[PATCH 08/12] media: fimc-is: constify fimc_formats array

[Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>]

Pointers to elements of the static array "fimc_formats" with "struct
fimc_fmt" are passed all around to various calls, but all of them do not
modify pointed data.  Constify the pointers everywhere which at the end
allows to make static array "fimc_formats" const itself.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 .../samsung/exynos4-is/fimc-capture.c         | 26 +++++++++----------
 .../platform/samsung/exynos4-is/fimc-core.c   | 11 ++++----
 .../platform/samsung/exynos4-is/fimc-core.h   |  9 ++++---
 .../platform/samsung/exynos4-is/fimc-m2m.c    |  7 ++---
 4 files changed, 28 insertions(+), 25 deletions(-)

diff --git a/drivers/media/platform/samsung/exynos4-is/fimc-capture.c b/drivers/media/platform/samsung/exynos4-is/fimc-capture.c
index dde36e5be0c7..a3a677a3065f 100644
--- a/drivers/media/platform/samsung/exynos4-is/fimc-capture.c
+++ b/drivers/media/platform/samsung/exynos4-is/fimc-capture.c
@@ -559,9 +559,9 @@ static const struct v4l2_file_operations fimc_capture_fops = {
  * Format and crop negotiation helpers
  */
 
-static struct fimc_fmt *fimc_capture_try_format(struct fimc_ctx *ctx,
-						u32 *width, u32 *height,
-						u32 *code, u32 *fourcc, int pad)
+static const struct fimc_fmt *fimc_capture_try_format(struct fimc_ctx *ctx,
+						      u32 *width, u32 *height,
+						      u32 *code, u32 *fourcc, int pad)
 {
 	bool rotation = ctx->rotation == 90 || ctx->rotation == 270;
 	struct fimc_dev *fimc = ctx->fimc_dev;
@@ -569,8 +569,8 @@ static struct fimc_fmt *fimc_capture_try_format(struct fimc_ctx *ctx,
 	const struct fimc_pix_limit *pl = var->pix_limit;
 	struct fimc_frame *dst = &ctx->d_frame;
 	u32 depth, min_w, max_w, min_h, align_h = 3;
+	const struct fimc_fmt *ffmt;
 	u32 mask = FMT_FLAGS_CAM;
-	struct fimc_fmt *ffmt;
 
 	/* Conversion from/to JPEG or User Defined format is not supported */
 	if (code && ctx->s_frame.fmt && pad == FIMC_SD_PAD_SOURCE &&
@@ -757,7 +757,7 @@ static struct media_entity *fimc_pipeline_get_head(struct media_entity *me)
  */
 static int fimc_pipeline_try_format(struct fimc_ctx *ctx,
 				    struct v4l2_mbus_framefmt *tfmt,
-				    struct fimc_fmt **fmt_id,
+				    const struct fimc_fmt **fmt_id,
 				    bool set)
 {
 	struct fimc_dev *fimc = ctx->fimc_dev;
@@ -768,8 +768,8 @@ static int fimc_pipeline_try_format(struct fimc_ctx *ctx,
 		       : V4L2_SUBDEV_FORMAT_TRY,
 	};
 	struct v4l2_mbus_framefmt *mf = &sfmt.format;
+	const struct fimc_fmt *ffmt;
 	struct media_entity *me;
-	struct fimc_fmt *ffmt;
 	struct media_pad *pad;
 	int ret, i = 1;
 	u32 fcc;
@@ -903,8 +903,8 @@ static int fimc_cap_g_fmt_mplane(struct file *file, void *fh,
  */
 static int __video_try_or_set_format(struct fimc_dev *fimc,
 				     struct v4l2_format *f, bool try,
-				     struct fimc_fmt **inp_fmt,
-				     struct fimc_fmt **out_fmt)
+				     const struct fimc_fmt **inp_fmt,
+				     const struct fimc_fmt **out_fmt)
 {
 	struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
 	struct fimc_vid_cap *vc = &fimc->vid_cap;
@@ -986,7 +986,7 @@ static int fimc_cap_try_fmt_mplane(struct file *file, void *fh,
 				   struct v4l2_format *f)
 {
 	struct fimc_dev *fimc = video_drvdata(file);
-	struct fimc_fmt *out_fmt = NULL, *inp_fmt = NULL;
+	const struct fimc_fmt *out_fmt = NULL, *inp_fmt = NULL;
 
 	return __video_try_or_set_format(fimc, f, true, &inp_fmt, &out_fmt);
 }
@@ -1012,7 +1012,7 @@ static int __fimc_capture_set_format(struct fimc_dev *fimc,
 	struct fimc_ctx *ctx = vc->ctx;
 	struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
 	struct fimc_frame *ff = &ctx->d_frame;
-	struct fimc_fmt *inp_fmt = NULL;
+	const struct fimc_fmt *inp_fmt = NULL;
 	int ret, i;
 
 	if (vb2_is_busy(&fimc->vid_cap.vbq))
@@ -1519,7 +1519,7 @@ static int fimc_subdev_set_fmt(struct v4l2_subdev *sd,
 	struct fimc_vid_cap *vc = &fimc->vid_cap;
 	struct fimc_ctx *ctx = vc->ctx;
 	struct fimc_frame *ff;
-	struct fimc_fmt *ffmt;
+	const struct fimc_fmt *ffmt;
 
 	dbg("pad%d: code: 0x%x, %dx%d",
 	    fmt->pad, mf->code, mf->width, mf->height);
@@ -1715,9 +1715,9 @@ static int fimc_register_capture_device(struct fimc_dev *fimc,
 {
 	struct video_device *vfd = &fimc->vid_cap.ve.vdev;
 	struct vb2_queue *q = &fimc->vid_cap.vbq;
-	struct fimc_ctx *ctx;
 	struct fimc_vid_cap *vid_cap;
-	struct fimc_fmt *fmt;
+	const struct fimc_fmt *fmt;
+	struct fimc_ctx *ctx;
 	int ret = -ENOMEM;
 
 	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
diff --git a/drivers/media/platform/samsung/exynos4-is/fimc-core.c b/drivers/media/platform/samsung/exynos4-is/fimc-core.c
index 13b04fda8716..37f4952c7a9b 100644
--- a/drivers/media/platform/samsung/exynos4-is/fimc-core.c
+++ b/drivers/media/platform/samsung/exynos4-is/fimc-core.c
@@ -33,7 +33,7 @@ static const char *fimc_clocks[MAX_FIMC_CLOCKS] = {
 	"sclk_fimc", "fimc"
 };
 
-static struct fimc_fmt fimc_formats[] = {
+static const struct fimc_fmt fimc_formats[] = {
 	{
 		.fourcc		= V4L2_PIX_FMT_RGB565,
 		.depth		= { 16 },
@@ -180,7 +180,7 @@ static struct fimc_fmt fimc_formats[] = {
 	},
 };
 
-struct fimc_fmt *fimc_get_format(unsigned int index)
+const struct fimc_fmt *fimc_get_format(unsigned int index)
 {
 	if (index >= ARRAY_SIZE(fimc_formats))
 		return NULL;
@@ -752,10 +752,11 @@ void fimc_adjust_mplane_format(const struct fimc_fmt *fmt, u32 width, u32 height
  * @mask: the color flags to match
  * @index: offset in the fimc_formats array, ignored if negative
  */
-struct fimc_fmt *fimc_find_format(const u32 *pixelformat, const u32 *mbus_code,
-				  unsigned int mask, int index)
+const struct fimc_fmt *fimc_find_format(const u32 *pixelformat,
+					const u32 *mbus_code,
+					unsigned int mask, int index)
 {
-	struct fimc_fmt *fmt, *def_fmt = NULL;
+	const struct fimc_fmt *fmt, *def_fmt = NULL;
 	unsigned int i;
 	int id = 0;
 
diff --git a/drivers/media/platform/samsung/exynos4-is/fimc-core.h b/drivers/media/platform/samsung/exynos4-is/fimc-core.h
index 261c9aac2f7f..63385152a2ff 100644
--- a/drivers/media/platform/samsung/exynos4-is/fimc-core.h
+++ b/drivers/media/platform/samsung/exynos4-is/fimc-core.h
@@ -257,7 +257,7 @@ struct fimc_frame {
 	unsigned int		bytesperline[VIDEO_MAX_PLANES];
 	struct fimc_addr	addr;
 	struct fimc_dma_offset	dma_offset;
-	struct fimc_fmt		*fmt;
+	const struct fimc_fmt	*fmt;
 	u8			alpha;
 };
 
@@ -617,9 +617,10 @@ void fimc_alpha_ctrl_update(struct fimc_ctx *ctx);
 void __fimc_get_format(const struct fimc_frame *frame, struct v4l2_format *f);
 void fimc_adjust_mplane_format(const struct fimc_fmt *fmt, u32 width, u32 height,
 			       struct v4l2_pix_format_mplane *pix);
-struct fimc_fmt *fimc_find_format(const u32 *pixelformat, const u32 *mbus_code,
-				  unsigned int mask, int index);
-struct fimc_fmt *fimc_get_format(unsigned int index);
+const struct fimc_fmt *fimc_find_format(const u32 *pixelformat,
+					const u32 *mbus_code,
+					unsigned int mask, int index);
+const struct fimc_fmt *fimc_get_format(unsigned int index);
 
 int fimc_check_scaler_ratio(struct fimc_ctx *ctx, int sw, int sh,
 			    int dw, int dh, int rotation);
diff --git a/drivers/media/platform/samsung/exynos4-is/fimc-m2m.c b/drivers/media/platform/samsung/exynos4-is/fimc-m2m.c
index 1918390a2469..e9023f64cfba 100644
--- a/drivers/media/platform/samsung/exynos4-is/fimc-m2m.c
+++ b/drivers/media/platform/samsung/exynos4-is/fimc-m2m.c
@@ -314,7 +314,8 @@ static int fimc_m2m_try_fmt_mplane(struct file *file, void *fh,
 	return fimc_try_fmt_mplane(ctx, f);
 }
 
-static void __set_frame_format(struct fimc_frame *frame, struct fimc_fmt *fmt,
+static void __set_frame_format(struct fimc_frame *frame,
+			       const struct fimc_fmt *fmt,
 			       struct v4l2_pix_format_mplane *pixm)
 {
 	int i;
@@ -340,7 +341,7 @@ static int fimc_m2m_s_fmt_mplane(struct file *file, void *fh,
 {
 	struct fimc_ctx *ctx = fh_to_ctx(fh);
 	struct fimc_dev *fimc = ctx->fimc_dev;
-	struct fimc_fmt *fmt;
+	const struct fimc_fmt *fmt;
 	struct vb2_queue *vq;
 	struct fimc_frame *frame;
 	int ret;
@@ -588,7 +589,7 @@ static int fimc_m2m_set_default_format(struct fimc_ctx *ctx)
 			.sizeimage = 800 * 4 * 600,
 		},
 	};
-	struct fimc_fmt *fmt;
+	const struct fimc_fmt *fmt;
 
 	fmt = fimc_find_format(&pixm.pixelformat, NULL, FMT_FLAGS_M2M, 0);
 	if (!fmt)
-- 
2.34.1