| Message ID | 1415267829-4177-2-git-send-email-boris.brezillon@free-electrons.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Boris, Thank you for the update. On Thu, Nov 06, 2014 at 10:56:59AM +0100, Boris Brezillon wrote: > Rename mediabus formats and move the enum into a separate header file so > that it can be used by DRM/KMS subsystem without any reference to the V4L2 > subsystem. > > Old v4l2_mbus_pixelcode now points to media_bus_format. > > Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> > Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> > --- > include/uapi/linux/Kbuild | 1 + > include/uapi/linux/media-bus-format.h | 131 ++++++++++++++++++++++++++++++++++ > include/uapi/linux/v4l2-mediabus.h | 114 +---------------------------- > 3 files changed, 134 insertions(+), 112 deletions(-) > create mode 100644 include/uapi/linux/media-bus-format.h > > diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild > index b70237e..b2c23f8 100644 > --- a/include/uapi/linux/Kbuild > +++ b/include/uapi/linux/Kbuild > @@ -414,6 +414,7 @@ header-y += veth.h > header-y += vfio.h > header-y += vhost.h > header-y += videodev2.h > +header-y += media-bus-format.h Could you arrange this to the list alphabetically, please? > header-y += virtio_9p.h > header-y += virtio_balloon.h > header-y += virtio_blk.h > diff --git a/include/uapi/linux/media-bus-format.h b/include/uapi/linux/media-bus-format.h > new file mode 100644 > index 0000000..251a902 > --- /dev/null > +++ b/include/uapi/linux/media-bus-format.h > @@ -0,0 +1,131 @@ > +/* > + * Media Bus API header > + * > + * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de> > + * > + * 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 __LINUX_MEDIA_BUS_FORMAT_H > +#define __LINUX_MEDIA_BUS_FORMAT_H > + > +/* > + * These bus formats uniquely identify data formats on the data bus. Format 0 > + * is reserved, MEDIA_BUS_FMT_FIXED shall be used by host-client pairs, where > + * the data format is fixed. Additionally, "2X8" means that one pixel is > + * transferred in two 8-bit samples, "BE" or "LE" specify in which order those > + * samples are transferred over the bus: "LE" means that the least significant > + * bits are transferred first, "BE" means that the most significant bits are > + * transferred first, and "PADHI" and "PADLO" define which bits - low or high, > + * in the incomplete high byte, are filled with padding bits. > + * > + * The bus formats are grouped by type, bus_width, bits per component, samples > + * per pixel and order of subsamples. Numerical values are sorted using generic > + * numerical sort order (8 thus comes before 10). > + * > + * As their value can't change when a new bus format is inserted in the > + * enumeration, the bus formats are explicitly given a numerical value. The next > + * free values for each category are listed below, update them when inserting > + * new pixel codes. > + */ > + > +#define MEDIA_BUS_FMT_ENTRY(name, val) \ > + MEDIA_BUS_FMT_ ## name = val, \ > + V4L2_MBUS_FMT_ ## name = val > + > +enum media_bus_format { There's no really a need to keep the definitions inside the enum. It looks a little bit confusing to me. That made me realise something I missed yesterday. There's a difference: the enum in C++ is a different thing than in C, and the enum type isn't able to contain any other values than those defined in the enumeration. So what I propose is the following. Keep enum v4l2_mbus_pixelcode around, including the enum values. Define new values for MEDIA_BUS_* equivalents using preprocessor macros, as you've done below. Drop the definition of enum media_bus_format, and use u32 (or uint32_t) type for the variables. This way the enum stays intact for existing C++ applications, and new applications will have to use a 32-bit type. I'd like to get an ok from Hans to this as well. > + MEDIA_BUS_FMT_ENTRY(FIXED, 0x0001), > + > + /* RGB - next is 0x100e */ > + MEDIA_BUS_FMT_ENTRY(RGB444_2X8_PADHI_BE, 0x1001), > + MEDIA_BUS_FMT_ENTRY(RGB444_2X8_PADHI_LE, 0x1002), > + MEDIA_BUS_FMT_ENTRY(RGB555_2X8_PADHI_BE, 0x1003), > + MEDIA_BUS_FMT_ENTRY(RGB555_2X8_PADHI_LE, 0x1004), > + MEDIA_BUS_FMT_ENTRY(BGR565_2X8_BE, 0x1005), > + MEDIA_BUS_FMT_ENTRY(BGR565_2X8_LE, 0x1006), > + MEDIA_BUS_FMT_ENTRY(RGB565_2X8_BE, 0x1007), > + MEDIA_BUS_FMT_ENTRY(RGB565_2X8_LE, 0x1008), > + MEDIA_BUS_FMT_ENTRY(RGB666_1X18, 0x1009), > + MEDIA_BUS_FMT_ENTRY(RGB888_1X24, 0x100a), > + MEDIA_BUS_FMT_ENTRY(RGB888_2X12_BE, 0x100b), > + MEDIA_BUS_FMT_ENTRY(RGB888_2X12_LE, 0x100c), > + MEDIA_BUS_FMT_ENTRY(ARGB8888_1X32, 0x100d), > + > + /* YUV (including grey) - next is 0x2024 */ > + MEDIA_BUS_FMT_ENTRY(Y8_1X8, 0x2001), > + MEDIA_BUS_FMT_ENTRY(UV8_1X8, 0x2015), > + MEDIA_BUS_FMT_ENTRY(UYVY8_1_5X8, 0x2002), > + MEDIA_BUS_FMT_ENTRY(VYUY8_1_5X8, 0x2003), > + MEDIA_BUS_FMT_ENTRY(YUYV8_1_5X8, 0x2004), > + MEDIA_BUS_FMT_ENTRY(YVYU8_1_5X8, 0x2005), > + MEDIA_BUS_FMT_ENTRY(UYVY8_2X8, 0x2006), > + MEDIA_BUS_FMT_ENTRY(VYUY8_2X8, 0x2007), > + MEDIA_BUS_FMT_ENTRY(YUYV8_2X8, 0x2008), > + MEDIA_BUS_FMT_ENTRY(YVYU8_2X8, 0x2009), > + MEDIA_BUS_FMT_ENTRY(Y10_1X10, 0x200a), > + MEDIA_BUS_FMT_ENTRY(UYVY10_2X10, 0x2018), > + MEDIA_BUS_FMT_ENTRY(VYUY10_2X10, 0x2019), > + MEDIA_BUS_FMT_ENTRY(YUYV10_2X10, 0x200b), > + MEDIA_BUS_FMT_ENTRY(YVYU10_2X10, 0x200c), > + MEDIA_BUS_FMT_ENTRY(Y12_1X12, 0x2013), > + MEDIA_BUS_FMT_ENTRY(UYVY8_1X16, 0x200f), > + MEDIA_BUS_FMT_ENTRY(VYUY8_1X16, 0x2010), > + MEDIA_BUS_FMT_ENTRY(YUYV8_1X16, 0x2011), > + MEDIA_BUS_FMT_ENTRY(YVYU8_1X16, 0x2012), > + MEDIA_BUS_FMT_ENTRY(YDYUYDYV8_1X16, 0x2014), > + MEDIA_BUS_FMT_ENTRY(UYVY10_1X20, 0x201a), > + MEDIA_BUS_FMT_ENTRY(VYUY10_1X20, 0x201b), > + MEDIA_BUS_FMT_ENTRY(YUYV10_1X20, 0x200d), > + MEDIA_BUS_FMT_ENTRY(YVYU10_1X20, 0x200e), > + MEDIA_BUS_FMT_ENTRY(YUV10_1X30, 0x2016), > + MEDIA_BUS_FMT_ENTRY(AYUV8_1X32, 0x2017), > + MEDIA_BUS_FMT_ENTRY(UYVY12_2X12, 0x201c), > + MEDIA_BUS_FMT_ENTRY(VYUY12_2X12, 0x201d), > + MEDIA_BUS_FMT_ENTRY(YUYV12_2X12, 0x201e), > + MEDIA_BUS_FMT_ENTRY(YVYU12_2X12, 0x201f), > + MEDIA_BUS_FMT_ENTRY(UYVY12_1X24, 0x2020), > + MEDIA_BUS_FMT_ENTRY(VYUY12_1X24, 0x2021), > + MEDIA_BUS_FMT_ENTRY(YUYV12_1X24, 0x2022), > + MEDIA_BUS_FMT_ENTRY(YVYU12_1X24, 0x2023), > + > + /* Bayer - next is 0x3019 */ > + MEDIA_BUS_FMT_ENTRY(SBGGR8_1X8, 0x3001), > + MEDIA_BUS_FMT_ENTRY(SGBRG8_1X8, 0x3013), > + MEDIA_BUS_FMT_ENTRY(SGRBG8_1X8, 0x3002), > + MEDIA_BUS_FMT_ENTRY(SRGGB8_1X8, 0x3014), > + MEDIA_BUS_FMT_ENTRY(SBGGR10_ALAW8_1X8, 0x3015), > + MEDIA_BUS_FMT_ENTRY(SGBRG10_ALAW8_1X8, 0x3016), > + MEDIA_BUS_FMT_ENTRY(SGRBG10_ALAW8_1X8, 0x3017), > + MEDIA_BUS_FMT_ENTRY(SRGGB10_ALAW8_1X8, 0x3018), > + MEDIA_BUS_FMT_ENTRY(SBGGR10_DPCM8_1X8, 0x300b), > + MEDIA_BUS_FMT_ENTRY(SGBRG10_DPCM8_1X8, 0x300c), > + MEDIA_BUS_FMT_ENTRY(SGRBG10_DPCM8_1X8, 0x3009), > + MEDIA_BUS_FMT_ENTRY(SRGGB10_DPCM8_1X8, 0x300d), > + MEDIA_BUS_FMT_ENTRY(SBGGR10_2X8_PADHI_BE, 0x3003), > + MEDIA_BUS_FMT_ENTRY(SBGGR10_2X8_PADHI_LE, 0x3004), > + MEDIA_BUS_FMT_ENTRY(SBGGR10_2X8_PADLO_BE, 0x3005), > + MEDIA_BUS_FMT_ENTRY(SBGGR10_2X8_PADLO_LE, 0x3006), > + MEDIA_BUS_FMT_ENTRY(SBGGR10_1X10, 0x3007), > + MEDIA_BUS_FMT_ENTRY(SGBRG10_1X10, 0x300e), > + MEDIA_BUS_FMT_ENTRY(SGRBG10_1X10, 0x300a), > + MEDIA_BUS_FMT_ENTRY(SRGGB10_1X10, 0x300f), > + MEDIA_BUS_FMT_ENTRY(SBGGR12_1X12, 0x3008), > + MEDIA_BUS_FMT_ENTRY(SGBRG12_1X12, 0x3010), > + MEDIA_BUS_FMT_ENTRY(SGRBG12_1X12, 0x3011), > + MEDIA_BUS_FMT_ENTRY(SRGGB12_1X12, 0x3012), > + > + /* JPEG compressed formats - next is 0x4002 */ > + MEDIA_BUS_FMT_ENTRY(JPEG_1X8, 0x4001), > + > + /* Vendor specific formats - next is 0x5002 */ > + > + /* S5C73M3 sensor specific interleaved UYVY and JPEG */ > + MEDIA_BUS_FMT_ENTRY(S5C_UYVY_JPEG_1X8, 0x5001), > + > + /* HSV - next is 0x6002 */ > + MEDIA_BUS_FMT_ENTRY(AHSV8888_1X32, 0x6001), > +}; > + > +#endif /* __LINUX_MEDIA_BUS_FORMAT_H */ > diff --git a/include/uapi/linux/v4l2-mediabus.h b/include/uapi/linux/v4l2-mediabus.h > index 1445e85..d30526c 100644 > --- a/include/uapi/linux/v4l2-mediabus.h > +++ b/include/uapi/linux/v4l2-mediabus.h > @@ -13,119 +13,9 @@ > > #include <linux/types.h> > #include <linux/videodev2.h> > +#include <linux/media-bus-format.h> > > -/* > - * These pixel codes uniquely identify data formats on the media bus. Mostly > - * they correspond to similarly named V4L2_PIX_FMT_* formats, format 0 is > - * reserved, V4L2_MBUS_FMT_FIXED shall be used by host-client pairs, where the > - * data format is fixed. Additionally, "2X8" means that one pixel is transferred > - * in two 8-bit samples, "BE" or "LE" specify in which order those samples are > - * transferred over the bus: "LE" means that the least significant bits are > - * transferred first, "BE" means that the most significant bits are transferred > - * first, and "PADHI" and "PADLO" define which bits - low or high, in the > - * incomplete high byte, are filled with padding bits. > - * > - * The pixel codes are grouped by type, bus_width, bits per component, samples > - * per pixel and order of subsamples. Numerical values are sorted using generic > - * numerical sort order (8 thus comes before 10). > - * > - * As their value can't change when a new pixel code is inserted in the > - * enumeration, the pixel codes are explicitly given a numerical value. The next > - * free values for each category are listed below, update them when inserting > - * new pixel codes. > - */ > -enum v4l2_mbus_pixelcode { > - V4L2_MBUS_FMT_FIXED = 0x0001, > - > - /* RGB - next is 0x100e */ > - V4L2_MBUS_FMT_RGB444_2X8_PADHI_BE = 0x1001, > - V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE = 0x1002, > - V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE = 0x1003, > - V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE = 0x1004, > - V4L2_MBUS_FMT_BGR565_2X8_BE = 0x1005, > - V4L2_MBUS_FMT_BGR565_2X8_LE = 0x1006, > - V4L2_MBUS_FMT_RGB565_2X8_BE = 0x1007, > - V4L2_MBUS_FMT_RGB565_2X8_LE = 0x1008, > - V4L2_MBUS_FMT_RGB666_1X18 = 0x1009, > - V4L2_MBUS_FMT_RGB888_1X24 = 0x100a, > - V4L2_MBUS_FMT_RGB888_2X12_BE = 0x100b, > - V4L2_MBUS_FMT_RGB888_2X12_LE = 0x100c, > - V4L2_MBUS_FMT_ARGB8888_1X32 = 0x100d, > - > - /* YUV (including grey) - next is 0x2024 */ > - V4L2_MBUS_FMT_Y8_1X8 = 0x2001, > - V4L2_MBUS_FMT_UV8_1X8 = 0x2015, > - V4L2_MBUS_FMT_UYVY8_1_5X8 = 0x2002, > - V4L2_MBUS_FMT_VYUY8_1_5X8 = 0x2003, > - V4L2_MBUS_FMT_YUYV8_1_5X8 = 0x2004, > - V4L2_MBUS_FMT_YVYU8_1_5X8 = 0x2005, > - V4L2_MBUS_FMT_UYVY8_2X8 = 0x2006, > - V4L2_MBUS_FMT_VYUY8_2X8 = 0x2007, > - V4L2_MBUS_FMT_YUYV8_2X8 = 0x2008, > - V4L2_MBUS_FMT_YVYU8_2X8 = 0x2009, > - V4L2_MBUS_FMT_Y10_1X10 = 0x200a, > - V4L2_MBUS_FMT_UYVY10_2X10 = 0x2018, > - V4L2_MBUS_FMT_VYUY10_2X10 = 0x2019, > - V4L2_MBUS_FMT_YUYV10_2X10 = 0x200b, > - V4L2_MBUS_FMT_YVYU10_2X10 = 0x200c, > - V4L2_MBUS_FMT_Y12_1X12 = 0x2013, > - V4L2_MBUS_FMT_UYVY8_1X16 = 0x200f, > - V4L2_MBUS_FMT_VYUY8_1X16 = 0x2010, > - V4L2_MBUS_FMT_YUYV8_1X16 = 0x2011, > - V4L2_MBUS_FMT_YVYU8_1X16 = 0x2012, > - V4L2_MBUS_FMT_YDYUYDYV8_1X16 = 0x2014, > - V4L2_MBUS_FMT_UYVY10_1X20 = 0x201a, > - V4L2_MBUS_FMT_VYUY10_1X20 = 0x201b, > - V4L2_MBUS_FMT_YUYV10_1X20 = 0x200d, > - V4L2_MBUS_FMT_YVYU10_1X20 = 0x200e, > - V4L2_MBUS_FMT_YUV10_1X30 = 0x2016, > - V4L2_MBUS_FMT_AYUV8_1X32 = 0x2017, > - V4L2_MBUS_FMT_UYVY12_2X12 = 0x201c, > - V4L2_MBUS_FMT_VYUY12_2X12 = 0x201d, > - V4L2_MBUS_FMT_YUYV12_2X12 = 0x201e, > - V4L2_MBUS_FMT_YVYU12_2X12 = 0x201f, > - V4L2_MBUS_FMT_UYVY12_1X24 = 0x2020, > - V4L2_MBUS_FMT_VYUY12_1X24 = 0x2021, > - V4L2_MBUS_FMT_YUYV12_1X24 = 0x2022, > - V4L2_MBUS_FMT_YVYU12_1X24 = 0x2023, > - > - /* Bayer - next is 0x3019 */ > - V4L2_MBUS_FMT_SBGGR8_1X8 = 0x3001, > - V4L2_MBUS_FMT_SGBRG8_1X8 = 0x3013, > - V4L2_MBUS_FMT_SGRBG8_1X8 = 0x3002, > - V4L2_MBUS_FMT_SRGGB8_1X8 = 0x3014, > - V4L2_MBUS_FMT_SBGGR10_ALAW8_1X8 = 0x3015, > - V4L2_MBUS_FMT_SGBRG10_ALAW8_1X8 = 0x3016, > - V4L2_MBUS_FMT_SGRBG10_ALAW8_1X8 = 0x3017, > - V4L2_MBUS_FMT_SRGGB10_ALAW8_1X8 = 0x3018, > - V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8 = 0x300b, > - V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8 = 0x300c, > - V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8 = 0x3009, > - V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8 = 0x300d, > - V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE = 0x3003, > - V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE = 0x3004, > - V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE = 0x3005, > - V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE = 0x3006, > - V4L2_MBUS_FMT_SBGGR10_1X10 = 0x3007, > - V4L2_MBUS_FMT_SGBRG10_1X10 = 0x300e, > - V4L2_MBUS_FMT_SGRBG10_1X10 = 0x300a, > - V4L2_MBUS_FMT_SRGGB10_1X10 = 0x300f, > - V4L2_MBUS_FMT_SBGGR12_1X12 = 0x3008, > - V4L2_MBUS_FMT_SGBRG12_1X12 = 0x3010, > - V4L2_MBUS_FMT_SGRBG12_1X12 = 0x3011, > - V4L2_MBUS_FMT_SRGGB12_1X12 = 0x3012, > - > - /* JPEG compressed formats - next is 0x4002 */ > - V4L2_MBUS_FMT_JPEG_1X8 = 0x4001, > - > - /* Vendor specific formats - next is 0x5002 */ > - > - /* S5C73M3 sensor specific interleaved UYVY and JPEG */ > - V4L2_MBUS_FMT_S5C_UYVY_JPEG_1X8 = 0x5001, > - > - /* HSV - next is 0x6002 */ > - V4L2_MBUS_FMT_AHSV8888_1X32 = 0x6001, > -}; > +#define v4l2_mbus_pixelcode media_bus_format > > /** > * struct v4l2_mbus_framefmt - frame format on the media bus
Em Fri, 07 Nov 2014 13:43:59 +0200 Sakari Ailus <sakari.ailus@iki.fi> escreveu: >> +enum media_bus_format { > > There's no really a need to keep the definitions inside the enum. It looks a > little bit confusing to me. That made me realise something I missed > yesterday. > > There's a difference: the enum in C++ is a different thing than in C, and > the enum type isn't able to contain any other values than those defined in > the enumeration. > > So what I propose is the following. Keep enum v4l2_mbus_pixelcode around, > including the enum values. Define new values for MEDIA_BUS_* equivalents > using preprocessor macros, as you've done below. Drop the definition of enum > media_bus_format, and use u32 (or uint32_t) type for the variables. > > This way the enum stays intact for existing C++ applications, and new > applications will have to use a 32-bit type. Yeah, enums at the public API is bad, as any change there can potentially cause C++ apps to break.
On Fri, 7 Nov 2014 13:43:59 +0200 Sakari Ailus <sakari.ailus@iki.fi> wrote: > Hi Boris, > > Thank you for the update. > > On Thu, Nov 06, 2014 at 10:56:59AM +0100, Boris Brezillon wrote: > > Rename mediabus formats and move the enum into a separate header file so > > that it can be used by DRM/KMS subsystem without any reference to the V4L2 > > subsystem. > > > > Old v4l2_mbus_pixelcode now points to media_bus_format. > > > > Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> > > Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> > > --- > > include/uapi/linux/Kbuild | 1 + > > include/uapi/linux/media-bus-format.h | 131 ++++++++++++++++++++++++++++++++++ > > include/uapi/linux/v4l2-mediabus.h | 114 +---------------------------- > > 3 files changed, 134 insertions(+), 112 deletions(-) > > create mode 100644 include/uapi/linux/media-bus-format.h > > > > diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild > > index b70237e..b2c23f8 100644 > > --- a/include/uapi/linux/Kbuild > > +++ b/include/uapi/linux/Kbuild > > @@ -414,6 +414,7 @@ header-y += veth.h > > header-y += vfio.h > > header-y += vhost.h > > header-y += videodev2.h > > +header-y += media-bus-format.h > > Could you arrange this to the list alphabetically, please? > > > header-y += virtio_9p.h > > header-y += virtio_balloon.h > > header-y += virtio_blk.h > > diff --git a/include/uapi/linux/media-bus-format.h b/include/uapi/linux/media-bus-format.h > > new file mode 100644 > > index 0000000..251a902 > > --- /dev/null > > +++ b/include/uapi/linux/media-bus-format.h > > @@ -0,0 +1,131 @@ > > +/* > > + * Media Bus API header > > + * > > + * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de> > > + * > > + * 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 __LINUX_MEDIA_BUS_FORMAT_H > > +#define __LINUX_MEDIA_BUS_FORMAT_H > > + > > +/* > > + * These bus formats uniquely identify data formats on the data bus. Format 0 > > + * is reserved, MEDIA_BUS_FMT_FIXED shall be used by host-client pairs, where > > + * the data format is fixed. Additionally, "2X8" means that one pixel is > > + * transferred in two 8-bit samples, "BE" or "LE" specify in which order those > > + * samples are transferred over the bus: "LE" means that the least significant > > + * bits are transferred first, "BE" means that the most significant bits are > > + * transferred first, and "PADHI" and "PADLO" define which bits - low or high, > > + * in the incomplete high byte, are filled with padding bits. > > + * > > + * The bus formats are grouped by type, bus_width, bits per component, samples > > + * per pixel and order of subsamples. Numerical values are sorted using generic > > + * numerical sort order (8 thus comes before 10). > > + * > > + * As their value can't change when a new bus format is inserted in the > > + * enumeration, the bus formats are explicitly given a numerical value. The next > > + * free values for each category are listed below, update them when inserting > > + * new pixel codes. > > + */ > > + > > +#define MEDIA_BUS_FMT_ENTRY(name, val) \ > > + MEDIA_BUS_FMT_ ## name = val, \ > > + V4L2_MBUS_FMT_ ## name = val > > + > > +enum media_bus_format { > > There's no really a need to keep the definitions inside the enum. It looks a > little bit confusing to me. That made me realise something I missed > yesterday. > > There's a difference: the enum in C++ is a different thing than in C, and > the enum type isn't able to contain any other values than those defined in > the enumeration. > > So what I propose is the following. Keep enum v4l2_mbus_pixelcode around, > including the enum values. Define new values for MEDIA_BUS_* equivalents > using preprocessor macros, as you've done below. Drop the definition of enum > media_bus_format, and use u32 (or uint32_t) type for the variables. > > This way the enum stays intact for existing C++ applications, and new > applications will have to use a 32-bit type. > Fair enough. If Hans agree I'll rework the series and drop the media_bus_format enum. Thanks, Boris
On 11/07/14 12:43, Sakari Ailus wrote: > Hi Boris, > > Thank you for the update. > > On Thu, Nov 06, 2014 at 10:56:59AM +0100, Boris Brezillon wrote: >> Rename mediabus formats and move the enum into a separate header file so >> that it can be used by DRM/KMS subsystem without any reference to the V4L2 >> subsystem. >> >> Old v4l2_mbus_pixelcode now points to media_bus_format. >> >> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> >> Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> >> --- >> include/uapi/linux/Kbuild | 1 + >> include/uapi/linux/media-bus-format.h | 131 ++++++++++++++++++++++++++++++++++ >> include/uapi/linux/v4l2-mediabus.h | 114 +---------------------------- >> 3 files changed, 134 insertions(+), 112 deletions(-) >> create mode 100644 include/uapi/linux/media-bus-format.h >> >> diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild >> index b70237e..b2c23f8 100644 >> --- a/include/uapi/linux/Kbuild >> +++ b/include/uapi/linux/Kbuild >> @@ -414,6 +414,7 @@ header-y += veth.h >> header-y += vfio.h >> header-y += vhost.h >> header-y += videodev2.h >> +header-y += media-bus-format.h > > Could you arrange this to the list alphabetically, please? > >> header-y += virtio_9p.h >> header-y += virtio_balloon.h >> header-y += virtio_blk.h >> diff --git a/include/uapi/linux/media-bus-format.h b/include/uapi/linux/media-bus-format.h >> new file mode 100644 >> index 0000000..251a902 >> --- /dev/null >> +++ b/include/uapi/linux/media-bus-format.h >> @@ -0,0 +1,131 @@ >> +/* >> + * Media Bus API header >> + * >> + * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de> >> + * >> + * 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 __LINUX_MEDIA_BUS_FORMAT_H >> +#define __LINUX_MEDIA_BUS_FORMAT_H >> + >> +/* >> + * These bus formats uniquely identify data formats on the data bus. Format 0 >> + * is reserved, MEDIA_BUS_FMT_FIXED shall be used by host-client pairs, where >> + * the data format is fixed. Additionally, "2X8" means that one pixel is >> + * transferred in two 8-bit samples, "BE" or "LE" specify in which order those >> + * samples are transferred over the bus: "LE" means that the least significant >> + * bits are transferred first, "BE" means that the most significant bits are >> + * transferred first, and "PADHI" and "PADLO" define which bits - low or high, >> + * in the incomplete high byte, are filled with padding bits. >> + * >> + * The bus formats are grouped by type, bus_width, bits per component, samples >> + * per pixel and order of subsamples. Numerical values are sorted using generic >> + * numerical sort order (8 thus comes before 10). >> + * >> + * As their value can't change when a new bus format is inserted in the >> + * enumeration, the bus formats are explicitly given a numerical value. The next >> + * free values for each category are listed below, update them when inserting >> + * new pixel codes. >> + */ >> + >> +#define MEDIA_BUS_FMT_ENTRY(name, val) \ >> + MEDIA_BUS_FMT_ ## name = val, \ >> + V4L2_MBUS_FMT_ ## name = val >> + >> +enum media_bus_format { > > There's no really a need to keep the definitions inside the enum. It looks a > little bit confusing to me. That made me realise something I missed > yesterday. > > There's a difference: the enum in C++ is a different thing than in C, and > the enum type isn't able to contain any other values than those defined in > the enumeration. > > So what I propose is the following. Keep enum v4l2_mbus_pixelcode around, > including the enum values. Define new values for MEDIA_BUS_* equivalents > using preprocessor macros, as you've done below. Drop the definition of enum > media_bus_format, and use u32 (or uint32_t) type for the variables. > > This way the enum stays intact for existing C++ applications, and new > applications will have to use a 32-bit type. > > I'd like to get an ok from Hans to this as well. OK, let's do this. Let's keep enum v4l2_mbus_pixelcode but only under #ifndef __KERNEL and with a comment that this enum is deprecated and frozen and that the values from the new header should be used. And make the new MEDIA_BUS_FMT_ values defines instead of an enum. Regards, Hans -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild index b70237e..b2c23f8 100644 --- a/include/uapi/linux/Kbuild +++ b/include/uapi/linux/Kbuild @@ -414,6 +414,7 @@ header-y += veth.h header-y += vfio.h header-y += vhost.h header-y += videodev2.h +header-y += media-bus-format.h header-y += virtio_9p.h header-y += virtio_balloon.h header-y += virtio_blk.h diff --git a/include/uapi/linux/media-bus-format.h b/include/uapi/linux/media-bus-format.h new file mode 100644 index 0000000..251a902 --- /dev/null +++ b/include/uapi/linux/media-bus-format.h @@ -0,0 +1,131 @@ +/* + * Media Bus API header + * + * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de> + * + * 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 __LINUX_MEDIA_BUS_FORMAT_H +#define __LINUX_MEDIA_BUS_FORMAT_H + +/* + * These bus formats uniquely identify data formats on the data bus. Format 0 + * is reserved, MEDIA_BUS_FMT_FIXED shall be used by host-client pairs, where + * the data format is fixed. Additionally, "2X8" means that one pixel is + * transferred in two 8-bit samples, "BE" or "LE" specify in which order those + * samples are transferred over the bus: "LE" means that the least significant + * bits are transferred first, "BE" means that the most significant bits are + * transferred first, and "PADHI" and "PADLO" define which bits - low or high, + * in the incomplete high byte, are filled with padding bits. + * + * The bus formats are grouped by type, bus_width, bits per component, samples + * per pixel and order of subsamples. Numerical values are sorted using generic + * numerical sort order (8 thus comes before 10). + * + * As their value can't change when a new bus format is inserted in the + * enumeration, the bus formats are explicitly given a numerical value. The next + * free values for each category are listed below, update them when inserting + * new pixel codes. + */ + +#define MEDIA_BUS_FMT_ENTRY(name, val) \ + MEDIA_BUS_FMT_ ## name = val, \ + V4L2_MBUS_FMT_ ## name = val + +enum media_bus_format { + MEDIA_BUS_FMT_ENTRY(FIXED, 0x0001), + + /* RGB - next is 0x100e */ + MEDIA_BUS_FMT_ENTRY(RGB444_2X8_PADHI_BE, 0x1001), + MEDIA_BUS_FMT_ENTRY(RGB444_2X8_PADHI_LE, 0x1002), + MEDIA_BUS_FMT_ENTRY(RGB555_2X8_PADHI_BE, 0x1003), + MEDIA_BUS_FMT_ENTRY(RGB555_2X8_PADHI_LE, 0x1004), + MEDIA_BUS_FMT_ENTRY(BGR565_2X8_BE, 0x1005), + MEDIA_BUS_FMT_ENTRY(BGR565_2X8_LE, 0x1006), + MEDIA_BUS_FMT_ENTRY(RGB565_2X8_BE, 0x1007), + MEDIA_BUS_FMT_ENTRY(RGB565_2X8_LE, 0x1008), + MEDIA_BUS_FMT_ENTRY(RGB666_1X18, 0x1009), + MEDIA_BUS_FMT_ENTRY(RGB888_1X24, 0x100a), + MEDIA_BUS_FMT_ENTRY(RGB888_2X12_BE, 0x100b), + MEDIA_BUS_FMT_ENTRY(RGB888_2X12_LE, 0x100c), + MEDIA_BUS_FMT_ENTRY(ARGB8888_1X32, 0x100d), + + /* YUV (including grey) - next is 0x2024 */ + MEDIA_BUS_FMT_ENTRY(Y8_1X8, 0x2001), + MEDIA_BUS_FMT_ENTRY(UV8_1X8, 0x2015), + MEDIA_BUS_FMT_ENTRY(UYVY8_1_5X8, 0x2002), + MEDIA_BUS_FMT_ENTRY(VYUY8_1_5X8, 0x2003), + MEDIA_BUS_FMT_ENTRY(YUYV8_1_5X8, 0x2004), + MEDIA_BUS_FMT_ENTRY(YVYU8_1_5X8, 0x2005), + MEDIA_BUS_FMT_ENTRY(UYVY8_2X8, 0x2006), + MEDIA_BUS_FMT_ENTRY(VYUY8_2X8, 0x2007), + MEDIA_BUS_FMT_ENTRY(YUYV8_2X8, 0x2008), + MEDIA_BUS_FMT_ENTRY(YVYU8_2X8, 0x2009), + MEDIA_BUS_FMT_ENTRY(Y10_1X10, 0x200a), + MEDIA_BUS_FMT_ENTRY(UYVY10_2X10, 0x2018), + MEDIA_BUS_FMT_ENTRY(VYUY10_2X10, 0x2019), + MEDIA_BUS_FMT_ENTRY(YUYV10_2X10, 0x200b), + MEDIA_BUS_FMT_ENTRY(YVYU10_2X10, 0x200c), + MEDIA_BUS_FMT_ENTRY(Y12_1X12, 0x2013), + MEDIA_BUS_FMT_ENTRY(UYVY8_1X16, 0x200f), + MEDIA_BUS_FMT_ENTRY(VYUY8_1X16, 0x2010), + MEDIA_BUS_FMT_ENTRY(YUYV8_1X16, 0x2011), + MEDIA_BUS_FMT_ENTRY(YVYU8_1X16, 0x2012), + MEDIA_BUS_FMT_ENTRY(YDYUYDYV8_1X16, 0x2014), + MEDIA_BUS_FMT_ENTRY(UYVY10_1X20, 0x201a), + MEDIA_BUS_FMT_ENTRY(VYUY10_1X20, 0x201b), + MEDIA_BUS_FMT_ENTRY(YUYV10_1X20, 0x200d), + MEDIA_BUS_FMT_ENTRY(YVYU10_1X20, 0x200e), + MEDIA_BUS_FMT_ENTRY(YUV10_1X30, 0x2016), + MEDIA_BUS_FMT_ENTRY(AYUV8_1X32, 0x2017), + MEDIA_BUS_FMT_ENTRY(UYVY12_2X12, 0x201c), + MEDIA_BUS_FMT_ENTRY(VYUY12_2X12, 0x201d), + MEDIA_BUS_FMT_ENTRY(YUYV12_2X12, 0x201e), + MEDIA_BUS_FMT_ENTRY(YVYU12_2X12, 0x201f), + MEDIA_BUS_FMT_ENTRY(UYVY12_1X24, 0x2020), + MEDIA_BUS_FMT_ENTRY(VYUY12_1X24, 0x2021), + MEDIA_BUS_FMT_ENTRY(YUYV12_1X24, 0x2022), + MEDIA_BUS_FMT_ENTRY(YVYU12_1X24, 0x2023), + + /* Bayer - next is 0x3019 */ + MEDIA_BUS_FMT_ENTRY(SBGGR8_1X8, 0x3001), + MEDIA_BUS_FMT_ENTRY(SGBRG8_1X8, 0x3013), + MEDIA_BUS_FMT_ENTRY(SGRBG8_1X8, 0x3002), + MEDIA_BUS_FMT_ENTRY(SRGGB8_1X8, 0x3014), + MEDIA_BUS_FMT_ENTRY(SBGGR10_ALAW8_1X8, 0x3015), + MEDIA_BUS_FMT_ENTRY(SGBRG10_ALAW8_1X8, 0x3016), + MEDIA_BUS_FMT_ENTRY(SGRBG10_ALAW8_1X8, 0x3017), + MEDIA_BUS_FMT_ENTRY(SRGGB10_ALAW8_1X8, 0x3018), + MEDIA_BUS_FMT_ENTRY(SBGGR10_DPCM8_1X8, 0x300b), + MEDIA_BUS_FMT_ENTRY(SGBRG10_DPCM8_1X8, 0x300c), + MEDIA_BUS_FMT_ENTRY(SGRBG10_DPCM8_1X8, 0x3009), + MEDIA_BUS_FMT_ENTRY(SRGGB10_DPCM8_1X8, 0x300d), + MEDIA_BUS_FMT_ENTRY(SBGGR10_2X8_PADHI_BE, 0x3003), + MEDIA_BUS_FMT_ENTRY(SBGGR10_2X8_PADHI_LE, 0x3004), + MEDIA_BUS_FMT_ENTRY(SBGGR10_2X8_PADLO_BE, 0x3005), + MEDIA_BUS_FMT_ENTRY(SBGGR10_2X8_PADLO_LE, 0x3006), + MEDIA_BUS_FMT_ENTRY(SBGGR10_1X10, 0x3007), + MEDIA_BUS_FMT_ENTRY(SGBRG10_1X10, 0x300e), + MEDIA_BUS_FMT_ENTRY(SGRBG10_1X10, 0x300a), + MEDIA_BUS_FMT_ENTRY(SRGGB10_1X10, 0x300f), + MEDIA_BUS_FMT_ENTRY(SBGGR12_1X12, 0x3008), + MEDIA_BUS_FMT_ENTRY(SGBRG12_1X12, 0x3010), + MEDIA_BUS_FMT_ENTRY(SGRBG12_1X12, 0x3011), + MEDIA_BUS_FMT_ENTRY(SRGGB12_1X12, 0x3012), + + /* JPEG compressed formats - next is 0x4002 */ + MEDIA_BUS_FMT_ENTRY(JPEG_1X8, 0x4001), + + /* Vendor specific formats - next is 0x5002 */ + + /* S5C73M3 sensor specific interleaved UYVY and JPEG */ + MEDIA_BUS_FMT_ENTRY(S5C_UYVY_JPEG_1X8, 0x5001), + + /* HSV - next is 0x6002 */ + MEDIA_BUS_FMT_ENTRY(AHSV8888_1X32, 0x6001), +}; + +#endif /* __LINUX_MEDIA_BUS_FORMAT_H */ diff --git a/include/uapi/linux/v4l2-mediabus.h b/include/uapi/linux/v4l2-mediabus.h index 1445e85..d30526c 100644 --- a/include/uapi/linux/v4l2-mediabus.h +++ b/include/uapi/linux/v4l2-mediabus.h @@ -13,119 +13,9 @@ #include <linux/types.h> #include <linux/videodev2.h> +#include <linux/media-bus-format.h> -/* - * These pixel codes uniquely identify data formats on the media bus. Mostly - * they correspond to similarly named V4L2_PIX_FMT_* formats, format 0 is - * reserved, V4L2_MBUS_FMT_FIXED shall be used by host-client pairs, where the - * data format is fixed. Additionally, "2X8" means that one pixel is transferred - * in two 8-bit samples, "BE" or "LE" specify in which order those samples are - * transferred over the bus: "LE" means that the least significant bits are - * transferred first, "BE" means that the most significant bits are transferred - * first, and "PADHI" and "PADLO" define which bits - low or high, in the - * incomplete high byte, are filled with padding bits. - * - * The pixel codes are grouped by type, bus_width, bits per component, samples - * per pixel and order of subsamples. Numerical values are sorted using generic - * numerical sort order (8 thus comes before 10). - * - * As their value can't change when a new pixel code is inserted in the - * enumeration, the pixel codes are explicitly given a numerical value. The next - * free values for each category are listed below, update them when inserting - * new pixel codes. - */ -enum v4l2_mbus_pixelcode { - V4L2_MBUS_FMT_FIXED = 0x0001, - - /* RGB - next is 0x100e */ - V4L2_MBUS_FMT_RGB444_2X8_PADHI_BE = 0x1001, - V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE = 0x1002, - V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE = 0x1003, - V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE = 0x1004, - V4L2_MBUS_FMT_BGR565_2X8_BE = 0x1005, - V4L2_MBUS_FMT_BGR565_2X8_LE = 0x1006, - V4L2_MBUS_FMT_RGB565_2X8_BE = 0x1007, - V4L2_MBUS_FMT_RGB565_2X8_LE = 0x1008, - V4L2_MBUS_FMT_RGB666_1X18 = 0x1009, - V4L2_MBUS_FMT_RGB888_1X24 = 0x100a, - V4L2_MBUS_FMT_RGB888_2X12_BE = 0x100b, - V4L2_MBUS_FMT_RGB888_2X12_LE = 0x100c, - V4L2_MBUS_FMT_ARGB8888_1X32 = 0x100d, - - /* YUV (including grey) - next is 0x2024 */ - V4L2_MBUS_FMT_Y8_1X8 = 0x2001, - V4L2_MBUS_FMT_UV8_1X8 = 0x2015, - V4L2_MBUS_FMT_UYVY8_1_5X8 = 0x2002, - V4L2_MBUS_FMT_VYUY8_1_5X8 = 0x2003, - V4L2_MBUS_FMT_YUYV8_1_5X8 = 0x2004, - V4L2_MBUS_FMT_YVYU8_1_5X8 = 0x2005, - V4L2_MBUS_FMT_UYVY8_2X8 = 0x2006, - V4L2_MBUS_FMT_VYUY8_2X8 = 0x2007, - V4L2_MBUS_FMT_YUYV8_2X8 = 0x2008, - V4L2_MBUS_FMT_YVYU8_2X8 = 0x2009, - V4L2_MBUS_FMT_Y10_1X10 = 0x200a, - V4L2_MBUS_FMT_UYVY10_2X10 = 0x2018, - V4L2_MBUS_FMT_VYUY10_2X10 = 0x2019, - V4L2_MBUS_FMT_YUYV10_2X10 = 0x200b, - V4L2_MBUS_FMT_YVYU10_2X10 = 0x200c, - V4L2_MBUS_FMT_Y12_1X12 = 0x2013, - V4L2_MBUS_FMT_UYVY8_1X16 = 0x200f, - V4L2_MBUS_FMT_VYUY8_1X16 = 0x2010, - V4L2_MBUS_FMT_YUYV8_1X16 = 0x2011, - V4L2_MBUS_FMT_YVYU8_1X16 = 0x2012, - V4L2_MBUS_FMT_YDYUYDYV8_1X16 = 0x2014, - V4L2_MBUS_FMT_UYVY10_1X20 = 0x201a, - V4L2_MBUS_FMT_VYUY10_1X20 = 0x201b, - V4L2_MBUS_FMT_YUYV10_1X20 = 0x200d, - V4L2_MBUS_FMT_YVYU10_1X20 = 0x200e, - V4L2_MBUS_FMT_YUV10_1X30 = 0x2016, - V4L2_MBUS_FMT_AYUV8_1X32 = 0x2017, - V4L2_MBUS_FMT_UYVY12_2X12 = 0x201c, - V4L2_MBUS_FMT_VYUY12_2X12 = 0x201d, - V4L2_MBUS_FMT_YUYV12_2X12 = 0x201e, - V4L2_MBUS_FMT_YVYU12_2X12 = 0x201f, - V4L2_MBUS_FMT_UYVY12_1X24 = 0x2020, - V4L2_MBUS_FMT_VYUY12_1X24 = 0x2021, - V4L2_MBUS_FMT_YUYV12_1X24 = 0x2022, - V4L2_MBUS_FMT_YVYU12_1X24 = 0x2023, - - /* Bayer - next is 0x3019 */ - V4L2_MBUS_FMT_SBGGR8_1X8 = 0x3001, - V4L2_MBUS_FMT_SGBRG8_1X8 = 0x3013, - V4L2_MBUS_FMT_SGRBG8_1X8 = 0x3002, - V4L2_MBUS_FMT_SRGGB8_1X8 = 0x3014, - V4L2_MBUS_FMT_SBGGR10_ALAW8_1X8 = 0x3015, - V4L2_MBUS_FMT_SGBRG10_ALAW8_1X8 = 0x3016, - V4L2_MBUS_FMT_SGRBG10_ALAW8_1X8 = 0x3017, - V4L2_MBUS_FMT_SRGGB10_ALAW8_1X8 = 0x3018, - V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8 = 0x300b, - V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8 = 0x300c, - V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8 = 0x3009, - V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8 = 0x300d, - V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE = 0x3003, - V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE = 0x3004, - V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE = 0x3005, - V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE = 0x3006, - V4L2_MBUS_FMT_SBGGR10_1X10 = 0x3007, - V4L2_MBUS_FMT_SGBRG10_1X10 = 0x300e, - V4L2_MBUS_FMT_SGRBG10_1X10 = 0x300a, - V4L2_MBUS_FMT_SRGGB10_1X10 = 0x300f, - V4L2_MBUS_FMT_SBGGR12_1X12 = 0x3008, - V4L2_MBUS_FMT_SGBRG12_1X12 = 0x3010, - V4L2_MBUS_FMT_SGRBG12_1X12 = 0x3011, - V4L2_MBUS_FMT_SRGGB12_1X12 = 0x3012, - - /* JPEG compressed formats - next is 0x4002 */ - V4L2_MBUS_FMT_JPEG_1X8 = 0x4001, - - /* Vendor specific formats - next is 0x5002 */ - - /* S5C73M3 sensor specific interleaved UYVY and JPEG */ - V4L2_MBUS_FMT_S5C_UYVY_JPEG_1X8 = 0x5001, - - /* HSV - next is 0x6002 */ - V4L2_MBUS_FMT_AHSV8888_1X32 = 0x6001, -}; +#define v4l2_mbus_pixelcode media_bus_format /** * struct v4l2_mbus_framefmt - frame format on the media bus