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1009 lines
25 KiB
C
1009 lines
25 KiB
C
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/*
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* Support eMMa-PrP through mem2mem framework.
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*
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* eMMa-PrP is a piece of HW that allows fetching buffers
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* from one memory location and do several operations on
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* them such as scaling or format conversion giving, as a result
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* a new processed buffer in another memory location.
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*
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* Based on mem2mem_testdev.c by Pawel Osciak.
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*
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* Copyright (c) 2011 Vista Silicon S.L.
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* Javier Martin <javier.martin@vista-silicon.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version
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*/
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#include <linux/module.h>
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#include <linux/clk.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <media/v4l2-mem2mem.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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#include <media/videobuf2-dma-contig.h>
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#include <asm/sizes.h>
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#define EMMAPRP_MODULE_NAME "mem2mem-emmaprp"
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MODULE_DESCRIPTION("Mem-to-mem device which supports eMMa-PrP present in mx2 SoCs");
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MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
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MODULE_LICENSE("GPL");
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MODULE_VERSION("0.0.1");
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static bool debug;
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module_param(debug, bool, 0644);
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#define MIN_W 32
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#define MIN_H 32
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#define MAX_W 2040
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#define MAX_H 2046
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#define S_ALIGN 1 /* multiple of 2 */
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#define W_ALIGN_YUV420 3 /* multiple of 8 */
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#define W_ALIGN_OTHERS 2 /* multiple of 4 */
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#define H_ALIGN 1 /* multiple of 2 */
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/* Flags that indicate a format can be used for capture/output */
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#define MEM2MEM_CAPTURE (1 << 0)
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#define MEM2MEM_OUTPUT (1 << 1)
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#define MEM2MEM_NAME "m2m-emmaprp"
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/* In bytes, per queue */
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#define MEM2MEM_VID_MEM_LIMIT SZ_16M
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#define dprintk(dev, fmt, arg...) \
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v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
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/* EMMA PrP */
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#define PRP_CNTL 0x00
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#define PRP_INTR_CNTL 0x04
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#define PRP_INTRSTATUS 0x08
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#define PRP_SOURCE_Y_PTR 0x0c
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#define PRP_SOURCE_CB_PTR 0x10
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#define PRP_SOURCE_CR_PTR 0x14
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#define PRP_DEST_RGB1_PTR 0x18
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#define PRP_DEST_RGB2_PTR 0x1c
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#define PRP_DEST_Y_PTR 0x20
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#define PRP_DEST_CB_PTR 0x24
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#define PRP_DEST_CR_PTR 0x28
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#define PRP_SRC_FRAME_SIZE 0x2c
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#define PRP_DEST_CH1_LINE_STRIDE 0x30
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#define PRP_SRC_PIXEL_FORMAT_CNTL 0x34
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#define PRP_CH1_PIXEL_FORMAT_CNTL 0x38
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#define PRP_CH1_OUT_IMAGE_SIZE 0x3c
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#define PRP_CH2_OUT_IMAGE_SIZE 0x40
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#define PRP_SRC_LINE_STRIDE 0x44
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#define PRP_CSC_COEF_012 0x48
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#define PRP_CSC_COEF_345 0x4c
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#define PRP_CSC_COEF_678 0x50
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#define PRP_CH1_RZ_HORI_COEF1 0x54
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#define PRP_CH1_RZ_HORI_COEF2 0x58
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#define PRP_CH1_RZ_HORI_VALID 0x5c
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#define PRP_CH1_RZ_VERT_COEF1 0x60
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#define PRP_CH1_RZ_VERT_COEF2 0x64
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#define PRP_CH1_RZ_VERT_VALID 0x68
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#define PRP_CH2_RZ_HORI_COEF1 0x6c
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#define PRP_CH2_RZ_HORI_COEF2 0x70
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#define PRP_CH2_RZ_HORI_VALID 0x74
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#define PRP_CH2_RZ_VERT_COEF1 0x78
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#define PRP_CH2_RZ_VERT_COEF2 0x7c
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#define PRP_CH2_RZ_VERT_VALID 0x80
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#define PRP_CNTL_CH1EN (1 << 0)
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#define PRP_CNTL_CH2EN (1 << 1)
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#define PRP_CNTL_CSIEN (1 << 2)
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#define PRP_CNTL_DATA_IN_YUV420 (0 << 3)
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#define PRP_CNTL_DATA_IN_YUV422 (1 << 3)
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#define PRP_CNTL_DATA_IN_RGB16 (2 << 3)
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#define PRP_CNTL_DATA_IN_RGB32 (3 << 3)
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#define PRP_CNTL_CH1_OUT_RGB8 (0 << 5)
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#define PRP_CNTL_CH1_OUT_RGB16 (1 << 5)
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#define PRP_CNTL_CH1_OUT_RGB32 (2 << 5)
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#define PRP_CNTL_CH1_OUT_YUV422 (3 << 5)
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#define PRP_CNTL_CH2_OUT_YUV420 (0 << 7)
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#define PRP_CNTL_CH2_OUT_YUV422 (1 << 7)
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#define PRP_CNTL_CH2_OUT_YUV444 (2 << 7)
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#define PRP_CNTL_CH1_LEN (1 << 9)
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#define PRP_CNTL_CH2_LEN (1 << 10)
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#define PRP_CNTL_SKIP_FRAME (1 << 11)
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#define PRP_CNTL_SWRST (1 << 12)
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#define PRP_CNTL_CLKEN (1 << 13)
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#define PRP_CNTL_WEN (1 << 14)
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#define PRP_CNTL_CH1BYP (1 << 15)
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#define PRP_CNTL_IN_TSKIP(x) ((x) << 16)
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#define PRP_CNTL_CH1_TSKIP(x) ((x) << 19)
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#define PRP_CNTL_CH2_TSKIP(x) ((x) << 22)
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#define PRP_CNTL_INPUT_FIFO_LEVEL(x) ((x) << 25)
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#define PRP_CNTL_RZ_FIFO_LEVEL(x) ((x) << 27)
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#define PRP_CNTL_CH2B1EN (1 << 29)
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#define PRP_CNTL_CH2B2EN (1 << 30)
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#define PRP_CNTL_CH2FEN (1 << 31)
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#define PRP_SIZE_HEIGHT(x) (x)
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#define PRP_SIZE_WIDTH(x) ((x) << 16)
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/* IRQ Enable and status register */
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#define PRP_INTR_RDERR (1 << 0)
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#define PRP_INTR_CH1WERR (1 << 1)
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#define PRP_INTR_CH2WERR (1 << 2)
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#define PRP_INTR_CH1FC (1 << 3)
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#define PRP_INTR_CH2FC (1 << 5)
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#define PRP_INTR_LBOVF (1 << 7)
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#define PRP_INTR_CH2OVF (1 << 8)
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#define PRP_INTR_ST_RDERR (1 << 0)
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#define PRP_INTR_ST_CH1WERR (1 << 1)
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#define PRP_INTR_ST_CH2WERR (1 << 2)
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#define PRP_INTR_ST_CH2B2CI (1 << 3)
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#define PRP_INTR_ST_CH2B1CI (1 << 4)
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#define PRP_INTR_ST_CH1B2CI (1 << 5)
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#define PRP_INTR_ST_CH1B1CI (1 << 6)
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#define PRP_INTR_ST_LBOVF (1 << 7)
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#define PRP_INTR_ST_CH2OVF (1 << 8)
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struct emmaprp_fmt {
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char *name;
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u32 fourcc;
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/* Types the format can be used for */
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u32 types;
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};
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static struct emmaprp_fmt formats[] = {
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{
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.name = "YUV 4:2:0 Planar",
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.fourcc = V4L2_PIX_FMT_YUV420,
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.types = MEM2MEM_CAPTURE,
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},
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{
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.name = "4:2:2, packed, YUYV",
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.fourcc = V4L2_PIX_FMT_YUYV,
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.types = MEM2MEM_OUTPUT,
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},
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};
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/* Per-queue, driver-specific private data */
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struct emmaprp_q_data {
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unsigned int width;
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unsigned int height;
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unsigned int sizeimage;
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struct emmaprp_fmt *fmt;
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};
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enum {
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V4L2_M2M_SRC = 0,
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V4L2_M2M_DST = 1,
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};
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#define NUM_FORMATS ARRAY_SIZE(formats)
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static struct emmaprp_fmt *find_format(struct v4l2_format *f)
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{
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struct emmaprp_fmt *fmt;
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unsigned int k;
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for (k = 0; k < NUM_FORMATS; k++) {
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fmt = &formats[k];
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if (fmt->fourcc == f->fmt.pix.pixelformat)
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break;
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}
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if (k == NUM_FORMATS)
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return NULL;
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return &formats[k];
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}
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struct emmaprp_dev {
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struct v4l2_device v4l2_dev;
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struct video_device *vfd;
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struct mutex dev_mutex;
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spinlock_t irqlock;
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int irq_emma;
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void __iomem *base_emma;
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struct clk *clk_emma;
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struct resource *res_emma;
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struct v4l2_m2m_dev *m2m_dev;
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struct vb2_alloc_ctx *alloc_ctx;
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};
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struct emmaprp_ctx {
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struct emmaprp_dev *dev;
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/* Abort requested by m2m */
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int aborting;
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struct emmaprp_q_data q_data[2];
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struct v4l2_m2m_ctx *m2m_ctx;
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};
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static struct emmaprp_q_data *get_q_data(struct emmaprp_ctx *ctx,
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enum v4l2_buf_type type)
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{
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switch (type) {
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case V4L2_BUF_TYPE_VIDEO_OUTPUT:
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return &(ctx->q_data[V4L2_M2M_SRC]);
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case V4L2_BUF_TYPE_VIDEO_CAPTURE:
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return &(ctx->q_data[V4L2_M2M_DST]);
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default:
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BUG();
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}
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return NULL;
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}
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/*
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* mem2mem callbacks
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*/
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static void emmaprp_job_abort(void *priv)
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{
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struct emmaprp_ctx *ctx = priv;
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struct emmaprp_dev *pcdev = ctx->dev;
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ctx->aborting = 1;
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dprintk(pcdev, "Aborting task\n");
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v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
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}
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static void emmaprp_lock(void *priv)
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{
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struct emmaprp_ctx *ctx = priv;
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struct emmaprp_dev *pcdev = ctx->dev;
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mutex_lock(&pcdev->dev_mutex);
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}
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static void emmaprp_unlock(void *priv)
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{
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struct emmaprp_ctx *ctx = priv;
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struct emmaprp_dev *pcdev = ctx->dev;
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mutex_unlock(&pcdev->dev_mutex);
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}
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static inline void emmaprp_dump_regs(struct emmaprp_dev *pcdev)
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{
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dprintk(pcdev,
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"eMMa-PrP Registers:\n"
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" SOURCE_Y_PTR = 0x%08X\n"
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" SRC_FRAME_SIZE = 0x%08X\n"
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" DEST_Y_PTR = 0x%08X\n"
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" DEST_CR_PTR = 0x%08X\n"
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" DEST_CB_PTR = 0x%08X\n"
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" CH2_OUT_IMAGE_SIZE = 0x%08X\n"
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" CNTL = 0x%08X\n",
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readl(pcdev->base_emma + PRP_SOURCE_Y_PTR),
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readl(pcdev->base_emma + PRP_SRC_FRAME_SIZE),
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readl(pcdev->base_emma + PRP_DEST_Y_PTR),
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readl(pcdev->base_emma + PRP_DEST_CR_PTR),
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readl(pcdev->base_emma + PRP_DEST_CB_PTR),
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readl(pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE),
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readl(pcdev->base_emma + PRP_CNTL));
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}
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static void emmaprp_device_run(void *priv)
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{
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struct emmaprp_ctx *ctx = priv;
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struct emmaprp_q_data *s_q_data, *d_q_data;
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struct vb2_buffer *src_buf, *dst_buf;
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struct emmaprp_dev *pcdev = ctx->dev;
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unsigned int s_width, s_height;
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unsigned int d_width, d_height;
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unsigned int d_size;
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dma_addr_t p_in, p_out;
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u32 tmp;
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src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
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dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
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s_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
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s_width = s_q_data->width;
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s_height = s_q_data->height;
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d_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
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d_width = d_q_data->width;
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d_height = d_q_data->height;
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d_size = d_width * d_height;
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p_in = vb2_dma_contig_plane_dma_addr(src_buf, 0);
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p_out = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
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if (!p_in || !p_out) {
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v4l2_err(&pcdev->v4l2_dev,
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"Acquiring kernel pointers to buffers failed\n");
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return;
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}
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/* Input frame parameters */
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writel(p_in, pcdev->base_emma + PRP_SOURCE_Y_PTR);
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writel(PRP_SIZE_WIDTH(s_width) | PRP_SIZE_HEIGHT(s_height),
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pcdev->base_emma + PRP_SRC_FRAME_SIZE);
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/* Output frame parameters */
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writel(p_out, pcdev->base_emma + PRP_DEST_Y_PTR);
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writel(p_out + d_size, pcdev->base_emma + PRP_DEST_CB_PTR);
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writel(p_out + d_size + (d_size >> 2),
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pcdev->base_emma + PRP_DEST_CR_PTR);
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writel(PRP_SIZE_WIDTH(d_width) | PRP_SIZE_HEIGHT(d_height),
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pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE);
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/* IRQ configuration */
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tmp = readl(pcdev->base_emma + PRP_INTR_CNTL);
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writel(tmp | PRP_INTR_RDERR |
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PRP_INTR_CH2WERR |
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PRP_INTR_CH2FC,
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pcdev->base_emma + PRP_INTR_CNTL);
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emmaprp_dump_regs(pcdev);
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/* Enable transfer */
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tmp = readl(pcdev->base_emma + PRP_CNTL);
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writel(tmp | PRP_CNTL_CH2_OUT_YUV420 |
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PRP_CNTL_DATA_IN_YUV422 |
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PRP_CNTL_CH2EN,
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pcdev->base_emma + PRP_CNTL);
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}
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static irqreturn_t emmaprp_irq(int irq_emma, void *data)
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{
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struct emmaprp_dev *pcdev = data;
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struct emmaprp_ctx *curr_ctx;
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struct vb2_buffer *src_vb, *dst_vb;
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unsigned long flags;
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u32 irqst;
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/* Check irq flags and clear irq */
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irqst = readl(pcdev->base_emma + PRP_INTRSTATUS);
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writel(irqst, pcdev->base_emma + PRP_INTRSTATUS);
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dprintk(pcdev, "irqst = 0x%08x\n", irqst);
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curr_ctx = v4l2_m2m_get_curr_priv(pcdev->m2m_dev);
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if (curr_ctx == NULL) {
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pr_err("Instance released before the end of transaction\n");
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return IRQ_HANDLED;
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}
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if (!curr_ctx->aborting) {
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if ((irqst & PRP_INTR_ST_RDERR) ||
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||
|
(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);
|
||
|
} else if (irqst & PRP_INTR_ST_CH2B1CI) { /* buffer ready */
|
||
|
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);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
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->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];
|
||
|
strlcpy(f->description, fmt->name, sizeof(f->description) - 1);
|
||
|
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;
|
||
|
|
||
|
if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) {
|
||
|
v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
|
||
|
W_ALIGN_YUV420, &f->fmt.pix.height,
|
||
|
MIN_H, MAX_H, H_ALIGN, S_ALIGN);
|
||
|
f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
|
||
|
} else {
|
||
|
v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
|
||
|
W_ALIGN_OTHERS, &f->fmt.pix.height,
|
||
|
MIN_H, MAX_H, H_ALIGN, S_ALIGN);
|
||
|
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
|
||
|
*/
|
||
|
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(&pdev->dev, NULL);
|
||
|
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 (devm_request_mem_region(&pdev->dev, res_emma->start,
|
||
|
resource_size(res_emma), MEM2MEM_NAME) == NULL)
|
||
|
goto rel_vdev;
|
||
|
|
||
|
pcdev->base_emma = devm_ioremap(&pdev->dev, res_emma->start,
|
||
|
resource_size(res_emma));
|
||
|
if (!pcdev->base_emma)
|
||
|
goto rel_vdev;
|
||
|
|
||
|
pcdev->irq_emma = irq_emma;
|
||
|
pcdev->res_emma = res_emma;
|
||
|
|
||
|
if (devm_request_irq(&pdev->dev, pcdev->irq_emma, emmaprp_irq,
|
||
|
0, MEM2MEM_NAME, pcdev) < 0)
|
||
|
goto rel_vdev;
|
||
|
|
||
|
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_vdev;
|
||
|
}
|
||
|
|
||
|
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_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 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);
|
||
|
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);
|