radeon/video: use the hw to initial clear the buffers

Less CPU overhead and avoids contention over CPU accessible memory on startup.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>

src/gallium/drivers/radeon/radeon_uvd.c

@@ -830,8 +830,8 @@ struct pipe_video_codec *ruvd_create_decoder(struct pipe_context *context,
 			goto error;
 		}
 
-		rvid_clear_buffer(dec->ws, dec->cs, &dec->msg_fb_buffers[i]);
-		rvid_clear_buffer(dec->ws, dec->cs, &dec->bs_buffers[i]);
+		rvid_clear_buffer(context, &dec->msg_fb_buffers[i]);
+		rvid_clear_buffer(context, &dec->bs_buffers[i]);
 	}
 
 	if (!rvid_create_buffer(dec->screen, &dec->dpb, dpb_size, PIPE_USAGE_DEFAULT)) {
@@ -839,7 +839,7 @@ struct pipe_video_codec *ruvd_create_decoder(struct pipe_context *context,
 		goto error;
 	}
 
-	rvid_clear_buffer(dec->ws, dec->cs, &dec->dpb);
+	rvid_clear_buffer(context, &dec->dpb);
 
 	map_msg_fb_buf(dec);
 	dec->msg->size = sizeof(*dec->msg);

src/gallium/drivers/radeon/radeon_video.c

@@ -118,14 +118,12 @@ error:
 }
 
 /* clear the buffer with zeros */
-void rvid_clear_buffer(struct radeon_winsys *ws, struct radeon_winsys_cs *cs, struct rvid_buffer* buffer)
+void rvid_clear_buffer(struct pipe_context *context, struct rvid_buffer* buffer)
 {
-	void *ptr = ws->buffer_map(buffer->res->cs_buf, cs, PIPE_TRANSFER_WRITE);
-	if (!ptr)
-		return;
+	struct r600_common_context *rctx = (struct r600_common_context*)context;
 
-	memset(ptr, 0, buffer->res->buf->size);
-	ws->buffer_unmap(buffer->res->cs_buf);
+	rctx->clear_buffer(context, &buffer->res->b.b, 0, buffer->res->buf->size, 0);
+	context->flush(context, NULL, 0);
 }
 
 /**

src/gallium/drivers/radeon/radeon_video.h

@@ -62,7 +62,7 @@ bool rvid_resize_buffer(struct pipe_screen *screen, struct radeon_winsys_cs *cs,
 			struct rvid_buffer *new_buf, unsigned new_size);
 
 /* clear the buffer with zeros */
-void rvid_clear_buffer(struct radeon_winsys *ws, struct radeon_winsys_cs *cs, struct rvid_buffer* buffer);
+void rvid_clear_buffer(struct pipe_context *context, struct rvid_buffer* buffer);
 
 /* join surfaces into the same buffer with identical tiling params
    sumup their sizes and replace the backend buffers with a single bo */