// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 Intel Corporation

#include <linux/device.h>
#include <linux/iopoll.h>
#include <linux/slab.h>

#include "ipu3-css.h"
#include "ipu3-css-fw.h"
#include "ipu3-css-params.h"
#include "ipu3-dmamap.h"
#include "ipu3-tables.h"

/* IRQ configuration */
#define IMGU_IRQCTRL_IRQ_MASK   (IMGU_IRQCTRL_IRQ_SP1 | \
                                 IMGU_IRQCTRL_IRQ_SP2 | \
                                 IMGU_IRQCTRL_IRQ_SW_PIN(0) | \
                                 IMGU_IRQCTRL_IRQ_SW_PIN(1))

#define IPU3_CSS_FORMAT_BPP_DEN 50      /* Denominator */

/* Some sane limits for resolutions */
#define IPU3_CSS_MIN_RES        32
#define IPU3_CSS_MAX_H          3136
#define IPU3_CSS_MAX_W          4224

/* minimal envelope size(GDC in - out) should be 4 */
#define MIN_ENVELOPE            4

/*
 * pre-allocated buffer size for CSS ABI, auxiliary frames
 * after BDS and before GDC. Those values should be tuned
 * to big enough to avoid buffer re-allocation when
 * streaming to lower streaming latency.
 */
#define CSS_ABI_SIZE    136
#define CSS_BDS_SIZE    (4480 * 3200 * 3)
#define CSS_GDC_SIZE    (4224 * 3200 * 12 / 8)

#define IPU3_CSS_QUEUE_TO_FLAGS(q)      (1 << (q))
#define IPU3_CSS_FORMAT_FL_IN           \
                        IPU3_CSS_QUEUE_TO_FLAGS(IPU3_CSS_QUEUE_IN)
#define IPU3_CSS_FORMAT_FL_OUT          \
                        IPU3_CSS_QUEUE_TO_FLAGS(IPU3_CSS_QUEUE_OUT)
#define IPU3_CSS_FORMAT_FL_VF           \
                        IPU3_CSS_QUEUE_TO_FLAGS(IPU3_CSS_QUEUE_VF)

/* Formats supported by IPU3 Camera Sub System */
static const struct imgu_css_format imgu_css_formats[] = {
        {
                .pixelformat = V4L2_PIX_FMT_NV12,
                .colorspace = V4L2_COLORSPACE_SRGB,
                .frame_format = IMGU_ABI_FRAME_FORMAT_NV12,
                .osys_format = IMGU_ABI_OSYS_FORMAT_NV12,
                .osys_tiling = IMGU_ABI_OSYS_TILING_NONE,
                .bytesperpixel_num = 1 * IPU3_CSS_FORMAT_BPP_DEN,
                .chroma_decim = 4,
                .width_align = IPU3_UAPI_ISP_VEC_ELEMS,
                .flags = IPU3_CSS_FORMAT_FL_OUT | IPU3_CSS_FORMAT_FL_VF,
        }, {
                /* Each 32 bytes contains 25 10-bit pixels */
                .pixelformat = V4L2_PIX_FMT_IPU3_SBGGR10,
                .colorspace = V4L2_COLORSPACE_RAW,
                .frame_format = IMGU_ABI_FRAME_FORMAT_RAW_PACKED,
                .bayer_order = IMGU_ABI_BAYER_ORDER_BGGR,
                .bit_depth = 10,
                .bytesperpixel_num = 64,
                .width_align = 2 * IPU3_UAPI_ISP_VEC_ELEMS,
                .flags = IPU3_CSS_FORMAT_FL_IN,
        }, {
                .pixelformat = V4L2_PIX_FMT_IPU3_SGBRG10,
                .colorspace = V4L2_COLORSPACE_RAW,
                .frame_format = IMGU_ABI_FRAME_FORMAT_RAW_PACKED,
                .bayer_order = IMGU_ABI_BAYER_ORDER_GBRG,
                .bit_depth = 10,
                .bytesperpixel_num = 64,
                .width_align = 2 * IPU3_UAPI_ISP_VEC_ELEMS,
                .flags = IPU3_CSS_FORMAT_FL_IN,
        }, {
                .pixelformat = V4L2_PIX_FMT_IPU3_SGRBG10,
                .colorspace = V4L2_COLORSPACE_RAW,
                .frame_format = IMGU_ABI_FRAME_FORMAT_RAW_PACKED,
                .bayer_order = IMGU_ABI_BAYER_ORDER_GRBG,
                .bit_depth = 10,
                .bytesperpixel_num = 64,
                .width_align = 2 * IPU3_UAPI_ISP_VEC_ELEMS,
                .flags = IPU3_CSS_FORMAT_FL_IN,
        }, {
                .pixelformat = V4L2_PIX_FMT_IPU3_SRGGB10,
                .colorspace = V4L2_COLORSPACE_RAW,
                .frame_format = IMGU_ABI_FRAME_FORMAT_RAW_PACKED,
                .bayer_order = IMGU_ABI_BAYER_ORDER_RGGB,
                .bit_depth = 10,
                .bytesperpixel_num = 64,
                .width_align = 2 * IPU3_UAPI_ISP_VEC_ELEMS,
                .flags = IPU3_CSS_FORMAT_FL_IN,
        },
};

static const struct {
        enum imgu_abi_queue_id qid;
        size_t ptr_ofs;
} imgu_css_queues[IPU3_CSS_QUEUES] = {
        [IPU3_CSS_QUEUE_IN] = {
                IMGU_ABI_QUEUE_C_ID,
                offsetof(struct imgu_abi_buffer, payload.frame.frame_data)
        },
        [IPU3_CSS_QUEUE_OUT] = {
                IMGU_ABI_QUEUE_D_ID,
                offsetof(struct imgu_abi_buffer, payload.frame.frame_data)
        },
        [IPU3_CSS_QUEUE_VF] = {
                IMGU_ABI_QUEUE_E_ID,
                offsetof(struct imgu_abi_buffer, payload.frame.frame_data)
        },
        [IPU3_CSS_QUEUE_STAT_3A] = {
                IMGU_ABI_QUEUE_F_ID,
                offsetof(struct imgu_abi_buffer, payload.s3a.data_ptr)
        },
};

/* Initialize queue based on given format, adjust format as needed */
static int imgu_css_queue_init(struct imgu_css_queue *queue,
                               struct v4l2_pix_format_mplane *fmt, u32 flags)
{
        struct v4l2_pix_format_mplane *const f = &queue->fmt.mpix;
        unsigned int i;
        u32 sizeimage;

        INIT_LIST_HEAD(&queue->bufs);

        queue->css_fmt = NULL;  /* Disable */
        if (!fmt)
                return 0;

        for (i = 0; i < ARRAY_SIZE(imgu_css_formats); i++) {
                if (!(imgu_css_formats[i].flags & flags))
                        continue;
                queue->css_fmt = &imgu_css_formats[i];
                if (imgu_css_formats[i].pixelformat == fmt->pixelformat)
                        break;
        }
        if (!queue->css_fmt)
                return -EINVAL; /* Could not find any suitable format */

        queue->fmt.mpix = *fmt;

        f->width = ALIGN(clamp_t(u32, f->width,
                                 IPU3_CSS_MIN_RES, IPU3_CSS_MAX_W), 2);
        f->height = ALIGN(clamp_t(u32, f->height,
                                  IPU3_CSS_MIN_RES, IPU3_CSS_MAX_H), 2);
        queue->width_pad = ALIGN(f->width, queue->css_fmt->width_align);
        if (queue->css_fmt->frame_format != IMGU_ABI_FRAME_FORMAT_RAW_PACKED)
                f->plane_fmt[0].bytesperline = DIV_ROUND_UP(queue->width_pad *
                                        queue->css_fmt->bytesperpixel_num,
                                        IPU3_CSS_FORMAT_BPP_DEN);
        else
                /* For packed raw, alignment for bpl is by 50 to the width */
                f->plane_fmt[0].bytesperline =
                                DIV_ROUND_UP(f->width,
                                             IPU3_CSS_FORMAT_BPP_DEN) *
                                             queue->css_fmt->bytesperpixel_num;

        sizeimage = f->height * f->plane_fmt[0].bytesperline;
        if (queue->css_fmt->chroma_decim)
                sizeimage += 2 * sizeimage / queue->css_fmt->chroma_decim;

        f->plane_fmt[0].sizeimage = sizeimage;
        f->field = V4L2_FIELD_NONE;
        f->num_planes = 1;
        f->colorspace = queue->css_fmt->colorspace;
        f->flags = 0;
        f->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
        f->quantization = V4L2_QUANTIZATION_DEFAULT;
        f->xfer_func = V4L2_XFER_FUNC_DEFAULT;
        memset(f->reserved, 0, sizeof(f->reserved));

        return 0;
}

static bool imgu_css_queue_enabled(struct imgu_css_queue *q)
{
        return q->css_fmt;
}

/******************* css hw *******************/

/* In the style of writesl() defined in include/asm-generic/io.h */
static inline void writes(const void *mem, ssize_t count, void __iomem *addr)
{
        if (count >= 4) {
                const u32 *buf = mem;

                count /= 4;
                do {
                        writel(*buf++, addr);
                        addr += 4;
                } while (--count);
        }
}

/* Wait until register `reg', masked with `mask', becomes `cmp' */
static int imgu_hw_wait(void __iomem *base, int reg, u32 mask, u32 cmp)
{
        u32 val;

        return readl_poll_timeout(base + reg, val, (val & mask) == cmp,
                                  1000, 100 * 1000);
}

/* Initialize the IPU3 CSS hardware and associated h/w blocks */

int imgu_css_set_powerup(struct device *dev, void __iomem *base,
                         unsigned int freq)
{
        u32 pm_ctrl, state, val;

        dev_dbg(dev, "%s with freq %u\n", __func__, freq);
        /* Clear the CSS busy signal */
        readl(base + IMGU_REG_GP_BUSY);
        writel(0, base + IMGU_REG_GP_BUSY);

        /* Wait for idle signal */
        if (imgu_hw_wait(base, IMGU_REG_STATE, IMGU_STATE_IDLE_STS,
                         IMGU_STATE_IDLE_STS)) {
                dev_err(dev, "failed to set CSS idle\n");
                goto fail;
        }

        /* Reset the css */
        writel(readl(base + IMGU_REG_PM_CTRL) | IMGU_PM_CTRL_FORCE_RESET,
               base + IMGU_REG_PM_CTRL);

        usleep_range(200, 300);

        /** Prepare CSS */

        pm_ctrl = readl(base + IMGU_REG_PM_CTRL);
        state = readl(base + IMGU_REG_STATE);

        dev_dbg(dev, "CSS pm_ctrl 0x%x state 0x%x (power %s)\n",
                pm_ctrl, state, state & IMGU_STATE_POWER_DOWN ? "down" : "up");

        /* Power up CSS using wrapper */
        if (state & IMGU_STATE_POWER_DOWN) {
                writel(IMGU_PM_CTRL_RACE_TO_HALT | IMGU_PM_CTRL_START,
                       base + IMGU_REG_PM_CTRL);
                if (imgu_hw_wait(base, IMGU_REG_PM_CTRL,
                                 IMGU_PM_CTRL_START, 0)) {
                        dev_err(dev, "failed to power up CSS\n");
                        goto fail;
                }
                usleep_range(2000, 3000);
        } else {
                writel(IMGU_PM_CTRL_RACE_TO_HALT, base + IMGU_REG_PM_CTRL);
        }

        /* Set the busy bit */
        writel(readl(base + IMGU_REG_GP_BUSY) | 1, base + IMGU_REG_GP_BUSY);

        /* Set CSS clock frequency */
        pm_ctrl = readl(base + IMGU_REG_PM_CTRL);
        val = pm_ctrl & ~(IMGU_PM_CTRL_CSS_PWRDN | IMGU_PM_CTRL_RST_AT_EOF);
        writel(val, base + IMGU_REG_PM_CTRL);
        writel(0, base + IMGU_REG_GP_BUSY);
        if (imgu_hw_wait(base, IMGU_REG_STATE,
                         IMGU_STATE_PWRDNM_FSM_MASK, 0)) {
                dev_err(dev, "failed to pwrdn CSS\n");
                goto fail;
        }
        val = (freq / IMGU_SYSTEM_REQ_FREQ_DIVIDER) & IMGU_SYSTEM_REQ_FREQ_MASK;
        writel(val, base + IMGU_REG_SYSTEM_REQ);
        writel(1, base + IMGU_REG_GP_BUSY);
        writel(readl(base + IMGU_REG_PM_CTRL) | IMGU_PM_CTRL_FORCE_HALT,
               base + IMGU_REG_PM_CTRL);
        if (imgu_hw_wait(base, IMGU_REG_STATE, IMGU_STATE_HALT_STS,
                         IMGU_STATE_HALT_STS)) {
                dev_err(dev, "failed to halt CSS\n");
                goto fail;
        }

        writel(readl(base + IMGU_REG_PM_CTRL) | IMGU_PM_CTRL_START,
               base + IMGU_REG_PM_CTRL);
        if (imgu_hw_wait(base, IMGU_REG_PM_CTRL, IMGU_PM_CTRL_START, 0)) {
                dev_err(dev, "failed to start CSS\n");
                goto fail;
        }
        writel(readl(base + IMGU_REG_PM_CTRL) | IMGU_PM_CTRL_FORCE_UNHALT,
               base + IMGU_REG_PM_CTRL);

        val = readl(base + IMGU_REG_PM_CTRL);   /* get pm_ctrl */
        val &= ~(IMGU_PM_CTRL_CSS_PWRDN | IMGU_PM_CTRL_RST_AT_EOF);
        val |= pm_ctrl & (IMGU_PM_CTRL_CSS_PWRDN | IMGU_PM_CTRL_RST_AT_EOF);
        writel(val, base + IMGU_REG_PM_CTRL);

        return 0;

fail:
        imgu_css_set_powerdown(dev, base);
        return -EIO;
}

void imgu_css_set_powerdown(struct device *dev, void __iomem *base)
{
        dev_dbg(dev, "%s\n", __func__);
        /* wait for cio idle signal */
        if (imgu_hw_wait(base, IMGU_REG_CIO_GATE_BURST_STATE,
                         IMGU_CIO_GATE_BURST_MASK, 0))
                dev_warn(dev, "wait cio gate idle timeout");

        /* wait for css idle signal */
        if (imgu_hw_wait(base, IMGU_REG_STATE, IMGU_STATE_IDLE_STS,
                         IMGU_STATE_IDLE_STS))
                dev_warn(dev, "wait css idle timeout\n");

        /* do halt-halted handshake with css */
        writel(1, base + IMGU_REG_GP_HALT);
        if (imgu_hw_wait(base, IMGU_REG_STATE, IMGU_STATE_HALT_STS,
                         IMGU_STATE_HALT_STS))
                dev_warn(dev, "failed to halt css");

        /* de-assert the busy bit */
        writel(0, base + IMGU_REG_GP_BUSY);
}

static void imgu_css_hw_enable_irq(struct imgu_css *css)
{
        void __iomem *const base = css->base;
        u32 val, i;

        /* Set up interrupts */

        /*
         * Enable IRQ on the SP which signals that SP goes to idle
         * (aka ready state) and set trigger to pulse
         */
        val = readl(base + IMGU_REG_SP_CTRL(0)) | IMGU_CTRL_IRQ_READY;
        writel(val, base + IMGU_REG_SP_CTRL(0));
        writel(val | IMGU_CTRL_IRQ_CLEAR, base + IMGU_REG_SP_CTRL(0));

        /* Enable IRQs from the IMGU wrapper */
        writel(IMGU_REG_INT_CSS_IRQ, base + IMGU_REG_INT_ENABLE);
        /* Clear */
        writel(IMGU_REG_INT_CSS_IRQ, base + IMGU_REG_INT_STATUS);

        /* Enable IRQs from main IRQ controller */
        writel(~0, base + IMGU_REG_IRQCTRL_EDGE_NOT_PULSE(IMGU_IRQCTRL_MAIN));
        writel(0, base + IMGU_REG_IRQCTRL_MASK(IMGU_IRQCTRL_MAIN));
        writel(IMGU_IRQCTRL_IRQ_MASK,
               base + IMGU_REG_IRQCTRL_EDGE(IMGU_IRQCTRL_MAIN));
        writel(IMGU_IRQCTRL_IRQ_MASK,
               base + IMGU_REG_IRQCTRL_ENABLE(IMGU_IRQCTRL_MAIN));
        writel(IMGU_IRQCTRL_IRQ_MASK,
               base + IMGU_REG_IRQCTRL_CLEAR(IMGU_IRQCTRL_MAIN));
        writel(IMGU_IRQCTRL_IRQ_MASK,
               base + IMGU_REG_IRQCTRL_MASK(IMGU_IRQCTRL_MAIN));
        /* Wait for write complete */
        readl(base + IMGU_REG_IRQCTRL_ENABLE(IMGU_IRQCTRL_MAIN));

        /* Enable IRQs from SP0 and SP1 controllers */
        for (i = IMGU_IRQCTRL_SP0; i <= IMGU_IRQCTRL_SP1; i++) {
                writel(~0, base + IMGU_REG_IRQCTRL_EDGE_NOT_PULSE(i));
                writel(0, base + IMGU_REG_IRQCTRL_MASK(i));
                writel(IMGU_IRQCTRL_IRQ_MASK, base + IMGU_REG_IRQCTRL_EDGE(i));
                writel(IMGU_IRQCTRL_IRQ_MASK,
                       base + IMGU_REG_IRQCTRL_ENABLE(i));
                writel(IMGU_IRQCTRL_IRQ_MASK, base + IMGU_REG_IRQCTRL_CLEAR(i));
                writel(IMGU_IRQCTRL_IRQ_MASK, base + IMGU_REG_IRQCTRL_MASK(i));
                /* Wait for write complete */
                readl(base + IMGU_REG_IRQCTRL_ENABLE(i));
        }
}

static int imgu_css_hw_init(struct imgu_css *css)
{
        /* For checking that streaming monitor statuses are valid */
        static const struct {
                u32 reg;
                u32 mask;
                const char *name;
        } stream_monitors[] = {
                {
                        IMGU_REG_GP_SP1_STRMON_STAT,
                        IMGU_GP_STRMON_STAT_ISP_PORT_SP12ISP,
                        "ISP0 to SP0"
                }, {
                        IMGU_REG_GP_ISP_STRMON_STAT,
                        IMGU_GP_STRMON_STAT_SP1_PORT_ISP2SP1,
                        "SP0 to ISP0"
                }, {
                        IMGU_REG_GP_MOD_STRMON_STAT,
                        IMGU_GP_STRMON_STAT_MOD_PORT_ISP2DMA,
                        "ISP0 to DMA0"
                }, {
                        IMGU_REG_GP_ISP_STRMON_STAT,
                        IMGU_GP_STRMON_STAT_ISP_PORT_DMA2ISP,
                        "DMA0 to ISP0"
                }, {
                        IMGU_REG_GP_MOD_STRMON_STAT,
                        IMGU_GP_STRMON_STAT_MOD_PORT_CELLS2GDC,
                        "ISP0 to GDC0"
                }, {
                        IMGU_REG_GP_MOD_STRMON_STAT,
                        IMGU_GP_STRMON_STAT_MOD_PORT_GDC2CELLS,
                        "GDC0 to ISP0"
                }, {
                        IMGU_REG_GP_MOD_STRMON_STAT,
                        IMGU_GP_STRMON_STAT_MOD_PORT_SP12DMA,
                        "SP0 to DMA0"
                }, {
                        IMGU_REG_GP_SP1_STRMON_STAT,
                        IMGU_GP_STRMON_STAT_SP1_PORT_DMA2SP1,
                        "DMA0 to SP0"
                }, {
                        IMGU_REG_GP_MOD_STRMON_STAT,
                        IMGU_GP_STRMON_STAT_MOD_PORT_CELLS2GDC,
                        "SP0 to GDC0"
                }, {
                        IMGU_REG_GP_MOD_STRMON_STAT,
                        IMGU_GP_STRMON_STAT_MOD_PORT_GDC2CELLS,
                        "GDC0 to SP0"
                },
        };

        struct device *dev = css->dev;
        void __iomem *const base = css->base;
        u32 val, i;

        /* Set instruction cache address and inv bit for ISP, SP, and SP1 */
        for (i = 0; i < IMGU_NUM_SP; i++) {
                struct imgu_fw_info *bi =
                                        &css->fwp->binary_header[css->fw_sp[i]];

                writel(css->binary[css->fw_sp[i]].daddr,
                       base + IMGU_REG_SP_ICACHE_ADDR(bi->type));
                writel(readl(base + IMGU_REG_SP_CTRL(bi->type)) |
                       IMGU_CTRL_ICACHE_INV,
                       base + IMGU_REG_SP_CTRL(bi->type));
        }
        writel(css->binary[css->fw_bl].daddr, base + IMGU_REG_ISP_ICACHE_ADDR);
        writel(readl(base + IMGU_REG_ISP_CTRL) | IMGU_CTRL_ICACHE_INV,
               base + IMGU_REG_ISP_CTRL);

        /* Check that IMGU hardware is ready */

        if (!(readl(base + IMGU_REG_SP_CTRL(0)) & IMGU_CTRL_IDLE)) {
                dev_err(dev, "SP is not idle\n");
                return -EIO;
        }
        if (!(readl(base + IMGU_REG_ISP_CTRL) & IMGU_CTRL_IDLE)) {
                dev_err(dev, "ISP is not idle\n");
                return -EIO;
        }

        for (i = 0; i < ARRAY_SIZE(stream_monitors); i++) {
                val = readl(base + stream_monitors[i].reg);
                if (val & stream_monitors[i].mask) {
                        dev_err(dev, "error: Stream monitor %s is valid\n",
                                stream_monitors[i].name);
                        return -EIO;
                }
        }

        /* Initialize GDC with default values */

        for (i = 0; i < ARRAY_SIZE(imgu_css_gdc_lut[0]); i++) {
                u32 val0 = imgu_css_gdc_lut[0][i] & IMGU_GDC_LUT_MASK;
                u32 val1 = imgu_css_gdc_lut[1][i] & IMGU_GDC_LUT_MASK;
                u32 val2 = imgu_css_gdc_lut[2][i] & IMGU_GDC_LUT_MASK;
                u32 val3 = imgu_css_gdc_lut[3][i] & IMGU_GDC_LUT_MASK;

                writel(val0 | (val1 << 16),
                       base + IMGU_REG_GDC_LUT_BASE + i * 8);
                writel(val2 | (val3 << 16),
                       base + IMGU_REG_GDC_LUT_BASE + i * 8 + 4);
        }

        return 0;
}

/* Boot the given IPU3 CSS SP */
static int imgu_css_hw_start_sp(struct imgu_css *css, int sp)
{
        void __iomem *const base = css->base;
        struct imgu_fw_info *bi = &css->fwp->binary_header[css->fw_sp[sp]];
        struct imgu_abi_sp_init_dmem_cfg dmem_cfg = {
                .ddr_data_addr = css->binary[css->fw_sp[sp]].daddr
                        + bi->blob.data_source,
                .dmem_data_addr = bi->blob.data_target,
                .dmem_bss_addr = bi->blob.bss_target,
                .data_size = bi->blob.data_size,
                .bss_size = bi->blob.bss_size,
                .sp_id = sp,
        };

        writes(&dmem_cfg, sizeof(dmem_cfg), base +
               IMGU_REG_SP_DMEM_BASE(sp) + bi->info.sp.init_dmem_data);

        writel(bi->info.sp.sp_entry, base + IMGU_REG_SP_START_ADDR(sp));

        writel(readl(base + IMGU_REG_SP_CTRL(sp))
                | IMGU_CTRL_START | IMGU_CTRL_RUN, base + IMGU_REG_SP_CTRL(sp));

        if (imgu_hw_wait(css->base, IMGU_REG_SP_DMEM_BASE(sp)
                         + bi->info.sp.sw_state,
                         ~0, IMGU_ABI_SP_SWSTATE_INITIALIZED))
                return -EIO;

        return 0;
}

/* Start the IPU3 CSS ImgU (Imaging Unit) and all the SPs */
static int imgu_css_hw_start(struct imgu_css *css)
{
        static const u32 event_mask =
                ((1 << IMGU_ABI_EVTTYPE_OUT_FRAME_DONE) |
                (1 << IMGU_ABI_EVTTYPE_2ND_OUT_FRAME_DONE) |
                (1 << IMGU_ABI_EVTTYPE_VF_OUT_FRAME_DONE) |
                (1 << IMGU_ABI_EVTTYPE_2ND_VF_OUT_FRAME_DONE) |
                (1 << IMGU_ABI_EVTTYPE_3A_STATS_DONE) |
                (1 << IMGU_ABI_EVTTYPE_DIS_STATS_DONE) |
                (1 << IMGU_ABI_EVTTYPE_PIPELINE_DONE) |
                (1 << IMGU_ABI_EVTTYPE_FRAME_TAGGED) |
                (1 << IMGU_ABI_EVTTYPE_INPUT_FRAME_DONE) |
                (1 << IMGU_ABI_EVTTYPE_METADATA_DONE) |
                (1 << IMGU_ABI_EVTTYPE_ACC_STAGE_COMPLETE))
                << IMGU_ABI_SP_COMM_EVENT_IRQ_MASK_OR_SHIFT;

        void __iomem *const base = css->base;
        struct imgu_fw_info *bi, *bl = &css->fwp->binary_header[css->fw_bl];
        unsigned int i;

        writel(IMGU_TLB_INVALIDATE, base + IMGU_REG_TLB_INVALIDATE);

        /* Start bootloader */

        writel(IMGU_ABI_BL_SWSTATE_BUSY,
               base + IMGU_REG_ISP_DMEM_BASE + bl->info.bl.sw_state);
        writel(IMGU_NUM_SP,
               base + IMGU_REG_ISP_DMEM_BASE + bl->info.bl.num_dma_cmds);

        for (i = 0; i < IMGU_NUM_SP; i++) {
                int j = IMGU_NUM_SP - i - 1;    /* load sp1 first, then sp0 */
                struct imgu_fw_info *sp =
                                        &css->fwp->binary_header[css->fw_sp[j]];
                struct imgu_abi_bl_dma_cmd_entry dma_cmd = {
                        .src_addr = css->binary[css->fw_sp[j]].daddr
                                + sp->blob.text_source,
                        .size = sp->blob.text_size,
                        .dst_type = IMGU_ABI_BL_DMACMD_TYPE_SP_PMEM,
                        .dst_addr = IMGU_SP_PMEM_BASE(j),
                };

                writes(&dma_cmd, sizeof(dma_cmd),
                       base + IMGU_REG_ISP_DMEM_BASE + i * sizeof(dma_cmd) +
                       bl->info.bl.dma_cmd_list);
        }

        writel(bl->info.bl.bl_entry, base + IMGU_REG_ISP_START_ADDR);

        writel(readl(base + IMGU_REG_ISP_CTRL)
                | IMGU_CTRL_START | IMGU_CTRL_RUN, base + IMGU_REG_ISP_CTRL);
        if (imgu_hw_wait(css->base, IMGU_REG_ISP_DMEM_BASE
                         + bl->info.bl.sw_state, ~0,
                         IMGU_ABI_BL_SWSTATE_OK)) {
                dev_err(css->dev, "failed to start bootloader\n");
                return -EIO;
        }

        /* Start ISP */

        memset(css->xmem_sp_group_ptrs.vaddr, 0,
               sizeof(struct imgu_abi_sp_group));

        bi = &css->fwp->binary_header[css->fw_sp[0]];

        writel(css->xmem_sp_group_ptrs.daddr,
               base + IMGU_REG_SP_DMEM_BASE(0) + bi->info.sp.per_frame_data);

        writel(IMGU_ABI_SP_SWSTATE_TERMINATED,
               base + IMGU_REG_SP_DMEM_BASE(0) + bi->info.sp.sw_state);
        writel(1, base + IMGU_REG_SP_DMEM_BASE(0) + bi->info.sp.invalidate_tlb);

        if (imgu_css_hw_start_sp(css, 0))
                return -EIO;

        writel(0, base + IMGU_REG_SP_DMEM_BASE(0) + bi->info.sp.isp_started);
        writel(0, base + IMGU_REG_SP_DMEM_BASE(0) +
                bi->info.sp.host_sp_queues_initialized);
        writel(0, base + IMGU_REG_SP_DMEM_BASE(0) + bi->info.sp.sleep_mode);
        writel(0, base + IMGU_REG_SP_DMEM_BASE(0) + bi->info.sp.invalidate_tlb);
        writel(IMGU_ABI_SP_COMM_COMMAND_READY, base + IMGU_REG_SP_DMEM_BASE(0)
                + bi->info.sp.host_sp_com + IMGU_ABI_SP_COMM_COMMAND);

        /* Enable all events for all queues */

        for (i = 0; i < IPU3_CSS_PIPE_ID_NUM; i++)
                writel(event_mask, base + IMGU_REG_SP_DMEM_BASE(0)
                        + bi->info.sp.host_sp_com
                        + IMGU_ABI_SP_COMM_EVENT_IRQ_MASK(i));
        writel(1, base + IMGU_REG_SP_DMEM_BASE(0) +
                bi->info.sp.host_sp_queues_initialized);

        /* Start SP1 */

        bi = &css->fwp->binary_header[css->fw_sp[1]];

        writel(IMGU_ABI_SP_SWSTATE_TERMINATED,
               base + IMGU_REG_SP_DMEM_BASE(1) + bi->info.sp.sw_state);

        if (imgu_css_hw_start_sp(css, 1))
                return -EIO;

        writel(IMGU_ABI_SP_COMM_COMMAND_READY, base + IMGU_REG_SP_DMEM_BASE(1)
                + bi->info.sp.host_sp_com + IMGU_ABI_SP_COMM_COMMAND);

        return 0;
}

static void imgu_css_hw_stop(struct imgu_css *css)
{
        void __iomem *const base = css->base;
        struct imgu_fw_info *bi = &css->fwp->binary_header[css->fw_sp[0]];

        /* Stop fw */
        writel(IMGU_ABI_SP_COMM_COMMAND_TERMINATE,
               base + IMGU_REG_SP_DMEM_BASE(0) +
               bi->info.sp.host_sp_com + IMGU_ABI_SP_COMM_COMMAND);
        if (imgu_hw_wait(css->base, IMGU_REG_SP_CTRL(0),
                         IMGU_CTRL_IDLE, IMGU_CTRL_IDLE))
                dev_err(css->dev, "wait sp0 idle timeout.\n");
        if (readl(base + IMGU_REG_SP_DMEM_BASE(0) + bi->info.sp.sw_state) !=
                  IMGU_ABI_SP_SWSTATE_TERMINATED)
                dev_err(css->dev, "sp0 is not terminated.\n");
        if (imgu_hw_wait(css->base, IMGU_REG_ISP_CTRL,
                         IMGU_CTRL_IDLE, IMGU_CTRL_IDLE))
                dev_err(css->dev, "wait isp idle timeout\n");
}

static void imgu_css_hw_cleanup(struct imgu_css *css)
{
        void __iomem *const base = css->base;

        /** Reset CSS **/

        /* Clear the CSS busy signal */
        readl(base + IMGU_REG_GP_BUSY);
        writel(0, base + IMGU_REG_GP_BUSY);

        /* Wait for idle signal */
        if (imgu_hw_wait(css->base, IMGU_REG_STATE, IMGU_STATE_IDLE_STS,
                         IMGU_STATE_IDLE_STS))
                dev_err(css->dev, "failed to shut down hw cleanly\n");

        /* Reset the css */
        writel(readl(base + IMGU_REG_PM_CTRL) | IMGU_PM_CTRL_FORCE_RESET,
               base + IMGU_REG_PM_CTRL);

        usleep_range(200, 300);
}

static void imgu_css_pipeline_cleanup(struct imgu_css *css, unsigned int pipe)
{
        struct imgu_device *imgu = dev_get_drvdata(css->dev);
        unsigned int i;

        imgu_css_pool_cleanup(imgu,
                              &css->pipes[pipe].pool.parameter_set_info);
        imgu_css_pool_cleanup(imgu, &css->pipes[pipe].pool.acc);
        imgu_css_pool_cleanup(imgu, &css->pipes[pipe].pool.gdc);
        imgu_css_pool_cleanup(imgu, &css->pipes[pipe].pool.obgrid);

        for (i = 0; i < IMGU_ABI_NUM_MEMORIES; i++)
                imgu_css_pool_cleanup(imgu,
                                      &css->pipes[pipe].pool.binary_params_p[i]);
}

/*
 * This function initializes various stages of the
 * IPU3 CSS ISP pipeline
 */
static int imgu_css_pipeline_init(struct imgu_css *css, unsigned int pipe)
{
        static const int BYPC = 2;      /* Bytes per component */
        static const struct imgu_abi_buffer_sp buffer_sp_init = {
                .buf_src = {.queue_id = IMGU_ABI_QUEUE_EVENT_ID},
                .buf_type = IMGU_ABI_BUFFER_TYPE_INVALID,
        };

        struct imgu_abi_isp_iterator_config *cfg_iter;
        struct imgu_abi_isp_ref_config *cfg_ref;
        struct imgu_abi_isp_dvs_config *cfg_dvs;
        struct imgu_abi_isp_tnr3_config *cfg_tnr;
        struct imgu_abi_isp_ref_dmem_state *cfg_ref_state;
        struct imgu_abi_isp_tnr3_dmem_state *cfg_tnr_state;

        const int stage = 0;
        unsigned int i, j;

        struct imgu_css_pipe *css_pipe = &css->pipes[pipe];
        const struct imgu_fw_info *bi =
                        &css->fwp->binary_header[css_pipe->bindex];
        const unsigned int stripes = bi->info.isp.sp.iterator.num_stripes;

        struct imgu_fw_config_memory_offsets *cofs = (void *)css->fwp +
                bi->blob.memory_offsets.offsets[IMGU_ABI_PARAM_CLASS_CONFIG];
        struct imgu_fw_state_memory_offsets *sofs = (void *)css->fwp +
                bi->blob.memory_offsets.offsets[IMGU_ABI_PARAM_CLASS_STATE];

        struct imgu_abi_isp_stage *isp_stage;
        struct imgu_abi_sp_stage *sp_stage;
        struct imgu_abi_sp_group *sp_group;

        const unsigned int bds_width_pad =
                                ALIGN(css_pipe->rect[IPU3_CSS_RECT_BDS].width,
                                      2 * IPU3_UAPI_ISP_VEC_ELEMS);

        const enum imgu_abi_memories m0 = IMGU_ABI_MEM_ISP_DMEM0;
        enum imgu_abi_param_class cfg = IMGU_ABI_PARAM_CLASS_CONFIG;
        void *vaddr = css_pipe->binary_params_cs[cfg - 1][m0].vaddr;

        struct imgu_device *imgu = dev_get_drvdata(css->dev);

        dev_dbg(css->dev, "%s for pipe %d", __func__, pipe);

        /* Configure iterator */

        cfg_iter = imgu_css_fw_pipeline_params(css, pipe, cfg, m0,
                                               &cofs->dmem.iterator,
                                               sizeof(*cfg_iter), vaddr);
        if (!cfg_iter)
                goto bad_firmware;

        cfg_iter->input_info.res.width =
                                css_pipe->queue[IPU3_CSS_QUEUE_IN].fmt.mpix.width;
        cfg_iter->input_info.res.height =
                                css_pipe->queue[IPU3_CSS_QUEUE_IN].fmt.mpix.height;
        cfg_iter->input_info.padded_width =
                                css_pipe->queue[IPU3_CSS_QUEUE_IN].width_pad;
        cfg_iter->input_info.format =
                        css_pipe->queue[IPU3_CSS_QUEUE_IN].css_fmt->frame_format;
        cfg_iter->input_info.raw_bit_depth =
                        css_pipe->queue[IPU3_CSS_QUEUE_IN].css_fmt->bit_depth;
        cfg_iter->input_info.raw_bayer_order =
                        css_pipe->queue[IPU3_CSS_QUEUE_IN].css_fmt->bayer_order;
        cfg_iter->input_info.raw_type = IMGU_ABI_RAW_TYPE_BAYER;

        cfg_iter->internal_info.res.width = css_pipe->rect[IPU3_CSS_RECT_BDS].width;
        cfg_iter->internal_info.res.height =
                                        css_pipe->rect[IPU3_CSS_RECT_BDS].height;
        cfg_iter->internal_info.padded_width = bds_width_pad;
        cfg_iter->internal_info.format =
                        css_pipe->queue[IPU3_CSS_QUEUE_OUT].css_fmt->frame_format;
        cfg_iter->internal_info.raw_bit_depth =
                        css_pipe->queue[IPU3_CSS_QUEUE_OUT].css_fmt->bit_depth;
        cfg_iter->internal_info.raw_bayer_order =
                        css_pipe->queue[IPU3_CSS_QUEUE_OUT].css_fmt->bayer_order;
        cfg_iter->internal_info.raw_type = IMGU_ABI_RAW_TYPE_BAYER;

        cfg_iter->output_info.res.width =
                                css_pipe->queue[IPU3_CSS_QUEUE_OUT].fmt.mpix.width;
        cfg_iter->output_info.res.height =
                                css_pipe->queue[IPU3_CSS_QUEUE_OUT].fmt.mpix.height;
        cfg_iter->output_info.padded_width =
                                css_pipe->queue[IPU3_CSS_QUEUE_OUT].width_pad;
        cfg_iter->output_info.format =
                        css_pipe->queue[IPU3_CSS_QUEUE_OUT].css_fmt->frame_format;
        cfg_iter->output_info.raw_bit_depth =
                        css_pipe->queue[IPU3_CSS_QUEUE_OUT].css_fmt->bit_depth;
        cfg_iter->output_info.raw_bayer_order =
                        css_pipe->queue[IPU3_CSS_QUEUE_OUT].css_fmt->bayer_order;
        cfg_iter->output_info.raw_type = IMGU_ABI_RAW_TYPE_BAYER;

        cfg_iter->vf_info.res.width =
                        css_pipe->queue[IPU3_CSS_QUEUE_VF].fmt.mpix.width;
        cfg_iter->vf_info.res.height =
                        css_pipe->queue[IPU3_CSS_QUEUE_VF].fmt.mpix.height;
        cfg_iter->vf_info.padded_width =
                        css_pipe->queue[IPU3_CSS_QUEUE_VF].width_pad;
        cfg_iter->vf_info.format =
                        css_pipe->queue[IPU3_CSS_QUEUE_VF].css_fmt->frame_format;
        cfg_iter->vf_info.raw_bit_depth =
                        css_pipe->queue[IPU3_CSS_QUEUE_VF].css_fmt->bit_depth;
        cfg_iter->vf_info.raw_bayer_order =
                        css_pipe->queue[IPU3_CSS_QUEUE_VF].css_fmt->bayer_order;
        cfg_iter->vf_info.raw_type = IMGU_ABI_RAW_TYPE_BAYER;

        cfg_iter->dvs_envelope.width = css_pipe->rect[IPU3_CSS_RECT_ENVELOPE].width;
        cfg_iter->dvs_envelope.height =
                                css_pipe->rect[IPU3_CSS_RECT_ENVELOPE].height;

        /* Configure reference (delay) frames */

        cfg_ref = imgu_css_fw_pipeline_params(css, pipe, cfg, m0,
                                              &cofs->dmem.ref,
                                              sizeof(*cfg_ref), vaddr);
        if (!cfg_ref)
                goto bad_firmware;

        cfg_ref->port_b.crop = 0;
        cfg_ref->port_b.elems = IMGU_ABI_ISP_DDR_WORD_BYTES / BYPC;
        cfg_ref->port_b.width =
                css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_REF].width;
        cfg_ref->port_b.stride =
                css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_REF].bytesperline;
        cfg_ref->width_a_over_b =
                                IPU3_UAPI_ISP_VEC_ELEMS / cfg_ref->port_b.elems;
        cfg_ref->dvs_frame_delay = IPU3_CSS_AUX_FRAMES - 1;
        for (i = 0; i < IPU3_CSS_AUX_FRAMES; i++) {
                cfg_ref->ref_frame_addr_y[i] =
                        css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_REF].mem[i].daddr;
                cfg_ref->ref_frame_addr_c[i] =
                        css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_REF].mem[i].daddr +
                        css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_REF].bytesperline *
                        css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_REF].height;
        }
        for (; i < IMGU_ABI_FRAMES_REF; i++) {
                cfg_ref->ref_frame_addr_y[i] = 0;
                cfg_ref->ref_frame_addr_c[i] = 0;
        }

        /* Configure DVS (digital video stabilization) */

        cfg_dvs = imgu_css_fw_pipeline_params(css, pipe, cfg, m0,
                                              &cofs->dmem.dvs, sizeof(*cfg_dvs),
                                              vaddr);
        if (!cfg_dvs)
                goto bad_firmware;

        cfg_dvs->num_horizontal_blocks =
                        ALIGN(DIV_ROUND_UP(css_pipe->rect[IPU3_CSS_RECT_GDC].width,
                                           IMGU_DVS_BLOCK_W), 2);
        cfg_dvs->num_vertical_blocks =
                        DIV_ROUND_UP(css_pipe->rect[IPU3_CSS_RECT_GDC].height,
                                     IMGU_DVS_BLOCK_H);

        /* Configure TNR (temporal noise reduction) */

        if (css_pipe->pipe_id == IPU3_CSS_PIPE_ID_VIDEO) {
                cfg_tnr = imgu_css_fw_pipeline_params(css, pipe, cfg, m0,
                                                      &cofs->dmem.tnr3,
                                                      sizeof(*cfg_tnr),
                                                      vaddr);
                if (!cfg_tnr)
                        goto bad_firmware;

                cfg_tnr->port_b.crop = 0;
                cfg_tnr->port_b.elems = IMGU_ABI_ISP_DDR_WORD_BYTES;
                cfg_tnr->port_b.width =
                        css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_TNR].width;
                cfg_tnr->port_b.stride =
                        css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_TNR].bytesperline;
                cfg_tnr->width_a_over_b =
                        IPU3_UAPI_ISP_VEC_ELEMS / cfg_tnr->port_b.elems;
                cfg_tnr->frame_height =
                        css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_TNR].height;
                cfg_tnr->delay_frame = IPU3_CSS_AUX_FRAMES - 1;
                for (i = 0; i < IPU3_CSS_AUX_FRAMES; i++)
                        cfg_tnr->frame_addr[i] =
                                css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_TNR]
                                        .mem[i].daddr;
                for (; i < IMGU_ABI_FRAMES_TNR; i++)
                        cfg_tnr->frame_addr[i] = 0;
        }

        /* Configure ref dmem state parameters */

        cfg = IMGU_ABI_PARAM_CLASS_STATE;
        vaddr = css_pipe->binary_params_cs[cfg - 1][m0].vaddr;

        cfg_ref_state = imgu_css_fw_pipeline_params(css, pipe, cfg, m0,
                                                    &sofs->dmem.ref,
                                                    sizeof(*cfg_ref_state),
                                                    vaddr);
        if (!cfg_ref_state)
                goto bad_firmware;

        cfg_ref_state->ref_in_buf_idx = 0;
        cfg_ref_state->ref_out_buf_idx = 1;

        /* Configure tnr dmem state parameters */
        if (css_pipe->pipe_id == IPU3_CSS_PIPE_ID_VIDEO) {
                cfg_tnr_state =
                        imgu_css_fw_pipeline_params(css, pipe, cfg, m0,
                                                    &sofs->dmem.tnr3,
                                                    sizeof(*cfg_tnr_state),
                                                    vaddr);
                if (!cfg_tnr_state)
                        goto bad_firmware;

                cfg_tnr_state->in_bufidx = 0;
                cfg_tnr_state->out_bufidx = 1;
                cfg_tnr_state->bypass_filter = 0;
                cfg_tnr_state->total_frame_counter = 0;
                for (i = 0; i < IMGU_ABI_BUF_SETS_TNR; i++)
                        cfg_tnr_state->buffer_frame_counter[i] = 0;
        }

        /* Configure ISP stage */

        isp_stage = css_pipe->xmem_isp_stage_ptrs[pipe][stage].vaddr;
        memset(isp_stage, 0, sizeof(*isp_stage));
        isp_stage->blob_info = bi->blob;
        isp_stage->binary_info = bi->info.isp.sp;
        strscpy(isp_stage->binary_name,
                (char *)css->fwp + bi->blob.prog_name_offset,
                sizeof(isp_stage->binary_name));
        isp_stage->mem_initializers = bi->info.isp.sp.mem_initializers;
        for (i = IMGU_ABI_PARAM_CLASS_CONFIG; i < IMGU_ABI_PARAM_CLASS_NUM; i++)
                for (j = 0; j < IMGU_ABI_NUM_MEMORIES; j++)
                        isp_stage->mem_initializers.params[i][j].address =
                                        css_pipe->binary_params_cs[i - 1][j].daddr;

        /* Configure SP stage */

        sp_stage = css_pipe->xmem_sp_stage_ptrs[pipe][stage].vaddr;
        memset(sp_stage, 0, sizeof(*sp_stage));

        sp_stage->frames.in.buf_attr = buffer_sp_init;
        for (i = 0; i < IMGU_ABI_BINARY_MAX_OUTPUT_PORTS; i++)
                sp_stage->frames.out[i].buf_attr = buffer_sp_init;
        sp_stage->frames.out_vf.buf_attr = buffer_sp_init;
        sp_stage->frames.s3a_buf = buffer_sp_init;
        sp_stage->frames.dvs_buf = buffer_sp_init;

        sp_stage->stage_type = IMGU_ABI_STAGE_TYPE_ISP;
        sp_stage->num = stage;
        sp_stage->isp_online = 0;
        sp_stage->isp_copy_vf = 0;
        sp_stage->isp_copy_output = 0;

        sp_stage->enable.vf_output = css_pipe->vf_output_en;

        sp_stage->frames.effective_in_res.width =
                                css_pipe->rect[IPU3_CSS_RECT_EFFECTIVE].width;
        sp_stage->frames.effective_in_res.height =
                                css_pipe->rect[IPU3_CSS_RECT_EFFECTIVE].height;
        sp_stage->frames.in.info.res.width =
                                css_pipe->queue[IPU3_CSS_QUEUE_IN].fmt.mpix.width;
        sp_stage->frames.in.info.res.height =
                                css_pipe->queue[IPU3_CSS_QUEUE_IN].fmt.mpix.height;
        sp_stage->frames.in.info.padded_width =
                                        css_pipe->queue[IPU3_CSS_QUEUE_IN].width_pad;
        sp_stage->frames.in.info.format =
                        css_pipe->queue[IPU3_CSS_QUEUE_IN].css_fmt->frame_format;
        sp_stage->frames.in.info.raw_bit_depth =
                        css_pipe->queue[IPU3_CSS_QUEUE_IN].css_fmt->bit_depth;
        sp_stage->frames.in.info.raw_bayer_order =
                        css_pipe->queue[IPU3_CSS_QUEUE_IN].css_fmt->bayer_order;
        sp_stage->frames.in.info.raw_type = IMGU_ABI_RAW_TYPE_BAYER;
        sp_stage->frames.in.buf_attr.buf_src.queue_id = IMGU_ABI_QUEUE_C_ID;
        sp_stage->frames.in.buf_attr.buf_type =
                                        IMGU_ABI_BUFFER_TYPE_INPUT_FRAME;

        sp_stage->frames.out[0].info.res.width =
                                css_pipe->queue[IPU3_CSS_QUEUE_OUT].fmt.mpix.width;
        sp_stage->frames.out[0].info.res.height =
                                css_pipe->queue[IPU3_CSS_QUEUE_OUT].fmt.mpix.height;
        sp_stage->frames.out[0].info.padded_width =
                                css_pipe->queue[IPU3_CSS_QUEUE_OUT].width_pad;
        sp_stage->frames.out[0].info.format =
                        css_pipe->queue[IPU3_CSS_QUEUE_OUT].css_fmt->frame_format;
        sp_stage->frames.out[0].info.raw_bit_depth =
                        css_pipe->queue[IPU3_CSS_QUEUE_OUT].css_fmt->bit_depth;
        sp_stage->frames.out[0].info.raw_bayer_order =
                        css_pipe->queue[IPU3_CSS_QUEUE_OUT].css_fmt->bayer_order;
        sp_stage->frames.out[0].info.raw_type = IMGU_ABI_RAW_TYPE_BAYER;
        sp_stage->frames.out[0].planes.nv.uv.offset =
                                css_pipe->queue[IPU3_CSS_QUEUE_OUT].width_pad *
                                css_pipe->queue[IPU3_CSS_QUEUE_OUT].fmt.mpix.height;
        sp_stage->frames.out[0].buf_attr.buf_src.queue_id = IMGU_ABI_QUEUE_D_ID;
        sp_stage->frames.out[0].buf_attr.buf_type =
                                        IMGU_ABI_BUFFER_TYPE_OUTPUT_FRAME;

        sp_stage->frames.out[1].buf_attr.buf_src.queue_id =
                                                        IMGU_ABI_QUEUE_EVENT_ID;

        sp_stage->frames.internal_frame_info.res.width =
                                        css_pipe->rect[IPU3_CSS_RECT_BDS].width;
        sp_stage->frames.internal_frame_info.res.height =
                                        css_pipe->rect[IPU3_CSS_RECT_BDS].height;
        sp_stage->frames.internal_frame_info.padded_width = bds_width_pad;

        sp_stage->frames.internal_frame_info.format =
                        css_pipe->queue[IPU3_CSS_QUEUE_OUT].css_fmt->frame_format;
        sp_stage->frames.internal_frame_info.raw_bit_depth =
                        css_pipe->queue[IPU3_CSS_QUEUE_OUT].css_fmt->bit_depth;
        sp_stage->frames.internal_frame_info.raw_bayer_order =
                        css_pipe->queue[IPU3_CSS_QUEUE_OUT].css_fmt->bayer_order;
        sp_stage->frames.internal_frame_info.raw_type = IMGU_ABI_RAW_TYPE_BAYER;

        sp_stage->frames.out_vf.info.res.width =
                                css_pipe->queue[IPU3_CSS_QUEUE_VF].fmt.mpix.width;
        sp_stage->frames.out_vf.info.res.height =
                                css_pipe->queue[IPU3_CSS_QUEUE_VF].fmt.mpix.height;
        sp_stage->frames.out_vf.info.padded_width =
                                        css_pipe->queue[IPU3_CSS_QUEUE_VF].width_pad;
        sp_stage->frames.out_vf.info.format =
                        css_pipe->queue[IPU3_CSS_QUEUE_VF].css_fmt->frame_format;
        sp_stage->frames.out_vf.info.raw_bit_depth =

                        css_pipe->queue[IPU3_CSS_QUEUE_VF].css_fmt->bit_depth;
        sp_stage->frames.out_vf.info.raw_bayer_order =
                        css_pipe->queue[IPU3_CSS_QUEUE_VF].css_fmt->bayer_order;
        sp_stage->frames.out_vf.info.raw_type = IMGU_ABI_RAW_TYPE_BAYER;
        sp_stage->frames.out_vf.planes.yuv.u.offset =
                                css_pipe->queue[IPU3_CSS_QUEUE_VF].width_pad *
                                css_pipe->queue[IPU3_CSS_QUEUE_VF].fmt.mpix.height;
        sp_stage->frames.out_vf.planes.yuv.v.offset =
                        css_pipe->queue[IPU3_CSS_QUEUE_VF].width_pad *
                        css_pipe->queue[IPU3_CSS_QUEUE_VF].fmt.mpix.height * 5 / 4;
        sp_stage->frames.out_vf.buf_attr.buf_src.queue_id = IMGU_ABI_QUEUE_E_ID;
        sp_stage->frames.out_vf.buf_attr.buf_type =
                                        IMGU_ABI_BUFFER_TYPE_VF_OUTPUT_FRAME;

        sp_stage->frames.s3a_buf.buf_src.queue_id = IMGU_ABI_QUEUE_F_ID;
        sp_stage->frames.s3a_buf.buf_type = IMGU_ABI_BUFFER_TYPE_3A_STATISTICS;

        sp_stage->frames.dvs_buf.buf_src.queue_id = IMGU_ABI_QUEUE_G_ID;
        sp_stage->frames.dvs_buf.buf_type = IMGU_ABI_BUFFER_TYPE_DIS_STATISTICS;

        sp_stage->dvs_envelope.width = css_pipe->rect[IPU3_CSS_RECT_ENVELOPE].width;
        sp_stage->dvs_envelope.height =
                                css_pipe->rect[IPU3_CSS_RECT_ENVELOPE].height;

        sp_stage->isp_pipe_version =
                                bi->info.isp.sp.pipeline.isp_pipe_version;
        sp_stage->isp_deci_log_factor =
                        clamp(max(fls(css_pipe->rect[IPU3_CSS_RECT_BDS].width /
                                      IMGU_MAX_BQ_GRID_WIDTH),
                                  fls(css_pipe->rect[IPU3_CSS_RECT_BDS].height /
                                      IMGU_MAX_BQ_GRID_HEIGHT)) - 1, 3, 5);
        sp_stage->isp_vf_downscale_bits = 0;
        sp_stage->if_config_index = 255;
        sp_stage->sp_enable_xnr = 0;
        sp_stage->num_stripes = stripes;
        sp_stage->enable.s3a = 1;
        sp_stage->enable.dvs_stats = 0;

        sp_stage->xmem_bin_addr = css->binary[css_pipe->bindex].daddr;
        sp_stage->xmem_map_addr = css_pipe->sp_ddr_ptrs.daddr;
        sp_stage->isp_stage_addr =
                css_pipe->xmem_isp_stage_ptrs[pipe][stage].daddr;

        /* Configure SP group */

        sp_group = css->xmem_sp_group_ptrs.vaddr;
        memset(&sp_group->pipe[pipe], 0, sizeof(struct imgu_abi_sp_pipeline));

        sp_group->pipe[pipe].num_stages = 1;
        sp_group->pipe[pipe].pipe_id = css_pipe->pipe_id;
        sp_group->pipe[pipe].thread_id = pipe;
        sp_group->pipe[pipe].pipe_num = pipe;
        sp_group->pipe[pipe].num_execs = -1;
        sp_group->pipe[pipe].pipe_qos_config = -1;
        sp_group->pipe[pipe].required_bds_factor = 0;
        sp_group->pipe[pipe].dvs_frame_delay = IPU3_CSS_AUX_FRAMES - 1;
        sp_group->pipe[pipe].inout_port_config =
                                        IMGU_ABI_PORT_CONFIG_TYPE_INPUT_HOST |
                                        IMGU_ABI_PORT_CONFIG_TYPE_OUTPUT_HOST;
        sp_group->pipe[pipe].scaler_pp_lut = 0;
        sp_group->pipe[pipe].shading.internal_frame_origin_x_bqs_on_sctbl = 0;
        sp_group->pipe[pipe].shading.internal_frame_origin_y_bqs_on_sctbl = 0;
        sp_group->pipe[pipe].sp_stage_addr[stage] =
                        css_pipe->xmem_sp_stage_ptrs[pipe][stage].daddr;
        sp_group->pipe[pipe].pipe_config =
                        bi->info.isp.sp.enable.params ? (1 << pipe) : 0;
        sp_group->pipe[pipe].pipe_config |= IMGU_ABI_PIPE_CONFIG_ACQUIRE_ISP;

        /* Initialize parameter pools */

        if (imgu_css_pool_init(imgu, &css_pipe->pool.parameter_set_info,
                               sizeof(struct imgu_abi_parameter_set_info)) ||
            imgu_css_pool_init(imgu, &css_pipe->pool.acc,
                               sizeof(struct imgu_abi_acc_param)) ||
            imgu_css_pool_init(imgu, &css_pipe->pool.gdc,
                               sizeof(struct imgu_abi_gdc_warp_param) *
                               3 * cfg_dvs->num_horizontal_blocks / 2 *
                               cfg_dvs->num_vertical_blocks) ||
            imgu_css_pool_init(imgu, &css_pipe->pool.obgrid,
                               imgu_css_fw_obgrid_size(
                               &css->fwp->binary_header[css_pipe->bindex])))
                goto out_of_memory;

        for (i = 0; i < IMGU_ABI_NUM_MEMORIES; i++)
                if (imgu_css_pool_init(imgu,
                                       &css_pipe->pool.binary_params_p[i],
                                       bi->info.isp.sp.mem_initializers.params
                                       [IMGU_ABI_PARAM_CLASS_PARAM][i].size))
                        goto out_of_memory;

        return 0;

bad_firmware:
        imgu_css_pipeline_cleanup(css, pipe);
        return -EPROTO;

out_of_memory:
        imgu_css_pipeline_cleanup(css, pipe);
        return -ENOMEM;
}

static u8 imgu_css_queue_pos(struct imgu_css *css, int queue, int thread)
{
        static const unsigned int sp;
        void __iomem *const base = css->base;
        struct imgu_fw_info *bi = &css->fwp->binary_header[css->fw_sp[sp]];
        struct imgu_abi_queues __iomem *q = base + IMGU_REG_SP_DMEM_BASE(sp) +
                                                bi->info.sp.host_sp_queue;

        return queue >= 0 ? readb(&q->host2sp_bufq_info[thread][queue].end) :
                            readb(&q->host2sp_evtq_info.end);
}

/* Sent data to sp using given buffer queue, or if queue < 0, event queue. */
static int imgu_css_queue_data(struct imgu_css *css,
                               int queue, int thread, u32 data)
{
        static const unsigned int sp;
        void __iomem *const base = css->base;
        struct imgu_fw_info *bi = &css->fwp->binary_header[css->fw_sp[sp]];
        struct imgu_abi_queues __iomem *q = base + IMGU_REG_SP_DMEM_BASE(sp) +
                                                bi->info.sp.host_sp_queue;
        u8 size, start, end, end2;

        if (queue >= 0) {
                size = readb(&q->host2sp_bufq_info[thread][queue].size);
                start = readb(&q->host2sp_bufq_info[thread][queue].start);
                end = readb(&q->host2sp_bufq_info[thread][queue].end);
        } else {
                size = readb(&q->host2sp_evtq_info.size);
                start = readb(&q->host2sp_evtq_info.start);
                end = readb(&q->host2sp_evtq_info.end);
        }

        if (size == 0)
                return -EIO;

        end2 = (end + 1) % size;
        if (end2 == start)
                return -EBUSY;  /* Queue full */

        if (queue >= 0) {
                writel(data, &q->host2sp_bufq[thread][queue][end]);
                writeb(end2, &q->host2sp_bufq_info[thread][queue].end);
        } else {
                writel(data, &q->host2sp_evtq[end]);
                writeb(end2, &q->host2sp_evtq_info.end);
        }

        return 0;
}

/* Receive data using given buffer queue, or if queue < 0, event queue. */
static int imgu_css_dequeue_data(struct imgu_css *css, int queue, u32 *data)
{
        static const unsigned int sp;
        void __iomem *const base = css->base;
        struct imgu_fw_info *bi = &css->fwp->binary_header[css->fw_sp[sp]];
        struct imgu_abi_queues __iomem *q = base + IMGU_REG_SP_DMEM_BASE(sp) +
                                                bi->info.sp.host_sp_queue;
        u8 size, start, end, start2;

        if (queue >= 0) {
                size = readb(&q->sp2host_bufq_info[queue].size);
                start = readb(&q->sp2host_bufq_info[queue].start);
                end = readb(&q->sp2host_bufq_info[queue].end);
        } else {
                size = readb(&q->sp2host_evtq_info.size);
                start = readb(&q->sp2host_evtq_info.start);
                end = readb(&q->sp2host_evtq_info.end);
        }

        if (size == 0)
                return -EIO;

        if (end == start)
                return -EBUSY;  /* Queue empty */

        start2 = (start + 1) % size;

        if (queue >= 0) {
                *data = readl(&q->sp2host_bufq[queue][start]);
                writeb(start2, &q->sp2host_bufq_info[queue].start);
        } else {
                int r;

                *data = readl(&q->sp2host_evtq[start]);
                writeb(start2, &q->sp2host_evtq_info.start);

                /* Acknowledge events dequeued from event queue */
                r = imgu_css_queue_data(css, queue, 0,
                                        IMGU_ABI_EVENT_EVENT_DEQUEUED);
                if (r < 0)
                        return r;
        }

        return 0;
}

/* Free binary-specific resources */
static void imgu_css_binary_cleanup(struct imgu_css *css, unsigned int pipe)
{
        struct imgu_device *imgu = dev_get_drvdata(css->dev);
        unsigned int i, j;

        struct imgu_css_pipe *css_pipe = &css->pipes[pipe];

        for (j = 0; j < IMGU_ABI_PARAM_CLASS_NUM - 1; j++)
                for (i = 0; i < IMGU_ABI_NUM_MEMORIES; i++)
                        imgu_dmamap_free(imgu,
                                         &css_pipe->binary_params_cs[j][i]);

        j = IPU3_CSS_AUX_FRAME_REF;
        for (i = 0; i < IPU3_CSS_AUX_FRAMES; i++)
                imgu_dmamap_free(imgu,
                                 &css_pipe->aux_frames[j].mem[i]);

        j = IPU3_CSS_AUX_FRAME_TNR;
        for (i = 0; i < IPU3_CSS_AUX_FRAMES; i++)
                imgu_dmamap_free(imgu,
                                 &css_pipe->aux_frames[j].mem[i]);
}

static int imgu_css_binary_preallocate(struct imgu_css *css, unsigned int pipe)
{
        struct imgu_device *imgu = dev_get_drvdata(css->dev);
        unsigned int i, j;

        struct imgu_css_pipe *css_pipe = &css->pipes[pipe];

        for (j = IMGU_ABI_PARAM_CLASS_CONFIG;
             j < IMGU_ABI_PARAM_CLASS_NUM; j++)
                for (i = 0; i < IMGU_ABI_NUM_MEMORIES; i++)
                        if (!imgu_dmamap_alloc(imgu,
                                               &css_pipe->binary_params_cs[j - 1][i],
                                               CSS_ABI_SIZE))
                                goto out_of_memory;

        for (i = 0; i < IPU3_CSS_AUX_FRAMES; i++)
                if (!imgu_dmamap_alloc(imgu,
                                       &css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_REF].
                                       mem[i], CSS_BDS_SIZE))
                        goto out_of_memory;

        for (i = 0; i < IPU3_CSS_AUX_FRAMES; i++)
                if (!imgu_dmamap_alloc(imgu,
                                       &css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_TNR].
                                       mem[i], CSS_GDC_SIZE))
                        goto out_of_memory;

        return 0;

out_of_memory:
        imgu_css_binary_cleanup(css, pipe);
        return -ENOMEM;
}

/* allocate binary-specific resources */
static int imgu_css_binary_setup(struct imgu_css *css, unsigned int pipe)
{
        struct imgu_css_pipe *css_pipe = &css->pipes[pipe];
        struct imgu_fw_info *bi = &css->fwp->binary_header[css_pipe->bindex];
        struct imgu_device *imgu = dev_get_drvdata(css->dev);
        int i, j, size;
        static const int BYPC = 2;      /* Bytes per component */
        unsigned int w, h;

        /* Allocate parameter memory blocks for this binary */

        for (j = IMGU_ABI_PARAM_CLASS_CONFIG; j < IMGU_ABI_PARAM_CLASS_NUM; j++)
                for (i = 0; i < IMGU_ABI_NUM_MEMORIES; i++) {
                        if (imgu_css_dma_buffer_resize(
                            imgu,
                            &css_pipe->binary_params_cs[j - 1][i],
                            bi->info.isp.sp.mem_initializers.params[j][i].size))
                                goto out_of_memory;
                }

        /* Allocate internal frame buffers */

        /* Reference frames for DVS, FRAME_FORMAT_YUV420_16 */
        css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_REF].bytesperpixel = BYPC;
        css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_REF].width =
                                        css_pipe->rect[IPU3_CSS_RECT_BDS].width;
        css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_REF].height =
                                ALIGN(css_pipe->rect[IPU3_CSS_RECT_BDS].height,
                                      IMGU_DVS_BLOCK_H) + 2 * IMGU_GDC_BUF_Y;
        h = css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_REF].height;
        w = ALIGN(css_pipe->rect[IPU3_CSS_RECT_BDS].width,
                  2 * IPU3_UAPI_ISP_VEC_ELEMS) + 2 * IMGU_GDC_BUF_X;
        css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_REF].bytesperline =
                css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_REF].bytesperpixel * w;
        size = w * h * BYPC + (w / 2) * (h / 2) * BYPC * 2;
        for (i = 0; i < IPU3_CSS_AUX_FRAMES; i++)
                if (imgu_css_dma_buffer_resize(
                        imgu,
                        &css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_REF].mem[i],
                        size))
                        goto out_of_memory;

        /* TNR frames for temporal noise reduction, FRAME_FORMAT_YUV_LINE */
        css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_TNR].bytesperpixel = 1;
        css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_TNR].width =
                        roundup(css_pipe->rect[IPU3_CSS_RECT_GDC].width,
                                bi->info.isp.sp.block.block_width *
                                IPU3_UAPI_ISP_VEC_ELEMS);
        css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_TNR].height =
                        roundup(css_pipe->rect[IPU3_CSS_RECT_GDC].height,
                                bi->info.isp.sp.block.output_block_height);

        w = css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_TNR].width;
        css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_TNR].bytesperline = w;
        h = css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_TNR].height;
        size = w * ALIGN(h * 3 / 2 + 3, 2);     /* +3 for vf_pp prefetch */
        for (i = 0; i < IPU3_CSS_AUX_FRAMES; i++)
                if (imgu_css_dma_buffer_resize(
                        imgu,
                        &css_pipe->aux_frames[IPU3_CSS_AUX_FRAME_TNR].mem[i],
                        size))
                        goto out_of_memory;

        return 0;

out_of_memory:
        imgu_css_binary_cleanup(css, pipe);
        return -ENOMEM;
}

int imgu_css_start_streaming(struct imgu_css *css)
{
        u32 data;
        int r, pipe;

        if (css->streaming)
                return -EPROTO;

        for_each_set_bit(pipe, css->enabled_pipes, IMGU_MAX_PIPE_NUM) {
                r = imgu_css_binary_setup(css, pipe);
                if (r < 0)
                        return r;
        }

        r = imgu_css_hw_init(css);
        if (r < 0)
                return r;

        r = imgu_css_hw_start(css);
        if (r < 0)
                goto fail;

        for_each_set_bit(pipe, css->enabled_pipes, IMGU_MAX_PIPE_NUM) {
                r = imgu_css_pipeline_init(css, pipe);
                if (r < 0)
                        goto fail;
        }

        css->streaming = true;

        imgu_css_hw_enable_irq(css);

        /* Initialize parameters to default */
        for_each_set_bit(pipe, css->enabled_pipes, IMGU_MAX_PIPE_NUM) {
                r = imgu_css_set_parameters(css, pipe, NULL);
                if (r < 0)
                        goto fail;
        }

        while (!(r = imgu_css_dequeue_data(css, IMGU_ABI_QUEUE_A_ID, &data)))
                ;
        if (r != -EBUSY)
                goto fail;

        while (!(r = imgu_css_dequeue_data(css, IMGU_ABI_QUEUE_B_ID, &data)))
                ;
        if (r != -EBUSY)
                goto fail;

        for_each_set_bit(pipe, css->enabled_pipes, IMGU_MAX_PIPE_NUM) {
                r = imgu_css_queue_data(css, IMGU_ABI_QUEUE_EVENT_ID, pipe,
                                        IMGU_ABI_EVENT_START_STREAM |
                                        pipe << 16);
                if (r < 0)
                        goto fail;
        }

        return 0;

fail:
        css->streaming = false;
        imgu_css_hw_cleanup(css);
        for_each_set_bit(pipe, css->enabled_pipes, IMGU_MAX_PIPE_NUM) {
                imgu_css_pipeline_cleanup(css, pipe);
                imgu_css_binary_cleanup(css, pipe);
        }

        return r;
}

void imgu_css_stop_streaming(struct imgu_css *css)
{
        struct imgu_css_buffer *b, *b0;
        int q, r, pipe;

        for_each_set_bit(pipe, css->enabled_pipes, IMGU_MAX_PIPE_NUM) {
                r = imgu_css_queue_data(css, IMGU_ABI_QUEUE_EVENT_ID, pipe,
                                        IMGU_ABI_EVENT_STOP_STREAM);
                if (r < 0)
                        dev_warn(css->dev, "failed on stop stream event\n");
        }

        if (!css->streaming)
                return;

        imgu_css_hw_stop(css);

        imgu_css_hw_cleanup(css);

        for_each_set_bit(pipe, css->enabled_pipes, IMGU_MAX_PIPE_NUM) {
                struct imgu_css_pipe *css_pipe = &css->pipes[pipe];

                imgu_css_pipeline_cleanup(css, pipe);

                spin_lock(&css_pipe->qlock);
                for (q = 0; q < IPU3_CSS_QUEUES; q++)
                        list_for_each_entry_safe(b, b0,
                                                 &css_pipe->queue[q].bufs,
                                                 list) {
                                b->state = IPU3_CSS_BUFFER_FAILED;
                                list_del(&b->list);
                        }
                spin_unlock(&css_pipe->qlock);
        }

        css->streaming = false;
}

bool imgu_css_pipe_queue_empty(struct imgu_css *css, unsigned int pipe)
{
        int q;
        struct imgu_css_pipe *css_pipe = &css->pipes[pipe];

        spin_lock(&css_pipe->qlock);
        for (q = 0; q < IPU3_CSS_QUEUES; q++)
                if (!list_empty(&css_pipe->queue[q].bufs))
                        break;
        spin_unlock(&css_pipe->qlock);
        return (q == IPU3_CSS_QUEUES);
}

bool imgu_css_queue_empty(struct imgu_css *css)
{
        unsigned int pipe;
        bool ret = false;

        for (pipe = 0; pipe < IMGU_MAX_PIPE_NUM; pipe++)
                ret &= imgu_css_pipe_queue_empty(css, pipe);

        return ret;
}

bool imgu_css_is_streaming(struct imgu_css *css)
{
        return css->streaming;
}

static int imgu_css_map_init(struct imgu_css *css, unsigned int pipe)
{
        struct imgu_device *imgu = dev_get_drvdata(css->dev);
        struct imgu_css_pipe *css_pipe = &css->pipes[pipe];
        unsigned int p, q, i;

        /* Allocate and map common structures with imgu hardware */
        for (p = 0; p < IPU3_CSS_PIPE_ID_NUM; p++)
                for (i = 0; i < IMGU_ABI_MAX_STAGES; i++) {
                        if (!imgu_dmamap_alloc(imgu,
                                               &css_pipe->
                                               xmem_sp_stage_ptrs[p][i],
                                               sizeof(struct imgu_abi_sp_stage)))
                                return -ENOMEM;
                        if (!imgu_dmamap_alloc(imgu,
                                               &css_pipe->
                                               xmem_isp_stage_ptrs[p][i],
                                               sizeof(struct imgu_abi_isp_stage)))
                                return -ENOMEM;
                }

        if (!imgu_dmamap_alloc(imgu, &css_pipe->sp_ddr_ptrs,
                               ALIGN(sizeof(struct imgu_abi_ddr_address_map),
                                     IMGU_ABI_ISP_DDR_WORD_BYTES)))
                return -ENOMEM;

        for (q = 0; q < IPU3_CSS_QUEUES; q++) {
                unsigned int abi_buf_num = ARRAY_SIZE(css_pipe->abi_buffers[q]);

                for (i = 0; i < abi_buf_num; i++)
                        if (!imgu_dmamap_alloc(imgu,
                                               &css_pipe->abi_buffers[q][i],
                                               sizeof(struct imgu_abi_buffer)))
                                return -ENOMEM;
        }

        if (imgu_css_binary_preallocate(css, pipe)) {
                imgu_css_binary_cleanup(css, pipe);
                return -ENOMEM;
        }

        return 0;
}

static void imgu_css_pipe_cleanup(struct imgu_css *css, unsigned int pipe)
{
        struct imgu_device *imgu = dev_get_drvdata(css->dev);
        struct imgu_css_pipe *css_pipe = &css->pipes[pipe];
        unsigned int p, q, i, abi_buf_num;

        imgu_css_binary_cleanup(css, pipe);

        for (q = 0; q < IPU3_CSS_QUEUES; q++) {
                abi_buf_num = ARRAY_SIZE(css_pipe->abi_buffers[q]);
                for (i = 0; i < abi_buf_num; i++)
                        imgu_dmamap_free(imgu, &css_pipe->abi_buffers[q][i]);
        }

        for (p = 0; p < IPU3_CSS_PIPE_ID_NUM; p++)
                for (i = 0; i < IMGU_ABI_MAX_STAGES; i++) {
                        imgu_dmamap_free(imgu,
                                         &css_pipe->xmem_sp_stage_ptrs[p][i]);
                        imgu_dmamap_free(imgu,
                                         &css_pipe->xmem_isp_stage_ptrs[p][i]);
                }

        imgu_dmamap_free(imgu, &css_pipe->sp_ddr_ptrs);
}

void imgu_css_cleanup(struct imgu_css *css)
{
        struct imgu_device *imgu = dev_get_drvdata(css->dev);
        unsigned int pipe;

        imgu_css_stop_streaming(css);
        for (pipe = 0; pipe < IMGU_MAX_PIPE_NUM; pipe++)
                imgu_css_pipe_cleanup(css, pipe);
        imgu_dmamap_free(imgu, &css->xmem_sp_group_ptrs);
        imgu_css_fw_cleanup(css);
}

int imgu_css_init(struct device *dev, struct imgu_css *css,
                  void __iomem *base, int length)
{
        struct imgu_device *imgu = dev_get_drvdata(dev);
        int r, q, pipe;

        /* Initialize main data structure */
        css->dev = dev;
        css->base = base;
        css->iomem_length = length;

        for (pipe = 0; pipe < IMGU_MAX_PIPE_NUM; pipe++) {
                struct imgu_css_pipe *css_pipe = &css->pipes[pipe];

                css_pipe->vf_output_en = false;
                spin_lock_init(&css_pipe->qlock);
                css_pipe->bindex = IPU3_CSS_DEFAULT_BINARY;
                css_pipe->pipe_id = IPU3_CSS_PIPE_ID_VIDEO;
                for (q = 0; q < IPU3_CSS_QUEUES; q++) {
                        r = imgu_css_queue_init(&css_pipe->queue[q], NULL, 0);
                        if (r)
                                return r;
                }
                r = imgu_css_map_init(css, pipe);
                if (r) {
                        imgu_css_cleanup(css);
                        return r;
                }
        }
        if (!imgu_dmamap_alloc(imgu, &css->xmem_sp_group_ptrs,
                               sizeof(struct imgu_abi_sp_group)))
                return -ENOMEM;

        r = imgu_css_fw_init(css);
        if (r)
                return r;

        return 0;
}

static u32 imgu_css_adjust(u32 res, u32 align)
{
        u32 val = max_t(u32, IPU3_CSS_MIN_RES, res);

        return DIV_ROUND_CLOSEST(val, align) * align;
}

/* Select a binary matching the required resolutions and formats */
static int imgu_css_find_binary(struct imgu_css *css,
                                unsigned int pipe,
                                struct imgu_css_queue queue[IPU3_CSS_QUEUES],
                                struct v4l2_rect rects[IPU3_CSS_RECTS])
{
        const int binary_nr = css->fwp->file_header.binary_nr;
        unsigned int binary_mode =
                (css->pipes[pipe].pipe_id == IPU3_CSS_PIPE_ID_CAPTURE) ?
                IA_CSS_BINARY_MODE_PRIMARY : IA_CSS_BINARY_MODE_VIDEO;
        const struct v4l2_pix_format_mplane *in =
                                        &queue[IPU3_CSS_QUEUE_IN].fmt.mpix;
        const struct v4l2_pix_format_mplane *out =
                                        &queue[IPU3_CSS_QUEUE_OUT].fmt.mpix;
        const struct v4l2_pix_format_mplane *vf =
                                        &queue[IPU3_CSS_QUEUE_VF].fmt.mpix;
        u32 stripe_w = 0, stripe_h = 0;
        const char *name;
        int i, j;

        if (!imgu_css_queue_enabled(&queue[IPU3_CSS_QUEUE_IN]))
                return -EINVAL;

        /* Find out the strip size boundary */
        for (i = 0; i < binary_nr; i++) {
                struct imgu_fw_info *bi = &css->fwp->binary_header[i];

                u32 max_width = bi->info.isp.sp.output.max_width;
                u32 max_height = bi->info.isp.sp.output.max_height;

                if (bi->info.isp.sp.iterator.num_stripes <= 1) {
                        stripe_w = stripe_w ?
                                min(stripe_w, max_width) : max_width;
                        stripe_h = stripe_h ?
                                min(stripe_h, max_height) : max_height;
                }
        }

        for (i = 0; i < binary_nr; i++) {
                struct imgu_fw_info *bi = &css->fwp->binary_header[i];
                enum imgu_abi_frame_format q_fmt;

                name = (void *)css->fwp + bi->blob.prog_name_offset;

                /* Check that binary supports memory-to-memory processing */
                if (bi->info.isp.sp.input.source !=
                    IMGU_ABI_BINARY_INPUT_SOURCE_MEMORY)
                        continue;

                /* Check that binary supports raw10 input */
                if (!bi->info.isp.sp.enable.input_feeder &&
                    !bi->info.isp.sp.enable.input_raw)
                        continue;

                /* Check binary mode */
                if (bi->info.isp.sp.pipeline.mode != binary_mode)
                        continue;

                /* Since input is RGGB bayer, need to process colors */
                if (bi->info.isp.sp.enable.luma_only)
                        continue;

                if (in->width < bi->info.isp.sp.input.min_width ||
                    in->width > bi->info.isp.sp.input.max_width ||
                    in->height < bi->info.isp.sp.input.min_height ||
                    in->height > bi->info.isp.sp.input.max_height)
                        continue;

                if (imgu_css_queue_enabled(&queue[IPU3_CSS_QUEUE_OUT])) {
                        if (bi->info.isp.num_output_pins <= 0)
                                continue;

                        q_fmt = queue[IPU3_CSS_QUEUE_OUT].css_fmt->frame_format;
                        for (j = 0; j < bi->info.isp.num_output_formats; j++)
                                if (bi->info.isp.output_formats[j] == q_fmt)
                                        break;
                        if (j >= bi->info.isp.num_output_formats)
                                continue;

                        if (out->width < bi->info.isp.sp.output.min_width ||
                            out->width > bi->info.isp.sp.output.max_width ||
                            out->height < bi->info.isp.sp.output.min_height ||
                            out->height > bi->info.isp.sp.output.max_height)
                                continue;

                        if (out->width > bi->info.isp.sp.internal.max_width ||
                            out->height > bi->info.isp.sp.internal.max_height)
                                continue;
                }

                if (imgu_css_queue_enabled(&queue[IPU3_CSS_QUEUE_VF])) {
                        if (bi->info.isp.num_output_pins <= 1)
                                continue;

                        q_fmt = queue[IPU3_CSS_QUEUE_VF].css_fmt->frame_format;
                        for (j = 0; j < bi->info.isp.num_output_formats; j++)
                                if (bi->info.isp.output_formats[j] == q_fmt)
                                        break;
                        if (j >= bi->info.isp.num_output_formats)
                                continue;

                        if (vf->width < bi->info.isp.sp.output.min_width ||
                            vf->width > bi->info.isp.sp.output.max_width ||
                            vf->height < bi->info.isp.sp.output.min_height ||
                            vf->height > bi->info.isp.sp.output.max_height)
                                continue;
                }

                /* All checks passed, select the binary */
                dev_dbg(css->dev, "using binary %s id = %u\n", name,
                        bi->info.isp.sp.id);
                return i;
        }

        /* Can not find suitable binary for these parameters */
        return -EINVAL;
}

/*
 * Check that there is a binary matching requirements. Parameters may be
 * NULL indicating disabled input/output. Return negative if given
 * parameters can not be supported or on error, zero or positive indicating
 * found binary number. May modify the given parameters if not exact match
 * is found.
 */
int imgu_css_fmt_try(struct imgu_css *css,
                     struct v4l2_pix_format_mplane *fmts[IPU3_CSS_QUEUES],
                     struct v4l2_rect *rects[IPU3_CSS_RECTS],
                     unsigned int pipe)
{
        static const u32 EFF_ALIGN_W = 2;
        static const u32 BDS_ALIGN_W = 4;
        static const u32 OUT_ALIGN_W = 8;
        static const u32 OUT_ALIGN_H = 4;
        static const u32 VF_ALIGN_W  = 2;
        static const char *qnames[IPU3_CSS_QUEUES] = {
                [IPU3_CSS_QUEUE_IN] = "in",
                [IPU3_CSS_QUEUE_PARAMS]    = "params",
                [IPU3_CSS_QUEUE_OUT] = "out",
                [IPU3_CSS_QUEUE_VF] = "vf",
                [IPU3_CSS_QUEUE_STAT_3A]   = "3a",
        };
        static const char *rnames[IPU3_CSS_RECTS] = {
                [IPU3_CSS_RECT_EFFECTIVE] = "effective resolution",
                [IPU3_CSS_RECT_BDS]       = "bayer-domain scaled resolution",
                [IPU3_CSS_RECT_ENVELOPE]  = "DVS envelope size",
                [IPU3_CSS_RECT_GDC]  = "GDC output res",
        };
        struct v4l2_rect r[IPU3_CSS_RECTS] = { };
        struct v4l2_rect *const eff = &r[IPU3_CSS_RECT_EFFECTIVE];
        struct v4l2_rect *const bds = &r[IPU3_CSS_RECT_BDS];
        struct v4l2_rect *const env = &r[IPU3_CSS_RECT_ENVELOPE];
        struct v4l2_rect *const gdc = &r[IPU3_CSS_RECT_GDC];
        struct imgu_css_queue *q;
        struct v4l2_pix_format_mplane *in, *out, *vf;
        int i, s, ret;

        q = kcalloc(IPU3_CSS_QUEUES, sizeof(struct imgu_css_queue), GFP_KERNEL);
        if (!q)
                return -ENOMEM;

        in  = &q[IPU3_CSS_QUEUE_IN].fmt.mpix;
        out = &q[IPU3_CSS_QUEUE_OUT].fmt.mpix;
        vf  = &q[IPU3_CSS_QUEUE_VF].fmt.mpix;

        /* Adjust all formats, get statistics buffer sizes and formats */
        for (i = 0; i < IPU3_CSS_QUEUES; i++) {
                if (fmts[i])
                        dev_dbg(css->dev, "%s %s: (%i,%i) fmt 0x%x\n", __func__,
                                qnames[i], fmts[i]->width, fmts[i]->height,
                                fmts[i]->pixelformat);
                else
                        dev_dbg(css->dev, "%s %s: (not set)\n", __func__,
                                qnames[i]);
                if (imgu_css_queue_init(&q[i], fmts[i],
                                        IPU3_CSS_QUEUE_TO_FLAGS(i))) {
                        dev_notice(css->dev, "can not initialize queue %s\n",
                                   qnames[i]);
                        ret = -EINVAL;
                        goto out;
                }
        }
        for (i = 0; i < IPU3_CSS_RECTS; i++) {
                if (rects[i]) {
                        dev_dbg(css->dev, "%s %s: (%i,%i)\n", __func__,
                                rnames[i], rects[i]->width, rects[i]->height);
                        r[i].width  = rects[i]->width;
                        r[i].height = rects[i]->height;
                } else {
                        dev_dbg(css->dev, "%s %s: (not set)\n", __func__,
                                rnames[i]);
                }
                /* For now, force known good resolutions */
                r[i].left = 0;
                r[i].top  = 0;
        }

        /* Always require one input and vf only if out is also enabled */
        if (!imgu_css_queue_enabled(&q[IPU3_CSS_QUEUE_IN]) ||
            !imgu_css_queue_enabled(&q[IPU3_CSS_QUEUE_OUT])) {
                dev_warn(css->dev, "required queues are disabled\n");
                ret = -EINVAL;
                goto out;
        }

        if (!imgu_css_queue_enabled(&q[IPU3_CSS_QUEUE_OUT])) {
                out->width = in->width;
                out->height = in->height;
        }
        if (eff->width <= 0 || eff->height <= 0) {
                eff->width = in->width;
                eff->height = in->height;
        }
        if (bds->width <= 0 || bds->height <= 0) {
                bds->width = out->width;
                bds->height = out->height;
        }
        if (gdc->width <= 0 || gdc->height <= 0) {
                gdc->width = out->width;
                gdc->height = out->height;
        }

        in->width   = imgu_css_adjust(in->width, 1);
        in->height  = imgu_css_adjust(in->height, 1);
        eff->width  = imgu_css_adjust(eff->width, EFF_ALIGN_W);
        eff->height = imgu_css_adjust(eff->height, 1);
        bds->width  = imgu_css_adjust(bds->width, BDS_ALIGN_W);
        bds->height = imgu_css_adjust(bds->height, 1);
        gdc->width  = imgu_css_adjust(gdc->width, OUT_ALIGN_W);
        gdc->height = imgu_css_adjust(gdc->height, OUT_ALIGN_H);
        out->width  = imgu_css_adjust(out->width, OUT_ALIGN_W);
        out->height = imgu_css_adjust(out->height, OUT_ALIGN_H);
        vf->width   = imgu_css_adjust(vf->width, VF_ALIGN_W);
        vf->height  = imgu_css_adjust(vf->height, 1);

        s = (bds->width - gdc->width) / 2;
        env->width = s < MIN_ENVELOPE ? MIN_ENVELOPE : s;
        s = (bds->height - gdc->height) / 2;
        env->height = s < MIN_ENVELOPE ? MIN_ENVELOPE : s;

        ret = imgu_css_find_binary(css, pipe, q, r);
        if (ret < 0) {
                dev_err(css->dev, "failed to find suitable binary\n");
                ret = -EINVAL;
                goto out;
        }
        css->pipes[pipe].bindex = ret;

        dev_dbg(css->dev, "Binary index %d for pipe %d found.",
                css->pipes[pipe].bindex, pipe);

        /* Final adjustment and set back the queried formats */
        for (i = 0; i < IPU3_CSS_QUEUES; i++) {
                if (fmts[i]) {
                        if (imgu_css_queue_init(&q[i], &q[i].fmt.mpix,
                                                IPU3_CSS_QUEUE_TO_FLAGS(i))) {
                                dev_err(css->dev,
                                        "final resolution adjustment failed\n");
                                ret = -EINVAL;
                                goto out;
                        }
                        *fmts[i] = q[i].fmt.mpix;
                }
        }

        for (i = 0; i < IPU3_CSS_RECTS; i++)
                if (rects[i])
                        *rects[i] = r[i];

        dev_dbg(css->dev,
                "in(%u,%u) if(%u,%u) ds(%u,%u) gdc(%u,%u) out(%u,%u) vf(%u,%u)",
                 in->width, in->height, eff->width, eff->height,
                 bds->width, bds->height, gdc->width, gdc->height,
                 out->width, out->height, vf->width, vf->height);

        ret = 0;
out:
        kfree(q);
        return ret;
}

int imgu_css_fmt_set(struct imgu_css *css,
                     struct v4l2_pix_format_mplane *fmts[IPU3_CSS_QUEUES],
                     struct v4l2_rect *rects[IPU3_CSS_RECTS],
                     unsigned int pipe)
{
        struct v4l2_rect rect_data[IPU3_CSS_RECTS];
        struct v4l2_rect *all_rects[IPU3_CSS_RECTS];
        int i, r;
        struct imgu_css_pipe *css_pipe = &css->pipes[pipe];

        for (i = 0; i < IPU3_CSS_RECTS; i++) {
                if (rects[i])
                        rect_data[i] = *rects[i];
                else
                        memset(&rect_data[i], 0, sizeof(rect_data[i]));
                all_rects[i] = &rect_data[i];
        }
        r = imgu_css_fmt_try(css, fmts, all_rects, pipe);
        if (r < 0)
                return r;

        for (i = 0; i < IPU3_CSS_QUEUES; i++)
                if (imgu_css_queue_init(&css_pipe->queue[i], fmts[i],
                                        IPU3_CSS_QUEUE_TO_FLAGS(i)))
                        return -EINVAL;
        for (i = 0; i < IPU3_CSS_RECTS; i++) {
                css_pipe->rect[i] = rect_data[i];
                if (rects[i])
                        *rects[i] = rect_data[i];
        }

        return 0;
}

int imgu_css_meta_fmt_set(struct v4l2_meta_format *fmt)
{
        switch (fmt->dataformat) {
        case V4L2_META_FMT_IPU3_PARAMS:
                fmt->buffersize = sizeof(struct ipu3_uapi_params);

                /*
                 * Sanity check for the parameter struct size. This must
                 * not change!
                 */
                BUILD_BUG_ON(sizeof(struct ipu3_uapi_params) != 39328);

                break;
        case V4L2_META_FMT_IPU3_STAT_3A:
                fmt->buffersize = sizeof(struct ipu3_uapi_stats_3a);
                break;
        default:
                return -EINVAL;
        }

        return 0;
}

/*
 * Queue given buffer to CSS. imgu_css_buf_prepare() must have been first
 * called for the buffer. May be called from interrupt context.
 * Returns 0 on success, -EBUSY if the buffer queue is full, or some other
 * code on error conditions.
 */
int imgu_css_buf_queue(struct imgu_css *css, unsigned int pipe,
                       struct imgu_css_buffer *b)
{
        struct imgu_abi_buffer *abi_buf;
        struct imgu_addr_t *buf_addr;
        u32 data;
        int r;
        struct imgu_css_pipe *css_pipe = &css->pipes[pipe];

        if (!css->streaming)
                return -EPROTO; /* CSS or buffer in wrong state */

        if (b->queue >= IPU3_CSS_QUEUES || !imgu_css_queues[b->queue].qid)
                return -EINVAL;

        b->queue_pos = imgu_css_queue_pos(css, imgu_css_queues[b->queue].qid,
                                          pipe);

        if (b->queue_pos >= ARRAY_SIZE(css->pipes[pipe].abi_buffers[b->queue]))
                return -EIO;
        abi_buf = css->pipes[pipe].abi_buffers[b->queue][b->queue_pos].vaddr;

        /* Fill struct abi_buffer for firmware */
        memset(abi_buf, 0, sizeof(*abi_buf));

        buf_addr = (void *)abi_buf + imgu_css_queues[b->queue].ptr_ofs;
        *(imgu_addr_t *)buf_addr = b->daddr;

        if (b->queue == IPU3_CSS_QUEUE_STAT_3A)
                abi_buf->payload.s3a.data.dmem.s3a_tbl = b->daddr;

        if (b->queue == IPU3_CSS_QUEUE_OUT)
                abi_buf->payload.frame.padded_width =
                                css_pipe->queue[IPU3_CSS_QUEUE_OUT].width_pad;

        if (b->queue == IPU3_CSS_QUEUE_VF)
                abi_buf->payload.frame.padded_width =
                                        css_pipe->queue[IPU3_CSS_QUEUE_VF].width_pad;

        spin_lock(&css_pipe->qlock);
        list_add_tail(&b->list, &css_pipe->queue[b->queue].bufs);
        spin_unlock(&css_pipe->qlock);
        b->state = IPU3_CSS_BUFFER_QUEUED;

        data = css->pipes[pipe].abi_buffers[b->queue][b->queue_pos].daddr;
        r = imgu_css_queue_data(css, imgu_css_queues[b->queue].qid,
                                pipe, data);
        if (r < 0)
                goto queueing_failed;

        data = IMGU_ABI_EVENT_BUFFER_ENQUEUED(pipe,
                                              imgu_css_queues[b->queue].qid);
        r = imgu_css_queue_data(css, IMGU_ABI_QUEUE_EVENT_ID, pipe, data);
        if (r < 0)
                goto queueing_failed;

        dev_dbg(css->dev, "queued buffer %p to css queue %i in pipe %d\n",
                b, b->queue, pipe);

        return 0;

queueing_failed:
        b->state = (r == -EBUSY || r == -EAGAIN) ?

                IPU3_CSS_BUFFER_NEW : IPU3_CSS_BUFFER_FAILED;
        list_del(&b->list);

        return r;
}

/*
 * Get next ready CSS buffer. Returns -EAGAIN in which case the function
 * should be called again, or -EBUSY which means that there are no more
 * buffers available. May be called from interrupt context.
 */
struct imgu_css_buffer *imgu_css_buf_dequeue(struct imgu_css *css)
{
        static const unsigned char evtype_to_queue[] = {
                [IMGU_ABI_EVTTYPE_INPUT_FRAME_DONE] = IPU3_CSS_QUEUE_IN,
                [IMGU_ABI_EVTTYPE_OUT_FRAME_DONE] = IPU3_CSS_QUEUE_OUT,
                [IMGU_ABI_EVTTYPE_VF_OUT_FRAME_DONE] = IPU3_CSS_QUEUE_VF,
                [IMGU_ABI_EVTTYPE_3A_STATS_DONE] = IPU3_CSS_QUEUE_STAT_3A,
        };
        struct imgu_css_buffer *b = ERR_PTR(-EAGAIN);
        u32 event, daddr;
        int evtype, pipe, pipeid, queue, qid, r;
        struct imgu_css_pipe *css_pipe;

        if (!css->streaming)
                return ERR_PTR(-EPROTO);

        r = imgu_css_dequeue_data(css, IMGU_ABI_QUEUE_EVENT_ID, &event);
        if (r < 0)
                return ERR_PTR(r);

        evtype = (event & IMGU_ABI_EVTTYPE_EVENT_MASK) >>
                  IMGU_ABI_EVTTYPE_EVENT_SHIFT;

        switch (evtype) {
        case IMGU_ABI_EVTTYPE_OUT_FRAME_DONE:
        case IMGU_ABI_EVTTYPE_VF_OUT_FRAME_DONE:
        case IMGU_ABI_EVTTYPE_3A_STATS_DONE:
        case IMGU_ABI_EVTTYPE_INPUT_FRAME_DONE:
                pipe = (event & IMGU_ABI_EVTTYPE_PIPE_MASK) >>
                        IMGU_ABI_EVTTYPE_PIPE_SHIFT;
                pipeid = (event & IMGU_ABI_EVTTYPE_PIPEID_MASK) >>
                        IMGU_ABI_EVTTYPE_PIPEID_SHIFT;
                queue = evtype_to_queue[evtype];
                qid = imgu_css_queues[queue].qid;

                if (pipe >= IMGU_MAX_PIPE_NUM) {
                        dev_err(css->dev, "Invalid pipe: %i\n", pipe);
                        return ERR_PTR(-EIO);
                }

                if (qid >= IMGU_ABI_QUEUE_NUM) {
                        dev_err(css->dev, "Invalid qid: %i\n", qid);
                        return ERR_PTR(-EIO);
                }
                css_pipe = &css->pipes[pipe];
                dev_dbg(css->dev,
                        "event: buffer done 0x%x queue %i pipe %i pipeid %i\n",
                        event, queue, pipe, pipeid);

                r = imgu_css_dequeue_data(css, qid, &daddr);
                if (r < 0) {
                        dev_err(css->dev, "failed to dequeue buffer\n");
                        /* Force real error, not -EBUSY */
                        return ERR_PTR(-EIO);
                }

                r = imgu_css_queue_data(css, IMGU_ABI_QUEUE_EVENT_ID, pipe,
                                        IMGU_ABI_EVENT_BUFFER_DEQUEUED(qid));
                if (r < 0) {
                        dev_err(css->dev, "failed to queue event\n");
                        return ERR_PTR(-EIO);
                }

                spin_lock(&css_pipe->qlock);
                if (list_empty(&css_pipe->queue[queue].bufs)) {
                        spin_unlock(&css_pipe->qlock);
                        dev_err(css->dev, "event on empty queue\n");
                        return ERR_PTR(-EIO);
                }
                b = list_first_entry(&css_pipe->queue[queue].bufs,
                                     struct imgu_css_buffer, list);
                if (queue != b->queue ||
                    daddr != css_pipe->abi_buffers
                        [b->queue][b->queue_pos].daddr) {
                        spin_unlock(&css_pipe->qlock);
                        dev_err(css->dev, "dequeued bad buffer 0x%x\n", daddr);
                        return ERR_PTR(-EIO);
                }

                dev_dbg(css->dev, "buffer 0x%8x done from pipe %d\n", daddr, pipe);
                b->pipe = pipe;
                b->state = IPU3_CSS_BUFFER_DONE;
                list_del(&b->list);
                spin_unlock(&css_pipe->qlock);
                break;
        case IMGU_ABI_EVTTYPE_PIPELINE_DONE:
                pipe = (event & IMGU_ABI_EVTTYPE_PIPE_MASK) >>
                        IMGU_ABI_EVTTYPE_PIPE_SHIFT;
                if (pipe >= IMGU_MAX_PIPE_NUM) {
                        dev_err(css->dev, "Invalid pipe: %i\n", pipe);
                        return ERR_PTR(-EIO);
                }

                css_pipe = &css->pipes[pipe];
                dev_dbg(css->dev, "event: pipeline done 0x%8x for pipe %d\n",
                        event, pipe);
                break;
        case IMGU_ABI_EVTTYPE_TIMER:
                r = imgu_css_dequeue_data(css, IMGU_ABI_QUEUE_EVENT_ID, &event);
                if (r < 0)
                        return ERR_PTR(r);

                if ((event & IMGU_ABI_EVTTYPE_EVENT_MASK) >>
                    IMGU_ABI_EVTTYPE_EVENT_SHIFT == IMGU_ABI_EVTTYPE_TIMER)
                        dev_dbg(css->dev, "event: timer\n");
                else
                        dev_warn(css->dev, "half of timer event missing\n");
                break;
        case IMGU_ABI_EVTTYPE_FW_WARNING:
                dev_warn(css->dev, "event: firmware warning 0x%x\n", event);
                break;
        case IMGU_ABI_EVTTYPE_FW_ASSERT:
                dev_err(css->dev,
                        "event: firmware assert 0x%x module_id %i line_no %i\n",
                        event,
                        (event & IMGU_ABI_EVTTYPE_MODULEID_MASK) >>
                        IMGU_ABI_EVTTYPE_MODULEID_SHIFT,
                        swab16((event & IMGU_ABI_EVTTYPE_LINENO_MASK) >>
                               IMGU_ABI_EVTTYPE_LINENO_SHIFT));
                break;
        default:
                dev_warn(css->dev, "received unknown event 0x%x\n", event);
        }

        return b;
}

/*
 * Get a new set of parameters from pool and initialize them based on
 * the parameters params, gdc, and obgrid. Any of these may be NULL,
 * in which case the previously set parameters are used.
 * If parameters haven't been set previously, initialize from scratch.
 *
 * Return index to css->parameter_set_info which has the newly created
 * parameters or negative value on error.
 */
int imgu_css_set_parameters(struct imgu_css *css, unsigned int pipe,
                            struct ipu3_uapi_params *set_params)
{
        static const unsigned int queue_id = IMGU_ABI_QUEUE_A_ID;
        struct imgu_css_pipe *css_pipe = &css->pipes[pipe];
        const int stage = 0;
        const struct imgu_fw_info *bi;
        int obgrid_size;
        unsigned int stripes, i;
        struct ipu3_uapi_flags *use = set_params ? &set_params->use : NULL;

        /* Destination buffers which are filled here */
        struct imgu_abi_parameter_set_info *param_set;
        struct imgu_abi_acc_param *acc = NULL;
        struct imgu_abi_gdc_warp_param *gdc = NULL;
        struct ipu3_uapi_obgrid_param *obgrid = NULL;
        const struct imgu_css_map *map;
        void *vmem0 = NULL;
        void *dmem0 = NULL;

        enum imgu_abi_memories m;
        int r = -EBUSY;

        if (!css->streaming)
                return -EPROTO;

        dev_dbg(css->dev, "%s for pipe %d", __func__, pipe);

        bi = &css->fwp->binary_header[css_pipe->bindex];
        obgrid_size = imgu_css_fw_obgrid_size(bi);
        stripes = bi->info.isp.sp.iterator.num_stripes ? : 1;

        imgu_css_pool_get(&css_pipe->pool.parameter_set_info);
        param_set = imgu_css_pool_last(&css_pipe->pool.parameter_set_info,
                                       0)->vaddr;

        /* Get a new acc only if new parameters given, or none yet */
        map = imgu_css_pool_last(&css_pipe->pool.acc, 0);
        if (set_params || !map->vaddr) {
                imgu_css_pool_get(&css_pipe->pool.acc);
                map = imgu_css_pool_last(&css_pipe->pool.acc, 0);
                acc = map->vaddr;
        }

        /* Get new VMEM0 only if needed, or none yet */
        m = IMGU_ABI_MEM_ISP_VMEM0;
        map = imgu_css_pool_last(&css_pipe->pool.binary_params_p[m], 0);
        if (!map->vaddr || (set_params && (set_params->use.lin_vmem_params ||
                                           set_params->use.tnr3_vmem_params ||
                                           set_params->use.xnr3_vmem_params))) {
                imgu_css_pool_get(&css_pipe->pool.binary_params_p[m]);
                map = imgu_css_pool_last(&css_pipe->pool.binary_params_p[m], 0);
                vmem0 = map->vaddr;
        }

        /* Get new DMEM0 only if needed, or none yet */
        m = IMGU_ABI_MEM_ISP_DMEM0;
        map = imgu_css_pool_last(&css_pipe->pool.binary_params_p[m], 0);
        if (!map->vaddr || (set_params && (set_params->use.tnr3_dmem_params ||
                                           set_params->use.xnr3_dmem_params))) {
                imgu_css_pool_get(&css_pipe->pool.binary_params_p[m]);
                map = imgu_css_pool_last(&css_pipe->pool.binary_params_p[m], 0);
                dmem0 = map->vaddr;
        }

        /* Configure acc parameter cluster */
        if (acc) {
                /* get acc_old */
                map = imgu_css_pool_last(&css_pipe->pool.acc, 1);
                /* user acc */
                r = imgu_css_cfg_acc(css, pipe, use, acc, map->vaddr,
                        set_params ? &set_params->acc_param : NULL);
                if (r < 0)
                        goto fail;
        }

        /* Configure late binding parameters */
        if (vmem0) {
                m = IMGU_ABI_MEM_ISP_VMEM0;
                map = imgu_css_pool_last(&css_pipe->pool.binary_params_p[m], 1);
                r = imgu_css_cfg_vmem0(css, pipe, use, vmem0,
                                       map->vaddr, set_params);
                if (r < 0)
                        goto fail;
        }

        if (dmem0) {
                m = IMGU_ABI_MEM_ISP_DMEM0;
                map = imgu_css_pool_last(&css_pipe->pool.binary_params_p[m], 1);
                r = imgu_css_cfg_dmem0(css, pipe, use, dmem0,
                                       map->vaddr, set_params);
                if (r < 0)
                        goto fail;
        }

        /* Get a new gdc only if a new gdc is given, or none yet */
        if (bi->info.isp.sp.enable.dvs_6axis) {
                unsigned int a = IPU3_CSS_AUX_FRAME_REF;
                unsigned int g = IPU3_CSS_RECT_GDC;
                unsigned int e = IPU3_CSS_RECT_ENVELOPE;

                map = imgu_css_pool_last(&css_pipe->pool.gdc, 0);
                if (!map->vaddr) {
                        imgu_css_pool_get(&css_pipe->pool.gdc);
                        map = imgu_css_pool_last(&css_pipe->pool.gdc, 0);
                        gdc = map->vaddr;
                        imgu_css_cfg_gdc_table(map->vaddr,
                                css_pipe->aux_frames[a].bytesperline /
                                css_pipe->aux_frames[a].bytesperpixel,
                                css_pipe->aux_frames[a].height,
                                css_pipe->rect[g].width,
                                css_pipe->rect[g].height,
                                css_pipe->rect[e].width,
                                css_pipe->rect[e].height);
                }
        }

        /* Get a new obgrid only if a new obgrid is given, or none yet */
        map = imgu_css_pool_last(&css_pipe->pool.obgrid, 0);
        if (!map->vaddr || (set_params && set_params->use.obgrid_param)) {
                imgu_css_pool_get(&css_pipe->pool.obgrid);
                map = imgu_css_pool_last(&css_pipe->pool.obgrid, 0);
                obgrid = map->vaddr;

                /* Configure optical black level grid (obgrid) */
                if (set_params && set_params->use.obgrid_param)
                        for (i = 0; i < obgrid_size / sizeof(*obgrid); i++)
                                obgrid[i] = set_params->obgrid_param;
                else
                        memset(obgrid, 0, obgrid_size);
        }

        /* Configure parameter set info, queued to `queue_id' */

        memset(param_set, 0, sizeof(*param_set));
        map = imgu_css_pool_last(&css_pipe->pool.acc, 0);
        param_set->mem_map.acc_cluster_params_for_sp = map->daddr;

        map = imgu_css_pool_last(&css_pipe->pool.gdc, 0);
        param_set->mem_map.dvs_6axis_params_y = map->daddr;

        for (i = 0; i < stripes; i++) {
                map = imgu_css_pool_last(&css_pipe->pool.obgrid, 0);
                param_set->mem_map.obgrid_tbl[i] =
                        map->daddr + (obgrid_size / stripes) * i;
        }

        for (m = 0; m < IMGU_ABI_NUM_MEMORIES; m++) {
                map = imgu_css_pool_last(&css_pipe->pool.binary_params_p[m], 0);
                param_set->mem_map.isp_mem_param[stage][m] = map->daddr;
        }

        /* Then queue the new parameter buffer */
        map = imgu_css_pool_last(&css_pipe->pool.parameter_set_info, 0);
        r = imgu_css_queue_data(css, queue_id, pipe, map->daddr);
        if (r < 0)
                goto fail;

        r = imgu_css_queue_data(css, IMGU_ABI_QUEUE_EVENT_ID, pipe,
                                IMGU_ABI_EVENT_BUFFER_ENQUEUED(pipe,
                                                               queue_id));
        if (r < 0)
                goto fail_no_put;

        /* Finally dequeue all old parameter buffers */

        do {
                u32 daddr;

                r = imgu_css_dequeue_data(css, queue_id, &daddr);
                if (r == -EBUSY)
                        break;
                if (r)
                        goto fail_no_put;
                r = imgu_css_queue_data(css, IMGU_ABI_QUEUE_EVENT_ID, pipe,
                                        IMGU_ABI_EVENT_BUFFER_DEQUEUED
                                        (queue_id));
                if (r < 0) {
                        dev_err(css->dev, "failed to queue parameter event\n");
                        goto fail_no_put;
                }
        } while (1);

        return 0;

fail:
        /*
         * A failure, most likely the parameter queue was full.
         * Return error but continue streaming. User can try submitting new
         * parameters again later.
         */

        imgu_css_pool_put(&css_pipe->pool.parameter_set_info);
        if (acc)
                imgu_css_pool_put(&css_pipe->pool.acc);
        if (gdc)
                imgu_css_pool_put(&css_pipe->pool.gdc);
        if (obgrid)
                imgu_css_pool_put(&css_pipe->pool.obgrid);
        if (vmem0)
                imgu_css_pool_put(
                        &css_pipe->pool.binary_params_p
                        [IMGU_ABI_MEM_ISP_VMEM0]);
        if (dmem0)
                imgu_css_pool_put(
                        &css_pipe->pool.binary_params_p
                        [IMGU_ABI_MEM_ISP_DMEM0]);

fail_no_put:
        return r;
}

int imgu_css_irq_ack(struct imgu_css *css)
{
        static const int NUM_SWIRQS = 3;
        struct imgu_fw_info *bi = &css->fwp->binary_header[css->fw_sp[0]];
        void __iomem *const base = css->base;
        u32 irq_status[IMGU_IRQCTRL_NUM];
        int i;

        u32 imgu_status = readl(base + IMGU_REG_INT_STATUS);

        writel(imgu_status, base + IMGU_REG_INT_STATUS);
        for (i = 0; i < IMGU_IRQCTRL_NUM; i++)
                irq_status[i] = readl(base + IMGU_REG_IRQCTRL_STATUS(i));

        for (i = 0; i < NUM_SWIRQS; i++) {
                if (irq_status[IMGU_IRQCTRL_SP0] & IMGU_IRQCTRL_IRQ_SW_PIN(i)) {
                        /* SP SW interrupt */
                        u32 cnt = readl(base + IMGU_REG_SP_DMEM_BASE(0) +
                                        bi->info.sp.output);
                        u32 val = readl(base + IMGU_REG_SP_DMEM_BASE(0) +
                                        bi->info.sp.output + 4 + 4 * i);

                        dev_dbg(css->dev, "%s: swirq %i cnt %i val 0x%x\n",
                                __func__, i, cnt, val);
                }
        }

        for (i = IMGU_IRQCTRL_NUM - 1; i >= 0; i--)
                if (irq_status[i]) {
                        writel(irq_status[i], base + IMGU_REG_IRQCTRL_CLEAR(i));
                        /* Wait for write to complete */
                        readl(base + IMGU_REG_IRQCTRL_ENABLE(i));
                }

        dev_dbg(css->dev, "%s: imgu 0x%x main 0x%x sp0 0x%x sp1 0x%x\n",
                __func__, imgu_status, irq_status[IMGU_IRQCTRL_MAIN],
                irq_status[IMGU_IRQCTRL_SP0], irq_status[IMGU_IRQCTRL_SP1]);

        if (!imgu_status && !irq_status[IMGU_IRQCTRL_MAIN])
                return -ENOMSG;

        return 0;
}