[PATCH v5 4/9] video: Add generic HDMI infoframe helpers

[Ville Syrjälä]

On Fri, Feb 22, 2013 at 08:03:26AM +0100, Thierry Reding wrote:
> Add generic helpers to pack HDMI infoframes into binary buffers.
> 
> Signed-off-by: Thierry Reding <thierry.reding at avionic-design.de>
> ---
> Changes in v2:
> - add support for audio, vendor-specific and SPD infoframes
> - add various validity checks on infoframes
> - factor out checksum computation
> 
> Changes in v3:
> - introduce HDMI_INFOFRAME_HEADER_SIZE
> - fix SPD infoframe SDI field offset
> 
> Changes in v4:
> - remove needless checks for input parameters
> - use memcpy() instead of manual copy loop
> - update SPD SPI enum to include HD-DVD and PMP as per CEA-861-E
> - add audio coding type extension support
> - match audio coding type names to those in CEA-861-E
> 
>  drivers/video/Kconfig  |   3 +
>  drivers/video/Makefile |   1 +
>  drivers/video/hdmi.c   | 308 +++++++++++++++++++++++++++++++++++++++++++++++++
>  include/linux/hdmi.h   | 231 +++++++++++++++++++++++++++++++++++++
>  4 files changed, 543 insertions(+)
>  create mode 100644 drivers/video/hdmi.c
>  create mode 100644 include/linux/hdmi.h
> 
> diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
> index 09f1a18..b11eeab 100644
> --- a/drivers/video/Kconfig
> +++ b/drivers/video/Kconfig
> @@ -52,6 +52,9 @@ config OF_VIDEOMODE
>  	help
>  	  helper to get videomodes from the devicetree
>  
> +config HDMI
> +	bool
> +
>  menuconfig FB
>  	tristate "Support for frame buffer devices"
>  	---help---
> diff --git a/drivers/video/Makefile b/drivers/video/Makefile
> index f592f3b..0b50082 100644
> --- a/drivers/video/Makefile
> +++ b/drivers/video/Makefile
> @@ -5,6 +5,7 @@
>  # Each configuration option enables a list of files.
>  
>  obj-$(CONFIG_VGASTATE)            += vgastate.o
> +obj-$(CONFIG_HDMI)                += hdmi.o
>  obj-y                             += fb_notify.o
>  obj-$(CONFIG_FB)                  += fb.o
>  fb-y                              := fbmem.o fbmon.o fbcmap.o fbsysfs.o \
> diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c
> new file mode 100644
> index 0000000..ab23c9b
> --- /dev/null
> +++ b/drivers/video/hdmi.c
> @@ -0,0 +1,308 @@
> +/*
> + * Copyright (C) 2012 Avionic Design GmbH
> + *
> + * 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.
> + */

BTW was there any discussion about the license? drm is generally MIT.
Are people OK with depending on GPL code for infoframe support?

-- 
Ville Syrjälä
Intel OTC