On Fri, Mar 22, 2019 at 02:59:52PM +0100, Maarten Lankhorst wrote:
> Y41x formats is a 4:4:4 format, so it can be addressed with pixel level accuracy.
> Meanwhile it seems that while rotating YUYV 4:2:2 formats need a multiple of 2
> for width and height, otherwise corruption occurs.
>
> For YUV 4:2:2, the spec says that w/h should always be even, but we get
> away with odd height while unrotated. When rotating it seems corruption
> occurs with an odd x/y, and w/h should always be even.
> Just to be completely paranoid, reject odd x/y w/h when rotating 90/270.
>
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_sprite.c | 29 +++++++++++++++++++----------
> 1 file changed, 19 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
> index 3f2055f70d05..aca987356194 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -269,7 +269,8 @@ int intel_plane_check_src_coordinates(struct intel_plane_state *plane_state)
> {
> const struct drm_framebuffer *fb = plane_state->base.fb;
> struct drm_rect *src = &plane_state->base.src;
> - u32 src_x, src_y, src_w, src_h;
> + u32 src_x, src_y, src_w, src_h, hsub, vsub;
> + bool rotated = drm_rotation_90_or_270(plane_state->base.rotation);
>
> /*
> * Hardware doesn't handle subpixel coordinates.
> @@ -287,18 +288,26 @@ int intel_plane_check_src_coordinates(struct intel_plane_state *plane_state)
> src->y1 = src_y << 16;
> src->y2 = (src_y + src_h) << 16;
>
> - if (fb->format->is_yuv &&
> - (src_x & 1 || src_w & 1)) {
> - DRM_DEBUG_KMS("src x/w (%u, %u) must be a multiple of 2 for YUV planes\n",
> - src_x, src_w);
> + if (!fb->format->is_yuv)
> + return 0;
> +
> + /* YUV specific checks */
> + if (!rotated) {
> + hsub = fb->format->hsub;
> + vsub = fb->format->vsub;
> + } else {
This could maybe use a comment of some sort. But can't think of one
right now so meh.
Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> + hsub = vsub = max(fb->format->hsub, fb->format->vsub);
> + }
> +
> + if (src_x % hsub || src_w % hsub) {
> + DRM_DEBUG_KMS("src x/w (%u, %u) must be a multiple of %u for %sYUV planes\n",
> + src_x, src_w, hsub, rotated ? "rotated " : "");
> return -EINVAL;
> }
>
> - if (fb->format->is_yuv &&
> - fb->format->num_planes > 1 &&
> - (src_y & 1 || src_h & 1)) {
> - DRM_DEBUG_KMS("src y/h (%u, %u) must be a multiple of 2 for planar YUV planes\n",
> - src_y, src_h);
> + if (src_y % vsub || src_h % vsub) {
> + DRM_DEBUG_KMS("src y/h (%u, %u) must be a multiple of %u for %sYUV planes\n",
> + src_y, src_h, vsub, rotated ? "rotated " : "");
> return -EINVAL;
> }
>
> --
> 2.20.1
>
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--
Ville Syrjälä
Intel
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