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camss-vfe.c
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camss-vfe.c
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// 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) {
line->output.state = VFE_OUTPUT_RESERVED;
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