drivers/gpu/drm/rcar-du/rcar_du_kms.c

   1 /*
   2  * rcar_du_kms.c  --  R-Car Display Unit Mode Setting
   3  *
   4  * Copyright (C) 2013 Renesas Corporation
   5  *
   6  * Contact: 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
  20 #include "rcar_du_crtc.h"
  21 #include "rcar_du_drv.h"
  22 #include "rcar_du_kms.h"
  23 #include "rcar_du_lvds.h"
  24 #include "rcar_du_regs.h"
  25 #include "rcar_du_vga.h"
  26
  27 /* -----------------------------------------------------------------------------
  28  * Format helpers
  29  */
  30
  31 static const struct rcar_du_format_info rcar_du_format_infos[] = {
  32         {
  33                 .fourcc = DRM_FORMAT_RGB565,
  34                 .bpp = 16,
  35                 .planes = 1,
  36                 .pnmr = PnMR_SPIM_TP | PnMR_DDDF_16BPP,
  37                 .edf = PnDDCR4_EDF_NONE,
  38         }, {
  39                 .fourcc = DRM_FORMAT_ARGB1555,
  40                 .bpp = 16,
  41                 .planes = 1,
  42                 .pnmr = PnMR_SPIM_ALP | PnMR_DDDF_ARGB,
  43                 .edf = PnDDCR4_EDF_NONE,
  44         }, {
  45                 .fourcc = DRM_FORMAT_XRGB1555,
  46                 .bpp = 16,
  47                 .planes = 1,
  48                 .pnmr = PnMR_SPIM_ALP | PnMR_DDDF_ARGB,
  49                 .edf = PnDDCR4_EDF_NONE,
  50         }, {
  51                 .fourcc = DRM_FORMAT_XRGB8888,
  52                 .bpp = 32,
  53                 .planes = 1,
  54                 .pnmr = PnMR_SPIM_TP | PnMR_DDDF_16BPP,
  55                 .edf = PnDDCR4_EDF_RGB888,
  56         }, {
  57                 .fourcc = DRM_FORMAT_ARGB8888,
  58                 .bpp = 32,
  59                 .planes = 1,
  60                 .pnmr = PnMR_SPIM_ALP | PnMR_DDDF_16BPP,
  61                 .edf = PnDDCR4_EDF_ARGB8888,
  62         }, {
  63                 .fourcc = DRM_FORMAT_UYVY,
  64                 .bpp = 16,
  65                 .planes = 1,
  66                 .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
  67                 .edf = PnDDCR4_EDF_NONE,
  68         }, {
  69                 .fourcc = DRM_FORMAT_YUYV,
  70                 .bpp = 16,
  71                 .planes = 1,
  72                 .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
  73                 .edf = PnDDCR4_EDF_NONE,
  74         }, {
  75                 .fourcc = DRM_FORMAT_NV12,
  76                 .bpp = 12,
  77                 .planes = 2,
  78                 .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
  79                 .edf = PnDDCR4_EDF_NONE,
  80         }, {
  81                 .fourcc = DRM_FORMAT_NV21,
  82                 .bpp = 12,
  83                 .planes = 2,
  84                 .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
  85                 .edf = PnDDCR4_EDF_NONE,
  86         }, {
  87                 /* In YUV 4:2:2, only NV16 is supported (NV61 isn't) */
  88                 .fourcc = DRM_FORMAT_NV16,
  89                 .bpp = 16,
  90                 .planes = 2,
  91                 .pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
  92                 .edf = PnDDCR4_EDF_NONE,
  93         },
  94 };
  95
  96 const struct rcar_du_format_info *rcar_du_format_info(u32 fourcc)
  97 {
  98         unsigned int i;
  99
 100         for (i = 0; i < ARRAY_SIZE(rcar_du_format_infos); ++i) {
 101                 if (rcar_du_format_infos[i].fourcc == fourcc)
 102                         return &rcar_du_format_infos[i];
 103         }
 104
 105         return NULL;
 106 }
 107
 108 /* -----------------------------------------------------------------------------
 109  * Common connector and encoder functions
 110  */
 111
 112 struct drm_encoder *
 113 rcar_du_connector_best_encoder(struct drm_connector *connector)
 114 {
 115         struct rcar_du_connector *rcon = to_rcar_connector(connector);
 116
 117         return &rcon->encoder->encoder;
 118 }
 119
 120 void rcar_du_encoder_mode_prepare(struct drm_encoder *encoder)
 121 {
 122 }
 123
 124 void rcar_du_encoder_mode_set(struct drm_encoder *encoder,
 125                               struct drm_display_mode *mode,
 126                               struct drm_display_mode *adjusted_mode)
 127 {
 128         struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
 129
 130         rcar_du_crtc_route_output(encoder->crtc, renc->output);
 131 }
 132
 133 void rcar_du_encoder_mode_commit(struct drm_encoder *encoder)
 134 {
 135 }
 136
 137 /* -----------------------------------------------------------------------------
 138  * Frame buffer
 139  */
 140
 141 int rcar_du_dumb_create(struct drm_file *file, struct drm_device *dev,
 142                         struct drm_mode_create_dumb *args)
 143 {
 144         unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
 145         unsigned int align;
 146
 147         /* The pitch must be aligned to a 16 pixels boundary. */
 148         align = 16 * args->bpp / 8;
 149         args->pitch = roundup(max(args->pitch, min_pitch), align);
 150
 151         return drm_gem_cma_dumb_create(file, dev, args);
 152 }
 153
 154 static struct drm_framebuffer *
 155 rcar_du_fb_create(struct drm_device *dev, struct drm_file *file_priv,
 156                   struct drm_mode_fb_cmd2 *mode_cmd)
 157 {
 158         const struct rcar_du_format_info *format;
 159         unsigned int align;
 160
 161         format = rcar_du_format_info(mode_cmd->pixel_format);
 162         if (format == NULL) {
 163                 dev_dbg(dev->dev, "unsupported pixel format %08x\n",
 164                         mode_cmd->pixel_format);
 165                 return ERR_PTR(-EINVAL);
 166         }
 167
 168         align = 16 * format->bpp / 8;
 169
 170         if (mode_cmd->pitches[0] & (align - 1) ||
 171             mode_cmd->pitches[0] >= 8192) {
 172                 dev_dbg(dev->dev, "invalid pitch value %u\n",
 173                         mode_cmd->pitches[0]);
 174                 return ERR_PTR(-EINVAL);
 175         }
 176
 177         if (format->planes == 2) {
 178                 if (mode_cmd->pitches[1] != mode_cmd->pitches[0]) {
 179                         dev_dbg(dev->dev,
 180                                 "luma and chroma pitches do not match\n");
 181                         return ERR_PTR(-EINVAL);
 182                 }
 183         }
 184
 185         return drm_fb_cma_create(dev, file_priv, mode_cmd);
 186 }
 187
 188 static const struct drm_mode_config_funcs rcar_du_mode_config_funcs = {
 189         .fb_create = rcar_du_fb_create,
 190 };
 191
 192 int rcar_du_modeset_init(struct rcar_du_device *rcdu)
 193 {
 194         struct drm_device *dev = rcdu->ddev;
 195         struct drm_encoder *encoder;
 196         unsigned int i;
 197         int ret;
 198
 199         drm_mode_config_init(rcdu->ddev);
 200
 201         rcdu->ddev->mode_config.min_width = 0;
 202         rcdu->ddev->mode_config.min_height = 0;
 203         rcdu->ddev->mode_config.max_width = 4095;
 204         rcdu->ddev->mode_config.max_height = 2047;
 205         rcdu->ddev->mode_config.funcs = &rcar_du_mode_config_funcs;
 206
 207         ret = rcar_du_plane_init(rcdu);
 208         if (ret < 0)
 209                 return ret;
 210
 211         for (i = 0; i < ARRAY_SIZE(rcdu->crtcs); ++i) {
 212                 ret = rcar_du_crtc_create(rcdu, i);
 213                 if (ret < 0)
 214                         return ret;
 215         }
 216
 217         rcdu->used_crtcs = 0;
 218         rcdu->num_crtcs = i;
 219
 220         for (i = 0; i < rcdu->pdata->num_encoders; ++i) {
 221                 const struct rcar_du_encoder_data *pdata =
 222                         &rcdu->pdata->encoders[i];
 223
 224                 if (pdata->output >= ARRAY_SIZE(rcdu->crtcs)) {
 225                         dev_warn(rcdu->dev,
 226                                  "encoder %u references unexisting output %u, skipping\n",
 227                                  i, pdata->output);
 228                         continue;
 229                 }
 230
 231                 switch (pdata->encoder) {
 232                 case RCAR_DU_ENCODER_VGA:
 233                         rcar_du_vga_init(rcdu, &pdata->u.vga, pdata->output);
 234                         break;
 235
 236                 case RCAR_DU_ENCODER_LVDS:
 237                         rcar_du_lvds_init(rcdu, &pdata->u.lvds, pdata->output);
 238                         break;
 239
 240                 default:
 241                         break;
 242                 }
 243         }
 244
 245         /* Set the possible CRTCs and possible clones. All encoders can be
 246          * driven by the CRTC associated with the output they're connected to,
 247          * as well as by CRTC 0.
 248          */
 249         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 250                 struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
 251
 252                 encoder->possible_crtcs = (1 << 0) | (1 << renc->output);
 253                 encoder->possible_clones = 1 << 0;
 254         }
 255
 256         ret = rcar_du_plane_register(rcdu);
 257         if (ret < 0)
 258                 return ret;
 259
 260         drm_kms_helper_poll_init(rcdu->ddev);
 261
 262         drm_helper_disable_unused_functions(rcdu->ddev);
 263
 264         return 0;
 265 }