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    SubjectRe: [PATCH] I2C update for 2.6.6
    ChangeSet 1.1587.15.13, 2004/05/11 13:44:19-07:00,

    [PATCH] I2C: new i2c video decoder calls

    Attached patch adds three new calls to the i2c video decoder API. The changes
    were requested by Michael (CC'ed) and approved by Gerd Knorr (v4l maintainer,

    Short explanation:

    * INIT is a general initialization call with optional initialization data.
    Reason for this is that several i2c decoders (or general: clients) are being
    used by several adapters (main drivers), and in some cases, one adapter
    simply needs different settings than the other, either because the adapter
    is completely different or because the card was reverse engineered in a way
    that doesn't allow multiple adapters to run using the same original
    initialization data. Michael faces such a problem right now. Both he and
    me lack time to properly sit together and work out the exact details or a
    proper way to merge.

    * VBI_BYPASS and GPIO set specific pins on the decoder. This will be used
    in the saa7111 driver. My driver (zr36067, original user of the saa7111
    driver) doesn't use any of this, but Michael's does.

    include/linux/video_decoder.h | 7 +++++++
    1 files changed, 7 insertions(+)

    diff -Nru a/include/linux/video_decoder.h b/include/linux/video_decoder.h
    --- a/include/linux/video_decoder.h Fri May 14 16:19:20 2004
    +++ b/include/linux/video_decoder.h Fri May 14 16:19:20 2004
    @@ -22,6 +22,10 @@
    #define DECODER_STATUS_NTSC 8 /* auto detected */
    #define DECODER_STATUS_SECAM 16 /* auto detected */

    +struct video_decoder_init {
    + unsigned char len;
    + const unsigned char *data;

    #define DECODER_GET_CAPABILITIES _IOR('d', 1, struct video_decoder_capability)
    #define DECODER_GET_STATUS _IOR('d', 2, int)
    @@ -30,6 +34,9 @@
    #define DECODER_SET_OUTPUT _IOW('d', 5, int) /* 0 <= output < #outputs */
    #define DECODER_ENABLE_OUTPUT _IOW('d', 6, int) /* boolean output enable control */
    #define DECODER_SET_PICTURE _IOW('d', 7, struct video_picture)
    +#define DECODER_SET_GPIO _IOW('d', 8, int) /* switch general purpose pin */
    +#define DECODER_INIT _IOW('d', 9, struct video_decoder_init) /* init internal registers at once */
    +#define DECODER_SET_VBI_BYPASS _IOW('d', 10, int) /* switch vbi bypass */

    #define DECODER_DUMP _IO('d', 192) /* debug hook */

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