From: Ben Skeggs bskeggs@redhat.com
[ Upstream commit 1e339ab2ac3c769c1b06b9fb7d532f8495ebc56d ]
On Turing, an input LUT is required to transform inputs in fixed-point formats to FP16 for the internal display pipe. We provide an identity mapping whenever a window is enabled for this reason.
HW has error checks to ensure when the input is already FP16, that the input LUT is also disabled.
Signed-off-by: Ben Skeggs bskeggs@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/nouveau/dispnv50/wndw.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/nouveau/dispnv50/wndw.c b/drivers/gpu/drm/nouveau/dispnv50/wndw.c index 283ff690350ea..50303ec194bbc 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/wndw.c +++ b/drivers/gpu/drm/nouveau/dispnv50/wndw.c @@ -320,7 +320,9 @@ nv50_wndw_atomic_check_lut(struct nv50_wndw *wndw, asyh->wndw.olut &= ~BIT(wndw->id); }
- if (!ilut && wndw->func->ilut_identity) { + if (!ilut && wndw->func->ilut_identity && + asyw->state.fb->format->format != DRM_FORMAT_XBGR16161616F && + asyw->state.fb->format->format != DRM_FORMAT_ABGR16161616F) { static struct drm_property_blob dummy = {}; ilut = &dummy; }