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From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: linux-media@vger.kernel.org
Cc: Steve Longerbeam <slongerbeam@gmail.com>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Rui Miguel Silva <rmfrfs@gmail.com>
Subject: [PATCH 6/8] media: imx: utils: Make imx_media_pixfmt handle variable number of codes
Date: Tue, 10 Mar 2020 18:18:43 +0200	[thread overview]
Message-ID: <20200310161845.1588-7-laurent.pinchart@ideasonboard.com> (raw)
In-Reply-To: <20200310161845.1588-1-laurent.pinchart@ideasonboard.com>

The imx_media_pixfmt structures includes a codes member that stores
media bus codes as a fixed array of 4 integers. The functions dealing
with the imx_media_pixfmt structures assume that the array of codes is
terminated by a 0 elements. This mechanism is fragile, as demonstrated
by several instances of the structure contained 4 non-zero codes.

Fix this by turning the array into a pointer, and providing an
IMX_BUS_FMTS macro to initialize the codes member with a guaranteed 0
element at the end.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/staging/media/imx/imx-media-utils.c | 78 ++++++++++++---------
 drivers/staging/media/imx/imx-media.h       |  2 +-
 2 files changed, 46 insertions(+), 34 deletions(-)

diff --git a/drivers/staging/media/imx/imx-media-utils.c b/drivers/staging/media/imx/imx-media-utils.c
index 5036a856be95..291d0b781278 100644
--- a/drivers/staging/media/imx/imx-media-utils.c
+++ b/drivers/staging/media/imx/imx-media-utils.c
@@ -14,21 +14,27 @@
  * mbus codes) must all fall at the end of the table.
  */
 
+#define IMX_BUS_FMTS(fmts...)	\
+	(const u32[]) {		\
+		fmts,		\
+		0		\
+	}
+
 static const struct imx_media_pixfmt yuv_formats[] = {
 	{
 		.fourcc	= V4L2_PIX_FMT_UYVY,
-		.codes  = {
+		.codes  = IMX_BUS_FMTS(
 			MEDIA_BUS_FMT_UYVY8_2X8,
 			MEDIA_BUS_FMT_UYVY8_1X16
-		},
+		),
 		.cs     = IPUV3_COLORSPACE_YUV,
 		.bpp    = 16,
 	}, {
 		.fourcc	= V4L2_PIX_FMT_YUYV,
-		.codes  = {
+		.codes  = IMX_BUS_FMTS(
 			MEDIA_BUS_FMT_YUYV8_2X8,
 			MEDIA_BUS_FMT_YUYV8_1X16
-		},
+		),
 		.cs     = IPUV3_COLORSPACE_YUV,
 		.bpp    = 16,
 	},
@@ -71,21 +77,21 @@ static const struct imx_media_pixfmt yuv_formats[] = {
 static const struct imx_media_pixfmt rgb_formats[] = {
 	{
 		.fourcc	= V4L2_PIX_FMT_RGB565,
-		.codes  = {MEDIA_BUS_FMT_RGB565_2X8_LE},
+		.codes  = IMX_BUS_FMTS(MEDIA_BUS_FMT_RGB565_2X8_LE),
 		.cs     = IPUV3_COLORSPACE_RGB,
 		.bpp    = 16,
 		.cycles = 2,
 	}, {
 		.fourcc	= V4L2_PIX_FMT_RGB24,
-		.codes  = {
+		.codes  = IMX_BUS_FMTS(
 			MEDIA_BUS_FMT_RGB888_1X24,
 			MEDIA_BUS_FMT_RGB888_2X12_LE
-		},
+		),
 		.cs     = IPUV3_COLORSPACE_RGB,
 		.bpp    = 24,
 	}, {
 		.fourcc	= V4L2_PIX_FMT_XRGB32,
-		.codes  = {MEDIA_BUS_FMT_ARGB8888_1X32},
+		.codes  = IMX_BUS_FMTS(MEDIA_BUS_FMT_ARGB8888_1X32),
 		.cs     = IPUV3_COLORSPACE_RGB,
 		.bpp    = 32,
 		.ipufmt = true,
@@ -93,91 +99,91 @@ static const struct imx_media_pixfmt rgb_formats[] = {
 	/*** raw bayer and grayscale formats start here ***/
 	{
 		.fourcc = V4L2_PIX_FMT_SBGGR8,
-		.codes  = {MEDIA_BUS_FMT_SBGGR8_1X8},
+		.codes  = IMX_BUS_FMTS(MEDIA_BUS_FMT_SBGGR8_1X8),
 		.cs     = IPUV3_COLORSPACE_RGB,
 		.bpp    = 8,
 		.bayer  = true,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SGBRG8,
-		.codes  = {MEDIA_BUS_FMT_SGBRG8_1X8},
+		.codes  = IMX_BUS_FMTS(MEDIA_BUS_FMT_SGBRG8_1X8),
 		.cs     = IPUV3_COLORSPACE_RGB,
 		.bpp    = 8,
 		.bayer  = true,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SGRBG8,
-		.codes  = {MEDIA_BUS_FMT_SGRBG8_1X8},
+		.codes  = IMX_BUS_FMTS(MEDIA_BUS_FMT_SGRBG8_1X8),
 		.cs     = IPUV3_COLORSPACE_RGB,
 		.bpp    = 8,
 		.bayer  = true,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SRGGB8,
-		.codes  = {MEDIA_BUS_FMT_SRGGB8_1X8},
+		.codes  = IMX_BUS_FMTS(MEDIA_BUS_FMT_SRGGB8_1X8),
 		.cs     = IPUV3_COLORSPACE_RGB,
 		.bpp    = 8,
 		.bayer  = true,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SBGGR16,
-		.codes  = {
+		.codes  = IMX_BUS_FMTS(
 			MEDIA_BUS_FMT_SBGGR10_1X10,
 			MEDIA_BUS_FMT_SBGGR12_1X12,
 			MEDIA_BUS_FMT_SBGGR14_1X14,
 			MEDIA_BUS_FMT_SBGGR16_1X16
-		},
+		),
 		.cs     = IPUV3_COLORSPACE_RGB,
 		.bpp    = 16,
 		.bayer  = true,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SGBRG16,
-		.codes  = {
+		.codes  = IMX_BUS_FMTS(
 			MEDIA_BUS_FMT_SGBRG10_1X10,
 			MEDIA_BUS_FMT_SGBRG12_1X12,
 			MEDIA_BUS_FMT_SGBRG14_1X14,
-			MEDIA_BUS_FMT_SGBRG16_1X16,
-		},
+			MEDIA_BUS_FMT_SGBRG16_1X16
+		),
 		.cs     = IPUV3_COLORSPACE_RGB,
 		.bpp    = 16,
 		.bayer  = true,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SGRBG16,
-		.codes  = {
+		.codes  = IMX_BUS_FMTS(
 			MEDIA_BUS_FMT_SGRBG10_1X10,
 			MEDIA_BUS_FMT_SGRBG12_1X12,
 			MEDIA_BUS_FMT_SGRBG14_1X14,
-			MEDIA_BUS_FMT_SGRBG16_1X16,
-		},
+			MEDIA_BUS_FMT_SGRBG16_1X16
+		),
 		.cs     = IPUV3_COLORSPACE_RGB,
 		.bpp    = 16,
 		.bayer  = true,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SRGGB16,
-		.codes  = {
+		.codes  = IMX_BUS_FMTS(
 			MEDIA_BUS_FMT_SRGGB10_1X10,
 			MEDIA_BUS_FMT_SRGGB12_1X12,
 			MEDIA_BUS_FMT_SRGGB14_1X14,
-			MEDIA_BUS_FMT_SRGGB16_1X16,
-		},
+			MEDIA_BUS_FMT_SRGGB16_1X16
+		),
 		.cs     = IPUV3_COLORSPACE_RGB,
 		.bpp    = 16,
 		.bayer  = true,
 	}, {
 		.fourcc = V4L2_PIX_FMT_GREY,
-		.codes = {
+		.codes = IMX_BUS_FMTS(
 			MEDIA_BUS_FMT_Y8_1X8,
 			MEDIA_BUS_FMT_Y10_1X10,
-			MEDIA_BUS_FMT_Y12_1X12,
-		},
+			MEDIA_BUS_FMT_Y12_1X12
+		),
 		.cs     = IPUV3_COLORSPACE_RGB,
 		.bpp    = 8,
 		.bayer  = true,
 	}, {
 		.fourcc = V4L2_PIX_FMT_Y10,
-		.codes = {MEDIA_BUS_FMT_Y10_1X10},
+		.codes = IMX_BUS_FMTS(MEDIA_BUS_FMT_Y10_1X10),
 		.cs     = IPUV3_COLORSPACE_RGB,
 		.bpp    = 16,
 		.bayer  = true,
 	}, {
 		.fourcc = V4L2_PIX_FMT_Y12,
-		.codes = {MEDIA_BUS_FMT_Y12_1X12},
+		.codes = IMX_BUS_FMTS(MEDIA_BUS_FMT_Y12_1X12),
 		.cs     = IPUV3_COLORSPACE_RGB,
 		.bpp    = 16,
 		.bayer  = true,
@@ -223,14 +229,14 @@ struct imx_media_pixfmt *__find_format(u32 fourcc,
 	for (i = 0; i < array_size; i++) {
 		fmt = &array[i];
 
-		if ((!allow_non_mbus && !fmt->codes[0]) ||
+		if ((!allow_non_mbus && !fmt->codes) ||
 		    (!allow_bayer && fmt->bayer))
 			continue;
 
 		if (fourcc && fmt->fourcc == fourcc)
 			return fmt;
 
-		if (!code)
+		if (!code || !fmt->codes)
 			continue;
 
 		for (j = 0; fmt->codes[j]; j++) {
@@ -327,7 +333,7 @@ static int enum_format(u32 *fourcc, u32 *code, u32 index,
 	if (fourcc)
 		*fourcc = fmt->fourcc;
 	if (code)
-		*code = fmt->codes[0];
+		*code = fmt->codes ? fmt->codes[0] : 0;
 
 	return 0;
 }
@@ -365,13 +371,13 @@ EXPORT_SYMBOL_GPL(imx_media_enum_mbus_format);
 static const struct imx_media_pixfmt ipu_formats[] = {
 	{
 		.fourcc = V4L2_PIX_FMT_YUV32,
-		.codes  = {MEDIA_BUS_FMT_AYUV8_1X32},
+		.codes  = IMX_BUS_FMTS(MEDIA_BUS_FMT_AYUV8_1X32),
 		.cs     = IPUV3_COLORSPACE_YUV,
 		.bpp    = 32,
 		.ipufmt = true,
 	}, {
 		.fourcc	= V4L2_PIX_FMT_XRGB32,
-		.codes  = {MEDIA_BUS_FMT_ARGB8888_1X32},
+		.codes  = IMX_BUS_FMTS(MEDIA_BUS_FMT_ARGB8888_1X32),
 		.cs     = IPUV3_COLORSPACE_RGB,
 		.bpp    = 32,
 		.ipufmt = true,
@@ -395,6 +401,9 @@ imx_media_find_ipu_format(u32 code, enum codespace_sel cs_sel)
 		    (!accept_rgb && fmt->cs == IPUV3_COLORSPACE_RGB))
 			continue;
 
+		if (!fmt->codes)
+			continue;
+
 		for (j = 0; fmt->codes[j]; j++) {
 			if (code == fmt->codes[j])
 				return fmt;
@@ -418,6 +427,9 @@ int imx_media_enum_ipu_format(u32 *code, u32 index, enum codespace_sel cs_sel)
 		    (!accept_rgb && fmt->cs == IPUV3_COLORSPACE_RGB))
 			continue;
 
+		if (!fmt->codes)
+			continue;
+
 		if (index-- == 0) {
 			*code = fmt->codes[0];
 			return 0;
diff --git a/drivers/staging/media/imx/imx-media.h b/drivers/staging/media/imx/imx-media.h
index dc6f8fe7c66c..9cedc27a6b4a 100644
--- a/drivers/staging/media/imx/imx-media.h
+++ b/drivers/staging/media/imx/imx-media.h
@@ -69,7 +69,7 @@ enum {
 
 struct imx_media_pixfmt {
 	u32     fourcc;
-	u32     codes[4];
+	const u32 *codes;
 	int     bpp;     /* total bpp */
 	/* cycles per pixel for generic (bayer) formats for the parallel bus */
 	int	cycles;
-- 
Regards,

Laurent Pinchart


  parent reply	other threads:[~2020-03-10 16:19 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-10 16:18 [PATCH 0/8] media: imx: Miscalleanous format-related cleanups Laurent Pinchart
2020-03-10 16:18 ` [PATCH 1/8] media: imx: imx7-mipi-csis: Cleanup and fix subdev pad format handling Laurent Pinchart
2020-03-10 16:18 ` [PATCH 2/8] media: imx: imx7-mipi-csis: Centralize initialization of pad formats Laurent Pinchart
2020-03-10 16:18 ` [PATCH 3/8] media: imx: utils: Inline init_mbus_colorimetry() in its caller Laurent Pinchart
2020-03-10 16:18 ` [PATCH 4/8] media: imx: utils: Handle Bayer format lookup through a selection flag Laurent Pinchart
2020-03-10 16:18 ` [PATCH 5/8] media: imx: utils: Simplify IPU format lookup and enumeration Laurent Pinchart
2020-03-10 16:18 ` Laurent Pinchart [this message]
2020-03-10 16:18 ` [PATCH 7/8] media: imx: utils: Remove unneeded argument to (find|enum)_format() Laurent Pinchart
2020-03-10 16:18 ` [PATCH 8/8] media: imx: utils: Rename format lookup and enumeration functions Laurent Pinchart
2020-03-10 22:05 ` [PATCH 9/8] media: imx: utils: Constify mbus argument to imx_media_mbus_fmt_to_pix_fmt Laurent Pinchart
2020-03-11 14:35 ` [PATCH 0/8] media: imx: Miscalleanous format-related cleanups Rui Miguel Silva
2020-03-12  0:16 ` Steve Longerbeam
2020-03-12  0:47   ` Laurent Pinchart
2020-03-12  0:55     ` Steve Longerbeam
2020-03-14 22:30     ` Steve Longerbeam
2020-03-14 22:32       ` Laurent Pinchart
2020-03-14 22:33         ` Steve Longerbeam
2020-03-26 19:05         ` Steve Longerbeam
2020-03-26 19:53           ` Laurent Pinchart

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