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 <drm/drm_plane_helper.h>
  16 #include "exynos_drm_drv.h"
  17 #include "exynos_drm_crtc.h"
  18 #include "exynos_drm_fb.h"
  19 #include "exynos_drm_gem.h"
  20 #include "exynos_drm_plane.h"
  21
  22 static const uint32_t formats[] = {
  23         DRM_FORMAT_XRGB8888,
  24         DRM_FORMAT_ARGB8888,
  25         DRM_FORMAT_NV12,
  26 };
  27
  28 /*
  29  * This function is to get X or Y size shown via screen. This needs length and
  30  * start position of CRTC.
  31  *
  32  *      <--- length --->
  33  * CRTC ----------------
  34  *      ^ start        ^ end
  35  *
  36  * There are six cases from a to f.
  37  *
  38  *             <----- SCREEN ----->
  39  *             0                 last
  40  *   ----------|------------------|----------
  41  * CRTCs
  42  * a -------
  43  *        b -------
  44  *        c --------------------------
  45  *                 d --------
  46  *                           e -------
  47  *                                  f -------
  48  */
  49 static int exynos_plane_get_size(int start, unsigned length, unsigned last)
  50 {
  51         int end = start + length;
  52         int size = 0;
  53
  54         if (start <= 0) {
  55                 if (end > 0)
  56                         size = min_t(unsigned, end, last);
  57         } else if (start <= last) {
  58                 size = min_t(unsigned, last - start, length);
  59         }
  60
  61         return size;
  62 }
  63
  64 int exynos_check_plane(struct drm_plane *plane, struct drm_framebuffer *fb)
  65 {
  66         struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
  67         int nr;
  68         int i;
  69
  70         nr = exynos_drm_fb_get_buf_cnt(fb);
  71         for (i = 0; i < nr; i++) {
  72                 struct exynos_drm_gem_buf *buffer = exynos_drm_fb_buffer(fb, i);
  73
  74                 if (!buffer) {
  75                         DRM_DEBUG_KMS("buffer is null\n");
  76                         return -EFAULT;
  77                 }
  78
  79                 exynos_plane->dma_addr[i] = buffer->dma_addr + fb->offsets[i];
  80
  81                 DRM_DEBUG_KMS("buffer: %d, dma_addr = 0x%lx\n",
  82                                 i, (unsigned long)exynos_plane->dma_addr[i]);
  83         }
  84
  85         return 0;
  86 }
  87
  88 void exynos_plane_mode_set(struct drm_plane *plane, struct drm_crtc *crtc,
  89                           struct drm_framebuffer *fb, int crtc_x, int crtc_y,
  90                           unsigned int crtc_w, unsigned int crtc_h,
  91                           uint32_t src_x, uint32_t src_y,
  92                           uint32_t src_w, uint32_t src_h)
  93 {
  94         struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
  95         unsigned int actual_w;
  96         unsigned int actual_h;
  97
  98         actual_w = exynos_plane_get_size(crtc_x, crtc_w, crtc->mode.hdisplay);
  99         actual_h = exynos_plane_get_size(crtc_y, crtc_h, crtc->mode.vdisplay);
 100
 101         if (crtc_x < 0) {
 102                 if (actual_w)
 103                         src_x -= crtc_x;
 104                 crtc_x = 0;
 105         }
 106
 107         if (crtc_y < 0) {
 108                 if (actual_h)
 109                         src_y -= crtc_y;
 110                 crtc_y = 0;
 111         }
 112
 113         /* set ratio */
 114         exynos_plane->h_ratio = (src_w << 16) / crtc_w;
 115         exynos_plane->v_ratio = (src_h << 16) / crtc_h;
 116
 117         /* set drm framebuffer data. */
 118         exynos_plane->src_x = src_x;
 119         exynos_plane->src_y = src_y;
 120         exynos_plane->src_width = (actual_w * exynos_plane->h_ratio) >> 16;
 121         exynos_plane->src_height = (actual_h * exynos_plane->v_ratio) >> 16;
 122         exynos_plane->fb_width = fb->width;
 123         exynos_plane->fb_height = fb->height;
 124         exynos_plane->bpp = fb->bits_per_pixel;
 125         exynos_plane->pitch = fb->pitches[0];
 126         exynos_plane->pixel_format = fb->pixel_format;
 127
 128         /* set plane range to be displayed. */
 129         exynos_plane->crtc_x = crtc_x;
 130         exynos_plane->crtc_y = crtc_y;
 131         exynos_plane->crtc_width = actual_w;
 132         exynos_plane->crtc_height = actual_h;
 133
 134         /* set drm mode data. */
 135         exynos_plane->mode_width = crtc->mode.hdisplay;
 136         exynos_plane->mode_height = crtc->mode.vdisplay;
 137         exynos_plane->refresh = crtc->mode.vrefresh;
 138         exynos_plane->scan_flag = crtc->mode.flags;
 139
 140         DRM_DEBUG_KMS("plane : offset_x/y(%d,%d), width/height(%d,%d)",
 141                         exynos_plane->crtc_x, exynos_plane->crtc_y,
 142                         exynos_plane->crtc_width, exynos_plane->crtc_height);
 143
 144         plane->crtc = crtc;
 145 }
 146
 147 int
 148 exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 149                      struct drm_framebuffer *fb, int crtc_x, int crtc_y,
 150                      unsigned int crtc_w, unsigned int crtc_h,
 151                      uint32_t src_x, uint32_t src_y,
 152                      uint32_t src_w, uint32_t src_h)
 153 {
 154
 155         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
 156         struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
 157         int ret;
 158
 159         ret = exynos_check_plane(plane, fb);
 160         if (ret < 0)
 161                 return ret;
 162
 163         exynos_plane_mode_set(plane, crtc, fb, crtc_x, crtc_y,
 164                               crtc_w, crtc_h, src_x >> 16, src_y >> 16,
 165                               src_w >> 16, src_h >> 16);
 166
 167         if (exynos_crtc->ops->win_commit)
 168                 exynos_crtc->ops->win_commit(exynos_crtc, exynos_plane->zpos);
 169
 170         return 0;
 171 }
 172
 173 static int exynos_disable_plane(struct drm_plane *plane)
 174 {
 175         struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
 176         struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(plane->crtc);
 177
 178         if (exynos_crtc && exynos_crtc->ops->win_disable)
 179                 exynos_crtc->ops->win_disable(exynos_crtc,
 180                                               exynos_plane->zpos);
 181
 182         return 0;
 183 }
 184
 185 static struct drm_plane_funcs exynos_plane_funcs = {
 186         .update_plane   = exynos_update_plane,
 187         .disable_plane  = exynos_disable_plane,
 188         .destroy        = drm_plane_cleanup,
 189 };
 190
 191 static void exynos_plane_attach_zpos_property(struct drm_plane *plane,
 192                                               unsigned int zpos)
 193 {
 194         struct drm_device *dev = plane->dev;
 195         struct exynos_drm_private *dev_priv = dev->dev_private;
 196         struct drm_property *prop;
 197
 198         prop = dev_priv->plane_zpos_property;
 199         if (!prop) {
 200                 prop = drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE,
 201                                                  "zpos", 0, MAX_PLANE - 1);
 202                 if (!prop)
 203                         return;
 204
 205                 dev_priv->plane_zpos_property = prop;
 206         }
 207
 208         drm_object_attach_property(&plane->base, prop, zpos);
 209 }
 210
 211 int exynos_plane_init(struct drm_device *dev,
 212                       struct exynos_drm_plane *exynos_plane,
 213                       unsigned long possible_crtcs, enum drm_plane_type type,
 214                       unsigned int zpos)
 215 {
 216         int err;
 217
 218         err = drm_universal_plane_init(dev, &exynos_plane->base, possible_crtcs,
 219                                        &exynos_plane_funcs, formats,
 220                                        ARRAY_SIZE(formats), type);
 221         if (err) {
 222                 DRM_ERROR("failed to initialize plane\n");
 223                 return err;
 224         }
 225
 226         exynos_plane->zpos = zpos;
 227
 228         if (type == DRM_PLANE_TYPE_OVERLAY)
 229                 exynos_plane_attach_zpos_property(&exynos_plane->base, zpos);
 230
 231         return 0;
 232 }