On 11/22/2011 01:01 PM, Javier Martin wrote:
> Changes since v1:
> - Embed queue data in ctx structure to allow multi instance.
> - Remove redundant job_ready callback.
> - Adjust format against device capabilities.
> - Register/unregister video device at the right time.
> - Other minor coding fixes.
>
> Signed-off-by: Javier Martin<javier.mar...@vista-silicon.com>
> ---
> drivers/media/video/Kconfig | 10 +
> drivers/media/video/Makefile | 2 +
> drivers/media/video/mx2_emmaprp.c | 1035
> +++++++++++++++++++++++++++++++++++++
> 3 files changed, 1047 insertions(+), 0 deletions(-)
> create mode 100644 drivers/media/video/mx2_emmaprp.c
>
> diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
> index b303a3f..77d7921 100644
> --- a/drivers/media/video/Kconfig
> +++ b/drivers/media/video/Kconfig
> @@ -1107,4 +1107,14 @@ config VIDEO_SAMSUNG_S5P_MFC
> help
> MFC 5.1 driver for V4L2.
>
> +config VIDEO_MX2_EMMAPRP
> + tristate "MX2 eMMa-PrP support"
> + depends on VIDEO_DEV&& VIDEO_V4L2&& MACH_MX27
> + select VIDEOBUF2_DMA_CONTIG
> + select V4L2_MEM2MEM_DEV
> + help
> + MX2X chips have a PrP that can be used to process buffers from
> + memory to memory. Operations include resizing and format
> + conversion.
> +
> endif # V4L_MEM2MEM_DRIVERS
> diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
> index 117f9c4..7ae711e 100644
> --- a/drivers/media/video/Makefile
> +++ b/drivers/media/video/Makefile
> @@ -176,6 +176,8 @@ obj-$(CONFIG_VIDEO_SH_MOBILE_CEU) +=
> sh_mobile_ceu_camera.o
> obj-$(CONFIG_VIDEO_OMAP1) += omap1_camera.o
> obj-$(CONFIG_VIDEO_ATMEL_ISI) += atmel-isi.o
>
> +obj-$(CONFIG_VIDEO_MX2_EMMAPRP) += mx2_emmaprp.o
> +
> obj-$(CONFIG_VIDEO_SAMSUNG_S5P_FIMC) += s5p-fimc/
> obj-$(CONFIG_VIDEO_SAMSUNG_S5P_MFC) += s5p-mfc/
> obj-$(CONFIG_VIDEO_SAMSUNG_S5P_TV) += s5p-tv/
> diff --git a/drivers/media/video/mx2_emmaprp.c
> b/drivers/media/video/mx2_emmaprp.c
> new file mode 100644
> index 0000000..6b98aac
> --- /dev/null
> +++ b/drivers/media/video/mx2_emmaprp.c
> @@ -0,0 +1,1035 @@
> +/*
> + * Support eMMa-PrP through mem2mem framework.
> + *
> + * eMMa-PrP is a piece of HW that allows fetching buffers
> + * from one memory location and do several operations on
> + * them such as scaling or format conversion giving, as a result
> + * a new processed buffer in another memory location.
> + *
> + * Based on mem2mem_testdev.c by Pawel Osciak.
> + *
> + * Copyright (c) 2011 Vista Silicon S.L.
> + * Javier Martin<javier.mar...@vista-silicon.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by the
> + * Free Software Foundation; either version 2 of the
> + * License, or (at your option) any later version
> + */
> +#include<linux/module.h>
> +#include<linux/clk.h>
> +#include<linux/slab.h>
> +#include<linux/interrupt.h>
You may want to add
#include <asm/sizes.h>
for SZ_1M.
> +
> +#include<linux/platform_device.h>
> +#include<media/v4l2-mem2mem.h>
> +#include<media/v4l2-device.h>
> +#include<media/v4l2-ioctl.h>
> +#include<media/videobuf2-dma-contig.h>
> +
> +#define EMMAPRP_MODULE_NAME "mem2mem-emmaprp"
> +
> +MODULE_DESCRIPTION("mem2mem device which supports eMMa-PrP present in mx2
> SoCs");
How about s/mem2mem/Mem-to-mem ?
> +MODULE_AUTHOR("Javier Martin<javier.mar...@vista-silicon.com");
> +MODULE_LICENSE("GPL");
> +MODULE_VERSION("0.0.1");
> +
> +static bool debug;
> +module_param(debug, bool, 0644);
> +
> +#define MIN_W 32
> +#define MIN_H 32
> +#define MAX_W 2040
> +#define MAX_H 2046
> +
> +#define W_ALIGN_MASK_YUV420 0x07 /* multiple of 8 */
> +#define W_ALIGN_MASK_OTHERS 0x03 /* multiple of 4 */
> +#define H_ALIGN_MASK 0x01 /* multiple of 2 */
> +
> +/* Flags that indicate a format can be used for capture/output */
> +#define MEM2MEM_CAPTURE (1<< 0)
> +#define MEM2MEM_OUTPUT (1<< 1)
> +
> +#define MEM2MEM_NAME "m2m-emmaprp"
> +
> +/* In bytes, per queue */
> +#define MEM2MEM_VID_MEM_LIMIT (16 * SZ_1M)
> +
> +#define dprintk(dev, fmt, arg...) \
> + v4l2_dbg(1, debug,&dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
> +
> +/* EMMA PrP */
> +#define PRP_CNTL 0x00
> +#define PRP_INTR_CNTL 0x04
> +#define PRP_INTRSTATUS 0x08
> +#define PRP_SOURCE_Y_PTR 0x0c
> +#define PRP_SOURCE_CB_PTR 0x10
> +#define PRP_SOURCE_CR_PTR 0x14
> +#define PRP_DEST_RGB1_PTR 0x18
> +#define PRP_DEST_RGB2_PTR 0x1c
> +#define PRP_DEST_Y_PTR 0x20
> +#define PRP_DEST_CB_PTR 0x24
> +#define PRP_DEST_CR_PTR 0x28
> +#define PRP_SRC_FRAME_SIZE 0x2c
> +#define PRP_DEST_CH1_LINE_STRIDE 0x30
> +#define PRP_SRC_PIXEL_FORMAT_CNTL 0x34
> +#define PRP_CH1_PIXEL_FORMAT_CNTL 0x38
> +#define PRP_CH1_OUT_IMAGE_SIZE 0x3c
> +#define PRP_CH2_OUT_IMAGE_SIZE 0x40
> +#define PRP_SRC_LINE_STRIDE 0x44
> +#define PRP_CSC_COEF_012 0x48
> +#define PRP_CSC_COEF_345 0x4c
> +#define PRP_CSC_COEF_678 0x50
> +#define PRP_CH1_RZ_HORI_COEF1 0x54
> +#define PRP_CH1_RZ_HORI_COEF2 0x58
> +#define PRP_CH1_RZ_HORI_VALID 0x5c
> +#define PRP_CH1_RZ_VERT_COEF1 0x60
> +#define PRP_CH1_RZ_VERT_COEF2 0x64
> +#define PRP_CH1_RZ_VERT_VALID 0x68
> +#define PRP_CH2_RZ_HORI_COEF1 0x6c
> +#define PRP_CH2_RZ_HORI_COEF2 0x70
> +#define PRP_CH2_RZ_HORI_VALID 0x74
> +#define PRP_CH2_RZ_VERT_COEF1 0x78
> +#define PRP_CH2_RZ_VERT_COEF2 0x7c
> +#define PRP_CH2_RZ_VERT_VALID 0x80
> +
> +#define PRP_CNTL_CH1EN (1<< 0)
> +#define PRP_CNTL_CH2EN (1<< 1)
> +#define PRP_CNTL_CSIEN (1<< 2)
> +#define PRP_CNTL_DATA_IN_YUV420 (0<< 3)
> +#define PRP_CNTL_DATA_IN_YUV422 (1<< 3)
> +#define PRP_CNTL_DATA_IN_RGB16 (2<< 3)
> +#define PRP_CNTL_DATA_IN_RGB32 (3<< 3)
> +#define PRP_CNTL_CH1_OUT_RGB8 (0<< 5)
> +#define PRP_CNTL_CH1_OUT_RGB16 (1<< 5)
> +#define PRP_CNTL_CH1_OUT_RGB32 (2<< 5)
> +#define PRP_CNTL_CH1_OUT_YUV422 (3<< 5)
> +#define PRP_CNTL_CH2_OUT_YUV420 (0<< 7)
> +#define PRP_CNTL_CH2_OUT_YUV422 (1<< 7)
> +#define PRP_CNTL_CH2_OUT_YUV444 (2<< 7)
> +#define PRP_CNTL_CH1_LEN (1<< 9)
> +#define PRP_CNTL_CH2_LEN (1<< 10)
> +#define PRP_CNTL_SKIP_FRAME (1<< 11)
> +#define PRP_CNTL_SWRST (1<< 12)
> +#define PRP_CNTL_CLKEN (1<< 13)
> +#define PRP_CNTL_WEN (1<< 14)
> +#define PRP_CNTL_CH1BYP (1<< 15)
> +#define PRP_CNTL_IN_TSKIP(x) ((x)<< 16)
> +#define PRP_CNTL_CH1_TSKIP(x) ((x)<< 19)
> +#define PRP_CNTL_CH2_TSKIP(x) ((x)<< 22)
> +#define PRP_CNTL_INPUT_FIFO_LEVEL(x) ((x)<< 25)
> +#define PRP_CNTL_RZ_FIFO_LEVEL(x) ((x)<< 27)
> +#define PRP_CNTL_CH2B1EN (1<< 29)
> +#define PRP_CNTL_CH2B2EN (1<< 30)
> +#define PRP_CNTL_CH2FEN (1<< 31)
> +
> +#define PRP_SIZE_HEIGHT(x) (x)
> +#define PRP_SIZE_WIDTH(x) ((x)<< 16)
> +
> +/* IRQ Enable and status register */
> +#define PRP_INTR_RDERR (1<< 0)
> +#define PRP_INTR_CH1WERR (1<< 1)
> +#define PRP_INTR_CH2WERR (1<< 2)
> +#define PRP_INTR_CH1FC (1<< 3)
> +#define PRP_INTR_CH2FC (1<< 5)
> +#define PRP_INTR_LBOVF (1<< 7)
> +#define PRP_INTR_CH2OVF (1<< 8)
> +
> +#define PRP_INTR_ST_RDERR (1<< 0)
> +#define PRP_INTR_ST_CH1WERR (1<< 1)
> +#define PRP_INTR_ST_CH2WERR (1<< 2)
> +#define PRP_INTR_ST_CH2B2CI (1<< 3)
> +#define PRP_INTR_ST_CH2B1CI (1<< 4)
> +#define PRP_INTR_ST_CH1B2CI (1<< 5)
> +#define PRP_INTR_ST_CH1B1CI (1<< 6)
> +#define PRP_INTR_ST_LBOVF (1<< 7)
> +#define PRP_INTR_ST_CH2OVF (1<< 8)
> +
> +struct emmaprp_fmt {
> + char *name;
> + u32 fourcc;
> + /* Types the format can be used for */
> + u32 types;
> +};
> +
> +static struct emmaprp_fmt formats[] = {
> + {
> + .name = "YUV 4:2:0 Planar",
> + .fourcc = V4L2_PIX_FMT_YUV420,
> + .types = MEM2MEM_CAPTURE,
> + },
> + {
> + .name = "4:2:2, packed, YUYV",
> + .fourcc = V4L2_PIX_FMT_YUYV,
> + .types = MEM2MEM_OUTPUT,
> + },
> +};
> +
> +/* Per-queue, driver-specific private data */
> +struct emmaprp_q_data {
> + unsigned int width;
> + unsigned int height;
> + unsigned int sizeimage;
> + struct emmaprp_fmt *fmt;
> +};
> +
> +enum {
> + V4L2_M2M_SRC = 0,
> + V4L2_M2M_DST = 1,
> +};
> +
> +#define NUM_FORMATS ARRAY_SIZE(formats)
> +
> +static struct emmaprp_fmt *find_format(struct v4l2_format *f)
> +{
> + struct emmaprp_fmt *fmt;
> + unsigned int k;
> +
> + for (k = 0; k< NUM_FORMATS; k++) {
> + fmt =&formats[k];
> + if (fmt->fourcc == f->fmt.pix.pixelformat)
> + break;
> + }
> +
> + if (k == NUM_FORMATS)
> + return NULL;
> +
> + return&formats[k];
> +}
> +
> +struct emmaprp_dev {
> + struct v4l2_device v4l2_dev;
> + struct video_device *vfd;
> +
> + struct mutex dev_mutex;
> + spinlock_t irqlock;
> +
> + int irq_emma;
> + void __iomem *base_emma;
> + struct clk *clk_emma;
> + struct resource *res_emma;
> +
> + struct v4l2_m2m_dev *m2m_dev;
> + struct vb2_alloc_ctx *alloc_ctx;
> +};
> +
> +struct emmaprp_ctx {
> + struct emmaprp_dev *dev;
> + /* Abort requested by m2m */
> + int aborting;
> + struct emmaprp_q_data q_data[2];
> + struct v4l2_m2m_ctx *m2m_ctx;
> +};
> +
> +static struct emmaprp_q_data *get_q_data(struct emmaprp_ctx *ctx,
> + enum v4l2_buf_type type)
> +{
> + switch (type) {
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> + return&(ctx->q_data[V4L2_M2M_SRC]);
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> + return&(ctx->q_data[V4L2_M2M_DST]);
> + default:
> + BUG();
> + }
> + return NULL;
> +}
> +
> +/*
> + * mem2mem callbacks
> + */
> +static void emmaprp_job_abort(void *priv)
> +{
> + struct emmaprp_ctx *ctx = priv;
> + struct emmaprp_dev *pcdev = ctx->dev;
> +
> + ctx->aborting = 1;
> +
> + dprintk(pcdev, "Aborting task\n");
> +
> + v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
> +}
> +
> +static void emmaprp_lock(void *priv)
> +{
> + struct emmaprp_ctx *ctx = priv;
> + struct emmaprp_dev *pcdev = ctx->dev;
> + mutex_lock(&pcdev->dev_mutex);
> +}
> +
> +static void emmaprp_unlock(void *priv)
> +{
> + struct emmaprp_ctx *ctx = priv;
> + struct emmaprp_dev *pcdev = ctx->dev;
> + mutex_unlock(&pcdev->dev_mutex);
> +}
> +
> +static inline void emmaprp_dump_regs(struct emmaprp_dev *pcdev)
> +{
> + dprintk(pcdev,
> + "eMMa-PrP Registers:\n"
> + " SOURCE_Y_PTR = 0x%08X\n"
> + " SRC_FRAME_SIZE = 0x%08X\n"
> + " DEST_Y_PTR = 0x%08X\n"
> + " DEST_CR_PTR = 0x%08X\n"
> + " DEST_CB_PTR = 0x%08X\n"
> + " CH2_OUT_IMAGE_SIZE = 0x%08X\n"
> + " CNTL = 0x%08X\n",
> + readl(pcdev->base_emma + PRP_SOURCE_Y_PTR),
> + readl(pcdev->base_emma + PRP_SRC_FRAME_SIZE),
> + readl(pcdev->base_emma + PRP_DEST_Y_PTR),
> + readl(pcdev->base_emma + PRP_DEST_CR_PTR),
> + readl(pcdev->base_emma + PRP_DEST_CB_PTR),
> + readl(pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE),
> + readl(pcdev->base_emma + PRP_CNTL));
> +}
> +
> +static void emmaprp_device_run(void *priv)
> +{
> + struct emmaprp_ctx *ctx = priv;
> + struct emmaprp_q_data *s_q_data, *d_q_data;
> + struct vb2_buffer *src_buf, *dst_buf;
> + struct emmaprp_dev *pcdev = ctx->dev;
> + unsigned int s_width, s_height;
> + unsigned int d_width, d_height;
> + unsigned int d_size;
> + dma_addr_t p_in, p_out;
> + u32 tmp;
> +
> + src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
> + dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
> +
> + s_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
> + s_width = s_q_data->width;
> + s_height = s_q_data->height;
> +
> + d_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
> + d_width = d_q_data->width;
> + d_height = d_q_data->height;
> + d_size = d_width * d_height;
> +
> + p_in = vb2_dma_contig_plane_dma_addr(src_buf, 0);
> + p_out = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
> + if (!p_in || !p_out) {
> + v4l2_err(&pcdev->v4l2_dev,
> + "Acquiring kernel pointers to buffers failed\n");
> + return;
> + }
> +
> + /* Input frame parameters */
> + writel(p_in, pcdev->base_emma + PRP_SOURCE_Y_PTR);
> + writel(PRP_SIZE_WIDTH(s_width) | PRP_SIZE_HEIGHT(s_height),
> + pcdev->base_emma + PRP_SRC_FRAME_SIZE);
> +
> + /* Output frame parameters */
> + writel(p_out, pcdev->base_emma + PRP_DEST_Y_PTR);
> + writel(p_out + d_size, pcdev->base_emma + PRP_DEST_CB_PTR);
> + writel(p_out + d_size + (d_size>> 2),
> + pcdev->base_emma + PRP_DEST_CR_PTR);
> + writel(PRP_SIZE_WIDTH(d_width) | PRP_SIZE_HEIGHT(d_height),
> + pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE);
> +
> + /* IRQ configuration */
> + tmp = readl(pcdev->base_emma + PRP_INTR_CNTL);
> + writel(tmp | PRP_INTR_RDERR |
> + PRP_INTR_CH2WERR |
> + PRP_INTR_CH2FC,
> + pcdev->base_emma + PRP_INTR_CNTL);
> +
> + emmaprp_dump_regs(pcdev);
> +
> + /* Enable transfer */
> + tmp = readl(pcdev->base_emma + PRP_CNTL);
> + writel(tmp | PRP_CNTL_CH2_OUT_YUV420 |
> + PRP_CNTL_DATA_IN_YUV422 |
> + PRP_CNTL_CH2EN,
> + pcdev->base_emma + PRP_CNTL);
> +}
> +
> +static irqreturn_t emmaprp_irq(int irq_emma, void *data)
> +{
> + struct emmaprp_dev *pcdev = data;
> + struct emmaprp_ctx *curr_ctx;
> + struct vb2_buffer *src_vb, *dst_vb;
> + unsigned long flags;
> + u32 irqst;
> +
> + /* Check irq flags and clear irq */
> + irqst = readl(pcdev->base_emma + PRP_INTRSTATUS);
> + writel(irqst, pcdev->base_emma + PRP_INTRSTATUS);
> + dprintk(pcdev, "irqst = 0x%08x\n", irqst);
> +
> + curr_ctx = v4l2_m2m_get_curr_priv(pcdev->m2m_dev);
> + if (NULL == curr_ctx) {
Nit: (lval == const) is used anywhere else in the patch, perhaps it's worth
to change this line to follow the convention.
> + pr_err("Instance released before the end of transaction\n");
> + return IRQ_HANDLED;
> + }
> +
> + if (curr_ctx->aborting)
> + goto irq_ok;
> +
> + if ((irqst& PRP_INTR_ST_RDERR) ||
> + (irqst& PRP_INTR_ST_CH2WERR)) {
> + pr_err("PrP bus error ocurred, this transfer is probably
> corrupted\n");
> + writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL);
> + goto irq_ok;
> + }
> +
> + if (irqst& PRP_INTR_ST_CH2B1CI) { /* buffer ready */
Nit: by making it "else if" you could drop the above "goto".
> + src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
> + dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
> +
> + spin_lock_irqsave(&pcdev->irqlock, flags);
> + v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
> + v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
> + spin_unlock_irqrestore(&pcdev->irqlock, flags);
> + goto irq_ok;
Superfluous goto.
> + }
> +
> +irq_ok:
> + v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
> +
> + return IRQ_HANDLED;
> +}
> +
> +/*
> + * video ioctls
> + */
> +static int vidioc_querycap(struct file *file, void *priv,
> + struct v4l2_capability *cap)
> +{
> + strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
> + strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
> + cap->bus_info[0] = 0;
> + cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT
> + | V4L2_CAP_STREAMING;
> +
> + return 0;
> +}
> +
> +static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
> +{
> + int i, num;
> + struct emmaprp_fmt *fmt;
> +
> + num = 0;
> +
> + for (i = 0; i< NUM_FORMATS; ++i) {
> + if (formats[i].types& type) {
> + /* index-th format of type type found ? */
> + if (num == f->index)
> + break;
> + /* Correct type but haven't reached our index yet,
> + * just increment per-type index */
> + ++num;
> + }
> + }
> +
> + if (i< NUM_FORMATS) {
> + /* Format found */
> + fmt =&formats[i];
> + strncpy(f->description, fmt->name, sizeof(f->description) - 1);
strlcpy needs to be used here.
> + f->pixelformat = fmt->fourcc;
> + return 0;
> + }
> +
> + /* Format not found */
> + return -EINVAL;
> +}
> +
> +static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_fmtdesc *f)
> +{
> + return enum_fmt(f, MEM2MEM_CAPTURE);
> +}
> +
> +static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_fmtdesc *f)
> +{
> + return enum_fmt(f, MEM2MEM_OUTPUT);
> +}
> +
> +static int vidioc_g_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
> +{
> + struct vb2_queue *vq;
> + struct emmaprp_q_data *q_data;
> +
> + vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
> + if (!vq)
> + return -EINVAL;
> +
> + q_data = get_q_data(ctx, f->type);
> +
> + f->fmt.pix.width = q_data->width;
> + f->fmt.pix.height = q_data->height;
> + f->fmt.pix.field = V4L2_FIELD_NONE;
> + f->fmt.pix.pixelformat = q_data->fmt->fourcc;
> + if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420)
> + f->fmt.pix.bytesperline = q_data->width * 3 / 2;
> + else /* YUYV */
> + f->fmt.pix.bytesperline = q_data->width * 2;
> + f->fmt.pix.sizeimage = q_data->sizeimage;
> +
> + return 0;
> +}
> +
> +static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + return vidioc_g_fmt(priv, f);
> +}
> +
> +static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + return vidioc_g_fmt(priv, f);
> +}
> +
> +static int vidioc_try_fmt(struct v4l2_format *f)
> +{
> + enum v4l2_field field;
> +
> +
> + if (!find_format(f))
> + return -EINVAL;
> +
> + field = f->fmt.pix.field;
> + if (field == V4L2_FIELD_ANY)
> + field = V4L2_FIELD_NONE;
> + else if (V4L2_FIELD_NONE != field)
> + return -EINVAL;
> +
> + /* V4L2 specification suggests the driver corrects the format struct
> + * if any of the dimensions is unsupported */
> + f->fmt.pix.field = field;
> +
> + f->fmt.pix.height = clamp_t(u32, f->fmt.pix.height, MIN_H, MAX_H);
> + f->fmt.pix.width = clamp_t(u32, f->fmt.pix.width, MIN_W, MAX_W);
> +
> + f->fmt.pix.height&= ~H_ALIGN_MASK;
> + if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) {
> + f->fmt.pix.width&= ~W_ALIGN_MASK_YUV420;
> + f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
> + } else { /* YUYV */
> + f->fmt.pix.width&= ~W_ALIGN_MASK_OTHERS;
> + f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
> + }
> + f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
> +
> + return 0;
> +}
> +
> +static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct emmaprp_fmt *fmt;
> + struct emmaprp_ctx *ctx = priv;
> +
> + fmt = find_format(f);
> + if (!fmt || !(fmt->types& MEM2MEM_CAPTURE)) {
> + v4l2_err(&ctx->dev->v4l2_dev,
> + "Fourcc format (0x%08x) invalid.\n",
> + f->fmt.pix.pixelformat);
> + return -EINVAL;
> + }
> +
> + return vidioc_try_fmt(f);
> +}
> +
> +static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct emmaprp_fmt *fmt;
> + struct emmaprp_ctx *ctx = priv;
> +
> + fmt = find_format(f);
> + if (!fmt || !(fmt->types& MEM2MEM_OUTPUT)) {
> + v4l2_err(&ctx->dev->v4l2_dev,
> + "Fourcc format (0x%08x) invalid.\n",
> + f->fmt.pix.pixelformat);
> + return -EINVAL;
> + }
> +
> + return vidioc_try_fmt(f);
> +}
> +
> +static int vidioc_s_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
> +{
> + struct emmaprp_q_data *q_data;
> + struct vb2_queue *vq;
> + int ret;
> +
> + vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
> + if (!vq)
> + return -EINVAL;
> +
> + q_data = get_q_data(ctx, f->type);
> + if (!q_data)
> + return -EINVAL;
> +
> + if (vb2_is_busy(vq)) {
> + v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
> + return -EBUSY;
> + }
> +
> + ret = vidioc_try_fmt(f);
> + if (ret)
> + return ret;
> +
> + q_data->fmt = find_format(f);
> + q_data->width = f->fmt.pix.width;
> + q_data->height = f->fmt.pix.height;
> + if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
> + q_data->sizeimage = q_data->width * q_data->height * 3 / 2;
> + else /* YUYV */
> + q_data->sizeimage = q_data->width * q_data->height * 2;
> +
> + dprintk(ctx->dev,
> + "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
> + f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
> +
> + return 0;
> +}
> +
> +static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + int ret;
> +
> + ret = vidioc_try_fmt_vid_cap(file, priv, f);
> + if (ret)
> + return ret;
> +
> + return vidioc_s_fmt(priv, f);
> +}
> +
> +static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + int ret;
> +
> + ret = vidioc_try_fmt_vid_out(file, priv, f);
> + if (ret)
> + return ret;
> +
> + return vidioc_s_fmt(priv, f);
> +}
> +
> +static int vidioc_reqbufs(struct file *file, void *priv,
> + struct v4l2_requestbuffers *reqbufs)
> +{
> + struct emmaprp_ctx *ctx = priv;
> +
> + return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
> +}
> +
> +static int vidioc_querybuf(struct file *file, void *priv,
> + struct v4l2_buffer *buf)
> +{
> + struct emmaprp_ctx *ctx = priv;
> +
> + return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
> +}
> +
> +static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer
> *buf)
> +{
> + struct emmaprp_ctx *ctx = priv;
> +
> + return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
> +}
> +
> +static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer
> *buf)
> +{
> + struct emmaprp_ctx *ctx = priv;
> +
> + return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
> +}
> +
> +static int vidioc_streamon(struct file *file, void *priv,
> + enum v4l2_buf_type type)
> +{
> + struct emmaprp_ctx *ctx = priv;
> +
> + return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
> +}
> +
> +static int vidioc_streamoff(struct file *file, void *priv,
> + enum v4l2_buf_type type)
> +{
> + struct emmaprp_ctx *ctx = priv;
> +
> + return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
> +}
> +
> +static const struct v4l2_ioctl_ops emmaprp_ioctl_ops = {
> + .vidioc_querycap = vidioc_querycap,
> +
> + .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
> + .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
> + .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
> + .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
> +
> + .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
> + .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
> + .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
> + .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
> +
> + .vidioc_reqbufs = vidioc_reqbufs,
> + .vidioc_querybuf = vidioc_querybuf,
> +
> + .vidioc_qbuf = vidioc_qbuf,
> + .vidioc_dqbuf = vidioc_dqbuf,
> +
> + .vidioc_streamon = vidioc_streamon,
> + .vidioc_streamoff = vidioc_streamoff,
> +};
> +
> +
> +/*
> + * Queue operations
> + */
> +struct vb2_dc_conf {
This is unused, probably could be removed.
> + struct device *dev;
> +};
> +
> +static int emmaprp_queue_setup(struct vb2_queue *vq,
> + const struct v4l2_format *fmt,
> + unsigned int *nbuffers, unsigned int *nplanes,
> + unsigned int sizes[], void *alloc_ctxs[])
> +{
> + struct emmaprp_ctx *ctx = vb2_get_drv_priv(vq);
> + struct emmaprp_q_data *q_data;
> + unsigned int size, count = *nbuffers;
> +
> + q_data = get_q_data(ctx, vq->type);
> +
> + if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
> + size = q_data->width * q_data->height * 3 / 2;
> + else
> + size = q_data->width * q_data->height * 2;
> +
> + while (size * count> MEM2MEM_VID_MEM_LIMIT)
> + (count)--;
> +
> + *nplanes = 1;
> + *nbuffers = count;
> + sizes[0] = size;
> +
> + alloc_ctxs[0] = ctx->dev->alloc_ctx;
> +
> + dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
> +
> + return 0;
> +}
> +
> +static int emmaprp_buf_prepare(struct vb2_buffer *vb)
> +{
> + struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
> + struct emmaprp_q_data *q_data;
> +
> + dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
> +
> + q_data = get_q_data(ctx, vb->vb2_queue->type);
> +
> + if (vb2_plane_size(vb, 0)< q_data->sizeimage) {
> + dprintk(ctx->dev, "%s data will not fit into plane"
> + "(%lu< %lu)\n", __func__,
> + vb2_plane_size(vb, 0),
> + (long)q_data->sizeimage);
> + return -EINVAL;
> + }
> +
> + vb2_set_plane_payload(vb, 0, q_data->sizeimage);
> +
> + return 0;
> +}
> +
> +static void emmaprp_buf_queue(struct vb2_buffer *vb)
> +{
> + struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
> + v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
> +}
> +
> +static struct vb2_ops emmaprp_qops = {
> + .queue_setup = emmaprp_queue_setup,
> + .buf_prepare = emmaprp_buf_prepare,
> + .buf_queue = emmaprp_buf_queue,
> +};
> +
> +static int queue_init(void *priv, struct vb2_queue *src_vq,
> + struct vb2_queue *dst_vq)
> +{
> + struct emmaprp_ctx *ctx = priv;
> + int ret;
> +
> + memset(src_vq, 0, sizeof(*src_vq));
> + src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
> + src_vq->io_modes = VB2_MMAP;
> + src_vq->drv_priv = ctx;
> + src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
> + src_vq->ops =&emmaprp_qops;
> + src_vq->mem_ops =&vb2_dma_contig_memops;
> +
> + ret = vb2_queue_init(src_vq);
> + if (ret)
> + return ret;
> +
> + memset(dst_vq, 0, sizeof(*dst_vq));
> + dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> + dst_vq->io_modes = VB2_MMAP;
> + dst_vq->drv_priv = ctx;
> + dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
> + dst_vq->ops =&emmaprp_qops;
> + dst_vq->mem_ops =&vb2_dma_contig_memops;
> +
> + return vb2_queue_init(dst_vq);
> +}
> +
> +/*
> + * File operations
> + */
> +static int emmaprp_open(struct file *file)
> +{
> + struct emmaprp_dev *pcdev = video_drvdata(file);
> + struct emmaprp_ctx *ctx;
> +
> + ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
> + if (!ctx)
> + return -ENOMEM;
> +
> + file->private_data = ctx;
> + ctx->dev = pcdev;
> +
> + ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx,&queue_init);
> +
> + if (IS_ERR(ctx->m2m_ctx)) {
> + int ret = PTR_ERR(ctx->m2m_ctx);
> +
> + kfree(ctx);
> + return ret;
> + }
> +
> + clk_enable(pcdev->clk_emma);
> + ctx->q_data[V4L2_M2M_SRC].fmt =&formats[1];
> + ctx->q_data[V4L2_M2M_DST].fmt =&formats[0];
> +
> + dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
> +
> + return 0;
> +}
> +
> +static int emmaprp_release(struct file *file)
> +{
> + struct emmaprp_dev *pcdev = video_drvdata(file);
> + struct emmaprp_ctx *ctx = file->private_data;
> +
> + dprintk(pcdev, "Releasing instance %p\n", ctx);
> +
> + clk_disable(pcdev->clk_emma);
> + v4l2_m2m_ctx_release(ctx->m2m_ctx);
> + kfree(ctx);
> +
> + return 0;
> +}
> +
> +static unsigned int emmaprp_poll(struct file *file,
> + struct poll_table_struct *wait)
> +{
> + struct emmaprp_ctx *ctx = file->private_data;
> +
> + return v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
> +}
> +
> +static int emmaprp_mmap(struct file *file, struct vm_area_struct *vma)
> +{
> + struct emmaprp_ctx *ctx = file->private_data;
> +
> + return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
> +}
> +
> +static const struct v4l2_file_operations emmaprp_fops = {
> + .owner = THIS_MODULE,
> + .open = emmaprp_open,
> + .release = emmaprp_release,
> + .poll = emmaprp_poll,
> + .unlocked_ioctl = video_ioctl2,
> + .mmap = emmaprp_mmap,
> +};
> +
> +static struct video_device emmaprp_videodev = {
> + .name = MEM2MEM_NAME,
> + .fops =&emmaprp_fops,
> + .ioctl_ops =&emmaprp_ioctl_ops,
> + .minor = -1,
> + .release = video_device_release,
> +};
> +
> +static struct v4l2_m2m_ops m2m_ops = {
> + .device_run = emmaprp_device_run,
> + .job_abort = emmaprp_job_abort,
> + .lock = emmaprp_lock,
> + .unlock = emmaprp_unlock,
> +};
> +
> +static int emmaprp_probe(struct platform_device *pdev)
> +{
> + struct emmaprp_dev *pcdev;
> + struct video_device *vfd;
> + struct resource *res_emma;
> + int irq_emma;
> + int ret;
> +
> + pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL);
> + if (!pcdev)
> + return -ENOMEM;
> +
> + spin_lock_init(&pcdev->irqlock);
> +
> + pcdev->clk_emma = clk_get(NULL, "emma");
> + if (IS_ERR(pcdev->clk_emma)) {
> + ret = PTR_ERR(pcdev->clk_emma);
> + goto free_dev;
> + }
> +
> + irq_emma = platform_get_irq(pdev, 0);
> + res_emma = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (irq_emma< 0 || res_emma == NULL) {
> + dev_err(&pdev->dev, "Missing platform resources data\n");
> + ret = -ENODEV;
> + goto free_clk;
> + }
> +
> + ret = v4l2_device_register(&pdev->dev,&pcdev->v4l2_dev);
> + if (ret)
> + goto free_clk;
> +
> + mutex_init(&pcdev->dev_mutex);
> +
> + vfd = video_device_alloc();
> + if (!vfd) {
> + v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
> + ret = -ENOMEM;
> + goto unreg_dev;
> + }
> +
> + *vfd = emmaprp_videodev;
> + vfd->lock =&pcdev->dev_mutex;
> +
> + video_set_drvdata(vfd, pcdev);
> + snprintf(vfd->name, sizeof(vfd->name), "%s", emmaprp_videodev.name);
> + pcdev->vfd = vfd;
> + v4l2_info(&pcdev->v4l2_dev, EMMAPRP_MODULE_NAME
> + " Device registered as /dev/video%d\n", vfd->num);
> +
> + platform_set_drvdata(pdev, pcdev);
> +
> + if (!request_mem_region(res_emma->start, resource_size(res_emma),
> + MEM2MEM_NAME)) {
> + ret = -EBUSY;
> + goto rel_vdev;
> + }
> +
> + pcdev->base_emma = ioremap(res_emma->start, resource_size(res_emma));
> + if (!pcdev->base_emma) {
> + ret = -ENOMEM;
> + goto rel_mem;
> + }
> + pcdev->irq_emma = irq_emma;
> + pcdev->res_emma = res_emma;
> +
> + ret = request_irq(pcdev->irq_emma, emmaprp_irq, 0,
> + MEM2MEM_NAME, pcdev);
> + if (ret)
> + goto rel_map;
> +
> +
> + pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
> + if (IS_ERR(pcdev->alloc_ctx)) {
> + v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
> + ret = PTR_ERR(pcdev->alloc_ctx);
> + goto rel_irq;
> + }
> +
> + pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
> + if (IS_ERR(pcdev->m2m_dev)) {
> + v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
> + ret = PTR_ERR(pcdev->m2m_dev);
> + goto rel_ctx;
> + }
> +
> + ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
> + if (ret) {
> + v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
> + goto rel_m2m;
> + }
> +
> + return 0;
> +
> +
> +rel_m2m:
> + v4l2_m2m_release(pcdev->m2m_dev);
> +rel_ctx:
> + vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
> +rel_irq:
> + free_irq(pcdev->irq_emma, pcdev);
> +rel_map:
> + iounmap(pcdev->base_emma);
> +rel_mem:
> + release_mem_region(res_emma->start, resource_size(res_emma));
> +rel_vdev:
> + video_device_release(vfd);
> +unreg_dev:
> + v4l2_device_unregister(&pcdev->v4l2_dev);
> +free_clk:
> + clk_put(pcdev->clk_emma);
> +free_dev:
> + kfree(pcdev);
> +
> + return ret;
> +}
> +
> +static int emmaprp_remove(struct platform_device *pdev)
> +{
> + struct resource *res_emma;
> + struct emmaprp_dev *pcdev = platform_get_drvdata(pdev);
> +
> + v4l2_info(&pcdev->v4l2_dev, "Removing " EMMAPRP_MODULE_NAME);
> +
> + video_unregister_device(pcdev->vfd);
> + v4l2_m2m_release(pcdev->m2m_dev);
> + vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
> + free_irq(pcdev->irq_emma, pcdev);
> + iounmap(pcdev->base_emma);
> +
> + res_emma = pcdev->res_emma;
> + release_mem_region(res_emma->start, resource_size(res_emma));
> +
> + v4l2_device_unregister(&pcdev->v4l2_dev);
> + clk_put(pcdev->clk_emma);
> + kfree(pcdev);
> +
> + return 0;
> +}
> +
> +static struct platform_driver emmaprp_pdrv = {
> + .probe = emmaprp_probe,
> + .remove = emmaprp_remove,
> + .driver = {
> + .name = MEM2MEM_NAME,
> + .owner = THIS_MODULE,
> + },
> +};
> +
> +static void __exit emmaprp_exit(void)
> +{
> + platform_driver_unregister(&emmaprp_pdrv);
> +}
> +
> +static int __init emmaprp_init(void)
> +{
> + return platform_driver_register(&emmaprp_pdrv);
> +}
> +
> +module_init(emmaprp_init);
> +module_exit(emmaprp_exit);
> +
This extra empty line triggers "new blank line at EOF" warning with git am.
Otherwise the patch looks good to me. Feel free to stick my:
Reviewed-by: Sylwester Nawrocki <s.nawro...@samsung.com>
--
Thanks,
Sylwester
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