Re: [PATCH 1/3] drivers/nouveau/kms/nv50-: Reject format modifiers for cursor planes

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Gah, yes, good catch.

Reviewed-by: James Jones <jajones@xxxxxxxxxx>

On 1/18/21 5:54 PM, Lyude Paul wrote:
Nvidia hardware doesn't actually support using tiling formats with the
cursor plane, only linear is allowed. In the future, we should write a
testcase for this.

Fixes: c586f30bf74c ("drm/nouveau/kms: Add format mod prop to base/ovly/nvdisp")
Cc: James Jones <jajones@xxxxxxxxxx>
Cc: Martin Peres <martin.peres@xxxxxxx>
Cc: Jeremy Cline <jcline@xxxxxxxxxx>
Cc: Simon Ser <contact@xxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v5.8+
Signed-off-by: Lyude Paul <lyude@xxxxxxxxxx>
---
  drivers/gpu/drm/nouveau/dispnv50/wndw.c | 17 +++++++++++++----
  1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv50/wndw.c b/drivers/gpu/drm/nouveau/dispnv50/wndw.c
index ce451242f79e..271de3a63f21 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/wndw.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/wndw.c
@@ -702,6 +702,11 @@ nv50_wndw_init(struct nv50_wndw *wndw)
  	nvif_notify_get(&wndw->notify);
  }
+static const u64 nv50_cursor_format_modifiers[] = {
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID,
+};
+
  int
  nv50_wndw_new_(const struct nv50_wndw_func *func, struct drm_device *dev,
  	       enum drm_plane_type type, const char *name, int index,
@@ -713,6 +718,7 @@ nv50_wndw_new_(const struct nv50_wndw_func *func, struct drm_device *dev,
  	struct nvif_mmu *mmu = &drm->client.mmu;
  	struct nv50_disp *disp = nv50_disp(dev);
  	struct nv50_wndw *wndw;
+	const u64 *format_modifiers;
  	int nformat;
  	int ret;
@@ -728,10 +734,13 @@ nv50_wndw_new_(const struct nv50_wndw_func *func, struct drm_device *dev, for (nformat = 0; format[nformat]; nformat++); - ret = drm_universal_plane_init(dev, &wndw->plane, heads, &nv50_wndw,
-				       format, nformat,
-				       nouveau_display(dev)->format_modifiers,
-				       type, "%s-%d", name, index);
+	if (type == DRM_PLANE_TYPE_CURSOR)
+		format_modifiers = nv50_cursor_format_modifiers;
+	else
+		format_modifiers = nouveau_display(dev)->format_modifiers;
+
+	ret = drm_universal_plane_init(dev, &wndw->plane, heads, &nv50_wndw, format, nformat,
+				       format_modifiers, type, "%s-%d", name, index);
  	if (ret) {
  		kfree(*pwndw);
  		*pwndw = NULL;




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