drivers/media/video/cx18/cx18-mailbox.c - kernel/msm-5.4 - Gitiles

 /*
  *  cx18 mailbox functions
  *
  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  *  02111-1307  USA
  */

 #include <stdarg.h>

 #include "cx18-driver.h"
 #include "cx18-scb.h"
 #include "cx18-irq.h"
 #include "cx18-mailbox.h"

 #define API_FAST (1 << 2) /* Short timeout */
 #define API_SLOW (1 << 3) /* Additional 300ms timeout */

 #define APU 0
 #define CPU 1
 #define EPU 2
 #define HPU 3

 struct cx18_api_info {
 	u32 cmd;
 	u8 flags;		/* Flags, see above */
 	u8 rpu;			/* Processing unit */
 	const char *name; 	/* The name of the command */
 };

 #define API_ENTRY(rpu, x, f) { (x), (f), (rpu), #x }

 static const struct cx18_api_info api_info[] = {
 	/* MPEG encoder API */
 	API_ENTRY(CPU, CX18_CPU_SET_CHANNEL_TYPE,		0),
 	API_ENTRY(CPU, CX18_EPU_DEBUG, 				0),
 	API_ENTRY(CPU, CX18_CREATE_TASK, 			0),
 	API_ENTRY(CPU, CX18_DESTROY_TASK, 			0),
 	API_ENTRY(CPU, CX18_CPU_CAPTURE_START,                  API_SLOW),
 	API_ENTRY(CPU, CX18_CPU_CAPTURE_STOP,                   API_SLOW),
 	API_ENTRY(CPU, CX18_CPU_CAPTURE_PAUSE,                  0),
 	API_ENTRY(CPU, CX18_CPU_CAPTURE_RESUME,                 0),
 	API_ENTRY(CPU, CX18_CPU_SET_CHANNEL_TYPE,               0),
 	API_ENTRY(CPU, CX18_CPU_SET_STREAM_OUTPUT_TYPE,         0),
 	API_ENTRY(CPU, CX18_CPU_SET_VIDEO_IN,                   0),
 	API_ENTRY(CPU, CX18_CPU_SET_VIDEO_RATE,                 0),
 	API_ENTRY(CPU, CX18_CPU_SET_VIDEO_RESOLUTION,           0),
 	API_ENTRY(CPU, CX18_CPU_SET_FILTER_PARAM,               0),
 	API_ENTRY(CPU, CX18_CPU_SET_SPATIAL_FILTER_TYPE,        0),
 	API_ENTRY(CPU, CX18_CPU_SET_MEDIAN_CORING,              0),
 	API_ENTRY(CPU, CX18_CPU_SET_INDEXTABLE,                 0),
 	API_ENTRY(CPU, CX18_CPU_SET_AUDIO_PARAMETERS,           0),
 	API_ENTRY(CPU, CX18_CPU_SET_VIDEO_MUTE,                 0),
 	API_ENTRY(CPU, CX18_CPU_SET_AUDIO_MUTE,                 0),
 	API_ENTRY(CPU, CX18_CPU_SET_MISC_PARAMETERS,            0),
 	API_ENTRY(CPU, CX18_CPU_SET_RAW_VBI_PARAM,              API_SLOW),
 	API_ENTRY(CPU, CX18_CPU_SET_CAPTURE_LINE_NO,            0),
 	API_ENTRY(CPU, CX18_CPU_SET_COPYRIGHT,                  0),
 	API_ENTRY(CPU, CX18_CPU_SET_AUDIO_PID,                  0),
 	API_ENTRY(CPU, CX18_CPU_SET_VIDEO_PID,                  0),
 	API_ENTRY(CPU, CX18_CPU_SET_VER_CROP_LINE,              0),
 	API_ENTRY(CPU, CX18_CPU_SET_GOP_STRUCTURE,              0),
 	API_ENTRY(CPU, CX18_CPU_SET_SCENE_CHANGE_DETECTION,     0),
 	API_ENTRY(CPU, CX18_CPU_SET_ASPECT_RATIO,               0),
 	API_ENTRY(CPU, CX18_CPU_SET_SKIP_INPUT_FRAME,           0),
 	API_ENTRY(CPU, CX18_CPU_SET_SLICED_VBI_PARAM,           0),
 	API_ENTRY(CPU, CX18_CPU_SET_USERDATA_PLACE_HOLDER,      0),
 	API_ENTRY(CPU, CX18_CPU_GET_ENC_PTS,                    0),
 	API_ENTRY(CPU, CX18_CPU_DE_SET_MDL_ACK,			0),
 	API_ENTRY(CPU, CX18_CPU_DE_SET_MDL,			API_FAST),
 	API_ENTRY(0, 0,						0),
 };

 static const struct cx18_api_info *find_api_info(u32 cmd)
 {
 	int i;

 	for (i = 0; api_info[i].cmd; i++)
 		if (api_info[i].cmd == cmd)
 			return &api_info[i];
 	return NULL;
 }

 static struct cx18_mailbox *cx18_mb_is_complete(struct cx18 *cx, int rpu,
 		u32 *state, u32 *irq, u32 *req)
 {
 	struct cx18_mailbox *mb = NULL;
 	int wait_count = 0;
 	u32 ack;

 	switch (rpu) {
 	case APU:
 		mb = &cx->scb->epu2apu_mb;
 		*state = readl(&cx->scb->apu_state);
 		*irq = readl(&cx->scb->epu2apu_irq);
 		break;

 	case CPU:
 		mb = &cx->scb->epu2cpu_mb;
 		*state = readl(&cx->scb->cpu_state);
 		*irq = readl(&cx->scb->epu2cpu_irq);
 		break;

 	case HPU:
 		mb = &cx->scb->epu2hpu_mb;
 		*state = readl(&cx->scb->hpu_state);
 		*irq = readl(&cx->scb->epu2hpu_irq);
 		break;
 	}

 	if (mb == NULL)
 		return mb;

 	do {
 		*req = readl(&mb->request);
 		ack = readl(&mb->ack);
 		wait_count++;
 	} while (*req != ack && wait_count < 600);

 	if (*req == ack) {
 		(*req)++;
 		if (*req == 0 || *req == 0xffffffff)
 			*req = 1;
 		return mb;
 	}
 	return NULL;
 }

 long cx18_mb_ack(struct cx18 *cx, const struct cx18_mailbox *mb)
 {
 	const struct cx18_api_info *info = find_api_info(mb->cmd);
 	struct cx18_mailbox *ack_mb;
 	u32 ack_irq;
 	u8 rpu = CPU;

 	if (info == NULL && mb->cmd) {
 		CX18_WARN("Cannot ack unknown command %x\n", mb->cmd);
 		return -EINVAL;
 	}
 	if (info)
 		rpu = info->rpu;

 	switch (rpu) {
 	case HPU:
 		ack_irq = IRQ_EPU_TO_HPU_ACK;
 		ack_mb = &cx->scb->hpu2epu_mb;
 		break;
 	case APU:
 		ack_irq = IRQ_EPU_TO_APU_ACK;
 		ack_mb = &cx->scb->apu2epu_mb;
 		break;
 	case CPU:
 		ack_irq = IRQ_EPU_TO_CPU_ACK;
 		ack_mb = &cx->scb->cpu2epu_mb;
 		break;
 	default:
 		CX18_WARN("Unknown RPU for command %x\n", mb->cmd);
 		return -EINVAL;
 	}

 	setup_page(SCB_OFFSET);
 	write_sync(mb->request, &ack_mb->ack);
 	write_reg(ack_irq, SW2_INT_SET);
 	return 0;
 }


 static int cx18_api_call(struct cx18 *cx, u32 cmd, int args, u32 data[])
 {
 	const struct cx18_api_info *info = find_api_info(cmd);
 	u32 state = 0, irq = 0, req, oldreq, err;
 	struct cx18_mailbox *mb;
 	wait_queue_head_t *waitq;
 	int timeout = 100;
 	int cnt = 0;
 	int sig = 0;
 	int i;

 	if (info == NULL) {
 		CX18_WARN("unknown cmd %x\n", cmd);
 		return -EINVAL;
 	}

 	if (cmd == CX18_CPU_DE_SET_MDL)
 		CX18_DEBUG_HI_API("%s\n", info->name);
 	else
 		CX18_DEBUG_API("%s\n", info->name);
 	setup_page(SCB_OFFSET);
 	mb = cx18_mb_is_complete(cx, info->rpu, &state, &irq, &req);

 	if (mb == NULL) {
 		CX18_ERR("mb %s busy\n", info->name);
 		return -EBUSY;
 	}

 	oldreq = req - 1;
 	writel(cmd, &mb->cmd);
 	for (i = 0; i < args; i++)
 		writel(data[i], &mb->args[i]);
 	writel(0, &mb->error);
 	writel(req, &mb->request);

 	switch (info->rpu) {
 	case APU: waitq = &cx->mb_apu_waitq; break;
 	case CPU: waitq = &cx->mb_cpu_waitq; break;
 	case EPU: waitq = &cx->mb_epu_waitq; break;
 	case HPU: waitq = &cx->mb_hpu_waitq; break;
 	default: return -EINVAL;
 	}
 	if (info->flags & API_FAST)
 		timeout /= 2;
 	write_reg(irq, SW1_INT_SET);

 	while (!sig && readl(&mb->ack) != readl(&mb->request) && cnt < 660) {
 		if (cnt > 200 && !in_atomic())
 			sig = cx18_msleep_timeout(10, 1);
 		cnt++;
 	}
 	if (sig)
 		return -EINTR;
 	if (cnt == 660) {
 		writel(oldreq, &mb->request);
 		CX18_ERR("mb %s failed\n", info->name);
 		return -EINVAL;
 	}
 	for (i = 0; i < MAX_MB_ARGUMENTS; i++)
 		data[i] = readl(&mb->args[i]);
 	err = readl(&mb->error);
 	if (!in_atomic() && (info->flags & API_SLOW))
 		cx18_msleep_timeout(300, 0);
 	if (err)
 		CX18_DEBUG_API("mailbox error %08x for command %s\n", err,
 				info->name);
 	return err ? -EIO : 0;
 }

 int cx18_api(struct cx18 *cx, u32 cmd, int args, u32 data[])
 {
 	int res = cx18_api_call(cx, cmd, args, data);

 	/* Allow a single retry, probably already too late though.
 	   If there is no free mailbox then that is usually an indication
 	   of a more serious problem. */
 	return (res == -EBUSY) ? cx18_api_call(cx, cmd, args, data) : res;
 }

 static int cx18_set_filter_param(struct cx18_stream *s)
 {
 	struct cx18 *cx = s->cx;
 	u32 mode;
 	int ret;

 	mode = (cx->filter_mode & 1) ? 2 : (cx->spatial_strength ? 1 : 0);
 	ret = cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
 			s->handle, 1, mode, cx->spatial_strength);
 	mode = (cx->filter_mode & 2) ? 2 : (cx->temporal_strength ? 1 : 0);
 	ret = ret ? ret : cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
 			s->handle, 0, mode, cx->temporal_strength);
 	ret = ret ? ret : cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
 			s->handle, 2, cx->filter_mode >> 2, 0);
 	return ret;
 }

 int cx18_api_func(void *priv, u32 cmd, int in, int out,
 		u32 data[CX2341X_MBOX_MAX_DATA])
 {
 	struct cx18 *cx = priv;
 	struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];

 	switch (cmd) {
 	case CX2341X_ENC_SET_OUTPUT_PORT:
 		return 0;
 	case CX2341X_ENC_SET_FRAME_RATE:
 		return cx18_vapi(cx, CX18_CPU_SET_VIDEO_IN, 6,
 				s->handle, 0, 0, 0, 0, data[0]);
 	case CX2341X_ENC_SET_FRAME_SIZE:
 		return cx18_vapi(cx, CX18_CPU_SET_VIDEO_RESOLUTION, 3,
 				s->handle, data[1], data[0]);
 	case CX2341X_ENC_SET_STREAM_TYPE:
 		return cx18_vapi(cx, CX18_CPU_SET_STREAM_OUTPUT_TYPE, 2,
 				s->handle, data[0]);
 	case CX2341X_ENC_SET_ASPECT_RATIO:
 		return cx18_vapi(cx, CX18_CPU_SET_ASPECT_RATIO, 2,
 				s->handle, data[0]);

 	case CX2341X_ENC_SET_GOP_PROPERTIES:
 		return cx18_vapi(cx, CX18_CPU_SET_GOP_STRUCTURE, 3,
 				s->handle, data[0], data[1]);
 	case CX2341X_ENC_SET_GOP_CLOSURE:
 		return 0;
 	case CX2341X_ENC_SET_AUDIO_PROPERTIES:
 		return cx18_vapi(cx, CX18_CPU_SET_AUDIO_PARAMETERS, 2,
 				s->handle, data[0]);
 	case CX2341X_ENC_MUTE_AUDIO:
 		return cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2,
 				s->handle, data[0]);
 	case CX2341X_ENC_SET_BIT_RATE:
 		return cx18_vapi(cx, CX18_CPU_SET_VIDEO_RATE, 5,
 				s->handle, data[0], data[1], data[2], data[3]);
 	case CX2341X_ENC_MUTE_VIDEO:
 		return cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2,
 				s->handle, data[0]);
 	case CX2341X_ENC_SET_FRAME_DROP_RATE:
 		return cx18_vapi(cx, CX18_CPU_SET_SKIP_INPUT_FRAME, 2,
 				s->handle, data[0]);
 	case CX2341X_ENC_MISC:
 		return cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 4,
 				s->handle, data[0], data[1], data[2]);
 	case CX2341X_ENC_SET_DNR_FILTER_MODE:
 		cx->filter_mode = (data[0] & 3) | (data[1] << 2);
 		return cx18_set_filter_param(s);
 	case CX2341X_ENC_SET_DNR_FILTER_PROPS:
 		cx->spatial_strength = data[0];
 		cx->temporal_strength = data[1];
 		return cx18_set_filter_param(s);
 	case CX2341X_ENC_SET_SPATIAL_FILTER_TYPE:
 		return cx18_vapi(cx, CX18_CPU_SET_SPATIAL_FILTER_TYPE, 3,
 				s->handle, data[0], data[1]);
 	case CX2341X_ENC_SET_CORING_LEVELS:
 		return cx18_vapi(cx, CX18_CPU_SET_MEDIAN_CORING, 5,
 				s->handle, data[0], data[1], data[2], data[3]);
 	}
 	CX18_WARN("Unknown cmd %x\n", cmd);
 	return 0;
 }

 int cx18_vapi_result(struct cx18 *cx, u32 data[MAX_MB_ARGUMENTS],
 		u32 cmd, int args, ...)
 {
 	va_list ap;
 	int i;

 	va_start(ap, args);
 	for (i = 0; i < args; i++)
 		data[i] = va_arg(ap, u32);
 	va_end(ap);
 	return cx18_api(cx, cmd, args, data);
 }

 int cx18_vapi(struct cx18 *cx, u32 cmd, int args, ...)
 {
 	u32 data[MAX_MB_ARGUMENTS];
 	va_list ap;
 	int i;

 	if (cx == NULL) {
 		CX18_ERR("cx == NULL (cmd=%x)\n", cmd);
 		return 0;
 	}
 	if (args > MAX_MB_ARGUMENTS) {
 		CX18_ERR("args too big (cmd=%x)\n", cmd);
 		args = MAX_MB_ARGUMENTS;
 	}
 	va_start(ap, args);
 	for (i = 0; i < args; i++)
 		data[i] = va_arg(ap, u32);
 	va_end(ap);
 	return cx18_api(cx, cmd, args, data);
 }
	/*
	* cx18 mailbox functions
	*
	* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	* 02111-1307 USA
	*/

	#include <stdarg.h>

	#include "cx18-driver.h"
	#include "cx18-scb.h"
	#include "cx18-irq.h"
	#include "cx18-mailbox.h"

	#define API_FAST (1 << 2) /* Short timeout */
	#define API_SLOW (1 << 3) /* Additional 300ms timeout */

	#define APU 0
	#define CPU 1
	#define EPU 2
	#define HPU 3

	struct cx18_api_info {
	u32 cmd;
	u8 flags; /* Flags, see above */
	u8 rpu; /* Processing unit */
	const char name; / The name of the command */
	};

	#define API_ENTRY(rpu, x, f) { (x), (f), (rpu), #x }

	static const struct cx18_api_info api_info[] = {
	/* MPEG encoder API */
	API_ENTRY(CPU, CX18_CPU_SET_CHANNEL_TYPE, 0),
	API_ENTRY(CPU, CX18_EPU_DEBUG, 0),
	API_ENTRY(CPU, CX18_CREATE_TASK, 0),
	API_ENTRY(CPU, CX18_DESTROY_TASK, 0),
	API_ENTRY(CPU, CX18_CPU_CAPTURE_START, API_SLOW),
	API_ENTRY(CPU, CX18_CPU_CAPTURE_STOP, API_SLOW),
	API_ENTRY(CPU, CX18_CPU_CAPTURE_PAUSE, 0),
	API_ENTRY(CPU, CX18_CPU_CAPTURE_RESUME, 0),
	API_ENTRY(CPU, CX18_CPU_SET_CHANNEL_TYPE, 0),
	API_ENTRY(CPU, CX18_CPU_SET_STREAM_OUTPUT_TYPE, 0),
	API_ENTRY(CPU, CX18_CPU_SET_VIDEO_IN, 0),
	API_ENTRY(CPU, CX18_CPU_SET_VIDEO_RATE, 0),
	API_ENTRY(CPU, CX18_CPU_SET_VIDEO_RESOLUTION, 0),
	API_ENTRY(CPU, CX18_CPU_SET_FILTER_PARAM, 0),
	API_ENTRY(CPU, CX18_CPU_SET_SPATIAL_FILTER_TYPE, 0),
	API_ENTRY(CPU, CX18_CPU_SET_MEDIAN_CORING, 0),
	API_ENTRY(CPU, CX18_CPU_SET_INDEXTABLE, 0),
	API_ENTRY(CPU, CX18_CPU_SET_AUDIO_PARAMETERS, 0),
	API_ENTRY(CPU, CX18_CPU_SET_VIDEO_MUTE, 0),
	API_ENTRY(CPU, CX18_CPU_SET_AUDIO_MUTE, 0),
	API_ENTRY(CPU, CX18_CPU_SET_MISC_PARAMETERS, 0),
	API_ENTRY(CPU, CX18_CPU_SET_RAW_VBI_PARAM, API_SLOW),
	API_ENTRY(CPU, CX18_CPU_SET_CAPTURE_LINE_NO, 0),
	API_ENTRY(CPU, CX18_CPU_SET_COPYRIGHT, 0),
	API_ENTRY(CPU, CX18_CPU_SET_AUDIO_PID, 0),
	API_ENTRY(CPU, CX18_CPU_SET_VIDEO_PID, 0),
	API_ENTRY(CPU, CX18_CPU_SET_VER_CROP_LINE, 0),
	API_ENTRY(CPU, CX18_CPU_SET_GOP_STRUCTURE, 0),
	API_ENTRY(CPU, CX18_CPU_SET_SCENE_CHANGE_DETECTION, 0),
	API_ENTRY(CPU, CX18_CPU_SET_ASPECT_RATIO, 0),
	API_ENTRY(CPU, CX18_CPU_SET_SKIP_INPUT_FRAME, 0),
	API_ENTRY(CPU, CX18_CPU_SET_SLICED_VBI_PARAM, 0),
	API_ENTRY(CPU, CX18_CPU_SET_USERDATA_PLACE_HOLDER, 0),
	API_ENTRY(CPU, CX18_CPU_GET_ENC_PTS, 0),
	API_ENTRY(CPU, CX18_CPU_DE_SET_MDL_ACK, 0),
	API_ENTRY(CPU, CX18_CPU_DE_SET_MDL, API_FAST),
	API_ENTRY(0, 0, 0),
	};

	static const struct cx18_api_info *find_api_info(u32 cmd)
	{
	int i;

	for (i = 0; api_info[i].cmd; i++)
	if (api_info[i].cmd == cmd)
	return &api_info[i];
	return NULL;
	}

	static struct cx18_mailbox cx18_mb_is_complete(struct cx18 cx, int rpu,
	u32 state, u32 irq, u32 *req)
	{
	struct cx18_mailbox *mb = NULL;
	int wait_count = 0;
	u32 ack;

	switch (rpu) {
	case APU:
	mb = &cx->scb->epu2apu_mb;
	*state = readl(&cx->scb->apu_state);
	*irq = readl(&cx->scb->epu2apu_irq);
	break;

	case CPU:
	mb = &cx->scb->epu2cpu_mb;
	*state = readl(&cx->scb->cpu_state);
	*irq = readl(&cx->scb->epu2cpu_irq);
	break;

	case HPU:
	mb = &cx->scb->epu2hpu_mb;
	*state = readl(&cx->scb->hpu_state);
	*irq = readl(&cx->scb->epu2hpu_irq);
	break;
	}

	if (mb == NULL)
	return mb;

	do {
	*req = readl(&mb->request);
	ack = readl(&mb->ack);
	wait_count++;
	} while (*req != ack && wait_count < 600);

	if (*req == ack) {
	(*req)++;
	if (req == 0 \|\| req == 0xffffffff)
	*req = 1;
	return mb;
	}
	return NULL;
	}

	long cx18_mb_ack(struct cx18 cx, const struct cx18_mailbox mb)
	{
	const struct cx18_api_info *info = find_api_info(mb->cmd);
	struct cx18_mailbox *ack_mb;
	u32 ack_irq;
	u8 rpu = CPU;

	if (info == NULL && mb->cmd) {
	CX18_WARN("Cannot ack unknown command %x\n", mb->cmd);
	return -EINVAL;
	}
	if (info)
	rpu = info->rpu;

	switch (rpu) {
	case HPU:
	ack_irq = IRQ_EPU_TO_HPU_ACK;
	ack_mb = &cx->scb->hpu2epu_mb;
	break;
	case APU:
	ack_irq = IRQ_EPU_TO_APU_ACK;
	ack_mb = &cx->scb->apu2epu_mb;
	break;
	case CPU:
	ack_irq = IRQ_EPU_TO_CPU_ACK;
	ack_mb = &cx->scb->cpu2epu_mb;
	break;
	default:
	CX18_WARN("Unknown RPU for command %x\n", mb->cmd);
	return -EINVAL;
	}

	setup_page(SCB_OFFSET);
	write_sync(mb->request, &ack_mb->ack);
	write_reg(ack_irq, SW2_INT_SET);
	return 0;
	}


	static int cx18_api_call(struct cx18 *cx, u32 cmd, int args, u32 data[])
	{
	const struct cx18_api_info *info = find_api_info(cmd);
	u32 state = 0, irq = 0, req, oldreq, err;
	struct cx18_mailbox *mb;
	wait_queue_head_t *waitq;
	int timeout = 100;
	int cnt = 0;
	int sig = 0;
	int i;

	if (info == NULL) {
	CX18_WARN("unknown cmd %x\n", cmd);
	return -EINVAL;
	}

	if (cmd == CX18_CPU_DE_SET_MDL)
	CX18_DEBUG_HI_API("%s\n", info->name);
	else
	CX18_DEBUG_API("%s\n", info->name);
	setup_page(SCB_OFFSET);
	mb = cx18_mb_is_complete(cx, info->rpu, &state, &irq, &req);

	if (mb == NULL) {
	CX18_ERR("mb %s busy\n", info->name);
	return -EBUSY;
	}

	oldreq = req - 1;
	writel(cmd, &mb->cmd);
	for (i = 0; i < args; i++)
	writel(data[i], &mb->args[i]);
	writel(0, &mb->error);
	writel(req, &mb->request);

	switch (info->rpu) {
	case APU: waitq = &cx->mb_apu_waitq; break;
	case CPU: waitq = &cx->mb_cpu_waitq; break;
	case EPU: waitq = &cx->mb_epu_waitq; break;
	case HPU: waitq = &cx->mb_hpu_waitq; break;
	default: return -EINVAL;
	}
	if (info->flags & API_FAST)
	timeout /= 2;
	write_reg(irq, SW1_INT_SET);

	while (!sig && readl(&mb->ack) != readl(&mb->request) && cnt < 660) {
	if (cnt > 200 && !in_atomic())
	sig = cx18_msleep_timeout(10, 1);
	cnt++;
	}
	if (sig)
	return -EINTR;
	if (cnt == 660) {
	writel(oldreq, &mb->request);
	CX18_ERR("mb %s failed\n", info->name);
	return -EINVAL;
	}
	for (i = 0; i < MAX_MB_ARGUMENTS; i++)
	data[i] = readl(&mb->args[i]);
	err = readl(&mb->error);
	if (!in_atomic() && (info->flags & API_SLOW))
	cx18_msleep_timeout(300, 0);
	if (err)
	CX18_DEBUG_API("mailbox error %08x for command %s\n", err,
	info->name);
	return err ? -EIO : 0;
	}

	int cx18_api(struct cx18 *cx, u32 cmd, int args, u32 data[])
	{
	int res = cx18_api_call(cx, cmd, args, data);

	/* Allow a single retry, probably already too late though.
	If there is no free mailbox then that is usually an indication
	of a more serious problem. */
	return (res == -EBUSY) ? cx18_api_call(cx, cmd, args, data) : res;
	}

	static int cx18_set_filter_param(struct cx18_stream *s)
	{
	struct cx18 *cx = s->cx;
	u32 mode;
	int ret;

	mode = (cx->filter_mode & 1) ? 2 : (cx->spatial_strength ? 1 : 0);
	ret = cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
	s->handle, 1, mode, cx->spatial_strength);
	mode = (cx->filter_mode & 2) ? 2 : (cx->temporal_strength ? 1 : 0);
	ret = ret ? ret : cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
	s->handle, 0, mode, cx->temporal_strength);
	ret = ret ? ret : cx18_vapi(cx, CX18_CPU_SET_FILTER_PARAM, 4,
	s->handle, 2, cx->filter_mode >> 2, 0);
	return ret;
	}

	int cx18_api_func(void *priv, u32 cmd, int in, int out,
	u32 data[CX2341X_MBOX_MAX_DATA])
	{
	struct cx18 *cx = priv;
	struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];

	switch (cmd) {
	case CX2341X_ENC_SET_OUTPUT_PORT:
	return 0;
	case CX2341X_ENC_SET_FRAME_RATE:
	return cx18_vapi(cx, CX18_CPU_SET_VIDEO_IN, 6,
	s->handle, 0, 0, 0, 0, data[0]);
	case CX2341X_ENC_SET_FRAME_SIZE:
	return cx18_vapi(cx, CX18_CPU_SET_VIDEO_RESOLUTION, 3,
	s->handle, data[1], data[0]);
	case CX2341X_ENC_SET_STREAM_TYPE:
	return cx18_vapi(cx, CX18_CPU_SET_STREAM_OUTPUT_TYPE, 2,
	s->handle, data[0]);
	case CX2341X_ENC_SET_ASPECT_RATIO:
	return cx18_vapi(cx, CX18_CPU_SET_ASPECT_RATIO, 2,
	s->handle, data[0]);

	case CX2341X_ENC_SET_GOP_PROPERTIES:
	return cx18_vapi(cx, CX18_CPU_SET_GOP_STRUCTURE, 3,
	s->handle, data[0], data[1]);
	case CX2341X_ENC_SET_GOP_CLOSURE:
	return 0;
	case CX2341X_ENC_SET_AUDIO_PROPERTIES:
	return cx18_vapi(cx, CX18_CPU_SET_AUDIO_PARAMETERS, 2,
	s->handle, data[0]);
	case CX2341X_ENC_MUTE_AUDIO:
	return cx18_vapi(cx, CX18_CPU_SET_AUDIO_MUTE, 2,
	s->handle, data[0]);
	case CX2341X_ENC_SET_BIT_RATE:
	return cx18_vapi(cx, CX18_CPU_SET_VIDEO_RATE, 5,
	s->handle, data[0], data[1], data[2], data[3]);
	case CX2341X_ENC_MUTE_VIDEO:
	return cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2,
	s->handle, data[0]);
	case CX2341X_ENC_SET_FRAME_DROP_RATE:
	return cx18_vapi(cx, CX18_CPU_SET_SKIP_INPUT_FRAME, 2,
	s->handle, data[0]);
	case CX2341X_ENC_MISC:
	return cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 4,
	s->handle, data[0], data[1], data[2]);
	case CX2341X_ENC_SET_DNR_FILTER_MODE:
	cx->filter_mode = (data[0] & 3) \| (data[1] << 2);
	return cx18_set_filter_param(s);
	case CX2341X_ENC_SET_DNR_FILTER_PROPS:
	cx->spatial_strength = data[0];
	cx->temporal_strength = data[1];
	return cx18_set_filter_param(s);
	case CX2341X_ENC_SET_SPATIAL_FILTER_TYPE:
	return cx18_vapi(cx, CX18_CPU_SET_SPATIAL_FILTER_TYPE, 3,
	s->handle, data[0], data[1]);
	case CX2341X_ENC_SET_CORING_LEVELS:
	return cx18_vapi(cx, CX18_CPU_SET_MEDIAN_CORING, 5,
	s->handle, data[0], data[1], data[2], data[3]);
	}
	CX18_WARN("Unknown cmd %x\n", cmd);
	return 0;
	}

	int cx18_vapi_result(struct cx18 *cx, u32 data[MAX_MB_ARGUMENTS],
	u32 cmd, int args, ...)
	{
	va_list ap;
	int i;

	va_start(ap, args);
	for (i = 0; i < args; i++)
	data[i] = va_arg(ap, u32);
	va_end(ap);
	return cx18_api(cx, cmd, args, data);
	}

	int cx18_vapi(struct cx18 *cx, u32 cmd, int args, ...)
	{
	u32 data[MAX_MB_ARGUMENTS];
	va_list ap;
	int i;

	if (cx == NULL) {
	CX18_ERR("cx == NULL (cmd=%x)\n", cmd);
	return 0;
	}
	if (args > MAX_MB_ARGUMENTS) {
	CX18_ERR("args too big (cmd=%x)\n", cmd);
	args = MAX_MB_ARGUMENTS;
	}
	va_start(ap, args);
	for (i = 0; i < args; i++)
	data[i] = va_arg(ap, u32);
	va_end(ap);
	return cx18_api(cx, cmd, args, data);
	}