drm/nouveau/kms/nv50-: add fp16 scanout support

Older hardware seems to want 0..1024 values, while new hardware takes
0..1 values. We set the gain to 1024 for the earlier display classes.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 20 insertions, 4 deletions

diff --git a/drivers/gpu/drm/nouveau/dispnv50/base507c.c b/drivers/gpu/drm/nouveau/dispnv50/base507c.c
index 80e020611bcb..00a85f1e1a4a 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/base507c.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/base507c.c
@@ -58,12 +58,21 @@ static void
 base507c_image_set(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw)
 {
 	u32 *push;
-	if ((push = evo_wait(&wndw->wndw, 10))) {
+	if ((push = evo_wait(&wndw->wndw, 13))) {
 		evo_mthd(push, 0x0084, 1);
 		evo_data(push, asyw->image.mode << 8 |
 			       asyw->image.interval << 4);
 		evo_mthd(push, 0x00c0, 1);
 		evo_data(push, asyw->image.handle[0]);
+		if (asyw->image.format == 0xca) {
+			evo_mthd(push, 0x0110, 2);
+			evo_data(push, 1);
+			evo_data(push, 0x6400);
+		} else {
+			evo_mthd(push, 0x0110, 2);
+			evo_data(push, 0);
+			evo_data(push, 0);
+		}
 		evo_mthd(push, 0x0800, 5);
 		evo_data(push, asyw->image.offset[0] >> 8);
 		evo_data(push, 0x00000000);
@@ -181,9 +190,6 @@ base507c_acquire(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw,
 	const struct drm_framebuffer *fb = asyw->state.fb;
 	int ret;
 
-	if (!fb->format->depth)
-		return -EINVAL;
-
 	ret = drm_atomic_helper_check_plane_state(&asyw->state, &asyh->state,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  DRM_PLANE_HELPER_NO_SCALING,
@@ -202,6 +208,14 @@ base507c_acquire(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw,
 	asyh->base.y = asyw->state.src.y1 >> 16;
 	asyh->base.w = asyw->state.fb->width;
 	asyh->base.h = asyw->state.fb->height;
+
+	/* Some newer formats, esp FP16 ones, don't have a
+	 * "depth". There's nothing that really makes sense there
+	 * either, so just set it to the implicit bit count.
+	 */
+	if (!asyh->base.depth)
+		asyh->base.depth = asyh->base.cpp * 8;
+
 	return 0;
 }
 
@@ -217,6 +231,8 @@ base507c_format[] = {
 	DRM_FORMAT_ABGR2101010,
 	DRM_FORMAT_XBGR8888,
 	DRM_FORMAT_ABGR8888,
+	DRM_FORMAT_XBGR16161616F,
+	DRM_FORMAT_ABGR16161616F,
 	0
 };