mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-13 14:14:37 +00:00
Code Issues Releases Wiki Activity
linux-stable/drivers/media/i2c/saa6752hs.c
Tomi Valkeinen 0d346d2a6f media: v4l2-subdev: add subdev-wide state struct 
We have 'struct v4l2_subdev_pad_config' which contains configuration for
a single pad used for the TRY functionality, and an array of those
structs is passed to various v4l2_subdev_pad_ops.

I was working on subdev internal routing between pads, and realized that
there's no way to add TRY functionality for routes, which is not pad
specific configuration. Adding a separate struct for try-route config
wouldn't work either, as e.g. set-fmt needs to know the try-route
configuration to propagate the settings.

This patch adds a new struct, 'struct v4l2_subdev_state' (which at the
moment only contains the v4l2_subdev_pad_config array) and the new
struct is used in most of the places where v4l2_subdev_pad_config was
used. All v4l2_subdev_pad_ops functions taking v4l2_subdev_pad_config
are changed to instead take v4l2_subdev_state.

The changes to drivers/media/v4l2-core/v4l2-subdev.c and
include/media/v4l2-subdev.h were written by hand, and all the driver
changes were done with the semantic patch below. The spatch needs to be
applied to a select list of directories. I used the following shell
commands to apply the spatch:

dirs="drivers/media/i2c drivers/media/platform drivers/media/usb drivers/media/test-drivers/vimc drivers/media/pci drivers/staging/media"
for dir in $dirs; do spatch -j8 --dir --include-headers --no-show-diff --in-place --sp-file v4l2-subdev-state.cocci $dir; done

Note that Coccinelle chokes on a few drivers (gcc extensions?). With
minor changes we can make Coccinelle run fine, and these changes can be
reverted after spatch. The diff for these changes is:

For drivers/media/i2c/s5k5baf.c:

	@@ -1481,7 +1481,7 @@ static int s5k5baf_set_selection(struct v4l2_subdev *sd,
	 				&s5k5baf_cis_rect,
	 				v4l2_subdev_get_try_crop(sd, cfg, PAD_CIS),
	 				v4l2_subdev_get_try_compose(sd, cfg, PAD_CIS),
	-				v4l2_subdev_get_try_crop(sd, cfg, PAD_OUT)
	+				v4l2_subdev_get_try_crop(sd, cfg, PAD_OUT),
	 			};
	 		s5k5baf_set_rect_and_adjust(rects, rtype, &sel->r);
	 		return 0;

For drivers/media/platform/s3c-camif/camif-capture.c:

	@@ -1230,7 +1230,7 @@ static int s3c_camif_subdev_get_fmt(struct v4l2_subdev *sd,
	 		*mf = camif->mbus_fmt;
	 		break;

	-	case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
	+	case CAMIF_SD_PAD_SOURCE_C:
	 		/* crop rectangle at camera interface input */
	 		mf->width = camif->camif_crop.width;
	 		mf->height = camif->camif_crop.height;
	@@ -1332,7 +1332,7 @@ static int s3c_camif_subdev_set_fmt(struct v4l2_subdev *sd,
	 		}
	 		break;

	-	case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
	+	case CAMIF_SD_PAD_SOURCE_C:
	 		/* Pixel format can be only changed on the sink pad. */
	 		mf->code = camif->mbus_fmt.code;
	 		mf->width = crop->width;

The semantic patch is:

// <smpl>

// Change function parameter

@@
identifier func;
identifier cfg;
@@

 func(...,
-   struct v4l2_subdev_pad_config *cfg
+   struct v4l2_subdev_state *sd_state
    , ...)
 {
 <...
- cfg
+ sd_state
 ...>
 }

// Change function declaration parameter

@@
identifier func;
identifier cfg;
type T;
@@
T func(...,
-   struct v4l2_subdev_pad_config *cfg
+   struct v4l2_subdev_state *sd_state
    , ...);

// Change function return value

@@
identifier func;
@@
- struct v4l2_subdev_pad_config
+ struct v4l2_subdev_state
 *func(...)
 {
    ...
 }

// Change function declaration return value

@@
identifier func;
@@
- struct v4l2_subdev_pad_config
+ struct v4l2_subdev_state
 *func(...);

// Some drivers pass a local pad_cfg for a single pad to a called function. Wrap it
// inside a pad_state.

@@
identifier func;
identifier pad_cfg;
@@
func(...)
{
    ...
    struct v4l2_subdev_pad_config pad_cfg;
+   struct v4l2_subdev_state pad_state = { .pads = &pad_cfg };

    <+...

(
    v4l2_subdev_call
|
    sensor_call
|
    isi_try_fse
|
    isc_try_fse
|
    saa_call_all
)
    (...,
-   &pad_cfg
+   &pad_state
    ,...)

    ...+>
}

// If the function uses fields from pad_config, access via state->pads

@@
identifier func;
identifier state;
@@
 func(...,
    struct v4l2_subdev_state *state
    , ...)
 {
    <...
(
-   state->try_fmt
+   state->pads->try_fmt
|
-   state->try_crop
+   state->pads->try_crop
|
-   state->try_compose
+   state->pads->try_compose
)
    ...>
}

// If the function accesses the filehandle, use fh->state instead

@@
struct v4l2_subdev_fh *fh;
@@
-    fh->pad
+    fh->state

@@
struct v4l2_subdev_fh fh;
@@
-    fh.pad
+    fh.state

// Start of vsp1 specific

@@
@@
struct vsp1_entity {
    ...
-    struct v4l2_subdev_pad_config *config;
+    struct v4l2_subdev_state *config;
    ...
};

@@
symbol entity;
@@
vsp1_entity_init(...)
{
    ...
    entity->config =
-    v4l2_subdev_alloc_pad_config
+    v4l2_subdev_alloc_state
    (&entity->subdev);
    ...
}

@@
symbol entity;
@@
vsp1_entity_destroy(...)
{
    ...
-   v4l2_subdev_free_pad_config
+   v4l2_subdev_free_state
    (entity->config);
    ...
}

@exists@
identifier func =~ "(^vsp1.*)|(hsit_set_format)|(sru_enum_frame_size)|(sru_set_format)|(uif_get_selection)|(uif_set_selection)|(uds_enum_frame_size)|(uds_set_format)|(brx_set_format)|(brx_get_selection)|(histo_get_selection)|(histo_set_selection)|(brx_set_selection)";
symbol config;
@@
func(...) {
    ...
-    struct v4l2_subdev_pad_config *config;
+    struct v4l2_subdev_state *config;
    ...
}

// End of vsp1 specific

// Start of rcar specific

@@
identifier sd;
identifier pad_cfg;
@@
 rvin_try_format(...)
 {
    ...
-   struct v4l2_subdev_pad_config *pad_cfg;
+   struct v4l2_subdev_state *sd_state;
    ...
-   pad_cfg = v4l2_subdev_alloc_pad_config(sd);
+   sd_state = v4l2_subdev_alloc_state(sd);
    <...
-   pad_cfg
+   sd_state
    ...>
-   v4l2_subdev_free_pad_config(pad_cfg);
+   v4l2_subdev_free_state(sd_state);
    ...
 }

// End of rcar specific

// Start of rockchip specific

@@
identifier func =~ "(rkisp1_rsz_get_pad_fmt)|(rkisp1_rsz_get_pad_crop)|(rkisp1_rsz_register)";
symbol rsz;
symbol pad_cfg;
@@

 func(...)
 {
+   struct v4l2_subdev_state state = { .pads = rsz->pad_cfg };
    ...
-   rsz->pad_cfg
+   &state
    ...
 }

@@
identifier func =~ "(rkisp1_isp_get_pad_fmt)|(rkisp1_isp_get_pad_crop)";
symbol isp;
symbol pad_cfg;
@@

 func(...)
 {
+   struct v4l2_subdev_state state = { .pads = isp->pad_cfg };
    ...
-   isp->pad_cfg
+   &state
    ...
 }

@@
symbol rkisp1;
symbol isp;
symbol pad_cfg;
@@

 rkisp1_isp_register(...)
 {
+   struct v4l2_subdev_state state = { .pads = rkisp1->isp.pad_cfg };
    ...
-   rkisp1->isp.pad_cfg
+   &state
    ...
 }

// End of rockchip specific

// Start of tegra-video specific

@@
identifier sd;
identifier pad_cfg;
@@
 __tegra_channel_try_format(...)
 {
    ...
-   struct v4l2_subdev_pad_config *pad_cfg;
+   struct v4l2_subdev_state *sd_state;
    ...
-   pad_cfg = v4l2_subdev_alloc_pad_config(sd);
+   sd_state = v4l2_subdev_alloc_state(sd);
    <...
-   pad_cfg
+   sd_state
    ...>
-   v4l2_subdev_free_pad_config(pad_cfg);
+   v4l2_subdev_free_state(sd_state);
    ...
 }

@@
identifier sd_state;
@@
 __tegra_channel_try_format(...)
 {
    ...
    struct v4l2_subdev_state *sd_state;
    <...
-   sd_state->try_crop
+   sd_state->pads->try_crop
    ...>
 }

// End of tegra-video specific

// </smpl>

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2021-06-17 10:01:27 +02:00

791 lines
21 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-or-later
/*
saa6752hs - i2c-driver for the saa6752hs by Philips
Copyright (C) 2004 Andrew de Quincey
AC-3 support:
Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/i2c.h>
#include <linux/types.h>
#include <linux/videodev2.h>
#include <linux/init.h>
#include <linux/crc32.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-common.h>
#define MPEG_VIDEO_TARGET_BITRATE_MAX 27000
#define MPEG_VIDEO_MAX_BITRATE_MAX 27000
#define MPEG_TOTAL_TARGET_BITRATE_MAX 27000
#define MPEG_PID_MAX ((1 << 14) - 1)
MODULE_DESCRIPTION("device driver for saa6752hs MPEG2 encoder");
MODULE_AUTHOR("Andrew de Quincey");
MODULE_LICENSE("GPL");
enum saa6752hs_videoformat {
SAA6752HS_VF_D1 = 0, /* standard D1 video format: 720x576 */
SAA6752HS_VF_2_3_D1 = 1,/* 2/3D1 video format: 480x576 */
SAA6752HS_VF_1_2_D1 = 2,/* 1/2D1 video format: 352x576 */
SAA6752HS_VF_SIF = 3, /* SIF video format: 352x288 */
SAA6752HS_VF_UNKNOWN,
};
struct saa6752hs_mpeg_params {
/* transport streams */
__u16 ts_pid_pmt;
__u16 ts_pid_audio;
__u16 ts_pid_video;
__u16 ts_pid_pcr;
/* audio */
enum v4l2_mpeg_audio_encoding au_encoding;
enum v4l2_mpeg_audio_l2_bitrate au_l2_bitrate;
enum v4l2_mpeg_audio_ac3_bitrate au_ac3_bitrate;
/* video */
enum v4l2_mpeg_video_aspect vi_aspect;
enum v4l2_mpeg_video_bitrate_mode vi_bitrate_mode;
__u32 vi_bitrate;
__u32 vi_bitrate_peak;
};
static const struct v4l2_format v4l2_format_table[] =
{
[SAA6752HS_VF_D1] =
{ .fmt = { .pix = { .width = 720, .height = 576 }}},
[SAA6752HS_VF_2_3_D1] =
{ .fmt = { .pix = { .width = 480, .height = 576 }}},
[SAA6752HS_VF_1_2_D1] =
{ .fmt = { .pix = { .width = 352, .height = 576 }}},
[SAA6752HS_VF_SIF] =
{ .fmt = { .pix = { .width = 352, .height = 288 }}},
[SAA6752HS_VF_UNKNOWN] =
{ .fmt = { .pix = { .width = 0, .height = 0}}},
};
struct saa6752hs_state {
struct v4l2_subdev sd;
struct v4l2_ctrl_handler hdl;
struct { /* video bitrate mode control cluster */
struct v4l2_ctrl *video_bitrate_mode;
struct v4l2_ctrl *video_bitrate;
struct v4l2_ctrl *video_bitrate_peak;
};
u32 revision;
int has_ac3;
struct saa6752hs_mpeg_params params;
enum saa6752hs_videoformat video_format;
v4l2_std_id standard;
};
enum saa6752hs_command {
SAA6752HS_COMMAND_RESET = 0,
SAA6752HS_COMMAND_STOP = 1,
SAA6752HS_COMMAND_START = 2,
SAA6752HS_COMMAND_PAUSE = 3,
SAA6752HS_COMMAND_RECONFIGURE = 4,
SAA6752HS_COMMAND_SLEEP = 5,
SAA6752HS_COMMAND_RECONFIGURE_FORCE = 6,
SAA6752HS_COMMAND_MAX
};
static inline struct saa6752hs_state *to_state(struct v4l2_subdev *sd)
{
return container_of(sd, struct saa6752hs_state, sd);
}
/* ---------------------------------------------------------------------- */
static const u8 PAT[] = {
0xc2, /* i2c register */
0x00, /* table number for encoder */
0x47, /* sync */
0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid(0) */
0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
0x00, /* PSI pointer to start of table */
0x00, /* tid(0) */
0xb0, 0x0d, /* section_syntax_indicator(1), section_length(13) */
0x00, 0x01, /* transport_stream_id(1) */
0xc1, /* version_number(0), current_next_indicator(1) */
0x00, 0x00, /* section_number(0), last_section_number(0) */
0x00, 0x01, /* program_number(1) */
0xe0, 0x00, /* PMT PID */
0x00, 0x00, 0x00, 0x00 /* CRC32 */
};
static const u8 PMT[] = {
0xc2, /* i2c register */
0x01, /* table number for encoder */
0x47, /* sync */
0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid */
0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
0x00, /* PSI pointer to start of table */
0x02, /* tid(2) */
0xb0, 0x17, /* section_syntax_indicator(1), section_length(23) */
0x00, 0x01, /* program_number(1) */
0xc1, /* version_number(0), current_next_indicator(1) */
0x00, 0x00, /* section_number(0), last_section_number(0) */
0xe0, 0x00, /* PCR_PID */
0xf0, 0x00, /* program_info_length(0) */
0x02, 0xe0, 0x00, 0xf0, 0x00, /* video stream type(2), pid */
0x04, 0xe0, 0x00, 0xf0, 0x00, /* audio stream type(4), pid */
0x00, 0x00, 0x00, 0x00 /* CRC32 */
};
static const u8 PMT_AC3[] = {
0xc2, /* i2c register */
0x01, /* table number for encoder(1) */
0x47, /* sync */
0x40, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0) */
0x10, /* PMT PID (0x0010) */
0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
0x00, /* PSI pointer to start of table */
0x02, /* TID (2) */
0xb0, 0x1a, /* section_syntax_indicator(1), section_length(26) */
0x00, 0x01, /* program_number(1) */
0xc1, /* version_number(0), current_next_indicator(1) */
0x00, 0x00, /* section_number(0), last_section_number(0) */
0xe1, 0x04, /* PCR_PID (0x0104) */
0xf0, 0x00, /* program_info_length(0) */
0x02, 0xe1, 0x00, 0xf0, 0x00, /* video stream type(2), pid */
0x06, 0xe1, 0x03, 0xf0, 0x03, /* audio stream type(6), pid */
0x6a, /* AC3 */
0x01, /* Descriptor_length(1) */
0x00, /* component_type_flag(0), bsid_flag(0), mainid_flag(0), asvc_flag(0), reserved flags(0) */
0xED, 0xDE, 0x2D, 0xF3 /* CRC32 BE */
};
static const struct saa6752hs_mpeg_params param_defaults =
{
.ts_pid_pmt = 16,
.ts_pid_video = 260,
.ts_pid_audio = 256,
.ts_pid_pcr = 259,
.vi_aspect = V4L2_MPEG_VIDEO_ASPECT_4x3,
.vi_bitrate = 4000,
.vi_bitrate_peak = 6000,
.vi_bitrate_mode = V4L2_MPEG_VIDEO_BITRATE_MODE_VBR,
.au_encoding = V4L2_MPEG_AUDIO_ENCODING_LAYER_2,
.au_l2_bitrate = V4L2_MPEG_AUDIO_L2_BITRATE_256K,
.au_ac3_bitrate = V4L2_MPEG_AUDIO_AC3_BITRATE_256K,
};
/* ---------------------------------------------------------------------- */
static int saa6752hs_chip_command(struct i2c_client *client,
enum saa6752hs_command command)
{
unsigned char buf[3];
unsigned long timeout;
int status = 0;
/* execute the command */
switch(command) {
case SAA6752HS_COMMAND_RESET:
buf[0] = 0x00;
break;
case SAA6752HS_COMMAND_STOP:
buf[0] = 0x03;
break;
case SAA6752HS_COMMAND_START:
buf[0] = 0x02;
break;
case SAA6752HS_COMMAND_PAUSE:
buf[0] = 0x04;
break;
case SAA6752HS_COMMAND_RECONFIGURE:
buf[0] = 0x05;
break;
case SAA6752HS_COMMAND_SLEEP:
buf[0] = 0x06;
break;
case SAA6752HS_COMMAND_RECONFIGURE_FORCE:
buf[0] = 0x07;
break;
default:
return -EINVAL;
}
/* set it and wait for it to be so */
i2c_master_send(client, buf, 1);
timeout = jiffies + HZ * 3;
for (;;) {
/* get the current status */
buf[0] = 0x10;
i2c_master_send(client, buf, 1);
i2c_master_recv(client, buf, 1);
if (!(buf[0] & 0x20))
break;
if (time_after(jiffies,timeout)) {
status = -ETIMEDOUT;
break;
}
msleep(10);
}
/* delay a bit to let encoder settle */
msleep(50);
return status;
}
static inline void set_reg8(struct i2c_client *client, uint8_t reg, uint8_t val)
{
u8 buf[2];
buf[0] = reg;
buf[1] = val;
i2c_master_send(client, buf, 2);
}
static inline void set_reg16(struct i2c_client *client, uint8_t reg, uint16_t val)
{
u8 buf[3];
buf[0] = reg;
buf[1] = val >> 8;
buf[2] = val & 0xff;
i2c_master_send(client, buf, 3);
}
static int saa6752hs_set_bitrate(struct i2c_client *client,
struct saa6752hs_state *h)
{
struct saa6752hs_mpeg_params *params = &h->params;
int tot_bitrate;
int is_384k;
/* set the bitrate mode */
set_reg8(client, 0x71,
params->vi_bitrate_mode != V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
/* set the video bitrate */
if (params->vi_bitrate_mode == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR) {
/* set the target bitrate */
set_reg16(client, 0x80, params->vi_bitrate);
/* set the max bitrate */
set_reg16(client, 0x81, params->vi_bitrate_peak);
tot_bitrate = params->vi_bitrate_peak;
} else {
/* set the target bitrate (no max bitrate for CBR) */
set_reg16(client, 0x81, params->vi_bitrate);
tot_bitrate = params->vi_bitrate;
}
/* set the audio encoding */
set_reg8(client, 0x93,
params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3);
/* set the audio bitrate */
if (params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3)
is_384k = V4L2_MPEG_AUDIO_AC3_BITRATE_384K == params->au_ac3_bitrate;
else
is_384k = V4L2_MPEG_AUDIO_L2_BITRATE_384K == params->au_l2_bitrate;
set_reg8(client, 0x94, is_384k);
tot_bitrate += is_384k ? 384 : 256;
/* Note: the total max bitrate is determined by adding the video and audio
bitrates together and also adding an extra 768kbit/s to stay on the
safe side. If more control should be required, then an extra MPEG control
should be added. */
tot_bitrate += 768;
if (tot_bitrate > MPEG_TOTAL_TARGET_BITRATE_MAX)
tot_bitrate = MPEG_TOTAL_TARGET_BITRATE_MAX;
/* set the total bitrate */
set_reg16(client, 0xb1, tot_bitrate);
return 0;
}
static int saa6752hs_try_ctrl(struct v4l2_ctrl *ctrl)
{
struct saa6752hs_state *h =
container_of(ctrl->handler, struct saa6752hs_state, hdl);
switch (ctrl->id) {
case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
/* peak bitrate shall be >= normal bitrate */
if (ctrl->val == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR &&
h->video_bitrate_peak->val < h->video_bitrate->val)
h->video_bitrate_peak->val = h->video_bitrate->val;
break;
}
return 0;
}
static int saa6752hs_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct saa6752hs_state *h =
container_of(ctrl->handler, struct saa6752hs_state, hdl);
struct saa6752hs_mpeg_params *params = &h->params;
switch (ctrl->id) {
case V4L2_CID_MPEG_STREAM_TYPE:
break;
case V4L2_CID_MPEG_STREAM_PID_PMT:
params->ts_pid_pmt = ctrl->val;
break;
case V4L2_CID_MPEG_STREAM_PID_AUDIO:
params->ts_pid_audio = ctrl->val;
break;
case V4L2_CID_MPEG_STREAM_PID_VIDEO:
params->ts_pid_video = ctrl->val;
break;
case V4L2_CID_MPEG_STREAM_PID_PCR:
params->ts_pid_pcr = ctrl->val;
break;
case V4L2_CID_MPEG_AUDIO_ENCODING:
params->au_encoding = ctrl->val;
break;
case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
params->au_l2_bitrate = ctrl->val;
break;
case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
params->au_ac3_bitrate = ctrl->val;
break;
case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
break;
case V4L2_CID_MPEG_VIDEO_ENCODING:
break;
case V4L2_CID_MPEG_VIDEO_ASPECT:
params->vi_aspect = ctrl->val;
break;
case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
params->vi_bitrate_mode = ctrl->val;
params->vi_bitrate = h->video_bitrate->val / 1000;
params->vi_bitrate_peak = h->video_bitrate_peak->val / 1000;
v4l2_ctrl_activate(h->video_bitrate_peak,
ctrl->val == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
break;
default:
return -EINVAL;
}
return 0;
}
static int saa6752hs_init(struct v4l2_subdev *sd, u32 leading_null_bytes)
{
unsigned char buf[9], buf2[4];
struct saa6752hs_state *h = to_state(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
unsigned size;
u32 crc;
unsigned char localPAT[256];
unsigned char localPMT[256];
/* Set video format - must be done first as it resets other settings */
set_reg8(client, 0x41, h->video_format);
/* Set number of lines in input signal */
set_reg8(client, 0x40, (h->standard & V4L2_STD_525_60) ? 1 : 0);
/* set bitrate */
saa6752hs_set_bitrate(client, h);
/* Set GOP structure {3, 13} */
set_reg16(client, 0x72, 0x030d);
/* Set minimum Q-scale {4} */
set_reg8(client, 0x82, 0x04);
/* Set maximum Q-scale {12} */
set_reg8(client, 0x83, 0x0c);
/* Set Output Protocol */
set_reg8(client, 0xd0, 0x81);
/* Set video output stream format {TS} */
set_reg8(client, 0xb0, 0x05);
/* Set leading null byte for TS */
set_reg16(client, 0xf6, leading_null_bytes);
/* compute PAT */
memcpy(localPAT, PAT, sizeof(PAT));
localPAT[17] = 0xe0 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
localPAT[18] = h->params.ts_pid_pmt & 0xff;
crc = crc32_be(~0, &localPAT[7], sizeof(PAT) - 7 - 4);
localPAT[sizeof(PAT) - 4] = (crc >> 24) & 0xFF;
localPAT[sizeof(PAT) - 3] = (crc >> 16) & 0xFF;
localPAT[sizeof(PAT) - 2] = (crc >> 8) & 0xFF;
localPAT[sizeof(PAT) - 1] = crc & 0xFF;
/* compute PMT */
if (h->params.au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3) {
size = sizeof(PMT_AC3);
memcpy(localPMT, PMT_AC3, size);
} else {
size = sizeof(PMT);
memcpy(localPMT, PMT, size);
}
localPMT[3] = 0x40 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
localPMT[4] = h->params.ts_pid_pmt & 0xff;
localPMT[15] = 0xE0 | ((h->params.ts_pid_pcr >> 8) & 0x0F);
localPMT[16] = h->params.ts_pid_pcr & 0xFF;
localPMT[20] = 0xE0 | ((h->params.ts_pid_video >> 8) & 0x0F);
localPMT[21] = h->params.ts_pid_video & 0xFF;
localPMT[25] = 0xE0 | ((h->params.ts_pid_audio >> 8) & 0x0F);
localPMT[26] = h->params.ts_pid_audio & 0xFF;
crc = crc32_be(~0, &localPMT[7], size - 7 - 4);
localPMT[size - 4] = (crc >> 24) & 0xFF;
localPMT[size - 3] = (crc >> 16) & 0xFF;
localPMT[size - 2] = (crc >> 8) & 0xFF;
localPMT[size - 1] = crc & 0xFF;
/* Set Audio PID */
set_reg16(client, 0xc1, h->params.ts_pid_audio);
/* Set Video PID */
set_reg16(client, 0xc0, h->params.ts_pid_video);
/* Set PCR PID */
set_reg16(client, 0xc4, h->params.ts_pid_pcr);
/* Send SI tables */
i2c_master_send(client, localPAT, sizeof(PAT));
i2c_master_send(client, localPMT, size);
/* mute then unmute audio. This removes buzzing artefacts */
set_reg8(client, 0xa4, 1);
set_reg8(client, 0xa4, 0);
/* start it going */
saa6752hs_chip_command(client, SAA6752HS_COMMAND_START);
/* readout current state */
buf[0] = 0xE1;
buf[1] = 0xA7;
buf[2] = 0xFE;
buf[3] = 0x82;
buf[4] = 0xB0;
i2c_master_send(client, buf, 5);
i2c_master_recv(client, buf2, 4);
/* change aspect ratio */
buf[0] = 0xE0;
buf[1] = 0xA7;
buf[2] = 0xFE;
buf[3] = 0x82;
buf[4] = 0xB0;
buf[5] = buf2[0];
switch (h->params.vi_aspect) {
case V4L2_MPEG_VIDEO_ASPECT_16x9:
buf[6] = buf2[1] | 0x40;
break;
case V4L2_MPEG_VIDEO_ASPECT_4x3:
default:
buf[6] = buf2[1] & 0xBF;
break;
}
buf[7] = buf2[2];
buf[8] = buf2[3];
i2c_master_send(client, buf, 9);
return 0;
}
static int saa6752hs_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *format)
{
struct v4l2_mbus_framefmt *f = &format->format;
struct saa6752hs_state *h = to_state(sd);
if (format->pad)
return -EINVAL;
if (h->video_format == SAA6752HS_VF_UNKNOWN)
h->video_format = SAA6752HS_VF_D1;
f->width = v4l2_format_table[h->video_format].fmt.pix.width;
f->height = v4l2_format_table[h->video_format].fmt.pix.height;
f->code = MEDIA_BUS_FMT_FIXED;
f->field = V4L2_FIELD_INTERLACED;
f->colorspace = V4L2_COLORSPACE_SMPTE170M;
return 0;
}
static int saa6752hs_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *format)
{
struct v4l2_mbus_framefmt *f = &format->format;
struct saa6752hs_state *h = to_state(sd);
int dist_352, dist_480, dist_720;
if (format->pad)
return -EINVAL;
f->code = MEDIA_BUS_FMT_FIXED;
dist_352 = abs(f->width - 352);
dist_480 = abs(f->width - 480);
dist_720 = abs(f->width - 720);
if (dist_720 < dist_480) {
f->width = 720;
f->height = 576;
} else if (dist_480 < dist_352) {
f->width = 480;
f->height = 576;
} else {
f->width = 352;
if (abs(f->height - 576) < abs(f->height - 288))
f->height = 576;
else
f->height = 288;
}
f->field = V4L2_FIELD_INTERLACED;
f->colorspace = V4L2_COLORSPACE_SMPTE170M;
if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
sd_state->pads->try_fmt = *f;
return 0;
}
/*
FIXME: translate and round width/height into EMPRESS
subsample type:
type | PAL | NTSC
---------------------------
SIF | 352x288 | 352x240
1/2 D1 | 352x576 | 352x480
2/3 D1 | 480x576 | 480x480
D1 | 720x576 | 720x480
*/
if (f->code != MEDIA_BUS_FMT_FIXED)
return -EINVAL;
if (f->width == 720)
h->video_format = SAA6752HS_VF_D1;
else if (f->width == 480)
h->video_format = SAA6752HS_VF_2_3_D1;
else if (f->height == 576)
h->video_format = SAA6752HS_VF_1_2_D1;
else
h->video_format = SAA6752HS_VF_SIF;
return 0;
}
static int saa6752hs_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
{
struct saa6752hs_state *h = to_state(sd);
h->standard = std;
return 0;
}
/* ----------------------------------------------------------------------- */
static const struct v4l2_ctrl_ops saa6752hs_ctrl_ops = {
.try_ctrl = saa6752hs_try_ctrl,
.s_ctrl = saa6752hs_s_ctrl,
};
static const struct v4l2_subdev_core_ops saa6752hs_core_ops = {
.init = saa6752hs_init,
};
static const struct v4l2_subdev_video_ops saa6752hs_video_ops = {
.s_std = saa6752hs_s_std,
};
static const struct v4l2_subdev_pad_ops saa6752hs_pad_ops = {
.get_fmt = saa6752hs_get_fmt,
.set_fmt = saa6752hs_set_fmt,
};
static const struct v4l2_subdev_ops saa6752hs_ops = {
.core = &saa6752hs_core_ops,
.video = &saa6752hs_video_ops,
.pad = &saa6752hs_pad_ops,
};
static int saa6752hs_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct saa6752hs_state *h;
struct v4l2_subdev *sd;
struct v4l2_ctrl_handler *hdl;
u8 addr = 0x13;
u8 data[12];
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
h = devm_kzalloc(&client->dev, sizeof(*h), GFP_KERNEL);
if (h == NULL)
return -ENOMEM;
sd = &h->sd;
v4l2_i2c_subdev_init(sd, client, &saa6752hs_ops);
i2c_master_send(client, &addr, 1);
i2c_master_recv(client, data, sizeof(data));
h->revision = (data[8] << 8) | data[9];
h->has_ac3 = 0;
if (h->revision == 0x0206) {
h->has_ac3 = 1;
v4l_info(client, "supports AC-3\n");
}
h->params = param_defaults;
hdl = &h->hdl;
v4l2_ctrl_handler_init(hdl, 14);
v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
V4L2_CID_MPEG_AUDIO_ENCODING,
h->has_ac3 ? V4L2_MPEG_AUDIO_ENCODING_AC3 :
V4L2_MPEG_AUDIO_ENCODING_LAYER_2,
0x0d, V4L2_MPEG_AUDIO_ENCODING_LAYER_2);
v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
V4L2_CID_MPEG_AUDIO_L2_BITRATE,
V4L2_MPEG_AUDIO_L2_BITRATE_384K,
~((1 << V4L2_MPEG_AUDIO_L2_BITRATE_256K) |
(1 << V4L2_MPEG_AUDIO_L2_BITRATE_384K)),
V4L2_MPEG_AUDIO_L2_BITRATE_256K);
if (h->has_ac3)
v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
V4L2_CID_MPEG_AUDIO_AC3_BITRATE,
V4L2_MPEG_AUDIO_AC3_BITRATE_384K,
~((1 << V4L2_MPEG_AUDIO_AC3_BITRATE_256K) |
(1 << V4L2_MPEG_AUDIO_AC3_BITRATE_384K)),
V4L2_MPEG_AUDIO_AC3_BITRATE_256K);
v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000,
~(1 << V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000),
V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000);
v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
V4L2_CID_MPEG_VIDEO_ENCODING,
V4L2_MPEG_VIDEO_ENCODING_MPEG_2,
~(1 << V4L2_MPEG_VIDEO_ENCODING_MPEG_2),
V4L2_MPEG_VIDEO_ENCODING_MPEG_2);
v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
V4L2_CID_MPEG_VIDEO_ASPECT,
V4L2_MPEG_VIDEO_ASPECT_16x9, 0x01,
V4L2_MPEG_VIDEO_ASPECT_4x3);
h->video_bitrate_peak = v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
1000000, 27000000, 1000, 8000000);
v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
V4L2_CID_MPEG_STREAM_TYPE,
V4L2_MPEG_STREAM_TYPE_MPEG2_TS,
~(1 << V4L2_MPEG_STREAM_TYPE_MPEG2_TS),
V4L2_MPEG_STREAM_TYPE_MPEG2_TS);
h->video_bitrate_mode = v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
V4L2_MPEG_VIDEO_BITRATE_MODE_CBR, 0,
V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
h->video_bitrate = v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
V4L2_CID_MPEG_VIDEO_BITRATE, 1000000, 27000000, 1000, 6000000);
v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
V4L2_CID_MPEG_STREAM_PID_PMT, 0, (1 << 14) - 1, 1, 16);
v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
V4L2_CID_MPEG_STREAM_PID_AUDIO, 0, (1 << 14) - 1, 1, 260);
v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
V4L2_CID_MPEG_STREAM_PID_VIDEO, 0, (1 << 14) - 1, 1, 256);
v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
V4L2_CID_MPEG_STREAM_PID_PCR, 0, (1 << 14) - 1, 1, 259);
sd->ctrl_handler = hdl;
if (hdl->error) {
int err = hdl->error;
v4l2_ctrl_handler_free(hdl);
return err;
}
v4l2_ctrl_cluster(3, &h->video_bitrate_mode);
v4l2_ctrl_handler_setup(hdl);
h->standard = 0; /* Assume 625 input lines */
return 0;
}
static int saa6752hs_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
v4l2_device_unregister_subdev(sd);
v4l2_ctrl_handler_free(&to_state(sd)->hdl);
return 0;
}
static const struct i2c_device_id saa6752hs_id[] = {
{ "saa6752hs", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, saa6752hs_id);
static struct i2c_driver saa6752hs_driver = {
.driver = {
.name = "saa6752hs",
},
.probe = saa6752hs_probe,
.remove = saa6752hs_remove,
.id_table = saa6752hs_id,
};
module_i2c_driver(saa6752hs_driver);
Reference in a new issue View git blame Copy permalink