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media: sun6i: Add support for Allwinner CSI V3s 

Allwinner V3s SoC features a CSI module with parallel interface.

This patch implement a v4l2 framework driver for it.

Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Maxime Ripard <maxime.ripard@bootlin.com>
Tested-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Yong Deng <yong.deng@magewell.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Yong Deng 2018-10-30 04:18:10 -04:00 committed by Mauro Carvalho Chehab
parent d959c40f37
commit 5cc7522d89
9 changed files with 1974 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/media/platform/Kconfig
View File

@ -138,6 +138,7 @@ source "drivers/media/platform/am437x/Kconfig"
source "drivers/media/platform/xilinx/Kconfig"
source "drivers/media/platform/rcar-vin/Kconfig"
source "drivers/media/platform/atmel/Kconfig"
source "drivers/media/platform/sunxi/sun6i-csi/Kconfig"
config VIDEO_TI_CAL
tristate "TI CAL (Camera Adaptation Layer) driver"

2
drivers/media/platform/Makefile
View File

@ -100,3 +100,5 @@ obj-$(CONFIG_VIDEO_QCOM_VENUS) += qcom/venus/
obj-y += meson/
obj-y += cros-ec-cec/
obj-$(CONFIG_VIDEO_SUN6I_CSI) += sunxi/sun6i-csi/

9
drivers/media/platform/sunxi/sun6i-csi/Kconfig Normal file
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@ -0,0 +1,9 @@
config VIDEO_SUN6I_CSI
tristate "Allwinner V3s Camera Sensor Interface driver"
depends on VIDEO_V4L2 && COMMON_CLK && VIDEO_V4L2_SUBDEV_API && HAS_DMA
depends on ARCH_SUNXI || COMPILE_TEST
select VIDEOBUF2_DMA_CONTIG
select REGMAP_MMIO
select V4L2_FWNODE
help
Support for the Allwinner Camera Sensor Interface Controller on V3s.

3
drivers/media/platform/sunxi/sun6i-csi/Makefile Normal file
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@ -0,0 +1,3 @@
sun6i-csi-y += sun6i_video.o sun6i_csi.o
obj-$(CONFIG_VIDEO_SUN6I_CSI) += sun6i-csi.o

912
drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c Normal file
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@ -0,0 +1,912 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2011-2018 Magewell Electronics Co., Ltd. (Nanjing)
* All rights reserved.
* Author: Yong Deng <yong.deng@magewell.com>
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/ioctl.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/sched.h>
#include <linux/sizes.h>
#include <linux/slab.h>
#include "sun6i_csi.h"
#include "sun6i_csi_reg.h"
#define MODULE_NAME "sun6i-csi"
struct sun6i_csi_dev {
struct sun6i_csi csi;
struct device *dev;
struct regmap *regmap;
struct clk *clk_mod;
struct clk *clk_ram;
struct reset_control *rstc_bus;
int planar_offset[3];
};
static inline struct sun6i_csi_dev *sun6i_csi_to_dev(struct sun6i_csi *csi)
{
return container_of(csi, struct sun6i_csi_dev, csi);
}
/* TODO add 10&12 bit YUV, RGB support */
bool sun6i_csi_is_format_supported(struct sun6i_csi *csi,
u32 pixformat, u32 mbus_code)
{
struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi);
/*
* Some video receivers have the ability to be compatible with
* 8bit and 16bit bus width.
* Identify the media bus format from device tree.
*/
if ((sdev->csi.v4l2_ep.bus_type == V4L2_MBUS_PARALLEL
|| sdev->csi.v4l2_ep.bus_type == V4L2_MBUS_BT656)
&& sdev->csi.v4l2_ep.bus.parallel.bus_width == 16) {
switch (pixformat) {
case V4L2_PIX_FMT_HM12:
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV21:
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV61:
case V4L2_PIX_FMT_YUV420:
case V4L2_PIX_FMT_YVU420:
case V4L2_PIX_FMT_YUV422P:
switch (mbus_code) {
case MEDIA_BUS_FMT_UYVY8_1X16:
case MEDIA_BUS_FMT_VYUY8_1X16:
case MEDIA_BUS_FMT_YUYV8_1X16:
case MEDIA_BUS_FMT_YVYU8_1X16:
return true;
default:
dev_dbg(sdev->dev, "Unsupported mbus code: 0x%x\n",
mbus_code);
break;
}
break;
default:
dev_dbg(sdev->dev, "Unsupported pixformat: 0x%x\n",
pixformat);
break;
}
return false;
}
switch (pixformat) {
case V4L2_PIX_FMT_SBGGR8:
return (mbus_code == MEDIA_BUS_FMT_SBGGR8_1X8);
case V4L2_PIX_FMT_SGBRG8:
return (mbus_code == MEDIA_BUS_FMT_SGBRG8_1X8);
case V4L2_PIX_FMT_SGRBG8:
return (mbus_code == MEDIA_BUS_FMT_SGRBG8_1X8);
case V4L2_PIX_FMT_SRGGB8:
return (mbus_code == MEDIA_BUS_FMT_SRGGB8_1X8);
case V4L2_PIX_FMT_SBGGR10:
return (mbus_code == MEDIA_BUS_FMT_SBGGR10_1X10);
case V4L2_PIX_FMT_SGBRG10:
return (mbus_code == MEDIA_BUS_FMT_SGBRG10_1X10);
case V4L2_PIX_FMT_SGRBG10:
return (mbus_code == MEDIA_BUS_FMT_SGRBG10_1X10);
case V4L2_PIX_FMT_SRGGB10:
return (mbus_code == MEDIA_BUS_FMT_SRGGB10_1X10);
case V4L2_PIX_FMT_SBGGR12:
return (mbus_code == MEDIA_BUS_FMT_SBGGR12_1X12);
case V4L2_PIX_FMT_SGBRG12:
return (mbus_code == MEDIA_BUS_FMT_SGBRG12_1X12);
case V4L2_PIX_FMT_SGRBG12:
return (mbus_code == MEDIA_BUS_FMT_SGRBG12_1X12);
case V4L2_PIX_FMT_SRGGB12:
return (mbus_code == MEDIA_BUS_FMT_SRGGB12_1X12);
case V4L2_PIX_FMT_YUYV:
return (mbus_code == MEDIA_BUS_FMT_YUYV8_2X8);
case V4L2_PIX_FMT_YVYU:
return (mbus_code == MEDIA_BUS_FMT_YVYU8_2X8);
case V4L2_PIX_FMT_UYVY:
return (mbus_code == MEDIA_BUS_FMT_UYVY8_2X8);
case V4L2_PIX_FMT_VYUY:
return (mbus_code == MEDIA_BUS_FMT_VYUY8_2X8);
case V4L2_PIX_FMT_HM12:
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV21:
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV61:
case V4L2_PIX_FMT_YUV420:
case V4L2_PIX_FMT_YVU420:
case V4L2_PIX_FMT_YUV422P:
switch (mbus_code) {
case MEDIA_BUS_FMT_UYVY8_2X8:
case MEDIA_BUS_FMT_VYUY8_2X8:
case MEDIA_BUS_FMT_YUYV8_2X8:
case MEDIA_BUS_FMT_YVYU8_2X8:
return true;
default:
dev_dbg(sdev->dev, "Unsupported mbus code: 0x%x\n",
mbus_code);
break;
}
break;
default:
dev_dbg(sdev->dev, "Unsupported pixformat: 0x%x\n", pixformat);
break;
}
return false;
}
int sun6i_csi_set_power(struct sun6i_csi *csi, bool enable)
{
struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi);
struct regmap *regmap = sdev->regmap;
int ret;
if (!enable) {
regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, 0);
clk_disable_unprepare(sdev->clk_ram);
clk_disable_unprepare(sdev->clk_mod);
reset_control_assert(sdev->rstc_bus);
return 0;
}
ret = clk_prepare_enable(sdev->clk_mod);
if (ret) {
dev_err(sdev->dev, "Enable csi clk err %d\n", ret);
return ret;
}
ret = clk_prepare_enable(sdev->clk_ram);
if (ret) {
dev_err(sdev->dev, "Enable clk_dram_csi clk err %d\n", ret);
goto clk_mod_disable;
}
ret = reset_control_deassert(sdev->rstc_bus);
if (ret) {
dev_err(sdev->dev, "reset err %d\n", ret);
goto clk_ram_disable;
}
regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, CSI_EN_CSI_EN);
return 0;
clk_ram_disable:
clk_disable_unprepare(sdev->clk_ram);
clk_mod_disable:
clk_disable_unprepare(sdev->clk_mod);
return ret;
}
static enum csi_input_fmt get_csi_input_format(struct sun6i_csi_dev *sdev,
u32 mbus_code, u32 pixformat)
{
/* bayer */
if ((mbus_code & 0xF000) == 0x3000)
return CSI_INPUT_FORMAT_RAW;
switch (pixformat) {
case V4L2_PIX_FMT_YUYV:
case V4L2_PIX_FMT_YVYU:
case V4L2_PIX_FMT_UYVY:
case V4L2_PIX_FMT_VYUY:
return CSI_INPUT_FORMAT_RAW;
default:
break;
}
/* not support YUV420 input format yet */
dev_dbg(sdev->dev, "Select YUV422 as default input format of CSI.\n");
return CSI_INPUT_FORMAT_YUV422;
}
static enum csi_output_fmt get_csi_output_format(struct sun6i_csi_dev *sdev,
u32 pixformat, u32 field)
{
bool buf_interlaced = false;
if (field == V4L2_FIELD_INTERLACED
|| field == V4L2_FIELD_INTERLACED_TB
|| field == V4L2_FIELD_INTERLACED_BT)
buf_interlaced = true;
switch (pixformat) {
case V4L2_PIX_FMT_SBGGR8:
case V4L2_PIX_FMT_SGBRG8:
case V4L2_PIX_FMT_SGRBG8:
case V4L2_PIX_FMT_SRGGB8:
return buf_interlaced ? CSI_FRAME_RAW_8 : CSI_FIELD_RAW_8;
case V4L2_PIX_FMT_SBGGR10:
case V4L2_PIX_FMT_SGBRG10:
case V4L2_PIX_FMT_SGRBG10:
case V4L2_PIX_FMT_SRGGB10:
return buf_interlaced ? CSI_FRAME_RAW_10 : CSI_FIELD_RAW_10;
case V4L2_PIX_FMT_SBGGR12:
case V4L2_PIX_FMT_SGBRG12:
case V4L2_PIX_FMT_SGRBG12:
case V4L2_PIX_FMT_SRGGB12:
return buf_interlaced ? CSI_FRAME_RAW_12 : CSI_FIELD_RAW_12;
case V4L2_PIX_FMT_YUYV:
case V4L2_PIX_FMT_YVYU:
case V4L2_PIX_FMT_UYVY:
case V4L2_PIX_FMT_VYUY:
return buf_interlaced ? CSI_FRAME_RAW_8 : CSI_FIELD_RAW_8;
case V4L2_PIX_FMT_HM12:
return buf_interlaced ? CSI_FRAME_MB_YUV420 :
CSI_FIELD_MB_YUV420;
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV21:
return buf_interlaced ? CSI_FRAME_UV_CB_YUV420 :
CSI_FIELD_UV_CB_YUV420;
case V4L2_PIX_FMT_YUV420:
case V4L2_PIX_FMT_YVU420:
return buf_interlaced ? CSI_FRAME_PLANAR_YUV420 :
CSI_FIELD_PLANAR_YUV420;
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV61:
return buf_interlaced ? CSI_FRAME_UV_CB_YUV422 :
CSI_FIELD_UV_CB_YUV422;
case V4L2_PIX_FMT_YUV422P:
return buf_interlaced ? CSI_FRAME_PLANAR_YUV422 :
CSI_FIELD_PLANAR_YUV422;
default:
dev_warn(sdev->dev, "Unsupported pixformat: 0x%x\n", pixformat);
break;
}
return CSI_FIELD_RAW_8;
}
static enum csi_input_seq get_csi_input_seq(struct sun6i_csi_dev *sdev,
u32 mbus_code, u32 pixformat)
{
switch (pixformat) {
case V4L2_PIX_FMT_HM12:
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_YUV420:
case V4L2_PIX_FMT_YUV422P:
switch (mbus_code) {
case MEDIA_BUS_FMT_UYVY8_2X8:
case MEDIA_BUS_FMT_UYVY8_1X16:
return CSI_INPUT_SEQ_UYVY;
case MEDIA_BUS_FMT_VYUY8_2X8:
case MEDIA_BUS_FMT_VYUY8_1X16:
return CSI_INPUT_SEQ_VYUY;
case MEDIA_BUS_FMT_YUYV8_2X8:
case MEDIA_BUS_FMT_YUYV8_1X16:
return CSI_INPUT_SEQ_YUYV;
case MEDIA_BUS_FMT_YVYU8_1X16:
case MEDIA_BUS_FMT_YVYU8_2X8:
return CSI_INPUT_SEQ_YVYU;
default:
dev_warn(sdev->dev, "Unsupported mbus code: 0x%x\n",
mbus_code);
break;
}
break;
case V4L2_PIX_FMT_NV21:
case V4L2_PIX_FMT_NV61:
case V4L2_PIX_FMT_YVU420:
switch (mbus_code) {
case MEDIA_BUS_FMT_UYVY8_2X8:
case MEDIA_BUS_FMT_UYVY8_1X16:
return CSI_INPUT_SEQ_VYUY;
case MEDIA_BUS_FMT_VYUY8_2X8:
case MEDIA_BUS_FMT_VYUY8_1X16:
return CSI_INPUT_SEQ_UYVY;
case MEDIA_BUS_FMT_YUYV8_2X8:
case MEDIA_BUS_FMT_YUYV8_1X16:
return CSI_INPUT_SEQ_YVYU;
case MEDIA_BUS_FMT_YVYU8_1X16:
case MEDIA_BUS_FMT_YVYU8_2X8:
return CSI_INPUT_SEQ_YUYV;
default:
dev_warn(sdev->dev, "Unsupported mbus code: 0x%x\n",
mbus_code);
break;
}
break;
case V4L2_PIX_FMT_YUYV:
return CSI_INPUT_SEQ_YUYV;
default:
dev_warn(sdev->dev, "Unsupported pixformat: 0x%x, defaulting to YUYV\n",
pixformat);
break;
}
return CSI_INPUT_SEQ_YUYV;
}
static void sun6i_csi_setup_bus(struct sun6i_csi_dev *sdev)
{
struct v4l2_fwnode_endpoint *endpoint = &sdev->csi.v4l2_ep;
struct sun6i_csi *csi = &sdev->csi;
unsigned char bus_width;
u32 flags;
u32 cfg;
bool input_interlaced = false;
if (csi->config.field == V4L2_FIELD_INTERLACED
|| csi->config.field == V4L2_FIELD_INTERLACED_TB
|| csi->config.field == V4L2_FIELD_INTERLACED_BT)
input_interlaced = true;
bus_width = endpoint->bus.parallel.bus_width;
regmap_read(sdev->regmap, CSI_IF_CFG_REG, &cfg);
cfg &= ~(CSI_IF_CFG_CSI_IF_MASK | CSI_IF_CFG_MIPI_IF_MASK |
CSI_IF_CFG_IF_DATA_WIDTH_MASK |
CSI_IF_CFG_CLK_POL_MASK | CSI_IF_CFG_VREF_POL_MASK |
CSI_IF_CFG_HREF_POL_MASK | CSI_IF_CFG_FIELD_MASK |
CSI_IF_CFG_SRC_TYPE_MASK);
if (input_interlaced)
cfg |= CSI_IF_CFG_SRC_TYPE_INTERLACED;
else
cfg |= CSI_IF_CFG_SRC_TYPE_PROGRESSED;
switch (endpoint->bus_type) {
case V4L2_MBUS_PARALLEL:
cfg |= CSI_IF_CFG_MIPI_IF_CSI;
flags = endpoint->bus.parallel.flags;
cfg |= (bus_width == 16) ? CSI_IF_CFG_CSI_IF_YUV422_16BIT :
CSI_IF_CFG_CSI_IF_YUV422_INTLV;
if (flags & V4L2_MBUS_FIELD_EVEN_LOW)
cfg |= CSI_IF_CFG_FIELD_POSITIVE;
if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
cfg |= CSI_IF_CFG_VREF_POL_POSITIVE;
if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
cfg |= CSI_IF_CFG_HREF_POL_POSITIVE;
if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
cfg |= CSI_IF_CFG_CLK_POL_FALLING_EDGE;
break;
case V4L2_MBUS_BT656:
cfg |= CSI_IF_CFG_MIPI_IF_CSI;
flags = endpoint->bus.parallel.flags;
cfg |= (bus_width == 16) ? CSI_IF_CFG_CSI_IF_BT1120 :
CSI_IF_CFG_CSI_IF_BT656;
if (flags & V4L2_MBUS_FIELD_EVEN_LOW)
cfg |= CSI_IF_CFG_FIELD_POSITIVE;
if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
cfg |= CSI_IF_CFG_CLK_POL_FALLING_EDGE;
break;
default:
dev_warn(sdev->dev, "Unsupported bus type: %d\n",
endpoint->bus_type);
break;
}
switch (bus_width) {
case 8:
cfg |= CSI_IF_CFG_IF_DATA_WIDTH_8BIT;
break;
case 10:
cfg |= CSI_IF_CFG_IF_DATA_WIDTH_10BIT;
break;
case 12:
cfg |= CSI_IF_CFG_IF_DATA_WIDTH_12BIT;
break;
case 16: /* No need to configure DATA_WIDTH for 16bit */
break;
default:
dev_warn(sdev->dev, "Unsupported bus width: %u\n", bus_width);
break;
}
regmap_write(sdev->regmap, CSI_IF_CFG_REG, cfg);
}
static void sun6i_csi_set_format(struct sun6i_csi_dev *sdev)
{
struct sun6i_csi *csi = &sdev->csi;
u32 cfg;
u32 val;
regmap_read(sdev->regmap, CSI_CH_CFG_REG, &cfg);
cfg &= ~(CSI_CH_CFG_INPUT_FMT_MASK |
CSI_CH_CFG_OUTPUT_FMT_MASK | CSI_CH_CFG_VFLIP_EN |
CSI_CH_CFG_HFLIP_EN | CSI_CH_CFG_FIELD_SEL_MASK |
CSI_CH_CFG_INPUT_SEQ_MASK);
val = get_csi_input_format(sdev, csi->config.code,
csi->config.pixelformat);
cfg |= CSI_CH_CFG_INPUT_FMT(val);
val = get_csi_output_format(sdev, csi->config.pixelformat,
csi->config.field);
cfg |= CSI_CH_CFG_OUTPUT_FMT(val);
val = get_csi_input_seq(sdev, csi->config.code,
csi->config.pixelformat);
cfg |= CSI_CH_CFG_INPUT_SEQ(val);
if (csi->config.field == V4L2_FIELD_TOP)
cfg |= CSI_CH_CFG_FIELD_SEL_FIELD0;
else if (csi->config.field == V4L2_FIELD_BOTTOM)
cfg |= CSI_CH_CFG_FIELD_SEL_FIELD1;
else
cfg |= CSI_CH_CFG_FIELD_SEL_BOTH;
regmap_write(sdev->regmap, CSI_CH_CFG_REG, cfg);
}
static void sun6i_csi_set_window(struct sun6i_csi_dev *sdev)
{
struct sun6i_csi_config *config = &sdev->csi.config;
u32 bytesperline_y;
u32 bytesperline_c;
int *planar_offset = sdev->planar_offset;
u32 width = config->width;
u32 height = config->height;
u32 hor_len = width;
switch (config->pixelformat) {
case V4L2_PIX_FMT_YUYV:
case V4L2_PIX_FMT_YVYU:
case V4L2_PIX_FMT_UYVY:
case V4L2_PIX_FMT_VYUY:
dev_dbg(sdev->dev,
"Horizontal length should be 2 times of width for packed YUV formats!\n");
hor_len = width * 2;
break;
default:
break;
}
regmap_write(sdev->regmap, CSI_CH_HSIZE_REG,
CSI_CH_HSIZE_HOR_LEN(hor_len) |
CSI_CH_HSIZE_HOR_START(0));
regmap_write(sdev->regmap, CSI_CH_VSIZE_REG,
CSI_CH_VSIZE_VER_LEN(height) |
CSI_CH_VSIZE_VER_START(0));
planar_offset[0] = 0;
switch (config->pixelformat) {
case V4L2_PIX_FMT_HM12:
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV21:
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV61:
bytesperline_y = width;
bytesperline_c = width;
planar_offset[1] = bytesperline_y * height;
planar_offset[2] = -1;
break;
case V4L2_PIX_FMT_YUV420:
case V4L2_PIX_FMT_YVU420:
bytesperline_y = width;
bytesperline_c = width / 2;
planar_offset[1] = bytesperline_y * height;
planar_offset[2] = planar_offset[1] +
bytesperline_c * height / 2;
break;
case V4L2_PIX_FMT_YUV422P:
bytesperline_y = width;
bytesperline_c = width / 2;
planar_offset[1] = bytesperline_y * height;
planar_offset[2] = planar_offset[1] +
bytesperline_c * height;
break;
default: /* raw */
dev_dbg(sdev->dev,
"Calculating pixelformat(0x%x)'s bytesperline as a packed format\n",
config->pixelformat);
bytesperline_y = (sun6i_csi_get_bpp(config->pixelformat) *
config->width) / 8;
bytesperline_c = 0;
planar_offset[1] = -1;
planar_offset[2] = -1;
break;
}
regmap_write(sdev->regmap, CSI_CH_BUF_LEN_REG,
CSI_CH_BUF_LEN_BUF_LEN_C(bytesperline_c) |
CSI_CH_BUF_LEN_BUF_LEN_Y(bytesperline_y));
}
int sun6i_csi_update_config(struct sun6i_csi *csi,
struct sun6i_csi_config *config)
{
struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi);
if (config == NULL)
return -EINVAL;
memcpy(&csi->config, config, sizeof(csi->config));
sun6i_csi_setup_bus(sdev);
sun6i_csi_set_format(sdev);
sun6i_csi_set_window(sdev);
return 0;
}
void sun6i_csi_update_buf_addr(struct sun6i_csi *csi, dma_addr_t addr)
{
struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi);
regmap_write(sdev->regmap, CSI_CH_F0_BUFA_REG,
(addr + sdev->planar_offset[0]) >> 2);
if (sdev->planar_offset[1] != -1)
regmap_write(sdev->regmap, CSI_CH_F1_BUFA_REG,
(addr + sdev->planar_offset[1]) >> 2);
if (sdev->planar_offset[2] != -1)
regmap_write(sdev->regmap, CSI_CH_F2_BUFA_REG,
(addr + sdev->planar_offset[2]) >> 2);
}
void sun6i_csi_set_stream(struct sun6i_csi *csi, bool enable)
{
struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi);
struct regmap *regmap = sdev->regmap;
if (!enable) {
regmap_update_bits(regmap, CSI_CAP_REG, CSI_CAP_CH0_VCAP_ON, 0);
regmap_write(regmap, CSI_CH_INT_EN_REG, 0);
return;
}
regmap_write(regmap, CSI_CH_INT_STA_REG, 0xFF);
regmap_write(regmap, CSI_CH_INT_EN_REG,
CSI_CH_INT_EN_HB_OF_INT_EN |
CSI_CH_INT_EN_FIFO2_OF_INT_EN |
CSI_CH_INT_EN_FIFO1_OF_INT_EN |
CSI_CH_INT_EN_FIFO0_OF_INT_EN |
CSI_CH_INT_EN_FD_INT_EN |
CSI_CH_INT_EN_CD_INT_EN);
regmap_update_bits(regmap, CSI_CAP_REG, CSI_CAP_CH0_VCAP_ON,
CSI_CAP_CH0_VCAP_ON);
}
/* -----------------------------------------------------------------------------
* Media Controller and V4L2
*/
static int sun6i_csi_link_entity(struct sun6i_csi *csi,
struct media_entity *entity,
struct fwnode_handle *fwnode)
{
struct media_entity *sink;
struct media_pad *sink_pad;
int src_pad_index;
int ret;
ret = media_entity_get_fwnode_pad(entity, fwnode, MEDIA_PAD_FL_SOURCE);
if (ret < 0) {
dev_err(csi->dev, "%s: no source pad in external entity %s\n",
__func__, entity->name);
return -EINVAL;
}
src_pad_index = ret;
sink = &csi->video.vdev.entity;
sink_pad = &csi->video.pad;
dev_dbg(csi->dev, "creating %s:%u -> %s:%u link\n",
entity->name, src_pad_index, sink->name, sink_pad->index);
ret = media_create_pad_link(entity, src_pad_index, sink,
sink_pad->index,
MEDIA_LNK_FL_ENABLED |
MEDIA_LNK_FL_IMMUTABLE);
if (ret < 0) {
dev_err(csi->dev, "failed to create %s:%u -> %s:%u link\n",
entity->name, src_pad_index,
sink->name, sink_pad->index);
return ret;
}
return 0;
}
static int sun6i_subdev_notify_complete(struct v4l2_async_notifier *notifier)
{
struct sun6i_csi *csi = container_of(notifier, struct sun6i_csi,
notifier);
struct v4l2_device *v4l2_dev = &csi->v4l2_dev;
struct v4l2_subdev *sd;
int ret;
dev_dbg(csi->dev, "notify complete, all subdevs registered\n");
sd = list_first_entry(&v4l2_dev->subdevs, struct v4l2_subdev, list);
if (sd == NULL)
return -EINVAL;
ret = sun6i_csi_link_entity(csi, &sd->entity, sd->fwnode);
if (ret < 0)
return ret;
ret = v4l2_device_register_subdev_nodes(&csi->v4l2_dev);
if (ret < 0)
return ret;
return media_device_register(&csi->media_dev);
}
static const struct v4l2_async_notifier_operations sun6i_csi_async_ops = {
.complete = sun6i_subdev_notify_complete,
};
static int sun6i_csi_fwnode_parse(struct device *dev,
struct v4l2_fwnode_endpoint *vep,
struct v4l2_async_subdev *asd)
{
struct sun6i_csi *csi = dev_get_drvdata(dev);
if (vep->base.port || vep->base.id) {
dev_warn(dev, "Only support a single port with one endpoint\n");
return -ENOTCONN;
}
switch (vep->bus_type) {
case V4L2_MBUS_PARALLEL:
case V4L2_MBUS_BT656:
csi->v4l2_ep = *vep;
return 0;
default:
dev_err(dev, "Unsupported media bus type\n");
return -ENOTCONN;
}
}
static void sun6i_csi_v4l2_cleanup(struct sun6i_csi *csi)
{
media_device_unregister(&csi->media_dev);
v4l2_async_notifier_unregister(&csi->notifier);
v4l2_async_notifier_cleanup(&csi->notifier);
sun6i_video_cleanup(&csi->video);
v4l2_device_unregister(&csi->v4l2_dev);
v4l2_ctrl_handler_free(&csi->ctrl_handler);
media_device_cleanup(&csi->media_dev);
}
static int sun6i_csi_v4l2_init(struct sun6i_csi *csi)
{
int ret;
csi->media_dev.dev = csi->dev;
strscpy(csi->media_dev.model, "Allwinner Video Capture Device",
sizeof(csi->media_dev.model));
csi->media_dev.hw_revision = 0;
media_device_init(&csi->media_dev);
v4l2_async_notifier_init(&csi->notifier);
ret = v4l2_ctrl_handler_init(&csi->ctrl_handler, 0);
if (ret) {
dev_err(csi->dev, "V4L2 controls handler init failed (%d)\n",
ret);
goto clean_media;
}
csi->v4l2_dev.mdev = &csi->media_dev;
csi->v4l2_dev.ctrl_handler = &csi->ctrl_handler;
ret = v4l2_device_register(csi->dev, &csi->v4l2_dev);
if (ret) {
dev_err(csi->dev, "V4L2 device registration failed (%d)\n",
ret);
goto free_ctrl;
}
ret = sun6i_video_init(&csi->video, csi, "sun6i-csi");
if (ret)
goto unreg_v4l2;
ret = v4l2_async_notifier_parse_fwnode_endpoints(
csi->dev, &csi->notifier, sizeof(struct v4l2_async_subdev),
sun6i_csi_fwnode_parse);
if (ret)
goto clean_video;
csi->notifier.ops = &sun6i_csi_async_ops;
ret = v4l2_async_notifier_register(&csi->v4l2_dev, &csi->notifier);
if (ret) {
dev_err(csi->dev, "notifier registration failed\n");
goto clean_video;
}
return 0;
clean_video:
sun6i_video_cleanup(&csi->video);
unreg_v4l2:
v4l2_device_unregister(&csi->v4l2_dev);
free_ctrl:
v4l2_ctrl_handler_free(&csi->ctrl_handler);
clean_media:
v4l2_async_notifier_cleanup(&csi->notifier);
media_device_cleanup(&csi->media_dev);
return ret;
}
/* -----------------------------------------------------------------------------
* Resources and IRQ
*/
static irqreturn_t sun6i_csi_isr(int irq, void *dev_id)
{
struct sun6i_csi_dev *sdev = (struct sun6i_csi_dev *)dev_id;
struct regmap *regmap = sdev->regmap;
u32 status;
regmap_read(regmap, CSI_CH_INT_STA_REG, &status);
if (!(status & 0xFF))
return IRQ_NONE;
if ((status & CSI_CH_INT_STA_FIFO0_OF_PD) ||
(status & CSI_CH_INT_STA_FIFO1_OF_PD) ||
(status & CSI_CH_INT_STA_FIFO2_OF_PD) ||
(status & CSI_CH_INT_STA_HB_OF_PD)) {
regmap_write(regmap, CSI_CH_INT_STA_REG, status);
regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, 0);
regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN,
CSI_EN_CSI_EN);
return IRQ_HANDLED;
}
if (status & CSI_CH_INT_STA_FD_PD)
sun6i_video_frame_done(&sdev->csi.video);
regmap_write(regmap, CSI_CH_INT_STA_REG, status);
return IRQ_HANDLED;
}
static const struct regmap_config sun6i_csi_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = 0x1000,
};
static int sun6i_csi_resource_request(struct sun6i_csi_dev *sdev,
struct platform_device *pdev)
{
struct resource *res;
void __iomem *io_base;
int ret;
int irq;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
io_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(io_base))
return PTR_ERR(io_base);
sdev->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "bus", io_base,
&sun6i_csi_regmap_config);
if (IS_ERR(sdev->regmap)) {
dev_err(&pdev->dev, "Failed to init register map\n");
return PTR_ERR(sdev->regmap);
}
sdev->clk_mod = devm_clk_get(&pdev->dev, "mod");
if (IS_ERR(sdev->clk_mod)) {
dev_err(&pdev->dev, "Unable to acquire csi clock\n");
return PTR_ERR(sdev->clk_mod);
}
sdev->clk_ram = devm_clk_get(&pdev->dev, "ram");
if (IS_ERR(sdev->clk_ram)) {
dev_err(&pdev->dev, "Unable to acquire dram-csi clock\n");
return PTR_ERR(sdev->clk_ram);
}
sdev->rstc_bus = devm_reset_control_get_shared(&pdev->dev, NULL);
if (IS_ERR(sdev->rstc_bus)) {
dev_err(&pdev->dev, "Cannot get reset controller\n");
return PTR_ERR(sdev->rstc_bus);
}
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "No csi IRQ specified\n");
ret = -ENXIO;
return ret;
}
ret = devm_request_irq(&pdev->dev, irq, sun6i_csi_isr, 0, MODULE_NAME,
sdev);
if (ret) {
dev_err(&pdev->dev, "Cannot request csi IRQ\n");
return ret;
}
return 0;
}
/*
* PHYS_OFFSET isn't available on all architectures. In order to
* accomodate for COMPILE_TEST, let's define it to something dumb.
*/
#if defined(CONFIG_COMPILE_TEST) && !defined(PHYS_OFFSET)
#define PHYS_OFFSET 0
#endif
static int sun6i_csi_probe(struct platform_device *pdev)
{
struct sun6i_csi_dev *sdev;
int ret;
sdev = devm_kzalloc(&pdev->dev, sizeof(*sdev), GFP_KERNEL);
if (!sdev)
return -ENOMEM;
sdev->dev = &pdev->dev;
/* The DMA bus has the memory mapped at 0 */
sdev->dev->dma_pfn_offset = PHYS_OFFSET >> PAGE_SHIFT;
ret = sun6i_csi_resource_request(sdev, pdev);
if (ret)
return ret;
platform_set_drvdata(pdev, sdev);
sdev->csi.dev = &pdev->dev;
return sun6i_csi_v4l2_init(&sdev->csi);
}
static int sun6i_csi_remove(struct platform_device *pdev)
{
struct sun6i_csi_dev *sdev = platform_get_drvdata(pdev);
sun6i_csi_v4l2_cleanup(&sdev->csi);
return 0;
}
static const struct of_device_id sun6i_csi_of_match[] = {
{ .compatible = "allwinner,sun8i-v3s-csi", },
{},
};
MODULE_DEVICE_TABLE(of, sun6i_csi_of_match);
static struct platform_driver sun6i_csi_platform_driver = {
.probe = sun6i_csi_probe,
.remove = sun6i_csi_remove,
.driver = {
.name = MODULE_NAME,
.of_match_table = of_match_ptr(sun6i_csi_of_match),
},
};
module_platform_driver(sun6i_csi_platform_driver);
MODULE_DESCRIPTION("Allwinner V3s Camera Sensor Interface driver");
MODULE_AUTHOR("Yong Deng <yong.deng@magewell.com>");
MODULE_LICENSE("GPL");

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drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h Normal file
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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2011-2018 Magewell Electronics Co., Ltd. (Nanjing)
* All rights reserved.
* Author: Yong Deng <yong.deng@magewell.com>
*/
#ifndef __SUN6I_CSI_H__
#define __SUN6I_CSI_H__
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>
#include "sun6i_video.h"
struct sun6i_csi;
/**
* struct sun6i_csi_config - configs for sun6i csi
* @pixelformat: v4l2 pixel format (V4L2_PIX_FMT_*)
* @code: media bus format code (MEDIA_BUS_FMT_*)
* @field: used interlacing type (enum v4l2_field)
* @width: frame width
* @height: frame height
*/
struct sun6i_csi_config {
u32 pixelformat;
u32 code;
u32 field;
u32 width;
u32 height;
};
struct sun6i_csi {
struct device *dev;
struct v4l2_ctrl_handler ctrl_handler;
struct v4l2_device v4l2_dev;
struct media_device media_dev;
struct v4l2_async_notifier notifier;
/* video port settings */
struct v4l2_fwnode_endpoint v4l2_ep;
struct sun6i_csi_config config;
struct sun6i_video video;
};
/**
* sun6i_csi_is_format_supported() - check if the format supported by csi
* @csi: pointer to the csi
* @pixformat: v4l2 pixel format (V4L2_PIX_FMT_*)
* @mbus_code: media bus format code (MEDIA_BUS_FMT_*)
*/
bool sun6i_csi_is_format_supported(struct sun6i_csi *csi, u32 pixformat,
u32 mbus_code);
/**
* sun6i_csi_set_power() - power on/off the csi
* @csi: pointer to the csi
* @enable: on/off
*/
int sun6i_csi_set_power(struct sun6i_csi *csi, bool enable);
/**
* sun6i_csi_update_config() - update the csi register setttings
* @csi: pointer to the csi
* @config: see struct sun6i_csi_config
*/
int sun6i_csi_update_config(struct sun6i_csi *csi,
struct sun6i_csi_config *config);
/**
* sun6i_csi_update_buf_addr() - update the csi frame buffer address
* @csi: pointer to the csi
* @addr: frame buffer's physical address
*/
void sun6i_csi_update_buf_addr(struct sun6i_csi *csi, dma_addr_t addr);
/**
* sun6i_csi_set_stream() - start/stop csi streaming
* @csi: pointer to the csi
* @enable: start/stop
*/
void sun6i_csi_set_stream(struct sun6i_csi *csi, bool enable);
/* get bpp form v4l2 pixformat */
static inline int sun6i_csi_get_bpp(unsigned int pixformat)
{
switch (pixformat) {
case V4L2_PIX_FMT_SBGGR8:
case V4L2_PIX_FMT_SGBRG8:
case V4L2_PIX_FMT_SGRBG8:
case V4L2_PIX_FMT_SRGGB8:
return 8;
case V4L2_PIX_FMT_SBGGR10:
case V4L2_PIX_FMT_SGBRG10:
case V4L2_PIX_FMT_SGRBG10:
case V4L2_PIX_FMT_SRGGB10:
return 10;
case V4L2_PIX_FMT_SBGGR12:
case V4L2_PIX_FMT_SGBRG12:
case V4L2_PIX_FMT_SGRBG12:
case V4L2_PIX_FMT_SRGGB12:
case V4L2_PIX_FMT_HM12:
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV21:
case V4L2_PIX_FMT_YUV420:
case V4L2_PIX_FMT_YVU420:
return 12;
case V4L2_PIX_FMT_YUYV:
case V4L2_PIX_FMT_YVYU:
case V4L2_PIX_FMT_UYVY:
case V4L2_PIX_FMT_VYUY:
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV61:
case V4L2_PIX_FMT_YUV422P:
return 16;
case V4L2_PIX_FMT_RGB24:
case V4L2_PIX_FMT_BGR24:
return 24;
case V4L2_PIX_FMT_RGB32:
case V4L2_PIX_FMT_BGR32:
return 32;
default:
WARN(1, "Unsupported pixformat: 0x%x\n", pixformat);
break;
}
return 0;
}
#endif /* __SUN6I_CSI_H__ */

196
drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_reg.h Normal file
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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2011-2018 Magewell Electronics Co., Ltd. (Nanjing)
* All rights reserved.
* Author: Yong Deng <yong.deng@magewell.com>
*/
#ifndef __SUN6I_CSI_REG_H__
#define __SUN6I_CSI_REG_H__
#include <linux/kernel.h>
#define CSI_EN_REG 0x0
#define CSI_EN_VER_EN BIT(30)
#define CSI_EN_CSI_EN BIT(0)
#define CSI_IF_CFG_REG 0x4
#define CSI_IF_CFG_SRC_TYPE_MASK BIT(21)
#define CSI_IF_CFG_SRC_TYPE_PROGRESSED ((0 << 21) & CSI_IF_CFG_SRC_TYPE_MASK)
#define CSI_IF_CFG_SRC_TYPE_INTERLACED ((1 << 21) & CSI_IF_CFG_SRC_TYPE_MASK)
#define CSI_IF_CFG_FPS_DS_EN BIT(20)
#define CSI_IF_CFG_FIELD_MASK BIT(19)
#define CSI_IF_CFG_FIELD_NEGATIVE ((0 << 19) & CSI_IF_CFG_FIELD_MASK)
#define CSI_IF_CFG_FIELD_POSITIVE ((1 << 19) & CSI_IF_CFG_FIELD_MASK)
#define CSI_IF_CFG_VREF_POL_MASK BIT(18)
#define CSI_IF_CFG_VREF_POL_NEGATIVE ((0 << 18) & CSI_IF_CFG_VREF_POL_MASK)
#define CSI_IF_CFG_VREF_POL_POSITIVE ((1 << 18) & CSI_IF_CFG_VREF_POL_MASK)
#define CSI_IF_CFG_HREF_POL_MASK BIT(17)
#define CSI_IF_CFG_HREF_POL_NEGATIVE ((0 << 17) & CSI_IF_CFG_HREF_POL_MASK)
#define CSI_IF_CFG_HREF_POL_POSITIVE ((1 << 17) & CSI_IF_CFG_HREF_POL_MASK)
#define CSI_IF_CFG_CLK_POL_MASK BIT(16)
#define CSI_IF_CFG_CLK_POL_RISING_EDGE ((0 << 16) & CSI_IF_CFG_CLK_POL_MASK)
#define CSI_IF_CFG_CLK_POL_FALLING_EDGE ((1 << 16) & CSI_IF_CFG_CLK_POL_MASK)
#define CSI_IF_CFG_IF_DATA_WIDTH_MASK GENMASK(10, 8)
#define CSI_IF_CFG_IF_DATA_WIDTH_8BIT ((0 << 8) & CSI_IF_CFG_IF_DATA_WIDTH_MASK)
#define CSI_IF_CFG_IF_DATA_WIDTH_10BIT ((1 << 8) & CSI_IF_CFG_IF_DATA_WIDTH_MASK)
#define CSI_IF_CFG_IF_DATA_WIDTH_12BIT ((2 << 8) & CSI_IF_CFG_IF_DATA_WIDTH_MASK)
#define CSI_IF_CFG_MIPI_IF_MASK BIT(7)
#define CSI_IF_CFG_MIPI_IF_CSI (0 << 7)
#define CSI_IF_CFG_MIPI_IF_MIPI (1 << 7)
#define CSI_IF_CFG_CSI_IF_MASK GENMASK(4, 0)
#define CSI_IF_CFG_CSI_IF_YUV422_INTLV ((0 << 0) & CSI_IF_CFG_CSI_IF_MASK)
#define CSI_IF_CFG_CSI_IF_YUV422_16BIT ((1 << 0) & CSI_IF_CFG_CSI_IF_MASK)
#define CSI_IF_CFG_CSI_IF_BT656 ((4 << 0) & CSI_IF_CFG_CSI_IF_MASK)
#define CSI_IF_CFG_CSI_IF_BT1120 ((5 << 0) & CSI_IF_CFG_CSI_IF_MASK)
#define CSI_CAP_REG 0x8
#define CSI_CAP_CH0_CAP_MASK_MASK GENMASK(5, 2)
#define CSI_CAP_CH0_CAP_MASK(count) ((count << 2) & CSI_CAP_CH0_CAP_MASK_MASK)
#define CSI_CAP_CH0_VCAP_ON BIT(1)
#define CSI_CAP_CH0_SCAP_ON BIT(0)
#define CSI_SYNC_CNT_REG 0xc
#define CSI_FIFO_THRS_REG 0x10
#define CSI_BT656_HEAD_CFG_REG 0x14
#define CSI_PTN_LEN_REG 0x30
#define CSI_PTN_ADDR_REG 0x34
#define CSI_VER_REG 0x3c
#define CSI_CH_CFG_REG 0x44
#define CSI_CH_CFG_INPUT_FMT_MASK GENMASK(23, 20)
#define CSI_CH_CFG_INPUT_FMT(fmt) ((fmt << 20) & CSI_CH_CFG_INPUT_FMT_MASK)
#define CSI_CH_CFG_OUTPUT_FMT_MASK GENMASK(19, 16)
#define CSI_CH_CFG_OUTPUT_FMT(fmt) ((fmt << 16) & CSI_CH_CFG_OUTPUT_FMT_MASK)
#define CSI_CH_CFG_VFLIP_EN BIT(13)
#define CSI_CH_CFG_HFLIP_EN BIT(12)
#define CSI_CH_CFG_FIELD_SEL_MASK GENMASK(11, 10)
#define CSI_CH_CFG_FIELD_SEL_FIELD0 ((0 << 10) & CSI_CH_CFG_FIELD_SEL_MASK)
#define CSI_CH_CFG_FIELD_SEL_FIELD1 ((1 << 10) & CSI_CH_CFG_FIELD_SEL_MASK)
#define CSI_CH_CFG_FIELD_SEL_BOTH ((2 << 10) & CSI_CH_CFG_FIELD_SEL_MASK)
#define CSI_CH_CFG_INPUT_SEQ_MASK GENMASK(9, 8)
#define CSI_CH_CFG_INPUT_SEQ(seq) ((seq << 8) & CSI_CH_CFG_INPUT_SEQ_MASK)
#define CSI_CH_SCALE_REG 0x4c
#define CSI_CH_SCALE_QUART_EN BIT(0)
#define CSI_CH_F0_BUFA_REG 0x50
#define CSI_CH_F1_BUFA_REG 0x58
#define CSI_CH_F2_BUFA_REG 0x60
#define CSI_CH_STA_REG 0x6c
#define CSI_CH_STA_FIELD_STA_MASK BIT(2)
#define CSI_CH_STA_FIELD_STA_FIELD0 ((0 << 2) & CSI_CH_STA_FIELD_STA_MASK)
#define CSI_CH_STA_FIELD_STA_FIELD1 ((1 << 2) & CSI_CH_STA_FIELD_STA_MASK)
#define CSI_CH_STA_VCAP_STA BIT(1)
#define CSI_CH_STA_SCAP_STA BIT(0)
#define CSI_CH_INT_EN_REG 0x70
#define CSI_CH_INT_EN_VS_INT_EN BIT(7)
#define CSI_CH_INT_EN_HB_OF_INT_EN BIT(6)
#define CSI_CH_INT_EN_MUL_ERR_INT_EN BIT(5)
#define CSI_CH_INT_EN_FIFO2_OF_INT_EN BIT(4)
#define CSI_CH_INT_EN_FIFO1_OF_INT_EN BIT(3)
#define CSI_CH_INT_EN_FIFO0_OF_INT_EN BIT(2)
#define CSI_CH_INT_EN_FD_INT_EN BIT(1)
#define CSI_CH_INT_EN_CD_INT_EN BIT(0)
#define CSI_CH_INT_STA_REG 0x74
#define CSI_CH_INT_STA_VS_PD BIT(7)
#define CSI_CH_INT_STA_HB_OF_PD BIT(6)
#define CSI_CH_INT_STA_MUL_ERR_PD BIT(5)
#define CSI_CH_INT_STA_FIFO2_OF_PD BIT(4)
#define CSI_CH_INT_STA_FIFO1_OF_PD BIT(3)
#define CSI_CH_INT_STA_FIFO0_OF_PD BIT(2)
#define CSI_CH_INT_STA_FD_PD BIT(1)
#define CSI_CH_INT_STA_CD_PD BIT(0)
#define CSI_CH_FLD1_VSIZE_REG 0x78
#define CSI_CH_HSIZE_REG 0x80
#define CSI_CH_HSIZE_HOR_LEN_MASK GENMASK(28, 16)
#define CSI_CH_HSIZE_HOR_LEN(len) ((len << 16) & CSI_CH_HSIZE_HOR_LEN_MASK)
#define CSI_CH_HSIZE_HOR_START_MASK GENMASK(12, 0)
#define CSI_CH_HSIZE_HOR_START(start) ((start << 0) & CSI_CH_HSIZE_HOR_START_MASK)
#define CSI_CH_VSIZE_REG 0x84
#define CSI_CH_VSIZE_VER_LEN_MASK GENMASK(28, 16)
#define CSI_CH_VSIZE_VER_LEN(len) ((len << 16) & CSI_CH_VSIZE_VER_LEN_MASK)
#define CSI_CH_VSIZE_VER_START_MASK GENMASK(12, 0)
#define CSI_CH_VSIZE_VER_START(start) ((start << 0) & CSI_CH_VSIZE_VER_START_MASK)
#define CSI_CH_BUF_LEN_REG 0x88
#define CSI_CH_BUF_LEN_BUF_LEN_C_MASK GENMASK(29, 16)
#define CSI_CH_BUF_LEN_BUF_LEN_C(len) ((len << 16) & CSI_CH_BUF_LEN_BUF_LEN_C_MASK)
#define CSI_CH_BUF_LEN_BUF_LEN_Y_MASK GENMASK(13, 0)
#define CSI_CH_BUF_LEN_BUF_LEN_Y(len) ((len << 0) & CSI_CH_BUF_LEN_BUF_LEN_Y_MASK)
#define CSI_CH_FLIP_SIZE_REG 0x8c
#define CSI_CH_FLIP_SIZE_VER_LEN_MASK GENMASK(28, 16)
#define CSI_CH_FLIP_SIZE_VER_LEN(len) ((len << 16) & CSI_CH_FLIP_SIZE_VER_LEN_MASK)
#define CSI_CH_FLIP_SIZE_VALID_LEN_MASK GENMASK(12, 0)
#define CSI_CH_FLIP_SIZE_VALID_LEN(len) ((len << 0) & CSI_CH_FLIP_SIZE_VALID_LEN_MASK)
#define CSI_CH_FRM_CLK_CNT_REG 0x90
#define CSI_CH_ACC_ITNL_CLK_CNT_REG 0x94
#define CSI_CH_FIFO_STAT_REG 0x98
#define CSI_CH_PCLK_STAT_REG 0x9c
/*
* csi input data format
*/
enum csi_input_fmt {
CSI_INPUT_FORMAT_RAW = 0,
CSI_INPUT_FORMAT_YUV422 = 3,
CSI_INPUT_FORMAT_YUV420 = 4,
};
/*
* csi output data format
*/
enum csi_output_fmt {
/* only when input format is RAW */
CSI_FIELD_RAW_8 = 0,
CSI_FIELD_RAW_10 = 1,
CSI_FIELD_RAW_12 = 2,
CSI_FIELD_RGB565 = 4,
CSI_FIELD_RGB888 = 5,
CSI_FIELD_PRGB888 = 6,
CSI_FRAME_RAW_8 = 8,
CSI_FRAME_RAW_10 = 9,
CSI_FRAME_RAW_12 = 10,
CSI_FRAME_RGB565 = 12,
CSI_FRAME_RGB888 = 13,
CSI_FRAME_PRGB888 = 14,
/* only when input format is YUV422 */
CSI_FIELD_PLANAR_YUV422 = 0,
CSI_FIELD_PLANAR_YUV420 = 1,
CSI_FRAME_PLANAR_YUV420 = 2,
CSI_FRAME_PLANAR_YUV422 = 3,
CSI_FIELD_UV_CB_YUV422 = 4,
CSI_FIELD_UV_CB_YUV420 = 5,
CSI_FRAME_UV_CB_YUV420 = 6,
CSI_FRAME_UV_CB_YUV422 = 7,
CSI_FIELD_MB_YUV422 = 8,
CSI_FIELD_MB_YUV420 = 9,
CSI_FRAME_MB_YUV420 = 10,
CSI_FRAME_MB_YUV422 = 11,
CSI_FIELD_UV_CB_YUV422_10 = 12,
CSI_FIELD_UV_CB_YUV420_10 = 13,
};
/*
* csi YUV input data sequence
*/
enum csi_input_seq {
/* only when input format is YUV422 */
CSI_INPUT_SEQ_YUYV = 0,
CSI_INPUT_SEQ_YVYU,
CSI_INPUT_SEQ_UYVY,
CSI_INPUT_SEQ_VYUY,
};
#endif /* __SUN6I_CSI_REG_H__ */

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drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c Normal file
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@ -0,0 +1,678 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2011-2018 Magewell Electronics Co., Ltd. (Nanjing)
* All rights reserved.
* Author: Yong Deng <yong.deng@magewell.com>
*/
#include <linux/of.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-mc.h>
#include <media/videobuf2-dma-contig.h>
#include <media/videobuf2-v4l2.h>
#include "sun6i_csi.h"
#include "sun6i_video.h"
/* This is got from BSP sources. */
#define MIN_WIDTH (32)
#define MIN_HEIGHT (32)
#define MAX_WIDTH (4800)
#define MAX_HEIGHT (4800)
struct sun6i_csi_buffer {
struct vb2_v4l2_buffer vb;
struct list_head list;
dma_addr_t dma_addr;
bool queued_to_csi;
};
static const u32 supported_pixformats[] = {
V4L2_PIX_FMT_SBGGR8,
V4L2_PIX_FMT_SGBRG8,
V4L2_PIX_FMT_SGRBG8,
V4L2_PIX_FMT_SRGGB8,
V4L2_PIX_FMT_SBGGR10,
V4L2_PIX_FMT_SGBRG10,
V4L2_PIX_FMT_SGRBG10,
V4L2_PIX_FMT_SRGGB10,
V4L2_PIX_FMT_SBGGR12,
V4L2_PIX_FMT_SGBRG12,
V4L2_PIX_FMT_SGRBG12,
V4L2_PIX_FMT_SRGGB12,
V4L2_PIX_FMT_YUYV,
V4L2_PIX_FMT_YVYU,
V4L2_PIX_FMT_UYVY,
V4L2_PIX_FMT_VYUY,
V4L2_PIX_FMT_HM12,
V4L2_PIX_FMT_NV12,
V4L2_PIX_FMT_NV21,
V4L2_PIX_FMT_YUV420,
V4L2_PIX_FMT_YVU420,
V4L2_PIX_FMT_NV16,
V4L2_PIX_FMT_NV61,
V4L2_PIX_FMT_YUV422P,
};
static bool is_pixformat_valid(unsigned int pixformat)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(supported_pixformats); i++)
if (supported_pixformats[i] == pixformat)
return true;
return false;
}
static struct v4l2_subdev *
sun6i_video_remote_subdev(struct sun6i_video *video, u32 *pad)
{
struct media_pad *remote;
remote = media_entity_remote_pad(&video->pad);
if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
return NULL;
if (pad)
*pad = remote->index;
return media_entity_to_v4l2_subdev(remote->entity);
}
static int sun6i_video_queue_setup(struct vb2_queue *vq,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[],
struct device *alloc_devs[])
{
struct sun6i_video *video = vb2_get_drv_priv(vq);
unsigned int size = video->fmt.fmt.pix.sizeimage;
if (*nplanes)
return sizes[0] < size ? -EINVAL : 0;
*nplanes = 1;
sizes[0] = size;
return 0;
}
static int sun6i_video_buffer_prepare(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct sun6i_csi_buffer *buf =
container_of(vbuf, struct sun6i_csi_buffer, vb);
struct sun6i_video *video = vb2_get_drv_priv(vb->vb2_queue);
unsigned long size = video->fmt.fmt.pix.sizeimage;
if (vb2_plane_size(vb, 0) < size) {
v4l2_err(video->vdev.v4l2_dev, "buffer too small (%lu < %lu)\n",
vb2_plane_size(vb, 0), size);
return -EINVAL;
}
vb2_set_plane_payload(vb, 0, size);
buf->dma_addr = vb2_dma_contig_plane_dma_addr(vb, 0);
vbuf->field = video->fmt.fmt.pix.field;
return 0;
}
static int sun6i_video_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct sun6i_video *video = vb2_get_drv_priv(vq);
struct sun6i_csi_buffer *buf;
struct sun6i_csi_buffer *next_buf;
struct sun6i_csi_config config;
struct v4l2_subdev *subdev;
unsigned long flags;
int ret;
video->sequence = 0;
ret = media_pipeline_start(&video->vdev.entity, &video->vdev.pipe);
if (ret < 0)
goto clear_dma_queue;
if (video->mbus_code == 0) {
ret = -EINVAL;
goto stop_media_pipeline;
}
subdev = sun6i_video_remote_subdev(video, NULL);
if (!subdev)
goto stop_media_pipeline;
config.pixelformat = video->fmt.fmt.pix.pixelformat;
config.code = video->mbus_code;
config.field = video->fmt.fmt.pix.field;
config.width = video->fmt.fmt.pix.width;
config.height = video->fmt.fmt.pix.height;
ret = sun6i_csi_update_config(video->csi, &config);
if (ret < 0)
goto stop_media_pipeline;
spin_lock_irqsave(&video->dma_queue_lock, flags);
buf = list_first_entry(&video->dma_queue,
struct sun6i_csi_buffer, list);
buf->queued_to_csi = true;
sun6i_csi_update_buf_addr(video->csi, buf->dma_addr);
sun6i_csi_set_stream(video->csi, true);
/*
* CSI will lookup the next dma buffer for next frame before the
* the current frame done IRQ triggered. This is not documented
* but reported by Ondřej Jirman.
* The BSP code has workaround for this too. It skip to mark the
* first buffer as frame done for VB2 and pass the second buffer
* to CSI in the first frame done ISR call. Then in second frame
* done ISR call, it mark the first buffer as frame done for VB2
* and pass the third buffer to CSI. And so on. The bad thing is
* that the first buffer will be written twice and the first frame
* is dropped even the queued buffer is sufficient.
* So, I make some improvement here. Pass the next buffer to CSI
* just follow starting the CSI. In this case, the first frame
* will be stored in first buffer, second frame in second buffer.
* This method is used to avoid dropping the first frame, it
* would also drop frame when lacking of queued buffer.
*/
next_buf = list_next_entry(buf, list);
next_buf->queued_to_csi = true;
sun6i_csi_update_buf_addr(video->csi, next_buf->dma_addr);
spin_unlock_irqrestore(&video->dma_queue_lock, flags);
ret = v4l2_subdev_call(subdev, video, s_stream, 1);
if (ret && ret != -ENOIOCTLCMD)
goto stop_csi_stream;
return 0;
stop_csi_stream:
sun6i_csi_set_stream(video->csi, false);
stop_media_pipeline:
media_pipeline_stop(&video->vdev.entity);
clear_dma_queue:
spin_lock_irqsave(&video->dma_queue_lock, flags);
list_for_each_entry(buf, &video->dma_queue, list)
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
INIT_LIST_HEAD(&video->dma_queue);
spin_unlock_irqrestore(&video->dma_queue_lock, flags);
return ret;
}
static void sun6i_video_stop_streaming(struct vb2_queue *vq)
{
struct sun6i_video *video = vb2_get_drv_priv(vq);
struct v4l2_subdev *subdev;
unsigned long flags;
struct sun6i_csi_buffer *buf;
subdev = sun6i_video_remote_subdev(video, NULL);
if (subdev)
v4l2_subdev_call(subdev, video, s_stream, 0);
sun6i_csi_set_stream(video->csi, false);
media_pipeline_stop(&video->vdev.entity);
/* Release all active buffers */
spin_lock_irqsave(&video->dma_queue_lock, flags);
list_for_each_entry(buf, &video->dma_queue, list)
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
INIT_LIST_HEAD(&video->dma_queue);
spin_unlock_irqrestore(&video->dma_queue_lock, flags);
}
static void sun6i_video_buffer_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct sun6i_csi_buffer *buf =
container_of(vbuf, struct sun6i_csi_buffer, vb);
struct sun6i_video *video = vb2_get_drv_priv(vb->vb2_queue);
unsigned long flags;
spin_lock_irqsave(&video->dma_queue_lock, flags);
buf->queued_to_csi = false;
list_add_tail(&buf->list, &video->dma_queue);
spin_unlock_irqrestore(&video->dma_queue_lock, flags);
}
void sun6i_video_frame_done(struct sun6i_video *video)
{
struct sun6i_csi_buffer *buf;
struct sun6i_csi_buffer *next_buf;
struct vb2_v4l2_buffer *vbuf;
spin_lock(&video->dma_queue_lock);
buf = list_first_entry(&video->dma_queue,
struct sun6i_csi_buffer, list);
if (list_is_last(&buf->list, &video->dma_queue)) {
dev_dbg(video->csi->dev, "Frame droped!\n");
goto unlock;
}
next_buf = list_next_entry(buf, list);
/* If a new buffer (#next_buf) had not been queued to CSI, the old
* buffer (#buf) is still holding by CSI for storing the next
* frame. So, we queue a new buffer (#next_buf) to CSI then wait
* for next ISR call.
*/
if (!next_buf->queued_to_csi) {
next_buf->queued_to_csi = true;
sun6i_csi_update_buf_addr(video->csi, next_buf->dma_addr);
dev_dbg(video->csi->dev, "Frame droped!\n");
goto unlock;
}
list_del(&buf->list);
vbuf = &buf->vb;
vbuf->vb2_buf.timestamp = ktime_get_ns();
vbuf->sequence = video->sequence;
vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE);
/* Prepare buffer for next frame but one. */
if (!list_is_last(&next_buf->list, &video->dma_queue)) {
next_buf = list_next_entry(next_buf, list);
next_buf->queued_to_csi = true;
sun6i_csi_update_buf_addr(video->csi, next_buf->dma_addr);
} else {
dev_dbg(video->csi->dev, "Next frame will be dropped!\n");
}
unlock:
video->sequence++;
spin_unlock(&video->dma_queue_lock);
}
static const struct vb2_ops sun6i_csi_vb2_ops = {
.queue_setup = sun6i_video_queue_setup,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
.buf_prepare = sun6i_video_buffer_prepare,
.start_streaming = sun6i_video_start_streaming,
.stop_streaming = sun6i_video_stop_streaming,
.buf_queue = sun6i_video_buffer_queue,
};
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct sun6i_video *video = video_drvdata(file);
strscpy(cap->driver, "sun6i-video", sizeof(cap->driver));
strscpy(cap->card, video->vdev.name, sizeof(cap->card));
snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
video->csi->dev->of_node->name);
return 0;
}
static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
u32 index = f->index;
if (index >= ARRAY_SIZE(supported_pixformats))
return -EINVAL;
f->pixelformat = supported_pixformats[index];
return 0;
}
static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *fmt)
{
struct sun6i_video *video = video_drvdata(file);
*fmt = video->fmt;
return 0;
}
static int sun6i_video_try_fmt(struct sun6i_video *video,
struct v4l2_format *f)
{
struct v4l2_pix_format *pixfmt = &f->fmt.pix;
int bpp;
if (!is_pixformat_valid(pixfmt->pixelformat))
pixfmt->pixelformat = supported_pixformats[0];
v4l_bound_align_image(&pixfmt->width, MIN_WIDTH, MAX_WIDTH, 1,
&pixfmt->height, MIN_HEIGHT, MAX_WIDTH, 1, 1);
bpp = sun6i_csi_get_bpp(pixfmt->pixelformat);
pixfmt->bytesperline = (pixfmt->width * bpp) >> 3;
pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
if (pixfmt->field == V4L2_FIELD_ANY)
pixfmt->field = V4L2_FIELD_NONE;
pixfmt->colorspace = V4L2_COLORSPACE_RAW;
pixfmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
pixfmt->quantization = V4L2_QUANTIZATION_DEFAULT;
pixfmt->xfer_func = V4L2_XFER_FUNC_DEFAULT;
return 0;
}
static int sun6i_video_set_fmt(struct sun6i_video *video, struct v4l2_format *f)
{
int ret;
ret = sun6i_video_try_fmt(video, f);
if (ret)
return ret;
video->fmt = *f;
return 0;
}
static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct sun6i_video *video = video_drvdata(file);
if (vb2_is_busy(&video->vb2_vidq))
return -EBUSY;
return sun6i_video_set_fmt(video, f);
}
static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct sun6i_video *video = video_drvdata(file);
return sun6i_video_try_fmt(video, f);
}
static int vidioc_enum_input(struct file *file, void *fh,
struct v4l2_input *inp)
{
if (inp->index != 0)
return -EINVAL;
strlcpy(inp->name, "camera", sizeof(inp->name));
inp->type = V4L2_INPUT_TYPE_CAMERA;
return 0;
}
static int vidioc_g_input(struct file *file, void *fh, unsigned int *i)
{
*i = 0;
return 0;
}
static int vidioc_s_input(struct file *file, void *fh, unsigned int i)
{
if (i != 0)
return -EINVAL;
return 0;
}
static const struct v4l2_ioctl_ops sun6i_video_ioctl_ops = {
.vidioc_querycap = vidioc_querycap,
.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
.vidioc_enum_input = vidioc_enum_input,
.vidioc_s_input = vidioc_s_input,
.vidioc_g_input = vidioc_g_input,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_expbuf = vb2_ioctl_expbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
.vidioc_log_status = v4l2_ctrl_log_status,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
/* -----------------------------------------------------------------------------
* V4L2 file operations
*/
static int sun6i_video_open(struct file *file)
{
struct sun6i_video *video = video_drvdata(file);
int ret;
if (mutex_lock_interruptible(&video->lock))
return -ERESTARTSYS;
ret = v4l2_fh_open(file);
if (ret < 0)
goto unlock;
ret = v4l2_pipeline_pm_use(&video->vdev.entity, 1);
if (ret < 0)
goto fh_release;
/* check if already powered */
if (!v4l2_fh_is_singular_file(file))
goto unlock;
ret = sun6i_csi_set_power(video->csi, true);
if (ret < 0)
goto fh_release;
mutex_unlock(&video->lock);
return 0;
fh_release:
v4l2_fh_release(file);
unlock:
mutex_unlock(&video->lock);
return ret;
}
static int sun6i_video_close(struct file *file)
{
struct sun6i_video *video = video_drvdata(file);
bool last_fh;
mutex_lock(&video->lock);
last_fh = v4l2_fh_is_singular_file(file);
_vb2_fop_release(file, NULL);
v4l2_pipeline_pm_use(&video->vdev.entity, 0);
if (last_fh)
sun6i_csi_set_power(video->csi, false);
mutex_unlock(&video->lock);
return 0;
}
static const struct v4l2_file_operations sun6i_video_fops = {
.owner = THIS_MODULE,
.open = sun6i_video_open,
.release = sun6i_video_close,
.unlocked_ioctl = video_ioctl2,
.mmap = vb2_fop_mmap,
.poll = vb2_fop_poll
};
/* -----------------------------------------------------------------------------
* Media Operations
*/
static int sun6i_video_link_validate_get_format(struct media_pad *pad,
struct v4l2_subdev_format *fmt)
{
if (is_media_entity_v4l2_subdev(pad->entity)) {
struct v4l2_subdev *sd =
media_entity_to_v4l2_subdev(pad->entity);
fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
fmt->pad = pad->index;
return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt);
}
return -EINVAL;
}
static int sun6i_video_link_validate(struct media_link *link)
{
struct video_device *vdev = container_of(link->sink->entity,
struct video_device, entity);
struct sun6i_video *video = video_get_drvdata(vdev);
struct v4l2_subdev_format source_fmt;
int ret;
video->mbus_code = 0;
if (!media_entity_remote_pad(link->sink->entity->pads)) {
dev_info(video->csi->dev,
"video node %s pad not connected\n", vdev->name);
return -ENOLINK;
}
ret = sun6i_video_link_validate_get_format(link->source, &source_fmt);
if (ret < 0)
return ret;
if (!sun6i_csi_is_format_supported(video->csi,
video->fmt.fmt.pix.pixelformat,
source_fmt.format.code)) {
dev_err(video->csi->dev,
"Unsupported pixformat: 0x%x with mbus code: 0x%x!\n",
video->fmt.fmt.pix.pixelformat,
source_fmt.format.code);
return -EPIPE;
}
if (source_fmt.format.width != video->fmt.fmt.pix.width ||
source_fmt.format.height != video->fmt.fmt.pix.height) {
dev_err(video->csi->dev,
"Wrong width or height %ux%u (%ux%u expected)\n",
video->fmt.fmt.pix.width, video->fmt.fmt.pix.height,
source_fmt.format.width, source_fmt.format.height);
return -EPIPE;
}
video->mbus_code = source_fmt.format.code;
return 0;
}
static const struct media_entity_operations sun6i_video_media_ops = {
.link_validate = sun6i_video_link_validate
};
int sun6i_video_init(struct sun6i_video *video, struct sun6i_csi *csi,
const char *name)
{
struct video_device *vdev = &video->vdev;
struct vb2_queue *vidq = &video->vb2_vidq;
struct v4l2_format fmt = { 0 };
int ret;
video->csi = csi;
/* Initialize the media entity... */
video->pad.flags = MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT;
vdev->entity.ops = &sun6i_video_media_ops;
ret = media_entity_pads_init(&vdev->entity, 1, &video->pad);
if (ret < 0)
return ret;
mutex_init(&video->lock);
INIT_LIST_HEAD(&video->dma_queue);
spin_lock_init(&video->dma_queue_lock);
video->sequence = 0;
/* Setup default format */
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
fmt.fmt.pix.pixelformat = supported_pixformats[0];
fmt.fmt.pix.width = 1280;
fmt.fmt.pix.height = 720;
fmt.fmt.pix.field = V4L2_FIELD_NONE;
sun6i_video_set_fmt(video, &fmt);
/* Initialize videobuf2 queue */
vidq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
vidq->io_modes = VB2_MMAP | VB2_DMABUF;
vidq->drv_priv = video;
vidq->buf_struct_size = sizeof(struct sun6i_csi_buffer);
vidq->ops = &sun6i_csi_vb2_ops;
vidq->mem_ops = &vb2_dma_contig_memops;
vidq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
vidq->lock = &video->lock;
/* Make sure non-dropped frame */
vidq->min_buffers_needed = 3;
vidq->dev = csi->dev;
ret = vb2_queue_init(vidq);
if (ret) {
v4l2_err(&csi->v4l2_dev, "vb2_queue_init failed: %d\n", ret);
goto clean_entity;
}
/* Register video device */
strlcpy(vdev->name, name, sizeof(vdev->name));
vdev->release = video_device_release_empty;
vdev->fops = &sun6i_video_fops;
vdev->ioctl_ops = &sun6i_video_ioctl_ops;
vdev->vfl_type = VFL_TYPE_GRABBER;
vdev->vfl_dir = VFL_DIR_RX;
vdev->v4l2_dev = &csi->v4l2_dev;
vdev->queue = vidq;
vdev->lock = &video->lock;
vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE;
video_set_drvdata(vdev, video);
ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
if (ret < 0) {
v4l2_err(&csi->v4l2_dev,
"video_register_device failed: %d\n", ret);
goto release_vb2;
}
return 0;
release_vb2:
vb2_queue_release(&video->vb2_vidq);
clean_entity:
media_entity_cleanup(&video->vdev.entity);
mutex_destroy(&video->lock);
return ret;
}
void sun6i_video_cleanup(struct sun6i_video *video)
{
video_unregister_device(&video->vdev);
media_entity_cleanup(&video->vdev.entity);
vb2_queue_release(&video->vb2_vidq);
mutex_destroy(&video->lock);
}

38
drivers/media/platform/sunxi/sun6i-csi/sun6i_video.h Normal file
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@ -0,0 +1,38 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2011-2018 Magewell Electronics Co., Ltd. (Nanjing)
* All rights reserved.
* Author: Yong Deng <yong.deng@magewell.com>
*/
#ifndef __SUN6I_VIDEO_H__
#define __SUN6I_VIDEO_H__
#include <media/v4l2-dev.h>
#include <media/videobuf2-core.h>
struct sun6i_csi;
struct sun6i_video {
struct video_device vdev;
struct media_pad pad;
struct sun6i_csi *csi;
struct mutex lock;
struct vb2_queue vb2_vidq;
spinlock_t dma_queue_lock;
struct list_head dma_queue;
unsigned int sequence;
struct v4l2_format fmt;
u32 mbus_code;
};
int sun6i_video_init(struct sun6i_video *video, struct sun6i_csi *csi,
const char *name);
void sun6i_video_cleanup(struct sun6i_video *video);
void sun6i_video_frame_done(struct sun6i_video *video);
#endif /* __SUN6I_VIDEO_H__ */