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 "drmP.h"
  13
  14 #include "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_NV12M,
  33         DRM_FORMAT_NV12MT,
  34 };
  35
  36 /*
  37  * This function is to get X or Y size shown via screen. This needs length and
  38  * start position of CRTC.
  39  *
  40  *      <--- length --->
  41  * CRTC ----------------
  42  *      ^ start        ^ end
  43  *
  44  * There are six cases from a to b.
  45  *
  46  *             <----- SCREEN ----->
  47  *             0                 last
  48  *   ----------|------------------|----------
  49  * CRTCs
  50  * a -------
  51  *        b -------
  52  *        c --------------------------
  53  *                 d --------
  54  *                           e -------
  55  *                                  f -------
  56  */
  57 static int exynos_plane_get_size(int start, unsigned length, unsigned last)
  58 {
  59         int end = start + length;
  60         int size = 0;
  61
  62         if (start <= 0) {
  63                 if (end > 0)
  64                         size = min_t(unsigned, end, last);
  65         } else if (start <= last) {
  66                 size = min_t(unsigned, last - start, length);
  67         }
  68
  69         return size;
  70 }
  71
  72 int exynos_plane_mode_set(struct drm_plane *plane, struct drm_crtc *crtc,
  73                           struct drm_framebuffer *fb, int crtc_x, int crtc_y,
  74                           unsigned int crtc_w, unsigned int crtc_h,
  75                           uint32_t src_x, uint32_t src_y,
  76                           uint32_t src_w, uint32_t src_h)
  77 {
  78         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
  79         struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
  80         unsigned int actual_w;
  81         unsigned int actual_h;
  82         int nr;
  83         int i;
  84
  85         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
  86
  87         nr = exynos_drm_format_num_buffers(fb->pixel_format);
  88         for (i = 0; i < nr; i++) {
  89                 struct exynos_drm_gem_buf *buffer = exynos_drm_fb_buffer(fb, i);
  90
  91                 if (!buffer) {
  92                         DRM_LOG_KMS("buffer is null\n");
  93                         return -EFAULT;
  94                 }
  95
  96                 overlay->dma_addr[i] = buffer->dma_addr;
  97                 overlay->vaddr[i] = buffer->kvaddr;
  98
  99                 DRM_DEBUG_KMS("buffer: %d, vaddr = 0x%lx, dma_addr = 0x%lx\n",
 100                                 i, (unsigned long)overlay->vaddr[i],
 101                                 (unsigned long)overlay->dma_addr[i]);
 102         }
 103
 104         actual_w = exynos_plane_get_size(crtc_x, crtc_w, crtc->mode.hdisplay);
 105         actual_h = exynos_plane_get_size(crtc_y, crtc_h, crtc->mode.vdisplay);
 106
 107         if (crtc_x < 0) {
 108                 if (actual_w)
 109                         src_x -= crtc_x;
 110                 else
 111                         src_x += crtc_w;
 112                 crtc_x = 0;
 113         }
 114
 115         if (crtc_y < 0) {
 116                 if (actual_h)
 117                         src_y -= crtc_y;
 118                 else
 119                         src_y += crtc_h;
 120                 crtc_y = 0;
 121         }
 122
 123         /* set drm framebuffer data. */
 124         overlay->fb_x = src_x;
 125         overlay->fb_y = src_y;
 126         overlay->fb_width = fb->width;
 127         overlay->fb_height = fb->height;
 128         overlay->src_width = src_w;
 129         overlay->src_height = src_h;
 130         overlay->bpp = fb->bits_per_pixel;
 131         overlay->pitch = fb->pitches[0];
 132         overlay->pixel_format = fb->pixel_format;
 133
 134         /* set overlay range to be displayed. */
 135         overlay->crtc_x = crtc_x;
 136         overlay->crtc_y = crtc_y;
 137         overlay->crtc_width = actual_w;
 138         overlay->crtc_height = actual_h;
 139
 140         /* set drm mode data. */
 141         overlay->mode_width = crtc->mode.hdisplay;
 142         overlay->mode_height = crtc->mode.vdisplay;
 143         overlay->refresh = crtc->mode.vrefresh;
 144         overlay->scan_flag = crtc->mode.flags;
 145
 146         DRM_DEBUG_KMS("overlay : offset_x/y(%d,%d), width/height(%d,%d)",
 147                         overlay->crtc_x, overlay->crtc_y,
 148                         overlay->crtc_width, overlay->crtc_height);
 149
 150         exynos_drm_fn_encoder(crtc, overlay, exynos_drm_encoder_plane_mode_set);
 151
 152         return 0;
 153 }
 154
 155 void exynos_plane_commit(struct drm_plane *plane)
 156 {
 157         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 158         struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
 159
 160         exynos_drm_fn_encoder(plane->crtc, &overlay->zpos,
 161                         exynos_drm_encoder_plane_commit);
 162 }
 163
 164 void exynos_plane_dpms(struct drm_plane *plane, int mode)
 165 {
 166         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 167         struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
 168
 169         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 170
 171         if (mode == DRM_MODE_DPMS_ON) {
 172                 if (exynos_plane->enabled)
 173                         return;
 174
 175                 exynos_drm_fn_encoder(plane->crtc, &overlay->zpos,
 176                                 exynos_drm_encoder_plane_enable);
 177
 178                 exynos_plane->enabled = true;
 179         } else {
 180                 if (!exynos_plane->enabled)
 181                         return;
 182
 183                 exynos_drm_fn_encoder(plane->crtc, &overlay->zpos,
 184                                 exynos_drm_encoder_plane_disable);
 185
 186                 exynos_plane->enabled = false;
 187         }
 188 }
 189
 190 static int
 191 exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 192                      struct drm_framebuffer *fb, int crtc_x, int crtc_y,
 193                      unsigned int crtc_w, unsigned int crtc_h,
 194                      uint32_t src_x, uint32_t src_y,
 195                      uint32_t src_w, uint32_t src_h)
 196 {
 197         int ret;
 198
 199         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 200
 201         ret = exynos_plane_mode_set(plane, crtc, fb, crtc_x, crtc_y,
 202                         crtc_w, crtc_h, src_x >> 16, src_y >> 16,
 203                         src_w >> 16, src_h >> 16);
 204         if (ret < 0)
 205                 return ret;
 206
 207         plane->crtc = crtc;
 208         plane->fb = crtc->fb;
 209
 210         exynos_plane_commit(plane);
 211         exynos_plane_dpms(plane, DRM_MODE_DPMS_ON);
 212
 213         return 0;
 214 }
 215
 216 static int exynos_disable_plane(struct drm_plane *plane)
 217 {
 218         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 219
 220         exynos_plane_dpms(plane, DRM_MODE_DPMS_OFF);
 221
 222         return 0;
 223 }
 224
 225 static void exynos_plane_destroy(struct drm_plane *plane)
 226 {
 227         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 228
 229         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 230
 231         exynos_disable_plane(plane);
 232         drm_plane_cleanup(plane);
 233         kfree(exynos_plane);
 234 }
 235
 236 static int exynos_plane_set_property(struct drm_plane *plane,
 237                                      struct drm_property *property,
 238                                      uint64_t val)
 239 {
 240         struct drm_device *dev = plane->dev;
 241         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 242         struct exynos_drm_private *dev_priv = dev->dev_private;
 243
 244         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 245
 246         if (property == dev_priv->plane_zpos_property) {
 247                 exynos_plane->overlay.zpos = val;
 248                 return 0;
 249         }
 250
 251         return -EINVAL;
 252 }
 253
 254 static struct drm_plane_funcs exynos_plane_funcs = {
 255         .update_plane   = exynos_update_plane,
 256         .disable_plane  = exynos_disable_plane,
 257         .destroy        = exynos_plane_destroy,
 258         .set_property   = exynos_plane_set_property,
 259 };
 260
 261 static void exynos_plane_attach_zpos_property(struct drm_plane *plane)
 262 {
 263         struct drm_device *dev = plane->dev;
 264         struct exynos_drm_private *dev_priv = dev->dev_private;
 265         struct drm_property *prop;
 266
 267         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 268
 269         prop = dev_priv->plane_zpos_property;
 270         if (!prop) {
 271                 prop = drm_property_create_range(dev, 0, "zpos", 0,
 272                                                  MAX_PLANE - 1);
 273                 if (!prop)
 274                         return;
 275
 276                 dev_priv->plane_zpos_property = prop;
 277         }
 278
 279         drm_object_attach_property(&plane->base, prop, 0);
 280 }
 281
 282 struct drm_plane *exynos_plane_init(struct drm_device *dev,
 283                                     unsigned int possible_crtcs, bool priv)
 284 {
 285         struct exynos_plane *exynos_plane;
 286         int err;
 287
 288         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 289
 290         exynos_plane = kzalloc(sizeof(struct exynos_plane), GFP_KERNEL);
 291         if (!exynos_plane) {
 292                 DRM_ERROR("failed to allocate plane\n");
 293                 return NULL;
 294         }
 295
 296         err = drm_plane_init(dev, &exynos_plane->base, possible_crtcs,
 297                               &exynos_plane_funcs, formats, ARRAY_SIZE(formats),
 298                               priv);
 299         if (err) {
 300                 DRM_ERROR("failed to initialize plane\n");
 301                 kfree(exynos_plane);
 302                 return NULL;
 303         }
 304
 305         if (priv)
 306                 exynos_plane->overlay.zpos = DEFAULT_ZPOS;
 307         else
 308                 exynos_plane_attach_zpos_property(&exynos_plane->base);
 309
 310         return &exynos_plane->base;
 311 }