Re: [PATCH V6 2/5] New control class and features for FM RX

From: Hans Verkuil
Date: Mon May 14 2012 - 17:45:30 EST

On Mon May 14 2012 22:27:21 manjunatha_halli@xxxxxx wrote:
> From: Manjunatha Halli <x0130808@xxxxxx>
>
> This patch creates new ctrl class for FM RX and adds new CID's for
> below FM features,
> 1) De-Emphasis filter mode
> 2) RDS Alternate Frequency switch
>
> Also this patch adds a field for band selection in struct v4l2_hw_freq_seek
> and adds new capability flags for all below FM bands
> 1) V4L2_TUNER_CAP_BAND_TYPE_DEFAULT -> Default Band
> 2) V4L2_TUNER_CAP_BAND_TYPE_EUROPE_US -> Europe/US Band
> 3) V4L2_TUNER_CAP_BAND_TYPE_JAPAN -> Japan Band
> 4) V4L2_TUNER_CAP_BAND_TYPE_RUSSIAN -> Russian Band
> 5) V4L2_TUNER_CAP_BAND_TYPE_WEATHER -> Weather Band
>
> Signed-off-by: Manjunatha Halli <x0130808@xxxxxx>
> ---
> drivers/media/video/v4l2-ctrls.c | 17 ++++++++++++++---
> include/linux/videodev2.h | 24 +++++++++++++++++++++++-
> 2 files changed, 37 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/media/video/v4l2-ctrls.c b/drivers/media/video/v4l2-ctrls.c
> index 18015c0..9d7608e 100644
> --- a/drivers/media/video/v4l2-ctrls.c
> +++ b/drivers/media/video/v4l2-ctrls.c
> @@ -243,8 +243,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
> "Vivid",
> NULL
> };
> - static const char * const tune_preemphasis[] = {
> - "No Preemphasis",
> + static const char * const tune_emphasis[] = {
> + "None",
> "50 Microseconds",
> "75 Microseconds",
> NULL,
> @@ -413,7 +413,9 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
> case V4L2_CID_COLORFX:
> return colorfx;
> case V4L2_CID_TUNE_PREEMPHASIS:
> - return tune_preemphasis;
> + return tune_emphasis;
> + case V4L2_CID_TUNE_DEEMPHASIS:
> + return tune_emphasis;
> case V4L2_CID_FLASH_LED_MODE:
> return flash_led_mode;
> case V4L2_CID_FLASH_STROBE_SOURCE:
> @@ -644,6 +646,12 @@ const char *v4l2_ctrl_get_name(u32 id)
> case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality";
> case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers";
>
> + /* FM Radio Receiver control */
> + /* Keep the order of the 'case's the same as in videodev2.h! */
> + case V4L2_CID_FM_RX_CLASS: return "FM Radio Receiver Controls";
> + case V4L2_CID_RDS_AF_SWITCH: return "RDS Alternate Frequency Switch";
> + case V4L2_CID_TUNE_DEEMPHASIS: return "De-Emphasis";
> +
> default:
> return NULL;
> }
> @@ -688,6 +696,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
> case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
> case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
> case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
> + case V4L2_CID_RDS_AF_SWITCH:
> *type = V4L2_CTRL_TYPE_BOOLEAN;
> *min = 0;
> *max = *step = 1;
> @@ -733,6 +742,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
> case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
> case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
> case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
> + case V4L2_CID_TUNE_DEEMPHASIS:
> *type = V4L2_CTRL_TYPE_MENU;
> break;
> case V4L2_CID_RDS_TX_PS_NAME:
> @@ -745,6 +755,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
> case V4L2_CID_FM_TX_CLASS:
> case V4L2_CID_FLASH_CLASS:
> case V4L2_CID_JPEG_CLASS:
> + case V4L2_CID_FM_RX_CLASS:
> *type = V4L2_CTRL_TYPE_CTRL_CLASS;
> /* You can neither read not write these */
> *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
> diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
> index c9c9a46..91bc47b 100644
> --- a/include/linux/videodev2.h
> +++ b/include/linux/videodev2.h
> @@ -1137,6 +1137,7 @@ struct v4l2_ext_controls {
> #define V4L2_CTRL_CLASS_FM_TX 0x009b0000 /* FM Modulator control class */
> #define V4L2_CTRL_CLASS_FLASH 0x009c0000 /* Camera flash controls */
> #define V4L2_CTRL_CLASS_JPEG 0x009d0000 /* JPEG-compression controls */
> +#define V4L2_CTRL_CLASS_FM_RX 0x009e0000 /* FM Receiver control class */
>
> #define V4L2_CTRL_ID_MASK (0x0fffffff)
> #define V4L2_CTRL_ID2CLASS(id) ((id) & 0x0fff0000UL)
> @@ -1782,6 +1783,13 @@ enum v4l2_jpeg_chroma_subsampling {
> #define V4L2_JPEG_ACTIVE_MARKER_DQT (1 << 17)
> #define V4L2_JPEG_ACTIVE_MARKER_DHT (1 << 18)
>
> +/* FM Receiver class control IDs */
> +#define V4L2_CID_FM_RX_CLASS_BASE (V4L2_CTRL_CLASS_FM_RX | 0x900)
> +#define V4L2_CID_FM_RX_CLASS (V4L2_CTRL_CLASS_FM_RX | 1)
> +
> +#define V4L2_CID_RDS_AF_SWITCH (V4L2_CID_FM_RX_CLASS_BASE + 1)
> +#define V4L2_CID_TUNE_DEEMPHASIS (V4L2_CID_FM_RX_CLASS_BASE + 2)
> +
> /*
> * T U N I N G
> */
> @@ -1819,6 +1827,12 @@ struct v4l2_modulator {
> #define V4L2_TUNER_CAP_RDS 0x0080
> #define V4L2_TUNER_CAP_RDS_BLOCK_IO 0x0100
> #define V4L2_TUNER_CAP_RDS_CONTROLS 0x0200
> +#define V4L2_TUNER_CAP_BAND_TYPE_DEFAULT 0x00000000 /* Default band */
> +#define V4L2_TUNER_CAP_BAND_TYPE_EUROPE_US 0x00010000 /* Europe/US band */
> +#define V4L2_TUNER_CAP_BAND_TYPE_JAPAN 0x00020000 /* Japan band */
> +#define V4L2_TUNER_CAP_BAND_TYPE_RUSSIAN 0x00030000 /* Russian band */
> +#define V4L2_TUNER_CAP_BAND_TYPE_WEATHER 0x00040000 /* Weather band */
> +
>
> /* Flags for the 'rxsubchans' field */
> #define V4L2_TUNER_SUB_MONO 0x0001
> @@ -1843,13 +1857,21 @@ struct v4l2_frequency {
> __u32 reserved[8];
> };
>
> +
> +#define V4L2_FM_BAND__DEFAULT 0

Just report this one to fix the double underscore (__DEFAULT) :-)

Regards,

Hans

> +#define V4L2_FM_BAND_EUROPE_US 1 /* 87.5 Mhz - 108 MHz */
> +#define V4L2_FM_BAND_JAPAN 2 /* 76 MHz - 90 MHz */
> +#define V4L2_FM_BAND_RUSSIAN 3 /* 65.8 MHz - 74 MHz */
> +#define V4L2_FM_BAND_WEATHER 4 /* 162.4 MHz - 162.55 MHz */
> +
> struct v4l2_hw_freq_seek {
> __u32 tuner;
> enum v4l2_tuner_type type;
> __u32 seek_upward;
> __u32 wrap_around;
> __u32 spacing;
> - __u32 reserved[7];
> + __u32 band;
> + __u32 reserved[6];
> };
>
> /*
>
--
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