From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mailout3.samsung.com ([203.254.224.33]:34021 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754443AbaGKPUH (ORCPT ); Fri, 11 Jul 2014 11:20:07 -0400 Received: from epcpsbgm1.samsung.com (epcpsbgm1 [203.254.230.26]) by mailout3.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0N8J00EA6ZXIQGA0@mailout3.samsung.com> for linux-media@vger.kernel.org; Sat, 12 Jul 2014 00:20:06 +0900 (KST) From: Jacek Anaszewski To: linux-media@vger.kernel.org Cc: s.nawrocki@samsung.com, andrzej.p@samsung.com, Jacek Anaszewski , Kyungmin Park Subject: [PATCH v2 6/9] s5p-jpeg: Prevent erroneous downscaling for Exynos3250 SoC Date: Fri, 11 Jul 2014 17:19:47 +0200 Message-id: <1405091990-28567-7-git-send-email-j.anaszewski@samsung.com> In-reply-to: <1405091990-28567-1-git-send-email-j.anaszewski@samsung.com> References: <1405091990-28567-1-git-send-email-j.anaszewski@samsung.com> Sender: linux-media-owner@vger.kernel.org List-ID: JPEG codec on Exynos3250 SoC produces broken raw image if a JPEG is decoded to YUV420 format and downscaling by more then 2 is applied. Prevent this by asserting downscale ratio to 2. Signed-off-by: Jacek Anaszewski Signed-off-by: Kyungmin Park --- drivers/media/platform/s5p-jpeg/jpeg-core.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c index 2491ef8..1ef004b 100644 --- a/drivers/media/platform/s5p-jpeg/jpeg-core.c +++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c @@ -1317,12 +1317,16 @@ static int exynos4_jpeg_get_output_buffer_size(struct s5p_jpeg_ctx *ctx, return w * h * fmt_depth >> 3; } +static int exynos3250_jpeg_try_downscale(struct s5p_jpeg_ctx *ctx, + struct v4l2_rect *r); + static int s5p_jpeg_s_fmt(struct s5p_jpeg_ctx *ct, struct v4l2_format *f) { struct vb2_queue *vq; struct s5p_jpeg_q_data *q_data = NULL; struct v4l2_pix_format *pix = &f->fmt.pix; struct v4l2_ctrl *ctrl_subs; + struct v4l2_rect scale_rect; unsigned int f_type; vq = v4l2_m2m_get_vq(ct->fh.m2m_ctx, f->type); @@ -1382,6 +1386,20 @@ static int s5p_jpeg_s_fmt(struct s5p_jpeg_ctx *ct, struct v4l2_format *f) ct->crop_rect.width = pix->width; ct->crop_rect.height = pix->height; } + + /* + * Prevent downscaling to YUV420 format by more than 2 + * for Exynos3250 SoC as it produces broken raw image + * in such cases. + */ + if (ct->mode == S5P_JPEG_DECODE && + f_type == FMT_TYPE_CAPTURE && + ct->jpeg->variant->version == SJPEG_EXYNOS3250 && + pix->pixelformat == V4L2_PIX_FMT_YUV420 && + ct->scale_factor > 2) { + scale_rect.width = ct->out_q.w / 2; + scale_rect.height = ct->out_q.h / 2; + exynos3250_jpeg_try_downscale(ct, &scale_rect); } return 0; -- 1.7.9.5