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 f.
  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
  97                 DRM_DEBUG_KMS("buffer: %d, dma_addr = 0x%lx\n",
  98                                 i, (unsigned long)overlay->dma_addr[i]);
  99         }
 100
 101         actual_w = exynos_plane_get_size(crtc_x, crtc_w, crtc->mode.hdisplay);
 102         actual_h = exynos_plane_get_size(crtc_y, crtc_h, crtc->mode.vdisplay);
 103
 104         if (crtc_x < 0) {
 105                 if (actual_w)
 106                         src_x -= crtc_x;
 107                 crtc_x = 0;
 108         }
 109
 110         if (crtc_y < 0) {
 111                 if (actual_h)
 112                         src_y -= crtc_y;
 113                 crtc_y = 0;
 114         }
 115
 116         /* set drm framebuffer data. */
 117         overlay->fb_x = src_x;
 118         overlay->fb_y = src_y;
 119         overlay->fb_width = fb->width;
 120         overlay->fb_height = fb->height;
 121         overlay->src_width = src_w;
 122         overlay->src_height = src_h;
 123         overlay->bpp = fb->bits_per_pixel;
 124         overlay->pitch = fb->pitches[0];
 125         overlay->pixel_format = fb->pixel_format;
 126
 127         /* set overlay range to be displayed. */
 128         overlay->crtc_x = crtc_x;
 129         overlay->crtc_y = crtc_y;
 130         overlay->crtc_width = actual_w;
 131         overlay->crtc_height = actual_h;
 132
 133         /* set drm mode data. */
 134         overlay->mode_width = crtc->mode.hdisplay;
 135         overlay->mode_height = crtc->mode.vdisplay;
 136         overlay->refresh = crtc->mode.vrefresh;
 137         overlay->scan_flag = crtc->mode.flags;
 138
 139         DRM_DEBUG_KMS("overlay : offset_x/y(%d,%d), width/height(%d,%d)",
 140                         overlay->crtc_x, overlay->crtc_y,
 141                         overlay->crtc_width, overlay->crtc_height);
 142
 143         exynos_drm_fn_encoder(crtc, overlay, exynos_drm_encoder_plane_mode_set);
 144
 145         return 0;
 146 }
 147
 148 void exynos_plane_commit(struct drm_plane *plane)
 149 {
 150         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 151         struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
 152
 153         exynos_drm_fn_encoder(plane->crtc, &overlay->zpos,
 154                         exynos_drm_encoder_plane_commit);
 155 }
 156
 157 void exynos_plane_dpms(struct drm_plane *plane, int mode)
 158 {
 159         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 160         struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
 161
 162         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 163
 164         if (mode == DRM_MODE_DPMS_ON) {
 165                 if (exynos_plane->enabled)
 166                         return;
 167
 168                 exynos_drm_fn_encoder(plane->crtc, &overlay->zpos,
 169                                 exynos_drm_encoder_plane_enable);
 170
 171                 exynos_plane->enabled = true;
 172         } else {
 173                 if (!exynos_plane->enabled)
 174                         return;
 175
 176                 exynos_drm_fn_encoder(plane->crtc, &overlay->zpos,
 177                                 exynos_drm_encoder_plane_disable);
 178
 179                 exynos_plane->enabled = false;
 180         }
 181 }
 182
 183 static int
 184 exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 185                      struct drm_framebuffer *fb, int crtc_x, int crtc_y,
 186                      unsigned int crtc_w, unsigned int crtc_h,
 187                      uint32_t src_x, uint32_t src_y,
 188                      uint32_t src_w, uint32_t src_h)
 189 {
 190         int ret;
 191
 192         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 193
 194         ret = exynos_plane_mode_set(plane, crtc, fb, crtc_x, crtc_y,
 195                         crtc_w, crtc_h, src_x >> 16, src_y >> 16,
 196                         src_w >> 16, src_h >> 16);
 197         if (ret < 0)
 198                 return ret;
 199
 200         plane->crtc = crtc;
 201
 202         exynos_plane_commit(plane);
 203         exynos_plane_dpms(plane, DRM_MODE_DPMS_ON);
 204
 205         return 0;
 206 }
 207
 208 static int exynos_disable_plane(struct drm_plane *plane)
 209 {
 210         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 211
 212         exynos_plane_dpms(plane, DRM_MODE_DPMS_OFF);
 213
 214         return 0;
 215 }
 216
 217 static void exynos_plane_destroy(struct drm_plane *plane)
 218 {
 219         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 220
 221         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 222
 223         exynos_disable_plane(plane);
 224         drm_plane_cleanup(plane);
 225         kfree(exynos_plane);
 226 }
 227
 228 static int exynos_plane_set_property(struct drm_plane *plane,
 229                                      struct drm_property *property,
 230                                      uint64_t val)
 231 {
 232         struct drm_device *dev = plane->dev;
 233         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 234         struct exynos_drm_private *dev_priv = dev->dev_private;
 235
 236         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 237
 238         if (property == dev_priv->plane_zpos_property) {
 239                 exynos_plane->overlay.zpos = val;
 240                 return 0;
 241         }
 242
 243         return -EINVAL;
 244 }
 245
 246 static struct drm_plane_funcs exynos_plane_funcs = {
 247         .update_plane   = exynos_update_plane,
 248         .disable_plane  = exynos_disable_plane,
 249         .destroy        = exynos_plane_destroy,
 250         .set_property   = exynos_plane_set_property,
 251 };
 252
 253 static void exynos_plane_attach_zpos_property(struct drm_plane *plane)
 254 {
 255         struct drm_device *dev = plane->dev;
 256         struct exynos_drm_private *dev_priv = dev->dev_private;
 257         struct drm_property *prop;
 258
 259         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 260
 261         prop = dev_priv->plane_zpos_property;
 262         if (!prop) {
 263                 prop = drm_property_create_range(dev, 0, "zpos", 0,
 264                                                  MAX_PLANE - 1);
 265                 if (!prop)
 266                         return;
 267
 268                 dev_priv->plane_zpos_property = prop;
 269         }
 270
 271         drm_object_attach_property(&plane->base, prop, 0);
 272 }
 273
 274 struct drm_plane *exynos_plane_init(struct drm_device *dev,
 275                                     unsigned int possible_crtcs, bool priv)
 276 {
 277         struct exynos_plane *exynos_plane;
 278         int err;
 279
 280         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 281
 282         exynos_plane = kzalloc(sizeof(struct exynos_plane), GFP_KERNEL);
 283         if (!exynos_plane) {
 284                 DRM_ERROR("failed to allocate plane\n");
 285                 return NULL;
 286         }
 287
 288         err = drm_plane_init(dev, &exynos_plane->base, possible_crtcs,
 289                               &exynos_plane_funcs, formats, ARRAY_SIZE(formats),
 290                               priv);
 291         if (err) {
 292                 DRM_ERROR("failed to initialize plane\n");
 293                 kfree(exynos_plane);
 294                 return NULL;
 295         }
 296
 297         if (priv)
 298                 exynos_plane->overlay.zpos = DEFAULT_ZPOS;
 299         else
 300                 exynos_plane_attach_zpos_property(&exynos_plane->base);
 301
 302         return &exynos_plane->base;
 303 }