nv50: H.264/MPEG2 decoding support via VP2, available on NV84-NV96, NVA0

Adds H.264 and MPEG2 codec support via VP2, using firmware from the
blob. Acceleration is supported at the bitstream level for H.264 and
IDCT level for MPEG2.

Known issues:
 - H.264 interlaced doesn't render properly
 - H.264 shows very occasional artifacts on a small fraction of videos
 - MPEG2 + VDPAU shows frequent but small artifacts, which aren't there
   when using XvMC on the same videos

Signed-off-by: Ilia Mirkin <[email protected]>

1 files changed, 12 insertions, 1 deletions

diff --git a/src/gallium/drivers/nv50/nv50_context.c b/src/gallium/drivers/nv50/nv50_context.c
index 5781c4bb766..79a047391af 100644
--- a/src/gallium/drivers/nv50/nv50_context.c
+++ b/src/gallium/drivers/nv50/nv50_context.c
@@ -258,7 +258,18 @@ nv50_create(struct pipe_screen *pscreen, void *priv)
    draw_set_rasterize_stage(nv50->draw, nv50_draw_render_stage(nv50));
 #endif
 
-   nouveau_context_init_vdec(&nv50->base);
+   if (screen->base.device->chipset < 0x84) {
+      /* PMPEG */
+      nouveau_context_init_vdec(&nv50->base);
+   } else if (screen->base.device->chipset < 0x98 ||
+              screen->base.device->chipset == 0xa0) {
+      /* VP2 */
+      pipe->create_video_decoder = nv84_create_decoder;
+      pipe->create_video_buffer = nv84_video_buffer_create;
+   } else {
+      /* Unsupported, but need to init pointers. */
+      nouveau_context_init_vdec(&nv50->base);
+   }
 
    flags = NOUVEAU_BO_VRAM | NOUVEAU_BO_RD;