 0);
- return hscale;
- }
-
- vscale = drm_rect_calc_vscale(&src, &dst, min_scale, max_scale);
- if (vscale < 0) {
- DRM_DEBUG_KMS("Vertical scaling factor out of limits\n");
- drm_rect_debug_print(&src, true);
- drm_rect_debug_print(&dst, false);
-
- return vscale;
- }
+ vscale = drm_rect_calc_vscale_relaxed(&src, &dst, min_scale, max_scale);
+ BUG_ON(vscale < 0);
visible = drm_rect_clip_scaled(&src, &dst, &clip, hscale, vscale);
@@ -708,6 +701,25 @@ intel_update_plane(struct drm_plane *plane, struct
drm_crtc *crtc,
crtc_h = drm_rect_height(&dst);
if (visible) {
+ /* check again in case clipping clamped the results */
+ hscale = drm_rect_calc_hscale(&src, &dst, min_scale, max_scale);
+ if (hscale < 0) {
+ DRM_DEBUG_KMS("Horizontal scaling factor out of
limits\n");
+ drm_rect_debug_print(&src, true);
+ drm_rect_debug_print(&dst, false);
+
+ return hscale;
+ }
+
+ vscale = drm_rect_calc_vscale(&src, &dst, min_scale, max_scale);
+ if (vscale < 0) {
+ DRM_DEBUG_KMS("Vertical scaling factor out of
limits\n");
+ drm_rect_debug_print(&src, true);
+ drm_rect_debug_print(&dst, false);
+
+ return vscale;
+ }
+
/* Make the source viewport size an exact multiple of the
scaling factors. */
drm_rect_adjust_size(&src,
drm_rect_width(&dst) * hscale -
drm_rect_width(&src),
@@ -718,10 +730,6 @@ intel_update_plane(struct drm_plane *plane, struct
drm_crtc *crtc,
* Adjust to (macro)pixel boundary, but be careful not to
* increase the source viewport size, because that could
* push the downscaling factor out of bounds.
- *
- * FIXME Should we be really strict and reject the
- * config if it results in non (macro)pixel aligned
- * coords?
*/
src_x = src.x1 >> 16;
src_w = drm_rect_width(&src) >> 16;
@@ -752,15 +760,11 @@ intel_update_plane(struct drm_plane *plane, struct
drm_crtc *crtc,
/* FIXME interlacing min height is 6 */
- if (crtc_w < 3 || crtc_h < 3) {
- DRM_DEBUG_KMS("Destination dimensions too small\n");
- return -EINVAL;
- }
+ if (crtc_w < 3 || crtc_h < 3)
+ visible = false;
- if (src_w < 3 || src_h < 3) {
- DRM_DEBUG_KMS("Source dimensions too small\n");
- return -EINVAL;
- }
+ if (src_w < 3 || src_h < 3)
+ visible = false;
width_bytes = ((src_x * pixel_size) & 63) + src_w * pixel_size;
--
1.8.1.5
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