Found this while trying to make some changes to the kms_cursor_crc test. curs507a_acquire checks that the width and height of the cursor framebuffer are equal (asyw->image.{w,h}). This isn't entirely correct though, as the height of the cursor can be larger than the size of the cursor, as long as the width is the same as the cursor size and there's no framebuffer offset.
Note that I'm not entirely sure why this wasn't previously breaking kms_cursor_crc tests - they all set up cursors with the height being one pixel larger than the actual size of the cursor. But this seems to fix things, and the code before was definitely incorrect - so it's not really worth looking into further imho.
Changes since v1: * Don't use crtc_w everywhere for determining cursor layout, just use fb size again * Change check so that we only check that the w/h of the cursor plane is the same, the width of the scanout surface is the same as the framebuffer width, and that there's no offset being used for the cursor surface.
Signed-off-by: Lyude Paul lyude@redhat.com Cc: Martin Peres martin.peres@mupuf.org Cc: Jeremy Cline jcline@redhat.com --- drivers/gpu/drm/nouveau/dispnv50/curs507a.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/nouveau/dispnv50/curs507a.c b/drivers/gpu/drm/nouveau/dispnv50/curs507a.c index 54fbd6fe751d..00e19fd959ea 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/curs507a.c +++ b/drivers/gpu/drm/nouveau/dispnv50/curs507a.c @@ -98,6 +98,7 @@ static int curs507a_acquire(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw, struct nv50_head_atom *asyh) { + struct nouveau_drm *drm = nouveau_drm(wndw->plane.dev); struct nv50_head *head = nv50_head(asyw->state.crtc); int ret;
@@ -109,8 +110,20 @@ curs507a_acquire(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw, if (ret || !asyh->curs.visible) return ret;
- if (asyw->image.w != asyw->image.h) + if (asyw->state.crtc_w != asyw->state.crtc_h) { + NV_ATOMIC(drm, "Plane width/height must be equal for cursors\n"); return -EINVAL; + } + + if (asyw->image.w != asyw->state.crtc_w) { + NV_ATOMIC(drm, "Plane width must be equal to fb width for cursors (height can be larger though)\n"); + return -EINVAL; + } + + if (asyw->state.src_x || asyw->state.src_y) { + NV_ATOMIC(drm, "Cursor planes do not support framebuffer offsets\n"); + return -EINVAL; + }
ret = head->func->curs_layout(head, asyw, asyh); if (ret)