media: meson: vdec: enable mcrcc for VP9

The motion compensation reference cache controller allows caching
parts of reference frames for faster decoding.

Fixes: 00c43088 ("media: meson: vdec: add VP9 decoder support")
Signed-off-by: Maxime Jourdan <mjourdan@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/meson/vdec/codec_vp9.c

@@ -854,6 +854,36 @@ static int codec_vp9_stop(struct amvdec_session *sess)
 	return 0;
 }
 
+/*
+ * Program LAST & GOLDEN frames into the motion compensation reference cache
+ * controller
+ */
+static void codec_vp9_set_mcrcc(struct amvdec_session *sess)
+{
+	struct amvdec_core *core = sess->core;
+	struct codec_vp9 *vp9 = sess->priv;
+	u32 val;
+
+	/* Reset mcrcc */
+	amvdec_write_dos(core, HEVCD_MCRCC_CTL1, 0x2);
+	/* Disable on I-frame */
+	if (vp9->cur_frame->type == KEY_FRAME || vp9->cur_frame->intra_only) {
+		amvdec_write_dos(core, HEVCD_MCRCC_CTL1, 0x0);
+		return;
+	}
+
+	amvdec_write_dos(core, HEVCD_MPP_ANC_CANVAS_ACCCONFIG_ADDR, BIT(1));
+	val = amvdec_read_dos(core, HEVCD_MPP_ANC_CANVAS_DATA_ADDR) & 0xffff;
+	val |= (val << 16);
+	amvdec_write_dos(core, HEVCD_MCRCC_CTL2, val);
+	val = amvdec_read_dos(core, HEVCD_MPP_ANC_CANVAS_DATA_ADDR) & 0xffff;
+	val |= (val << 16);
+	amvdec_write_dos(core, HEVCD_MCRCC_CTL3, val);
+
+	/* Enable mcrcc progressive-mode */
+	amvdec_write_dos(core, HEVCD_MCRCC_CTL1, 0xff0);
+}
+
 static void codec_vp9_set_sao(struct amvdec_session *sess,
 			      struct vb2_buffer *vb)
 {
@@ -1267,6 +1297,7 @@ static void codec_vp9_process_frame(struct amvdec_session *sess)
 
 	amvdec_write_dos(core, HEVC_PARSER_PICTURE_SIZE,
 			 (vp9->height << 16) | vp9->width);
+	codec_vp9_set_mcrcc(sess);
 	codec_vp9_set_sao(sess, &vp9->cur_frame->vbuf->vb2_buf);
 
 	vp9_loop_filter_frame_init(core, &vp9->seg_4lf,