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Message-ID: <genj72cfdjawemablqdhtfz4gbsd6mje6moau3owlgalmhomj3@x6tsebwum5mu>
Date: Thu, 7 Nov 2024 09:48:10 +0100
From: Jacopo Mondi <jacopo.mondi@...asonboard.com>
To: Keke Li <keke.li@...ogic.com>
Cc: Jacopo Mondi <jacopo.mondi@...asonboard.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, linux-media@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, kieran.bingham@...asonboard.com,
laurent.pinchart@...asonboard.com, dan.scally@...asonboard.com
Subject: Re: [PATCH v3 4/9] media: platform: Add c3 mipi adapter driver
Hi Keke
On Wed, Nov 06, 2024 at 01:32:58PM +0800, Keke Li wrote:
> Hi Jacopo
>
> Thanks very much for your reply.
>
> On 2024/11/5 19:24, Jacopo Mondi wrote:
> > [You don't often get email from jacopo.mondi@...asonboard.com. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ]
> >
> > [ EXTERNAL EMAIL ]
> >
> > Hi Keke
> >
> > On Wed, Sep 18, 2024 at 02:07:15PM +0800, Keke Li via B4 Relay wrote:
> > > From: Keke Li <keke.li@...ogic.com>
> > >
> > > This driver mainly responsible for organizing
> > > MIPI data and sending raw data to ISP pipeline.
> > A few questions on the design of this subdevice.
> >
> > In my understanding the adapter provides several functionalities:
> >
> > - Data alignement to match the ISP size constraints
> > - Read from DDR memory or from the CSI-2 RX (direct path)
> > - Write to DDR memory or to the ISP (direct path)
> > - Split data streams to DDR or direct path based on CSI-2 Virtual
> > Channel and Data type.
>
>
> Yes, you are right.
>
> > As I understand the current implementation only supports direct-path
> > to ISP of data sent on VC#0.
>
>
> Read image from DDR and wirte image to DDR are used in WDR mode.
>
> Due to the lack of WDR requirement, This driver only support direct-path.
>
> > Do you plan to expand the adapter subdev with support for mulitple
> > paths ? Is this why you are supporting already a routing table ?
>
> If there is a demand in the future, I will support multiple paths.
>
> But now I attend to only support one path and will drop the set_routing()
> interface.
>
>
> > > Reviewed-by: Daniel Scally <dan.scally@...asonboard.com>
> > > Signed-off-by: Keke Li <keke.li@...ogic.com>
> > > ---
> > > MAINTAINERS | 7 +
> > > drivers/media/platform/amlogic/Kconfig | 1 +
> > > drivers/media/platform/amlogic/Makefile | 1 +
> > > .../media/platform/amlogic/c3-mipi-adapter/Kconfig | 16 +
> > > .../platform/amlogic/c3-mipi-adapter/Makefile | 3 +
> > > .../amlogic/c3-mipi-adapter/c3-mipi-adap.c | 913 +++++++++++++++++++++
> > > 6 files changed, 941 insertions(+)
> > >
> > > diff --git a/MAINTAINERS b/MAINTAINERS
> > > index 9e75874a6e69..31168c05f304 100644
> > > --- a/MAINTAINERS
> > > +++ b/MAINTAINERS
> > > @@ -1209,6 +1209,13 @@ F: Documentation/devicetree/bindings/perf/amlogic,g12-ddr-pmu.yaml
> > > F: drivers/perf/amlogic/
> > > F: include/soc/amlogic/
> > >
> > > +AMLOGIC MIPI ADAPTER DRIVER
> > > +M: Keke Li <keke.li@...ogic.com>
> > > +L: linux-media@...r.kernel.org
> > > +S: Maintained
> > > +F: Documentation/devicetree/bindings/media/amlogic,c3-mipi-adapter.yaml
> > > +F: drivers/media/platform/amlogic/c3-mipi-adapter/
> > > +
> > > AMLOGIC MIPI CSI2 DRIVER
> > > M: Keke Li <keke.li@...ogic.com>
> > > L: linux-media@...r.kernel.org
> > > diff --git a/drivers/media/platform/amlogic/Kconfig b/drivers/media/platform/amlogic/Kconfig
> > > index b7c2de14848b..df09717b28d0 100644
> > > --- a/drivers/media/platform/amlogic/Kconfig
> > > +++ b/drivers/media/platform/amlogic/Kconfig
> > > @@ -2,5 +2,6 @@
> > >
> > > comment "Amlogic media platform drivers"
> > >
> > > +source "drivers/media/platform/amlogic/c3-mipi-adapter/Kconfig"
> > > source "drivers/media/platform/amlogic/c3-mipi-csi2/Kconfig"
> > > source "drivers/media/platform/amlogic/meson-ge2d/Kconfig"
> > > diff --git a/drivers/media/platform/amlogic/Makefile b/drivers/media/platform/amlogic/Makefile
> > > index 4f571ce5d13e..b370154b090c 100644
> > > --- a/drivers/media/platform/amlogic/Makefile
> > > +++ b/drivers/media/platform/amlogic/Makefile
> > > @@ -1,4 +1,5 @@
> > > # SPDX-License-Identifier: GPL-2.0-only
> > >
> > > +obj-y += c3-mipi-adapter/
> > > obj-y += c3-mipi-csi2/
> > > obj-y += meson-ge2d/
> > > diff --git a/drivers/media/platform/amlogic/c3-mipi-adapter/Kconfig b/drivers/media/platform/amlogic/c3-mipi-adapter/Kconfig
> > > new file mode 100644
> > > index 000000000000..bf19059b3543
> > > --- /dev/null
> > > +++ b/drivers/media/platform/amlogic/c3-mipi-adapter/Kconfig
> > > @@ -0,0 +1,16 @@
> > > +# SPDX-License-Identifier: GPL-2.0-only
> > > +
> > > +config VIDEO_C3_MIPI_ADAPTER
> > > + tristate "Amlogic C3 MIPI adapter"
> > > + depends on ARCH_MESON || COMPILE_TEST
> > > + depends on VIDEO_DEV
> > > + depends on OF
> > > + select MEDIA_CONTROLLER
> > > + select V4L2_FWNODE
> > > + select VIDEO_V4L2_SUBDEV_API
> > > + help
> > > + Video4Linux2 driver for Amlogic C3 MIPI adapter.
> > > + C3 MIPI adapter mainly responsible for organizing
> > > + MIPI data and sending raw data to ISP pipeline.
> > > +
> > > + To compile this driver as a module choose m here.
> > > diff --git a/drivers/media/platform/amlogic/c3-mipi-adapter/Makefile b/drivers/media/platform/amlogic/c3-mipi-adapter/Makefile
> > > new file mode 100644
> > > index 000000000000..216fc310c5b4
> > > --- /dev/null
> > > +++ b/drivers/media/platform/amlogic/c3-mipi-adapter/Makefile
> > > @@ -0,0 +1,3 @@
> > > +# SPDX-License-Identifier: GPL-2.0-only
> > > +
> > > +obj-$(CONFIG_VIDEO_C3_MIPI_ADAPTER) += c3-mipi-adap.o
> > > diff --git a/drivers/media/platform/amlogic/c3-mipi-adapter/c3-mipi-adap.c b/drivers/media/platform/amlogic/c3-mipi-adapter/c3-mipi-adap.c
> > > new file mode 100644
> > > index 000000000000..b64eb417c2e2
> > > --- /dev/null
> > > +++ b/drivers/media/platform/amlogic/c3-mipi-adapter/c3-mipi-adap.c
> > > @@ -0,0 +1,913 @@
> > > +// SPDX-License-Identifier: (GPL-2.0-only OR MIT)
> > > +/*
> > > + * Copyright (C) 2024 Amlogic, Inc. All rights reserved
> > > + */
> > > +
> > > +#include <linux/cleanup.h>
> > > +#include <linux/clk.h>
> > > +#include <linux/device.h>
> > > +#include <linux/module.h>
> > > +#include <linux/mutex.h>
> > > +#include <linux/platform_device.h>
> > > +#include <linux/pm_runtime.h>
> > > +
> > > +#include <media/v4l2-async.h>
> > > +#include <media/v4l2-common.h>
> > > +#include <media/v4l2-device.h>
> > > +#include <media/v4l2-fwnode.h>
> > > +#include <media/v4l2-mc.h>
> > > +#include <media/v4l2-subdev.h>
> > > +
> > > +/* C3 adapter submodule definition */
> > > +enum {
> > > + SUBMD_TOP,
> > > + SUBMD_FD,
> > > + SUBMD_RD,
> > > +};
> > > +
> > > +#define ADAP_SUBMD_MASK GENMASK(17, 16)
> > > +#define ADAP_SUBMD_SHIFT 16
> > > +#define ADAP_SUBMD(x) (((x) & (ADAP_SUBMD_MASK)) >> (ADAP_SUBMD_SHIFT))
> > > +#define ADAP_REG_ADDR_MASK GENMASK(15, 0)
> > > +#define ADAP_REG_ADDR(x) ((x) & (ADAP_REG_ADDR_MASK))
> > > +#define ADAP_REG_T(x) ((SUBMD_TOP << ADAP_SUBMD_SHIFT) | (x))
> > > +#define ADAP_REG_F(x) ((SUBMD_FD << ADAP_SUBMD_SHIFT) | (x))
> > > +#define ADAP_REG_R(x) ((SUBMD_RD << ADAP_SUBMD_SHIFT) | (x))
> > > +
> > > +#define MIPI_ADAP_CLOCK_NUM_MAX 3
> > > +#define MIPI_ADAP_SUBDEV_NAME "mipi-adapter"
> > I would add a "c3-" prefix
> >
>
> Will add "c3-" prefix
>
> > > +
> > > +/* C3 MIPI adapter TOP register */
> > > +#define MIPI_ADAPT_DE_CTRL0 ADAP_REG_T(0x40)
> > > +#define ADAP_DE_READ_BYPASS BIT(3)
> > > +#define ADAP_DE_WRITE_BYPASS BIT(7)
> > > +
> > > +/* C3 MIPI adapter FRONTEND register */
> > > +#define CSI2_CLK_RESET ADAP_REG_F(0x00)
> > > +#define ADAP_FD_APPLY_RESET BIT(0)
> > > +#define ADAP_FD_ENABLE BIT(1)
> > > +
> > > +#define CSI2_GEN_CTRL0 ADAP_REG_F(0x04)
> > > +#define ADAP_FD_VIRTUAL_CHN0_EN BIT(0)
> > > +#define ADAP_FD_VIRTUAL_CHN1_EN BIT(1)
> > > +#define ADAP_FD_VIRTUAL_CHN2_EN BIT(2)
> > > +#define ADAP_FD_VIRTUAL_CHN3_EN BIT(3)
> > > +#define ADAP_FD_ENABLE_PACKETS GENMASK(20, 16)
> > > +#define ADAP_FD_ENABLE_RAW BIT(16)
> > > +
> > > +#define CSI2_X_START_END_ISP ADAP_REG_F(0x0c)
> > > +#define ADAP_FD_X_END_MASK GENMASK(31, 16)
> > > +#define ADAP_FD_X_END_SHIFT 16
> > > +#define ADAP_FD_X_END(x) ((x) - 1)
> > > +
> > > +#define CSI2_Y_START_END_ISP ADAP_REG_F(0x10)
> > > +#define ADAP_FD_Y_END_MASK GENMASK(31, 16)
> > > +#define ADAP_FD_Y_END_SHIFT 16
> > > +#define ADAP_FD_Y_END(x) ((x) - 1)
> > > +
> > > +#define CSI2_VC_MODE ADAP_REG_F(0x1c)
> > > +#define ADAP_FD_VS_SEL_VC_MASK GENMASK(19, 16)
> > > +#define ADAP_FD_VS_DIRECT_PATH BIT(16)
> > > +#define ADAP_FD_HS_SEL_VC_MASK GENMASK(23, 20)
> > > +#define ADAP_FD_HS_DIRECT_PATH BIT(20)
> > > +
> > > +/* C3 MIPI adapter READER register */
> > > +#define MIPI_ADAPT_DDR_RD0_CNTL0 ADAP_REG_R(0x00)
> > > +#define ADAP_RD0_MODULE_ENABLE BIT(0)
> > > +#define ADAP_RD0_LINE_STRIDE_MASK GENMASK(13, 4)
> > > +#define ADAP_RD0_LINE_STRIDE_SHIFT 4
> > > +#define ADAP_RD0_SAMPLE_SEL_MASK GENMASK(27, 26)
> > > +#define ADAP_RD0_DATA_IN_VSYNC BIT(26)
> > > +#define ADAP_RD0_BURST_TYPE_MASK GENMASK(29, 28)
> > > +#define ADAP_RD0_BURST_TYPE_SHIFT 28
> > > +#define ADAP_RD0_BURST_TYPE_INRC8 3
> > > +#define ADAP_RD0_FRAME_RD_START BIT(31)
> > > +
> > > +#define MIPI_ADAPT_DDR_RD0_CNTL1 ADAP_REG_R(0x04)
> > > +#define ADAP_RD0_LINE_SIZE_MASK GENMASK(9, 0)
> > > +#define ADAP_RD0_LINE_NUM_MASK GENMASK(28, 16)
> > > +#define ADAP_RD0_LINE_NUM_SHIFT 16
> > > +
> > > +#define MIPI_ADAPT_PIXEL0_CNTL0 ADAP_REG_R(0x80)
> > > +#define ADAP_PIXEL0_WORK_MODE_MASK GENMASK(17, 16)
> > > +#define ADAP_PIXEL0_DIRECT_PATH BIT(16)
> > > +#define ADAP_PIXEL0_DATA_TYPE_MASK GENMASK(25, 20)
> > > +#define ADAP_PIXEL0_DATA_TYPE_SHIFT 20
> > > +#define ADAP_PIXEL0_DATA_TYPE_10BITS 0x2b
> > > +#define ADAP_PIXEL0_DATA_TYPE_12BITS 0x2c
> > > +#define ADAP_PIXEL0_START_ENABLE BIT(31)
> > > +
> > > +#define MIPI_ADAPT_PIXEL0_CNTL1 ADAP_REG_R(0x84)
> > > +#define ADAP_PIXEL0_X_END_MASK GENMASK(15, 0)
> > > +#define ADAP_PIXEL0_X_END(x) ((x) - 1)
> > > +
> > > +#define MIPI_ADAPT_PIXEL0_CNTL2 ADAP_REG_R(0x88)
> > > +#define ADAP_PIXEL0_FIFO_SIZE_MASK GENMASK(9, 0)
> > > +#define ADAP_PIXEL0_PIXEL_NUM_MASK GENMASK(27, 15)
> > > +#define ADAP_PIXEL0_PIXEL_NUM_SHIFT 15
> > > +
> > > +#define MIPI_ADAPT_ALIG_CNTL0 ADAP_REG_R(0x100)
> > > +#define ADAP_ALIG_V_TOTAL_NUM_MASK GENMASK(15, 0)
> > > +/* Need to add a default blank */
> > > +#define ADAP_ALIG_V_TOTAL_NUM(x) ((x) + 64)
> > > +#define ADAP_ALIG_H_TOTAL_NUM_MASK GENMASK(31, 16)
> > > +#define ADAP_ALIG_H_TOTAL_NUM_SHIFT 16
> > > +/* Need to add a default blank */
> > > +#define ADAP_ALIG_H_TOTAL_NUM(x) ((x) + 64)
> > > +
> > > +#define MIPI_ADAPT_ALIG_CNTL1 ADAP_REG_R(0x104)
> > > +#define ADAP_ALIG_HPE_NUM_MASK GENMASK(31, 16)
> > > +#define ADAP_ALIG_HPE_NUM_SHIFT 16
> > > +
> > > +#define MIPI_ADAPT_ALIG_CNTL2 ADAP_REG_R(0x108)
> > > +#define ADAP_ALIG_VPE_NUM_MASK GENMASK(31, 16)
> > > +#define ADAP_ALIG_VPE_NUM_SHIFT 16
> > > +
> > > +#define MIPI_ADAPT_ALIG_CNTL3 ADAP_REG_R(0x10c)
> > > +#define ADAP_ALIG_FRM_ST_PIXEL_MASK GENMASK(15, 0)
> > > +
> > > +#define MIPI_ADAPT_ALIG_CNTL6 ADAP_REG_R(0x118)
> > > +#define ADAP_ALIG_LANE0_ENABLE BIT(0)
> > > +#define ADAP_ALIG_DATA_MODE0_MASK BIT(4)
> > > +#define ADAP_ALIG_DIRECT_MODE BIT(4)
> > > +#define ADAP_ALIG_VDATA0_ENABLE BIT(12)
> > > +#define ADAP_ALIG_VDATA1_ENABLE BIT(13)
> > > +#define ADAP_ALIG_VDATA2_ENABLE BIT(14)
> > > +#define ADAP_ALIG_VDATA3_ENABLE BIT(15)
> > > +
> > > +#define MIPI_ADAPT_ALIG_CNTL8 ADAP_REG_R(0x120)
> > > +#define ADAP_ALIG_FRAME_CONTINUE BIT(5)
> > > +#define ADAP_ALIG_EXC_MASK_DIS BIT(12)
> > > +#define ADAP_ALIG_START_ENABLE BIT(31)
> > > +
> > > +#define MIPI_ADAP_MAX_WIDTH 2888
> > > +#define MIPI_ADAP_MIN_WIDTH 160
> > > +#define MIPI_ADAP_MAX_HEIGHT 2240
> > > +#define MIPI_ADAP_MIN_HEIGHT 120
> > > +#define MIPI_ADAP_DEFAULT_WIDTH 1920
> > > +#define MIPI_ADAP_DEFAULT_HEIGHT 1080
> > > +#define MIPI_ADAP_DEFAULT_FMT MEDIA_BUS_FMT_SRGGB10_1X10
> > > +
> > > +/* C3 MIPI adapter pad list */
> > > +enum {
> > > + MIPI_ADAP_PAD_SINK,
> > > + MIPI_ADAP_PAD_SRC,
> > > + MIPI_ADAP_PAD_MAX
> > > +};
> > > +
> > > +/*
> > > + * struct adap_info - mipi adapter information
> > > + *
> > > + * @clocks: array of mipi adapter clock names
> > > + * @clock_rates: array of mipi adapter clock rate
> > > + * @clock_num: actual clock number
> > > + */
> > > +struct adap_info {
> > > + char *clocks[MIPI_ADAP_CLOCK_NUM_MAX];
> > > + u32 clock_rates[MIPI_ADAP_CLOCK_NUM_MAX];
> > > + u32 clock_num;
> > > +};
> > > +
> > > +/**
> > Here as well you can drop one * from /**
>
>
> Will drop one * from /**
>
> > > + * struct adap_device - mipi adapter platform device
> > > + *
> > > + * @dev: pointer to the struct device
> > > + * @top: mipi adapter top register address
> > > + * @fd: mipi adapter frontend register address
> > > + * @rd: mipi adapter reader register address
> > > + * @clks: array of MIPI adapter clocks
> > > + * @sd: mipi adapter sub-device
> > > + * @pads: mipi adapter sub-device pads
> > > + * @notifier: notifier to register on the v4l2-async API
> > > + * @format: save sub-device format
> > > + * @src_sd: source sub-device
> > > + * @src_sd_pad: source sub-device pad
> > > + * @lock: protect mipi adapter device
> > > + * @info: version-specific MIPI adapter information
> > > + */
> > > +struct adap_device {
> > > + struct device *dev;
> > > + void __iomem *top;
> > > + void __iomem *fd;
> > > + void __iomem *rd;
> > > + struct clk_bulk_data clks[MIPI_ADAP_CLOCK_NUM_MAX];
> > > +
> > > + struct v4l2_subdev sd;
> > > + struct media_pad pads[MIPI_ADAP_PAD_MAX];
> > > + struct v4l2_async_notifier notifier;
> > > + struct v4l2_subdev_format format;
> > > + struct v4l2_subdev *src_sd;
> > > +
> > > + u16 src_sd_pad;
> > > + struct mutex lock; /* Protect adapter device */
> > Most comments on the csi2-rx patch apply to this one as well.
> > In this case, you don't need locking for functions that receive a
> > subdev_state
> >
> Will remove this lock.
> > > + const struct adap_info *info;
> > > +};
> > > +
> > > +/* Format helpers */
> > > +
> > > +struct adap_pix_format {
> > > + u32 code;
> > > + u8 width;
> > I would call it bpp
> Will replace width with bpp
> > > +};
> > > +
> > > +static const struct adap_pix_format c3_mipi_adap_formats[] = {
> > > + { 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 },
> > > +};
> > > +
> > > +static const struct adap_pix_format
> > > +*c3_mipi_adap_find_format(u32 code)
> > > +{
> > > + unsigned int i;
> > > +
> > > + for (i = 0; i < ARRAY_SIZE(c3_mipi_adap_formats); i++)
> > > + if (code == c3_mipi_adap_formats[i].code)
> > > + return &c3_mipi_adap_formats[i];
> > > +
> > > + return NULL;
> > > +}
> > > +
> > > +/* Hardware configuration */
> > > +
> > > +static void c3_mipi_adap_update_bits(struct adap_device *adap, u32 reg,
> > > + u32 mask, u32 val)
> > > +{
> > > + void __iomem *addr;
> > > + u32 orig, tmp;
> > > +
> > > + switch (ADAP_SUBMD(reg)) {
> > > + case SUBMD_TOP:
> > > + addr = adap->top + ADAP_REG_ADDR(reg);
> > > + break;
> > > + case SUBMD_FD:
> > > + addr = adap->fd + ADAP_REG_ADDR(reg);
> > > + break;
> > > + case SUBMD_RD:
> > > + addr = adap->rd + ADAP_REG_ADDR(reg);
> > > + break;
> > > + default:
> > > + dev_err(adap->dev, "Invalid sub-module: %lu\n", ADAP_SUBMD(reg));
> > > + return;
> > > + }
> > > +
> > > + orig = readl(addr);
> > > + tmp = orig & ~mask;
> > > + tmp |= val & mask;
> > > +
> > > + if (tmp != orig)
> > > + writel(tmp, addr);
> > > +}
> > > +
> > > +/* Configure adapter top sub module */
> > > +static void c3_mipi_adap_cfg_top(struct adap_device *adap)
> > > +{
> > > + /* Bypass decompress */
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_DE_CTRL0,
> > > + ADAP_DE_READ_BYPASS, ADAP_DE_READ_BYPASS);
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_DE_CTRL0,
> > > + ADAP_DE_WRITE_BYPASS, ADAP_DE_WRITE_BYPASS);
> > > +}
> > > +
> > > +/* Configure adapter frontend sub module */
> > > +static void c3_mipi_adap_cfg_frontend(struct adap_device *adap,
> > > + struct v4l2_mbus_framefmt *fmt)
> > > +{
> > > + /* The default value of BIT_0 is 1, so need release reset firstly. */
> > > + c3_mipi_adap_update_bits(adap, CSI2_CLK_RESET, ADAP_FD_APPLY_RESET, 0);
> > > +
> > > + c3_mipi_adap_update_bits(adap, CSI2_X_START_END_ISP, ADAP_FD_X_END_MASK,
> > > + ADAP_FD_X_END(fmt->width) << ADAP_FD_X_END_SHIFT);
> > > + c3_mipi_adap_update_bits(adap, CSI2_Y_START_END_ISP, ADAP_FD_Y_END_MASK,
> > > + ADAP_FD_Y_END(fmt->height) << ADAP_FD_Y_END_SHIFT);
> > > +
> > > + /* Select VS and HS signal to direct path */
> > > + c3_mipi_adap_update_bits(adap, CSI2_VC_MODE, ADAP_FD_VS_SEL_VC_MASK,
> > > + ADAP_FD_VS_DIRECT_PATH);
> > > + c3_mipi_adap_update_bits(adap, CSI2_VC_MODE, ADAP_FD_HS_SEL_VC_MASK,
> > > + ADAP_FD_HS_DIRECT_PATH);
> > > +
> > > + /* Enable to receive RAW image */
> > > + c3_mipi_adap_update_bits(adap, CSI2_GEN_CTRL0, ADAP_FD_ENABLE_PACKETS,
> > > + ADAP_FD_ENABLE_RAW);
> > > +
> > > + /* Enable virtual channel 0~3 */
> > > + c3_mipi_adap_update_bits(adap, CSI2_GEN_CTRL0, ADAP_FD_VIRTUAL_CHN0_EN,
> > > + ADAP_FD_VIRTUAL_CHN0_EN);
> > > + c3_mipi_adap_update_bits(adap, CSI2_GEN_CTRL0, ADAP_FD_VIRTUAL_CHN1_EN,
> > > + ADAP_FD_VIRTUAL_CHN1_EN);
> > > + c3_mipi_adap_update_bits(adap, CSI2_GEN_CTRL0, ADAP_FD_VIRTUAL_CHN2_EN,
> > > + ADAP_FD_VIRTUAL_CHN2_EN);
> > > + c3_mipi_adap_update_bits(adap, CSI2_GEN_CTRL0, ADAP_FD_VIRTUAL_CHN3_EN,
> > > + ADAP_FD_VIRTUAL_CHN3_EN);
> > > +}
> > > +
> > > +/* Configure adapter reader sub module */
> > > +static void c3_mipi_adap_cfg_reader(struct adap_device *adap,
> > > + struct v4l2_mbus_framefmt *fmt)
> > > +{
> > > + const struct adap_pix_format *pix_format;
> > > + u32 line_size;
> > > + u8 data_type;
> > > +
> > > + /* Data size for a line, unit: 128 bits */
> > > + pix_format = c3_mipi_adap_find_format(fmt->code);
> > > + line_size = fmt->width * pix_format->width;
> > > + line_size = DIV_ROUND_UP(line_size, 128);
> > > +
> > > + if (pix_format->width == 10) {
> > > + data_type = ADAP_PIXEL0_DATA_TYPE_10BITS;
> > > + } else if (pix_format->width == 12) {
> > > + data_type = ADAP_PIXEL0_DATA_TYPE_12BITS;
> > You should use MIPI_CSI2_DT_RAW10 and MIPI_CSI2_DT_RAW12 from
> > "include/media/mipi-csi2.h"
> >
> OK, Will use MIPI_CSI2_DT_RAW10 and MIPI_CSI2_DT_RAW12.
> > > + } else {
> > > + dev_err(adap->dev, "Invalid raw format width: %u\n", pix_format->width);
> > > + return;
> > > + }
> > > +
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_DDR_RD0_CNTL1,
> > > + ADAP_RD0_LINE_SIZE_MASK, line_size);
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_DDR_RD0_CNTL1, ADAP_RD0_LINE_NUM_MASK,
> > > + fmt->height << ADAP_RD0_LINE_NUM_SHIFT);
> > > +
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_DDR_RD0_CNTL0, ADAP_RD0_MODULE_ENABLE,
> > > + ADAP_RD0_MODULE_ENABLE);
> > I'm not sure I get this. I read this bit as "Enable reading from DDR"
> > while I thought the adapter receives data directly from the CSI-2
> > receiver
>
> This place is a bit confusing.
> I will check this issue and add explanation.
>
>
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_DDR_RD0_CNTL0, ADAP_RD0_LINE_STRIDE_MASK,
> > > + line_size << ADAP_RD0_LINE_STRIDE_SHIFT);
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_DDR_RD0_CNTL0, ADAP_RD0_SAMPLE_SEL_MASK,
> > > + ADAP_RD0_DATA_IN_VSYNC);
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_DDR_RD0_CNTL0, ADAP_RD0_BURST_TYPE_MASK,
> > > + ADAP_RD0_BURST_TYPE_INRC8 << ADAP_RD0_BURST_TYPE_SHIFT);
> > > +
> > > + /* Set data type and work mode */
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_PIXEL0_CNTL0,
> > > + ADAP_PIXEL0_WORK_MODE_MASK, ADAP_PIXEL0_DIRECT_PATH);
> > Ah maybe this setting "RAW from direct path" enables direct path from
> > CSI-2 receiver
> >
>
> PIXEL0 is a sub module in adapter and should be configured.
>
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_PIXEL0_CNTL0, ADAP_PIXEL0_DATA_TYPE_MASK,
> > > + data_type << ADAP_PIXEL0_DATA_TYPE_SHIFT);
> > > +
> > > + /* Set pixel end number */
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_PIXEL0_CNTL1, ADAP_PIXEL0_X_END_MASK,
> > > + ADAP_PIXEL0_X_END(fmt->width));
> > > +
> > > + /* Set line pixel number and reader fifo size */
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_PIXEL0_CNTL2,
> > > + ADAP_PIXEL0_FIFO_SIZE_MASK, line_size);
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_PIXEL0_CNTL2, ADAP_PIXEL0_PIXEL_NUM_MASK,
> > > + fmt->width << ADAP_PIXEL0_PIXEL_NUM_SHIFT);
> > > +
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL0, ADAP_ALIG_V_TOTAL_NUM_MASK,
> > > + ADAP_ALIG_V_TOTAL_NUM(fmt->width));
> > What are the ISP alignment requirements ?
> >
> > #define ADAP_ALIG_V_TOTAL_NUM(x) ((x) + 64)
> >
> > Are you aligning or just adding 64 here ?
>
>
> ISP hardware requires at least 40 v-blanks,
Ok, now I see the requirements: 40 v-blanks, 64 h-blanks.
>
> so here add 64 to ensure ISP can function properly.
>
However I read the register ALIGN_CNTL0 to be described as v_total_num
and h_total_num which makes me think the actual image data are
expanded to the desired values ? Or maybe it's just
to add enough processing margins to the ISP ?
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL0, ADAP_ALIG_H_TOTAL_NUM_MASK,
> > > + ADAP_ALIG_H_TOTAL_NUM(fmt->height)
> > > + << ADAP_ALIG_H_TOTAL_NUM_SHIFT);
> > > +
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL1, ADAP_ALIG_HPE_NUM_MASK,
> > > + fmt->width << ADAP_ALIG_HPE_NUM_SHIFT);
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL2, ADAP_ALIG_VPE_NUM_MASK,
> > > + fmt->height << ADAP_ALIG_VPE_NUM_SHIFT);
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL3,
> > > + ADAP_ALIG_FRM_ST_PIXEL_MASK, fmt->width);
This is also something I'm not sure I get. The registers seems to be
there to skip reading a number of lines and pixels at the beginning of
the frame. It however only take effect if frame_sync_en =1 something
the driver doesn't set ?
> > > +
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL6,
> > > + ADAP_ALIG_LANE0_ENABLE, ADAP_ALIG_LANE0_ENABLE);
> > > +
> > > + /* Select direct mode */
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL6,
> > > + ADAP_ALIG_DATA_MODE0_MASK, ADAP_ALIG_DIRECT_MODE);
> > > +
> > > + /* Enable vdata 0~3 */
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL6,
> > > + ADAP_ALIG_VDATA0_ENABLE, ADAP_ALIG_VDATA0_ENABLE);
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL6,
> > > + ADAP_ALIG_VDATA1_ENABLE, ADAP_ALIG_VDATA1_ENABLE);
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL6,
> > > + ADAP_ALIG_VDATA2_ENABLE, ADAP_ALIG_VDATA2_ENABLE);
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL6,
> > > + ADAP_ALIG_VDATA3_ENABLE, ADAP_ALIG_VDATA2_ENABLE);
> > For my education could you tell what these bit do ?
> Will add explanation.
Thanks, I presume it's about controlling the internl bus between the
adapter and the ISP. A comment on how it works would be apreciated.
Thanks
j
> > > +
> > > + /* continue mode and disable hold counter */
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL8,
> > > + ADAP_ALIG_FRAME_CONTINUE, ADAP_ALIG_FRAME_CONTINUE);
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL8,
> > > + ADAP_ALIG_EXC_MASK_DIS, ADAP_ALIG_EXC_MASK_DIS);
> > > +}
> > > +
> > > +static void c3_mipi_adap_start_stream(struct adap_device *adap)
> > > +{
> > > + /* Enable to start and will auto clear to 0 */
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL8,
> > > + ADAP_ALIG_START_ENABLE, ADAP_ALIG_START_ENABLE);
> > > +
> > > + /* Enable to start and will auto clear to 0 */
> > > + c3_mipi_adap_update_bits(adap, MIPI_ADAPT_PIXEL0_CNTL0,
> > > + ADAP_PIXEL0_START_ENABLE, ADAP_PIXEL0_START_ENABLE);
> > > +
> > > + /* Enable frontend */
> > > + c3_mipi_adap_update_bits(adap, CSI2_CLK_RESET,
> > > + ADAP_FD_ENABLE, ADAP_FD_ENABLE);
> > > +}
> > > +
> > > +static void c3_mipi_adap_cfg_format(struct adap_device *adap)
> > > +{
> > > + struct v4l2_subdev_format *format = &adap->format;
> > > +
> > > + c3_mipi_adap_cfg_top(adap);
> > > + c3_mipi_adap_cfg_frontend(adap, &format->format);
> > > + c3_mipi_adap_cfg_reader(adap, &format->format);
> > > +}
> > > +
> > > +/* V4L2 subdev operations */
> > > +
> > > +static int c3_mipi_adap_enable_streams(struct v4l2_subdev *sd,
> > > + struct v4l2_subdev_state *state,
> > > + u32 pad, u64 streams_mask)
> > > +{
> > > + struct adap_device *adap = v4l2_get_subdevdata(sd);
> > > + u64 sink_streams;
> > > + int ret;
> > > +
> > > + guard(mutex)(&adap->lock);
> > > +
> > > + pm_runtime_resume_and_get(adap->dev);
> > > +
> > > + c3_mipi_adap_cfg_format(adap);
> > > + c3_mipi_adap_start_stream(adap);
> > > +
> > > + sink_streams = v4l2_subdev_state_xlate_streams(state, pad,
> > > + MIPI_ADAP_PAD_SINK,
> > > + &streams_mask);
> > > + ret = v4l2_subdev_enable_streams(adap->src_sd,
> > > + adap->src_sd_pad,
> > > + sink_streams);
> > > + if (ret) {
> > > + pm_runtime_put(adap->dev);
> > > + return ret;
> > > + }
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int c3_mipi_adap_disable_streams(struct v4l2_subdev *sd,
> > > + struct v4l2_subdev_state *state,
> > > + u32 pad, u64 streams_mask)
> > > +{
> > > + struct adap_device *adap = v4l2_get_subdevdata(sd);
> > > + u64 sink_streams;
> > > + int ret;
> > > +
> > > + guard(mutex)(&adap->lock);
> > > +
> > > + sink_streams = v4l2_subdev_state_xlate_streams(state, pad,
> > > + MIPI_ADAP_PAD_SINK,
> > > + &streams_mask);
> > > + ret = v4l2_subdev_disable_streams(adap->src_sd,
> > > + adap->src_sd_pad,
> > > + sink_streams);
> > > + if (ret)
> > > + dev_err(adap->dev, "Failed to disable %s\n", adap->src_sd->name);
> > > +
> > > + pm_runtime_put(adap->dev);
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static int c3_mipi_adap_cfg_routing(struct v4l2_subdev *sd,
> > > + struct v4l2_subdev_state *state,
> > > + struct v4l2_subdev_krouting *routing)
> > > +{
> > > + static const struct v4l2_mbus_framefmt format = {
> > > + .width = MIPI_ADAP_DEFAULT_WIDTH,
> > > + .height = MIPI_ADAP_DEFAULT_HEIGHT,
> > > + .code = MIPI_ADAP_DEFAULT_FMT,
> > > + .field = V4L2_FIELD_NONE,
> > > + .colorspace = V4L2_COLORSPACE_RAW,
> > > + .ycbcr_enc = V4L2_YCBCR_ENC_601,
> > > + .quantization = V4L2_QUANTIZATION_LIM_RANGE,
> > > + .xfer_func = V4L2_XFER_FUNC_NONE,
> > > + };
> > > + int ret;
> > > +
> > > + ret = v4l2_subdev_routing_validate(sd, routing,
> > > + V4L2_SUBDEV_ROUTING_ONLY_1_TO_1);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + ret = v4l2_subdev_set_routing_with_fmt(sd, state, routing, &format);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int c3_mipi_adap_init_routing(struct v4l2_subdev *sd,
> > > + struct v4l2_subdev_state *state)
> > > +{
> > > + struct v4l2_subdev_route routes;
> > > + struct v4l2_subdev_krouting routing;
> > > +
> > > + routes.sink_pad = MIPI_ADAP_PAD_SINK;
> > > + routes.sink_stream = 0;
> > > + routes.source_pad = MIPI_ADAP_PAD_SRC;
> > > + routes.source_stream = 0;
> > > + routes.flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE;
> > > +
> > > + routing.num_routes = 1;
> > > + routing.routes = &routes;
> > > +
> > > + return c3_mipi_adap_cfg_routing(sd, state, &routing);
> > > +}
> > Same comments as per the CSI-2 Rx, do you need to allow set routing
> > when a single route in enabled and valid ?
> >
>
> Will drop the set_routing() interface.
>
> > > +
> > > +static int c3_mipi_adap_set_routing(struct v4l2_subdev *sd,
> > > + struct v4l2_subdev_state *state,
> > > + enum v4l2_subdev_format_whence which,
> > > + struct v4l2_subdev_krouting *routing)
> > > +{
> > > + bool is_streaming = v4l2_subdev_is_streaming(sd);
> > > +
> > > + if (which == V4L2_SUBDEV_FORMAT_ACTIVE && is_streaming)
> > > + return -EBUSY;
> > > +
> > > + return c3_mipi_adap_cfg_routing(sd, state, routing);
> > > +}
> > > +
> > > +static int c3_mipi_adap_enum_mbus_code(struct v4l2_subdev *sd,
> > > + struct v4l2_subdev_state *state,
> > > + struct v4l2_subdev_mbus_code_enum *code)
> > > +{
> > > + switch (code->pad) {
> > > + case MIPI_ADAP_PAD_SINK:
> > > + if (code->index >= ARRAY_SIZE(c3_mipi_adap_formats))
> > > + return -EINVAL;
> > > +
> > > + code->code = c3_mipi_adap_formats[code->index].code;
> > > + break;
> > > + case MIPI_ADAP_PAD_SRC:
> > > + struct v4l2_mbus_framefmt *fmt;
> > > +
> > > + if (code->index > 0)
> > > + return -EINVAL;
> > > +
> > > + fmt = v4l2_subdev_state_get_format(state, code->pad);
> > > + code->code = fmt->code;
> > > + break;
> > > + default:
> > > + return -EINVAL;
> > > + }
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int c3_mipi_adap_set_fmt(struct v4l2_subdev *sd,
> > > + struct v4l2_subdev_state *state,
> > > + struct v4l2_subdev_format *format)
> > > +{
> > > + struct adap_device *adap = v4l2_get_subdevdata(sd);
> > > + struct v4l2_mbus_framefmt *fmt;
> > > + const struct adap_pix_format *pix_format;
> > > +
> > > + if (format->pad != MIPI_ADAP_PAD_SINK)
> > > + return v4l2_subdev_get_fmt(sd, state, format);
> > > +
> > > + pix_format = c3_mipi_adap_find_format(format->format.code);
> > > + if (!pix_format)
> > > + pix_format = &c3_mipi_adap_formats[0];
> > > +
> > > + fmt = v4l2_subdev_state_get_format(state, format->pad);
> > > + fmt->code = pix_format->code;
> > > + fmt->width = clamp_t(u32, format->format.width,
> > > + MIPI_ADAP_MIN_WIDTH, MIPI_ADAP_MAX_WIDTH);
> > > + fmt->height = clamp_t(u32, format->format.height,
> > > + MIPI_ADAP_MIN_HEIGHT, MIPI_ADAP_MAX_HEIGHT);
> > > +
> > > + format->format = *fmt;
> > > +
> > > + /* Synchronize the format to source pad */
> > > + fmt = v4l2_subdev_state_get_format(state, MIPI_ADAP_PAD_SRC);
> > > + *fmt = format->format;
> > > +
> > > + adap->format = *format;
> > There is not need to store the format in the driver-specific
> > structure. You use it c3_mipi_adap_cfg_format() called by
> > c3_mipi_adap_enable_streams() which receives a subdev_state where the format
> > is stored already.
> >
> > Thanks
> > j
>
>
> Will remove the adap->format
>
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int c3_mipi_adap_init_state(struct v4l2_subdev *sd,
> > > + struct v4l2_subdev_state *state)
> > > +{
> > > + struct v4l2_mbus_framefmt *sink_fmt;
> > > + struct v4l2_mbus_framefmt *src_fmt;
> > > +
> > > + sink_fmt = v4l2_subdev_state_get_format(state, MIPI_ADAP_PAD_SINK);
> > > + src_fmt = v4l2_subdev_state_get_format(state, MIPI_ADAP_PAD_SRC);
> > > +
> > > + sink_fmt->width = MIPI_ADAP_DEFAULT_WIDTH;
> > > + sink_fmt->height = MIPI_ADAP_DEFAULT_HEIGHT;
> > > + sink_fmt->field = V4L2_FIELD_NONE;
> > > + sink_fmt->code = MIPI_ADAP_DEFAULT_FMT;
> > > + sink_fmt->colorspace = V4L2_COLORSPACE_RAW;
> > > + sink_fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(sink_fmt->colorspace);
> > > + sink_fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(sink_fmt->colorspace);
> > > + sink_fmt->quantization =
> > > + V4L2_MAP_QUANTIZATION_DEFAULT(false, sink_fmt->colorspace,
> > > + sink_fmt->ycbcr_enc);
> > > + *src_fmt = *sink_fmt;
> > > +
> > > + return c3_mipi_adap_init_routing(sd, state);
> > > +}
> > > +
> > > +static const struct v4l2_subdev_pad_ops c3_mipi_adap_pad_ops = {
> > > + .enum_mbus_code = c3_mipi_adap_enum_mbus_code,
> > > + .get_fmt = v4l2_subdev_get_fmt,
> > > + .set_fmt = c3_mipi_adap_set_fmt,
> > > + .set_routing = c3_mipi_adap_set_routing,
> > > + .enable_streams = c3_mipi_adap_enable_streams,
> > > + .disable_streams = c3_mipi_adap_disable_streams,
> > > +};
> > > +
> > > +static const struct v4l2_subdev_ops c3_mipi_adap_subdev_ops = {
> > > + .pad = &c3_mipi_adap_pad_ops,
> > > +};
> > > +
> > > +static const struct v4l2_subdev_internal_ops c3_mipi_adap_internal_ops = {
> > > + .init_state = c3_mipi_adap_init_state,
> > > +};
> > > +
> > > +/* Media entity operations */
> > > +static const struct media_entity_operations c3_mipi_adap_entity_ops = {
> > > + .link_validate = v4l2_subdev_link_validate,
> > > +};
> > > +
> > > +/* PM runtime */
> > > +
> > > +static int __maybe_unused c3_mipi_adap_runtime_suspend(struct device *dev)
> > > +{
> > > + struct adap_device *adap = dev_get_drvdata(dev);
> > > +
> > > + clk_bulk_disable_unprepare(adap->info->clock_num, adap->clks);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int __maybe_unused c3_mipi_adap_runtime_resume(struct device *dev)
> > > +{
> > > + struct adap_device *adap = dev_get_drvdata(dev);
> > > +
> > > + return clk_bulk_prepare_enable(adap->info->clock_num, adap->clks);
> > > +}
> > > +
> > > +static const struct dev_pm_ops c3_mipi_adap_pm_ops = {
> > > + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
> > > + pm_runtime_force_resume)
> > > + SET_RUNTIME_PM_OPS(c3_mipi_adap_runtime_suspend,
> > > + c3_mipi_adap_runtime_resume, NULL)
> > > +};
> > > +
> > > +/* Probe/remove & platform driver */
> > > +
> > > +static int c3_mipi_adap_subdev_init(struct adap_device *adap)
> > > +{
> > > + struct v4l2_subdev *sd = &adap->sd;
> > > + int ret;
> > > +
> > > + v4l2_subdev_init(sd, &c3_mipi_adap_subdev_ops);
> > > + sd->owner = THIS_MODULE;
> > > + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
> > > + sd->internal_ops = &c3_mipi_adap_internal_ops;
> > > + snprintf(sd->name, sizeof(sd->name), "%s", MIPI_ADAP_SUBDEV_NAME);
> > > +
> > > + sd->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
> > > + sd->entity.ops = &c3_mipi_adap_entity_ops;
> > > +
> > > + sd->dev = adap->dev;
> > > + v4l2_set_subdevdata(sd, adap);
> > > +
> > > + adap->pads[MIPI_ADAP_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
> > > + adap->pads[MIPI_ADAP_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE;
> > > + ret = media_entity_pads_init(&sd->entity, MIPI_ADAP_PAD_MAX, adap->pads);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + ret = v4l2_subdev_init_finalize(sd);
> > > + if (ret) {
> > > + media_entity_cleanup(&sd->entity);
> > > + return ret;
> > > + }
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static void c3_mipi_adap_subdev_deinit(struct adap_device *adap)
> > > +{
> > > + v4l2_subdev_cleanup(&adap->sd);
> > > + media_entity_cleanup(&adap->sd.entity);
> > > +}
> > > +
> > > +/* Subdev notifier register */
> > > +static int c3_mipi_adap_notify_bound(struct v4l2_async_notifier *notifier,
> > > + struct v4l2_subdev *sd,
> > > + struct v4l2_async_connection *asc)
> > > +{
> > > + struct adap_device *adap = v4l2_get_subdevdata(notifier->sd);
> > > + struct media_pad *sink = &adap->sd.entity.pads[MIPI_ADAP_PAD_SINK];
> > > + int ret;
> > > +
> > > + ret = media_entity_get_fwnode_pad(&sd->entity,
> > > + sd->fwnode, MEDIA_PAD_FL_SOURCE);
> > > + if (ret < 0) {
> > > + dev_err(adap->dev, "Failed to find pad for %s\n", sd->name);
> > > + return ret;
> > > + }
> > > +
> > > + adap->src_sd = sd;
> > > + adap->src_sd_pad = ret;
> > > +
> > > + return v4l2_create_fwnode_links_to_pad(sd, sink, MEDIA_LNK_FL_ENABLED |
> > > + MEDIA_LNK_FL_IMMUTABLE);
> > > +}
> > > +
> > > +static const struct v4l2_async_notifier_operations c3_mipi_adap_notify_ops = {
> > > + .bound = c3_mipi_adap_notify_bound,
> > > +};
> > > +
> > > +static int c3_mipi_adap_async_register(struct adap_device *adap)
> > > +{
> > > + struct v4l2_async_connection *asc;
> > > + struct fwnode_handle *ep;
> > > + int ret;
> > > +
> > > + v4l2_async_subdev_nf_init(&adap->notifier, &adap->sd);
> > > +
> > > + ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(adap->dev), 0, 0,
> > > + FWNODE_GRAPH_ENDPOINT_NEXT);
> > > + if (!ep)
> > > + return -ENOTCONN;
> > > +
> > > + asc = v4l2_async_nf_add_fwnode_remote(&adap->notifier, ep,
> > > + struct v4l2_async_connection);
> > > + if (IS_ERR(asc)) {
> > > + ret = PTR_ERR(asc);
> > > + goto err_put_handle;
> > > + }
> > > +
> > > + adap->notifier.ops = &c3_mipi_adap_notify_ops;
> > > + ret = v4l2_async_nf_register(&adap->notifier);
> > > + if (ret)
> > > + goto err_cleanup_nf;
> > > +
> > > + ret = v4l2_async_register_subdev(&adap->sd);
> > > + if (ret)
> > > + goto err_unregister_nf;
> > > +
> > > + fwnode_handle_put(ep);
> > > +
> > > + return 0;
> > > +
> > > +err_unregister_nf:
> > > + v4l2_async_nf_unregister(&adap->notifier);
> > > +err_cleanup_nf:
> > > + v4l2_async_nf_cleanup(&adap->notifier);
> > > +err_put_handle:
> > > + fwnode_handle_put(ep);
> > > + return ret;
> > > +}
> > > +
> > > +static void c3_mipi_adap_async_unregister(struct adap_device *adap)
> > > +{
> > > + v4l2_async_unregister_subdev(&adap->sd);
> > > + v4l2_async_nf_unregister(&adap->notifier);
> > > + v4l2_async_nf_cleanup(&adap->notifier);
> > > +}
> > > +
> > > +static int c3_mipi_adap_ioremap_resource(struct adap_device *adap)
> > > +{
> > > + struct device *dev = adap->dev;
> > > + struct platform_device *pdev = to_platform_device(dev);
> > > +
> > > + adap->top = devm_platform_ioremap_resource_byname(pdev, "top");
> > > + if (IS_ERR(adap->top))
> > > + return PTR_ERR(adap->top);
> > > +
> > > + adap->fd = devm_platform_ioremap_resource_byname(pdev, "fd");
> > > + if (IS_ERR(adap->fd))
> > > + return PTR_ERR(adap->fd);
> > > +
> > > + adap->rd = devm_platform_ioremap_resource_byname(pdev, "rd");
> > > + if (IS_ERR(adap->rd))
> > > + return PTR_ERR(adap->rd);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int c3_mipi_adap_configure_clocks(struct adap_device *adap)
> > > +{
> > > + const struct adap_info *info = adap->info;
> > > + int ret;
> > > + u32 i;
> > > +
> > > + for (i = 0; i < info->clock_num; i++)
> > > + adap->clks[i].id = info->clocks[i];
> > > +
> > > + ret = devm_clk_bulk_get(adap->dev, info->clock_num, adap->clks);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + for (i = 0; i < info->clock_num; i++) {
> > > + if (!info->clock_rates[i])
> > > + continue;
> > > + ret = clk_set_rate(adap->clks[i].clk, info->clock_rates[i]);
> > > + if (ret) {
> > > + dev_err(adap->dev, "Failed to set %s rate %u\n", info->clocks[i],
> > > + info->clock_rates[i]);
> > > + return ret;
> > > + }
> > > + }
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int c3_mipi_adap_probe(struct platform_device *pdev)
> > > +{
> > > + struct device *dev = &pdev->dev;
> > > + struct adap_device *adap;
> > > + int ret;
> > > +
> > > + adap = devm_kzalloc(dev, sizeof(*adap), GFP_KERNEL);
> > > + if (!adap)
> > > + return -ENOMEM;
> > > +
> > > + adap->info = of_device_get_match_data(dev);
> > > + adap->dev = dev;
> > > +
> > > + ret = c3_mipi_adap_ioremap_resource(adap);
> > > + if (ret)
> > > + return dev_err_probe(dev, ret, "Failed to ioremap resource\n");
> > > +
> > > + ret = c3_mipi_adap_configure_clocks(adap);
> > > + if (ret)
> > > + return dev_err_probe(dev, ret, "Failed to configure clocks\n");
> > > +
> > > + platform_set_drvdata(pdev, adap);
> > > +
> > > + mutex_init(&adap->lock);
> > > + pm_runtime_enable(dev);
> > > +
> > > + ret = c3_mipi_adap_subdev_init(adap);
> > > + if (ret < 0)
> > > + goto err_disable_runtime_pm;
> > > +
> > > + ret = c3_mipi_adap_async_register(adap);
> > > + if (ret < 0)
> > > + goto err_deinit_subdev;
> > > +
> > > + return 0;
> > > +
> > > +err_deinit_subdev:
> > > + c3_mipi_adap_subdev_deinit(adap);
> > > +err_disable_runtime_pm:
> > > + pm_runtime_disable(dev);
> > > + mutex_destroy(&adap->lock);
> > > + return ret;
> > > +};
> > > +
> > > +static void c3_mipi_adap_remove(struct platform_device *pdev)
> > > +{
> > > + struct adap_device *adap = platform_get_drvdata(pdev);
> > > +
> > > + c3_mipi_adap_async_unregister(adap);
> > > + c3_mipi_adap_subdev_deinit(adap);
> > > +
> > > + pm_runtime_disable(&pdev->dev);
> > > + mutex_destroy(&adap->lock);
> > > +};
> > > +
> > > +static const struct adap_info c3_mipi_adap_info = {
> > > + .clocks = {"vapb", "isp0"},
> > > + .clock_rates = {0, 400000000},
> > > + .clock_num = 2
> > > +};
> > > +
> > > +static const struct of_device_id c3_mipi_adap_of_match[] = {
> > > + { .compatible = "amlogic,c3-mipi-adapter",
> > > + .data = &c3_mipi_adap_info },
> > > + { },
> > > +};
> > > +MODULE_DEVICE_TABLE(of, c3_mipi_adap_of_match);
> > > +
> > > +static struct platform_driver c3_mipi_adap_driver = {
> > > + .probe = c3_mipi_adap_probe,
> > > + .remove = c3_mipi_adap_remove,
> > > + .driver = {
> > > + .name = "c3-mipi-adapter",
> > > + .of_match_table = c3_mipi_adap_of_match,
> > > + .pm = &c3_mipi_adap_pm_ops,
> > > + },
> > > +};
> > > +
> > > +module_platform_driver(c3_mipi_adap_driver);
> > > +
> > > +MODULE_AUTHOR("Keke Li <keke.li@...ogic.com>");
> > > +MODULE_DESCRIPTION("Amlogic C3 MIPI adapter");
> > > +MODULE_LICENSE("GPL");
> > >
> > > --
> > > 2.46.1
> > >
> > >
> > >
>
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