Before starting a PIC_RUN, pad the bitstream with 0xff until 256 bytes
past the next multiple of 256 bytes, if the buffer to be decoded is the
last buffer in the bitstream.
Signed-off-by: Philipp Zabel <p.za...@pengutronix.de>
---
drivers/media/platform/coda/coda-bit.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/media/platform/coda/coda-bit.c
b/drivers/media/platform/coda/coda-bit.c
index d1ecda5..27e0764 100644
--- a/drivers/media/platform/coda/coda-bit.c
+++ b/drivers/media/platform/coda/coda-bit.c
@@ -1625,6 +1625,26 @@ static int coda_prepare_decode(struct coda_ctx *ctx)
coda_write(dev, ctx->iram_info.axi_sram_use,
CODA7_REG_BIT_AXI_SRAM_USE);
+ if (ctx->codec->src_fourcc == V4L2_PIX_FMT_JPEG) {
+ struct coda_buffer_meta *meta;
+
+ /* If this is the last buffer in the bitstream, add padding */
+ meta = list_first_entry(&ctx->buffer_meta_list,
+ struct coda_buffer_meta, list);
+ if (meta->end == (ctx->bitstream_fifo.kfifo.in &
+ ctx->bitstream_fifo.kfifo.mask)) {
+ static unsigned char buf[512];
+ unsigned int pad;
+
+ /* Pad to multiple of 256 and then add 256 more */
+ pad = ((0 - meta->end) & 0xff) + 256;
+
+ memset(buf, 0xff, sizeof(buf));
+
+ kfifo_in(&ctx->bitstream_fifo, buf, pad);
+ }
+ }
+
coda_kfifo_sync_to_device_full(ctx);
coda_command_async(ctx, CODA_COMMAND_PIC_RUN);
--
2.1.0
--
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