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drm/nouveau/kms/nv50-: Fix disabling dithering 

While we expose the ability to turn off hardware dithering for nouveau,
we actually make the mistake of turning it on anyway, due to
dithering_depth containing a non-zero value if our dithering depth isn't
also set to 6 bpc.

So, fix it by never enabling dithering when it's disabled.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Ben Skeggs <bskeggs@redhat.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200627194657.156514-6-lyude@redhat.com
This commit is contained in:
Lyude Paul 2020-03-17 14:54:06 -04:00
parent 9c8e9b790d
commit fb2420b701
1 changed files with 13 additions and 11 deletions
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24
drivers/gpu/drm/nouveau/dispnv50/head.c
View File

@ -84,18 +84,20 @@ nv50_head_atomic_check_dither(struct nv50_head_atom *armh,
{
u32 mode = 0x00;
if (asyc->dither.mode == DITHERING_MODE_AUTO) {
if (asyh->base.depth > asyh->or.bpc * 3)
mode = DITHERING_MODE_DYNAMIC2X2;
} else {
mode = asyc->dither.mode;
}
if (asyc->dither.mode) {
if (asyc->dither.mode == DITHERING_MODE_AUTO) {
if (asyh->base.depth > asyh->or.bpc * 3)
mode = DITHERING_MODE_DYNAMIC2X2;
} else {
mode = asyc->dither.mode;
}
if (asyc->dither.depth == DITHERING_DEPTH_AUTO) {
if (asyh->or.bpc >= 8)
mode |= DITHERING_DEPTH_8BPC;
} else {
mode |= asyc->dither.depth;
if (asyc->dither.depth == DITHERING_DEPTH_AUTO) {
if (asyh->or.bpc >= 8)
mode |= DITHERING_DEPTH_8BPC;
} else {
mode |= asyc->dither.depth;
}
}
asyh->dither.enable = mode;