Hi Rui,
On Thu, Nov 22, 2018 at 03:18:25PM +0000, Rui Miguel Silva wrote:
> Adds MIPI CSI-2 subdev for i.MX7 to connect with sensors with a MIPI
> CSI-2 interface.
>
> Signed-off-by: Rui Miguel Silva <rui.silva@xxxxxxxxxx>
> ---
> drivers/staging/media/imx/Makefile | 1 +
> drivers/staging/media/imx/imx7-mipi-csis.c | 1135 ++++++++++++++++++++
> 2 files changed, 1136 insertions(+)
> create mode 100644 drivers/staging/media/imx/imx7-mipi-csis.c
>
> diff --git a/drivers/staging/media/imx/Makefile b/drivers/staging/media/imx/Makefile
> index 074f016d3519..d2d909a36239 100644
> --- a/drivers/staging/media/imx/Makefile
> +++ b/drivers/staging/media/imx/Makefile
> @@ -14,3 +14,4 @@ obj-$(CONFIG_VIDEO_IMX_CSI) += imx-media-csi.o
> obj-$(CONFIG_VIDEO_IMX_CSI) += imx6-mipi-csi2.o
>
> obj-$(CONFIG_VIDEO_IMX7_CSI) += imx7-media-csi.o
> +obj-$(CONFIG_VIDEO_IMX7_CSI) += imx7-mipi-csis.o
> diff --git a/drivers/staging/media/imx/imx7-mipi-csis.c b/drivers/staging/media/imx/imx7-mipi-csis.c
> new file mode 100644
> index 000000000000..56963d0c2043
> --- /dev/null
> +++ b/drivers/staging/media/imx/imx7-mipi-csis.c
> @@ -0,0 +1,1135 @@
> +// SPDX-License-Identifier: GPL
> +/*
> + * Freescale i.MX7 SoC series MIPI-CSI V3.3 receiver driver
> + *
> + * Copyright (C) 2018 Linaro Ltd
> + * Copyright (C) 2015-2016 Freescale Semiconductor, Inc. All Rights Reserved.
> + * Copyright (C) 2011 - 2013 Samsung Electronics Co., Ltd.
> + *
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/errno.h>
> +#include <linux/interrupt.h>
> +#include <linux/io.h>
> +#include <linux/irq.h>
> +#include <linux/kernel.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/module.h>
> +#include <linux/of_graph.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/reset.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/spinlock.h>
> +
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-fwnode.h>
> +#include <media/v4l2-subdev.h>
> +
> +#include "imx-media.h"
> +
> +static int debug;
> +module_param(debug, int, 0644);
> +MODULE_PARM_DESC(debug, "Debug level (0-2)");
Could you rely on dynamic debug instead?
> +
> +#define CSIS_DRIVER_NAME "imx7-mipi-csis"
> +#define CSIS_SUBDEV_NAME CSIS_DRIVER_NAME
> +
> +#define CSIS_PAD_SINK 0
> +#define CSIS_PAD_SOURCE 1
> +#define CSIS_PADS_NUM 2
> +
> +#define MIPI_CSIS_DEF_PIX_WIDTH 640
> +#define MIPI_CSIS_DEF_PIX_HEIGHT 480
> +
> +/* Register map definition */
> +
> +/* CSIS common control */
> +#define MIPI_CSIS_CMN_CTRL 0x04
> +#define MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW BIT(16)
> +#define MIPI_CSIS_CMN_CTRL_INTER_MODE BIT(10)
> +#define MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW_CTRL BIT(2)
> +#define MIPI_CSIS_CMN_CTRL_RESET BIT(1)
> +#define MIPI_CSIS_CMN_CTRL_ENABLE BIT(0)
> +
> +#define MIPI_CSIS_CMN_CTRL_LANE_NR_OFFSET 8
> +#define MIPI_CSIS_CMN_CTRL_LANE_NR_MASK (3 << 8)
> +
> +/* CSIS clock control */
> +#define MIPI_CSIS_CLK_CTRL 0x08
> +#define MIPI_CSIS_CLK_CTRL_CLKGATE_TRAIL_CH3(x) ((x) << 28)
> +#define MIPI_CSIS_CLK_CTRL_CLKGATE_TRAIL_CH2(x) ((x) << 24)
> +#define MIPI_CSIS_CLK_CTRL_CLKGATE_TRAIL_CH1(x) ((x) << 20)
> +#define MIPI_CSIS_CLK_CTRL_CLKGATE_TRAIL_CH0(x) ((x) << 16)
> +#define MIPI_CSIS_CLK_CTRL_CLKGATE_EN_MSK (0xf << 4)
> +#define MIPI_CSIS_CLK_CTRL_WCLK_SRC BIT(0)
> +
> +/* CSIS Interrupt mask */
> +#define MIPI_CSIS_INTMSK 0x10
> +#define MIPI_CSIS_INTMSK_EVEN_BEFORE BIT(31)
> +#define MIPI_CSIS_INTMSK_EVEN_AFTER BIT(30)
> +#define MIPI_CSIS_INTMSK_ODD_BEFORE BIT(29)
> +#define MIPI_CSIS_INTMSK_ODD_AFTER BIT(28)
> +#define MIPI_CSIS_INTMSK_FRAME_START BIT(24)
> +#define MIPI_CSIS_INTMSK_FRAME_END BIT(20)
> +#define MIPI_CSIS_INTMSK_ERR_SOT_HS BIT(16)
> +#define MIPI_CSIS_INTMSK_ERR_LOST_FS BIT(12)
> +#define MIPI_CSIS_INTMSK_ERR_LOST_FE BIT(8)
> +#define MIPI_CSIS_INTMSK_ERR_OVER BIT(4)
> +#define MIPI_CSIS_INTMSK_ERR_WRONG_CFG BIT(3)
> +#define MIPI_CSIS_INTMSK_ERR_ECC BIT(2)
> +#define MIPI_CSIS_INTMSK_ERR_CRC BIT(1)
> +#define MIPI_CSIS_INTMSK_ERR_UNKNOWN BIT(0)
> +
> +/* CSIS Interrupt source */
> +#define MIPI_CSIS_INTSRC 0x14
> +#define MIPI_CSIS_INTSRC_EVEN_BEFORE BIT(31)
> +#define MIPI_CSIS_INTSRC_EVEN_AFTER BIT(30)
> +#define MIPI_CSIS_INTSRC_EVEN BIT(30)
> +#define MIPI_CSIS_INTSRC_ODD_BEFORE BIT(29)
> +#define MIPI_CSIS_INTSRC_ODD_AFTER BIT(28)
> +#define MIPI_CSIS_INTSRC_ODD (0x3 << 28)
> +#define MIPI_CSIS_INTSRC_NON_IMAGE_DATA (0xf << 28)
> +#define MIPI_CSIS_INTSRC_FRAME_START BIT(24)
> +#define MIPI_CSIS_INTSRC_FRAME_END BIT(20)
> +#define MIPI_CSIS_INTSRC_ERR_SOT_HS BIT(16)
> +#define MIPI_CSIS_INTSRC_ERR_LOST_FS BIT(12)
> +#define MIPI_CSIS_INTSRC_ERR_LOST_FE BIT(8)
> +#define MIPI_CSIS_INTSRC_ERR_OVER BIT(4)
> +#define MIPI_CSIS_INTSRC_ERR_WRONG_CFG BIT(3)
> +#define MIPI_CSIS_INTSRC_ERR_ECC BIT(2)
> +#define MIPI_CSIS_INTSRC_ERR_CRC BIT(1)
> +#define MIPI_CSIS_INTSRC_ERR_UNKNOWN BIT(0)
> +#define MIPI_CSIS_INTSRC_ERRORS 0xfffff
> +
> +/* D-PHY status control */
> +#define MIPI_CSIS_DPHYSTATUS 0x20
> +#define MIPI_CSIS_DPHYSTATUS_ULPS_DAT BIT(8)
> +#define MIPI_CSIS_DPHYSTATUS_STOPSTATE_DAT BIT(4)
> +#define MIPI_CSIS_DPHYSTATUS_ULPS_CLK BIT(1)
> +#define MIPI_CSIS_DPHYSTATUS_STOPSTATE_CLK BIT(0)
> +
> +/* D-PHY common control */
> +#define MIPI_CSIS_DPHYCTRL 0x24
> +#define MIPI_CSIS_DPHYCTRL_HSS_MASK (0xff << 24)
> +#define MIPI_CSIS_DPHYCTRL_HSS_OFFSET 24
> +#define MIPI_CSIS_DPHYCTRL_SCLKS_MASK (0x3 << 22)
> +#define MIPI_CSIS_DPHYCTRL_SCLKS_OFFSET 22
> +#define MIPI_CSIS_DPHYCTRL_DPDN_SWAP_CLK BIT(6)
> +#define MIPI_CSIS_DPHYCTRL_DPDN_SWAP_DAT BIT(5)
> +#define MIPI_CSIS_DPHYCTRL_ENABLE_DAT BIT(1)
> +#define MIPI_CSIS_DPHYCTRL_ENABLE_CLK BIT(0)
> +#define MIPI_CSIS_DPHYCTRL_ENABLE (0x1f << 0)
> +
> +/* D-PHY Master and Slave Control register Low */
> +#define MIPI_CSIS_DPHYBCTRL_L 0x30
> +/* D-PHY Master and Slave Control register High */
> +#define MIPI_CSIS_DPHYBCTRL_H 0x34
> +/* D-PHY Slave Control register Low */
> +#define MIPI_CSIS_DPHYSCTRL_L 0x38
> +/* D-PHY Slave Control register High */
> +#define MIPI_CSIS_DPHYSCTRL_H 0x3c
> +
> +/* ISP Configuration register */
> +#define MIPI_CSIS_ISPCONFIG_CH0 0x40
> +#define MIPI_CSIS_ISPCONFIG_CH1 0x50
> +#define MIPI_CSIS_ISPCONFIG_CH2 0x60
> +#define MIPI_CSIS_ISPCONFIG_CH3 0x70
> +
> +#define MIPI_CSIS_ISPCFG_MEM_FULL_GAP_MSK (0xff << 24)
> +#define MIPI_CSIS_ISPCFG_MEM_FULL_GAP(x) ((x) << 24)
> +#define MIPI_CSIS_ISPCFG_DOUBLE_CMPNT BIT(12)
> +#define MIPI_CSIS_ISPCFG_ALIGN_32BIT BIT(11)
> +#define MIPI_CSIS_ISPCFG_FMT_YCBCR422_8BIT (0x1e << 2)
> +#define MIPI_CSIS_ISPCFG_FMT_RAW8 (0x2a << 2)
> +#define MIPI_CSIS_ISPCFG_FMT_RAW10 (0x2b << 2)
> +#define MIPI_CSIS_ISPCFG_FMT_RAW12 (0x2c << 2)
> +
> +/* User defined formats, x = 1...4 */
> +#define MIPI_CSIS_ISPCFG_FMT_USER(x) ((0x30 + (x) - 1) << 2)
> +#define MIPI_CSIS_ISPCFG_FMT_MASK (0x3f << 2)
> +
> +/* ISP Image Resolution register */
> +#define MIPI_CSIS_ISPRESOL_CH0 0x44
> +#define MIPI_CSIS_ISPRESOL_CH1 0x54
> +#define MIPI_CSIS_ISPRESOL_CH2 0x64
> +#define MIPI_CSIS_ISPRESOL_CH3 0x74
> +#define CSIS_MAX_PIX_WIDTH 0xffff
> +#define CSIS_MAX_PIX_HEIGHT 0xffff
> +
> +/* ISP SYNC register */
> +#define MIPI_CSIS_ISPSYNC_CH0 0x48
> +#define MIPI_CSIS_ISPSYNC_CH1 0x58
> +#define MIPI_CSIS_ISPSYNC_CH2 0x68
> +#define MIPI_CSIS_ISPSYNC_CH3 0x78
> +
> +#define MIPI_CSIS_ISPSYNC_HSYNC_LINTV_OFFSET 18
> +#define MIPI_CSIS_ISPSYNC_VSYNC_SINTV_OFFSET 12
> +#define MIPI_CSIS_ISPSYNC_VSYNC_EINTV_OFFSET 0
> +
> +/* Non-image packet data buffers */
> +#define MIPI_CSIS_PKTDATA_ODD 0x2000
> +#define MIPI_CSIS_PKTDATA_EVEN 0x3000
> +#define MIPI_CSIS_PKTDATA_SIZE SZ_4K
> +
> +#define DEFAULT_SCLK_CSIS_FREQ 166000000UL
> +
> +enum {
> + ST_POWERED = 1,
> + ST_STREAMING = 2,
> + ST_SUSPENDED = 4,
> +};
> +
> +struct mipi_csis_event {
> + u32 mask;
> + const char * const name;
> + unsigned int counter;
> +};
> +
> +static const struct mipi_csis_event mipi_csis_events[] = {
> + /* Errors */
> + { MIPI_CSIS_INTSRC_ERR_SOT_HS, "SOT Error" },
> + { MIPI_CSIS_INTSRC_ERR_LOST_FS, "Lost Frame Start Error" },
> + { MIPI_CSIS_INTSRC_ERR_LOST_FE, "Lost Frame End Error" },
> + { MIPI_CSIS_INTSRC_ERR_OVER, "FIFO Overflow Error" },
> + { MIPI_CSIS_INTSRC_ERR_WRONG_CFG, "Wrong Configuration Error" },
> + { MIPI_CSIS_INTSRC_ERR_ECC, "ECC Error" },
> + { MIPI_CSIS_INTSRC_ERR_CRC, "CRC Error" },
> + { MIPI_CSIS_INTSRC_ERR_UNKNOWN, "Unknown Error" },
> + /* Non-image data receive events */
> + { MIPI_CSIS_INTSRC_EVEN_BEFORE, "Non-image data before even frame" },
> + { MIPI_CSIS_INTSRC_EVEN_AFTER, "Non-image data after even frame" },
> + { MIPI_CSIS_INTSRC_ODD_BEFORE, "Non-image data before odd frame" },
> + { MIPI_CSIS_INTSRC_ODD_AFTER, "Non-image data after odd frame" },
> + /* Frame start/end */
> + { MIPI_CSIS_INTSRC_FRAME_START, "Frame Start" },
> + { MIPI_CSIS_INTSRC_FRAME_END, "Frame End" },
> +};
> +
> +#define MIPI_CSIS_NUM_EVENTS ARRAY_SIZE(mipi_csis_events)
> +
> +struct csis_hw_reset {
> + struct regmap *src;
> + u8 req_src;
> + u8 rst_bit;
> +};
> +
> +struct csi_state {
> + /* lock elements below */
> + struct mutex lock;
> + /* lock for event handler */
> + spinlock_t slock;
> + struct device *dev;
> + struct media_pad pads[CSIS_PADS_NUM];
> + struct v4l2_subdev mipi_sd;
> + struct v4l2_subdev *src_sd;
> +
> + u8 index;
> + struct platform_device *pdev;
> + struct phy *phy;
> + void __iomem *regs;
> + struct clk *pclk_clk;
> + struct clk *wrap_clk;
> + struct clk *phy_clk;
> + int irq;
> + u32 flags;
> +
> + u32 clk_frequency;
> + u32 hs_settle;
> +
> + struct reset_control *mrst;
> +
> + const struct csis_pix_format *csis_fmt;
> + struct v4l2_mbus_framefmt format_mbus;
> +
> + struct v4l2_fwnode_bus_mipi_csi2 bus;
> +
> + struct mipi_csis_event events[MIPI_CSIS_NUM_EVENTS];
> +
> + struct v4l2_async_notifier subdev_notifier;
> +
> + struct csis_hw_reset hw_reset;
> + struct regulator *mipi_phy_regulator;
> + bool sink_linked;
> +};
> +
> +struct csis_pix_format {
> + unsigned int pix_width_alignment;
> + u32 code;
> + u32 fmt_reg;
> + u8 data_alignment;
> +};
> +
> +static const struct csis_pix_format mipi_csis_formats[] = {
> + {
> + .code = MEDIA_BUS_FMT_SBGGR10_1X10,
> + .fmt_reg = MIPI_CSIS_ISPCFG_FMT_RAW10,
> + .data_alignment = 16,
> + }, {
> + .code = MEDIA_BUS_FMT_VYUY8_2X8,
> + .fmt_reg = MIPI_CSIS_ISPCFG_FMT_YCBCR422_8BIT,
> + .data_alignment = 16,
> + }, {
> + .code = MEDIA_BUS_FMT_SBGGR8_1X8,
> + .fmt_reg = MIPI_CSIS_ISPCFG_FMT_RAW8,
> + .data_alignment = 8,
> + }, {
> + .code = MEDIA_BUS_FMT_YUYV8_2X8,
> + .fmt_reg = MIPI_CSIS_ISPCFG_FMT_YCBCR422_8BIT,
> + .data_alignment = 16,
> + }
> +};
> +
> +#define mipi_csis_write(__csis, __r, __v) writel(__v, (__csis)->regs + (__r))
> +#define mipi_csis_read(__csis, __r) readl((__csis)->regs + (__r))
> +
> +static void dump_regs(struct csi_state *state, const char *label)
> +{
> + u32 cfg;
> + u32 i;
How about unsigned int? Same below.
> + struct {
> + u32 offset;
> + const char * const name;
> + } registers[] = {
> + { 0x04, "CTRL" },
> + { 0x24, "DPHYCTRL" },
> + { 0x08, "CLKCTRL" },
> + { 0x20, "DPHYSTS" },
> + { 0x10, "INTMSK" },
> + { 0x40, "CONFIG_CH0" },
> + { 0xC0, "DBG_CONFIG" },
> + { 0x38, "DPHYSLAVE_L" },
> + { 0x3C, "DPHYSLAVE_H" },
> + };
> +
> + v4l2_info(&state->mipi_sd, "--- %s ---\n", label);
Please use either dev_*() macros or v4l2_*() to print debug messages, but
try to stick to one.
> +
> + for (i = 0; i < ARRAY_SIZE(registers); i++) {
> + cfg = mipi_csis_read(state, registers[i].offset);
> + v4l2_info(&state->mipi_sd, "%12s: 0x%08x 0x%p\n",
> + registers[i].name, cfg, state->regs);
> + }
> +}
> +
> +static struct csi_state *mipi_sd_to_csis_state(struct v4l2_subdev *sdev)
> +{
> + return container_of(sdev, struct csi_state, mipi_sd);
> +}
> +
> +static const struct csis_pix_format *find_csis_format(u32 code)
> +{
> + int i;
> +
> + for (i = 0; i < ARRAY_SIZE(mipi_csis_formats); i++)
> + if (code == mipi_csis_formats[i].code)
> + return &mipi_csis_formats[i];
> + return NULL;
> +}
> +
> +static void mipi_csis_enable_interrupts(struct csi_state *state, bool on)
> +{
> + u32 val = mipi_csis_read(state, MIPI_CSIS_INTMSK);
> +
> + if (on)
> + val |= 0xffffffff;
> + else
> + val &= ~0xffffffff;
Hmm. Isn't this the same as
if (!on)
val = 0;
> + mipi_csis_write(state, MIPI_CSIS_INTMSK, val);
Or:
mipi_csis_write(state, MIPI_CSIS_INTMSK, on ? val : 0);
> +}
> +
> +static void mipi_csis_sw_reset(struct csi_state *state)
> +{
> + u32 val = mipi_csis_read(state, MIPI_CSIS_CMN_CTRL);
> +
> + mipi_csis_write(state, MIPI_CSIS_CMN_CTRL,
> + val | MIPI_CSIS_CMN_CTRL_RESET);
> + usleep_range(10, 20);
> +}
> +
> +static int mipi_csis_phy_init(struct csi_state *state)
> +{
> + state->mipi_phy_regulator = devm_regulator_get(state->dev, "phy");
> +
> + return regulator_set_voltage(state->mipi_phy_regulator, 1000000,
> + 1000000);
> +}
> +
> +static void mipi_csis_phy_reset(struct csi_state *state)
> +{
> + reset_control_assert(state->mrst);
> +
> + msleep(20);
> +
> + reset_control_deassert(state->mrst);
> +}
> +
> +static void mipi_csis_system_enable(struct csi_state *state, int on)
> +{
> + u32 val, mask;
> +
> + val = mipi_csis_read(state, MIPI_CSIS_CMN_CTRL);
> + if (on)
> + val |= MIPI_CSIS_CMN_CTRL_ENABLE;
> + else
> + val &= ~MIPI_CSIS_CMN_CTRL_ENABLE;
> + mipi_csis_write(state, MIPI_CSIS_CMN_CTRL, val);
> +
> + val = mipi_csis_read(state, MIPI_CSIS_DPHYCTRL);
> + val &= ~MIPI_CSIS_DPHYCTRL_ENABLE;
> + if (on) {
> + mask = (1 << (state->bus.num_data_lanes + 1)) - 1;
> + val |= (mask & MIPI_CSIS_DPHYCTRL_ENABLE);
> + }
> + mipi_csis_write(state, MIPI_CSIS_DPHYCTRL, val);
> +}
> +
> +/* Called with the state.lock mutex held */
> +static void __mipi_csis_set_format(struct csi_state *state)
> +{
> + struct v4l2_mbus_framefmt *mf = &state->format_mbus;
> + u32 val;
> +
> + /* Color format */
> + val = mipi_csis_read(state, MIPI_CSIS_ISPCONFIG_CH0);
> + val = (val & ~MIPI_CSIS_ISPCFG_FMT_MASK) | state->csis_fmt->fmt_reg;
> + mipi_csis_write(state, MIPI_CSIS_ISPCONFIG_CH0, val);
> +
> + /* Pixel resolution */
> + val = mf->width | (mf->height << 16);
> + mipi_csis_write(state, MIPI_CSIS_ISPRESOL_CH0, val);
> +}
> +
> +static void mipi_csis_set_hsync_settle(struct csi_state *state, int hs_settle)
> +{
> + u32 val = mipi_csis_read(state, MIPI_CSIS_DPHYCTRL);
> +
> + val = ((val & ~MIPI_CSIS_DPHYCTRL_HSS_MASK) | (hs_settle << 24));
> +
> + mipi_csis_write(state, MIPI_CSIS_DPHYCTRL, val);
> +}
> +
> +static void mipi_csis_set_params(struct csi_state *state)
> +{
> + int lanes = state->bus.num_data_lanes;
> + u32 val;
> +
> + val = mipi_csis_read(state, MIPI_CSIS_CMN_CTRL);
> + val &= ~MIPI_CSIS_CMN_CTRL_LANE_NR_MASK;
> + val |= (lanes - 1) << MIPI_CSIS_CMN_CTRL_LANE_NR_OFFSET;
> + mipi_csis_write(state, MIPI_CSIS_CMN_CTRL, val);
> +
> + __mipi_csis_set_format(state);
> +
> + mipi_csis_set_hsync_settle(state, state->hs_settle);
> +
> + val = mipi_csis_read(state, MIPI_CSIS_ISPCONFIG_CH0);
> + if (state->csis_fmt->data_alignment == 32)
> + val |= MIPI_CSIS_ISPCFG_ALIGN_32BIT;
> + else
> + val &= ~MIPI_CSIS_ISPCFG_ALIGN_32BIT;
> + mipi_csis_write(state, MIPI_CSIS_ISPCONFIG_CH0, val);
> +
> + val = (0 << MIPI_CSIS_ISPSYNC_HSYNC_LINTV_OFFSET) |
> + (0 << MIPI_CSIS_ISPSYNC_VSYNC_SINTV_OFFSET) |
> + (0 << MIPI_CSIS_ISPSYNC_VSYNC_EINTV_OFFSET);
> + mipi_csis_write(state, MIPI_CSIS_ISPSYNC_CH0, val);
> +
> + val = mipi_csis_read(state, MIPI_CSIS_CLK_CTRL);
> + val &= ~MIPI_CSIS_CLK_CTRL_WCLK_SRC;
> + if (state->wrap_clk)
> + val |= MIPI_CSIS_CLK_CTRL_WCLK_SRC;
> + else
> + val &= ~MIPI_CSIS_CLK_CTRL_WCLK_SRC;
> +
> + val |= MIPI_CSIS_CLK_CTRL_CLKGATE_TRAIL_CH0(15);
> + val &= ~MIPI_CSIS_CLK_CTRL_CLKGATE_EN_MSK;
> + mipi_csis_write(state, MIPI_CSIS_CLK_CTRL, val);
> +
> + mipi_csis_write(state, MIPI_CSIS_DPHYBCTRL_L, 0x1f4);
> + mipi_csis_write(state, MIPI_CSIS_DPHYBCTRL_H, 0);
> +
> + /* Update the shadow register. */
> + val = mipi_csis_read(state, MIPI_CSIS_CMN_CTRL);
> + mipi_csis_write(state, MIPI_CSIS_CMN_CTRL,
> + val | MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW |
> + MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW_CTRL);
> +}
> +
> +static void mipi_csis_clk_enable(struct csi_state *state)
> +{
> + clk_prepare_enable(state->pclk_clk);
> + clk_prepare_enable(state->wrap_clk);
> + clk_prepare_enable(state->phy_clk);
clk_bulk_prepare_enable()?
> +}
> +
> +static void mipi_csis_clk_disable(struct csi_state *state)
> +{
> + clk_disable_unprepare(state->pclk_clk);
> + clk_disable_unprepare(state->wrap_clk);
> + clk_disable_unprepare(state->phy_clk);
clk_bulk_disable_unprepare()?
> +}
> +
> +static int mipi_csis_clk_get(struct csi_state *state)
> +{
> + struct device *dev = &state->pdev->dev;
> + int ret;
> +
> + state->pclk_clk = devm_clk_get(dev, "pclk");
> + if (IS_ERR(state->pclk_clk)) {
> + dev_err(dev, "Could not get pclk clock\n");
> + return -ENODEV;
> + }
> +
> + state->wrap_clk = devm_clk_get(dev, "wrap");
> + if (IS_ERR(state->wrap_clk)) {
> + dev_info(dev, "Could not get wrap clock, using pclk\n");
> + state->wrap_clk = NULL;
> + }
> +
> + state->phy_clk = devm_clk_get(dev, "phy");
> + if (IS_ERR(state->phy_clk)) {
> + dev_err(dev, "Could not get mipi phy clock\n");
> + return -ENODEV;
> + }
devm_clk_bulk_get()?
> +
> + /* Set clock rate */
> + ret = clk_set_rate(state->wrap_clk, state->clk_frequency);
> + if (ret < 0)
> + dev_err(dev, "set rate=%d failed: %d\n", state->clk_frequency,
> + ret);
> +
> + return ret;
> +}
> +
> +static void mipi_csis_start_stream(struct csi_state *state)
> +{
> + mipi_csis_sw_reset(state);
> + mipi_csis_set_params(state);
> + mipi_csis_system_enable(state, true);
> + mipi_csis_enable_interrupts(state, true);
> +}
> +
> +static void mipi_csis_stop_stream(struct csi_state *state)
> +{
> + mipi_csis_enable_interrupts(state, false);
> + mipi_csis_system_enable(state, false);
> +}
> +
> +static void mipi_csis_clear_counters(struct csi_state *state)
> +{
> + unsigned long flags;
> + int i;
> +
> + spin_lock_irqsave(&state->slock, flags);
> + for (i = 0; i < MIPI_CSIS_NUM_EVENTS; i++)
> + state->events[i].counter = 0;
> + spin_unlock_irqrestore(&state->slock, flags);
> +}
> +
> +static void mipi_csis_log_counters(struct csi_state *state, bool non_errors)
> +{
> + int i = non_errors ? MIPI_CSIS_NUM_EVENTS : MIPI_CSIS_NUM_EVENTS - 4;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&state->slock, flags);
> +
> + for (i--; i >= 0; i--) {
> + if (state->events[i].counter > 0 || debug)
> + v4l2_info(&state->mipi_sd, "%s events: %d\n",
> + state->events[i].name,
> + state->events[i].counter);
> + }
> + spin_unlock_irqrestore(&state->slock, flags);
> +}
> +
> +/*
> + * V4L2 subdev operations
> + */
> +static int mipi_csis_s_power(struct v4l2_subdev *mipi_sd, int on)
> +{
> + struct csi_state *state = mipi_sd_to_csis_state(mipi_sd);
> + struct device *dev = &state->pdev->dev;
> +
> + v4l2_subdev_call(state->src_sd, core, s_power, on);
> +
> + if (on)
> + return pm_runtime_get_sync(dev);
If your driver supports runtime PM, you shouldn't expose the s_power()
callback for other drivers to use. The driver itself knows better when the
hardware should be powered on and off.
> +
> + return pm_runtime_put_sync(dev);
> +}
> +
> +static int mipi_csis_s_stream(struct v4l2_subdev *mipi_sd, int enable)
> +{
> + struct csi_state *state = mipi_sd_to_csis_state(mipi_sd);
> + int ret = 0;
> +
> + if (enable) {
> + mipi_csis_clear_counters(state);
> + ret = pm_runtime_get_sync(&state->pdev->dev);
This is apparently already handled. You could also call the sub-device's
s_power callback from here (or from the runtime PM callbacks in this
driver). Here is likely a better option.
> + if (ret && ret != 1)
> + return ret;
> + }
> +
> + mutex_lock(&state->lock);
> + if (enable) {
> + if (state->flags & ST_SUSPENDED) {
> + ret = -EBUSY;
> + goto unlock;
> + }
> +
> + mipi_csis_start_stream(state);
> + ret = v4l2_subdev_call(state->src_sd, video, s_stream, 1);
> + if (ret < 0)
> + goto unlock;
> +
> + mipi_csis_log_counters(state, true);
> +
> + state->flags |= ST_STREAMING;
> + } else {
> + v4l2_subdev_call(state->src_sd, video, s_stream, 0);
> + mipi_csis_stop_stream(state);
> + state->flags &= ~ST_STREAMING;
> + if (debug > 0)
> + mipi_csis_log_counters(state, true);
> + }
> +
> +unlock:
> + mutex_unlock(&state->lock);
> + if (!enable)
> + pm_runtime_put(&state->pdev->dev);
> +
> + return ret;
> +}
> +
> +static int mipi_csis_link_setup(struct media_entity *entity,
> + const struct media_pad *local_pad,
> + const struct media_pad *remote_pad, u32 flags)
> +{
> + struct v4l2_subdev *mipi_sd = media_entity_to_v4l2_subdev(entity);
> + struct csi_state *state = mipi_sd_to_csis_state(mipi_sd);
> + struct v4l2_subdev *remote_sd;
> + int ret = 0;
> +
> + dev_dbg(state->dev, "link setup %s -> %s", remote_pad->entity->name,
> + local_pad->entity->name);
> +
> + remote_sd = media_entity_to_v4l2_subdev(remote_pad->entity);
> +
> + mutex_lock(&state->lock);
> +
> + if (local_pad->flags & MEDIA_PAD_FL_SOURCE) {
> + if (flags & MEDIA_LNK_FL_ENABLED) {
> + if (state->sink_linked) {
> + ret = -EBUSY;
> + goto out;
> + }
> + state->sink_linked = true;
> + } else {
> + state->sink_linked = false;
> + }
> + } else {
> + if (flags & MEDIA_LNK_FL_ENABLED) {
> + if (state->src_sd) {
> + ret = -EBUSY;
> + goto out;
> + }
> + state->src_sd = remote_sd;
> + } else {
> + state->src_sd = NULL;
> + }
> + }
> +
> +out:
> + mutex_unlock(&state->lock);
> + return ret;
> +}
> +
> +static int mipi_csis_init_cfg(struct v4l2_subdev *mipi_sd,
> + struct v4l2_subdev_pad_config *cfg)
> +{
> + struct v4l2_mbus_framefmt *mf;
> + int ret;
> + int i;
unsigned int
> +
> + for (i = 0; i < CSIS_PADS_NUM; i++) {
> + mf = v4l2_subdev_get_try_format(mipi_sd, cfg, i);
> +
> + ret = imx_media_init_mbus_fmt(mf, MIPI_CSIS_DEF_PIX_HEIGHT,
> + MIPI_CSIS_DEF_PIX_WIDTH, 0,
> + V4L2_FIELD_NONE, NULL);
> + if (ret < 0)
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static struct csis_pix_format const *mipi_csis_try_format(
> + struct v4l2_subdev *mipi_sd,
> + struct v4l2_mbus_framefmt *mf)
> +{
> + struct csi_state *state = mipi_sd_to_csis_state(mipi_sd);
> + struct csis_pix_format const *csis_fmt;
> +
> + csis_fmt = find_csis_format(mf->code);
> + if (!csis_fmt)
> + csis_fmt = &mipi_csis_formats[0];
> +
> + v4l_bound_align_image(&mf->width, 1, CSIS_MAX_PIX_WIDTH,
> + csis_fmt->pix_width_alignment,
> + &mf->height, 1, CSIS_MAX_PIX_HEIGHT, 1,
> + 0);
> +
> + state->format_mbus.code = csis_fmt->code;
> + state->format_mbus.width = mf->width;
> + state->format_mbus.height = mf->height;
> +
> + return csis_fmt;
> +}
> +
> +static struct v4l2_mbus_framefmt *mipi_csis_get_format(struct csi_state *state,
> + struct v4l2_subdev_pad_config *cfg,
> + enum v4l2_subdev_format_whence which,
> + unsigned int pad)
> +{
> + if (which == V4L2_SUBDEV_FORMAT_TRY)
> + return v4l2_subdev_get_try_format(&state->mipi_sd, cfg, pad);
> +
> + return &state->format_mbus;
> +}
> +
> +static int mipi_csis_set_fmt(struct v4l2_subdev *mipi_sd,
> + struct v4l2_subdev_pad_config *cfg,
> + struct v4l2_subdev_format *sdformat)
> +{
> + struct csi_state *state = mipi_sd_to_csis_state(mipi_sd);
> + struct csis_pix_format const *csis_fmt;
> + struct v4l2_mbus_framefmt *fmt;
> +
> + if (sdformat->pad >= CSIS_PADS_NUM)
> + return -EINVAL;
> +
> + fmt = mipi_csis_get_format(state, cfg, sdformat->which, sdformat->pad);
> +
> + mutex_lock(&state->lock);
> + if (fmt && sdformat->pad == CSIS_PAD_SOURCE) {
> + sdformat->format = *fmt;
> + goto unlock;
> + }
> +
> + csis_fmt = mipi_csis_try_format(mipi_sd, &sdformat->format);
> +
> + sdformat->format = *fmt;
> +
> + if (csis_fmt && sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
> + state->csis_fmt = csis_fmt;
> + else
> + cfg->try_fmt = sdformat->format;
> +
> +unlock:
> + mutex_unlock(&state->lock);
> +
> + return 0;
> +}
> +
> +static int mipi_csis_get_fmt(struct v4l2_subdev *mipi_sd,
> + struct v4l2_subdev_pad_config *cfg,
> + struct v4l2_subdev_format *sdformat)
> +{
> + struct csi_state *state = mipi_sd_to_csis_state(mipi_sd);
> + struct v4l2_mbus_framefmt *fmt;
> +
> + mutex_lock(&state->lock);
> +
> + fmt = mipi_csis_get_format(state, cfg, sdformat->which, sdformat->pad);
> +
> + sdformat->format = *fmt;
> +
> + mutex_unlock(&state->lock);
> +
> + return 0;
> +}
> +
> +static int mipi_csis_log_status(struct v4l2_subdev *mipi_sd)
> +{
> + struct csi_state *state = mipi_sd_to_csis_state(mipi_sd);
> +
> + mutex_lock(&state->lock);
> + mipi_csis_log_counters(state, true);
> + if (debug && (state->flags & ST_POWERED))
> + dump_regs(state, __func__);
> + mutex_unlock(&state->lock);
> +
> + return 0;
> +}
> +
> +static irqreturn_t mipi_csis_irq_handler(int irq, void *dev_id)
> +{
> + struct csi_state *state = dev_id;
> + unsigned long flags;
> + u32 status;
> + int i;
> +
> + status = mipi_csis_read(state, MIPI_CSIS_INTSRC);
> +
> + spin_lock_irqsave(&state->slock, flags);
> +
> + /* Update the event/error counters */
> + if ((status & MIPI_CSIS_INTSRC_ERRORS) || debug) {
unsigned int i;
> + for (i = 0; i < MIPI_CSIS_NUM_EVENTS; i++) {
> + if (!(status & state->events[i].mask))
> + continue;
> + state->events[i].counter++;
> + }
> + }
> + spin_unlock_irqrestore(&state->slock, flags);
> +
> + mipi_csis_write(state, MIPI_CSIS_INTSRC, status);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static int mipi_csi_registered(struct v4l2_subdev *mipi_sd)
> +{
> + struct csi_state *state = mipi_sd_to_csis_state(mipi_sd);
> + int i, ret;
Ditto.
> +
> + for (i = 0; i < CSIS_PADS_NUM; i++) {
> + state->pads[i].flags = (i == CSIS_PAD_SINK) ?
> + MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE;
> + }
> +
> + /* set a default mbus format */
> + ret = imx_media_init_mbus_fmt(&state->format_mbus,
> + MIPI_CSIS_DEF_PIX_HEIGHT,
> + MIPI_CSIS_DEF_PIX_WIDTH, 0,
> + V4L2_FIELD_NONE, NULL);
> + if (ret)
> + return ret;
> +
> + return media_entity_pads_init(&mipi_sd->entity, CSIS_PADS_NUM,
> + state->pads);
> +}
> +
> +static struct v4l2_subdev_core_ops mipi_csis_core_ops = {
const
> + .s_power = mipi_csis_s_power,
> + .log_status = mipi_csis_log_status,
> +};
> +
> +static const struct media_entity_operations mipi_csis_entity_ops = {
> + .link_setup = mipi_csis_link_setup,
> + .link_validate = v4l2_subdev_link_validate,
> +};
> +
> +static struct v4l2_subdev_video_ops mipi_csis_video_ops = {
const
> + .s_stream = mipi_csis_s_stream,
> +};
> +
> +static const struct v4l2_subdev_pad_ops mipi_csis_pad_ops = {
> + .init_cfg = mipi_csis_init_cfg,
> + .get_fmt = mipi_csis_get_fmt,
> + .set_fmt = mipi_csis_set_fmt,
> +};
> +
> +static struct v4l2_subdev_ops mipi_csis_subdev_ops = {
const
> + .core = &mipi_csis_core_ops,
> + .video = &mipi_csis_video_ops,
> + .pad = &mipi_csis_pad_ops,
> +};
> +
> +static const struct v4l2_subdev_internal_ops mipi_csis_internal_ops = {
> + .registered = mipi_csi_registered,
> +};
> +
> +static int mipi_csis_parse_dt(struct platform_device *pdev,
> + struct csi_state *state)
> +{
> + struct device_node *node = pdev->dev.of_node;
> +
> + if (of_property_read_u32(node, "clock-frequency",
> + &state->clk_frequency))
> + state->clk_frequency = DEFAULT_SCLK_CSIS_FREQ;
> +
> + /* Get MIPI PHY resets */
> + state->mrst = devm_reset_control_get_exclusive(&pdev->dev, "mrst");
> + if (IS_ERR(state->mrst))
> + return PTR_ERR(state->mrst);
> +
> + /* Get MIPI CSI-2 bus configration from the endpoint node. */
> + of_property_read_u32(node, "fsl,csis-hs-settle", &state->hs_settle);
> +
> + return 0;
> +}
> +
> +static int mipi_csis_pm_resume(struct device *dev, bool runtime);
> +
> +static int mipi_csis_parse_endpoint(struct device *dev,
> + struct v4l2_fwnode_endpoint *ep,
> + struct v4l2_async_subdev *asd)
> +{
> + struct v4l2_subdev *mipi_sd = dev_get_drvdata(dev);
> + struct csi_state *state = mipi_sd_to_csis_state(mipi_sd);
> +
> + if (!fwnode_device_is_available(asd->match.fwnode)) {
> + v4l2_err(mipi_sd, "remote is not available\n");
> + return -EINVAL;
The __v4l2_async_notifier_parse_fwnode_ep() function already performs the
check; this seems redundant.
> + }
> +
> + if (ep->bus_type != V4L2_MBUS_CSI2_DPHY)
> + v4l2_err(mipi_sd, "invalid bus type, must be MIPI CSI2\n");
> +
> + state->bus = ep->bus.mipi_csi2;
> +
> + dev_dbg(state->dev, "data lanes: %d\n", state->bus.num_data_lanes);
> + dev_dbg(state->dev, "flags: 0x%08x\n", state->bus.flags);
> +
> + return 0;
> +}
> +
> +static int mipi_csis_subdev_init(struct v4l2_subdev *mipi_sd,
> + struct platform_device *pdev,
> + const struct v4l2_subdev_ops *ops)
> +{
> + struct csi_state *state = mipi_sd_to_csis_state(mipi_sd);
> + unsigned int sink_port = 0;
> + int ret;
> +
> + v4l2_subdev_init(mipi_sd, ops);
> + mipi_sd->owner = THIS_MODULE;
> + snprintf(mipi_sd->name, sizeof(mipi_sd->name), "%s.%d",
> + CSIS_SUBDEV_NAME, state->index);
> +
> + mipi_sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
> + mipi_sd->ctrl_handler = NULL;
> +
> + mipi_sd->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
> + mipi_sd->entity.ops = &mipi_csis_entity_ops;
> +
> + mipi_sd->dev = &pdev->dev;
> +
> + state->csis_fmt = &mipi_csis_formats[0];
> + state->format_mbus.code = mipi_csis_formats[0].code;
> + state->format_mbus.width = MIPI_CSIS_DEF_PIX_WIDTH;
> + state->format_mbus.height = MIPI_CSIS_DEF_PIX_HEIGHT;
> + state->format_mbus.field = V4L2_FIELD_NONE;
> +
> + v4l2_set_subdevdata(mipi_sd, &pdev->dev);
> +
> + ret = v4l2_async_register_fwnode_subdev(mipi_sd,
> + sizeof(struct v4l2_async_subdev), &sink_port, 1,
Over 80 characters per line, please wrap.
> + mipi_csis_parse_endpoint);
> + if (ret < 0)
> + dev_err(&pdev->dev, "async fwnode register failed: %d\n", ret);
> +
> + return ret;
> +}
> +
> +static int mipi_csis_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct resource *mem_res;
> + struct csi_state *state;
> + int ret = -ENOMEM;
> +
> + state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
> + if (!state)
> + return -ENOMEM;
> +
> + mutex_init(&state->lock);
> + spin_lock_init(&state->slock);
> +
> + state->pdev = pdev;
> + state->dev = dev;
> +
> + ret = mipi_csis_parse_dt(pdev, state);
> + if (ret < 0) {
> + dev_err(dev, "Failed to parse device tree: %d\n", ret);
mutex_destroy(). Same below.
> + return ret;
> + }
> +
> + mipi_csis_phy_init(state);
> + mipi_csis_phy_reset(state);
> +
> + mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + state->regs = devm_ioremap_resource(dev, mem_res);
> + if (IS_ERR(state->regs))
> + return PTR_ERR(state->regs);
> +
> + state->irq = platform_get_irq(pdev, 0);
> + if (state->irq < 0) {
> + dev_err(dev, "Failed to get irq\n");
> + return state->irq;
> + }
> +
> + ret = mipi_csis_clk_get(state);
> + if (ret < 0)
> + return ret;
> +
> + mipi_csis_clk_enable(state);
> +
> + ret = devm_request_irq(dev, state->irq, mipi_csis_irq_handler,
> + 0, dev_name(dev), state);
> + if (ret) {
> + dev_err(dev, "Interrupt request failed\n");
> + goto disable_clock;
> + }
> +
> + platform_set_drvdata(pdev, &state->mipi_sd);
> +
> + ret = mipi_csis_subdev_init(&state->mipi_sd, pdev,
> + &mipi_csis_subdev_ops);
> + if (ret < 0)
> + goto disable_clock;
> +
> + state->pads[CSIS_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
> + state->pads[CSIS_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
> + ret = media_entity_pads_init(&state->mipi_sd.entity, CSIS_PADS_NUM,
> + state->pads);
> + if (ret < 0)
> + goto unregister_subdev;
> +
> + memcpy(state->events, mipi_csis_events, sizeof(state->events));
> +
> + pm_runtime_enable(dev);
> + if (!pm_runtime_enabled(dev)) {
> + ret = mipi_csis_pm_resume(dev, true);
> + if (ret < 0)
> + goto unregister_all;
> + }
> +
> + dev_info(&pdev->dev, "lanes: %d, hs_settle: %d, wclk: %d, freq: %u\n",
> + state->bus.num_data_lanes, state->hs_settle,
> + state->wrap_clk ? 1 : 0, state->clk_frequency);
> + return 0;
> +
> +unregister_all:
> + media_entity_cleanup(&state->mipi_sd.entity);
> +unregister_subdev:
> + v4l2_async_unregister_subdev(&state->mipi_sd);
> +disable_clock:
> + mipi_csis_clk_disable(state);
> +
> + return ret;
> +}
> +
> +static int mipi_csis_pm_suspend(struct device *dev, bool runtime)
> +{
> + struct platform_device *pdev = to_platform_device(dev);
> + struct v4l2_subdev *mipi_sd = platform_get_drvdata(pdev);
> + struct csi_state *state = mipi_sd_to_csis_state(mipi_sd);
> + int ret = 0;
> +
> + mutex_lock(&state->lock);
> + if (state->flags & ST_POWERED) {
> + mipi_csis_stop_stream(state);
> + ret = regulator_disable(state->mipi_phy_regulator);
> + if (ret)
> + goto unlock;
> + mipi_csis_clk_disable(state);
> + state->flags &= ~ST_POWERED;
> + if (!runtime)
> + state->flags |= ST_SUSPENDED;
> + }
> +
> + unlock:
> + mutex_unlock(&state->lock);
> +
> + return ret ? -EAGAIN : 0;
> +}
> +
> +static int mipi_csis_pm_resume(struct device *dev, bool runtime)
> +{
> + struct platform_device *pdev = to_platform_device(dev);
> + struct v4l2_subdev *mipi_sd = platform_get_drvdata(pdev);
> + struct csi_state *state = mipi_sd_to_csis_state(mipi_sd);
> + int ret = 0;
> +
> + mutex_lock(&state->lock);
> + if (!runtime && !(state->flags & ST_SUSPENDED))
> + goto unlock;
> +
> + if (!(state->flags & ST_POWERED)) {
> + ret = regulator_enable(state->mipi_phy_regulator);
> + if (ret)
> + goto unlock;
> +
> + state->flags |= ST_POWERED;
> + mipi_csis_clk_enable(state);
> + }
> + if (state->flags & ST_STREAMING)
> + mipi_csis_start_stream(state);
> +
> + state->flags &= ~ST_SUSPENDED;
> +
> + unlock:
> + mutex_unlock(&state->lock);
> +
> + return ret ? -EAGAIN : 0;
> +}
> +
> +static int mipi_csis_suspend(struct device *dev)
> +{
> + return mipi_csis_pm_suspend(dev, false);
> +}
> +
> +static int mipi_csis_resume(struct device *dev)
> +{
> + return mipi_csis_pm_resume(dev, false);
> +}
> +
> +static int mipi_csis_runtime_suspend(struct device *dev)
> +{
> + return mipi_csis_pm_suspend(dev, true);
> +}
> +
> +static int mipi_csis_runtime_resume(struct device *dev)
> +{
> + return mipi_csis_pm_resume(dev, true);
> +}
> +
> +static int mipi_csis_remove(struct platform_device *pdev)
> +{
> + struct v4l2_subdev *mipi_sd = platform_get_drvdata(pdev);
> + struct csi_state *state = mipi_sd_to_csis_state(mipi_sd);
> +
> + v4l2_async_unregister_subdev(&state->mipi_sd);
> + v4l2_async_notifier_unregister(&state->subdev_notifier);
> +
> + pm_runtime_disable(&pdev->dev);
> + mipi_csis_pm_suspend(&pdev->dev, true);
> + mipi_csis_clk_disable(state);
> + media_entity_cleanup(&state->mipi_sd.entity);
> + pm_runtime_set_suspended(&pdev->dev);
> +
> + return 0;
> +}
> +
> +static const struct dev_pm_ops mipi_csis_pm_ops = {
> + SET_RUNTIME_PM_OPS(mipi_csis_runtime_suspend, mipi_csis_runtime_resume,
> + NULL)
> + SET_SYSTEM_SLEEP_PM_OPS(mipi_csis_suspend, mipi_csis_resume)
> +};
> +
> +static const struct of_device_id mipi_csis_of_match[] = {
> + { .compatible = "fsl,imx7-mipi-csi2", },
> + { /* sentinel */ },
> +};
> +MODULE_DEVICE_TABLE(of, mipi_csis_of_match);
> +
> +static struct platform_driver mipi_csis_driver = {
> + .probe = mipi_csis_probe,
> + .remove = mipi_csis_remove,
> + .driver = {
> + .of_match_table = mipi_csis_of_match,
> + .name = CSIS_DRIVER_NAME,
> + .pm = &mipi_csis_pm_ops,
> + },
> +};
> +
> +module_platform_driver(mipi_csis_driver);
> +
> +MODULE_DESCRIPTION("i.MX7 MIPI CSI-2 Receiver driver");
> +MODULE_LICENSE("GPL");
> +MODULE_ALIAS("platform:imx7-mipi-csi2");
--
Kind regards,
Sakari Ailus
sakari.ailus@xxxxxxxxxxxxxxx
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