From: Tony K Nadackal <tony.kn@xxxxxxxxxxx> When queuing an OUTPUT buffer for decoder, s5p_jpeg_parse_hdr() function parses the input jpeg file and takes the width and height parameters from its header. These new width/height values will be used for the calculation of stride. HX_JPEG Hardware needs the width and height values aligned on a 16 bits boundary. This width/height alignment is handled in the s5p_jpeg_s_fmt_vid_cap() function during the S_FMT ioctl call. But if user space calls the QBUF of OUTPUT buffer after the S_FMT of CAPTURE buffer, these aligned values will be replaced by the values in jpeg header. If the width/height values of jpeg are not aligned, the decoder output will be corrupted. So in this patch we call jpeg_bound_align_image() to align the width/height values of Capture buffer in s5p_jpeg_buf_queue(). Signed-off-by: Tony K Nadackal <tony.kn@xxxxxxxxxxx> Signed-off-by: Thierry Escande <thierry.escande@xxxxxxxxxxxxx> Acked-by: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxx> Acked-by: Jacek Anaszewski <jacek.anaszewski@xxxxxxxxx> --- drivers/media/platform/s5p-jpeg/jpeg-core.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c index 52dc794..623508d 100644 --- a/drivers/media/platform/s5p-jpeg/jpeg-core.c +++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c @@ -2523,6 +2523,25 @@ static void s5p_jpeg_buf_queue(struct vb2_buffer *vb) q_data = &ctx->cap_q; q_data->w = tmp.w; q_data->h = tmp.h; + + /* + * This call to jpeg_bound_align_image() takes care of width and + * height values alignment when user space calls the QBUF of + * OUTPUT buffer after the S_FMT of CAPTURE buffer. + * Please note that on Exynos4x12 SoCs, resigning from executing + * S_FMT on capture buffer for each JPEG image can result in a + * hardware hangup if subsampling is lower than the one of input + * JPEG. + */ + jpeg_bound_align_image(ctx, + &q_data->w, + S5P_JPEG_MIN_WIDTH, S5P_JPEG_MAX_WIDTH, + q_data->fmt->h_align, + &q_data->h, + S5P_JPEG_MIN_HEIGHT, S5P_JPEG_MAX_HEIGHT, + q_data->fmt->v_align); + + q_data->size = q_data->w * q_data->h * q_data->fmt->depth >> 3; } v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf); -- 2.7.4
