media: s5p-jpeg: Adjust buffer size for Exynos 4412

Eliminate iommu fault during encoding by adjusting image size
used for buffer size computation and ensuring that the buffer is not
overrun.

Change-Id: I4837ef4cd518732af8110725b50e8f4e1bd313a9
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>

diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index f33dd72..bcec69f 100644 (file)
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -1551,8 +1551,10 @@ static int exynos4_jpeg_get_output_buffer_size(struct s5p_jpeg_ctx *ctx,
        struct v4l2_pix_format *pix = &f->fmt.pix;
        u32 pix_fmt = f->fmt.pix.pixelformat;
        int w = pix->width, h = pix->height, wh_align;
+       int padding = 0;
 
        if (pix_fmt == V4L2_PIX_FMT_RGB32 ||
+           pix_fmt == V4L2_PIX_FMT_RGB565 ||
            pix_fmt == V4L2_PIX_FMT_NV24 ||
            pix_fmt == V4L2_PIX_FMT_NV42 ||
            pix_fmt == V4L2_PIX_FMT_NV12 ||
@@ -1568,7 +1570,10 @@ static int exynos4_jpeg_get_output_buffer_size(struct s5p_jpeg_ctx *ctx,
                               &h, S5P_JPEG_MIN_HEIGHT,
                               S5P_JPEG_MAX_HEIGHT, wh_align);
 
-       return w * h * fmt_depth >> 3;
+       if (ctx->jpeg->variant->version == SJPEG_EXYNOS4)
+               padding = PAGE_SIZE;
+
+       return (w * h * fmt_depth >> 3) + padding;
 }
 
 static int exynos3250_jpeg_try_downscale(struct s5p_jpeg_ctx *ctx,