drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h

   1 /*
   2  * Copyright (c) 2016 MediaTek Inc.
   3  * Author: Ming Hsiu Tsai <minghsiu.tsai@mediatek.com>
   4  *         Rick Chang <rick.chang@mediatek.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #ifndef _MTK_JPEG_CORE_H
  17 #define _MTK_JPEG_CORE_H
  18
  19 #include <linux/interrupt.h>
  20 #include <media/v4l2-ctrls.h>
  21 #include <media/v4l2-device.h>
  22 #include <media/v4l2-fh.h>
  23
  24 #define MTK_JPEG_NAME           "mtk-jpeg"
  25
  26 #define MTK_JPEG_FMT_FLAG_DEC_OUTPUT    BIT(0)
  27 #define MTK_JPEG_FMT_FLAG_DEC_CAPTURE   BIT(1)
  28
  29 #define MTK_JPEG_FMT_TYPE_OUTPUT        1
  30 #define MTK_JPEG_FMT_TYPE_CAPTURE       2
  31
  32 #define MTK_JPEG_MIN_WIDTH      32
  33 #define MTK_JPEG_MIN_HEIGHT     32
  34 #define MTK_JPEG_MAX_WIDTH      8192
  35 #define MTK_JPEG_MAX_HEIGHT     8192
  36
  37 #define MTK_JPEG_DEFAULT_SIZEIMAGE      (1 * 1024 * 1024)
  38
  39 enum mtk_jpeg_ctx_state {
  40         MTK_JPEG_INIT = 0,
  41         MTK_JPEG_RUNNING,
  42         MTK_JPEG_SOURCE_CHANGE,
  43 };
  44
  45 /**
  46  * struct mt_jpeg - JPEG IP abstraction
  47  * @lock:               the mutex protecting this structure
  48  * @hw_lock:            spinlock protecting the hw device resource
  49  * @workqueue:          decode work queue
  50  * @dev:                JPEG device
  51  * @v4l2_dev:           v4l2 device for mem2mem mode
  52  * @m2m_dev:            v4l2 mem2mem device data
  53  * @alloc_ctx:          videobuf2 memory allocator's context
  54  * @dec_vdev:           video device node for decoder mem2mem mode
  55  * @dec_reg_base:       JPEG registers mapping
  56  * @clk_jdec:           JPEG hw working clock
  57  * @clk_jdec_smi:       JPEG SMI bus clock
  58  * @larb:               SMI device
  59  */
  60 struct mtk_jpeg_dev {
  61         struct mutex            lock;
  62         spinlock_t              hw_lock;
  63         struct workqueue_struct *workqueue;
  64         struct device           *dev;
  65         struct v4l2_device      v4l2_dev;
  66         struct v4l2_m2m_dev     *m2m_dev;
  67         void                    *alloc_ctx;
  68         struct video_device     *dec_vdev;
  69         void __iomem            *dec_reg_base;
  70         struct clk              *clk_jdec;
  71         struct clk              *clk_jdec_smi;
  72         struct device           *larb;
  73 };
  74
  75 /**
  76  * struct jpeg_fmt - driver's internal color format data
  77  * @fourcc:     the fourcc code, 0 if not applicable
  78  * @h_sample:   horizontal sample count of plane in 4 * 4 pixel image
  79  * @v_sample:   vertical sample count of plane in 4 * 4 pixel image
  80  * @colplanes:  number of color planes (1 for packed formats)
  81  * @h_align:    horizontal alignment order (align to 2^h_align)
  82  * @v_align:    vertical alignment order (align to 2^v_align)
  83  * @flags:      flags describing format applicability
  84  */
  85 struct mtk_jpeg_fmt {
  86         u32     fourcc;
  87         int     h_sample[VIDEO_MAX_PLANES];
  88         int     v_sample[VIDEO_MAX_PLANES];
  89         int     colplanes;
  90         int     h_align;
  91         int     v_align;
  92         u32     flags;
  93 };
  94
  95 /**
  96  * mtk_jpeg_q_data - parameters of one queue
  97  * @fmt:          driver-specific format of this queue
  98  * @w:            image width
  99  * @h:            image height
 100  * @bytesperline: distance in bytes between the leftmost pixels in two adjacent
 101  *                lines
 102  * @sizeimage:    image buffer size in bytes
 103  */
 104 struct mtk_jpeg_q_data {
 105         struct mtk_jpeg_fmt     *fmt;
 106         u32                     w;
 107         u32                     h;
 108         u32                     bytesperline[VIDEO_MAX_PLANES];
 109         u32                     sizeimage[VIDEO_MAX_PLANES];
 110 };
 111
 112 /**
 113  * mtk_jpeg_ctx - the device context data
 114  * @jpeg:               JPEG IP device for this context
 115  * @out_q:              source (output) queue information
 116  * @cap_q:              destination (capture) queue queue information
 117  * @fh:                 V4L2 file handle
 118  * @dec_param           parameters for HW decoding
 119  * @state:              state of the context
 120  * @header_valid:       set if header has been parsed and valid
 121  * @colorspace: enum v4l2_colorspace; supplemental to pixelformat
 122  * @ycbcr_enc: enum v4l2_ycbcr_encoding, Y'CbCr encoding
 123  * @quantization: enum v4l2_quantization, colorspace quantization
 124  * @xfer_func: enum v4l2_xfer_func, colorspace transfer function
 125  */
 126 struct mtk_jpeg_ctx {
 127         struct mtk_jpeg_dev             *jpeg;
 128         struct mtk_jpeg_q_data          out_q;
 129         struct mtk_jpeg_q_data          cap_q;
 130         struct v4l2_fh                  fh;
 131         enum mtk_jpeg_ctx_state         state;
 132
 133         enum v4l2_colorspace colorspace;
 134         enum v4l2_ycbcr_encoding ycbcr_enc;
 135         enum v4l2_quantization quantization;
 136         enum v4l2_xfer_func xfer_func;
 137 };
 138
 139 #endif /* _MTK_JPEG_CORE_H */