[PATCH 4/8] drm: mali-dp: Add pitch alignment check for planes

[Brian Starkey]

Check that the framebuffer pitches are appropriately aligned when
checking planes.

Signed-off-by: Brian Starkey <brian.star...@arm.com>
---
 drivers/gpu/drm/arm/malidp_planes.c |   15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/arm/malidp_planes.c 
b/drivers/gpu/drm/arm/malidp_planes.c
index 82c193e..f95e02d 100644
--- a/drivers/gpu/drm/arm/malidp_planes.c
+++ b/drivers/gpu/drm/arm/malidp_planes.c
@@ -86,17 +86,30 @@ static int malidp_de_plane_check(struct drm_plane *plane,
 {
        struct malidp_plane *mp = to_malidp_plane(plane);
        struct malidp_plane_state *ms = to_malidp_plane_state(state);
+       struct drm_framebuffer *fb;
+       int n_planes, i;
        u8 format_id;
        u32 src_w, src_h;
 
        if (!state->crtc || !state->fb)
                return 0;
 
+       fb = state->fb;
+
        format_id = malidp_hw_get_format_id(&mp->hwdev->map, mp->layer->id,
-                                           state->fb->pixel_format);
+                                           fb->pixel_format);
        if (format_id == MALIDP_INVALID_FORMAT_ID)
                return -EINVAL;
 
+       n_planes = drm_format_num_planes(fb->pixel_format);
+       for (i = 0; i < n_planes; i++) {
+               if (!malidp_hw_pitch_valid(mp->hwdev, fb->pitches[i])) {
+                       DRM_DEBUG_KMS("Invalid pitch %u for plane %d\n",
+                                     fb->pitches[i], i);
+                       return -EINVAL;
+               }
+       }
+
        src_w = state->src_w >> 16;
        src_h = state->src_h >> 16;
 
-- 
1.7.9.5