media: allegro: support handling firmware dependent values

Like the message format, also the identifiers in the messages differ
between firmware versions. This especially affects the identifier for
the codec that shall be used. As the messages used by the driver are now
independent from the firmware, we can use the values defined by V4L2 as
identifiers in the messages.

Convert the V4L2 codec format to the respective firmware value when
encoding the messages to binary format instead beforehand.
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/staging/media/allegro-dvt/allegro-core.c

@@ -812,15 +812,6 @@ static u32 v4l2_colorspace_to_mcu_colorspace(enum v4l2_colorspace colorspace)
 	}
 }
 
-static s8 v4l2_pixelformat_to_mcu_codec(u32 pixelformat)
-{
-	switch (pixelformat) {
-	case V4L2_PIX_FMT_H264:
-	default:
-		return 1;
-	}
-}
-
 static u8 v4l2_profile_to_mcu_profile(enum v4l2_mpeg_video_h264_profile profile)
 {
 	switch (profile) {
@@ -919,7 +910,7 @@ static int fill_create_channel_param(struct allegro_channel *channel,
 	param->src_mode = 0x0;
 	param->profile = v4l2_profile_to_mcu_profile(channel->profile);
 	param->constraint_set_flags = BIT(1);
-	param->codec = v4l2_pixelformat_to_mcu_codec(channel->codec);
+	param->codec = channel->codec;
 	param->level = v4l2_level_to_mcu_level(channel->level);
 	param->tier = 0;
 	param->sps_param = BIT(20) | 0x4a;

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

@@ -9,6 +9,7 @@
 #include <linux/bitfield.h>
 #include <linux/export.h>
 #include <linux/errno.h>
+#include <linux/videodev2.h>
 
 #include "allegro-mail.h"
 
@@ -53,17 +54,29 @@ allegro_enc_init(u32 *dst, struct mcu_msg_init_request *msg)
 	return i * sizeof(*dst);
 }
 
+static inline u32 settings_get_mcu_codec(struct create_channel_param *param)
+{
+	u32 pixelformat = param->codec;
+
+	switch (pixelformat) {
+	case V4L2_PIX_FMT_H264:
+	default:
+		return 1;
+	}
+}
+
 static ssize_t
 allegro_encode_channel_config(u32 *dst, struct create_channel_param *param)
 {
 	unsigned int i = 0;
+	unsigned int codec = settings_get_mcu_codec(param);
 
 	dst[i++] = FIELD_PREP(GENMASK(31, 16), param->height) |
 		   FIELD_PREP(GENMASK(15, 0), param->width);
 	dst[i++] = param->format;
 	dst[i++] = param->colorspace;
 	dst[i++] = param->src_mode;
-	dst[i++] = FIELD_PREP(GENMASK(31, 24), param->codec) |
+	dst[i++] = FIELD_PREP(GENMASK(31, 24), codec) |
 		   FIELD_PREP(GENMASK(23, 8), param->constraint_set_flags) |
 		   FIELD_PREP(GENMASK(7, 0), param->profile);
 	dst[i++] = FIELD_PREP(GENMASK(31, 16), param->tier) |

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

@@ -48,7 +48,7 @@ struct create_channel_param {
 	u32 src_mode;
 	u8 profile;
 	u16 constraint_set_flags;
-	s8 codec;
+	u32 codec;
 	u16 level;
 	u16 tier;
 	u32 sps_param;