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linuxdebug/drivers/media/platform/qcom/camss/camss-vfe.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0
/*
* camss-vfe.c
*
* Qualcomm MSM Camera Subsystem - VFE (Video Front End) Module
*
* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
* Copyright (C) 2015-2018 Linaro Ltd.
*/
#include <linux/clk.h>
#include <linux/completion.h>
#include <linux/interrupt.h>
#include <linux/iommu.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/spinlock_types.h>
#include <linux/spinlock.h>
#include <media/media-entity.h>
#include <media/v4l2-device.h>
#include <media/v4l2-subdev.h>
#include "camss-vfe.h"
#include "camss.h"
#define MSM_VFE_NAME "msm_vfe"
/* VFE reset timeout */
#define VFE_RESET_TIMEOUT_MS 50
#define SCALER_RATIO_MAX 16
struct vfe_format {
u32 code;
u8 bpp;
};
static const struct vfe_format formats_rdi_8x16[] = {
{ MEDIA_BUS_FMT_UYVY8_2X8, 8 },
{ MEDIA_BUS_FMT_VYUY8_2X8, 8 },
{ MEDIA_BUS_FMT_YUYV8_2X8, 8 },
{ MEDIA_BUS_FMT_YVYU8_2X8, 8 },
{ MEDIA_BUS_FMT_SBGGR8_1X8, 8 },
{ MEDIA_BUS_FMT_SGBRG8_1X8, 8 },
{ MEDIA_BUS_FMT_SGRBG8_1X8, 8 },
{ MEDIA_BUS_FMT_SRGGB8_1X8, 8 },
{ MEDIA_BUS_FMT_SBGGR10_1X10, 10 },
{ MEDIA_BUS_FMT_SGBRG10_1X10, 10 },
{ MEDIA_BUS_FMT_SGRBG10_1X10, 10 },
{ MEDIA_BUS_FMT_SRGGB10_1X10, 10 },
{ MEDIA_BUS_FMT_SBGGR12_1X12, 12 },
{ MEDIA_BUS_FMT_SGBRG12_1X12, 12 },
{ MEDIA_BUS_FMT_SGRBG12_1X12, 12 },
{ MEDIA_BUS_FMT_SRGGB12_1X12, 12 },
{ MEDIA_BUS_FMT_Y10_1X10, 10 },
};
static const struct vfe_format formats_pix_8x16[] = {
{ MEDIA_BUS_FMT_UYVY8_2X8, 8 },
{ MEDIA_BUS_FMT_VYUY8_2X8, 8 },
{ MEDIA_BUS_FMT_YUYV8_2X8, 8 },
{ MEDIA_BUS_FMT_YVYU8_2X8, 8 },
};
static const struct vfe_format formats_rdi_8x96[] = {
{ MEDIA_BUS_FMT_UYVY8_2X8, 8 },
{ MEDIA_BUS_FMT_VYUY8_2X8, 8 },
{ MEDIA_BUS_FMT_YUYV8_2X8, 8 },
{ MEDIA_BUS_FMT_YVYU8_2X8, 8 },
{ MEDIA_BUS_FMT_SBGGR8_1X8, 8 },
{ MEDIA_BUS_FMT_SGBRG8_1X8, 8 },
{ MEDIA_BUS_FMT_SGRBG8_1X8, 8 },
{ MEDIA_BUS_FMT_SRGGB8_1X8, 8 },
{ MEDIA_BUS_FMT_SBGGR10_1X10, 10 },
{ MEDIA_BUS_FMT_SGBRG10_1X10, 10 },
{ MEDIA_BUS_FMT_SGRBG10_1X10, 10 },
{ MEDIA_BUS_FMT_SRGGB10_1X10, 10 },
{ MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE, 16 },
{ MEDIA_BUS_FMT_SBGGR12_1X12, 12 },
{ MEDIA_BUS_FMT_SGBRG12_1X12, 12 },
{ MEDIA_BUS_FMT_SGRBG12_1X12, 12 },
{ MEDIA_BUS_FMT_SRGGB12_1X12, 12 },
{ MEDIA_BUS_FMT_SBGGR14_1X14, 14 },
{ MEDIA_BUS_FMT_SGBRG14_1X14, 14 },
{ MEDIA_BUS_FMT_SGRBG14_1X14, 14 },
{ MEDIA_BUS_FMT_SRGGB14_1X14, 14 },
{ MEDIA_BUS_FMT_Y10_1X10, 10 },
{ MEDIA_BUS_FMT_Y10_2X8_PADHI_LE, 16 },
};
static const struct vfe_format formats_pix_8x96[] = {
{ MEDIA_BUS_FMT_UYVY8_2X8, 8 },
{ MEDIA_BUS_FMT_VYUY8_2X8, 8 },
{ MEDIA_BUS_FMT_YUYV8_2X8, 8 },
{ MEDIA_BUS_FMT_YVYU8_2X8, 8 },
};
static const struct vfe_format formats_rdi_845[] = {
{ MEDIA_BUS_FMT_UYVY8_2X8, 8 },
{ MEDIA_BUS_FMT_VYUY8_2X8, 8 },
{ MEDIA_BUS_FMT_YUYV8_2X8, 8 },
{ MEDIA_BUS_FMT_YVYU8_2X8, 8 },
{ MEDIA_BUS_FMT_SBGGR8_1X8, 8 },
{ MEDIA_BUS_FMT_SGBRG8_1X8, 8 },
{ MEDIA_BUS_FMT_SGRBG8_1X8, 8 },
{ MEDIA_BUS_FMT_SRGGB8_1X8, 8 },
{ MEDIA_BUS_FMT_SBGGR10_1X10, 10 },
{ MEDIA_BUS_FMT_SGBRG10_1X10, 10 },
{ MEDIA_BUS_FMT_SGRBG10_1X10, 10 },
{ MEDIA_BUS_FMT_SRGGB10_1X10, 10 },
{ MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE, 16 },
{ MEDIA_BUS_FMT_SBGGR12_1X12, 12 },
{ MEDIA_BUS_FMT_SGBRG12_1X12, 12 },
{ MEDIA_BUS_FMT_SGRBG12_1X12, 12 },
{ MEDIA_BUS_FMT_SRGGB12_1X12, 12 },
{ MEDIA_BUS_FMT_SBGGR14_1X14, 14 },
{ MEDIA_BUS_FMT_SGBRG14_1X14, 14 },
{ MEDIA_BUS_FMT_SGRBG14_1X14, 14 },
{ MEDIA_BUS_FMT_SRGGB14_1X14, 14 },
{ MEDIA_BUS_FMT_Y8_1X8, 8 },
{ MEDIA_BUS_FMT_Y10_1X10, 10 },
{ MEDIA_BUS_FMT_Y10_2X8_PADHI_LE, 16 },
};
/*
* vfe_get_bpp - map media bus format to bits per pixel
* @formats: supported media bus formats array
* @nformats: size of @formats array
* @code: media bus format code
*
* Return number of bits per pixel
*/
static u8 vfe_get_bpp(const struct vfe_format *formats,
unsigned int nformats, u32 code)
{
unsigned int i;
for (i = 0; i < nformats; i++)
if (code == formats[i].code)
return formats[i].bpp;
WARN(1, "Unknown format\n");
return formats[0].bpp;
}
static u32 vfe_find_code(u32 *code, unsigned int n_code,
unsigned int index, u32 req_code)
{
int i;
if (!req_code && (index >= n_code))
return 0;
for (i = 0; i < n_code; i++)
if (req_code) {
if (req_code == code[i])
return req_code;
} else {
if (i == index)
return code[i];
}
return code[0];
}
static u32 vfe_src_pad_code(struct vfe_line *line, u32 sink_code,
unsigned int index, u32 src_req_code)
{
struct vfe_device *vfe = to_vfe(line);
if (vfe->camss->version == CAMSS_8x16)
switch (sink_code) {
case MEDIA_BUS_FMT_YUYV8_2X8:
{
u32 src_code[] = {
MEDIA_BUS_FMT_YUYV8_2X8,
MEDIA_BUS_FMT_YUYV8_1_5X8,
};
return vfe_find_code(src_code, ARRAY_SIZE(src_code),
index, src_req_code);
}
case MEDIA_BUS_FMT_YVYU8_2X8:
{
u32 src_code[] = {
MEDIA_BUS_FMT_YVYU8_2X8,
MEDIA_BUS_FMT_YVYU8_1_5X8,
};
return vfe_find_code(src_code, ARRAY_SIZE(src_code),
index, src_req_code);
}
case MEDIA_BUS_FMT_UYVY8_2X8:
{
u32 src_code[] = {
MEDIA_BUS_FMT_UYVY8_2X8,
MEDIA_BUS_FMT_UYVY8_1_5X8,
};
return vfe_find_code(src_code, ARRAY_SIZE(src_code),
index, src_req_code);
}
case MEDIA_BUS_FMT_VYUY8_2X8:
{
u32 src_code[] = {
MEDIA_BUS_FMT_VYUY8_2X8,
MEDIA_BUS_FMT_VYUY8_1_5X8,
};
return vfe_find_code(src_code, ARRAY_SIZE(src_code),
index, src_req_code);
}
default:
if (index > 0)
return 0;
return sink_code;
}
else if (vfe->camss->version == CAMSS_8x96 ||
vfe->camss->version == CAMSS_660 ||
vfe->camss->version == CAMSS_845 ||
vfe->camss->version == CAMSS_8250)
switch (sink_code) {
case MEDIA_BUS_FMT_YUYV8_2X8:
{
u32 src_code[] = {
MEDIA_BUS_FMT_YUYV8_2X8,
MEDIA_BUS_FMT_YVYU8_2X8,
MEDIA_BUS_FMT_UYVY8_2X8,
MEDIA_BUS_FMT_VYUY8_2X8,
MEDIA_BUS_FMT_YUYV8_1_5X8,
};
return vfe_find_code(src_code, ARRAY_SIZE(src_code),
index, src_req_code);
}
case MEDIA_BUS_FMT_YVYU8_2X8:
{
u32 src_code[] = {
MEDIA_BUS_FMT_YVYU8_2X8,
MEDIA_BUS_FMT_YUYV8_2X8,
MEDIA_BUS_FMT_UYVY8_2X8,
MEDIA_BUS_FMT_VYUY8_2X8,
MEDIA_BUS_FMT_YVYU8_1_5X8,
};
return vfe_find_code(src_code, ARRAY_SIZE(src_code),
index, src_req_code);
}
case MEDIA_BUS_FMT_UYVY8_2X8:
{
u32 src_code[] = {
MEDIA_BUS_FMT_UYVY8_2X8,
MEDIA_BUS_FMT_YUYV8_2X8,
MEDIA_BUS_FMT_YVYU8_2X8,
MEDIA_BUS_FMT_VYUY8_2X8,
MEDIA_BUS_FMT_UYVY8_1_5X8,
};
return vfe_find_code(src_code, ARRAY_SIZE(src_code),
index, src_req_code);
}
case MEDIA_BUS_FMT_VYUY8_2X8:
{
u32 src_code[] = {
MEDIA_BUS_FMT_VYUY8_2X8,
MEDIA_BUS_FMT_YUYV8_2X8,
MEDIA_BUS_FMT_YVYU8_2X8,
MEDIA_BUS_FMT_UYVY8_2X8,
MEDIA_BUS_FMT_VYUY8_1_5X8,
};
return vfe_find_code(src_code, ARRAY_SIZE(src_code),
index, src_req_code);
}
default:
if (index > 0)
return 0;
return sink_code;
}
else
return 0;
}
int vfe_reset(struct vfe_device *vfe)
{
unsigned long time;
reinit_completion(&vfe->reset_complete);
vfe->ops->global_reset(vfe);
time = wait_for_completion_timeout(&vfe->reset_complete,
msecs_to_jiffies(VFE_RESET_TIMEOUT_MS));
if (!time) {
dev_err(vfe->camss->dev, "VFE reset timeout\n");
return -EIO;
}
return 0;
}
static void vfe_init_outputs(struct vfe_device *vfe)
{
int i;
for (i = 0; i < vfe->line_num; i++) {
struct vfe_output *output = &vfe->line[i].output;
output->state = VFE_OUTPUT_OFF;
output->buf[0] = NULL;
output->buf[1] = NULL;
INIT_LIST_HEAD(&output->pending_bufs);
}
}
static void vfe_reset_output_maps(struct vfe_device *vfe)
{
int i;
for (i = 0; i < ARRAY_SIZE(vfe->wm_output_map); i++)
vfe->wm_output_map[i] = VFE_LINE_NONE;
}
int vfe_reserve_wm(struct vfe_device *vfe, enum vfe_line_id line_id)
{
int ret = -EBUSY;
int i;
for (i = 0; i < ARRAY_SIZE(vfe->wm_output_map); i++) {
if (vfe->wm_output_map[i] == VFE_LINE_NONE) {
vfe->wm_output_map[i] = line_id;
ret = i;
break;
}
}
return ret;
}
int vfe_release_wm(struct vfe_device *vfe, u8 wm)
{
if (wm >= ARRAY_SIZE(vfe->wm_output_map))
return -EINVAL;
vfe->wm_output_map[wm] = VFE_LINE_NONE;
return 0;
}
struct camss_buffer *vfe_buf_get_pending(struct vfe_output *output)
{
struct camss_buffer *buffer = NULL;
if (!list_empty(&output->pending_bufs)) {
buffer = list_first_entry(&output->pending_bufs,
struct camss_buffer,
queue);
list_del(&buffer->queue);
}
return buffer;
}
void vfe_buf_add_pending(struct vfe_output *output,
struct camss_buffer *buffer)
{
INIT_LIST_HEAD(&buffer->queue);
list_add_tail(&buffer->queue, &output->pending_bufs);
}
/*
* vfe_buf_flush_pending - Flush all pending buffers.
* @output: VFE output
* @state: vb2 buffer state
*/
static void vfe_buf_flush_pending(struct vfe_output *output,
enum vb2_buffer_state state)
{
struct camss_buffer *buf;
struct camss_buffer *t;
list_for_each_entry_safe(buf, t, &output->pending_bufs, queue) {
vb2_buffer_done(&buf->vb.vb2_buf, state);
list_del(&buf->queue);
}
}
int vfe_put_output(struct vfe_line *line)
{
struct vfe_device *vfe = to_vfe(line);
struct vfe_output *output = &line->output;
unsigned long flags;
unsigned int i;
spin_lock_irqsave(&vfe->output_lock, flags);
for (i = 0; i < output->wm_num; i++)
vfe_release_wm(vfe, output->wm_idx[i]);
output->state = VFE_OUTPUT_OFF;
spin_unlock_irqrestore(&vfe->output_lock, flags);
return 0;
}
/**
* vfe_isr_comp_done() - Process composite image done interrupt
* @vfe: VFE Device
* @comp: Composite image id
*/
void vfe_isr_comp_done(struct vfe_device *vfe, u8 comp)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(vfe->wm_output_map); i++)
if (vfe->wm_output_map[i] == VFE_LINE_PIX) {
vfe->isr_ops.wm_done(vfe, i);
break;
}
}
void vfe_isr_reset_ack(struct vfe_device *vfe)
{
complete(&vfe->reset_complete);
}
/*
* vfe_set_clock_rates - Calculate and set clock rates on VFE module
* @vfe: VFE device
*
* Return 0 on success or a negative error code otherwise
*/
static int vfe_set_clock_rates(struct vfe_device *vfe)
{
struct device *dev = vfe->camss->dev;
u64 pixel_clock[VFE_LINE_NUM_MAX];
int i, j;
int ret;
for (i = VFE_LINE_RDI0; i < vfe->line_num; i++) {
ret = camss_get_pixel_clock(&vfe->line[i].subdev.entity,
&pixel_clock[i]);
if (ret)
pixel_clock[i] = 0;
}
for (i = 0; i < vfe->nclocks; i++) {
struct camss_clock *clock = &vfe->clock[i];
if (!strcmp(clock->name, "vfe0") ||
!strcmp(clock->name, "vfe1") ||
!strcmp(clock->name, "vfe_lite")) {
u64 min_rate = 0;
long rate;
for (j = VFE_LINE_RDI0; j < vfe->line_num; j++) {
u32 tmp;
u8 bpp;
if (j == VFE_LINE_PIX) {
tmp = pixel_clock[j];
} else {
struct vfe_line *l = &vfe->line[j];
bpp = vfe_get_bpp(l->formats,
l->nformats,
l->fmt[MSM_VFE_PAD_SINK].code);
tmp = pixel_clock[j] * bpp / 64;
}
if (min_rate < tmp)
min_rate = tmp;
}
camss_add_clock_margin(&min_rate);
for (j = 0; j < clock->nfreqs; j++)
if (min_rate < clock->freq[j])
break;
if (j == clock->nfreqs) {
dev_err(dev,
"Pixel clock is too high for VFE");
return -EINVAL;
}
/* if sensor pixel clock is not available */
/* set highest possible VFE clock rate */
if (min_rate == 0)
j = clock->nfreqs - 1;
rate = clk_round_rate(clock->clk, clock->freq[j]);
if (rate < 0) {
dev_err(dev, "clk round rate failed: %ld\n",
rate);
return -EINVAL;
}
ret = clk_set_rate(clock->clk, rate);
if (ret < 0) {
dev_err(dev, "clk set rate failed: %d\n", ret);
return ret;
}
}
}
return 0;
}
/*
* vfe_check_clock_rates - Check current clock rates on VFE module
* @vfe: VFE device
*
* Return 0 if current clock rates are suitable for a new pipeline
* or a negative error code otherwise
*/
static int vfe_check_clock_rates(struct vfe_device *vfe)
{
u64 pixel_clock[VFE_LINE_NUM_MAX];
int i, j;
int ret;
for (i = VFE_LINE_RDI0; i < vfe->line_num; i++) {
ret = camss_get_pixel_clock(&vfe->line[i].subdev.entity,
&pixel_clock[i]);
if (ret)
pixel_clock[i] = 0;
}
for (i = 0; i < vfe->nclocks; i++) {
struct camss_clock *clock = &vfe->clock[i];
if (!strcmp(clock->name, "vfe0") ||
!strcmp(clock->name, "vfe1")) {
u64 min_rate = 0;
unsigned long rate;
for (j = VFE_LINE_RDI0; j < vfe->line_num; j++) {
u32 tmp;
u8 bpp;
if (j == VFE_LINE_PIX) {
tmp = pixel_clock[j];
} else {
struct vfe_line *l = &vfe->line[j];
bpp = vfe_get_bpp(l->formats,
l->nformats,
l->fmt[MSM_VFE_PAD_SINK].code);
tmp = pixel_clock[j] * bpp / 64;
}
if (min_rate < tmp)
min_rate = tmp;
}
camss_add_clock_margin(&min_rate);
rate = clk_get_rate(clock->clk);
if (rate < min_rate)
return -EBUSY;
}
}
return 0;
}
/*
* vfe_get - Power up and reset VFE module
* @vfe: VFE Device
*
* Return 0 on success or a negative error code otherwise
*/
int vfe_get(struct vfe_device *vfe)
{
int ret;
mutex_lock(&vfe->power_lock);
if (vfe->power_count == 0) {
ret = vfe->ops->pm_domain_on(vfe);
if (ret < 0)
goto error_pm_domain;
ret = pm_runtime_resume_and_get(vfe->camss->dev);
if (ret < 0)
goto error_domain_off;
ret = vfe_set_clock_rates(vfe);
if (ret < 0)
goto error_pm_runtime_get;
ret = camss_enable_clocks(vfe->nclocks, vfe->clock,
vfe->camss->dev);
if (ret < 0)
goto error_pm_runtime_get;
ret = vfe_reset(vfe);
if (ret < 0)
goto error_reset;
vfe_reset_output_maps(vfe);
vfe_init_outputs(vfe);
vfe->ops->hw_version(vfe);
} else {
ret = vfe_check_clock_rates(vfe);
if (ret < 0)
goto error_pm_runtime_get;
}
vfe->power_count++;
mutex_unlock(&vfe->power_lock);
return 0;
error_reset:
camss_disable_clocks(vfe->nclocks, vfe->clock);
error_pm_runtime_get:
pm_runtime_put_sync(vfe->camss->dev);
error_domain_off:
vfe->ops->pm_domain_off(vfe);
error_pm_domain:
mutex_unlock(&vfe->power_lock);
return ret;
}
/*
* vfe_put - Power down VFE module
* @vfe: VFE Device
*/
void vfe_put(struct vfe_device *vfe)
{
mutex_lock(&vfe->power_lock);
if (vfe->power_count == 0) {
dev_err(vfe->camss->dev, "vfe power off on power_count == 0\n");
goto exit;
} else if (vfe->power_count == 1) {
if (vfe->was_streaming) {
vfe->was_streaming = 0;
vfe->ops->vfe_halt(vfe);
}
camss_disable_clocks(vfe->nclocks, vfe->clock);
pm_runtime_put_sync(vfe->camss->dev);
vfe->ops->pm_domain_off(vfe);
}
vfe->power_count--;
exit:
mutex_unlock(&vfe->power_lock);
}
/*
* vfe_flush_buffers - Return all vb2 buffers
* @vid: Video device structure
* @state: vb2 buffer state of the returned buffers
*
* Return all buffers to vb2. This includes queued pending buffers (still
* unused) and any buffers given to the hardware but again still not used.
*
* Return 0 on success or a negative error code otherwise
*/
int vfe_flush_buffers(struct camss_video *vid,
enum vb2_buffer_state state)
{
struct vfe_line *line = container_of(vid, struct vfe_line, video_out);
struct vfe_device *vfe = to_vfe(line);
struct vfe_output *output;
unsigned long flags;
output = &line->output;
spin_lock_irqsave(&vfe->output_lock, flags);
vfe_buf_flush_pending(output, state);
if (output->buf[0])
vb2_buffer_done(&output->buf[0]->vb.vb2_buf, state);
if (output->buf[1])
vb2_buffer_done(&output->buf[1]->vb.vb2_buf, state);
if (output->last_buffer) {
vb2_buffer_done(&output->last_buffer->vb.vb2_buf, state);
output->last_buffer = NULL;
}
spin_unlock_irqrestore(&vfe->output_lock, flags);
return 0;
}
/*
* vfe_set_power - Power on/off VFE module
* @sd: VFE V4L2 subdevice
* @on: Requested power state
*
* Return 0 on success or a negative error code otherwise
*/
static int vfe_set_power(struct v4l2_subdev *sd, int on)
{
struct vfe_line *line = v4l2_get_subdevdata(sd);
struct vfe_device *vfe = to_vfe(line);
int ret;
if (on) {
ret = vfe_get(vfe);
if (ret < 0)
return ret;
} else {
vfe_put(vfe);
}
return 0;
}
/*
* vfe_set_stream - Enable/disable streaming on VFE module
* @sd: VFE V4L2 subdevice
* @enable: Requested streaming state
*
* Main configuration of VFE module is triggered here.
*
* Return 0 on success or a negative error code otherwise
*/
static int vfe_set_stream(struct v4l2_subdev *sd, int enable)
{
struct vfe_line *line = v4l2_get_subdevdata(sd);
struct vfe_device *vfe = to_vfe(line);
int ret;
if (enable) {
ret = vfe->ops->vfe_enable(line);
if (ret < 0)
dev_err(vfe->camss->dev,
"Failed to enable vfe outputs\n");
} else {
ret = vfe->ops->vfe_disable(line);
if (ret < 0)
dev_err(vfe->camss->dev,
"Failed to disable vfe outputs\n");
}
return ret;
}
/*
* __vfe_get_format - Get pointer to format structure
* @line: VFE line
* @cfg: V4L2 subdev pad configuration
* @pad: pad from which format is requested
* @which: TRY or ACTIVE format
*
* Return pointer to TRY or ACTIVE format structure
*/
static struct v4l2_mbus_framefmt *
__vfe_get_format(struct vfe_line *line,
struct v4l2_subdev_state *sd_state,
unsigned int pad,
enum v4l2_subdev_format_whence which)
{
if (which == V4L2_SUBDEV_FORMAT_TRY)
return v4l2_subdev_get_try_format(&line->subdev, sd_state,
pad);
return &line->fmt[pad];
}
/*
* __vfe_get_compose - Get pointer to compose selection structure
* @line: VFE line
* @cfg: V4L2 subdev pad configuration
* @which: TRY or ACTIVE format
*
* Return pointer to TRY or ACTIVE compose rectangle structure
*/
static struct v4l2_rect *
__vfe_get_compose(struct vfe_line *line,
struct v4l2_subdev_state *sd_state,
enum v4l2_subdev_format_whence which)
{
if (which == V4L2_SUBDEV_FORMAT_TRY)
return v4l2_subdev_get_try_compose(&line->subdev, sd_state,
MSM_VFE_PAD_SINK);
return &line->compose;
}
/*
* __vfe_get_crop - Get pointer to crop selection structure
* @line: VFE line
* @cfg: V4L2 subdev pad configuration
* @which: TRY or ACTIVE format
*
* Return pointer to TRY or ACTIVE crop rectangle structure
*/
static struct v4l2_rect *
__vfe_get_crop(struct vfe_line *line,
struct v4l2_subdev_state *sd_state,
enum v4l2_subdev_format_whence which)
{
if (which == V4L2_SUBDEV_FORMAT_TRY)
return v4l2_subdev_get_try_crop(&line->subdev, sd_state,
MSM_VFE_PAD_SRC);
return &line->crop;
}
/*
* vfe_try_format - Handle try format by pad subdev method
* @line: VFE line
* @cfg: V4L2 subdev pad configuration
* @pad: pad on which format is requested
* @fmt: pointer to v4l2 format structure
* @which: wanted subdev format
*/
static void vfe_try_format(struct vfe_line *line,
struct v4l2_subdev_state *sd_state,
unsigned int pad,
struct v4l2_mbus_framefmt *fmt,
enum v4l2_subdev_format_whence which)
{
unsigned int i;
u32 code;
switch (pad) {
case MSM_VFE_PAD_SINK:
/* Set format on sink pad */
for (i = 0; i < line->nformats; i++)
if (fmt->code == line->formats[i].code)
break;
/* If not found, use UYVY as default */
if (i >= line->nformats)
fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
fmt->width = clamp_t(u32, fmt->width, 1, 8191);
fmt->height = clamp_t(u32, fmt->height, 1, 8191);
fmt->field = V4L2_FIELD_NONE;
fmt->colorspace = V4L2_COLORSPACE_SRGB;
break;
case MSM_VFE_PAD_SRC:
/* Set and return a format same as sink pad */
code = fmt->code;
*fmt = *__vfe_get_format(line, sd_state, MSM_VFE_PAD_SINK,
which);
fmt->code = vfe_src_pad_code(line, fmt->code, 0, code);
if (line->id == VFE_LINE_PIX) {
struct v4l2_rect *rect;
rect = __vfe_get_crop(line, sd_state, which);
fmt->width = rect->width;
fmt->height = rect->height;
}
break;
}
fmt->colorspace = V4L2_COLORSPACE_SRGB;
}
/*
* vfe_try_compose - Handle try compose selection by pad subdev method
* @line: VFE line
* @cfg: V4L2 subdev pad configuration
* @rect: pointer to v4l2 rect structure
* @which: wanted subdev format
*/
static void vfe_try_compose(struct vfe_line *line,
struct v4l2_subdev_state *sd_state,
struct v4l2_rect *rect,
enum v4l2_subdev_format_whence which)
{
struct v4l2_mbus_framefmt *fmt;
fmt = __vfe_get_format(line, sd_state, MSM_VFE_PAD_SINK, which);
if (rect->width > fmt->width)
rect->width = fmt->width;
if (rect->height > fmt->height)
rect->height = fmt->height;
if (fmt->width > rect->width * SCALER_RATIO_MAX)
rect->width = (fmt->width + SCALER_RATIO_MAX - 1) /
SCALER_RATIO_MAX;
rect->width &= ~0x1;
if (fmt->height > rect->height * SCALER_RATIO_MAX)
rect->height = (fmt->height + SCALER_RATIO_MAX - 1) /
SCALER_RATIO_MAX;
if (rect->width < 16)
rect->width = 16;
if (rect->height < 4)
rect->height = 4;
}
/*
* vfe_try_crop - Handle try crop selection by pad subdev method
* @line: VFE line
* @cfg: V4L2 subdev pad configuration
* @rect: pointer to v4l2 rect structure
* @which: wanted subdev format
*/
static void vfe_try_crop(struct vfe_line *line,
struct v4l2_subdev_state *sd_state,
struct v4l2_rect *rect,
enum v4l2_subdev_format_whence which)
{
struct v4l2_rect *compose;
compose = __vfe_get_compose(line, sd_state, which);
if (rect->width > compose->width)
rect->width = compose->width;
if (rect->width + rect->left > compose->width)
rect->left = compose->width - rect->width;
if (rect->height > compose->height)
rect->height = compose->height;
if (rect->height + rect->top > compose->height)
rect->top = compose->height - rect->height;
/* wm in line based mode writes multiple of 16 horizontally */
rect->left += (rect->width & 0xf) >> 1;
rect->width &= ~0xf;
if (rect->width < 16) {
rect->left = 0;
rect->width = 16;
}
if (rect->height < 4) {
rect->top = 0;
rect->height = 4;
}
}
/*
* vfe_enum_mbus_code - Handle pixel format enumeration
* @sd: VFE V4L2 subdevice
* @cfg: V4L2 subdev pad configuration
* @code: pointer to v4l2_subdev_mbus_code_enum structure
*
* return -EINVAL or zero on success
*/
static int vfe_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
struct vfe_line *line = v4l2_get_subdevdata(sd);
if (code->pad == MSM_VFE_PAD_SINK) {
if (code->index >= line->nformats)
return -EINVAL;
code->code = line->formats[code->index].code;
} else {
struct v4l2_mbus_framefmt *sink_fmt;
sink_fmt = __vfe_get_format(line, sd_state, MSM_VFE_PAD_SINK,
code->which);
code->code = vfe_src_pad_code(line, sink_fmt->code,
code->index, 0);
if (!code->code)
return -EINVAL;
}
return 0;
}
/*
* vfe_enum_frame_size - Handle frame size enumeration
* @sd: VFE V4L2 subdevice
* @cfg: V4L2 subdev pad configuration
* @fse: pointer to v4l2_subdev_frame_size_enum structure
*
* Return -EINVAL or zero on success
*/
static int vfe_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
struct vfe_line *line = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt format;
if (fse->index != 0)
return -EINVAL;
format.code = fse->code;
format.width = 1;
format.height = 1;
vfe_try_format(line, sd_state, fse->pad, &format, fse->which);
fse->min_width = format.width;
fse->min_height = format.height;
if (format.code != fse->code)
return -EINVAL;
format.code = fse->code;
format.width = -1;
format.height = -1;
vfe_try_format(line, sd_state, fse->pad, &format, fse->which);
fse->max_width = format.width;
fse->max_height = format.height;
return 0;
}
/*
* vfe_get_format - Handle get format by pads subdev method
* @sd: VFE V4L2 subdevice
* @cfg: V4L2 subdev pad configuration
* @fmt: pointer to v4l2 subdev format structure
*
* Return -EINVAL or zero on success
*/
static int vfe_get_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct vfe_line *line = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *format;
format = __vfe_get_format(line, sd_state, fmt->pad, fmt->which);
if (format == NULL)
return -EINVAL;
fmt->format = *format;
return 0;
}
static int vfe_set_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel);
/*
* vfe_set_format - Handle set format by pads subdev method
* @sd: VFE V4L2 subdevice
* @cfg: V4L2 subdev pad configuration
* @fmt: pointer to v4l2 subdev format structure
*
* Return -EINVAL or zero on success
*/
static int vfe_set_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct vfe_line *line = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *format;
format = __vfe_get_format(line, sd_state, fmt->pad, fmt->which);
if (format == NULL)
return -EINVAL;
vfe_try_format(line, sd_state, fmt->pad, &fmt->format, fmt->which);
*format = fmt->format;
if (fmt->pad == MSM_VFE_PAD_SINK) {
struct v4l2_subdev_selection sel = { 0 };
int ret;
/* Propagate the format from sink to source */
format = __vfe_get_format(line, sd_state, MSM_VFE_PAD_SRC,
fmt->which);
*format = fmt->format;
vfe_try_format(line, sd_state, MSM_VFE_PAD_SRC, format,
fmt->which);
if (line->id != VFE_LINE_PIX)
return 0;
/* Reset sink pad compose selection */
sel.which = fmt->which;
sel.pad = MSM_VFE_PAD_SINK;
sel.target = V4L2_SEL_TGT_COMPOSE;
sel.r.width = fmt->format.width;
sel.r.height = fmt->format.height;
ret = vfe_set_selection(sd, sd_state, &sel);
if (ret < 0)
return ret;
}
return 0;
}
/*
* vfe_get_selection - Handle get selection by pads subdev method
* @sd: VFE V4L2 subdevice
* @cfg: V4L2 subdev pad configuration
* @sel: pointer to v4l2 subdev selection structure
*
* Return -EINVAL or zero on success
*/
static int vfe_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
struct vfe_line *line = v4l2_get_subdevdata(sd);
struct v4l2_subdev_format fmt = { 0 };
struct v4l2_rect *rect;
int ret;
if (line->id != VFE_LINE_PIX)
return -EINVAL;
if (sel->pad == MSM_VFE_PAD_SINK)
switch (sel->target) {
case V4L2_SEL_TGT_COMPOSE_BOUNDS:
fmt.pad = sel->pad;
fmt.which = sel->which;
ret = vfe_get_format(sd, sd_state, &fmt);
if (ret < 0)
return ret;
sel->r.left = 0;
sel->r.top = 0;
sel->r.width = fmt.format.width;
sel->r.height = fmt.format.height;
break;
case V4L2_SEL_TGT_COMPOSE:
rect = __vfe_get_compose(line, sd_state, sel->which);
if (rect == NULL)
return -EINVAL;
sel->r = *rect;
break;
default:
return -EINVAL;
}
else if (sel->pad == MSM_VFE_PAD_SRC)
switch (sel->target) {
case V4L2_SEL_TGT_CROP_BOUNDS:
rect = __vfe_get_compose(line, sd_state, sel->which);
if (rect == NULL)
return -EINVAL;
sel->r.left = rect->left;
sel->r.top = rect->top;
sel->r.width = rect->width;
sel->r.height = rect->height;
break;
case V4L2_SEL_TGT_CROP:
rect = __vfe_get_crop(line, sd_state, sel->which);
if (rect == NULL)
return -EINVAL;
sel->r = *rect;
break;
default:
return -EINVAL;
}
return 0;
}
/*
* vfe_set_selection - Handle set selection by pads subdev method
* @sd: VFE V4L2 subdevice
* @cfg: V4L2 subdev pad configuration
* @sel: pointer to v4l2 subdev selection structure
*
* Return -EINVAL or zero on success
*/
static int vfe_set_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
struct vfe_line *line = v4l2_get_subdevdata(sd);
struct v4l2_rect *rect;
int ret;
if (line->id != VFE_LINE_PIX)
return -EINVAL;
if (sel->target == V4L2_SEL_TGT_COMPOSE &&
sel->pad == MSM_VFE_PAD_SINK) {
struct v4l2_subdev_selection crop = { 0 };
rect = __vfe_get_compose(line, sd_state, sel->which);
if (rect == NULL)
return -EINVAL;
vfe_try_compose(line, sd_state, &sel->r, sel->which);
*rect = sel->r;
/* Reset source crop selection */
crop.which = sel->which;
crop.pad = MSM_VFE_PAD_SRC;
crop.target = V4L2_SEL_TGT_CROP;
crop.r = *rect;
ret = vfe_set_selection(sd, sd_state, &crop);
} else if (sel->target == V4L2_SEL_TGT_CROP &&
sel->pad == MSM_VFE_PAD_SRC) {
struct v4l2_subdev_format fmt = { 0 };
rect = __vfe_get_crop(line, sd_state, sel->which);
if (rect == NULL)
return -EINVAL;
vfe_try_crop(line, sd_state, &sel->r, sel->which);
*rect = sel->r;
/* Reset source pad format width and height */
fmt.which = sel->which;
fmt.pad = MSM_VFE_PAD_SRC;
ret = vfe_get_format(sd, sd_state, &fmt);
if (ret < 0)
return ret;
fmt.format.width = rect->width;
fmt.format.height = rect->height;
ret = vfe_set_format(sd, sd_state, &fmt);
} else {
ret = -EINVAL;
}
return ret;
}
/*
* vfe_init_formats - Initialize formats on all pads
* @sd: VFE V4L2 subdevice
* @fh: V4L2 subdev file handle
*
* Initialize all pad formats with default values.
*
* Return 0 on success or a negative error code otherwise
*/
static int vfe_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
struct v4l2_subdev_format format = {
.pad = MSM_VFE_PAD_SINK,
.which = fh ? V4L2_SUBDEV_FORMAT_TRY :
V4L2_SUBDEV_FORMAT_ACTIVE,
.format = {
.code = MEDIA_BUS_FMT_UYVY8_2X8,
.width = 1920,
.height = 1080
}
};
return vfe_set_format(sd, fh ? fh->state : NULL, &format);
}
/*
* msm_vfe_subdev_init - Initialize VFE device structure and resources
* @vfe: VFE device
* @res: VFE module resources table
*
* Return 0 on success or a negative error code otherwise
*/
int msm_vfe_subdev_init(struct camss *camss, struct vfe_device *vfe,
const struct resources *res, u8 id)
{
struct device *dev = camss->dev;
struct platform_device *pdev = to_platform_device(dev);
int i, j;
int ret;
switch (camss->version) {
case CAMSS_8x16:
vfe->ops = &vfe_ops_4_1;
break;
case CAMSS_8x96:
vfe->ops = &vfe_ops_4_7;
break;
case CAMSS_660:
vfe->ops = &vfe_ops_4_8;
break;
case CAMSS_845:
vfe->ops = &vfe_ops_170;
break;
case CAMSS_8250:
vfe->ops = &vfe_ops_480;
break;
default:
return -EINVAL;
}
vfe->ops->subdev_init(dev, vfe);
/* Memory */
vfe->base = devm_platform_ioremap_resource_byname(pdev, res->reg[0]);
if (IS_ERR(vfe->base)) {
dev_err(dev, "could not map memory\n");
return PTR_ERR(vfe->base);
}
/* Interrupt */
ret = platform_get_irq_byname(pdev, res->interrupt[0]);
if (ret < 0)
return ret;
vfe->irq = ret;
snprintf(vfe->irq_name, sizeof(vfe->irq_name), "%s_%s%d",
dev_name(dev), MSM_VFE_NAME, id);
ret = devm_request_irq(dev, vfe->irq, vfe->ops->isr,
IRQF_TRIGGER_RISING, vfe->irq_name, vfe);
if (ret < 0) {
dev_err(dev, "request_irq failed: %d\n", ret);
return ret;
}
/* Clocks */
vfe->nclocks = 0;
while (res->clock[vfe->nclocks])
vfe->nclocks++;
vfe->clock = devm_kcalloc(dev, vfe->nclocks, sizeof(*vfe->clock),
GFP_KERNEL);
if (!vfe->clock)
return -ENOMEM;
for (i = 0; i < vfe->nclocks; i++) {
struct camss_clock *clock = &vfe->clock[i];
clock->clk = devm_clk_get(dev, res->clock[i]);
if (IS_ERR(clock->clk))
return PTR_ERR(clock->clk);
clock->name = res->clock[i];
clock->nfreqs = 0;
while (res->clock_rate[i][clock->nfreqs])
clock->nfreqs++;
if (!clock->nfreqs) {
clock->freq = NULL;
continue;
}
clock->freq = devm_kcalloc(dev,
clock->nfreqs,
sizeof(*clock->freq),
GFP_KERNEL);
if (!clock->freq)
return -ENOMEM;
for (j = 0; j < clock->nfreqs; j++)
clock->freq[j] = res->clock_rate[i][j];
}
mutex_init(&vfe->power_lock);
vfe->power_count = 0;
mutex_init(&vfe->stream_lock);
vfe->stream_count = 0;
spin_lock_init(&vfe->output_lock);
vfe->camss = camss;
vfe->id = id;
vfe->reg_update = 0;
for (i = VFE_LINE_RDI0; i < vfe->line_num; i++) {
struct vfe_line *l = &vfe->line[i];
l->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
l->video_out.camss = camss;
l->id = i;
init_completion(&l->output.sof);
init_completion(&l->output.reg_update);
if (camss->version == CAMSS_8x16) {
if (i == VFE_LINE_PIX) {
l->formats = formats_pix_8x16;
l->nformats = ARRAY_SIZE(formats_pix_8x16);
} else {
l->formats = formats_rdi_8x16;
l->nformats = ARRAY_SIZE(formats_rdi_8x16);
}
} else if (camss->version == CAMSS_8x96 ||
camss->version == CAMSS_660) {
if (i == VFE_LINE_PIX) {
l->formats = formats_pix_8x96;
l->nformats = ARRAY_SIZE(formats_pix_8x96);
} else {
l->formats = formats_rdi_8x96;
l->nformats = ARRAY_SIZE(formats_rdi_8x96);
}
} else if (camss->version == CAMSS_845 ||
camss->version == CAMSS_8250) {
l->formats = formats_rdi_845;
l->nformats = ARRAY_SIZE(formats_rdi_845);
} else {
return -EINVAL;
}
}
init_completion(&vfe->reset_complete);
init_completion(&vfe->halt_complete);
return 0;
}
/*
* vfe_link_setup - Setup VFE connections
* @entity: Pointer to media entity structure
* @local: Pointer to local pad
* @remote: Pointer to remote pad
* @flags: Link flags
*
* Return 0 on success
*/
static int vfe_link_setup(struct media_entity *entity,
const struct media_pad *local,
const struct media_pad *remote, u32 flags)
{
if (flags & MEDIA_LNK_FL_ENABLED)
if (media_pad_remote_pad_first(local))
return -EBUSY;
return 0;
}
static const struct v4l2_subdev_core_ops vfe_core_ops = {
.s_power = vfe_set_power,
};
static const struct v4l2_subdev_video_ops vfe_video_ops = {
.s_stream = vfe_set_stream,
};
static const struct v4l2_subdev_pad_ops vfe_pad_ops = {
.enum_mbus_code = vfe_enum_mbus_code,
.enum_frame_size = vfe_enum_frame_size,
.get_fmt = vfe_get_format,
.set_fmt = vfe_set_format,
.get_selection = vfe_get_selection,
.set_selection = vfe_set_selection,
};
static const struct v4l2_subdev_ops vfe_v4l2_ops = {
.core = &vfe_core_ops,
.video = &vfe_video_ops,
.pad = &vfe_pad_ops,
};
static const struct v4l2_subdev_internal_ops vfe_v4l2_internal_ops = {
.open = vfe_init_formats,
};
static const struct media_entity_operations vfe_media_ops = {
.link_setup = vfe_link_setup,
.link_validate = v4l2_subdev_link_validate,
};
/*
* msm_vfe_register_entities - Register subdev node for VFE module
* @vfe: VFE device
* @v4l2_dev: V4L2 device
*
* Initialize and register a subdev node for the VFE module. Then
* call msm_video_register() to register the video device node which
* will be connected to this subdev node. Then actually create the
* media link between them.
*
* Return 0 on success or a negative error code otherwise
*/
int msm_vfe_register_entities(struct vfe_device *vfe,
struct v4l2_device *v4l2_dev)
{
struct device *dev = vfe->camss->dev;
struct v4l2_subdev *sd;
struct media_pad *pads;
struct camss_video *video_out;
int ret;
int i;
for (i = 0; i < vfe->line_num; i++) {
char name[32];
sd = &vfe->line[i].subdev;
pads = vfe->line[i].pads;
video_out = &vfe->line[i].video_out;
v4l2_subdev_init(sd, &vfe_v4l2_ops);
sd->internal_ops = &vfe_v4l2_internal_ops;
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
if (i == VFE_LINE_PIX)
snprintf(sd->name, ARRAY_SIZE(sd->name), "%s%d_%s",
MSM_VFE_NAME, vfe->id, "pix");
else
snprintf(sd->name, ARRAY_SIZE(sd->name), "%s%d_%s%d",
MSM_VFE_NAME, vfe->id, "rdi", i);
v4l2_set_subdevdata(sd, &vfe->line[i]);
ret = vfe_init_formats(sd, NULL);
if (ret < 0) {
dev_err(dev, "Failed to init format: %d\n", ret);
goto error_init;
}
pads[MSM_VFE_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
pads[MSM_VFE_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE;
sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
sd->entity.ops = &vfe_media_ops;
ret = media_entity_pads_init(&sd->entity, MSM_VFE_PADS_NUM,
pads);
if (ret < 0) {
dev_err(dev, "Failed to init media entity: %d\n", ret);
goto error_init;
}
ret = v4l2_device_register_subdev(v4l2_dev, sd);
if (ret < 0) {
dev_err(dev, "Failed to register subdev: %d\n", ret);
goto error_reg_subdev;
}
video_out->ops = &vfe->video_ops;
if (vfe->camss->version == CAMSS_845 ||
vfe->camss->version == CAMSS_8250)
video_out->bpl_alignment = 16;
else
video_out->bpl_alignment = 8;
video_out->line_based = 0;
if (i == VFE_LINE_PIX) {
video_out->bpl_alignment = 16;
video_out->line_based = 1;
}
snprintf(name, ARRAY_SIZE(name), "%s%d_%s%d",
MSM_VFE_NAME, vfe->id, "video", i);
ret = msm_video_register(video_out, v4l2_dev, name,
i == VFE_LINE_PIX ? 1 : 0);
if (ret < 0) {
dev_err(dev, "Failed to register video node: %d\n",
ret);
goto error_reg_video;
}
ret = media_create_pad_link(
&sd->entity, MSM_VFE_PAD_SRC,
&video_out->vdev.entity, 0,
MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED);
if (ret < 0) {
dev_err(dev, "Failed to link %s->%s entities: %d\n",
sd->entity.name, video_out->vdev.entity.name,
ret);
goto error_link;
}
}
return 0;
error_link:
msm_video_unregister(video_out);
error_reg_video:
v4l2_device_unregister_subdev(sd);
error_reg_subdev:
media_entity_cleanup(&sd->entity);
error_init:
for (i--; i >= 0; i--) {
sd = &vfe->line[i].subdev;
video_out = &vfe->line[i].video_out;
msm_video_unregister(video_out);
v4l2_device_unregister_subdev(sd);
media_entity_cleanup(&sd->entity);
}
return ret;
}
/*
* msm_vfe_unregister_entities - Unregister VFE module subdev node
* @vfe: VFE device
*/
void msm_vfe_unregister_entities(struct vfe_device *vfe)
{
int i;
mutex_destroy(&vfe->power_lock);
mutex_destroy(&vfe->stream_lock);
for (i = 0; i < vfe->line_num; i++) {
struct v4l2_subdev *sd = &vfe->line[i].subdev;
struct camss_video *video_out = &vfe->line[i].video_out;
msm_video_unregister(video_out);
v4l2_device_unregister_subdev(sd);
media_entity_cleanup(&sd->entity);
}
}