drivers/gpu/drm/shmobile/shmob_drm_kms.c

   1 /*
   2  * shmob_drm_kms.c  --  SH Mobile DRM Mode Setting
   3  *
   4  * Copyright (C) 2012 Renesas Electronics Corporation
   5  *
   6  * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <drm/drmP.h>
  15 #include <drm/drm_crtc.h>
  16 #include <drm/drm_crtc_helper.h>
  17 #include <drm/drm_fb_cma_helper.h>
  18 #include <drm/drm_gem_cma_helper.h>
  19 #include <drm/drm_gem_framebuffer_helper.h>
  20
  21 #include <video/sh_mobile_meram.h>
  22
  23 #include "shmob_drm_crtc.h"
  24 #include "shmob_drm_drv.h"
  25 #include "shmob_drm_kms.h"
  26 #include "shmob_drm_regs.h"
  27
  28 /* -----------------------------------------------------------------------------
  29  * Format helpers
  30  */
  31
  32 static const struct shmob_drm_format_info shmob_drm_format_infos[] = {
  33         {
  34                 .fourcc = DRM_FORMAT_RGB565,
  35                 .bpp = 16,
  36                 .yuv = false,
  37                 .lddfr = LDDFR_PKF_RGB16,
  38                 .meram = SH_MOBILE_MERAM_PF_RGB,
  39         }, {
  40                 .fourcc = DRM_FORMAT_RGB888,
  41                 .bpp = 24,
  42                 .yuv = false,
  43                 .lddfr = LDDFR_PKF_RGB24,
  44                 .meram = SH_MOBILE_MERAM_PF_RGB,
  45         }, {
  46                 .fourcc = DRM_FORMAT_ARGB8888,
  47                 .bpp = 32,
  48                 .yuv = false,
  49                 .lddfr = LDDFR_PKF_ARGB32,
  50                 .meram = SH_MOBILE_MERAM_PF_RGB,
  51         }, {
  52                 .fourcc = DRM_FORMAT_NV12,
  53                 .bpp = 12,
  54                 .yuv = true,
  55                 .lddfr = LDDFR_CC | LDDFR_YF_420,
  56                 .meram = SH_MOBILE_MERAM_PF_NV,
  57         }, {
  58                 .fourcc = DRM_FORMAT_NV21,
  59                 .bpp = 12,
  60                 .yuv = true,
  61                 .lddfr = LDDFR_CC | LDDFR_YF_420,
  62                 .meram = SH_MOBILE_MERAM_PF_NV,
  63         }, {
  64                 .fourcc = DRM_FORMAT_NV16,
  65                 .bpp = 16,
  66                 .yuv = true,
  67                 .lddfr = LDDFR_CC | LDDFR_YF_422,
  68                 .meram = SH_MOBILE_MERAM_PF_NV,
  69         }, {
  70                 .fourcc = DRM_FORMAT_NV61,
  71                 .bpp = 16,
  72                 .yuv = true,
  73                 .lddfr = LDDFR_CC | LDDFR_YF_422,
  74                 .meram = SH_MOBILE_MERAM_PF_NV,
  75         }, {
  76                 .fourcc = DRM_FORMAT_NV24,
  77                 .bpp = 24,
  78                 .yuv = true,
  79                 .lddfr = LDDFR_CC | LDDFR_YF_444,
  80                 .meram = SH_MOBILE_MERAM_PF_NV24,
  81         }, {
  82                 .fourcc = DRM_FORMAT_NV42,
  83                 .bpp = 24,
  84                 .yuv = true,
  85                 .lddfr = LDDFR_CC | LDDFR_YF_444,
  86                 .meram = SH_MOBILE_MERAM_PF_NV24,
  87         },
  88 };
  89
  90 const struct shmob_drm_format_info *shmob_drm_format_info(u32 fourcc)
  91 {
  92         unsigned int i;
  93
  94         for (i = 0; i < ARRAY_SIZE(shmob_drm_format_infos); ++i) {
  95                 if (shmob_drm_format_infos[i].fourcc == fourcc)
  96                         return &shmob_drm_format_infos[i];
  97         }
  98
  99         return NULL;
 100 }
 101
 102 /* -----------------------------------------------------------------------------
 103  * Frame buffer
 104  */
 105
 106 static struct drm_framebuffer *
 107 shmob_drm_fb_create(struct drm_device *dev, struct drm_file *file_priv,
 108                     const struct drm_mode_fb_cmd2 *mode_cmd)
 109 {
 110         const struct shmob_drm_format_info *format;
 111
 112         format = shmob_drm_format_info(mode_cmd->pixel_format);
 113         if (format == NULL) {
 114                 dev_dbg(dev->dev, "unsupported pixel format %08x\n",
 115                         mode_cmd->pixel_format);
 116                 return ERR_PTR(-EINVAL);
 117         }
 118
 119         if (mode_cmd->pitches[0] & 7 || mode_cmd->pitches[0] >= 65536) {
 120                 dev_dbg(dev->dev, "invalid pitch value %u\n",
 121                         mode_cmd->pitches[0]);
 122                 return ERR_PTR(-EINVAL);
 123         }
 124
 125         if (format->yuv) {
 126                 unsigned int chroma_cpp = format->bpp == 24 ? 2 : 1;
 127
 128                 if (mode_cmd->pitches[1] != mode_cmd->pitches[0] * chroma_cpp) {
 129                         dev_dbg(dev->dev,
 130                                 "luma and chroma pitches do not match\n");
 131                         return ERR_PTR(-EINVAL);
 132                 }
 133         }
 134
 135         return drm_gem_fb_create(dev, file_priv, mode_cmd);
 136 }
 137
 138 static const struct drm_mode_config_funcs shmob_drm_mode_config_funcs = {
 139         .fb_create = shmob_drm_fb_create,
 140 };
 141
 142 int shmob_drm_modeset_init(struct shmob_drm_device *sdev)
 143 {
 144         drm_mode_config_init(sdev->ddev);
 145
 146         shmob_drm_crtc_create(sdev);
 147         shmob_drm_encoder_create(sdev);
 148         shmob_drm_connector_create(sdev, &sdev->encoder.encoder);
 149
 150         drm_kms_helper_poll_init(sdev->ddev);
 151
 152         sdev->ddev->mode_config.min_width = 0;
 153         sdev->ddev->mode_config.min_height = 0;
 154         sdev->ddev->mode_config.max_width = 4095;
 155         sdev->ddev->mode_config.max_height = 4095;
 156         sdev->ddev->mode_config.funcs = &shmob_drm_mode_config_funcs;
 157
 158         drm_helper_disable_unused_functions(sdev->ddev);
 159
 160         return 0;
 161 }