The JPEG decoder in the CODA960 VPU can downscale images while decoding,
with a factor of 1/2, 1/4, or 1/8.
Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
---
.../media/platform/chips-media/coda-common.c | 30 ++++++++++++++-----
.../media/platform/chips-media/coda-jpeg.c | 10 ++++++-
drivers/media/platform/chips-media/coda.h | 7 +++++
3 files changed, 39 insertions(+), 8 deletions(-)
diff --git a/drivers/media/platform/chips-media/coda-common.c b/drivers/media/platform/chips-media/coda-common.c
index a57822b05070..37360cb6ddb0 100644
--- a/drivers/media/platform/chips-media/coda-common.c
+++ b/drivers/media/platform/chips-media/coda-common.c
@@ -657,6 +657,8 @@ static int coda_try_fmt_vid_cap(struct file *file, void *priv,
const struct coda_q_data *q_data_src;
const struct coda_codec *codec;
struct vb2_queue *src_vq;
+ int hscale = 0;
+ int vscale = 0;
int ret;
bool use_vdoa;
@@ -673,8 +675,13 @@ static int coda_try_fmt_vid_cap(struct file *file, void *priv,
*/
src_vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
if (vb2_is_streaming(src_vq)) {
- f->fmt.pix.width = q_data_src->width;
- f->fmt.pix.height = q_data_src->height;
+ if (q_data_src->fourcc == V4L2_PIX_FMT_JPEG &&
+ ctx->dev->devtype->product == CODA_960) {
+ hscale = coda_jpeg_scale(q_data_src->width, f->fmt.pix.width);
+ vscale = coda_jpeg_scale(q_data_src->height, f->fmt.pix.height);
+ }
+ f->fmt.pix.width = q_data_src->width >> hscale;
+ f->fmt.pix.height = q_data_src->height >> vscale;
if (q_data_src->fourcc == V4L2_PIX_FMT_JPEG) {
if (ctx->params.jpeg_chroma_subsampling ==
@@ -704,8 +711,8 @@ static int coda_try_fmt_vid_cap(struct file *file, void *priv,
/* The decoders always write complete macroblocks or MCUs */
if (ctx->inst_type == CODA_INST_DECODER) {
- f->fmt.pix.bytesperline = round_up(f->fmt.pix.width, 16);
- f->fmt.pix.height = round_up(f->fmt.pix.height, 16);
+ f->fmt.pix.bytesperline = round_up(f->fmt.pix.width, 16 >> hscale);
+ f->fmt.pix.height = round_up(f->fmt.pix.height, 16 >> vscale);
if (codec->src_fourcc == V4L2_PIX_FMT_JPEG &&
f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV422P) {
f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
@@ -850,17 +857,26 @@ static int coda_s_fmt_vid_cap(struct file *file, void *priv,
struct coda_q_data *q_data_src;
const struct coda_codec *codec;
struct v4l2_rect r;
+ int hscale = 0;
+ int vscale = 0;
int ret;
+ q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
+
+ if (q_data_src->fourcc == V4L2_PIX_FMT_JPEG &&
+ ctx->dev->devtype->product == CODA_960) {
+ hscale = coda_jpeg_scale(q_data_src->width, f->fmt.pix.width);
+ vscale = coda_jpeg_scale(q_data_src->height, f->fmt.pix.height);
+ }
+
ret = coda_try_fmt_vid_cap(file, priv, f);
if (ret)
return ret;
- q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
r.left = 0;
r.top = 0;
- r.width = q_data_src->width;
- r.height = q_data_src->height;
+ r.width = q_data_src->width >> hscale;
+ r.height = q_data_src->height >> vscale;
ret = coda_s_fmt(ctx, f, &r);
if (ret)
diff --git a/drivers/media/platform/chips-media/coda-jpeg.c b/drivers/media/platform/chips-media/coda-jpeg.c
index a72f4655e5ad..5948ada75d43 100644
--- a/drivers/media/platform/chips-media/coda-jpeg.c
+++ b/drivers/media/platform/chips-media/coda-jpeg.c
@@ -1328,6 +1328,7 @@ static int coda9_jpeg_prepare_decode(struct coda_ctx *ctx)
struct coda_q_data *q_data_src, *q_data_dst;
struct vb2_v4l2_buffer *src_buf, *dst_buf;
int chroma_interleave;
+ int scl_hor_mode, scl_ver_mode;
src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
@@ -1335,6 +1336,9 @@ static int coda9_jpeg_prepare_decode(struct coda_ctx *ctx)
q_data_dst = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
dst_fourcc = q_data_dst->fourcc;
+ scl_hor_mode = coda_jpeg_scale(q_data_src->width, q_data_dst->width);
+ scl_ver_mode = coda_jpeg_scale(q_data_src->height, q_data_dst->height);
+
if (vb2_get_plane_payload(&src_buf->vb2_buf, 0) == 0)
vb2_set_plane_payload(&src_buf->vb2_buf, 0,
vb2_plane_size(&src_buf->vb2_buf, 0));
@@ -1386,7 +1390,11 @@ static int coda9_jpeg_prepare_decode(struct coda_ctx *ctx)
coda_write(dev, 0, CODA9_REG_JPEG_ROT_INFO);
coda_write(dev, bus_req_num[chroma_format], CODA9_REG_JPEG_OP_INFO);
coda_write(dev, mcu_info[chroma_format], CODA9_REG_JPEG_MCU_INFO);
- coda_write(dev, 0, CODA9_REG_JPEG_SCL_INFO);
+ if (scl_hor_mode || scl_ver_mode)
+ val = CODA9_JPEG_SCL_ENABLE | (scl_hor_mode << 2) | scl_ver_mode;
+ else
+ val = 0;
+ coda_write(dev, val, CODA9_REG_JPEG_SCL_INFO);
coda_write(dev, chroma_interleave, CODA9_REG_JPEG_DPB_CONFIG);
coda_write(dev, ctx->params.jpeg_restart_interval,
CODA9_REG_JPEG_RST_INTVAL);
diff --git a/drivers/media/platform/chips-media/coda.h b/drivers/media/platform/chips-media/coda.h
index dcf35641c603..ddfd0a32c653 100644
--- a/drivers/media/platform/chips-media/coda.h
+++ b/drivers/media/platform/chips-media/coda.h
@@ -380,6 +380,13 @@ u32 coda_mpeg4_parse_headers(struct coda_ctx *ctx, u8 *buf, u32 size);
void coda_update_profile_level_ctrls(struct coda_ctx *ctx, u8 profile_idc,
u8 level_idc);
+static inline int coda_jpeg_scale(int src, int dst)
+{
+ return (dst <= src / 8) ? 3 :
+ (dst <= src / 4) ? 2 :
+ (dst <= src / 2) ? 1 : 0;
+}
+
bool coda_jpeg_check_buffer(struct coda_ctx *ctx, struct vb2_buffer *vb);
int coda_jpeg_decode_header(struct coda_ctx *ctx, struct vb2_buffer *vb);
int coda_jpeg_write_tables(struct coda_ctx *ctx);
--
2.30.2
