// SPDX-License-Identifier: GPL-2.0+
/*
 * i.MX Pixel Pipeline (PXP) mem-to-mem scaler/CSC/rotator driver
 *
 * Copyright (c) 2018 Pengutronix, Philipp Zabel
 *
 * based on vim2m
 *
 * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
 * Pawel Osciak, <pawel@osciak.com>
 * Marek Szyprowski, <m.szyprowski@samsung.com>
 */
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/sched.h>
#include <linux/slab.h>

#include <linux/platform_device.h>
#include <media/v4l2-mem2mem.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>
#include <media/videobuf2-dma-contig.h>

#include "imx-pxp.h"

static unsigned int debug;
module_param(debug, uint, 0644);
MODULE_PARM_DESC(debug, "activates debug info");

#define MIN_W 8
#define MIN_H 8
#define MAX_W 4096
#define MAX_H 4096
#define ALIGN_W 3 /* 8x8 pixel blocks */
#define ALIGN_H 3

/* Flags that indicate a format can be used for capture/output */
#define MEM2MEM_CAPTURE	(1 << 0)
#define MEM2MEM_OUTPUT	(1 << 1)

#define MEM2MEM_NAME		"pxp"

/* Flags that indicate processing mode */
#define MEM2MEM_HFLIP	(1 << 0)
#define MEM2MEM_VFLIP	(1 << 1)

#define dprintk(dev, fmt, arg...) \
	v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)

struct pxp_fmt {
	u32	fourcc;
	int	depth;
	/* Types the format can be used for */
	u32	types;
};

static struct pxp_fmt formats[] = {
	{
		.fourcc	= V4L2_PIX_FMT_XBGR32,
		.depth	= 32,
		/* Both capture and output format */
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc	= V4L2_PIX_FMT_ABGR32,
		.depth	= 32,
		/* Capture-only format */
		.types	= MEM2MEM_CAPTURE,
	}, {
		.fourcc	= V4L2_PIX_FMT_BGR24,
		.depth	= 24,
		.types	= MEM2MEM_CAPTURE,
	}, {
		.fourcc	= V4L2_PIX_FMT_RGB565,
		.depth	= 16,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc	= V4L2_PIX_FMT_RGB555,
		.depth	= 16,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_RGB444,
		.depth	= 16,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_VUYA32,
		.depth	= 32,
		.types	= MEM2MEM_CAPTURE,
	}, {
		.fourcc = V4L2_PIX_FMT_VUYX32,
		.depth	= 32,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_UYVY,
		.depth	= 16,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_YUYV,
		.depth	= 16,
		/* Output-only format */
		.types	= MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_VYUY,
		.depth	= 16,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_YVYU,
		.depth	= 16,
		.types	= MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_GREY,
		.depth	= 8,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_Y4,
		.depth	= 4,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_NV16,
		.depth	= 16,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_NV12,
		.depth	= 12,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_NV21,
		.depth	= 12,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_NV61,
		.depth	= 16,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_YUV422P,
		.depth	= 16,
		.types	= MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_YUV420,
		.depth	= 12,
		.types	= MEM2MEM_OUTPUT,
	},
};

#define NUM_FORMATS ARRAY_SIZE(formats)

/* Per-queue, driver-specific private data */
struct pxp_q_data {
	unsigned int		width;
	unsigned int		height;
	unsigned int		bytesperline;
	unsigned int		sizeimage;
	unsigned int		sequence;
	struct pxp_fmt		*fmt;
	enum v4l2_ycbcr_encoding ycbcr_enc;
	enum v4l2_quantization	quant;
};

enum {
	V4L2_M2M_SRC = 0,
	V4L2_M2M_DST = 1,
};

static struct pxp_fmt *find_format(struct v4l2_format *f)
{
	struct pxp_fmt *fmt;
	unsigned int k;

	for (k = 0; k < NUM_FORMATS; k++) {
		fmt = &formats[k];
		if (fmt->fourcc == f->fmt.pix.pixelformat)
			break;
	}

	if (k == NUM_FORMATS)
		return NULL;

	return &formats[k];
}

struct pxp_dev {
	struct v4l2_device	v4l2_dev;
	struct video_device	vfd;

	struct clk		*clk;
	void __iomem		*mmio;

	atomic_t		num_inst;
	struct mutex		dev_mutex;
	spinlock_t		irqlock;

	struct v4l2_m2m_dev	*m2m_dev;
};

struct pxp_ctx {
	struct v4l2_fh		fh;
	struct pxp_dev	*dev;

	struct v4l2_ctrl_handler hdl;

	/* Abort requested by m2m */
	int			aborting;

	/* Processing mode */
	int			mode;
	u8			alpha_component;

	enum v4l2_colorspace	colorspace;
	enum v4l2_xfer_func	xfer_func;

	/* Source and destination queue data */
	struct pxp_q_data   q_data[2];
};

static inline struct pxp_ctx *file2ctx(struct file *file)
{
	return container_of(file->private_data, struct pxp_ctx, fh);
}

static struct pxp_q_data *get_q_data(struct pxp_ctx *ctx,
					 enum v4l2_buf_type type)
{
	if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
		return &ctx->q_data[V4L2_M2M_SRC];
	else
		return &ctx->q_data[V4L2_M2M_DST];
}

static u32 pxp_v4l2_pix_fmt_to_ps_format(u32 v4l2_pix_fmt)
{
	switch (v4l2_pix_fmt) {
	case V4L2_PIX_FMT_XBGR32:  return BV_PXP_PS_CTRL_FORMAT__RGB888;
	case V4L2_PIX_FMT_RGB555:  return BV_PXP_PS_CTRL_FORMAT__RGB555;
	case V4L2_PIX_FMT_RGB444:  return BV_PXP_PS_CTRL_FORMAT__RGB444;
	case V4L2_PIX_FMT_RGB565:  return BV_PXP_PS_CTRL_FORMAT__RGB565;
	case V4L2_PIX_FMT_VUYX32:  return BV_PXP_PS_CTRL_FORMAT__YUV1P444;
	case V4L2_PIX_FMT_UYVY:    return BV_PXP_PS_CTRL_FORMAT__UYVY1P422;
	case V4L2_PIX_FMT_YUYV:    return BM_PXP_PS_CTRL_WB_SWAP |
					  BV_PXP_PS_CTRL_FORMAT__UYVY1P422;
	case V4L2_PIX_FMT_VYUY:    return BV_PXP_PS_CTRL_FORMAT__VYUY1P422;
	case V4L2_PIX_FMT_YVYU:    return BM_PXP_PS_CTRL_WB_SWAP |
					  BV_PXP_PS_CTRL_FORMAT__VYUY1P422;
	case V4L2_PIX_FMT_GREY:    return BV_PXP_PS_CTRL_FORMAT__Y8;
	default:
	case V4L2_PIX_FMT_Y4:      return BV_PXP_PS_CTRL_FORMAT__Y4;
	case V4L2_PIX_FMT_NV16:    return BV_PXP_PS_CTRL_FORMAT__YUV2P422;
	case V4L2_PIX_FMT_NV12:    return BV_PXP_PS_CTRL_FORMAT__YUV2P420;
	case V4L2_PIX_FMT_NV21:    return BV_PXP_PS_CTRL_FORMAT__YVU2P420;
	case V4L2_PIX_FMT_NV61:    return BV_PXP_PS_CTRL_FORMAT__YVU2P422;
	case V4L2_PIX_FMT_YUV422P: return BV_PXP_PS_CTRL_FORMAT__YUV422;
	case V4L2_PIX_FMT_YUV420:  return BV_PXP_PS_CTRL_FORMAT__YUV420;
	}
}

static u32 pxp_v4l2_pix_fmt_to_out_format(u32 v4l2_pix_fmt)
{
	switch (v4l2_pix_fmt) {
	case V4L2_PIX_FMT_XBGR32:   return BV_PXP_OUT_CTRL_FORMAT__RGB888;
	case V4L2_PIX_FMT_ABGR32:   return BV_PXP_OUT_CTRL_FORMAT__ARGB8888;
	case V4L2_PIX_FMT_BGR24:    return BV_PXP_OUT_CTRL_FORMAT__RGB888P;
	/* Missing V4L2 pixel formats for ARGB1555 and ARGB4444 */
	case V4L2_PIX_FMT_RGB555:   return BV_PXP_OUT_CTRL_FORMAT__RGB555;
	case V4L2_PIX_FMT_RGB444:   return BV_PXP_OUT_CTRL_FORMAT__RGB444;
	case V4L2_PIX_FMT_RGB565:   return BV_PXP_OUT_CTRL_FORMAT__RGB565;
	case V4L2_PIX_FMT_VUYA32:
	case V4L2_PIX_FMT_VUYX32:   return BV_PXP_OUT_CTRL_FORMAT__YUV1P444;
	case V4L2_PIX_FMT_UYVY:     return BV_PXP_OUT_CTRL_FORMAT__UYVY1P422;
	case V4L2_PIX_FMT_VYUY:     return BV_PXP_OUT_CTRL_FORMAT__VYUY1P422;
	case V4L2_PIX_FMT_GREY:     return BV_PXP_OUT_CTRL_FORMAT__Y8;
	default:
	case V4L2_PIX_FMT_Y4:       return BV_PXP_OUT_CTRL_FORMAT__Y4;
	case V4L2_PIX_FMT_NV16:     return BV_PXP_OUT_CTRL_FORMAT__YUV2P422;
	case V4L2_PIX_FMT_NV12:     return BV_PXP_OUT_CTRL_FORMAT__YUV2P420;
	case V4L2_PIX_FMT_NV61:     return BV_PXP_OUT_CTRL_FORMAT__YVU2P422;
	case V4L2_PIX_FMT_NV21:     return BV_PXP_OUT_CTRL_FORMAT__YVU2P420;
	}
}

static bool pxp_v4l2_pix_fmt_is_yuv(u32 v4l2_pix_fmt)
{
	switch (v4l2_pix_fmt) {
	case V4L2_PIX_FMT_VUYA32:
	case V4L2_PIX_FMT_VUYX32:
	case V4L2_PIX_FMT_UYVY:
	case V4L2_PIX_FMT_YUYV:
	case V4L2_PIX_FMT_VYUY:
	case V4L2_PIX_FMT_YVYU:
	case V4L2_PIX_FMT_NV16:
	case V4L2_PIX_FMT_NV12:
	case V4L2_PIX_FMT_NV61:
	case V4L2_PIX_FMT_NV21:
	case V4L2_PIX_FMT_YUV420:
	case V4L2_PIX_FMT_YUV422P:
	case V4L2_PIX_FMT_GREY:
	case V4L2_PIX_FMT_Y4:
		return true;
	default:
		return false;
	}
}

static void pxp_setup_csc(struct pxp_ctx *ctx)
{
	struct pxp_dev *dev = ctx->dev;
	enum v4l2_ycbcr_encoding ycbcr_enc;
	enum v4l2_quantization quantization;

	if (pxp_v4l2_pix_fmt_is_yuv(ctx->q_data[V4L2_M2M_SRC].fmt->fourcc) &&
	    !pxp_v4l2_pix_fmt_is_yuv(ctx->q_data[V4L2_M2M_DST].fmt->fourcc)) {
		/*
		 * CSC1 YUV/YCbCr to RGB conversion is implemented as follows:
		 *
		 * |R|   |C0 0  C1|   |Y  + Yoffset |
		 * |G| = |C0 C3 C2| * |Cb + UVoffset|
		 * |B|   |C0 C4 0 |   |Cr + UVoffset|
		 *
		 * Results are clamped to 0..255.
		 *
		 * BT.601 limited range:
		 *
		 * |R|   |1.1644  0.0000  1.5960|   |Y  - 16 |
		 * |G| = |1.1644 -0.3917 -0.8129| * |Cb - 128|
		 * |B|   |1.1644  2.0172  0.0000|   |Cr - 128|
		 */
		static const u32 csc1_coef_bt601_lim[3] = {
			BM_PXP_CSC1_COEF0_YCBCR_MODE |
			BF_PXP_CSC1_COEF0_C0(0x12a) |	/*  1.1641 (-0.03 %) */
			BF_PXP_CSC1_COEF0_UV_OFFSET(-128) |
			BF_PXP_CSC1_COEF0_Y_OFFSET(-16),
			BF_PXP_CSC1_COEF1_C1(0x198) |	/*  1.5938 (-0.23 %) */
			BF_PXP_CSC1_COEF1_C4(0x204),	/*  2.0156 (-0.16 %) */
			BF_PXP_CSC1_COEF2_C2(0x730) |	/* -0.8125 (+0.04 %) */
			BF_PXP_CSC1_COEF2_C3(0x79c),	/* -0.3906 (+0.11 %) */
		};
		/*
		 * BT.601 full range:
		 *
		 * |R|   |1.0000  0.0000  1.4020|   |Y  + 0  |
		 * |G| = |1.0000 -0.3441 -0.7141| * |Cb - 128|
		 * |B|   |1.0000  1.7720  0.0000|   |Cr - 128|
		 */
		static const u32 csc1_coef_bt601_full[3] = {
			BM_PXP_CSC1_COEF0_YCBCR_MODE |
			BF_PXP_CSC1_COEF0_C0(0x100) |	/*  1.0000 (+0.00 %) */
			BF_PXP_CSC1_COEF0_UV_OFFSET(-128) |
			BF_PXP_CSC1_COEF0_Y_OFFSET(0),
			BF_PXP_CSC1_COEF1_C1(0x166) |	/*  1.3984 (-0.36 %) */
			BF_PXP_CSC1_COEF1_C4(0x1c5),	/*  1.7695 (-0.25 %) */
			BF_PXP_CSC1_COEF2_C2(0x74a) |	/* -0.7109 (+0.32 %) */
			BF_PXP_CSC1_COEF2_C3(0x7a8),	/* -0.3438 (+0.04 %) */
		};
		/*
		 * Rec.709 limited range:
		 *
		 * |R|   |1.1644  0.0000  1.7927|   |Y  - 16 |
		 * |G| = |1.1644 -0.2132 -0.5329| * |Cb - 128|
		 * |B|   |1.1644  2.1124  0.0000|   |Cr - 128|
		 */
		static const u32 csc1_coef_rec709_lim[3] = {
			BM_PXP_CSC1_COEF0_YCBCR_MODE |
			BF_PXP_CSC1_COEF0_C0(0x12a) |	/*  1.1641 (-0.03 %) */
			BF_PXP_CSC1_COEF0_UV_OFFSET(-128) |
			BF_PXP_CSC1_COEF0_Y_OFFSET(-16),
			BF_PXP_CSC1_COEF1_C1(0x1ca) |	/*  1.7891 (-0.37 %) */
			BF_PXP_CSC1_COEF1_C4(0x21c),	/*  2.1094 (-0.30 %) */
			BF_PXP_CSC1_COEF2_C2(0x778) |	/* -0.5312 (+0.16 %) */
			BF_PXP_CSC1_COEF2_C3(0x7ca),	/* -0.2109 (+0.23 %) */
		};
		/*
		 * Rec.709 full range:
		 *
		 * |R|   |1.0000  0.0000  1.5748|   |Y  + 0  |
		 * |G| = |1.0000 -0.1873 -0.4681| * |Cb - 128|
		 * |B|   |1.0000  1.8556  0.0000|   |Cr - 128|
		 */
		static const u32 csc1_coef_rec709_full[3] = {
			BM_PXP_CSC1_COEF0_YCBCR_MODE |
			BF_PXP_CSC1_COEF0_C0(0x100) |	/*  1.0000 (+0.00 %) */
			BF_PXP_CSC1_COEF0_UV_OFFSET(-128) |
			BF_PXP_CSC1_COEF0_Y_OFFSET(0),
			BF_PXP_CSC1_COEF1_C1(0x193) |	/*  1.5742 (-0.06 %) */
			BF_PXP_CSC1_COEF1_C4(0x1db),	/*  1.8555 (-0.01 %) */
			BF_PXP_CSC1_COEF2_C2(0x789) |	/* -0.4648 (+0.33 %) */
			BF_PXP_CSC1_COEF2_C3(0x7d1),	/* -0.1836 (+0.37 %) */
		};
		/*
		 * BT.2020 limited range:
		 *
		 * |R|   |1.1644  0.0000  1.6787|   |Y  - 16 |
		 * |G| = |1.1644 -0.1874 -0.6505| * |Cb - 128|
		 * |B|   |1.1644  2.1418  0.0000|   |Cr - 128|
		 */
		static const u32 csc1_coef_bt2020_lim[3] = {
			BM_PXP_CSC1_COEF0_YCBCR_MODE |
			BF_PXP_CSC1_COEF0_C0(0x12a) |	/*  1.1641 (-0.03 %) */
			BF_PXP_CSC1_COEF0_UV_OFFSET(-128) |
			BF_PXP_CSC1_COEF0_Y_OFFSET(-16),
			BF_PXP_CSC1_COEF1_C1(0x1ad) |	/*  1.6758 (-0.29 %) */
			BF_PXP_CSC1_COEF1_C4(0x224),	/*  2.1406 (-0.11 %) */
			BF_PXP_CSC1_COEF2_C2(0x75a) |	/* -0.6484 (+0.20 %) */
			BF_PXP_CSC1_COEF2_C3(0x7d1),	/* -0.1836 (+0.38 %) */
		};
		/*
		 * BT.2020 full range:
		 *
		 * |R|   |1.0000  0.0000  1.4746|   |Y  + 0  |
		 * |G| = |1.0000 -0.1646 -0.5714| * |Cb - 128|
		 * |B|   |1.0000  1.8814  0.0000|   |Cr - 128|
		 */
		static const u32 csc1_coef_bt2020_full[3] = {
			BM_PXP_CSC1_COEF0_YCBCR_MODE |
			BF_PXP_CSC1_COEF0_C0(0x100) |	/*  1.0000 (+0.00 %) */
			BF_PXP_CSC1_COEF0_UV_OFFSET(-128) |
			BF_PXP_CSC1_COEF0_Y_OFFSET(0),
			BF_PXP_CSC1_COEF1_C1(0x179) |	/*  1.4727 (-0.19 %) */
			BF_PXP_CSC1_COEF1_C4(0x1e1),	/*  1.8789 (-0.25 %) */
			BF_PXP_CSC1_COEF2_C2(0x76e) |	/* -0.5703 (+0.11 %) */
			BF_PXP_CSC1_COEF2_C3(0x7d6),	/* -0.1641 (+0.05 %) */
		};
		/*
		 * SMPTE 240m limited range:
		 *
		 * |R|   |1.1644  0.0000  1.7937|   |Y  - 16 |
		 * |G| = |1.1644 -0.2565 -0.5427| * |Cb - 128|
		 * |B|   |1.1644  2.0798  0.0000|   |Cr - 128|
		 */
		static const u32 csc1_coef_smpte240m_lim[3] = {
			BM_PXP_CSC1_COEF0_YCBCR_MODE |
			BF_PXP_CSC1_COEF0_C0(0x12a) |	/*  1.1641 (-0.03 %) */
			BF_PXP_CSC1_COEF0_UV_OFFSET(-128) |
			BF_PXP_CSC1_COEF0_Y_OFFSET(-16),
			BF_PXP_CSC1_COEF1_C1(0x1cb) |	/*  1.7930 (-0.07 %) */
			BF_PXP_CSC1_COEF1_C4(0x214),	/*  2.0781 (-0.17 %) */
			BF_PXP_CSC1_COEF2_C2(0x776) |	/* -0.5391 (+0.36 %) */
			BF_PXP_CSC1_COEF2_C3(0x7bf),	/* -0.2539 (+0.26 %) */
		};
		/*
		 * SMPTE 240m full range:
		 *
		 * |R|   |1.0000  0.0000  1.5756|   |Y  + 0  |
		 * |G| = |1.0000 -0.2253 -0.4767| * |Cb - 128|
		 * |B|   |1.0000  1.8270  0.0000|   |Cr - 128|
		 */
		static const u32 csc1_coef_smpte240m_full[3] = {
			BM_PXP_CSC1_COEF0_YCBCR_MODE |
			BF_PXP_CSC1_COEF0_C0(0x100) |	/*  1.0000 (+0.00 %) */
			BF_PXP_CSC1_COEF0_UV_OFFSET(-128) |
			BF_PXP_CSC1_COEF0_Y_OFFSET(0),
			BF_PXP_CSC1_COEF1_C1(0x193) |	/*  1.5742 (-0.14 %) */
			BF_PXP_CSC1_COEF1_C4(0x1d3),	/*  1.8242 (-0.28 %) */
			BF_PXP_CSC1_COEF2_C2(0x786) |	/* -0.4766 (+0.01 %) */
			BF_PXP_CSC1_COEF2_C3(0x7c7),	/* -0.2227 (+0.26 %) */
		};
		const u32 *csc1_coef;

		ycbcr_enc = ctx->q_data[V4L2_M2M_SRC].ycbcr_enc;
		quantization = ctx->q_data[V4L2_M2M_SRC].quant;

		if (ycbcr_enc == V4L2_YCBCR_ENC_601) {
			if (quantization == V4L2_QUANTIZATION_FULL_RANGE)
				csc1_coef = csc1_coef_bt601_full;
			else
				csc1_coef = csc1_coef_bt601_lim;
		} else if (ycbcr_enc == V4L2_YCBCR_ENC_709) {
			if (quantization == V4L2_QUANTIZATION_FULL_RANGE)
				csc1_coef = csc1_coef_rec709_full;
			else
				csc1_coef = csc1_coef_rec709_lim;
		} else if (ycbcr_enc == V4L2_YCBCR_ENC_BT2020) {
			if (quantization == V4L2_QUANTIZATION_FULL_RANGE)
				csc1_coef = csc1_coef_bt2020_full;
			else
				csc1_coef = csc1_coef_bt2020_lim;
		} else {
			if (quantization == V4L2_QUANTIZATION_FULL_RANGE)
				csc1_coef = csc1_coef_smpte240m_full;
			else
				csc1_coef = csc1_coef_smpte240m_lim;
		}

		writel(csc1_coef[0], dev->mmio + HW_PXP_CSC1_COEF0);
		writel(csc1_coef[1], dev->mmio + HW_PXP_CSC1_COEF1);
		writel(csc1_coef[2], dev->mmio + HW_PXP_CSC1_COEF2);
	} else {
		writel(BM_PXP_CSC1_COEF0_BYPASS, dev->mmio + HW_PXP_CSC1_COEF0);
	}

	if (!pxp_v4l2_pix_fmt_is_yuv(ctx->q_data[V4L2_M2M_SRC].fmt->fourcc) &&
	    pxp_v4l2_pix_fmt_is_yuv(ctx->q_data[V4L2_M2M_DST].fmt->fourcc)) {
		/*
		 * CSC2 RGB to YUV/YCbCr conversion is implemented as follows:
		 *
		 * |Y |   |A1 A2 A3|   |R|   |D1|
		 * |Cb| = |B1 B2 B3| * |G| + |D2|
		 * |Cr|   |C1 C2 C3|   |B|   |D3|
		 *
		 * Results are clamped to 0..255.
		 *
		 * BT.601 limited range:
		 *
		 * |Y |   | 0.2568  0.5041  0.0979|   |R|   |16 |
		 * |Cb| = |-0.1482 -0.2910  0.4392| * |G| + |128|
		 * |Cr|   | 0.4392  0.4392 -0.3678|   |B|   |128|
		 */
		static const u32 csc2_coef_bt601_lim[6] = {
			BF_PXP_CSC2_COEF0_A2(0x081) |	/*  0.5039 (-0.02 %) */
			BF_PXP_CSC2_COEF0_A1(0x041),	/*  0.2539 (-0.29 %) */
			BF_PXP_CSC2_COEF1_B1(0x7db) |	/* -0.1445 (+0.37 %) */
			BF_PXP_CSC2_COEF1_A3(0x019),	/*  0.0977 (-0.02 %) */
			BF_PXP_CSC2_COEF2_B3(0x070) |	/*  0.4375 (-0.17 %) */
			BF_PXP_CSC2_COEF2_B2(0x7b6),	/* -0.2891 (+0.20 %) */
			BF_PXP_CSC2_COEF3_C2(0x7a2) |	/* -0.3672 (+0.06 %) */
			BF_PXP_CSC2_COEF3_C1(0x070),	/*  0.4375 (-0.17 %) */
			BF_PXP_CSC2_COEF4_D1(16) |
			BF_PXP_CSC2_COEF4_C3(0x7ee),	/* -0.0703 (+0.11 %) */
			BF_PXP_CSC2_COEF5_D3(128) |
			BF_PXP_CSC2_COEF5_D2(128),
		};
		/*
		 * BT.601 full range:
		 *
		 * |Y |   | 0.2990  0.5870  0.1140|   |R|   |0  |
		 * |Cb| = |-0.1687 -0.3313  0.5000| * |G| + |128|
		 * |Cr|   | 0.5000  0.5000 -0.4187|   |B|   |128|
		 */
		static const u32 csc2_coef_bt601_full[6] = {
			BF_PXP_CSC2_COEF0_A2(0x096) |	/*  0.5859 (-0.11 %) */
			BF_PXP_CSC2_COEF0_A1(0x04c),	/*  0.2969 (-0.21 %) */
			BF_PXP_CSC2_COEF1_B1(0x7d5) |	/* -0.1680 (+0.07 %) */
			BF_PXP_CSC2_COEF1_A3(0x01d),	/*  0.1133 (-0.07 %) */
			BF_PXP_CSC2_COEF2_B3(0x080) |	/*  0.5000 (+0.00 %) */
			BF_PXP_CSC2_COEF2_B2(0x7ac),	/* -0.3281 (+0.32 %) */
			BF_PXP_CSC2_COEF3_C2(0x795) |	/* -0.4180 (+0.07 %) */
			BF_PXP_CSC2_COEF3_C1(0x080),	/*  0.5000 (+0.00 %) */
			BF_PXP_CSC2_COEF4_D1(0) |
			BF_PXP_CSC2_COEF4_C3(0x7ec),	/* -0.0781 (+0.32 %) */
			BF_PXP_CSC2_COEF5_D3(128) |
			BF_PXP_CSC2_COEF5_D2(128),
		};
		/*
		 * Rec.709 limited range:
		 *
		 * |Y |   | 0.1826  0.6142  0.0620|   |R|   |16 |
		 * |Cb| = |-0.1007 -0.3385  0.4392| * |G| + |128|
		 * |Cr|   | 0.4392  0.4392 -0.3990|   |B|   |128|
		 */
		static const u32 csc2_coef_rec709_lim[6] = {
			BF_PXP_CSC2_COEF0_A2(0x09d) |	/*  0.6133 (-0.09 %) */
			BF_PXP_CSC2_COEF0_A1(0x02e),	/*  0.1797 (-0.29 %) */
			BF_PXP_CSC2_COEF1_B1(0x7e7) |	/* -0.0977 (+0.30 %) */
			BF_PXP_CSC2_COEF1_A3(0x00f),	/*  0.0586 (-0.34 %) */
			BF_PXP_CSC2_COEF2_B3(0x070) |	/*  0.4375 (-0.17 %) */
			BF_PXP_CSC2_COEF2_B2(0x7aa),	/* -0.3359 (+0.26 %) */
			BF_PXP_CSC2_COEF3_C2(0x79a) |	/* -0.3984 (+0.05 %) */
			BF_PXP_CSC2_COEF3_C1(0x070),	/*  0.4375 (-0.17 %) */
			BF_PXP_CSC2_COEF4_D1(16) |
			BF_PXP_CSC2_COEF4_C3(0x7f6),	/* -0.0391 (+0.12 %) */
			BF_PXP_CSC2_COEF5_D3(128) |
			BF_PXP_CSC2_COEF5_D2(128),
		};
		/*
		 * Rec.709 full range:
		 *
		 * |Y |   | 0.2126  0.7152  0.0722|   |R|   |0  |
		 * |Cb| = |-0.1146 -0.3854  0.5000| * |G| + |128|
		 * |Cr|   | 0.5000  0.5000 -0.4542|   |B|   |128|
		 */
		static const u32 csc2_coef_rec709_full[6] = {
			BF_PXP_CSC2_COEF0_A2(0x0b7) |	/*  0.7148 (-0.04 %) */
			BF_PXP_CSC2_COEF0_A1(0x036),	/*  0.2109 (-0.17 %) */
			BF_PXP_CSC2_COEF1_B1(0x7e3) |	/* -0.1133 (+0.13 %) */
			BF_PXP_CSC2_COEF1_A3(0x012),	/*  0.0703 (-0.19 %) */
			BF_PXP_CSC2_COEF2_B3(0x080) |	/*  0.5000 (+0.00 %) */
			BF_PXP_CSC2_COEF2_B2(0x79e),	/* -0.3828 (+0.26 %) */
			BF_PXP_CSC2_COEF3_C2(0x78c) |	/* -0.4531 (+0.11 %) */
			BF_PXP_CSC2_COEF3_C1(0x080),	/*  0.5000 (+0.00 %) */
			BF_PXP_CSC2_COEF4_D1(0) |
			BF_PXP_CSC2_COEF4_C3(0x7f5),	/* -0.0430 (+0.28 %) */
			BF_PXP_CSC2_COEF5_D3(128) |
			BF_PXP_CSC2_COEF5_D2(128),
		};
		/*
		 * BT.2020 limited range:
		 *
		 * |Y |   | 0.2256  0.5823  0.0509|   |R|   |16 |
		 * |Cb| = |-0.1226 -0.3166  0.4392| * |G| + |128|
		 * |Cr|   | 0.4392  0.4392 -0.4039|   |B|   |128|
		 */
		static const u32 csc2_coef_bt2020_lim[6] = {
			BF_PXP_CSC2_COEF0_A2(0x095) |	/*  0.5820 (-0.03 %) */
			BF_PXP_CSC2_COEF0_A1(0x039),	/*  0.2227 (-0.30 %) */
			BF_PXP_CSC2_COEF1_B1(0x7e1) |	/* -0.1211 (+0.15 %) */
			BF_PXP_CSC2_COEF1_A3(0x00d),	/*  0.0508 (-0.01 %) */
			BF_PXP_CSC2_COEF2_B3(0x070) |	/*  0.4375 (-0.17 %) */
			BF_PXP_CSC2_COEF2_B2(0x7af),	/* -0.3164 (+0.02 %) */
			BF_PXP_CSC2_COEF3_C2(0x799) |	/* -0.4023 (+0.16 %) */
			BF_PXP_CSC2_COEF3_C1(0x070),	/*  0.4375 (-0.17 %) */
			BF_PXP_CSC2_COEF4_D1(16) |
			BF_PXP_CSC2_COEF4_C3(0x7f7),	/* -0.0352 (+0.02 %) */
			BF_PXP_CSC2_COEF5_D3(128) |
			BF_PXP_CSC2_COEF5_D2(128),
		};
		/*
		 * BT.2020 full range:
		 *
		 * |Y |   | 0.2627  0.6780  0.0593|   |R|   |0  |
		 * |Cb| = |-0.1396 -0.3604  0.5000| * |G| + |128|
		 * |Cr|   | 0.5000  0.5000 -0.4598|   |B|   |128|
		 */
		static const u32 csc2_coef_bt2020_full[6] = {
			BF_PXP_CSC2_COEF0_A2(0x0ad) |	/*  0.6758 (-0.22 %) */
			BF_PXP_CSC2_COEF0_A1(0x043),	/*  0.2617 (-0.10 %) */
			BF_PXP_CSC2_COEF1_B1(0x7dd) |	/* -0.1367 (+0.29 %) */
			BF_PXP_CSC2_COEF1_A3(0x00f),	/*  0.0586 (-0.07 %) */
			BF_PXP_CSC2_COEF2_B3(0x080) |	/*  0.5000 (+0.00 %) */
			BF_PXP_CSC2_COEF2_B2(0x7a4),	/* -0.3594 (+0.10 %) */
			BF_PXP_CSC2_COEF3_C2(0x78b) |	/* -0.4570 (+0.28 %) */
			BF_PXP_CSC2_COEF3_C1(0x080),	/*  0.5000 (+0.00 %) */
			BF_PXP_CSC2_COEF4_D1(0) |
			BF_PXP_CSC2_COEF4_C3(0x7f6),	/* -0.0391 (+0.11 %) */
			BF_PXP_CSC2_COEF5_D3(128) |
			BF_PXP_CSC2_COEF5_D2(128),
		};
		/*
		 * SMPTE 240m limited range:
		 *
		 * |Y |   | 0.1821  0.6020  0.0747|   |R|   |16 |
		 * |Cb| = |-0.1019 -0.3373  0.4392| * |G| + |128|
		 * |Cr|   | 0.4392  0.4392 -0.3909|   |B|   |128|
		 */
		static const u32 csc2_coef_smpte240m_lim[6] = {
			BF_PXP_CSC2_COEF0_A2(0x09a) |	/*  0.6016 (-0.05 %) */
			BF_PXP_CSC2_COEF0_A1(0x02e),	/*  0.1797 (-0.24 %) */
			BF_PXP_CSC2_COEF1_B1(0x7e6) |	/* -0.1016 (+0.03 %) */
			BF_PXP_CSC2_COEF1_A3(0x013),	/*  0.0742 (-0.05 %) */
			BF_PXP_CSC2_COEF2_B3(0x070) |	/*  0.4375 (-0.17 %) */
			BF_PXP_CSC2_COEF2_B2(0x7aa),	/* -0.3359 (+0.14 %) */
			BF_PXP_CSC2_COEF3_C2(0x79c) |	/* -0.3906 (+0.03 %) */
			BF_PXP_CSC2_COEF3_C1(0x070),	/*  0.4375 (-0.17 %) */
			BF_PXP_CSC2_COEF4_D1(16) |
			BF_PXP_CSC2_COEF4_C3(0x7f4),	/* -0.0469 (+0.14 %) */
			BF_PXP_CSC2_COEF5_D3(128) |
			BF_PXP_CSC2_COEF5_D2(128),
		};
		/*
		 * SMPTE 240m full range:
		 *
		 * |Y |   | 0.2120  0.7010  0.0870|   |R|   |0  |
		 * |Cb| = |-0.1160 -0.3840  0.5000| * |G| + |128|
		 * |Cr|   | 0.5000  0.5000 -0.4450|   |B|   |128|
		 */
		static const u32 csc2_coef_smpte240m_full[6] = {
			BF_PXP_CSC2_COEF0_A2(0x0b3) |	/*  0.6992 (-0.18 %) */
			BF_PXP_CSC2_COEF0_A1(0x036),	/*  0.2109 (-0.11 %) */
			BF_PXP_CSC2_COEF1_B1(0x7e3) |	/* -0.1133 (+0.27 %) */
			BF_PXP_CSC2_COEF1_A3(0x016),	/*  0.0859 (-0.11 %) */
			BF_PXP_CSC2_COEF2_B3(0x080) |	/*  0.5000 (+0.00 %) */
			BF_PXP_CSC2_COEF2_B2(0x79e),	/* -0.3828 (+0.12 %) */
			BF_PXP_CSC2_COEF3_C2(0x78f) |	/* -0.4414 (+0.36 %) */
			BF_PXP_CSC2_COEF3_C1(0x080),	/*  0.5000 (+0.00 %) */
			BF_PXP_CSC2_COEF4_D1(0) |
			BF_PXP_CSC2_COEF4_C3(0x7f2),	/* -0.0547 (+0.03 %) */
			BF_PXP_CSC2_COEF5_D3(128) |
			BF_PXP_CSC2_COEF5_D2(128),
		};
		const u32 *csc2_coef;
		u32 csc2_ctrl;

		ycbcr_enc = ctx->q_data[V4L2_M2M_DST].ycbcr_enc;
		quantization = ctx->q_data[V4L2_M2M_DST].quant;

		if (ycbcr_enc == V4L2_YCBCR_ENC_601) {
			if (quantization == V4L2_QUANTIZATION_FULL_RANGE)
				csc2_coef = csc2_coef_bt601_full;
			else
				csc2_coef = csc2_coef_bt601_lim;
		} else if (ycbcr_enc == V4L2_YCBCR_ENC_709) {
			if (quantization == V4L2_QUANTIZATION_FULL_RANGE)
				csc2_coef = csc2_coef_rec709_full;
			else
				csc2_coef = csc2_coef_rec709_lim;
		} else if (ycbcr_enc == V4L2_YCBCR_ENC_BT2020) {
			if (quantization == V4L2_QUANTIZATION_FULL_RANGE)
				csc2_coef = csc2_coef_bt2020_full;
			else
				csc2_coef = csc2_coef_bt2020_lim;
		} else {
			if (quantization == V4L2_QUANTIZATION_FULL_RANGE)
				csc2_coef = csc2_coef_smpte240m_full;
			else
				csc2_coef = csc2_coef_smpte240m_lim;
		}
		if (quantization == V4L2_QUANTIZATION_FULL_RANGE) {
			csc2_ctrl = BV_PXP_CSC2_CTRL_CSC_MODE__RGB2YUV <<
				    BP_PXP_CSC2_CTRL_CSC_MODE;
		} else {
			csc2_ctrl = BV_PXP_CSC2_CTRL_CSC_MODE__RGB2YCbCr <<
				    BP_PXP_CSC2_CTRL_CSC_MODE;
		}

		writel(csc2_ctrl, dev->mmio + HW_PXP_CSC2_CTRL);
		writel(csc2_coef[0], dev->mmio + HW_PXP_CSC2_COEF0);
		writel(csc2_coef[1], dev->mmio + HW_PXP_CSC2_COEF1);
		writel(csc2_coef[2], dev->mmio + HW_PXP_CSC2_COEF2);
		writel(csc2_coef[3], dev->mmio + HW_PXP_CSC2_COEF3);
		writel(csc2_coef[4], dev->mmio + HW_PXP_CSC2_COEF4);
		writel(csc2_coef[5], dev->mmio + HW_PXP_CSC2_COEF5);
	} else {
		writel(BM_PXP_CSC2_CTRL_BYPASS, dev->mmio + HW_PXP_CSC2_CTRL);
	}
}

static int pxp_start(struct pxp_ctx *ctx, struct vb2_v4l2_buffer *in_vb,
		     struct vb2_v4l2_buffer *out_vb)
{
	struct pxp_dev *dev = ctx->dev;
	struct pxp_q_data *q_data;
	u32 src_width, src_height, src_stride, src_fourcc;
	u32 dst_width, dst_height, dst_stride, dst_fourcc;
	dma_addr_t p_in, p_out;
	u32 ctrl, out_ctrl, out_buf, out_buf2, out_pitch, out_lrc, out_ps_ulc;
	u32 out_ps_lrc;
	u32 ps_ctrl, ps_buf, ps_ubuf, ps_vbuf, ps_pitch, ps_scale, ps_offset;
	u32 as_ulc, as_lrc;
	u32 y_size;
	u32 decx, decy, xscale, yscale;

	q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);

	src_width = ctx->q_data[V4L2_M2M_SRC].width;
	dst_width = ctx->q_data[V4L2_M2M_DST].width;
	src_height = ctx->q_data[V4L2_M2M_SRC].height;
	dst_height = ctx->q_data[V4L2_M2M_DST].height;
	src_stride = ctx->q_data[V4L2_M2M_SRC].bytesperline;
	dst_stride = ctx->q_data[V4L2_M2M_DST].bytesperline;
	src_fourcc = ctx->q_data[V4L2_M2M_SRC].fmt->fourcc;
	dst_fourcc = ctx->q_data[V4L2_M2M_DST].fmt->fourcc;

	p_in = vb2_dma_contig_plane_dma_addr(&in_vb->vb2_buf, 0);
	p_out = vb2_dma_contig_plane_dma_addr(&out_vb->vb2_buf, 0);

	if (!p_in || !p_out) {
		v4l2_err(&dev->v4l2_dev,
			 "Acquiring DMA addresses of buffers failed\n");
		return -EFAULT;
	}

	out_vb->sequence =
		get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE)->sequence++;
	in_vb->sequence = q_data->sequence++;
	out_vb->vb2_buf.timestamp = in_vb->vb2_buf.timestamp;

	if (in_vb->flags & V4L2_BUF_FLAG_TIMECODE)
		out_vb->timecode = in_vb->timecode;
	out_vb->field = in_vb->field;
	out_vb->flags = in_vb->flags &
		(V4L2_BUF_FLAG_TIMECODE |
		 V4L2_BUF_FLAG_KEYFRAME |
		 V4L2_BUF_FLAG_PFRAME |
		 V4L2_BUF_FLAG_BFRAME |
		 V4L2_BUF_FLAG_TSTAMP_SRC_MASK);

	/* Rotation disabled, 8x8 block size */
	ctrl = BF_PXP_CTRL_VFLIP0(!!(ctx->mode & MEM2MEM_VFLIP)) |
	       BF_PXP_CTRL_HFLIP0(!!(ctx->mode & MEM2MEM_HFLIP));
	/* Always write alpha value as V4L2_CID_ALPHA_COMPONENT */
	out_ctrl = BF_PXP_OUT_CTRL_ALPHA(ctx->alpha_component) |
		   BF_PXP_OUT_CTRL_ALPHA_OUTPUT(1) |
		   pxp_v4l2_pix_fmt_to_out_format(dst_fourcc);
	out_buf = p_out;
	switch (dst_fourcc) {
	case V4L2_PIX_FMT_NV12:
	case V4L2_PIX_FMT_NV21:
	case V4L2_PIX_FMT_NV16:
	case V4L2_PIX_FMT_NV61:
		out_buf2 = out_buf + dst_stride * dst_height;
		break;
	default:
		out_buf2 = 0;
	}

	out_pitch = BF_PXP_OUT_PITCH_PITCH(dst_stride);
	out_lrc = BF_PXP_OUT_LRC_X(dst_width - 1) |
		  BF_PXP_OUT_LRC_Y(dst_height - 1);
	/* PS covers whole output */
	out_ps_ulc = BF_PXP_OUT_PS_ULC_X(0) | BF_PXP_OUT_PS_ULC_Y(0);
	out_ps_lrc = BF_PXP_OUT_PS_LRC_X(dst_width - 1) |
		     BF_PXP_OUT_PS_LRC_Y(dst_height - 1);
	/* no AS */
	as_ulc = BF_PXP_OUT_AS_ULC_X(1) | BF_PXP_OUT_AS_ULC_Y(1);
	as_lrc = BF_PXP_OUT_AS_LRC_X(0) | BF_PXP_OUT_AS_LRC_Y(0);

	decx = (src_width <= dst_width) ? 0 : ilog2(src_width / dst_width);
	decy = (src_height <= dst_height) ? 0 : ilog2(src_height / dst_height);
	ps_ctrl = BF_PXP_PS_CTRL_DECX(decx) | BF_PXP_PS_CTRL_DECY(decy) |
		  pxp_v4l2_pix_fmt_to_ps_format(src_fourcc);
	ps_buf = p_in;
	y_size = src_stride * src_height;
	switch (src_fourcc) {
	case V4L2_PIX_FMT_YUV420:
		ps_ubuf = ps_buf + y_size;
		ps_vbuf = ps_ubuf + y_size / 4;
		break;
	case V4L2_PIX_FMT_YUV422P:
		ps_ubuf = ps_buf + y_size;
		ps_vbuf = ps_ubuf + y_size / 2;
		break;
	case V4L2_PIX_FMT_NV12:
	case V4L2_PIX_FMT_NV21:
	case V4L2_PIX_FMT_NV16:
	case V4L2_PIX_FMT_NV61:
		ps_ubuf = ps_buf + y_size;
		ps_vbuf = 0;
		break;
	case V4L2_PIX_FMT_GREY:
	case V4L2_PIX_FMT_Y4:
		ps_ubuf = 0;
		/* In grayscale mode, ps_vbuf contents are reused as CbCr */
		ps_vbuf = 0x8080;
		break;
	default:
		ps_ubuf = 0;
		ps_vbuf = 0;
		break;
	}
	ps_pitch = BF_PXP_PS_PITCH_PITCH(src_stride);
	if (decx) {
		xscale = (src_width >> decx) * 0x1000 / dst_width;
	} else {
		switch (src_fourcc) {
		case V4L2_PIX_FMT_UYVY:
		case V4L2_PIX_FMT_YUYV:
		case V4L2_PIX_FMT_VYUY:
		case V4L2_PIX_FMT_YVYU:
		case V4L2_PIX_FMT_NV16:
		case V4L2_PIX_FMT_NV12:
		case V4L2_PIX_FMT_NV21:
		case V4L2_PIX_FMT_NV61:
		case V4L2_PIX_FMT_YUV422P:
		case V4L2_PIX_FMT_YUV420:
			/*
			 * This avoids sampling past the right edge for
			 * horizontally chroma subsampled formats.
			 */
			xscale = (src_width - 2) * 0x1000 / (dst_width - 1);
			break;
		default:
			xscale = (src_width - 1) * 0x1000 / (dst_width - 1);
			break;
		}
	}
	if (decy)
		yscale = (src_height >> decy) * 0x1000 / dst_height;
	else
		yscale = (src_height - 1) * 0x1000 / (dst_height - 1);
	ps_scale = BF_PXP_PS_SCALE_YSCALE(yscale) |
		   BF_PXP_PS_SCALE_XSCALE(xscale);
	ps_offset = BF_PXP_PS_OFFSET_YOFFSET(0) | BF_PXP_PS_OFFSET_XOFFSET(0);

	writel(ctrl, dev->mmio + HW_PXP_CTRL);
	/* skip STAT */
	writel(out_ctrl, dev->mmio + HW_PXP_OUT_CTRL);
	writel(out_buf, dev->mmio + HW_PXP_OUT_BUF);
	writel(out_buf2, dev->mmio + HW_PXP_OUT_BUF2);
	writel(out_pitch, dev->mmio + HW_PXP_OUT_PITCH);
	writel(out_lrc, dev->mmio + HW_PXP_OUT_LRC);
	writel(out_ps_ulc, dev->mmio + HW_PXP_OUT_PS_ULC);
	writel(out_ps_lrc, dev->mmio + HW_PXP_OUT_PS_LRC);
	writel(as_ulc, dev->mmio + HW_PXP_OUT_AS_ULC);
	writel(as_lrc, dev->mmio + HW_PXP_OUT_AS_LRC);
	writel(ps_ctrl, dev->mmio + HW_PXP_PS_CTRL);
	writel(ps_buf, dev->mmio + HW_PXP_PS_BUF);
	writel(ps_ubuf, dev->mmio + HW_PXP_PS_UBUF);
	writel(ps_vbuf, dev->mmio + HW_PXP_PS_VBUF);
	writel(ps_pitch, dev->mmio + HW_PXP_PS_PITCH);
	writel(0x00ffffff, dev->mmio + HW_PXP_PS_BACKGROUND_0);
	writel(ps_scale, dev->mmio + HW_PXP_PS_SCALE);
	writel(ps_offset, dev->mmio + HW_PXP_PS_OFFSET);
	/* disable processed surface color keying */
	writel(0x00ffffff, dev->mmio + HW_PXP_PS_CLRKEYLOW_0);
	writel(0x00000000, dev->mmio + HW_PXP_PS_CLRKEYHIGH_0);

	/* disable alpha surface color keying */
	writel(0x00ffffff, dev->mmio + HW_PXP_AS_CLRKEYLOW_0);
	writel(0x00000000, dev->mmio + HW_PXP_AS_CLRKEYHIGH_0);

	/* setup CSC */
	pxp_setup_csc(ctx);

	/* bypass LUT */
	writel(BM_PXP_LUT_CTRL_BYPASS, dev->mmio + HW_PXP_LUT_CTRL);

	writel(BF_PXP_DATA_PATH_CTRL0_MUX15_SEL(0)|
	       BF_PXP_DATA_PATH_CTRL0_MUX14_SEL(1)|
	       BF_PXP_DATA_PATH_CTRL0_MUX13_SEL(0)|
	       BF_PXP_DATA_PATH_CTRL0_MUX12_SEL(0)|
	       BF_PXP_DATA_PATH_CTRL0_MUX11_SEL(0)|
	       BF_PXP_DATA_PATH_CTRL0_MUX10_SEL(0)|
	       BF_PXP_DATA_PATH_CTRL0_MUX9_SEL(1)|
	       BF_PXP_DATA_PATH_CTRL0_MUX8_SEL(0)|
	       BF_PXP_DATA_PATH_CTRL0_MUX7_SEL(0)|
	       BF_PXP_DATA_PATH_CTRL0_MUX6_SEL(0)|
	       BF_PXP_DATA_PATH_CTRL0_MUX5_SEL(0)|
	       BF_PXP_DATA_PATH_CTRL0_MUX4_SEL(0)|
	       BF_PXP_DATA_PATH_CTRL0_MUX3_SEL(0)|
	       BF_PXP_DATA_PATH_CTRL0_MUX2_SEL(0)|
	       BF_PXP_DATA_PATH_CTRL0_MUX1_SEL(0)|
	       BF_PXP_DATA_PATH_CTRL0_MUX0_SEL(0),
	       dev->mmio + HW_PXP_DATA_PATH_CTRL0);
	writel(BF_PXP_DATA_PATH_CTRL1_MUX17_SEL(1) |
	       BF_PXP_DATA_PATH_CTRL1_MUX16_SEL(1),
	       dev->mmio + HW_PXP_DATA_PATH_CTRL1);

	writel(0xffff, dev->mmio + HW_PXP_IRQ_MASK);

	/* ungate, enable PS/AS/OUT and PXP operation */
	writel(BM_PXP_CTRL_IRQ_ENABLE, dev->mmio + HW_PXP_CTRL_SET);
	writel(BM_PXP_CTRL_ENABLE | BM_PXP_CTRL_ENABLE_CSC2 |
	       BM_PXP_CTRL_ENABLE_LUT | BM_PXP_CTRL_ENABLE_ROTATE0 |
	       BM_PXP_CTRL_ENABLE_PS_AS_OUT, dev->mmio + HW_PXP_CTRL_SET);

	return 0;
}

static void pxp_job_finish(struct pxp_dev *dev)
{
	struct pxp_ctx *curr_ctx;
	struct vb2_v4l2_buffer *src_vb, *dst_vb;
	unsigned long flags;

	curr_ctx = v4l2_m2m_get_curr_priv(dev->m2m_dev);

	if (curr_ctx == NULL) {
		pr_err("Instance released before the end of transaction\n");
		return;
	}

	src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
	dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);

	spin_lock_irqsave(&dev->irqlock, flags);
	v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
	v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
	spin_unlock_irqrestore(&dev->irqlock, flags);

	dprintk(curr_ctx->dev, "Finishing transaction\n");
	v4l2_m2m_job_finish(dev->m2m_dev, curr_ctx->fh.m2m_ctx);
}

/*
 * mem2mem callbacks
 */
static void pxp_device_run(void *priv)
{
	struct pxp_ctx *ctx = priv;
	struct vb2_v4l2_buffer *src_buf, *dst_buf;

	src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
	dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);

	pxp_start(ctx, src_buf, dst_buf);
}

static int pxp_job_ready(void *priv)
{
	struct pxp_ctx *ctx = priv;

	if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) < 1 ||
	    v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx) < 1) {
		dprintk(ctx->dev, "Not enough buffers available\n");
		return 0;
	}

	return 1;
}

static void pxp_job_abort(void *priv)
{
	struct pxp_ctx *ctx = priv;

	/* Will cancel the transaction in the next interrupt handler */
	ctx->aborting = 1;
}

/*
 * interrupt handler
 */
static irqreturn_t pxp_irq_handler(int irq, void *dev_id)
{
	struct pxp_dev *dev = dev_id;
	u32 stat;

	stat = readl(dev->mmio + HW_PXP_STAT);

	if (stat & BM_PXP_STAT_IRQ0) {
		/* we expect x = 0, y = height, irq0 = 1 */
		if (stat & ~(BM_PXP_STAT_BLOCKX | BM_PXP_STAT_BLOCKY |
			     BM_PXP_STAT_IRQ0))
			dprintk(dev, "%s: stat = 0x%08x\n", __func__, stat);
		writel(BM_PXP_STAT_IRQ0, dev->mmio + HW_PXP_STAT_CLR);

		pxp_job_finish(dev);
	} else {
		u32 irq = readl(dev->mmio + HW_PXP_IRQ);

		dprintk(dev, "%s: stat = 0x%08x\n", __func__, stat);
		dprintk(dev, "%s: irq = 0x%08x\n", __func__, irq);

		writel(irq, dev->mmio + HW_PXP_IRQ_CLR);
	}

	return IRQ_HANDLED;
}

/*
 * video ioctls
 */
static int pxp_querycap(struct file *file, void *priv,
			   struct v4l2_capability *cap)
{
	strscpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver));
	strscpy(cap->card, MEM2MEM_NAME, sizeof(cap->card));
	snprintf(cap->bus_info, sizeof(cap->bus_info),
			"platform:%s", MEM2MEM_NAME);
	return 0;
}

static int pxp_enum_fmt(struct v4l2_fmtdesc *f, u32 type)
{
	int i, num;
	struct pxp_fmt *fmt;

	num = 0;

	for (i = 0; i < NUM_FORMATS; ++i) {
		if (formats[i].types & type) {
			/* index-th format of type type found ? */
			if (num == f->index)
				break;
			/*
			 * Correct type but haven't reached our index yet,
			 * just increment per-type index
			 */
			++num;
		}
	}

	if (i < NUM_FORMATS) {
		/* Format found */
		fmt = &formats[i];
		f->pixelformat = fmt->fourcc;
		return 0;
	}

	/* Format not found */
	return -EINVAL;
}

static int pxp_enum_fmt_vid_cap(struct file *file, void *priv,
				struct v4l2_fmtdesc *f)
{
	return pxp_enum_fmt(f, MEM2MEM_CAPTURE);
}

static int pxp_enum_fmt_vid_out(struct file *file, void *priv,
				struct v4l2_fmtdesc *f)
{
	return pxp_enum_fmt(f, MEM2MEM_OUTPUT);
}

static int pxp_g_fmt(struct pxp_ctx *ctx, struct v4l2_format *f)
{
	struct vb2_queue *vq;
	struct pxp_q_data *q_data;

	vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
	if (!vq)
		return -EINVAL;

	q_data = get_q_data(ctx, f->type);

	f->fmt.pix.width	= q_data->width;
	f->fmt.pix.height	= q_data->height;
	f->fmt.pix.field	= V4L2_FIELD_NONE;
	f->fmt.pix.pixelformat	= q_data->fmt->fourcc;
	f->fmt.pix.bytesperline	= q_data->bytesperline;
	f->fmt.pix.sizeimage	= q_data->sizeimage;
	f->fmt.pix.colorspace	= ctx->colorspace;
	f->fmt.pix.xfer_func	= ctx->xfer_func;
	f->fmt.pix.ycbcr_enc	= q_data->ycbcr_enc;
	f->fmt.pix.quantization	= q_data->quant;

	return 0;
}

static int pxp_g_fmt_vid_out(struct file *file, void *priv,
				struct v4l2_format *f)
{
	return pxp_g_fmt(file2ctx(file), f);
}

static int pxp_g_fmt_vid_cap(struct file *file, void *priv,
				struct v4l2_format *f)
{
	return pxp_g_fmt(file2ctx(file), f);
}

static inline u32 pxp_bytesperline(struct pxp_fmt *fmt, u32 width)
{
	switch (fmt->fourcc) {
	case V4L2_PIX_FMT_YUV420:
	case V4L2_PIX_FMT_NV12:
	case V4L2_PIX_FMT_NV21:
	case V4L2_PIX_FMT_YUV422P:
	case V4L2_PIX_FMT_NV16:
	case V4L2_PIX_FMT_NV61:
		return width;
	default:
		return (width * fmt->depth) >> 3;
	}
}

static inline u32 pxp_sizeimage(struct pxp_fmt *fmt, u32 width, u32 height)
{
	return (fmt->depth * width * height) >> 3;
}

static int pxp_try_fmt(struct v4l2_format *f, struct pxp_fmt *fmt)
{
	v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W, ALIGN_W,
			      &f->fmt.pix.height, MIN_H, MAX_H, ALIGN_H, 0);

	f->fmt.pix.bytesperline = pxp_bytesperline(fmt, f->fmt.pix.width);
	f->fmt.pix.sizeimage = pxp_sizeimage(fmt, f->fmt.pix.width,
					     f->fmt.pix.height);
	f->fmt.pix.field = V4L2_FIELD_NONE;

	return 0;
}

static void
pxp_fixup_colorimetry_cap(struct pxp_ctx *ctx, u32 dst_fourcc,
			  enum v4l2_ycbcr_encoding *ycbcr_enc,
			  enum v4l2_quantization *quantization)
{
	bool dst_is_yuv = pxp_v4l2_pix_fmt_is_yuv(dst_fourcc);

	if (pxp_v4l2_pix_fmt_is_yuv(ctx->q_data[V4L2_M2M_SRC].fmt->fourcc) ==
	    dst_is_yuv) {
		/*
		 * There is no support for conversion between different YCbCr
		 * encodings or between RGB limited and full range.
		 */
		*ycbcr_enc = ctx->q_data[V4L2_M2M_SRC].ycbcr_enc;
		*quantization = ctx->q_data[V4L2_M2M_SRC].quant;
	} else {
		*ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(ctx->colorspace);
		*quantization = V4L2_MAP_QUANTIZATION_DEFAULT(!dst_is_yuv,
							      ctx->colorspace,
							      *ycbcr_enc);
	}
}

static int pxp_try_fmt_vid_cap(struct file *file, void *priv,
			       struct v4l2_format *f)
{
	struct pxp_fmt *fmt;
	struct pxp_ctx *ctx = file2ctx(file);

	fmt = find_format(f);
	if (!fmt) {
		f->fmt.pix.pixelformat = formats[0].fourcc;
		fmt = find_format(f);
	}
	if (!(fmt->types & MEM2MEM_CAPTURE)) {
		v4l2_err(&ctx->dev->v4l2_dev,
			 "Fourcc format (0x%08x) invalid.\n",
			 f->fmt.pix.pixelformat);
		return -EINVAL;
	}

	f->fmt.pix.colorspace = ctx->colorspace;
	f->fmt.pix.xfer_func = ctx->xfer_func;

	pxp_fixup_colorimetry_cap(ctx, fmt->fourcc,
				  &f->fmt.pix.ycbcr_enc,
				  &f->fmt.pix.quantization);

	return pxp_try_fmt(f, fmt);
}

static int pxp_try_fmt_vid_out(struct file *file, void *priv,
			       struct v4l2_format *f)
{
	struct pxp_fmt *fmt;
	struct pxp_ctx *ctx = file2ctx(file);

	fmt = find_format(f);
	if (!fmt) {
		f->fmt.pix.pixelformat = formats[0].fourcc;
		fmt = find_format(f);
	}
	if (!(fmt->types & MEM2MEM_OUTPUT)) {
		v4l2_err(&ctx->dev->v4l2_dev,
			 "Fourcc format (0x%08x) invalid.\n",
			 f->fmt.pix.pixelformat);
		return -EINVAL;
	}

	if (!f->fmt.pix.colorspace)
		f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;

	return pxp_try_fmt(f, fmt);
}

static int pxp_s_fmt(struct pxp_ctx *ctx, struct v4l2_format *f)
{
	struct pxp_q_data *q_data;
	struct vb2_queue *vq;

	vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
	if (!vq)
		return -EINVAL;

	q_data = get_q_data(ctx, f->type);
	if (!q_data)
		return -EINVAL;

	if (vb2_is_busy(vq)) {
		v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
		return -EBUSY;
	}

	q_data->fmt		= find_format(f);
	q_data->width		= f->fmt.pix.width;
	q_data->height		= f->fmt.pix.height;
	q_data->bytesperline	= f->fmt.pix.bytesperline;
	q_data->sizeimage	= f->fmt.pix.sizeimage;

	dprintk(ctx->dev,
		"Setting format for type %d, wxh: %dx%d, fmt: %d\n",
		f->type, q_data->width, q_data->height, q_data->fmt->fourcc);

	return 0;
}

static int pxp_s_fmt_vid_cap(struct file *file, void *priv,
			     struct v4l2_format *f)
{
	struct pxp_ctx *ctx = file2ctx(file);
	int ret;

	ret = pxp_try_fmt_vid_cap(file, priv, f);
	if (ret)
		return ret;

	ret = pxp_s_fmt(file2ctx(file), f);
	if (ret)
		return ret;

	ctx->q_data[V4L2_M2M_DST].ycbcr_enc = f->fmt.pix.ycbcr_enc;
	ctx->q_data[V4L2_M2M_DST].quant = f->fmt.pix.quantization;

	return 0;
}

static int pxp_s_fmt_vid_out(struct file *file, void *priv,
			     struct v4l2_format *f)
{
	struct pxp_ctx *ctx = file2ctx(file);
	int ret;

	ret = pxp_try_fmt_vid_out(file, priv, f);
	if (ret)
		return ret;

	ret = pxp_s_fmt(file2ctx(file), f);
	if (ret)
		return ret;

	ctx->colorspace = f->fmt.pix.colorspace;
	ctx->xfer_func = f->fmt.pix.xfer_func;
	ctx->q_data[V4L2_M2M_SRC].ycbcr_enc = f->fmt.pix.ycbcr_enc;
	ctx->q_data[V4L2_M2M_SRC].quant = f->fmt.pix.quantization;

	pxp_fixup_colorimetry_cap(ctx, ctx->q_data[V4L2_M2M_DST].fmt->fourcc,
				  &ctx->q_data[V4L2_M2M_DST].ycbcr_enc,
				  &ctx->q_data[V4L2_M2M_DST].quant);

	return 0;
}

static int pxp_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct pxp_ctx *ctx =
		container_of(ctrl->handler, struct pxp_ctx, hdl);

	switch (ctrl->id) {
	case V4L2_CID_HFLIP:
		if (ctrl->val)
			ctx->mode |= MEM2MEM_HFLIP;
		else
			ctx->mode &= ~MEM2MEM_HFLIP;
		break;

	case V4L2_CID_VFLIP:
		if (ctrl->val)
			ctx->mode |= MEM2MEM_VFLIP;
		else
			ctx->mode &= ~MEM2MEM_VFLIP;
		break;

	case V4L2_CID_ALPHA_COMPONENT:
		ctx->alpha_component = ctrl->val;
		break;

	default:
		v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n");
		return -EINVAL;
	}

	return 0;
}

static const struct v4l2_ctrl_ops pxp_ctrl_ops = {
	.s_ctrl = pxp_s_ctrl,
};

static const struct v4l2_ioctl_ops pxp_ioctl_ops = {
	.vidioc_querycap	= pxp_querycap,

	.vidioc_enum_fmt_vid_cap = pxp_enum_fmt_vid_cap,
	.vidioc_g_fmt_vid_cap	= pxp_g_fmt_vid_cap,
	.vidioc_try_fmt_vid_cap	= pxp_try_fmt_vid_cap,
	.vidioc_s_fmt_vid_cap	= pxp_s_fmt_vid_cap,

	.vidioc_enum_fmt_vid_out = pxp_enum_fmt_vid_out,
	.vidioc_g_fmt_vid_out	= pxp_g_fmt_vid_out,
	.vidioc_try_fmt_vid_out	= pxp_try_fmt_vid_out,
	.vidioc_s_fmt_vid_out	= pxp_s_fmt_vid_out,

	.vidioc_reqbufs		= v4l2_m2m_ioctl_reqbufs,
	.vidioc_querybuf	= v4l2_m2m_ioctl_querybuf,
	.vidioc_qbuf		= v4l2_m2m_ioctl_qbuf,
	.vidioc_dqbuf		= v4l2_m2m_ioctl_dqbuf,
	.vidioc_prepare_buf	= v4l2_m2m_ioctl_prepare_buf,
	.vidioc_create_bufs	= v4l2_m2m_ioctl_create_bufs,
	.vidioc_expbuf		= v4l2_m2m_ioctl_expbuf,

	.vidioc_streamon	= v4l2_m2m_ioctl_streamon,
	.vidioc_streamoff	= v4l2_m2m_ioctl_streamoff,

	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};

/*
 * Queue operations
 */
static int pxp_queue_setup(struct vb2_queue *vq,
			   unsigned int *nbuffers, unsigned int *nplanes,
			   unsigned int sizes[], struct device *alloc_devs[])
{
	struct pxp_ctx *ctx = vb2_get_drv_priv(vq);
	struct pxp_q_data *q_data;
	unsigned int size, count = *nbuffers;

	q_data = get_q_data(ctx, vq->type);

	size = q_data->sizeimage;

	*nbuffers = count;

	if (*nplanes)
		return sizes[0] < size ? -EINVAL : 0;

	*nplanes = 1;
	sizes[0] = size;

	dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);

	return 0;
}

static int pxp_buf_prepare(struct vb2_buffer *vb)
{
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct pxp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
	struct pxp_dev *dev = ctx->dev;
	struct pxp_q_data *q_data;

	dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);

	q_data = get_q_data(ctx, vb->vb2_queue->type);
	if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
		if (vbuf->field == V4L2_FIELD_ANY)
			vbuf->field = V4L2_FIELD_NONE;
		if (vbuf->field != V4L2_FIELD_NONE) {
			dprintk(dev, "%s field isn't supported\n", __func__);
			return -EINVAL;
		}
	}

	if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
		dprintk(dev, "%s data will not fit into plane (%lu < %lu)\n",
			__func__, vb2_plane_size(vb, 0),
			(long)q_data->sizeimage);
		return -EINVAL;
	}

	vb2_set_plane_payload(vb, 0, q_data->sizeimage);

	return 0;
}

static void pxp_buf_queue(struct vb2_buffer *vb)
{
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct pxp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);

	v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
}

static int pxp_start_streaming(struct vb2_queue *q, unsigned int count)
{
	struct pxp_ctx *ctx = vb2_get_drv_priv(q);
	struct pxp_q_data *q_data = get_q_data(ctx, q->type);

	q_data->sequence = 0;
	return 0;
}

static void pxp_stop_streaming(struct vb2_queue *q)
{
	struct pxp_ctx *ctx = vb2_get_drv_priv(q);
	struct vb2_v4l2_buffer *vbuf;
	unsigned long flags;

	for (;;) {
		if (V4L2_TYPE_IS_OUTPUT(q->type))
			vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
		else
			vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
		if (vbuf == NULL)
			return;
		spin_lock_irqsave(&ctx->dev->irqlock, flags);
		v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
		spin_unlock_irqrestore(&ctx->dev->irqlock, flags);
	}
}

static const struct vb2_ops pxp_qops = {
	.queue_setup	 = pxp_queue_setup,
	.buf_prepare	 = pxp_buf_prepare,
	.buf_queue	 = pxp_buf_queue,
	.start_streaming = pxp_start_streaming,
	.stop_streaming  = pxp_stop_streaming,
	.wait_prepare	 = vb2_ops_wait_prepare,
	.wait_finish	 = vb2_ops_wait_finish,
};

static int queue_init(void *priv, struct vb2_queue *src_vq,
		      struct vb2_queue *dst_vq)
{
	struct pxp_ctx *ctx = priv;
	int ret;

	src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
	src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
	src_vq->drv_priv = ctx;
	src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
	src_vq->ops = &pxp_qops;
	src_vq->mem_ops = &vb2_dma_contig_memops;
	src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
	src_vq->lock = &ctx->dev->dev_mutex;
	src_vq->dev = ctx->dev->v4l2_dev.dev;

	ret = vb2_queue_init(src_vq);
	if (ret)
		return ret;

	dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
	dst_vq->drv_priv = ctx;
	dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
	dst_vq->ops = &pxp_qops;
	dst_vq->mem_ops = &vb2_dma_contig_memops;
	dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
	dst_vq->lock = &ctx->dev->dev_mutex;
	dst_vq->dev = ctx->dev->v4l2_dev.dev;

	return vb2_queue_init(dst_vq);
}

/*
 * File operations
 */
static int pxp_open(struct file *file)
{
	struct pxp_dev *dev = video_drvdata(file);
	struct pxp_ctx *ctx = NULL;
	struct v4l2_ctrl_handler *hdl;
	int rc = 0;

	if (mutex_lock_interruptible(&dev->dev_mutex))
		return -ERESTARTSYS;
	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
	if (!ctx) {
		rc = -ENOMEM;
		goto open_unlock;
	}

	v4l2_fh_init(&ctx->fh, video_devdata(file));
	file->private_data = &ctx->fh;
	ctx->dev = dev;
	hdl = &ctx->hdl;
	v4l2_ctrl_handler_init(hdl, 4);
	v4l2_ctrl_new_std(hdl, &pxp_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
	v4l2_ctrl_new_std(hdl, &pxp_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
	v4l2_ctrl_new_std(hdl, &pxp_ctrl_ops, V4L2_CID_ALPHA_COMPONENT,
			  0, 255, 1, 255);
	if (hdl->error) {
		rc = hdl->error;
		v4l2_ctrl_handler_free(hdl);
		kfree(ctx);
		goto open_unlock;
	}
	ctx->fh.ctrl_handler = hdl;
	v4l2_ctrl_handler_setup(hdl);

	ctx->q_data[V4L2_M2M_SRC].fmt = &formats[0];
	ctx->q_data[V4L2_M2M_SRC].width = 640;
	ctx->q_data[V4L2_M2M_SRC].height = 480;
	ctx->q_data[V4L2_M2M_SRC].bytesperline =
		pxp_bytesperline(&formats[0], 640);
	ctx->q_data[V4L2_M2M_SRC].sizeimage =
		pxp_sizeimage(&formats[0], 640, 480);
	ctx->q_data[V4L2_M2M_DST] = ctx->q_data[V4L2_M2M_SRC];
	ctx->colorspace = V4L2_COLORSPACE_REC709;

	ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);

	if (IS_ERR(ctx->fh.m2m_ctx)) {
		rc = PTR_ERR(ctx->fh.m2m_ctx);

		v4l2_ctrl_handler_free(hdl);
		v4l2_fh_exit(&ctx->fh);
		kfree(ctx);
		goto open_unlock;
	}

	v4l2_fh_add(&ctx->fh);
	atomic_inc(&dev->num_inst);

	dprintk(dev, "Created instance: %p, m2m_ctx: %p\n",
		ctx, ctx->fh.m2m_ctx);

open_unlock:
	mutex_unlock(&dev->dev_mutex);
	return rc;
}

static int pxp_release(struct file *file)
{
	struct pxp_dev *dev = video_drvdata(file);
	struct pxp_ctx *ctx = file2ctx(file);

	dprintk(dev, "Releasing instance %p\n", ctx);

	v4l2_fh_del(&ctx->fh);
	v4l2_fh_exit(&ctx->fh);
	v4l2_ctrl_handler_free(&ctx->hdl);
	mutex_lock(&dev->dev_mutex);
	v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
	mutex_unlock(&dev->dev_mutex);
	kfree(ctx);

	atomic_dec(&dev->num_inst);

	return 0;
}

static const struct v4l2_file_operations pxp_fops = {
	.owner		= THIS_MODULE,
	.open		= pxp_open,
	.release	= pxp_release,
	.poll		= v4l2_m2m_fop_poll,
	.unlocked_ioctl	= video_ioctl2,
	.mmap		= v4l2_m2m_fop_mmap,
};

static const struct video_device pxp_videodev = {
	.name		= MEM2MEM_NAME,
	.vfl_dir	= VFL_DIR_M2M,
	.fops		= &pxp_fops,
	.device_caps	= V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING,
	.ioctl_ops	= &pxp_ioctl_ops,
	.minor		= -1,
	.release	= video_device_release_empty,
};

static const struct v4l2_m2m_ops m2m_ops = {
	.device_run	= pxp_device_run,
	.job_ready	= pxp_job_ready,
	.job_abort	= pxp_job_abort,
};

static int pxp_soft_reset(struct pxp_dev *dev)
{
	int ret;
	u32 val;

	writel(BM_PXP_CTRL_SFTRST, dev->mmio + HW_PXP_CTRL_CLR);
	writel(BM_PXP_CTRL_CLKGATE, dev->mmio + HW_PXP_CTRL_CLR);

	writel(BM_PXP_CTRL_SFTRST, dev->mmio + HW_PXP_CTRL_SET);

	ret = readl_poll_timeout(dev->mmio + HW_PXP_CTRL, val,
				 val & BM_PXP_CTRL_CLKGATE, 0, 100);
	if (ret < 0)
		return ret;

	writel(BM_PXP_CTRL_SFTRST, dev->mmio + HW_PXP_CTRL_CLR);
	writel(BM_PXP_CTRL_CLKGATE, dev->mmio + HW_PXP_CTRL_CLR);

	return 0;
}

static int pxp_probe(struct platform_device *pdev)
{
	struct pxp_dev *dev;
	struct resource *res;
	struct video_device *vfd;
	int irq;
	int ret;

	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
	if (!dev)
		return -ENOMEM;

	dev->clk = devm_clk_get(&pdev->dev, "axi");
	if (IS_ERR(dev->clk)) {
		ret = PTR_ERR(dev->clk);
		dev_err(&pdev->dev, "Failed to get clk: %d\n", ret);
		return ret;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	dev->mmio = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(dev->mmio)) {
		ret = PTR_ERR(dev->mmio);
		dev_err(&pdev->dev, "Failed to map register space: %d\n", ret);
		return ret;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0)
		return irq;

	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, pxp_irq_handler,
			IRQF_ONESHOT, dev_name(&pdev->dev), dev);
	if (ret < 0) {
		dev_err(&pdev->dev, "Failed to request irq: %d\n", ret);
		return ret;
	}

	ret = clk_prepare_enable(dev->clk);
	if (ret < 0)
		return ret;

	ret = pxp_soft_reset(dev);
	if (ret < 0) {
		dev_err(&pdev->dev, "PXP reset timeout: %d\n", ret);
		goto err_clk;
	}

	spin_lock_init(&dev->irqlock);

	ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
	if (ret)
		goto err_clk;

	atomic_set(&dev->num_inst, 0);
	mutex_init(&dev->dev_mutex);

	dev->vfd = pxp_videodev;
	vfd = &dev->vfd;
	vfd->lock = &dev->dev_mutex;
	vfd->v4l2_dev = &dev->v4l2_dev;

	video_set_drvdata(vfd, dev);
	snprintf(vfd->name, sizeof(vfd->name), "%s", pxp_videodev.name);
	v4l2_info(&dev->v4l2_dev,
			"Device registered as /dev/video%d\n", vfd->num);

	platform_set_drvdata(pdev, dev);

	dev->m2m_dev = v4l2_m2m_init(&m2m_ops);
	if (IS_ERR(dev->m2m_dev)) {
		v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
		ret = PTR_ERR(dev->m2m_dev);
		goto err_v4l2;
	}

	ret = video_register_device(vfd, VFL_TYPE_VIDEO, 0);
	if (ret) {
		v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
		goto err_m2m;
	}

	return 0;

err_m2m:
	v4l2_m2m_release(dev->m2m_dev);
err_v4l2:
	v4l2_device_unregister(&dev->v4l2_dev);
err_clk:
	clk_disable_unprepare(dev->clk);

	return ret;
}

static int pxp_remove(struct platform_device *pdev)
{
	struct pxp_dev *dev = platform_get_drvdata(pdev);

	writel(BM_PXP_CTRL_CLKGATE, dev->mmio + HW_PXP_CTRL_SET);
	writel(BM_PXP_CTRL_SFTRST, dev->mmio + HW_PXP_CTRL_SET);

	clk_disable_unprepare(dev->clk);

	v4l2_info(&dev->v4l2_dev, "Removing " MEM2MEM_NAME);
	video_unregister_device(&dev->vfd);
	v4l2_m2m_release(dev->m2m_dev);
	v4l2_device_unregister(&dev->v4l2_dev);

	return 0;
}

static const struct of_device_id pxp_dt_ids[] = {
	{ .compatible = "fsl,imx6ull-pxp", .data = NULL },
	{ },
};
MODULE_DEVICE_TABLE(of, pxp_dt_ids);

static struct platform_driver pxp_driver = {
	.probe		= pxp_probe,
	.remove		= pxp_remove,
	.driver		= {
		.name	= MEM2MEM_NAME,
		.of_match_table = of_match_ptr(pxp_dt_ids),
	},
};

module_platform_driver(pxp_driver);

MODULE_DESCRIPTION("i.MX PXP mem2mem scaler/CSC/rotator");
MODULE_AUTHOR("Philipp Zabel <kernel@pengutronix.de>");
MODULE_LICENSE("GPL");
