media: coda: jpeg: explicitly disable thumbnails in SEQ_INIT

Explicitly clear DEC_SEQ_JPG_THUMB_EN during sequence initialization.
Not clearing the register does not cause problems, since the only other
codec (MPEG-4 decode) that writes to this register happens to always
write 0 as well.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/coda/coda-bit.c

@@ -1679,6 +1679,8 @@ static int __coda_start_decoding(struct coda_ctx *ctx)
 			coda_write(dev, 512, CODA_CMD_DEC_SEQ_SPP_CHUNK_SIZE);
 		}
 	}
+	if (src_fourcc == V4L2_PIX_FMT_JPEG)
+		coda_write(dev, 0, CODA_CMD_DEC_SEQ_JPG_THUMB_EN);
 	if (dev->devtype->product != CODA_960)
 		coda_write(dev, 0, CODA_CMD_DEC_SEQ_SRC_SIZE);
 

drivers/media/platform/coda/coda_regs.h

@@ -157,6 +157,7 @@
 #define CODA_CMD_DEC_SEQ_START_BYTE		0x190
 #define CODA_CMD_DEC_SEQ_PS_BB_START		0x194
 #define CODA_CMD_DEC_SEQ_PS_BB_SIZE		0x198
+#define CODA_CMD_DEC_SEQ_JPG_THUMB_EN		0x19c
 #define CODA_CMD_DEC_SEQ_MP4_ASP_CLASS		0x19c
 #define		CODA_MP4_CLASS_MPEG4			0
 #define CODA_CMD_DEC_SEQ_X264_MV_EN		0x19c