drm/amd/display: add cursor pitch check

Replace the width check with a pitch check, which matches DM internals.
Add a new check to make sure the pitch (in pixels) matches the width.

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Simon Ser <contact@emersion.fr>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Harry Wentland <hwentlan@amd.com>
Cc: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 1c99833..9f12fab 100644 (file)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -8994,6 +8994,7 @@ static int dm_update_plane_state(struct dc *dc,
        struct amdgpu_crtc *new_acrtc;
        bool needs_reset;
        int ret = 0;
+       unsigned int pitch;
 
 
        new_plane_crtc = new_plane_state->crtc;
@@ -9027,15 +9028,25 @@ static int dm_update_plane_state(struct dc *dc,
                                return -EINVAL;
                        }
 
-                       switch (new_plane_state->fb->width) {
+                       /* Pitch in pixels */
+                       pitch = new_plane_state->fb->pitches[0] / new_plane_state->fb->format->cpp[0];
+
+                       if (new_plane_state->fb->width != pitch) {
+                               DRM_DEBUG_ATOMIC("Cursor FB width %d doesn't match pitch %d",
+                                                new_plane_state->fb->width,
+                                                pitch);
+                               return -EINVAL;
+                       }
+
+                       switch (pitch) {
                        case 64:
                        case 128:
                        case 256:
-                               /* FB width is supported by cursor plane */
+                               /* FB pitch is supported by cursor plane */
                                break;
                        default:
-                               DRM_DEBUG_ATOMIC("Bad cursor FB width %d\n",
-                                                new_plane_state->fb->width);
+                               DRM_DEBUG_ATOMIC("Bad cursor FB pitch %d px\n",
+                                                pitch);
                                return -EINVAL;
                        }
                }