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

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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>
This commit is contained in:
Ben Skeggs 2019-05-29 15:44:57 +10:00
parent 0446f48cb5
commit 1e339ab2ac
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/nouveau/dispnv50/wndw.c
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@ -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;
}