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_crtc.h"
  17 #include "exynos_drm_fb.h"
  18 #include "exynos_drm_gem.h"
  19 #include "exynos_drm_plane.h"
  20
  21 #define to_exynos_plane(x)      container_of(x, struct exynos_plane, base)
  22
  23 struct exynos_plane {
  24         struct drm_plane                base;
  25         struct exynos_drm_overlay       overlay;
  26         bool                            enabled;
  27 };
  28
  29 static const uint32_t formats[] = {
  30         DRM_FORMAT_XRGB8888,
  31         DRM_FORMAT_ARGB8888,
  32         DRM_FORMAT_NV12,
  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 f.
  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         nr = exynos_drm_fb_get_buf_cnt(fb);
  86         for (i = 0; i < nr; i++) {
  87                 struct exynos_drm_gem_buf *buffer = exynos_drm_fb_buffer(fb, i);
  88
  89                 if (!buffer) {
  90                         DRM_DEBUG_KMS("buffer is null\n");
  91                         return -EFAULT;
  92                 }
  93
  94                 overlay->dma_addr[i] = buffer->dma_addr;
  95
  96                 DRM_DEBUG_KMS("buffer: %d, dma_addr = 0x%lx\n",
  97                                 i, (unsigned long)overlay->dma_addr[i]);
  98         }
  99
 100         actual_w = exynos_plane_get_size(crtc_x, crtc_w, crtc->mode.hdisplay);
 101         actual_h = exynos_plane_get_size(crtc_y, crtc_h, crtc->mode.vdisplay);
 102
 103         if (crtc_x < 0) {
 104                 if (actual_w)
 105                         src_x -= crtc_x;
 106                 crtc_x = 0;
 107         }
 108
 109         if (crtc_y < 0) {
 110                 if (actual_h)
 111                         src_y -= crtc_y;
 112                 crtc_y = 0;
 113         }
 114
 115         /* set drm framebuffer data. */
 116         overlay->fb_x = src_x;
 117         overlay->fb_y = src_y;
 118         overlay->fb_width = fb->width;
 119         overlay->fb_height = fb->height;
 120         overlay->src_width = src_w;
 121         overlay->src_height = src_h;
 122         overlay->bpp = fb->bits_per_pixel;
 123         overlay->pitch = fb->pitches[0];
 124         overlay->pixel_format = fb->pixel_format;
 125
 126         /* set overlay range to be displayed. */
 127         overlay->crtc_x = crtc_x;
 128         overlay->crtc_y = crtc_y;
 129         overlay->crtc_width = actual_w;
 130         overlay->crtc_height = actual_h;
 131
 132         /* set drm mode data. */
 133         overlay->mode_width = crtc->mode.hdisplay;
 134         overlay->mode_height = crtc->mode.vdisplay;
 135         overlay->refresh = crtc->mode.vrefresh;
 136         overlay->scan_flag = crtc->mode.flags;
 137
 138         DRM_DEBUG_KMS("overlay : offset_x/y(%d,%d), width/height(%d,%d)",
 139                         overlay->crtc_x, overlay->crtc_y,
 140                         overlay->crtc_width, overlay->crtc_height);
 141
 142         exynos_drm_crtc_plane_mode_set(crtc, overlay);
 143
 144         return 0;
 145 }
 146
 147 void exynos_plane_commit(struct drm_plane *plane)
 148 {
 149         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 150         struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
 151
 152         exynos_drm_crtc_plane_commit(plane->crtc, overlay->zpos);
 153 }
 154
 155 void exynos_plane_dpms(struct drm_plane *plane, int mode)
 156 {
 157         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 158         struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
 159
 160         if (mode == DRM_MODE_DPMS_ON) {
 161                 if (exynos_plane->enabled)
 162                         return;
 163
 164                 exynos_drm_crtc_plane_enable(plane->crtc, overlay->zpos);
 165                 exynos_plane->enabled = true;
 166         } else {
 167                 if (!exynos_plane->enabled)
 168                         return;
 169
 170                 exynos_drm_crtc_plane_disable(plane->crtc, overlay->zpos);
 171                 exynos_plane->enabled = false;
 172         }
 173 }
 174
 175 static int
 176 exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 177                      struct drm_framebuffer *fb, int crtc_x, int crtc_y,
 178                      unsigned int crtc_w, unsigned int crtc_h,
 179                      uint32_t src_x, uint32_t src_y,
 180                      uint32_t src_w, uint32_t src_h)
 181 {
 182         int ret;
 183
 184         ret = exynos_plane_mode_set(plane, crtc, fb, crtc_x, crtc_y,
 185                         crtc_w, crtc_h, src_x >> 16, src_y >> 16,
 186                         src_w >> 16, src_h >> 16);
 187         if (ret < 0)
 188                 return ret;
 189
 190         plane->crtc = crtc;
 191
 192         exynos_plane_commit(plane);
 193         exynos_plane_dpms(plane, DRM_MODE_DPMS_ON);
 194
 195         return 0;
 196 }
 197
 198 static int exynos_disable_plane(struct drm_plane *plane)
 199 {
 200         exynos_plane_dpms(plane, DRM_MODE_DPMS_OFF);
 201
 202         return 0;
 203 }
 204
 205 static void exynos_plane_destroy(struct drm_plane *plane)
 206 {
 207         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 208
 209         exynos_disable_plane(plane);
 210         drm_plane_cleanup(plane);
 211         kfree(exynos_plane);
 212 }
 213
 214 static int exynos_plane_set_property(struct drm_plane *plane,
 215                                      struct drm_property *property,
 216                                      uint64_t val)
 217 {
 218         struct drm_device *dev = plane->dev;
 219         struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 220         struct exynos_drm_private *dev_priv = dev->dev_private;
 221
 222         if (property == dev_priv->plane_zpos_property) {
 223                 exynos_plane->overlay.zpos = val;
 224                 return 0;
 225         }
 226
 227         return -EINVAL;
 228 }
 229
 230 static struct drm_plane_funcs exynos_plane_funcs = {
 231         .update_plane   = exynos_update_plane,
 232         .disable_plane  = exynos_disable_plane,
 233         .destroy        = exynos_plane_destroy,
 234         .set_property   = exynos_plane_set_property,
 235 };
 236
 237 static void exynos_plane_attach_zpos_property(struct drm_plane *plane)
 238 {
 239         struct drm_device *dev = plane->dev;
 240         struct exynos_drm_private *dev_priv = dev->dev_private;
 241         struct drm_property *prop;
 242
 243         prop = dev_priv->plane_zpos_property;
 244         if (!prop) {
 245                 prop = drm_property_create_range(dev, 0, "zpos", 0,
 246                                                  MAX_PLANE - 1);
 247                 if (!prop)
 248                         return;
 249
 250                 dev_priv->plane_zpos_property = prop;
 251         }
 252
 253         drm_object_attach_property(&plane->base, prop, 0);
 254 }
 255
 256 struct drm_plane *exynos_plane_init(struct drm_device *dev,
 257                                     unsigned long possible_crtcs, bool priv)
 258 {
 259         struct exynos_plane *exynos_plane;
 260         int err;
 261
 262         exynos_plane = kzalloc(sizeof(struct exynos_plane), GFP_KERNEL);
 263         if (!exynos_plane)
 264                 return NULL;
 265
 266         err = drm_plane_init(dev, &exynos_plane->base, possible_crtcs,
 267                               &exynos_plane_funcs, formats, ARRAY_SIZE(formats),
 268                               priv);
 269         if (err) {
 270                 DRM_ERROR("failed to initialize plane\n");
 271                 kfree(exynos_plane);
 272                 return NULL;
 273         }
 274
 275         if (priv)
 276                 exynos_plane->overlay.zpos = DEFAULT_ZPOS;
 277         else
 278                 exynos_plane_attach_zpos_property(&exynos_plane->base);
 279
 280         return &exynos_plane->base;
 281 }