[PATCH v2 0/9] Add support for Exynos3250 SoC to the s5p-jpeg driver

[PATCH v2 0/9] Add support for Exynos3250 SoC to the s5p-jpeg driver

[Jacek Anaszewski]

This is the second version of the patch series adding support for
jpeg codec on Exynos3250 SoC to the s5p-jpeg driver (Sylwester -
thanks for a review). Supported raw formats are: YUYV, YVYU, UYVY,
VYUY, RGB565, RGB565X, RGB32, NV12, NV21. The support includes also
scaling and cropping features.

=================
Changes since v1:
=================

- added default case to the switch statement in the function
  exynos3250_jpeg_dec_scaling_ratiofunction
- removed not supported DT properties
- improved DT documentation
- updated Kconfig entry
- corrected DTS maintainer email in the commit message

Thanks,
Jacek Anaszewski

Jacek Anaszewski (9):
  s5p-jpeg: Add support for Exynos3250 SoC
  s5p-jpeg: return error immediately after get_byte fails
  s5p-jpeg: Adjust jpeg_bound_align_image to Exynos3250 needs
  s5p-jpeg: fix g_selection op
  s5p-jpeg: Assure proper crop rectangle initialization
  s5p-jpeg: Prevent erroneous downscaling for Exynos3250 SoC
  s5p-jpeg: add chroma subsampling adjustment for Exynos3250
  Documentation: devicetree: Document sclk-jpeg clock for exynos3250
    SoC
  ARM: dts: exynos3250: add JPEG codec device node

 .../bindings/media/exynos-jpeg-codec.txt           |    9 +-
 arch/arm/boot/dts/exynos3250.dtsi                  |    9 +
 drivers/media/platform/Kconfig                     |    5 +-
 drivers/media/platform/s5p-jpeg/Makefile           |    2 +-
 drivers/media/platform/s5p-jpeg/jpeg-core.c        |  666 ++++++++++++++++++--
 drivers/media/platform/s5p-jpeg/jpeg-core.h        |   33 +-
 .../media/platform/s5p-jpeg/jpeg-hw-exynos3250.c   |  489 ++++++++++++++
 .../media/platform/s5p-jpeg/jpeg-hw-exynos3250.h   |   60 ++
 drivers/media/platform/s5p-jpeg/jpeg-regs.h        |  247 +++++++-
 9 files changed, 1462 insertions(+), 58 deletions(-)
 create mode 100644 drivers/media/platform/s5p-jpeg/jpeg-hw-exynos3250.c
 create mode 100644 drivers/media/platform/s5p-jpeg/jpeg-hw-exynos3250.h

-- 
1.7.9.5

[PATCH v2 1/9] s5p-jpeg: Add support for Exynos3250 SoC

[Jacek Anaszewski]

This patch adds support for jpeg codec on Exynos3250 SoC to
the s5p-jpeg driver. Supported raw formats are: YUYV, YVYU, UYVY,
VYUY, RGB565, RGB565X, RGB32, NV12, NV21. The support includes
also scaling and cropping features.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
 drivers/media/platform/Kconfig                     |    5 +-
 drivers/media/platform/s5p-jpeg/Makefile           |    2 +-
 drivers/media/platform/s5p-jpeg/jpeg-core.c        |  533 +++++++++++++++++++-
 drivers/media/platform/s5p-jpeg/jpeg-core.h        |   33 +-
 .../media/platform/s5p-jpeg/jpeg-hw-exynos3250.c   |  489 ++++++++++++++++++
 .../media/platform/s5p-jpeg/jpeg-hw-exynos3250.h   |   60 +++
 drivers/media/platform/s5p-jpeg/jpeg-regs.h        |  247 ++++++++-
 7 files changed, 1347 insertions(+), 22 deletions(-)
 create mode 100644 drivers/media/platform/s5p-jpeg/jpeg-hw-exynos3250.c
 create mode 100644 drivers/media/platform/s5p-jpeg/jpeg-hw-exynos3250.h

diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
index 8108c69..3077bba 100644
--- a/drivers/media/platform/Kconfig
+++ b/drivers/media/platform/Kconfig
@@ -165,12 +165,13 @@ config VIDEO_SAMSUNG_S5P_G2D
 	  2d graphics accelerator.
 
 config VIDEO_SAMSUNG_S5P_JPEG
-	tristate "Samsung S5P/Exynos4 JPEG codec driver"
+	tristate "Samsung S5P/Exynos3250/Exynos4 JPEG codec driver"
 	depends on VIDEO_DEV && VIDEO_V4L2 && (PLAT_S5P || ARCH_EXYNOS)
 	select VIDEOBUF2_DMA_CONTIG
 	select V4L2_MEM2MEM_DEV
 	---help---
-	  This is a v4l2 driver for Samsung S5P and EXYNOS4 JPEG codec
+	  This is a v4l2 driver for Samsung S5P, EXYNOS3250
+	  and EXYNOS4 JPEG codec
 
 config VIDEO_SAMSUNG_S5P_MFC
 	tristate "Samsung S5P MFC Video Codec"
diff --git a/drivers/media/platform/s5p-jpeg/Makefile b/drivers/media/platform/s5p-jpeg/Makefile
index a1a9169..9e5f214 100644
--- a/drivers/media/platform/s5p-jpeg/Makefile
+++ b/drivers/media/platform/s5p-jpeg/Makefile
@@ -1,2 +1,2 @@
-s5p-jpeg-objs := jpeg-core.o jpeg-hw-exynos4.o jpeg-hw-s5p.o
+s5p-jpeg-objs := jpeg-core.o jpeg-hw-exynos3250.o jpeg-hw-exynos4.o jpeg-hw-s5p.o
 obj-$(CONFIG_VIDEO_SAMSUNG_S5P_JPEG) += s5p-jpeg.o
diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index 0dcb796..7d604f2 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -1,6 +1,6 @@
 /* linux/drivers/media/platform/s5p-jpeg/jpeg-core.c
  *
- * Copyright (c) 2011-2013 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2011-2014 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
  * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
@@ -32,6 +32,7 @@
 #include "jpeg-core.h"
 #include "jpeg-hw-s5p.h"
 #include "jpeg-hw-exynos4.h"
+#include "jpeg-hw-exynos3250.h"
 #include "jpeg-regs.h"
 
 static struct s5p_jpeg_fmt sjpeg_formats[] = {
@@ -41,6 +42,7 @@ static struct s5p_jpeg_fmt sjpeg_formats[] = {
 		.flags		= SJPEG_FMT_FLAG_ENC_CAPTURE |
 				  SJPEG_FMT_FLAG_DEC_OUTPUT |
 				  SJPEG_FMT_FLAG_S5P |
+				  SJPEG_FMT_FLAG_EXYNOS3250 |
 				  SJPEG_FMT_FLAG_EXYNOS4,
 	},
 	{
@@ -70,6 +72,19 @@ static struct s5p_jpeg_fmt sjpeg_formats[] = {
 		.subsampling	= V4L2_JPEG_CHROMA_SUBSAMPLING_422,
 	},
 	{
+		.name		= "YUV 4:2:2 packed, YCbYCr",
+		.fourcc		= V4L2_PIX_FMT_YUYV,
+		.depth		= 16,
+		.colplanes	= 1,
+		.h_align	= 2,
+		.v_align	= 0,
+		.flags		= SJPEG_FMT_FLAG_ENC_OUTPUT |
+				  SJPEG_FMT_FLAG_DEC_CAPTURE |
+				  SJPEG_FMT_FLAG_EXYNOS3250 |
+				  SJPEG_FMT_NON_RGB,
+		.subsampling	= V4L2_JPEG_CHROMA_SUBSAMPLING_422,
+	},
+	{
 		.name		= "YUV 4:2:2 packed, YCrYCb",
 		.fourcc		= V4L2_PIX_FMT_YVYU,
 		.depth		= 16,
@@ -83,6 +98,45 @@ static struct s5p_jpeg_fmt sjpeg_formats[] = {
 		.subsampling	= V4L2_JPEG_CHROMA_SUBSAMPLING_422,
 	},
 	{
+		.name		= "YUV 4:2:2 packed, YCrYCb",
+		.fourcc		= V4L2_PIX_FMT_YVYU,
+		.depth		= 16,
+		.colplanes	= 1,
+		.h_align	= 2,
+		.v_align	= 0,
+		.flags		= SJPEG_FMT_FLAG_ENC_OUTPUT |
+				  SJPEG_FMT_FLAG_DEC_CAPTURE |
+				  SJPEG_FMT_FLAG_EXYNOS3250 |
+				  SJPEG_FMT_NON_RGB,
+		.subsampling	= V4L2_JPEG_CHROMA_SUBSAMPLING_422,
+	},
+	{
+		.name		= "YUV 4:2:2 packed, YCrYCb",
+		.fourcc		= V4L2_PIX_FMT_UYVY,
+		.depth		= 16,
+		.colplanes	= 1,
+		.h_align	= 2,
+		.v_align	= 0,
+		.flags		= SJPEG_FMT_FLAG_ENC_OUTPUT |
+				  SJPEG_FMT_FLAG_DEC_CAPTURE |
+				  SJPEG_FMT_FLAG_EXYNOS3250 |
+				  SJPEG_FMT_NON_RGB,
+		.subsampling	= V4L2_JPEG_CHROMA_SUBSAMPLING_422,
+	},
+	{
+		.name		= "YUV 4:2:2 packed, YCrYCb",
+		.fourcc		= V4L2_PIX_FMT_VYUY,
+		.depth		= 16,
+		.colplanes	= 1,
+		.h_align	= 2,
+		.v_align	= 0,
+		.flags		= SJPEG_FMT_FLAG_ENC_OUTPUT |
+				  SJPEG_FMT_FLAG_DEC_CAPTURE |
+				  SJPEG_FMT_FLAG_EXYNOS3250 |
+				  SJPEG_FMT_NON_RGB,
+		.subsampling	= V4L2_JPEG_CHROMA_SUBSAMPLING_422,
+	},
+	{
 		.name		= "RGB565",
 		.fourcc		= V4L2_PIX_FMT_RGB565,
 		.depth		= 16,
@@ -100,6 +154,32 @@ static struct s5p_jpeg_fmt sjpeg_formats[] = {
 		.fourcc		= V4L2_PIX_FMT_RGB565,
 		.depth		= 16,
 		.colplanes	= 1,
+		.h_align	= 2,
+		.v_align	= 0,
+		.flags		= SJPEG_FMT_FLAG_ENC_OUTPUT |
+				  SJPEG_FMT_FLAG_DEC_CAPTURE |
+				  SJPEG_FMT_FLAG_EXYNOS3250 |
+				  SJPEG_FMT_RGB,
+		.subsampling	= V4L2_JPEG_CHROMA_SUBSAMPLING_444,
+	},
+	{
+		.name		= "RGB565X",
+		.fourcc		= V4L2_PIX_FMT_RGB565X,
+		.depth		= 16,
+		.colplanes	= 1,
+		.h_align	= 2,
+		.v_align	= 0,
+		.flags		= SJPEG_FMT_FLAG_ENC_OUTPUT |
+				  SJPEG_FMT_FLAG_DEC_CAPTURE |
+				  SJPEG_FMT_FLAG_EXYNOS3250 |
+				  SJPEG_FMT_RGB,
+		.subsampling	= V4L2_JPEG_CHROMA_SUBSAMPLING_444,
+	},
+	{
+		.name		= "RGB565",
+		.fourcc		= V4L2_PIX_FMT_RGB565,
+		.depth		= 16,
+		.colplanes	= 1,
 		.h_align	= 0,
 		.v_align	= 0,
 		.flags		= SJPEG_FMT_FLAG_ENC_OUTPUT |
@@ -121,6 +201,19 @@ static struct s5p_jpeg_fmt sjpeg_formats[] = {
 		.subsampling	= V4L2_JPEG_CHROMA_SUBSAMPLING_444,
 	},
 	{
+		.name		= "ARGB8888, 32 bpp",
+		.fourcc		= V4L2_PIX_FMT_RGB32,
+		.depth		= 32,
+		.colplanes	= 1,
+		.h_align	= 2,
+		.v_align	= 0,
+		.flags		= SJPEG_FMT_FLAG_ENC_OUTPUT |
+				  SJPEG_FMT_FLAG_DEC_CAPTURE |
+				  SJPEG_FMT_FLAG_EXYNOS3250 |
+				  SJPEG_FMT_RGB,
+		.subsampling	= V4L2_JPEG_CHROMA_SUBSAMPLING_444,
+	},
+	{
 		.name		= "YUV 4:4:4 planar, Y/CbCr",
 		.fourcc		= V4L2_PIX_FMT_NV24,
 		.depth		= 24,
@@ -190,9 +283,23 @@ static struct s5p_jpeg_fmt sjpeg_formats[] = {
 		.fourcc		= V4L2_PIX_FMT_NV12,
 		.depth		= 12,
 		.colplanes	= 2,
+		.h_align	= 3,
+		.v_align	= 3,
+		.flags		= SJPEG_FMT_FLAG_ENC_OUTPUT |
+				  SJPEG_FMT_FLAG_DEC_CAPTURE |
+				  SJPEG_FMT_FLAG_EXYNOS3250 |
+				  SJPEG_FMT_NON_RGB,
+		.subsampling	= V4L2_JPEG_CHROMA_SUBSAMPLING_420,
+	},
+	{
+		.name		= "YUV 4:2:0 planar, Y/CbCr",
+		.fourcc		= V4L2_PIX_FMT_NV12,
+		.depth		= 12,
+		.colplanes	= 2,
 		.h_align	= 4,
 		.v_align	= 4,
-		.flags		= SJPEG_FMT_FLAG_DEC_CAPTURE |
+		.flags		= SJPEG_FMT_FLAG_ENC_OUTPUT |
+				  SJPEG_FMT_FLAG_DEC_CAPTURE |
 				  SJPEG_FMT_FLAG_S5P |
 				  SJPEG_FMT_NON_RGB,
 		.subsampling	= V4L2_JPEG_CHROMA_SUBSAMPLING_420,
@@ -202,10 +309,24 @@ static struct s5p_jpeg_fmt sjpeg_formats[] = {
 		.fourcc		= V4L2_PIX_FMT_NV21,
 		.depth		= 12,
 		.colplanes	= 2,
+		.h_align	= 3,
+		.v_align	= 3,
+		.flags		= SJPEG_FMT_FLAG_ENC_OUTPUT |
+				  SJPEG_FMT_FLAG_DEC_CAPTURE |
+				  SJPEG_FMT_FLAG_EXYNOS3250 |
+				  SJPEG_FMT_NON_RGB,
+		.subsampling	= V4L2_JPEG_CHROMA_SUBSAMPLING_420,
+	},
+	{
+		.name		= "YUV 4:2:0 planar, Y/CrCb",
+		.fourcc		= V4L2_PIX_FMT_NV21,
+		.depth		= 12,
+		.colplanes	= 2,
 		.h_align	= 1,
 		.v_align	= 1,
 		.flags		= SJPEG_FMT_FLAG_ENC_OUTPUT |
 				  SJPEG_FMT_FLAG_DEC_CAPTURE |
+				  SJPEG_FMT_FLAG_EXYNOS3250 |
 				  SJPEG_FMT_FLAG_EXYNOS4 |
 				  SJPEG_FMT_NON_RGB,
 		.subsampling	= V4L2_JPEG_CHROMA_SUBSAMPLING_420,
@@ -224,6 +345,19 @@ static struct s5p_jpeg_fmt sjpeg_formats[] = {
 		.subsampling	= V4L2_JPEG_CHROMA_SUBSAMPLING_420,
 	},
 	{
+		.name		= "YUV 4:2:0 contiguous 3-planar, Y/Cb/Cr",
+		.fourcc		= V4L2_PIX_FMT_YUV420,
+		.depth		= 12,
+		.colplanes	= 3,
+		.h_align	= 4,
+		.v_align	= 4,
+		.flags		= SJPEG_FMT_FLAG_ENC_OUTPUT |
+				  SJPEG_FMT_FLAG_DEC_CAPTURE |
+				  SJPEG_FMT_FLAG_EXYNOS3250 |
+				  SJPEG_FMT_NON_RGB,
+		.subsampling	= V4L2_JPEG_CHROMA_SUBSAMPLING_420,
+	},
+	{
 		.name		= "Gray",
 		.fourcc		= V4L2_PIX_FMT_GREY,
 		.depth		= 8,
@@ -457,6 +591,16 @@ static int exynos4x12_decoded_subsampling[] = {
 	V4L2_JPEG_CHROMA_SUBSAMPLING_420,
 };
 
+static int exynos3250_decoded_subsampling[] = {
+	V4L2_JPEG_CHROMA_SUBSAMPLING_444,
+	V4L2_JPEG_CHROMA_SUBSAMPLING_422,
+	V4L2_JPEG_CHROMA_SUBSAMPLING_420,
+	V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY,
+	-1,
+	-1,
+	V4L2_JPEG_CHROMA_SUBSAMPLING_411,
+};
+
 static inline struct s5p_jpeg_ctx *ctrl_to_ctx(struct v4l2_ctrl *c)
 {
 	return container_of(c->handler, struct s5p_jpeg_ctx, ctrl_handler);
@@ -471,14 +615,21 @@ static int s5p_jpeg_to_user_subsampling(struct s5p_jpeg_ctx *ctx)
 {
 	WARN_ON(ctx->subsampling > 3);
 
-	if (ctx->jpeg->variant->version == SJPEG_S5P) {
+	switch (ctx->jpeg->variant->version) {
+	case SJPEG_S5P:
 		if (ctx->subsampling > 2)
 			return V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY;
 		return ctx->subsampling;
-	} else {
+	case SJPEG_EXYNOS3250:
+		if (ctx->subsampling > 3)
+			return V4L2_JPEG_CHROMA_SUBSAMPLING_411;
+		return exynos3250_decoded_subsampling[ctx->subsampling];
+	case SJPEG_EXYNOS4:
 		if (ctx->subsampling > 2)
 			return V4L2_JPEG_CHROMA_SUBSAMPLING_420;
 		return exynos4x12_decoded_subsampling[ctx->subsampling];
+	default:
+		return V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY;
 	}
 }
 
@@ -646,6 +797,7 @@ static int s5p_jpeg_open(struct file *file)
 							FMT_TYPE_OUTPUT);
 		cap_fmt = s5p_jpeg_find_format(ctx, V4L2_PIX_FMT_YUYV,
 							FMT_TYPE_CAPTURE);
+		ctx->scale_factor = EXYNOS3250_DEC_SCALE_FACTOR_8_8;
 	}
 
 	ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(jpeg->m2m_dev, ctx, queue_init);
@@ -1229,6 +1381,101 @@ static int s5p_jpeg_s_fmt_vid_out(struct file *file, void *priv,
 	return s5p_jpeg_s_fmt(fh_to_ctx(priv), f);
 }
 
+static int exynos3250_jpeg_try_downscale(struct s5p_jpeg_ctx *ctx,
+				   struct v4l2_rect *r)
+{
+	int w_ratio, h_ratio, scale_factor, cur_ratio, i;
+
+	w_ratio = ctx->out_q.w / r->width;
+	h_ratio = ctx->out_q.h / r->height;
+
+	scale_factor = w_ratio > h_ratio ? w_ratio : h_ratio;
+	scale_factor = clamp_val(scale_factor, 1, 8);
+
+	/* Align scale ratio to the nearest power of 2 */
+	for (i = 0; i <= 3; ++i) {
+		cur_ratio = 1 << i;
+		if (scale_factor <= cur_ratio) {
+			ctx->scale_factor = cur_ratio;
+			break;
+		}
+	}
+
+	r->width = round_down(ctx->out_q.w / ctx->scale_factor, 2);
+	r->height = round_down(ctx->out_q.h / ctx->scale_factor, 2);
+
+	ctx->crop_rect.width = r->width;
+	ctx->crop_rect.height = r->height;
+	ctx->crop_rect.left = 0;
+	ctx->crop_rect.top = 0;
+
+	ctx->crop_altered = true;
+
+	return 0;
+}
+
+/* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
+static int enclosed_rectangle(struct v4l2_rect *a, struct v4l2_rect *b)
+{
+	if (a->left < b->left || a->top < b->top)
+		return 0;
+	if (a->left + a->width > b->left + b->width)
+		return 0;
+	if (a->top + a->height > b->top + b->height)
+		return 0;
+
+	return 1;
+}
+
+static int exynos3250_jpeg_try_crop(struct s5p_jpeg_ctx *ctx,
+				   struct v4l2_rect *r)
+{
+	struct v4l2_rect base_rect;
+	int w_step, h_step;
+
+	switch (ctx->cap_q.fmt->fourcc) {
+	case V4L2_PIX_FMT_NV12:
+	case V4L2_PIX_FMT_NV21:
+		w_step = 1;
+		h_step = 2;
+		break;
+	case V4L2_PIX_FMT_YUV420:
+		w_step = 2;
+		h_step = 2;
+		break;
+	default:
+		w_step = 1;
+		h_step = 1;
+		break;
+	}
+
+	base_rect.top = 0;
+	base_rect.left = 0;
+	base_rect.width = ctx->out_q.w;
+	base_rect.height = ctx->out_q.h;
+
+	r->width = round_down(r->width, w_step);
+	r->height = round_down(r->height, h_step);
+	r->left = round_down(r->left, 2);
+	r->top = round_down(r->top, 2);
+
+	if (!enclosed_rectangle(r, &base_rect))
+		return -EINVAL;
+
+	ctx->crop_rect.left = r->left;
+	ctx->crop_rect.top = r->top;
+	ctx->crop_rect.width = r->width;
+	ctx->crop_rect.height = r->height;
+
+	ctx->crop_altered = true;
+
+	return 0;
+}
+
+/*
+ * V4L2 controls
+ */
+
 static int s5p_jpeg_g_selection(struct file *file, void *priv,
 			 struct v4l2_selection *s)
 {
@@ -1264,6 +1511,30 @@ static int s5p_jpeg_g_selection(struct file *file, void *priv,
 /*
  * V4L2 controls
  */
+static int s5p_jpeg_s_selection(struct file *file, void *fh,
+				  struct v4l2_selection *s)
+{
+	struct s5p_jpeg_ctx *ctx = fh_to_ctx(file->private_data);
+	struct v4l2_rect *rect = &s->r;
+	int ret = -EINVAL;
+
+	if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	if (s->target == V4L2_SEL_TGT_COMPOSE) {
+		if (ctx->mode != S5P_JPEG_DECODE)
+			return -EINVAL;
+		if (ctx->jpeg->variant->version == SJPEG_EXYNOS3250)
+			ret = exynos3250_jpeg_try_downscale(ctx, rect);
+	} else if (s->target == V4L2_SEL_TGT_CROP) {
+		if (ctx->mode != S5P_JPEG_ENCODE)
+			return -EINVAL;
+		if (ctx->jpeg->variant->version == SJPEG_EXYNOS3250)
+			ret = exynos3250_jpeg_try_crop(ctx, rect);
+	}
+
+	return ret;
+}
 
 static int s5p_jpeg_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
 {
@@ -1414,6 +1685,7 @@ static const struct v4l2_ioctl_ops s5p_jpeg_ioctl_ops = {
 	.vidioc_streamoff		= v4l2_m2m_ioctl_streamoff,
 
 	.vidioc_g_selection		= s5p_jpeg_g_selection,
+	.vidioc_s_selection		= s5p_jpeg_s_selection,
 };
 
 /*
@@ -1604,6 +1876,135 @@ static void exynos4_jpeg_device_run(void *priv)
 	spin_unlock_irqrestore(&ctx->jpeg->slock, flags);
 }
 
+static void exynos3250_jpeg_set_img_addr(struct s5p_jpeg_ctx *ctx)
+{
+	struct s5p_jpeg *jpeg = ctx->jpeg;
+	struct s5p_jpeg_fmt *fmt;
+	struct vb2_buffer *vb;
+	struct s5p_jpeg_addr jpeg_addr;
+	u32 pix_size;
+
+	pix_size = ctx->cap_q.w * ctx->cap_q.h;
+
+	if (ctx->mode == S5P_JPEG_ENCODE) {
+		vb = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
+		fmt = ctx->out_q.fmt;
+	} else {
+		vb = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
+		fmt = ctx->cap_q.fmt;
+	}
+
+	jpeg_addr.y = vb2_dma_contig_plane_dma_addr(vb, 0);
+
+	if (fmt->colplanes == 2) {
+		jpeg_addr.cb = jpeg_addr.y + pix_size;
+	} else if (fmt->colplanes == 3) {
+		jpeg_addr.cb = jpeg_addr.y + pix_size;
+		if (fmt->fourcc == V4L2_PIX_FMT_YUV420)
+			jpeg_addr.cr = jpeg_addr.cb + pix_size / 4;
+		else
+			jpeg_addr.cr = jpeg_addr.cb + pix_size / 2;
+	}
+
+	exynos3250_jpeg_imgadr(jpeg->regs, &jpeg_addr);
+}
+
+static void exynos3250_jpeg_set_jpeg_addr(struct s5p_jpeg_ctx *ctx)
+{
+	struct s5p_jpeg *jpeg = ctx->jpeg;
+	struct vb2_buffer *vb;
+	unsigned int jpeg_addr = 0;
+
+	if (ctx->mode == S5P_JPEG_ENCODE)
+		vb = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
+	else
+		vb = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
+
+	jpeg_addr = vb2_dma_contig_plane_dma_addr(vb, 0);
+	exynos3250_jpeg_jpgadr(jpeg->regs, jpeg_addr);
+}
+
+static void exynos3250_jpeg_device_run(void *priv)
+{
+	struct s5p_jpeg_ctx *ctx = priv;
+	struct s5p_jpeg *jpeg = ctx->jpeg;
+	unsigned long flags;
+
+	spin_lock_irqsave(&ctx->jpeg->slock, flags);
+
+	exynos3250_jpeg_reset(jpeg->regs);
+	exynos3250_jpeg_set_dma_num(jpeg->regs);
+	exynos3250_jpeg_poweron(jpeg->regs);
+	exynos3250_jpeg_clk_set(jpeg->regs);
+	exynos3250_jpeg_proc_mode(jpeg->regs, ctx->mode);
+
+	if (ctx->mode == S5P_JPEG_ENCODE) {
+		exynos3250_jpeg_input_raw_fmt(jpeg->regs,
+					      ctx->out_q.fmt->fourcc);
+		exynos3250_jpeg_dri(jpeg->regs, ctx->restart_interval);
+
+		/*
+		 * JPEG IP allows storing 4 quantization tables
+		 * We fill table 0 for luma and table 1 for chroma
+		 */
+		s5p_jpeg_set_qtbl_lum(jpeg->regs, ctx->compr_quality);
+		s5p_jpeg_set_qtbl_chr(jpeg->regs, ctx->compr_quality);
+		/* use table 0 for Y */
+		exynos3250_jpeg_qtbl(jpeg->regs, 1, 0);
+		/* use table 1 for Cb and Cr*/
+		exynos3250_jpeg_qtbl(jpeg->regs, 2, 1);
+		exynos3250_jpeg_qtbl(jpeg->regs, 3, 1);
+
+		/* Y, Cb, Cr use Huffman table 0 */
+		exynos3250_jpeg_htbl_ac(jpeg->regs, 1);
+		exynos3250_jpeg_htbl_dc(jpeg->regs, 1);
+		exynos3250_jpeg_htbl_ac(jpeg->regs, 2);
+		exynos3250_jpeg_htbl_dc(jpeg->regs, 2);
+		exynos3250_jpeg_htbl_ac(jpeg->regs, 3);
+		exynos3250_jpeg_htbl_dc(jpeg->regs, 3);
+
+		exynos3250_jpeg_set_x(jpeg->regs, ctx->crop_rect.width);
+		exynos3250_jpeg_set_y(jpeg->regs, ctx->crop_rect.height);
+		exynos3250_jpeg_stride(jpeg->regs, ctx->out_q.fmt->fourcc,
+								ctx->out_q.w);
+		exynos3250_jpeg_offset(jpeg->regs, ctx->crop_rect.left,
+							ctx->crop_rect.top);
+		exynos3250_jpeg_set_img_addr(ctx);
+		exynos3250_jpeg_set_jpeg_addr(ctx);
+		exynos3250_jpeg_subsampling_mode(jpeg->regs, ctx->subsampling);
+
+		/* ultimately comes from sizeimage from userspace */
+		exynos3250_jpeg_enc_stream_bound(jpeg->regs, ctx->cap_q.size);
+
+		if (ctx->out_q.fmt->fourcc == V4L2_PIX_FMT_RGB565 ||
+		    ctx->out_q.fmt->fourcc == V4L2_PIX_FMT_RGB565X ||
+		    ctx->out_q.fmt->fourcc == V4L2_PIX_FMT_RGB32)
+			exynos3250_jpeg_set_y16(jpeg->regs, true);
+	} else {
+		exynos3250_jpeg_set_img_addr(ctx);
+		exynos3250_jpeg_set_jpeg_addr(ctx);
+		exynos3250_jpeg_stride(jpeg->regs, ctx->cap_q.fmt->fourcc,
+								ctx->cap_q.w);
+		exynos3250_jpeg_offset(jpeg->regs, 0, 0);
+		exynos3250_jpeg_dec_scaling_ratio(jpeg->regs,
+							ctx->scale_factor);
+		exynos3250_jpeg_dec_stream_size(jpeg->regs, ctx->out_q.size);
+		exynos3250_jpeg_output_raw_fmt(jpeg->regs,
+						ctx->cap_q.fmt->fourcc);
+	}
+
+	exynos3250_jpeg_interrupts_enable(jpeg->regs);
+
+	/* JPEG RGB to YCbCr conversion matrix */
+	exynos3250_jpeg_coef(jpeg->regs, ctx->mode);
+
+	exynos3250_jpeg_set_timer(jpeg->regs, EXYNOS3250_IRQ_TIMEOUT);
+	jpeg->irq_status = 0;
+	exynos3250_jpeg_start(jpeg->regs);
+
+	spin_unlock_irqrestore(&ctx->jpeg->slock, flags);
+}
+
 static int s5p_jpeg_job_ready(void *priv)
 {
 	struct s5p_jpeg_ctx *ctx = priv;
@@ -1621,8 +2022,14 @@ static struct v4l2_m2m_ops s5p_jpeg_m2m_ops = {
 	.device_run	= s5p_jpeg_device_run,
 	.job_ready	= s5p_jpeg_job_ready,
 	.job_abort	= s5p_jpeg_job_abort,
-}
-;
+};
+
+static struct v4l2_m2m_ops exynos3250_jpeg_m2m_ops = {
+	.device_run	= exynos3250_jpeg_device_run,
+	.job_ready	= s5p_jpeg_job_ready,
+	.job_abort	= s5p_jpeg_job_abort,
+};
+
 static struct v4l2_m2m_ops exynos4_jpeg_m2m_ops = {
 	.device_run	= exynos4_jpeg_device_run,
 	.job_ready	= s5p_jpeg_job_ready,
@@ -1895,6 +2302,70 @@ static irqreturn_t exynos4_jpeg_irq(int irq, void *priv)
 	return IRQ_HANDLED;
 }
 
+static irqreturn_t exynos3250_jpeg_irq(int irq, void *dev_id)
+{
+	struct s5p_jpeg *jpeg = dev_id;
+	struct s5p_jpeg_ctx *curr_ctx;
+	struct vb2_buffer *src_buf, *dst_buf;
+	unsigned long payload_size = 0;
+	enum vb2_buffer_state state = VB2_BUF_STATE_DONE;
+	bool interrupt_timeout = false;
+	u32 irq_status;
+
+	spin_lock(&jpeg->slock);
+
+	irq_status = exynos3250_jpeg_get_timer_status(jpeg->regs);
+	if (irq_status & EXYNOS3250_TIMER_INT_STAT) {
+		exynos3250_jpeg_clear_timer_status(jpeg->regs);
+		interrupt_timeout = true;
+		dev_err(jpeg->dev, "Interrupt timeout occurred.\n");
+	}
+
+	irq_status = exynos3250_jpeg_get_int_status(jpeg->regs);
+	exynos3250_jpeg_clear_int_status(jpeg->regs, irq_status);
+
+	jpeg->irq_status |= irq_status;
+
+	curr_ctx = v4l2_m2m_get_curr_priv(jpeg->m2m_dev);
+
+	if (!curr_ctx)
+		goto exit_unlock;
+
+	if ((irq_status & EXYNOS3250_HEADER_STAT) &&
+	    (curr_ctx->mode == S5P_JPEG_DECODE)) {
+		exynos3250_jpeg_rstart(jpeg->regs);
+		goto exit_unlock;
+	}
+
+	if (jpeg->irq_status & (EXYNOS3250_JPEG_DONE |
+				EXYNOS3250_WDMA_DONE |
+				EXYNOS3250_RDMA_DONE |
+				EXYNOS3250_RESULT_STAT))
+		payload_size = exynos3250_jpeg_compressed_size(jpeg->regs);
+	else if (interrupt_timeout)
+		state = VB2_BUF_STATE_ERROR;
+	else
+		goto exit_unlock;
+
+	src_buf = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
+	dst_buf = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
+
+	dst_buf->v4l2_buf.timecode = src_buf->v4l2_buf.timecode;
+	dst_buf->v4l2_buf.timestamp = src_buf->v4l2_buf.timestamp;
+
+	v4l2_m2m_buf_done(src_buf, state);
+	if (curr_ctx->mode == S5P_JPEG_ENCODE)
+		vb2_set_plane_payload(dst_buf, 0, payload_size);
+	v4l2_m2m_buf_done(dst_buf, state);
+	v4l2_m2m_job_finish(jpeg->m2m_dev, curr_ctx->fh.m2m_ctx);
+
+	curr_ctx->subsampling =
+			exynos3250_jpeg_get_subsampling_mode(jpeg->regs);
+exit_unlock:
+	spin_unlock(&jpeg->slock);
+	return IRQ_HANDLED;
+}
+
 static void *jpeg_get_drv_data(struct device *dev);
 
 /*
@@ -1950,6 +2421,15 @@ static int s5p_jpeg_probe(struct platform_device *pdev)
 	}
 	dev_dbg(&pdev->dev, "clock source %p\n", jpeg->clk);
 
+	if (jpeg->variant->has_sclk) {
+		jpeg->sclk = clk_get(&pdev->dev, "sclk-jpeg");
+		if (IS_ERR(jpeg->sclk)) {
+			dev_err(&pdev->dev, "cannot get clock\n");
+			ret = PTR_ERR(jpeg->sclk);
+			return ret;
+		}
+	}
+
 	/* v4l2 device */
 	ret = v4l2_device_register(&pdev->dev, &jpeg->v4l2_dev);
 	if (ret) {
@@ -2057,6 +2537,8 @@ device_register_rollback:
 
 clk_get_rollback:
 	clk_put(jpeg->clk);
+	if (jpeg->variant->has_sclk)
+		clk_put(jpeg->sclk);
 
 	return ret;
 }
@@ -2075,10 +2557,15 @@ static int s5p_jpeg_remove(struct platform_device *pdev)
 	v4l2_m2m_release(jpeg->m2m_dev);
 	v4l2_device_unregister(&jpeg->v4l2_dev);
 
-	if (!pm_runtime_status_suspended(&pdev->dev))
+	if (!pm_runtime_status_suspended(&pdev->dev)) {
 		clk_disable_unprepare(jpeg->clk);
+		if (jpeg->variant->has_sclk)
+			clk_disable_unprepare(jpeg->sclk);
+	}
 
 	clk_put(jpeg->clk);
+	if (jpeg->variant->has_sclk)
+		clk_put(jpeg->sclk);
 
 	return 0;
 }
@@ -2088,6 +2575,8 @@ static int s5p_jpeg_runtime_suspend(struct device *dev)
 	struct s5p_jpeg *jpeg = dev_get_drvdata(dev);
 
 	clk_disable_unprepare(jpeg->clk);
+	if (jpeg->variant->has_sclk)
+		clk_disable_unprepare(jpeg->sclk);
 
 	return 0;
 }
@@ -2102,15 +2591,24 @@ static int s5p_jpeg_runtime_resume(struct device *dev)
 	if (ret < 0)
 		return ret;
 
+	if (jpeg->variant->has_sclk) {
+		ret = clk_prepare_enable(jpeg->sclk);
+		if (ret < 0)
+			return ret;
+	}
+
 	spin_lock_irqsave(&jpeg->slock, flags);
 
 	/*
-	 * JPEG IP allows storing two Huffman tables for each component
+	 * JPEG IP allows storing two Huffman tables for each component.
 	 * We fill table 0 for each component and do this here only
-	 * for S5PC210 device as Exynos4x12 requires programming its
-	 * Huffman tables each time the encoding process is initialized.
+	 * for S5PC210 and Exynos3250 SoCs. Exynos4x12 SoC requires
+	 * programming its Huffman tables each time the encoding process
+	 * is initialized, and thus it is accomplished in the device_run
+	 * callback of m2m_ops.
 	 */
-	if (jpeg->variant->version == SJPEG_S5P) {
+	if (jpeg->variant->version == SJPEG_S5P ||
+	    jpeg->variant->version == SJPEG_EXYNOS3250) {
 		s5p_jpeg_set_hdctbl(jpeg->regs);
 		s5p_jpeg_set_hdctblg(jpeg->regs);
 		s5p_jpeg_set_hactbl(jpeg->regs);
@@ -2150,6 +2648,14 @@ static struct s5p_jpeg_variant s5p_jpeg_drvdata = {
 	.fmt_ver_flag	= SJPEG_FMT_FLAG_S5P,
 };
 
+static struct s5p_jpeg_variant exynos3250_jpeg_drvdata = {
+	.version	= SJPEG_EXYNOS3250,
+	.jpeg_irq	= exynos3250_jpeg_irq,
+	.m2m_ops	= &exynos3250_jpeg_m2m_ops,
+	.has_sclk	= true,
+	.fmt_ver_flag	= SJPEG_FMT_FLAG_EXYNOS3250,
+};
+
 static struct s5p_jpeg_variant exynos4_jpeg_drvdata = {
 	.version	= SJPEG_EXYNOS4,
 	.jpeg_irq	= exynos4_jpeg_irq,
@@ -2162,8 +2668,11 @@ static const struct of_device_id samsung_jpeg_match[] = {
 		.compatible = "samsung,s5pv210-jpeg",
 		.data = &s5p_jpeg_drvdata,
 	}, {
+		.compatible = "samsung,exynos3250-jpeg",
+		.data = &exynos3250_jpeg_drvdata,
+	}, {
 		.compatible = "samsung,exynos4210-jpeg",
-		.data = &s5p_jpeg_drvdata,
+		.data = &exynos4_jpeg_drvdata,
 	}, {
 		.compatible = "samsung,exynos4212-jpeg",
 		.data = &exynos4_jpeg_drvdata,
diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.h b/drivers/media/platform/s5p-jpeg/jpeg-core.h
index 3e47863..de3228e 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.h
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.h
@@ -35,6 +35,8 @@
 #define S5P_JPEG_COEF32			0x6e
 #define S5P_JPEG_COEF33			0x13
 
+#define EXYNOS3250_IRQ_TIMEOUT		0x10000000
+
 /* a selection of JPEG markers */
 #define TEM				0x01
 #define SOF0				0xc0
@@ -49,9 +51,10 @@
 #define SJPEG_FMT_FLAG_DEC_CAPTURE	(1 << 2)
 #define SJPEG_FMT_FLAG_DEC_OUTPUT	(1 << 3)
 #define SJPEG_FMT_FLAG_S5P		(1 << 4)
-#define SJPEG_FMT_FLAG_EXYNOS4		(1 << 5)
-#define SJPEG_FMT_RGB			(1 << 6)
-#define SJPEG_FMT_NON_RGB		(1 << 7)
+#define SJPEG_FMT_FLAG_EXYNOS3250	(1 << 5)
+#define SJPEG_FMT_FLAG_EXYNOS4		(1 << 6)
+#define SJPEG_FMT_RGB			(1 << 7)
+#define SJPEG_FMT_NON_RGB		(1 << 8)
 
 #define S5P_JPEG_ENCODE		0
 #define S5P_JPEG_DECODE		1
@@ -65,8 +68,9 @@
 
 /* Version numbers */
 
-#define SJPEG_S5P	1
-#define SJPEG_EXYNOS4	2
+#define SJPEG_S5P		1
+#define SJPEG_EXYNOS3250	2
+#define SJPEG_EXYNOS4		3
 
 enum exynos4_jpeg_result {
 	OK_ENC_OR_DEC,
@@ -95,8 +99,13 @@ enum  exynos4_jpeg_img_quality_level {
  * @regs:		JPEG IP registers mapping
  * @irq:		JPEG IP irq
  * @clk:		JPEG IP clock
+ * @sclk:		Exynos3250 JPEG IP special clock
  * @dev:		JPEG IP struct device
  * @alloc_ctx:		videobuf2 memory allocator's context
+ * @variant:		driver variant to be used
+ * @irq_status		interrupt flags set during single encode/decode
+			operation
+
  */
 struct s5p_jpeg {
 	struct mutex		lock;
@@ -111,9 +120,11 @@ struct s5p_jpeg {
 	unsigned int		irq;
 	enum exynos4_jpeg_result irq_ret;
 	struct clk		*clk;
+	struct clk		*sclk;
 	struct device		*dev;
 	void			*alloc_ctx;
 	struct s5p_jpeg_variant *variant;
+	u32			irq_status;
 };
 
 struct s5p_jpeg_variant {
@@ -121,6 +132,7 @@ struct s5p_jpeg_variant {
 	unsigned int		fmt_ver_flag;
 	struct v4l2_m2m_ops	*m2m_ops;
 	irqreturn_t		(*jpeg_irq)(int irq, void *priv);
+	unsigned int		has_sclk:1;
 };
 
 /**
@@ -164,9 +176,15 @@ struct s5p_jpeg_q_data {
  * @jpeg:		JPEG IP device for this context
  * @mode:		compression (encode) operation or decompression (decode)
  * @compr_quality:	destination image quality in compression (encode) mode
+ * @restart_interval:	JPEG restart interval for JPEG encoding
+ * @subsampling:	subsampling of a raw format or a JPEG
  * @out_q:		source (output) queue information
- * @cap_fmt:		destination (capture) queue queue information
+ * @cap_q:		destination (capture) queue queue information
+ * @scale_factor:	scale factor for JPEG decoding
+ * @crop_rect:		a rectangle representing crop area of the output buffer
+ * @fh:			V4L2 file handle
  * @hdr_parsed:		set if header has been parsed during decompression
+ * @crop_altered:	set if crop rectangle has been altered by the user space
  * @ctrl_handler:	controls handler
  */
 struct s5p_jpeg_ctx {
@@ -177,8 +195,11 @@ struct s5p_jpeg_ctx {
 	unsigned short		subsampling;
 	struct s5p_jpeg_q_data	out_q;
 	struct s5p_jpeg_q_data	cap_q;
+	unsigned int		scale_factor;
+	struct v4l2_rect	crop_rect;
 	struct v4l2_fh		fh;
 	bool			hdr_parsed;
+	bool			crop_altered;
 	struct v4l2_ctrl_handler ctrl_handler;
 };
 
diff --git a/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos3250.c b/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos3250.c
new file mode 100644
index 0000000..14327a4
--- /dev/null
+++ b/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos3250.c
@@ -0,0 +1,489 @@
+/* linux/drivers/media/platform/exynos3250-jpeg/jpeg-hw.h
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Author: Jacek Anaszewski <j.anaszewski@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/io.h>
+#include <linux/videodev2.h>
+#include <linux/delay.h>
+
+#include "jpeg-core.h"
+#include "jpeg-regs.h"
+#include "jpeg-hw-exynos3250.h"
+
+void exynos3250_jpeg_reset(void __iomem *regs)
+{
+	u32 reg = 0;
+	int count = 1000;
+
+	writel(1, regs + EXYNOS3250_SW_RESET);
+	/* no other way but polling for when JPEG IP becomes operational */
+	while (reg != 0 && --count > 0) {
+		udelay(1);
+		cpu_relax();
+		reg = readl(regs + EXYNOS3250_SW_RESET);
+	}
+
+	reg = 0;
+	count = 1000;
+
+	while (reg != 1 && --count > 0) {
+		writel(1, regs + EXYNOS3250_JPGDRI);
+		udelay(1);
+		cpu_relax();
+		reg = readl(regs + EXYNOS3250_JPGDRI);
+	}
+
+	writel(0, regs + EXYNOS3250_JPGDRI);
+}
+
+void exynos3250_jpeg_poweron(void __iomem *regs)
+{
+	writel(EXYNOS3250_POWER_ON, regs + EXYNOS3250_JPGCLKCON);
+}
+
+void exynos3250_jpeg_set_dma_num(void __iomem *regs)
+{
+	writel(((EXYNOS3250_DMA_MO_COUNT << EXYNOS3250_WDMA_ISSUE_NUM_SHIFT) &
+			EXYNOS3250_WDMA_ISSUE_NUM_MASK) |
+	       ((EXYNOS3250_DMA_MO_COUNT << EXYNOS3250_RDMA_ISSUE_NUM_SHIFT) &
+			EXYNOS3250_RDMA_ISSUE_NUM_MASK) |
+	       ((EXYNOS3250_DMA_MO_COUNT << EXYNOS3250_ISSUE_GATHER_NUM_SHIFT) &
+			EXYNOS3250_ISSUE_GATHER_NUM_MASK),
+		regs + EXYNOS3250_DMA_ISSUE_NUM);
+}
+
+void exynos3250_jpeg_clk_set(void __iomem *base)
+{
+	u32 reg;
+
+	reg = readl(base + EXYNOS3250_JPGCMOD) & ~EXYNOS3250_HALF_EN_MASK;
+
+	writel(reg | EXYNOS3250_HALF_EN, base + EXYNOS3250_JPGCMOD);
+}
+
+void exynos3250_jpeg_input_raw_fmt(void __iomem *regs, unsigned int fmt)
+{
+	u32 reg;
+
+	reg = readl(regs + EXYNOS3250_JPGCMOD) &
+			EXYNOS3250_MODE_Y16_MASK;
+
+	switch (fmt) {
+	case V4L2_PIX_FMT_RGB32:
+		reg |= EXYNOS3250_MODE_SEL_ARGB8888;
+		break;
+	case V4L2_PIX_FMT_BGR32:
+		reg |= EXYNOS3250_MODE_SEL_ARGB8888 | EXYNOS3250_SRC_SWAP_RGB;
+		break;
+	case V4L2_PIX_FMT_RGB565:
+		reg |= EXYNOS3250_MODE_SEL_RGB565;
+		break;
+	case V4L2_PIX_FMT_RGB565X:
+		reg |= EXYNOS3250_MODE_SEL_RGB565 | EXYNOS3250_SRC_SWAP_RGB;
+		break;
+	case V4L2_PIX_FMT_YUYV:
+		reg |= EXYNOS3250_MODE_SEL_422_1P_LUM_CHR;
+		break;
+	case V4L2_PIX_FMT_YVYU:
+		reg |= EXYNOS3250_MODE_SEL_422_1P_LUM_CHR |
+			EXYNOS3250_SRC_SWAP_UV;
+		break;
+	case V4L2_PIX_FMT_UYVY:
+		reg |= EXYNOS3250_MODE_SEL_422_1P_CHR_LUM;
+		break;
+	case V4L2_PIX_FMT_VYUY:
+		reg |= EXYNOS3250_MODE_SEL_422_1P_CHR_LUM |
+			EXYNOS3250_SRC_SWAP_UV;
+		break;
+	case V4L2_PIX_FMT_NV12:
+		reg |= EXYNOS3250_MODE_SEL_420_2P | EXYNOS3250_SRC_NV12;
+		break;
+	case V4L2_PIX_FMT_NV21:
+		reg |= EXYNOS3250_MODE_SEL_420_2P | EXYNOS3250_SRC_NV21;
+		break;
+	case V4L2_PIX_FMT_YUV420:
+		reg |= EXYNOS3250_MODE_SEL_420_3P;
+		break;
+	default:
+		break;
+
+	}
+
+	writel(reg, regs + EXYNOS3250_JPGCMOD);
+}
+
+void exynos3250_jpeg_set_y16(void __iomem *regs, bool y16)
+{
+	u32 reg;
+
+	reg = readl(regs + EXYNOS3250_JPGCMOD);
+	if (y16)
+		reg |= EXYNOS3250_MODE_Y16;
+	else
+		reg &= ~EXYNOS3250_MODE_Y16_MASK;
+	writel(reg, regs + EXYNOS3250_JPGCMOD);
+}
+
+void exynos3250_jpeg_proc_mode(void __iomem *regs, unsigned int mode)
+{
+	u32 reg, m;
+
+	if (mode == S5P_JPEG_ENCODE)
+		m = EXYNOS3250_PROC_MODE_COMPR;
+	else
+		m = EXYNOS3250_PROC_MODE_DECOMPR;
+	reg = readl(regs + EXYNOS3250_JPGMOD);
+	reg &= ~EXYNOS3250_PROC_MODE_MASK;
+	reg |= m;
+	writel(reg, regs + EXYNOS3250_JPGMOD);
+}
+
+void exynos3250_jpeg_subsampling_mode(void __iomem *regs, unsigned int mode)
+{
+	u32 reg, m = 0;
+
+	switch (mode) {
+	case V4L2_JPEG_CHROMA_SUBSAMPLING_444:
+		m = EXYNOS3250_SUBSAMPLING_MODE_444;
+		break;
+	case V4L2_JPEG_CHROMA_SUBSAMPLING_422:
+		m = EXYNOS3250_SUBSAMPLING_MODE_422;
+		break;
+	case V4L2_JPEG_CHROMA_SUBSAMPLING_420:
+		m = EXYNOS3250_SUBSAMPLING_MODE_420;
+		break;
+	}
+
+	reg = readl(regs + EXYNOS3250_JPGMOD);
+	reg &= ~EXYNOS3250_SUBSAMPLING_MODE_MASK;
+	reg |= m;
+	writel(reg, regs + EXYNOS3250_JPGMOD);
+}
+
+unsigned int exynos3250_jpeg_get_subsampling_mode(void __iomem *regs)
+{
+	return readl(regs + EXYNOS3250_JPGMOD) &
+				EXYNOS3250_SUBSAMPLING_MODE_MASK;
+}
+
+void exynos3250_jpeg_dri(void __iomem *regs, unsigned int dri)
+{
+	u32 reg;
+
+	reg = dri & EXYNOS3250_JPGDRI_MASK;
+	writel(reg, regs + EXYNOS3250_JPGDRI);
+}
+
+void exynos3250_jpeg_qtbl(void __iomem *regs, unsigned int t, unsigned int n)
+{
+	unsigned long reg;
+
+	reg = readl(regs + EXYNOS3250_QHTBL);
+	reg &= ~EXYNOS3250_QT_NUM_MASK(t);
+	reg |= (n << EXYNOS3250_QT_NUM_SHIFT(t)) &
+					EXYNOS3250_QT_NUM_MASK(t);
+	writel(reg, regs + EXYNOS3250_QHTBL);
+}
+
+void exynos3250_jpeg_htbl_ac(void __iomem *regs, unsigned int t)
+{
+	unsigned long reg;
+
+	reg = readl(regs + EXYNOS3250_QHTBL);
+	reg &= ~EXYNOS3250_HT_NUM_AC_MASK(t);
+	/* this driver uses table 0 for all color components */
+	reg |= (0 << EXYNOS3250_HT_NUM_AC_SHIFT(t)) &
+					EXYNOS3250_HT_NUM_AC_MASK(t);
+	writel(reg, regs + EXYNOS3250_QHTBL);
+}
+
+void exynos3250_jpeg_htbl_dc(void __iomem *regs, unsigned int t)
+{
+	unsigned long reg;
+
+	reg = readl(regs + EXYNOS3250_QHTBL);
+	reg &= ~EXYNOS3250_HT_NUM_DC_MASK(t);
+	/* this driver uses table 0 for all color components */
+	reg |= (0 << EXYNOS3250_HT_NUM_DC_SHIFT(t)) &
+					EXYNOS3250_HT_NUM_DC_MASK(t);
+	writel(reg, regs + EXYNOS3250_QHTBL);
+}
+
+void exynos3250_jpeg_set_y(void __iomem *regs, unsigned int y)
+{
+	u32 reg;
+
+	reg = y & EXYNOS3250_JPGY_MASK;
+	writel(reg, regs + EXYNOS3250_JPGY);
+}
+
+void exynos3250_jpeg_set_x(void __iomem *regs, unsigned int x)
+{
+	u32 reg;
+
+	reg = x & EXYNOS3250_JPGX_MASK;
+	writel(reg, regs + EXYNOS3250_JPGX);
+}
+
+unsigned int exynos3250_jpeg_get_y(void __iomem *regs)
+{
+	return readl(regs + EXYNOS3250_JPGY);
+}
+
+unsigned int exynos3250_jpeg_get_x(void __iomem *regs)
+{
+	return readl(regs + EXYNOS3250_JPGX);
+}
+
+void exynos3250_jpeg_interrupts_enable(void __iomem *regs)
+{
+	u32 reg;
+
+	reg = readl(regs + EXYNOS3250_JPGINTSE);
+	reg |= (EXYNOS3250_JPEG_DONE_EN |
+		EXYNOS3250_WDMA_DONE_EN |
+		EXYNOS3250_RDMA_DONE_EN |
+		EXYNOS3250_ENC_STREAM_INT_EN |
+		EXYNOS3250_CORE_DONE_EN |
+		EXYNOS3250_ERR_INT_EN |
+		EXYNOS3250_HEAD_INT_EN);
+	writel(reg, regs + EXYNOS3250_JPGINTSE);
+}
+
+void exynos3250_jpeg_enc_stream_bound(void __iomem *regs, unsigned int size)
+{
+	u32 reg;
+
+	reg = size & EXYNOS3250_ENC_STREAM_BOUND_MASK;
+	writel(reg, regs + EXYNOS3250_ENC_STREAM_BOUND);
+}
+
+void exynos3250_jpeg_output_raw_fmt(void __iomem *regs, unsigned int fmt)
+{
+	u32 reg;
+
+	switch (fmt) {
+	case V4L2_PIX_FMT_RGB32:
+		reg = EXYNOS3250_OUT_FMT_ARGB8888;
+		break;
+	case V4L2_PIX_FMT_BGR32:
+		reg = EXYNOS3250_OUT_FMT_ARGB8888 | EXYNOS3250_OUT_SWAP_RGB;
+		break;
+	case V4L2_PIX_FMT_RGB565:
+		reg = EXYNOS3250_OUT_FMT_RGB565;
+		break;
+	case V4L2_PIX_FMT_RGB565X:
+		reg = EXYNOS3250_OUT_FMT_RGB565 | EXYNOS3250_OUT_SWAP_RGB;
+		break;
+	case V4L2_PIX_FMT_YUYV:
+		reg = EXYNOS3250_OUT_FMT_422_1P_LUM_CHR;
+		break;
+	case V4L2_PIX_FMT_YVYU:
+		reg = EXYNOS3250_OUT_FMT_422_1P_LUM_CHR |
+			EXYNOS3250_OUT_SWAP_UV;
+		break;
+	case V4L2_PIX_FMT_UYVY:
+		reg = EXYNOS3250_OUT_FMT_422_1P_CHR_LUM;
+		break;
+	case V4L2_PIX_FMT_VYUY:
+		reg = EXYNOS3250_OUT_FMT_422_1P_CHR_LUM |
+			EXYNOS3250_OUT_SWAP_UV;
+		break;
+	case V4L2_PIX_FMT_NV12:
+		reg = EXYNOS3250_OUT_FMT_420_2P | EXYNOS3250_OUT_NV12;
+		break;
+	case V4L2_PIX_FMT_NV21:
+		reg = EXYNOS3250_OUT_FMT_420_2P | EXYNOS3250_OUT_NV21;
+		break;
+	case V4L2_PIX_FMT_YUV420:
+		reg = EXYNOS3250_OUT_FMT_420_3P;
+		break;
+	default:
+		reg = 0;
+		break;
+	}
+
+	writel(reg, regs + EXYNOS3250_OUTFORM);
+}
+
+void exynos3250_jpeg_jpgadr(void __iomem *regs, unsigned int addr)
+{
+	writel(addr, regs + EXYNOS3250_JPG_JPGADR);
+}
+
+void exynos3250_jpeg_imgadr(void __iomem *regs, struct s5p_jpeg_addr *img_addr)
+{
+	writel(img_addr->y, regs + EXYNOS3250_LUMA_BASE);
+	writel(img_addr->cb, regs + EXYNOS3250_CHROMA_BASE);
+	writel(img_addr->cr, regs + EXYNOS3250_CHROMA_CR_BASE);
+}
+
+void exynos3250_jpeg_stride(void __iomem *regs, unsigned int img_fmt,
+			    unsigned int width)
+{
+	u32 reg_luma = 0, reg_cr = 0, reg_cb = 0;
+
+	switch (img_fmt) {
+	case V4L2_PIX_FMT_RGB32:
+		reg_luma = 4 * width;
+		break;
+	case V4L2_PIX_FMT_RGB565:
+	case V4L2_PIX_FMT_RGB565X:
+	case V4L2_PIX_FMT_YUYV:
+	case V4L2_PIX_FMT_YVYU:
+	case V4L2_PIX_FMT_UYVY:
+	case V4L2_PIX_FMT_VYUY:
+		reg_luma = 2 * width;
+		break;
+	case V4L2_PIX_FMT_NV12:
+	case V4L2_PIX_FMT_NV21:
+		reg_luma = width;
+		reg_cb = reg_luma;
+		break;
+	case V4L2_PIX_FMT_YUV420:
+		reg_luma = width;
+		reg_cb = reg_cr = reg_luma / 2;
+		break;
+	default:
+		break;
+	}
+
+	writel(reg_luma, regs + EXYNOS3250_LUMA_STRIDE);
+	writel(reg_cb, regs + EXYNOS3250_CHROMA_STRIDE);
+	writel(reg_cr, regs + EXYNOS3250_CHROMA_CR_STRIDE);
+}
+
+void exynos3250_jpeg_offset(void __iomem *regs, unsigned int x_offset,
+				unsigned int y_offset)
+{
+	u32 reg;
+
+	reg = (y_offset << EXYNOS3250_LUMA_YY_OFFSET_SHIFT) &
+			EXYNOS3250_LUMA_YY_OFFSET_MASK;
+	reg |= (x_offset << EXYNOS3250_LUMA_YX_OFFSET_SHIFT) &
+			EXYNOS3250_LUMA_YX_OFFSET_MASK;
+
+	writel(reg, regs + EXYNOS3250_LUMA_XY_OFFSET);
+
+	reg = (y_offset << EXYNOS3250_CHROMA_YY_OFFSET_SHIFT) &
+			EXYNOS3250_CHROMA_YY_OFFSET_MASK;
+	reg |= (x_offset << EXYNOS3250_CHROMA_YX_OFFSET_SHIFT) &
+			EXYNOS3250_CHROMA_YX_OFFSET_MASK;
+
+	writel(reg, regs + EXYNOS3250_CHROMA_XY_OFFSET);
+
+	reg = (y_offset << EXYNOS3250_CHROMA_CR_YY_OFFSET_SHIFT) &
+			EXYNOS3250_CHROMA_CR_YY_OFFSET_MASK;
+	reg |= (x_offset << EXYNOS3250_CHROMA_CR_YX_OFFSET_SHIFT) &
+			EXYNOS3250_CHROMA_CR_YX_OFFSET_MASK;
+
+	writel(reg, regs + EXYNOS3250_CHROMA_CR_XY_OFFSET);
+}
+
+void exynos3250_jpeg_coef(void __iomem *base, unsigned int mode)
+{
+	if (mode == S5P_JPEG_ENCODE) {
+		writel(EXYNOS3250_JPEG_ENC_COEF1,
+					base + EXYNOS3250_JPG_COEF(1));
+		writel(EXYNOS3250_JPEG_ENC_COEF2,
+					base + EXYNOS3250_JPG_COEF(2));
+		writel(EXYNOS3250_JPEG_ENC_COEF3,
+					base + EXYNOS3250_JPG_COEF(3));
+	} else {
+		writel(EXYNOS3250_JPEG_DEC_COEF1,
+					base + EXYNOS3250_JPG_COEF(1));
+		writel(EXYNOS3250_JPEG_DEC_COEF2,
+					base + EXYNOS3250_JPG_COEF(2));
+		writel(EXYNOS3250_JPEG_DEC_COEF3,
+					base + EXYNOS3250_JPG_COEF(3));
+	}
+}
+
+void exynos3250_jpeg_start(void __iomem *regs)
+{
+	writel(1, regs + EXYNOS3250_JSTART);
+}
+
+void exynos3250_jpeg_rstart(void __iomem *regs)
+{
+	writel(1, regs + EXYNOS3250_JRSTART);
+}
+
+unsigned int exynos3250_jpeg_get_int_status(void __iomem *regs)
+{
+	return readl(regs + EXYNOS3250_JPGINTST);
+}
+
+void exynos3250_jpeg_clear_int_status(void __iomem *regs,
+						unsigned int value)
+{
+	return writel(value, regs + EXYNOS3250_JPGINTST);
+}
+
+unsigned int exynos3250_jpeg_operating(void __iomem *regs)
+{
+	return readl(regs + S5P_JPGOPR) & EXYNOS3250_JPGOPR_MASK;
+}
+
+unsigned int exynos3250_jpeg_compressed_size(void __iomem *regs)
+{
+	return readl(regs + EXYNOS3250_JPGCNT) & EXYNOS3250_JPGCNT_MASK;
+}
+
+void exynos3250_jpeg_dec_stream_size(void __iomem *regs,
+						unsigned int size)
+{
+	writel(size & EXYNOS3250_DEC_STREAM_MASK,
+				regs + EXYNOS3250_DEC_STREAM_SIZE);
+}
+
+void exynos3250_jpeg_dec_scaling_ratio(void __iomem *regs,
+						unsigned int sratio)
+{
+	switch (sratio) {
+	case 1:
+		sratio = EXYNOS3250_DEC_SCALE_FACTOR_8_8;
+		break;
+	case 2:
+		sratio = EXYNOS3250_DEC_SCALE_FACTOR_4_8;
+		break;
+	case 4:
+		sratio = EXYNOS3250_DEC_SCALE_FACTOR_2_8;
+		break;
+	case 8:
+		sratio = EXYNOS3250_DEC_SCALE_FACTOR_1_8;
+		break;
+	defaut:
+		sratio = EXYNOS3250_DEC_SCALE_FACTOR_8_8;
+		break;
+	}
+
+	writel(sratio & EXYNOS3250_DEC_SCALE_FACTOR_MASK,
+				regs + EXYNOS3250_DEC_SCALING_RATIO);
+}
+
+void exynos3250_jpeg_set_timer(void __iomem *regs, unsigned int time_value)
+{
+	time_value &= EXYNOS3250_TIMER_INIT_MASK;
+
+	writel(EXYNOS3250_TIMER_INT_STAT | time_value,
+					regs + EXYNOS3250_TIMER_SE);
+}
+
+unsigned int exynos3250_jpeg_get_timer_status(void __iomem *regs)
+{
+	return readl(regs + EXYNOS3250_TIMER_ST);
+}
+
+void exynos3250_jpeg_clear_timer_status(void __iomem *regs)
+{
+	writel(EXYNOS3250_TIMER_INT_STAT, regs + EXYNOS3250_TIMER_ST);
+}
diff --git a/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos3250.h b/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos3250.h
new file mode 100644
index 0000000..b6e3be8
--- /dev/null
+++ b/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos3250.h
@@ -0,0 +1,60 @@
+/* linux/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos3250.h
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Author: Jacek Anaszewski <j.anaszewski@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef JPEG_HW_EXYNOS3250_H_
+#define JPEG_HW_EXYNOS3250_H_
+
+#include <linux/io.h>
+#include <linux/videodev2.h>
+
+#include "jpeg-regs.h"
+
+void exynos3250_jpeg_reset(void __iomem *regs);
+void exynos3250_jpeg_poweron(void __iomem *regs);
+void exynos3250_jpeg_set_dma_num(void __iomem *regs);
+void exynos3250_jpeg_clk_set(void __iomem *base);
+void exynos3250_jpeg_input_raw_fmt(void __iomem *regs, unsigned int fmt);
+void exynos3250_jpeg_output_raw_fmt(void __iomem *regs, unsigned int fmt);
+void exynos3250_jpeg_set_y16(void __iomem *regs, bool y16);
+void exynos3250_jpeg_proc_mode(void __iomem *regs, unsigned int mode);
+void exynos3250_jpeg_subsampling_mode(void __iomem *regs, unsigned int mode);
+unsigned int exynos3250_jpeg_get_subsampling_mode(void __iomem *regs);
+void exynos3250_jpeg_dri(void __iomem *regs, unsigned int dri);
+void exynos3250_jpeg_qtbl(void __iomem *regs, unsigned int t, unsigned int n);
+void exynos3250_jpeg_htbl_ac(void __iomem *regs, unsigned int t);
+void exynos3250_jpeg_htbl_dc(void __iomem *regs, unsigned int t);
+void exynos3250_jpeg_set_y(void __iomem *regs, unsigned int y);
+void exynos3250_jpeg_set_x(void __iomem *regs, unsigned int x);
+void exynos3250_jpeg_interrupts_enable(void __iomem *regs);
+void exynos3250_jpeg_enc_stream_bound(void __iomem *regs, unsigned int size);
+void exynos3250_jpeg_outform_raw(void __iomem *regs, unsigned long format);
+void exynos3250_jpeg_jpgadr(void __iomem *regs, unsigned int addr);
+void exynos3250_jpeg_imgadr(void __iomem *regs, struct s5p_jpeg_addr *img_addr);
+void exynos3250_jpeg_stride(void __iomem *regs, unsigned int img_fmt,
+			    unsigned int width);
+void exynos3250_jpeg_offset(void __iomem *regs, unsigned int x_offset,
+				unsigned int y_offset);
+void exynos3250_jpeg_coef(void __iomem *base, unsigned int mode);
+void exynos3250_jpeg_start(void __iomem *regs);
+void exynos3250_jpeg_rstart(void __iomem *regs);
+unsigned int exynos3250_jpeg_get_int_status(void __iomem *regs);
+void exynos3250_jpeg_clear_int_status(void __iomem *regs,
+						unsigned int value);
+unsigned int exynos3250_jpeg_operating(void __iomem *regs);
+unsigned int exynos3250_jpeg_compressed_size(void __iomem *regs);
+void exynos3250_jpeg_dec_stream_size(void __iomem *regs, unsigned int size);
+void exynos3250_jpeg_dec_scaling_ratio(void __iomem *regs, unsigned int sratio);
+void exynos3250_jpeg_set_timer(void __iomem *regs, unsigned int time_value);
+unsigned int exynos3250_jpeg_get_timer_status(void __iomem *regs);
+void exynos3250_jpeg_set_timer_status(void __iomem *regs);
+void exynos3250_jpeg_clear_timer_status(void __iomem *regs);
+
+#endif /* JPEG_HW_EXYNOS3250_H_ */
diff --git a/drivers/media/platform/s5p-jpeg/jpeg-regs.h b/drivers/media/platform/s5p-jpeg/jpeg-regs.h
index 57fb05b..050fc44 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-regs.h
+++ b/drivers/media/platform/s5p-jpeg/jpeg-regs.h
@@ -2,7 +2,7 @@
  *
  * Register definition file for Samsung JPEG codec driver
  *
- * Copyright (c) 2011-2013 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2011-2014 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
  * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
@@ -373,5 +373,250 @@
 /* JPEG AC chrominance (values) Huffman table register */
 #define EXYNOS4_HUFF_TBL_HACCV	0x310
 
+/* Register and bit definitions for Exynos 3250 */
+
+/* JPEG mode register */
+#define EXYNOS3250_JPGMOD			0x00
+#define EXYNOS3250_PROC_MODE_MASK		(0x1 << 3)
+#define EXYNOS3250_PROC_MODE_DECOMPR		(0x1 << 3)
+#define EXYNOS3250_PROC_MODE_COMPR		(0x0 << 3)
+#define EXYNOS3250_SUBSAMPLING_MODE_MASK	(0x7 << 0)
+#define EXYNOS3250_SUBSAMPLING_MODE_444		(0x0 << 0)
+#define EXYNOS3250_SUBSAMPLING_MODE_422		(0x1 << 0)
+#define EXYNOS3250_SUBSAMPLING_MODE_420		(0x2 << 0)
+#define EXYNOS3250_SUBSAMPLING_MODE_411		(0x6 << 0)
+#define EXYNOS3250_SUBSAMPLING_MODE_GRAY	(0x3 << 0)
+
+/* JPEG operation status register */
+#define EXYNOS3250_JPGOPR			0x04
+#define EXYNOS3250_JPGOPR_MASK			0x01
+
+/* Quantization and Huffman tables register */
+#define EXYNOS3250_QHTBL			0x08
+#define EXYNOS3250_QT_NUM_SHIFT(t)		((((t) - 1) << 1) + 8)
+#define EXYNOS3250_QT_NUM_MASK(t)		(0x3 << EXYNOS3250_QT_NUM_SHIFT(t))
+
+/* Huffman tables */
+#define EXYNOS3250_HT_NUM_AC_SHIFT(t)		(((t) << 1) - 1)
+#define EXYNOS3250_HT_NUM_AC_MASK(t)		(0x1 << EXYNOS3250_HT_NUM_AC_SHIFT(t))
+
+#define EXYNOS3250_HT_NUM_DC_SHIFT(t)		(((t) - 1) << 1)
+#define EXYNOS3250_HT_NUM_DC_MASK(t)		(0x1 << EXYNOS3250_HT_NUM_DC_SHIFT(t))
+
+/* JPEG restart interval register */
+#define EXYNOS3250_JPGDRI			0x0c
+#define EXYNOS3250_JPGDRI_MASK			0xffff
+
+/* JPEG vertical resolution register */
+#define EXYNOS3250_JPGY				0x10
+#define EXYNOS3250_JPGY_MASK			0xffff
+
+/* JPEG horizontal resolution register */
+#define EXYNOS3250_JPGX				0x14
+#define EXYNOS3250_JPGX_MASK			0xffff
+
+/* JPEG byte count register */
+#define EXYNOS3250_JPGCNT			0x18
+#define EXYNOS3250_JPGCNT_MASK			0xffffff
+
+/* JPEG interrupt mask register */
+#define EXYNOS3250_JPGINTSE			0x1c
+#define EXYNOS3250_JPEG_DONE_EN			(1 << 11)
+#define EXYNOS3250_WDMA_DONE_EN			(1 << 10)
+#define EXYNOS3250_RDMA_DONE_EN			(1 << 9)
+#define EXYNOS3250_ENC_STREAM_INT_EN		(1 << 8)
+#define EXYNOS3250_CORE_DONE_EN			(1 << 5)
+#define EXYNOS3250_ERR_INT_EN			(1 << 4)
+#define EXYNOS3250_HEAD_INT_EN			(1 << 3)
+
+/* JPEG interrupt status register */
+#define EXYNOS3250_JPGINTST			0x20
+#define EXYNOS3250_JPEG_DONE			(1 << 11)
+#define EXYNOS3250_WDMA_DONE			(1 << 10)
+#define EXYNOS3250_RDMA_DONE			(1 << 9)
+#define EXYNOS3250_ENC_STREAM_STAT		(1 << 8)
+#define EXYNOS3250_RESULT_STAT			(1 << 5)
+#define EXYNOS3250_STREAM_STAT			(1 << 4)
+#define EXYNOS3250_HEADER_STAT			(1 << 3)
+
+/*
+ * Base address of the luma component DMA buffer
+ * of the raw input or output image.
+ */
+#define EXYNOS3250_LUMA_BASE			0x100
+#define EXYNOS3250_SRC_TILE_EN_MASK		0x100
+
+/* Stride of source or destination luma raw image buffer */
+#define EXYNOS3250_LUMA_STRIDE			0x104
+
+/* Horizontal/vertical offset of active region in luma raw image buffer */
+#define EXYNOS3250_LUMA_XY_OFFSET		0x108
+#define EXYNOS3250_LUMA_YY_OFFSET_SHIFT		18
+#define EXYNOS3250_LUMA_YY_OFFSET_MASK		(0x1fff << EXYNOS3250_LUMA_YY_OFFSET_SHIFT)
+#define EXYNOS3250_LUMA_YX_OFFSET_SHIFT		2
+#define EXYNOS3250_LUMA_YX_OFFSET_MASK		(0x1fff << EXYNOS3250_LUMA_YX_OFFSET_SHIFT)
+
+/*
+ * Base address of the chroma(Cb) component DMA buffer
+ * of the raw input or output image.
+ */
+#define EXYNOS3250_CHROMA_BASE			0x10c
+
+/* Stride of source or destination chroma(Cb) raw image buffer */
+#define EXYNOS3250_CHROMA_STRIDE		0x110
+
+/* Horizontal/vertical offset of active region in chroma(Cb) raw image buffer */
+#define EXYNOS3250_CHROMA_XY_OFFSET		0x114
+#define EXYNOS3250_CHROMA_YY_OFFSET_SHIFT	18
+#define EXYNOS3250_CHROMA_YY_OFFSET_MASK	(0x1fff << EXYNOS3250_CHROMA_YY_OFFSET_SHIFT)
+#define EXYNOS3250_CHROMA_YX_OFFSET_SHIFT	2
+#define EXYNOS3250_CHROMA_YX_OFFSET_MASK	(0x1fff << EXYNOS3250_CHROMA_YX_OFFSET_SHIFT)
+
+/*
+ * Base address of the chroma(Cr) component DMA buffer
+ * of the raw input or output image.
+ */
+#define EXYNOS3250_CHROMA_CR_BASE		0x118
+
+/* Stride of source or destination chroma(Cr) raw image buffer */
+#define EXYNOS3250_CHROMA_CR_STRIDE		0x11c
+
+/* Horizontal/vertical offset of active region in chroma(Cb) raw image buffer */
+#define EXYNOS3250_CHROMA_CR_XY_OFFSET		0x120
+#define EXYNOS3250_CHROMA_CR_YY_OFFSET_SHIFT	18
+#define EXYNOS3250_CHROMA_CR_YY_OFFSET_MASK	(0x1fff << EXYNOS3250_CHROMA_CR_YY_OFFSET_SHIFT)
+#define EXYNOS3250_CHROMA_CR_YX_OFFSET_SHIFT	2
+#define EXYNOS3250_CHROMA_CR_YX_OFFSET_MASK	(0x1fff << EXYNOS3250_CHROMA_CR_YX_OFFSET_SHIFT)
+
+/* Raw image data r/w address register */
+#define EXYNOS3250_JPG_IMGADR			0x50
+
+/* Source or destination JPEG file DMA buffer address */
+#define EXYNOS3250_JPG_JPGADR			0x124
+
+/* Coefficients for RGB-to-YCbCr converter register */
+#define EXYNOS3250_JPG_COEF(n)			(0x128 + (((n) - 1) << 2))
+#define EXYNOS3250_COEF_SHIFT(j)		((3 - (j)) << 3)
+#define EXYNOS3250_COEF_MASK(j)			(0xff << EXYNOS3250_COEF_SHIFT(j))
+
+/* Raw input format setting */
+#define EXYNOS3250_JPGCMOD			0x134
+#define EXYNOS3250_SRC_TILE_EN			(0x1 << 10)
+#define EXYNOS3250_SRC_NV_MASK			(0x1 << 9)
+#define EXYNOS3250_SRC_NV12			(0x0 << 9)
+#define EXYNOS3250_SRC_NV21			(0x1 << 9)
+#define EXYNOS3250_SRC_BIG_ENDIAN_MASK		(0x1 << 8)
+#define EXYNOS3250_SRC_BIG_ENDIAN		(0x1 << 8)
+#define EXYNOS3250_MODE_SEL_MASK		(0x7 << 5)
+#define EXYNOS3250_MODE_SEL_420_2P		(0x0 << 5)
+#define EXYNOS3250_MODE_SEL_422_1P_LUM_CHR	(0x1 << 5)
+#define EXYNOS3250_MODE_SEL_RGB565		(0x2 << 5)
+#define EXYNOS3250_MODE_SEL_422_1P_CHR_LUM	(0x3 << 5)
+#define EXYNOS3250_MODE_SEL_ARGB8888		(0x4 << 5)
+#define EXYNOS3250_MODE_SEL_420_3P		(0x5 << 5)
+#define EXYNOS3250_SRC_SWAP_RGB			(0x1 << 3)
+#define EXYNOS3250_SRC_SWAP_UV			(0x1 << 2)
+#define EXYNOS3250_MODE_Y16_MASK		(0x1 << 1)
+#define EXYNOS3250_MODE_Y16			(0x1 << 1)
+#define EXYNOS3250_HALF_EN_MASK			(0x1 << 0)
+#define EXYNOS3250_HALF_EN			(0x1 << 0)
+
+/* Power on/off and clock down control */
+#define EXYNOS3250_JPGCLKCON			0x138
+#define EXYNOS3250_CLK_DOWN_READY		(0x1 << 1)
+#define EXYNOS3250_POWER_ON			(0x1 << 0)
+
+/* Start compression or decompression */
+#define EXYNOS3250_JSTART			0x13c
+
+/* Restart decompression after header analysis */
+#define EXYNOS3250_JRSTART			0x140
+
+/* JPEG SW reset register */
+#define EXYNOS3250_SW_RESET			0x144
+
+/* JPEG timer setting register */
+#define EXYNOS3250_TIMER_SE			0x148
+#define EXYNOS3250_TIMER_INT_EN_SHIFT		31
+#define EXYNOS3250_TIMER_INT_EN			(1 << EXYNOS3250_TIMER_INT_EN_SHIFT)
+#define EXYNOS3250_TIMER_INIT_MASK		0x7fffffff
+
+/* JPEG timer status register */
+#define EXYNOS3250_TIMER_ST			0x14c
+#define EXYNOS3250_TIMER_INT_STAT_SHIFT		31
+#define EXYNOS3250_TIMER_INT_STAT		(1 << EXYNOS3250_TIMER_INT_STAT_SHIFT)
+#define EXYNOS3250_TIMER_CNT_SHIFT		0
+#define EXYNOS3250_TIMER_CNT_MASK		0x7fffffff
+
+/* Command status register */
+#define EXYNOS3250_COMSTAT			0x150
+#define EXYNOS3250_CUR_PROC_MODE		(0x1 << 1)
+#define EXYNOS3250_CUR_COM_MODE			(0x1 << 0)
+
+/* JPEG decompression output format register */
+#define EXYNOS3250_OUTFORM			0x154
+#define EXYNOS3250_OUT_ALPHA_MASK		(0xff << 24)
+#define EXYNOS3250_OUT_TILE_EN			(0x1 << 10)
+#define EXYNOS3250_OUT_NV_MASK			(0x1 << 9)
+#define EXYNOS3250_OUT_NV12			(0x0 << 9)
+#define EXYNOS3250_OUT_NV21			(0x1 << 9)
+#define EXYNOS3250_OUT_BIG_ENDIAN_MASK		(0x1 << 8)
+#define EXYNOS3250_OUT_BIG_ENDIAN		(0x1 << 8)
+#define EXYNOS3250_OUT_SWAP_RGB			(0x1 << 7)
+#define EXYNOS3250_OUT_SWAP_UV			(0x1 << 6)
+#define EXYNOS3250_OUT_FMT_MASK			(0x7 << 0)
+#define EXYNOS3250_OUT_FMT_420_2P		(0x0 << 0)
+#define EXYNOS3250_OUT_FMT_422_1P_LUM_CHR	(0x1 << 0)
+#define EXYNOS3250_OUT_FMT_422_1P_CHR_LUM	(0x3 << 0)
+#define EXYNOS3250_OUT_FMT_420_3P		(0x4 << 0)
+#define EXYNOS3250_OUT_FMT_RGB565		(0x5 << 0)
+#define EXYNOS3250_OUT_FMT_ARGB8888		(0x6 << 0)
+
+/* Input JPEG stream byte size for decompression */
+#define EXYNOS3250_DEC_STREAM_SIZE		0x158
+#define EXYNOS3250_DEC_STREAM_MASK		0x1fffffff
+
+/* The upper bound of the byte size of output compressed stream */
+#define EXYNOS3250_ENC_STREAM_BOUND		0x15c
+#define EXYNOS3250_ENC_STREAM_BOUND_MASK	0xffffc0
+
+/* Scale-down ratio when decoding */
+#define EXYNOS3250_DEC_SCALING_RATIO		0x160
+#define EXYNOS3250_DEC_SCALE_FACTOR_MASK	0x3
+#define EXYNOS3250_DEC_SCALE_FACTOR_8_8		0x0
+#define EXYNOS3250_DEC_SCALE_FACTOR_4_8		0x1
+#define EXYNOS3250_DEC_SCALE_FACTOR_2_8		0x2
+#define EXYNOS3250_DEC_SCALE_FACTOR_1_8		0x3
+
+/* Error check */
+#define EXYNOS3250_CRC_RESULT			0x164
+
+/* RDMA and WDMA operation status register */
+#define EXYNOS3250_DMA_OPER_STATUS		0x168
+#define EXYNOS3250_WDMA_OPER_STATUS		(0x1 << 1)
+#define EXYNOS3250_RDMA_OPER_STATUS		(0x1 << 0)
+
+/* DMA issue gathering number and issue number settings */
+#define EXYNOS3250_DMA_ISSUE_NUM		0x16c
+#define EXYNOS3250_WDMA_ISSUE_NUM_SHIFT		16
+#define EXYNOS3250_WDMA_ISSUE_NUM_MASK		(0x7 << EXYNOS3250_WDMA_ISSUE_NUM_SHIFT)
+#define EXYNOS3250_RDMA_ISSUE_NUM_SHIFT		8
+#define EXYNOS3250_RDMA_ISSUE_NUM_MASK		(0x7 << EXYNOS3250_RDMA_ISSUE_NUM_SHIFT)
+#define EXYNOS3250_ISSUE_GATHER_NUM_SHIFT	0
+#define EXYNOS3250_ISSUE_GATHER_NUM_MASK	(0x7 << EXYNOS3250_ISSUE_GATHER_NUM_SHIFT)
+#define EXYNOS3250_DMA_MO_COUNT			0x7
+
+/* Version register */
+#define EXYNOS3250_VERSION			0x1fc
+
+/* RGB <-> YUV conversion coefficients */
+#define EXYNOS3250_JPEG_ENC_COEF1		0x01352e1e
+#define EXYNOS3250_JPEG_ENC_COEF2		0x00b0ae83
+#define EXYNOS3250_JPEG_ENC_COEF3		0x020cdc13
+
+#define EXYNOS3250_JPEG_DEC_COEF1		0x04a80199
+#define EXYNOS3250_JPEG_DEC_COEF2		0x04a9a064
+#define EXYNOS3250_JPEG_DEC_COEF3		0x04a80102
+
 #endif /* JPEG_REGS_H_ */
 
-- 
1.7.9.5

[PATCH v2 2/9] s5p-jpeg: return error immediately after get_byte fails

[Jacek Anaszewski]

When parsing JPEG header s5p_jpeg_parse_hdr function
should return immediately in case there was an error
while reading a byte.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
 drivers/media/platform/s5p-jpeg/jpeg-core.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index 7d604f2..df3aaa9 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -906,14 +906,14 @@ static bool s5p_jpeg_parse_hdr(struct s5p_jpeg_q_data *result,
 	while (notfound) {
 		c = get_byte(&jpeg_buffer);
 		if (c == -1)
-			break;
+			return false;
 		if (c != 0xff)
 			continue;
 		do
 			c = get_byte(&jpeg_buffer);
 		while (c == 0xff);
 		if (c == -1)
-			break;
+			return false;
 		if (c == 0)
 			continue;
 		length = 0;
-- 
1.7.9.5

[PATCH v2 3/9] s5p-jpeg: Adjust jpeg_bound_align_image to Exynos3250 needs

[Jacek Anaszewski]

The jpeg_bound_align_image function needs to know the context
in which it is called, as it needs to align image dimensions in
a slight different manner for Exynos3250, which crops pixels for
specific values in case the format is RGB.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
 drivers/media/platform/s5p-jpeg/jpeg-core.c |   25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index df3aaa9..0854f37 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -1133,7 +1133,8 @@ static struct s5p_jpeg_fmt *s5p_jpeg_find_format(struct s5p_jpeg_ctx *ctx,
 	return NULL;
 }
 
-static void jpeg_bound_align_image(u32 *w, unsigned int wmin, unsigned int wmax,
+static void jpeg_bound_align_image(struct s5p_jpeg_ctx *ctx,
+				   u32 *w, unsigned int wmin, unsigned int wmax,
 				   unsigned int walign,
 				   u32 *h, unsigned int hmin, unsigned int hmax,
 				   unsigned int halign)
@@ -1145,13 +1146,27 @@ static void jpeg_bound_align_image(u32 *w, unsigned int wmin, unsigned int wmax,
 
 	w_step = 1 << walign;
 	h_step = 1 << halign;
+
+	if (ctx->jpeg->variant->version == SJPEG_EXYNOS3250) {
+		/*
+		 * Rightmost and bottommost pixels are cropped by the
+		 * Exynos3250 JPEG IP for RGB formats, for the specific
+		 * width and height values respectively. This assignment
+		 * will result in v4l_bound_align_image returning dimensions
+		 * reduced by 1 for the aforementioned cases.
+		 */
+		if (w_step == 4 && ((width & 3) == 1)) {
+			wmax = width;
+			hmax = height;
+		}
+	}
+
 	v4l_bound_align_image(w, wmin, wmax, walign, h, hmin, hmax, halign, 0);
 
 	if (*w < width && (*w + w_step) < wmax)
 		*w += w_step;
 	if (*h < height && (*h + h_step) < hmax)
 		*h += h_step;
-
 }
 
 static int vidioc_try_fmt(struct v4l2_format *f, struct s5p_jpeg_fmt *fmt,
@@ -1167,12 +1182,12 @@ static int vidioc_try_fmt(struct v4l2_format *f, struct s5p_jpeg_fmt *fmt,
 	/* V4L2 specification suggests the driver corrects the format struct
 	 * if any of the dimensions is unsupported */
 	if (q_type == FMT_TYPE_OUTPUT)
-		jpeg_bound_align_image(&pix->width, S5P_JPEG_MIN_WIDTH,
+		jpeg_bound_align_image(ctx, &pix->width, S5P_JPEG_MIN_WIDTH,
 				       S5P_JPEG_MAX_WIDTH, 0,
 				       &pix->height, S5P_JPEG_MIN_HEIGHT,
 				       S5P_JPEG_MAX_HEIGHT, 0);
 	else
-		jpeg_bound_align_image(&pix->width, S5P_JPEG_MIN_WIDTH,
+		jpeg_bound_align_image(ctx, &pix->width, S5P_JPEG_MIN_WIDTH,
 				       S5P_JPEG_MAX_WIDTH, fmt->h_align,
 				       &pix->height, S5P_JPEG_MIN_HEIGHT,
 				       S5P_JPEG_MAX_HEIGHT, fmt->v_align);
@@ -1294,7 +1309,7 @@ static int exynos4_jpeg_get_output_buffer_size(struct s5p_jpeg_ctx *ctx,
 	else
 		wh_align = 1;
 
-	jpeg_bound_align_image(&w, S5P_JPEG_MIN_WIDTH,
+	jpeg_bound_align_image(ctx, &w, S5P_JPEG_MIN_WIDTH,
 			       S5P_JPEG_MAX_WIDTH, wh_align,
 			       &h, S5P_JPEG_MIN_HEIGHT,
 			       S5P_JPEG_MAX_HEIGHT, wh_align);
-- 
1.7.9.5

[PATCH v2 4/9] s5p-jpeg: fix g_selection op

[Jacek Anaszewski]

V4L2_SEL_TGT_COMPOSE_DEFAULT switch case should select whole
available area of the image and V4L2_SEL_TGT_COMPOSE
should apply user settings.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
 drivers/media/platform/s5p-jpeg/jpeg-core.c |   12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index 0854f37..09b59d3 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -1505,21 +1505,23 @@ static int s5p_jpeg_g_selection(struct file *file, void *priv,
 	case V4L2_SEL_TGT_CROP:
 	case V4L2_SEL_TGT_CROP_BOUNDS:
 	case V4L2_SEL_TGT_CROP_DEFAULT:
-	case V4L2_SEL_TGT_COMPOSE:
 	case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 		s->r.width = ctx->out_q.w;
 		s->r.height = ctx->out_q.h;
+		s->r.left = 0;
+		s->r.top = 0;
 		break;
+	case V4L2_SEL_TGT_COMPOSE:
 	case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 	case V4L2_SEL_TGT_COMPOSE_PADDED:
-		s->r.width = ctx->cap_q.w;
-		s->r.height = ctx->cap_q.h;
+		s->r.width = ctx->crop_rect.width;
+		s->r.height =  ctx->crop_rect.height;
+		s->r.left = ctx->crop_rect.left;
+		s->r.top = ctx->crop_rect.top;
 		break;
 	default:
 		return -EINVAL;
 	}
-	s->r.left = 0;
-	s->r.top = 0;
 	return 0;
 }
 
-- 
1.7.9.5

[PATCH v2 5/9] s5p-jpeg: Assure proper crop rectangle initialization

[Jacek Anaszewski]

Assure proper crop_rect initialization in case
the user space doesn't call S_SELECTION ioctl.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
 drivers/media/platform/s5p-jpeg/jpeg-core.c |   15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index 09b59d3..2491ef8 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -1367,6 +1367,21 @@ static int s5p_jpeg_s_fmt(struct s5p_jpeg_ctx *ct, struct v4l2_format *f)
 					V4L2_CID_JPEG_CHROMA_SUBSAMPLING);
 		if (ctrl_subs)
 			v4l2_ctrl_s_ctrl(ctrl_subs, q_data->fmt->subsampling);
+		ct->crop_altered = false;
+	}
+
+	/*
+	 * For decoding init crop_rect with capture buffer dimmensions which
+	 * contain aligned dimensions of the input JPEG image and do it only
+	 * if crop rectangle hasn't been altered by the user space e.g. with
+	 * S_SELECTION ioctl. For encoding assign output buffer dimensions.
+	 */
+	if (!ct->crop_altered &&
+	    ((ct->mode == S5P_JPEG_DECODE && f_type == FMT_TYPE_CAPTURE) ||
+	     (ct->mode == S5P_JPEG_ENCODE && f_type == FMT_TYPE_OUTPUT))) {
+		ct->crop_rect.width = pix->width;
+		ct->crop_rect.height = pix->height;
+	}
 	}
 
 	return 0;
-- 
1.7.9.5

[PATCH v2 6/9] s5p-jpeg: Prevent erroneous downscaling for Exynos3250 SoC

[Jacek Anaszewski]

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 <j.anaszewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
 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

[PATCH v2 7/9] s5p-jpeg: add chroma subsampling adjustment for Exynos3250

[Jacek Anaszewski]

Take into account limitations specific to the Exynos3250 SoC,
regarding setting chroma subsampling control value.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
 drivers/media/platform/s5p-jpeg/jpeg-core.c |   59 +++++++++++++++++----------
 1 file changed, 38 insertions(+), 21 deletions(-)

diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index 1ef004b..283249d 100644
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -1603,36 +1603,53 @@ static int s5p_jpeg_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
 	return 0;
 }
 
-static int s5p_jpeg_try_ctrl(struct v4l2_ctrl *ctrl)
+static int s5p_jpeg_adjust_subs_ctrl(struct s5p_jpeg_ctx *ctx, int *ctrl_val)
 {
-	struct s5p_jpeg_ctx *ctx = ctrl_to_ctx(ctrl);
-	unsigned long flags;
-	int ret = 0;
-
-	spin_lock_irqsave(&ctx->jpeg->slock, flags);
-
-	if (ctrl->id == V4L2_CID_JPEG_CHROMA_SUBSAMPLING) {
-		if (ctx->jpeg->variant->version == SJPEG_S5P)
-			goto error_free;
+	switch (ctx->jpeg->variant->version) {
+	case SJPEG_S5P:
+		return 0;
+	case SJPEG_EXYNOS3250:
+		/*
+		 * The exynos3250 device can produce JPEG image only
+		 * of 4:4:4 subsampling when given RGB32 source image.
+		 */
+		if (ctx->out_q.fmt->fourcc == V4L2_PIX_FMT_RGB32)
+			*ctrl_val = 0;
+		break;
+	case SJPEG_EXYNOS4:
 		/*
 		 * The exynos4x12 device requires input raw image fourcc
 		 * to be V4L2_PIX_FMT_GREY if gray jpeg format
 		 * is to be set.
 		 */
 		if (ctx->out_q.fmt->fourcc != V4L2_PIX_FMT_GREY &&
-		    ctrl->val == V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY) {
-			ret = -EINVAL;
-			goto error_free;
-		}
-		/*
-		 * The exynos4x12 device requires resulting jpeg subsampling
-		 * not to be lower than the input raw image subsampling.
-		 */
-		if (ctx->out_q.fmt->subsampling > ctrl->val)
-			ctrl->val = ctx->out_q.fmt->subsampling;
+		    *ctrl_val == V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY)
+			return -EINVAL;
+		break;
 	}
 
-error_free:
+	/*
+	 * The exynos4x12 and exynos3250 devices require resulting
+	 * jpeg subsampling not to be lower than the input raw image
+	 * subsampling.
+	 */
+	if (ctx->out_q.fmt->subsampling > *ctrl_val)
+		*ctrl_val = ctx->out_q.fmt->subsampling;
+
+	return 0;
+}
+
+static int s5p_jpeg_try_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct s5p_jpeg_ctx *ctx = ctrl_to_ctx(ctrl);
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(&ctx->jpeg->slock, flags);
+
+	if (ctrl->id == V4L2_CID_JPEG_CHROMA_SUBSAMPLING)
+		ret = s5p_jpeg_adjust_subs_ctrl(ctx, &ctrl->val);
+
 	spin_unlock_irqrestore(&ctx->jpeg->slock, flags);
 	return ret;
 }
-- 
1.7.9.5

[PATCH v2 8/9] Documentation: devicetree: Document sclk-jpeg clock for exynos3250 SoC

[Jacek Anaszewski]

JPEG IP on Exynos3250 SoC requires enabling two clock
gates for its operation. This patch documents this
requirement.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: devicetree@vger.kernel.org
---
 .../bindings/media/exynos-jpeg-codec.txt           |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt b/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt
index 937b755..3142745 100644
--- a/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt
+++ b/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt
@@ -3,9 +3,12 @@ Samsung S5P/EXYNOS SoC series JPEG codec
 Required properties:
 
 - compatible	: should be one of:
-		  "samsung,s5pv210-jpeg", "samsung,exynos4210-jpeg";
+		  "samsung,s5pv210-jpeg", "samsung,exynos4210-jpeg",
+		  "samsung,exynos3250-jpeg";
 - reg		: address and length of the JPEG codec IP register set;
 - interrupts	: specifies the JPEG codec IP interrupt;
-- clocks	: should contain the JPEG codec IP gate clock specifier, from the
+- clocks	: should contain the JPEG codec IP gate clock specifier and
+		  for the Exynos3250 SoC additionally the SCLK_JPEG entry; from the
 		  common clock bindings;
-- clock-names	: should contain "jpeg" entry.
+- clock-names	: should contain "jpeg" entry and additionally "sclk-jpeg" entry
+		  for Exynos3250 SoC
-- 
1.7.9.5

Re: [PATCH v2 8/9] Documentation: devicetree: Document sclk-jpeg clock for exynos3250 SoC

[Mark Rutland]

On Fri, Jul 11, 2014 at 04:19:49PM +0100, Jacek Anaszewski wrote:
> JPEG IP on Exynos3250 SoC requires enabling two clock
> gates for its operation. This patch documents this
> requirement.
> 
> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Pawel Moll <pawel.moll@arm.com>
> Cc: Mark Rutland <mark.rutland@arm.com>
> Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
> Cc: Kumar Gala <galak@codeaurora.org>
> Cc: devicetree@vger.kernel.org
> ---
>  .../bindings/media/exynos-jpeg-codec.txt           |    9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt b/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt
> index 937b755..3142745 100644
> --- a/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt
> +++ b/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt
> @@ -3,9 +3,12 @@ Samsung S5P/EXYNOS SoC series JPEG codec
>  Required properties:
>  
>  - compatible	: should be one of:
> -		  "samsung,s5pv210-jpeg", "samsung,exynos4210-jpeg";
> +		  "samsung,s5pv210-jpeg", "samsung,exynos4210-jpeg",
> +		  "samsung,exynos3250-jpeg";
>  - reg		: address and length of the JPEG codec IP register set;
>  - interrupts	: specifies the JPEG codec IP interrupt;
> -- clocks	: should contain the JPEG codec IP gate clock specifier, from the
> +- clocks	: should contain the JPEG codec IP gate clock specifier and
> +		  for the Exynos3250 SoC additionally the SCLK_JPEG entry; from the
>  		  common clock bindings;
> -- clock-names	: should contain "jpeg" entry.
> +- clock-names	: should contain "jpeg" entry and additionally "sclk-jpeg" entry
> +		  for Exynos3250 SoC

Please turn this into a list for easier reading, e.g.

- clock-names: should contain:
  * "jpeg" for the gate clock.
  * "sclk-jpeg" for the SCLK_JPEG clock (only for Exynos3250).

You could also define clocks in terms of clock-names to avoid
redundancy.

The SCLK_JPEG name sounds like a global name for the clock. Is there a
name for the input line on the JPEG block this is plugged into?

Thanks,
Mark.

Re: [PATCH v2 8/9] Documentation: devicetree: Document sclk-jpeg clock for exynos3250 SoC

[Sylwester Nawrocki]

On 14/07/14 11:56, Mark Rutland wrote:
>> diff --git a/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt b/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt
>> > index 937b755..3142745 100644
>> > --- a/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt
>> > +++ b/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt
>> > @@ -3,9 +3,12 @@ Samsung S5P/EXYNOS SoC series JPEG codec
>> >  Required properties:
>> >  
>> >  - compatible	: should be one of:
>> > -		  "samsung,s5pv210-jpeg", "samsung,exynos4210-jpeg";
>> > +		  "samsung,s5pv210-jpeg", "samsung,exynos4210-jpeg",
>> > +		  "samsung,exynos3250-jpeg";
>> >  - reg		: address and length of the JPEG codec IP register set;
>> >  - interrupts	: specifies the JPEG codec IP interrupt;
>> > -- clocks	: should contain the JPEG codec IP gate clock specifier, from the
>> > +- clocks	: should contain the JPEG codec IP gate clock specifier and
>> > +		  for the Exynos3250 SoC additionally the SCLK_JPEG entry; from the
>> >  		  common clock bindings;
>> > -- clock-names	: should contain "jpeg" entry.
>> > +- clock-names	: should contain "jpeg" entry and additionally "sclk-jpeg" entry
>> > +		  for Exynos3250 SoC
>
> Please turn this into a list for easier reading, e.g.
> 
> - clock-names: should contain:
>   * "jpeg" for the gate clock.
>   * "sclk-jpeg" for the SCLK_JPEG clock (only for Exynos3250).
> 
> You could also define clocks in terms of clock-names to avoid
> redundancy.
> 
> The SCLK_JPEG name sounds like a global name for the clock. Is there a
> name for the input line on the JPEG block this is plugged into?

There is unfortunately no such name for SCLK_JPEG clock in the IP's block
documentation. For most of the multimedia IPs clocks are documented
only in the clock controller chapter, hence the names may appear global.
Probably "gate", "sclk" would be good names, rather than "<IP_NAME>",
"<IP_NAME>-sclk". But people kept using the latter convention and now
it's spread all over and it's hard to change it.
Since now we can't rename "jpeg" and other IPs I'd assume it's best
to stay with "jpeg", "sclk-jpeg".

--
Regards,
Sylwester

Re: [PATCH v2 8/9] Documentation: devicetree: Document sclk-jpeg clock for exynos3250 SoC

[Arnd Bergmann]

On Tuesday 22 July 2014 13:42:00 Sylwester Nawrocki wrote:
> On 14/07/14 11:56, Mark Rutland wrote:
> >> diff --git a/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt b/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt
> >> > index 937b755..3142745 100644
> >> > --- a/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt
> >> > +++ b/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt
> >> > @@ -3,9 +3,12 @@ Samsung S5P/EXYNOS SoC series JPEG codec
> >> >  Required properties:
> >> >  
> >> >  - compatible      : should be one of:
> >> > -            "samsung,s5pv210-jpeg", "samsung,exynos4210-jpeg";
> >> > +            "samsung,s5pv210-jpeg", "samsung,exynos4210-jpeg",
> >> > +            "samsung,exynos3250-jpeg";
> >> >  - reg             : address and length of the JPEG codec IP register set;
> >> >  - interrupts      : specifies the JPEG codec IP interrupt;
> >> > -- clocks  : should contain the JPEG codec IP gate clock specifier, from the
> >> > +- clocks  : should contain the JPEG codec IP gate clock specifier and
> >> > +            for the Exynos3250 SoC additionally the SCLK_JPEG entry; from the
> >> >              common clock bindings;
> >> > -- clock-names     : should contain "jpeg" entry.
> >> > +- clock-names     : should contain "jpeg" entry and additionally "sclk-jpeg" entry
> >> > +            for Exynos3250 SoC
> >
> > Please turn this into a list for easier reading, e.g.
> > 
> > - clock-names: should contain:
> >   * "jpeg" for the gate clock.
> >   * "sclk-jpeg" for the SCLK_JPEG clock (only for Exynos3250).
> > 
> > You could also define clocks in terms of clock-names to avoid
> > redundancy.
> > 
> > The SCLK_JPEG name sounds like a global name for the clock. Is there a
> > name for the input line on the JPEG block this is plugged into?
> 
> There is unfortunately no such name for SCLK_JPEG clock in the IP's block
> documentation. For most of the multimedia IPs clocks are documented
> only in the clock controller chapter, hence the names may appear global.
> Probably "gate", "sclk" would be good names, rather than "<IP_NAME>",
> "<IP_NAME>-sclk". But people kept using the latter convention and now
> it's spread all over and it's hard to change it.
> Since now we can't rename "jpeg" and other IPs I'd assume it's best
> to stay with "jpeg", "sclk-jpeg".

We just had the exact same discussion about the addition of the sclk for
the adc in exynos3250 and ended up calling it just "sclk" instead of "sclk-adc"
there. I think it would be best to do the same here and use "sclk" instead
of "sclk-jpeg".

	Arnd

Re: [PATCH v2 8/9] Documentation: devicetree: Document sclk-jpeg clock for exynos3250 SoC

[Sylwester Nawrocki]

On 22/07/14 13:48, Arnd Bergmann wrote:
>>>>> -- clocks  : should contain the JPEG codec IP gate clock specifier, from the
>>>>> > >> > +- clocks  : should contain the JPEG codec IP gate clock specifier and
>>>>> > >> > +            for the Exynos3250 SoC additionally the SCLK_JPEG entry; from the
>>>>> > >> >              common clock bindings;
>>>>> > >> > -- clock-names     : should contain "jpeg" entry.
>>>>> > >> > +- clock-names     : should contain "jpeg" entry and additionally "sclk-jpeg" entry
>>>>> > >> > +            for Exynos3250 SoC
>>> > >
>>> > > Please turn this into a list for easier reading, e.g.
>>> > > 
>>> > > - clock-names: should contain:
>>> > >   * "jpeg" for the gate clock.
>>> > >   * "sclk-jpeg" for the SCLK_JPEG clock (only for Exynos3250).
>>> > > 
>>> > > You could also define clocks in terms of clock-names to avoid
>>> > > redundancy.
>>> > > 
>>> > > The SCLK_JPEG name sounds like a global name for the clock. Is there a
>>> > > name for the input line on the JPEG block this is plugged into?
>> > 
>> > There is unfortunately no such name for SCLK_JPEG clock in the IP's block
>> > documentation. For most of the multimedia IPs clocks are documented
>> > only in the clock controller chapter, hence the names may appear global.
>> > Probably "gate", "sclk" would be good names, rather than "<IP_NAME>",
>> > "<IP_NAME>-sclk". But people kept using the latter convention and now
>> > it's spread all over and it's hard to change it.
>> > Since now we can't rename "jpeg" and other IPs I'd assume it's best
>> > to stay with "jpeg", "sclk-jpeg".
>
> We just had the exact same discussion about the addition of the sclk for
> the adc in exynos3250 and ended up calling it just "sclk" instead of "sclk-adc"
> there. I think it would be best to do the same here and use "sclk" instead
> of "sclk-jpeg".

All right, then I would rephrase it to:

- clock-names   : should contain:
  		   - "jpeg" for the common gate clock,
		   - "sclk" for the special clock (only for Exynos3250).
- clocks	: should contain the clock specifier and clock ID list
  		  matching entries in the clock-names property, according
		  to the common clock bindings.

I went through documentation of these clocks in various SoCs' datasheets:
exynos4210, exynos4212/4412, exynos3250, exynos5250 and I think for all
SoCs the "jpeg" clock can be referred as "gating all clocks for the IP".
That means there is a single bit in a CMU register masking all the clocks
for the IP, I suppose this includes the control bus (APB) clock and the
IP functional ("special") clock.

It looks like e.g. exynos4412 also has the SCLK clock, after muxes and
a divider, so rate can be configured for this clock.  However there is
no separate gate for SCLK as in case of exynos3250. Thus there is no
need to to enable/disable the second clock on anything except exynos3250
currently.

I think ideally sclk should also be defined for SoCs like exynos4x12,
exynos5250, even if now drivers are not touching sclk. All in all the
IP functional clock frequency should be normally set to some known value,
now we rely on the default divider value which results in divider
ratio = 1.
It would break backward compatibility though if we now made sclk
mandatory. I'm inclined to also specify sclk for exynos4x12, just
not sure if it should be optional or mandatory.

-- 
Regards,
Sylwester

Re: [PATCH v2 8/9] Documentation: devicetree: Document sclk-jpeg clock for exynos3250 SoC

[Arnd Bergmann]

On Tuesday 22 July 2014 16:18:25 Sylwester Nawrocki wrote:
> 
> All right, then I would rephrase it to:
> 
> - clock-names   : should contain:
>                    - "jpeg" for the common gate clock,
>                    - "sclk" for the special clock (only for Exynos3250).
> - clocks        : should contain the clock specifier and clock ID list
>                   matching entries in the clock-names property, according
>                   to the common clock bindings.
> 
> I went through documentation of these clocks in various SoCs' datasheets:
> exynos4210, exynos4212/4412, exynos3250, exynos5250 and I think for all
> SoCs the "jpeg" clock can be referred as "gating all clocks for the IP".
> That means there is a single bit in a CMU register masking all the clocks
> for the IP, I suppose this includes the control bus (APB) clock and the
> IP functional ("special") clock.
> 
> It looks like e.g. exynos4412 also has the SCLK clock, after muxes and
> a divider, so rate can be configured for this clock.  However there is
> no separate gate for SCLK as in case of exynos3250. Thus there is no
> need to to enable/disable the second clock on anything except exynos3250
> currently.
> 
> I think ideally sclk should also be defined for SoCs like exynos4x12,
> exynos5250, even if now drivers are not touching sclk. All in all the
> IP functional clock frequency should be normally set to some known value,
> now we rely on the default divider value which results in divider
> ratio = 1.
> It would break backward compatibility though if we now made sclk
> mandatory. I'm inclined to also specify sclk for exynos4x12, just
> not sure if it should be optional or mandatory.

I'd vote for listing it as an optional clock independent of the compatible
string and changing the driver to just use it when it's provided.

	Arnd

Re: [PATCH v2 8/9] Documentation: devicetree: Document sclk-jpeg clock for exynos3250 SoC

[Sylwester Nawrocki]

On 22/07/14 16:44, Arnd Bergmann wrote:
> I'd vote for listing it as an optional clock independent of the compatible
> string and changing the driver to just use it when it's provided.

That sounds good to me, thanks for the suggestion.

-- 
Regards,
Sylwester

[PATCH v2 9/9] ARM: dts: exynos3250: add JPEG codec device node

[Jacek Anaszewski]

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
---
 arch/arm/boot/dts/exynos3250.dtsi |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm/boot/dts/exynos3250.dtsi b/arch/arm/boot/dts/exynos3250.dtsi
index 3e678fa..2f7f923 100644
--- a/arch/arm/boot/dts/exynos3250.dtsi
+++ b/arch/arm/boot/dts/exynos3250.dtsi
@@ -206,6 +206,15 @@
 			interrupts = <0 240 0>;
 		};
 
+		jpeg-codec@11830000 {
+			compatible = "samsung,exynos3250-jpeg";
+			reg = <0x11830000 0x1000>;
+			interrupts = <0 171 0>;
+			clocks = <&cmu CLK_JPEG>, <&cmu CLK_SCLK_JPEG>;
+			clock-names = "jpeg", "sclk-jpeg";
+			samsung,power-domain = <&pd_cam>;
+		};
+
 		mshc_0: mshc@12510000 {
 			compatible = "samsung,exynos5250-dw-mshc";
 			reg = <0x12510000 0x1000>;
-- 
1.7.9.5

Re: [PATCH v2 0/9] Add support for Exynos3250 SoC to the s5p-jpeg driver

[Sylwester Nawrocki]

Hi Jacek,

On 11/07/14 17:19, Jacek Anaszewski wrote:
> 
> Jacek Anaszewski (9):
>   s5p-jpeg: Add support for Exynos3250 SoC
>   s5p-jpeg: return error immediately after get_byte fails
>   s5p-jpeg: Adjust jpeg_bound_align_image to Exynos3250 needs
>   s5p-jpeg: fix g_selection op
>   s5p-jpeg: Assure proper crop rectangle initialization
>   s5p-jpeg: Prevent erroneous downscaling for Exynos3250 SoC
>   s5p-jpeg: add chroma subsampling adjustment for Exynos3250
>   Documentation: devicetree: Document sclk-jpeg clock for exynos3250
>     SoC
>   ARM: dts: exynos3250: add JPEG codec device node

I've applied all patches from this series except the last one
into my tree.

-- 
Thanks,
Sylwester