drivers/gpu/drm/exynos/exynos_drm_plane.c

   1 /*
   2  * Copyright (C) 2011 Samsung Electronics Co.Ltd
   3  * Authors: Joonyoung Shim <jy0922.shim@samsung.com>
   4  *
   5  * This program is free software; you can redistribute  it and/or modify it
   6  * under  the terms of  the GNU General  Public License as published by the
   7  * Free Software Foundation;  either version 2 of the  License, or (at your
   8  * option) any later version.
   9  *
  10  */
  11
  12 #include <drm/drmP.h>
  13
  14 #include <drm/exynos_drm.h>
  15 #include "exynos_drm_drv.h"
  16 #include "exynos_drm_encoder.h"
  17 #include "exynos_drm_fb.h"
  18 #include "exynos_drm_gem.h"
  19
  20 #define to_exynos_plane(x)      container_of(x, struct exynos_plane, base)
  21
  22 struct exynos_plane {
  23         struct drm_plane                base;
  24         struct exynos_drm_overlay       overlay;
  25         bool                            enabled;
  26 };
  27
  28 static const uint32_t formats[] = {
  29         DRM_FORMAT_XRGB8888,
  30         DRM_FORMAT_ARGB8888,
  31         DRM_FORMAT_NV12,
  32         DRM_FORMAT_NV12MT,
  33 };
  34
  35 /*
  36  * This function is to get X or Y size shown via screen. This needs length and
  37  * start position of CRTC.
  38  *
  39  *      <--- length --->
  40  * CRTC ----------------
  41  *      ^ start        ^ end
  42  *
  43  * There are six cases from a to b.
  44  *
  45  *             <----- SCREEN ----->
  46  *             0                 last
  47  *   ----------|------------------|----------
  48  * CRTCs
  49  * a -------
  50  *        b -------
  51  *        c --------------------------
  52  *                 d --------
  53  *                           e -------
  54  *                                  f -------
  55  */
  56 static int exynos_plane_get_size(int start, unsigned length, unsigned last)
  57 {
  58         int end = start + length;
  59         int size = 0;
  60
  61         if (start <= 0) {
  62                 if (end > 0)
  63                         size = min_t(unsigned, end, last);
  64         } else if (start <= last) {
  65                 size = min_t(unsigned, last - start, length);
  66         }
  67
  68         return size;
  69 }
  70
  71 int exynos_plane_mode_set(struct drm_plane *plane, struct drm_crtc *crtc,
  72                           struct drm_framebuffer *fb, int crtc_x, int crtc_y,
  73                           unsigned int crtc_w, unsigned int crtc_h,
  74                           uint32_t src_x, uint32_t src_y,
  75                           uint32_t src_w, uint32_t src_h)
  76 {
  77         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
  78         struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
  79         unsigned int actual_w;
  80         unsigned int actual_h;
  81         int nr;
  82         int i;
  83
  84         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
  85
  86         nr = exynos_drm_fb_get_buf_cnt(fb);
  87         for (i = 0; i < nr; i++) {
  88                 struct exynos_drm_gem_buf *buffer = exynos_drm_fb_buffer(fb, i);
  89
  90                 if (!buffer) {
  91                         DRM_LOG_KMS("buffer is null\n");
  92                         return -EFAULT;
  93                 }
  94
  95                 overlay->dma_addr[i] = buffer->dma_addr;
  96                 overlay->vaddr[i] = buffer->kvaddr;
  97
  98                 DRM_DEBUG_KMS("buffer: %d, vaddr = 0x%lx, dma_addr = 0x%lx\n",
  99                                 i, (unsigned long)overlay->vaddr[i],
 100                                 (unsigned long)overlay->dma_addr[i]);
 101         }
 102
 103         actual_w = exynos_plane_get_size(crtc_x, crtc_w, crtc->mode.hdisplay);
 104         actual_h = exynos_plane_get_size(crtc_y, crtc_h, crtc->mode.vdisplay);
 105
 106         if (crtc_x < 0) {
 107                 if (actual_w)
 108                         src_x -= crtc_x;
 109                 else
 110                         src_x += crtc_w;
 111                 crtc_x = 0;
 112         }
 113
 114         if (crtc_y < 0) {
 115                 if (actual_h)
 116                         src_y -= crtc_y;
 117                 else
 118                         src_y += crtc_h;
 119                 crtc_y = 0;
 120         }
 121
 122         /* set drm framebuffer data. */
 123         overlay->fb_x = src_x;
 124         overlay->fb_y = src_y;
 125         overlay->fb_width = fb->width;
 126         overlay->fb_height = fb->height;
 127         overlay->src_width = src_w;
 128         overlay->src_height = src_h;
 129         overlay->bpp = fb->bits_per_pixel;
 130         overlay->pitch = fb->pitches[0];
 131         overlay->pixel_format = fb->pixel_format;
 132
 133         /* set overlay range to be displayed. */
 134         overlay->crtc_x = crtc_x;
 135         overlay->crtc_y = crtc_y;
 136         overlay->crtc_width = actual_w;
 137         overlay->crtc_height = actual_h;
 138
 139         /* set drm mode data. */
 140         overlay->mode_width = crtc->mode.hdisplay;
 141         overlay->mode_height = crtc->mode.vdisplay;
 142         overlay->refresh = crtc->mode.vrefresh;
 143         overlay->scan_flag = crtc->mode.flags;
 144
 145         DRM_DEBUG_KMS("overlay : offset_x/y(%d,%d), width/height(%d,%d)",
 146                         overlay->crtc_x, overlay->crtc_y,
 147                         overlay->crtc_width, overlay->crtc_height);
 148
 149         exynos_drm_fn_encoder(crtc, overlay, exynos_drm_encoder_plane_mode_set);
 150
 151         return 0;
 152 }
 153
 154 void exynos_plane_commit(struct drm_plane *plane)
 155 {
 156         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 157         struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
 158
 159         exynos_drm_fn_encoder(plane->crtc, &overlay->zpos,
 160                         exynos_drm_encoder_plane_commit);
 161 }
 162
 163 void exynos_plane_dpms(struct drm_plane *plane, int mode)
 164 {
 165         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 166         struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
 167
 168         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 169
 170         if (mode == DRM_MODE_DPMS_ON) {
 171                 if (exynos_plane->enabled)
 172                         return;
 173
 174                 exynos_drm_fn_encoder(plane->crtc, &overlay->zpos,
 175                                 exynos_drm_encoder_plane_enable);
 176
 177                 exynos_plane->enabled = true;
 178         } else {
 179                 if (!exynos_plane->enabled)
 180                         return;
 181
 182                 exynos_drm_fn_encoder(plane->crtc, &overlay->zpos,
 183                                 exynos_drm_encoder_plane_disable);
 184
 185                 exynos_plane->enabled = false;
 186         }
 187 }
 188
 189 static int
 190 exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 191                      struct drm_framebuffer *fb, int crtc_x, int crtc_y,
 192                      unsigned int crtc_w, unsigned int crtc_h,
 193                      uint32_t src_x, uint32_t src_y,
 194                      uint32_t src_w, uint32_t src_h)
 195 {
 196         int ret;
 197
 198         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 199
 200         ret = exynos_plane_mode_set(plane, crtc, fb, crtc_x, crtc_y,
 201                         crtc_w, crtc_h, src_x >> 16, src_y >> 16,
 202                         src_w >> 16, src_h >> 16);
 203         if (ret < 0)
 204                 return ret;
 205
 206         plane->crtc = crtc;
 207
 208         exynos_plane_commit(plane);
 209         exynos_plane_dpms(plane, DRM_MODE_DPMS_ON);
 210
 211         return 0;
 212 }
 213
 214 static int exynos_disable_plane(struct drm_plane *plane)
 215 {
 216         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 217
 218         exynos_plane_dpms(plane, DRM_MODE_DPMS_OFF);
 219
 220         return 0;
 221 }
 222
 223 static void exynos_plane_destroy(struct drm_plane *plane)
 224 {
 225         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 226
 227         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 228
 229         exynos_disable_plane(plane);
 230         drm_plane_cleanup(plane);
 231         kfree(exynos_plane);
 232 }
 233
 234 static int exynos_plane_set_property(struct drm_plane *plane,
 235                                      struct drm_property *property,
 236                                      uint64_t val)
 237 {
 238         struct drm_device *dev = plane->dev;
 239         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 240         struct exynos_drm_private *dev_priv = dev->dev_private;
 241
 242         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 243
 244         if (property == dev_priv->plane_zpos_property) {
 245                 exynos_plane->overlay.zpos = val;
 246                 return 0;
 247         }
 248
 249         return -EINVAL;
 250 }
 251
 252 static struct drm_plane_funcs exynos_plane_funcs = {
 253         .update_plane   = exynos_update_plane,
 254         .disable_plane  = exynos_disable_plane,
 255         .destroy        = exynos_plane_destroy,
 256         .set_property   = exynos_plane_set_property,
 257 };
 258
 259 static void exynos_plane_attach_zpos_property(struct drm_plane *plane)
 260 {
 261         struct drm_device *dev = plane->dev;
 262         struct exynos_drm_private *dev_priv = dev->dev_private;
 263         struct drm_property *prop;
 264
 265         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 266
 267         prop = dev_priv->plane_zpos_property;
 268         if (!prop) {
 269                 prop = drm_property_create_range(dev, 0, "zpos", 0,
 270                                                  MAX_PLANE - 1);
 271                 if (!prop)
 272                         return;
 273
 274                 dev_priv->plane_zpos_property = prop;
 275         }
 276
 277         drm_object_attach_property(&plane->base, prop, 0);
 278 }
 279
 280 struct drm_plane *exynos_plane_init(struct drm_device *dev,
 281                                     unsigned int possible_crtcs, bool priv)
 282 {
 283         struct exynos_plane *exynos_plane;
 284         int err;
 285
 286         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 287
 288         exynos_plane = kzalloc(sizeof(struct exynos_plane), GFP_KERNEL);
 289         if (!exynos_plane) {
 290                 DRM_ERROR("failed to allocate plane\n");
 291                 return NULL;
 292         }
 293
 294         err = drm_plane_init(dev, &exynos_plane->base, possible_crtcs,
 295                               &exynos_plane_funcs, formats, ARRAY_SIZE(formats),
 296                               priv);
 297         if (err) {
 298                 DRM_ERROR("failed to initialize plane\n");
 299                 kfree(exynos_plane);
 300                 return NULL;
 301         }
 302
 303         if (priv)
 304                 exynos_plane->overlay.zpos = DEFAULT_ZPOS;
 305         else
 306                 exynos_plane_attach_zpos_property(&exynos_plane->base);
 307
 308         return &exynos_plane->base;
 309 }