Commit 1e339ab2 authored May 29, 2019 by Ben Skeggs

drm/nouveau/kms/tu102-: disable input lut when input is already FP16



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>

parent 0446f48c

drivers/gpu/drm/nouveau/dispnv50/wndw.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -322,7 +322,9 @@ 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;
		}