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Date: Tue, 26 Feb 2013 09:00:11 +0100
From: Hans Verkuil <hverkuil@...all.nl>
To: Andrey Smirnov <andrew.smirnov@...il.com>
Cc: mchehab@...hat.com, sameo@...ux.intel.com, perex@...ex.cz,
tiwai@...e.de, linux-media@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 5/8] v4l2: Add standard controls for FM receivers
On Tue February 26 2013 07:38:51 Andrey Smirnov wrote:
> This commit introduces new class of standard controls
> V4L2_CTRL_CLASS_FM_RX. This class is intended to all controls
> pertaining to FM receiver chips. Also, two controls belonging to said
> class are added as a part of this commit: V4L2_CID_TUNE_DEEMPHASIS and
> V4L2_CID_RDS_RECEPTION.
>
> Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
Since patches 5/8 and 6/8 are based on work done by Manjunatha Halli you
should state so in your commit message. Credit where credit is due, etc. :-)
> ---
> drivers/media/v4l2-core/v4l2-ctrls.c | 14 +++++++++++---
> include/uapi/linux/v4l2-controls.h | 13 ++++++++++++-
> 2 files changed, 23 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
> index 6b28b58..8b89fb8 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
> @@ -297,8 +297,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
> "Text",
> NULL
> };
> - static const char * const tune_preemphasis[] = {
> - "No Preemphasis",
> + static const char * const tune_emphasis[] = {
> + "None",
> "50 Microseconds",
> "75 Microseconds",
> NULL,
> @@ -508,7 +508,9 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
> case V4L2_CID_SCENE_MODE:
> return scene_mode;
> 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:
> @@ -799,6 +801,9 @@ const char *v4l2_ctrl_get_name(u32 id)
> case V4L2_CID_DV_RX_POWER_PRESENT: return "Power Present";
> case V4L2_CID_DV_RX_RGB_RANGE: return "Rx RGB Quantization Range";
>
> + case V4L2_CID_FM_RX_CLASS: return "FM Radio Receiver Controls";
> + case V4L2_CID_TUNE_DEEMPHASIS: return "De-Emphasis";
> + case V4L2_CID_RDS_RECEPTION: return "RDS Reception";
> default:
> return NULL;
> }
> @@ -846,6 +851,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
> case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
> case V4L2_CID_WIDE_DYNAMIC_RANGE:
> case V4L2_CID_IMAGE_STABILIZATION:
> + case V4L2_CID_RDS_RECEPTION:
> *type = V4L2_CTRL_TYPE_BOOLEAN;
> *min = 0;
> *max = *step = 1;
> @@ -904,6 +910,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
> case V4L2_CID_DV_TX_RGB_RANGE:
> case V4L2_CID_DV_RX_RGB_RANGE:
> case V4L2_CID_TEST_PATTERN:
> + case V4L2_CID_TUNE_DEEMPHASIS:
> *type = V4L2_CTRL_TYPE_MENU;
> break;
> case V4L2_CID_LINK_FREQ:
> @@ -926,6 +933,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
> case V4L2_CID_IMAGE_SOURCE_CLASS:
> case V4L2_CID_IMAGE_PROC_CLASS:
> case V4L2_CID_DV_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/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
> index dcd6374..296d20e 100644
> --- a/include/uapi/linux/v4l2-controls.h
> +++ b/include/uapi/linux/v4l2-controls.h
> @@ -59,6 +59,7 @@
> #define V4L2_CTRL_CLASS_IMAGE_SOURCE 0x009e0000 /* Image source controls */
> #define V4L2_CTRL_CLASS_IMAGE_PROC 0x009f0000 /* Image processing controls */
> #define V4L2_CTRL_CLASS_DV 0x00a00000 /* Digital Video controls */
> +#define V4L2_CTRL_CLASS_FM_RX 0x00a10000 /* Digital Video controls */
>
> /* User-class control IDs */
>
> @@ -711,10 +712,14 @@ enum v4l2_auto_focus_range {
> #define V4L2_CID_PILOT_TONE_FREQUENCY (V4L2_CID_FM_TX_CLASS_BASE + 98)
>
> #define V4L2_CID_TUNE_PREEMPHASIS (V4L2_CID_FM_TX_CLASS_BASE + 112)
> -enum v4l2_preemphasis {
> +enum v4l2_xemphasis {
> V4L2_PREEMPHASIS_DISABLED = 0,
> V4L2_PREEMPHASIS_50_uS = 1,
> V4L2_PREEMPHASIS_75_uS = 2,
> + V4L2_DEEMPHASIS_DISABLED = V4L2_PREEMPHASIS_DISABLED,
> + V4L2_DEEMPHASIS_50_uS = V4L2_PREEMPHASIS_50_uS,
> + V4L2_DEEMPHASIS_75_uS = V4L2_PREEMPHASIS_75_uS,
> +
> };
No, just leave this enum alone. It's part of the public API, so it can't be
renamed.
What is best is if a new enum v4l2_deemphasis is created:
enum v4l2_deemphasis {
V4L2_DEEMPHASIS_DISABLED = V4L2_PREEMPHASIS_DISABLED,
V4L2_DEEMPHASIS_50_uS = V4L2_PREEMPHASIS_50_uS,
V4L2_DEEMPHASIS_75_uS = V4L2_PREEMPHASIS_75_uS,
};
> #define V4L2_CID_TUNE_POWER_LEVEL (V4L2_CID_FM_TX_CLASS_BASE + 113)
> #define V4L2_CID_TUNE_ANTENNA_CAPACITOR (V4L2_CID_FM_TX_CLASS_BASE + 114)
> @@ -825,4 +830,10 @@ enum v4l2_dv_rgb_range {
> #define V4L2_CID_DV_RX_POWER_PRESENT (V4L2_CID_DV_CLASS_BASE + 100)
> #define V4L2_CID_DV_RX_RGB_RANGE (V4L2_CID_DV_CLASS_BASE + 101)
>
> +#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_TUNE_DEEMPHASIS (V4L2_CID_FM_RX_CLASS_BASE + 1)
> +#define V4L2_CID_RDS_RECEPTION (V4L2_CID_FM_RX_CLASS_BASE + 2)
> +
> #endif
>
Regards,
Hans
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