drivers/gpu/drm/sun4i/sun8i_ui_layer.c

   1 /*
   2  * Copyright (C) Icenowy Zheng <icenowy@aosc.io>
   3  *
   4  * Based on sun4i_layer.h, which is:
   5  *   Copyright (C) 2015 Free Electrons
   6  *   Copyright (C) 2015 NextThing Co
   7  *
   8  *   Maxime Ripard <maxime.ripard@free-electrons.com>
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  */
  15
  16 #include <drm/drm_atomic.h>
  17 #include <drm/drm_atomic_helper.h>
  18 #include <drm/drm_crtc.h>
  19 #include <drm/drm_crtc_helper.h>
  20 #include <drm/drm_fb_cma_helper.h>
  21 #include <drm/drm_gem_cma_helper.h>
  22 #include <drm/drm_plane_helper.h>
  23 #include <drm/drmP.h>
  24
  25 #include "sun8i_ui_layer.h"
  26 #include "sun8i_mixer.h"
  27 #include "sun8i_ui_scaler.h"
  28
  29 static void sun8i_ui_layer_enable(struct sun8i_mixer *mixer, int channel,
  30                                   int overlay, bool enable)
  31 {
  32         u32 val;
  33
  34         DRM_DEBUG_DRIVER("%sabling channel %d overlay %d\n",
  35                          enable ? "En" : "Dis", channel, overlay);
  36
  37         if (enable)
  38                 val = SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN;
  39         else
  40                 val = 0;
  41
  42         regmap_update_bits(mixer->engine.regs,
  43                            SUN8I_MIXER_CHAN_UI_LAYER_ATTR(channel, overlay),
  44                            SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN, val);
  45
  46         if (enable)
  47                 val = SUN8I_MIXER_BLEND_PIPE_CTL_EN(channel);
  48         else
  49                 val = 0;
  50
  51         regmap_update_bits(mixer->engine.regs,
  52                            SUN8I_MIXER_BLEND_PIPE_CTL,
  53                            SUN8I_MIXER_BLEND_PIPE_CTL_EN(channel), val);
  54 }
  55
  56 static int sun8i_ui_layer_update_coord(struct sun8i_mixer *mixer, int channel,
  57                                        int overlay, struct drm_plane *plane)
  58 {
  59         struct drm_plane_state *state = plane->state;
  60         u32 src_w, src_h, dst_w, dst_h;
  61         u32 outsize, insize;
  62         u32 hphase, vphase;
  63
  64         DRM_DEBUG_DRIVER("Updating UI channel %d overlay %d\n",
  65                          channel, overlay);
  66
  67         src_w = drm_rect_width(&state->src) >> 16;
  68         src_h = drm_rect_height(&state->src) >> 16;
  69         dst_w = drm_rect_width(&state->dst);
  70         dst_h = drm_rect_height(&state->dst);
  71
  72         hphase = state->src.x1 & 0xffff;
  73         vphase = state->src.y1 & 0xffff;
  74
  75         insize = SUN8I_MIXER_SIZE(src_w, src_h);
  76         outsize = SUN8I_MIXER_SIZE(dst_w, dst_h);
  77
  78         if (plane->type == DRM_PLANE_TYPE_PRIMARY) {
  79                 bool interlaced = false;
  80                 u32 val;
  81
  82                 DRM_DEBUG_DRIVER("Primary layer, updating global size W: %u H: %u\n",
  83                                  dst_w, dst_h);
  84                 regmap_write(mixer->engine.regs,
  85                              SUN8I_MIXER_GLOBAL_SIZE,
  86                              outsize);
  87                 regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_OUTSIZE,
  88                              outsize);
  89
  90                 if (state->crtc)
  91                         interlaced = state->crtc->state->adjusted_mode.flags
  92                                 & DRM_MODE_FLAG_INTERLACE;
  93
  94                 if (interlaced)
  95                         val = SUN8I_MIXER_BLEND_OUTCTL_INTERLACED;
  96                 else
  97                         val = 0;
  98
  99                 regmap_update_bits(mixer->engine.regs,
 100                                    SUN8I_MIXER_BLEND_OUTCTL,
 101                                    SUN8I_MIXER_BLEND_OUTCTL_INTERLACED,
 102                                    val);
 103
 104                 DRM_DEBUG_DRIVER("Switching display mixer interlaced mode %s\n",
 105                                  interlaced ? "on" : "off");
 106         }
 107
 108         /* Set height and width */
 109         DRM_DEBUG_DRIVER("Layer source offset X: %d Y: %d\n",
 110                          state->src.x1 >> 16, state->src.y1 >> 16);
 111         DRM_DEBUG_DRIVER("Layer source size W: %d H: %d\n", src_w, src_h);
 112         regmap_write(mixer->engine.regs,
 113                      SUN8I_MIXER_CHAN_UI_LAYER_SIZE(channel, overlay),
 114                      insize);
 115         regmap_write(mixer->engine.regs,
 116                      SUN8I_MIXER_CHAN_UI_OVL_SIZE(channel),
 117                      insize);
 118
 119         if (insize != outsize || hphase || vphase) {
 120                 u32 hscale, vscale;
 121
 122                 DRM_DEBUG_DRIVER("HW scaling is enabled\n");
 123
 124                 hscale = state->src_w / state->crtc_w;
 125                 vscale = state->src_h / state->crtc_h;
 126
 127                 sun8i_ui_scaler_setup(mixer, channel, src_w, src_h, dst_w,
 128                                       dst_h, hscale, vscale, hphase, vphase);
 129                 sun8i_ui_scaler_enable(mixer, channel, true);
 130         } else {
 131                 DRM_DEBUG_DRIVER("HW scaling is not needed\n");
 132                 sun8i_ui_scaler_enable(mixer, channel, false);
 133         }
 134
 135         /* Set base coordinates */
 136         DRM_DEBUG_DRIVER("Layer destination coordinates X: %d Y: %d\n",
 137                          state->dst.x1, state->dst.y1);
 138         DRM_DEBUG_DRIVER("Layer destination size W: %d H: %d\n", dst_w, dst_h);
 139         regmap_write(mixer->engine.regs,
 140                      SUN8I_MIXER_BLEND_ATTR_COORD(channel),
 141                      SUN8I_MIXER_COORD(state->dst.x1, state->dst.y1));
 142         regmap_write(mixer->engine.regs,
 143                      SUN8I_MIXER_BLEND_ATTR_INSIZE(channel),
 144                      outsize);
 145
 146         return 0;
 147 }
 148
 149 static int sun8i_ui_layer_update_formats(struct sun8i_mixer *mixer, int channel,
 150                                          int overlay, struct drm_plane *plane)
 151 {
 152         struct drm_plane_state *state = plane->state;
 153         const struct de2_fmt_info *fmt_info;
 154         u32 val;
 155
 156         fmt_info = sun8i_mixer_format_info(state->fb->format->format);
 157         if (!fmt_info || !fmt_info->rgb) {
 158                 DRM_DEBUG_DRIVER("Invalid format\n");
 159                 return -EINVAL;
 160         }
 161
 162         val = fmt_info->de2_fmt << SUN8I_MIXER_CHAN_UI_LAYER_ATTR_FBFMT_OFFSET;
 163         regmap_update_bits(mixer->engine.regs,
 164                            SUN8I_MIXER_CHAN_UI_LAYER_ATTR(channel, overlay),
 165                            SUN8I_MIXER_CHAN_UI_LAYER_ATTR_FBFMT_MASK, val);
 166
 167         return 0;
 168 }
 169
 170 static int sun8i_ui_layer_update_buffer(struct sun8i_mixer *mixer, int channel,
 171                                         int overlay, struct drm_plane *plane)
 172 {
 173         struct drm_plane_state *state = plane->state;
 174         struct drm_framebuffer *fb = state->fb;
 175         struct drm_gem_cma_object *gem;
 176         dma_addr_t paddr;
 177         int bpp;
 178
 179         /* Get the physical address of the buffer in memory */
 180         gem = drm_fb_cma_get_gem_obj(fb, 0);
 181
 182         DRM_DEBUG_DRIVER("Using GEM @ %pad\n", &gem->paddr);
 183
 184         /* Compute the start of the displayed memory */
 185         bpp = fb->format->cpp[0];
 186         paddr = gem->paddr + fb->offsets[0];
 187
 188         /* Fixup framebuffer address for src coordinates */
 189         paddr += (state->src.x1 >> 16) * bpp;
 190         paddr += (state->src.y1 >> 16) * fb->pitches[0];
 191
 192         /* Set the line width */
 193         DRM_DEBUG_DRIVER("Layer line width: %d bytes\n", fb->pitches[0]);
 194         regmap_write(mixer->engine.regs,
 195                      SUN8I_MIXER_CHAN_UI_LAYER_PITCH(channel, overlay),
 196                      fb->pitches[0]);
 197
 198         DRM_DEBUG_DRIVER("Setting buffer address to %pad\n", &paddr);
 199
 200         regmap_write(mixer->engine.regs,
 201                      SUN8I_MIXER_CHAN_UI_LAYER_TOP_LADDR(channel, overlay),
 202                      lower_32_bits(paddr));
 203
 204         return 0;
 205 }
 206
 207 static int sun8i_ui_layer_atomic_check(struct drm_plane *plane,
 208                                        struct drm_plane_state *state)
 209 {
 210         struct sun8i_ui_layer *layer = plane_to_sun8i_ui_layer(plane);
 211         struct drm_crtc *crtc = state->crtc;
 212         struct drm_crtc_state *crtc_state;
 213         int min_scale, max_scale;
 214         struct drm_rect clip;
 215
 216         if (!crtc)
 217                 return 0;
 218
 219         crtc_state = drm_atomic_get_existing_crtc_state(state->state, crtc);
 220         if (WARN_ON(!crtc_state))
 221                 return -EINVAL;
 222
 223         clip.x1 = 0;
 224         clip.y1 = 0;
 225         clip.x2 = crtc_state->adjusted_mode.hdisplay;
 226         clip.y2 = crtc_state->adjusted_mode.vdisplay;
 227
 228         min_scale = DRM_PLANE_HELPER_NO_SCALING;
 229         max_scale = DRM_PLANE_HELPER_NO_SCALING;
 230
 231         if (layer->mixer->cfg->scaler_mask & BIT(layer->channel)) {
 232                 min_scale = SUN8I_UI_SCALER_SCALE_MIN;
 233                 max_scale = SUN8I_UI_SCALER_SCALE_MAX;
 234         }
 235
 236         return drm_atomic_helper_check_plane_state(state, crtc_state, &clip,
 237                                                    min_scale, max_scale,
 238                                                    true, true);
 239 }
 240
 241 static void sun8i_ui_layer_atomic_disable(struct drm_plane *plane,
 242                                           struct drm_plane_state *old_state)
 243 {
 244         struct sun8i_ui_layer *layer = plane_to_sun8i_ui_layer(plane);
 245         struct sun8i_mixer *mixer = layer->mixer;
 246
 247         sun8i_ui_layer_enable(mixer, layer->channel, layer->overlay, false);
 248 }
 249
 250 static void sun8i_ui_layer_atomic_update(struct drm_plane *plane,
 251                                          struct drm_plane_state *old_state)
 252 {
 253         struct sun8i_ui_layer *layer = plane_to_sun8i_ui_layer(plane);
 254         struct sun8i_mixer *mixer = layer->mixer;
 255
 256         if (!plane->state->visible) {
 257                 sun8i_ui_layer_enable(mixer, layer->channel,
 258                                       layer->overlay, false);
 259                 return;
 260         }
 261
 262         sun8i_ui_layer_update_coord(mixer, layer->channel,
 263                                     layer->overlay, plane);
 264         sun8i_ui_layer_update_formats(mixer, layer->channel,
 265                                       layer->overlay, plane);
 266         sun8i_ui_layer_update_buffer(mixer, layer->channel,
 267                                      layer->overlay, plane);
 268         sun8i_ui_layer_enable(mixer, layer->channel, layer->overlay, true);
 269 }
 270
 271 static struct drm_plane_helper_funcs sun8i_ui_layer_helper_funcs = {
 272         .atomic_check   = sun8i_ui_layer_atomic_check,
 273         .atomic_disable = sun8i_ui_layer_atomic_disable,
 274         .atomic_update  = sun8i_ui_layer_atomic_update,
 275 };
 276
 277 static const struct drm_plane_funcs sun8i_ui_layer_funcs = {
 278         .atomic_destroy_state   = drm_atomic_helper_plane_destroy_state,
 279         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 280         .destroy                = drm_plane_cleanup,
 281         .disable_plane          = drm_atomic_helper_disable_plane,
 282         .reset                  = drm_atomic_helper_plane_reset,
 283         .update_plane           = drm_atomic_helper_update_plane,
 284 };
 285
 286 static const u32 sun8i_ui_layer_formats[] = {
 287         DRM_FORMAT_ABGR1555,
 288         DRM_FORMAT_ABGR4444,
 289         DRM_FORMAT_ABGR8888,
 290         DRM_FORMAT_ARGB1555,
 291         DRM_FORMAT_ARGB4444,
 292         DRM_FORMAT_ARGB8888,
 293         DRM_FORMAT_BGR565,
 294         DRM_FORMAT_BGR888,
 295         DRM_FORMAT_BGRA5551,
 296         DRM_FORMAT_BGRA4444,
 297         DRM_FORMAT_BGRA8888,
 298         DRM_FORMAT_BGRX8888,
 299         DRM_FORMAT_RGB565,
 300         DRM_FORMAT_RGB888,
 301         DRM_FORMAT_RGBA4444,
 302         DRM_FORMAT_RGBA5551,
 303         DRM_FORMAT_RGBA8888,
 304         DRM_FORMAT_RGBX8888,
 305         DRM_FORMAT_XBGR8888,
 306         DRM_FORMAT_XRGB8888,
 307 };
 308
 309 struct sun8i_ui_layer *sun8i_ui_layer_init_one(struct drm_device *drm,
 310                                                struct sun8i_mixer *mixer,
 311                                                int index)
 312 {
 313         enum drm_plane_type type = DRM_PLANE_TYPE_OVERLAY;
 314         int channel = mixer->cfg->vi_num + index;
 315         struct sun8i_ui_layer *layer;
 316         int ret;
 317
 318         layer = devm_kzalloc(drm->dev, sizeof(*layer), GFP_KERNEL);
 319         if (!layer)
 320                 return ERR_PTR(-ENOMEM);
 321
 322         if (index == 0)
 323                 type = DRM_PLANE_TYPE_PRIMARY;
 324
 325         /* possible crtcs are set later */
 326         ret = drm_universal_plane_init(drm, &layer->plane, 0,
 327                                        &sun8i_ui_layer_funcs,
 328                                        sun8i_ui_layer_formats,
 329                                        ARRAY_SIZE(sun8i_ui_layer_formats),
 330                                        NULL, type, NULL);
 331         if (ret) {
 332                 dev_err(drm->dev, "Couldn't initialize layer\n");
 333                 return ERR_PTR(ret);
 334         }
 335
 336         /* fixed zpos for now */
 337         ret = drm_plane_create_zpos_immutable_property(&layer->plane, channel);
 338         if (ret) {
 339                 dev_err(drm->dev, "Couldn't add zpos property\n");
 340                 return ERR_PTR(ret);
 341         }
 342
 343         drm_plane_helper_add(&layer->plane, &sun8i_ui_layer_helper_funcs);
 344         layer->mixer = mixer;
 345         layer->channel = channel;
 346         layer->overlay = 0;
 347
 348         return layer;
 349 }