media: allegro: add support for HEVC encoding

The Allegro Codec supports HEVC encoding. The messages to the MCU are
the same for H.264 and HEVC, but some options have to be changed. These
are actually only a few options.

The driver, however, must add the HEVC VPS/SPS/PPS NAL Units to the
coded stream and must properly provide the HEVC format and controls to
user space.

[hverkuil: fix warning for wrong enum type (h264 instead of hevc)]
Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/allegro-dvt/allegro-mail.c

@@ -67,12 +67,16 @@ static inline u32 settings_get_mcu_codec(struct create_channel_param *param)
 
 	if (version < MCU_MSG_VERSION_2019_2) {
 		switch (pixelformat) {
+		case V4L2_PIX_FMT_HEVC:
+			return 2;
 		case V4L2_PIX_FMT_H264:
 		default:
 			return 1;
 		}
 	} else {
 		switch (pixelformat) {
+		case V4L2_PIX_FMT_HEVC:
+			return 1;
 		case V4L2_PIX_FMT_H264:
 		default:
 			return 0;
@@ -117,7 +121,9 @@ allegro_encode_config_blob(u32 *dst, struct create_channel_param *param)
 	dst[i++] = val;
 
 	val = 0;
+	val |= param->enable_reordering ? BIT(0) : 0;
 	val |= param->dbf_ovr_en ? BIT(2) : 0;
+	val |= param->override_lf ? BIT(12) : 0;
 	dst[i++] = val;
 
 	if (version >= MCU_MSG_VERSION_2019_2) {

drivers/media/platform/allegro-dvt/allegro-mail.h

@@ -65,6 +65,7 @@ struct create_channel_param {
 	u32 temporal_mvp_enable;
 	u32 enable_reordering;
 	u32 dbf_ovr_en;
+	u32 override_lf;
 	u32 num_ref_idx_l0;
 	u32 num_ref_idx_l1;
 	u32 custom_lda;