drivers/gpu/drm/mediatek/mtk_drm_plane.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2015 MediaTek Inc.
   4  * Author: CK Hu <ck.hu@mediatek.com>
   5  */
   6
   7 #include <drm/drm_atomic.h>
   8 #include <drm/drm_atomic_helper.h>
   9 #include <drm/drm_atomic_uapi.h>
  10 #include <drm/drm_fourcc.h>
  11 #include <drm/drm_gem_atomic_helper.h>
  12 #include <drm/drm_plane_helper.h>
  13
  14 #include "mtk_drm_crtc.h"
  15 #include "mtk_drm_ddp_comp.h"
  16 #include "mtk_drm_drv.h"
  17 #include "mtk_drm_gem.h"
  18 #include "mtk_drm_plane.h"
  19
  20 static const u32 formats[] = {
  21         DRM_FORMAT_XRGB8888,
  22         DRM_FORMAT_ARGB8888,
  23         DRM_FORMAT_BGRX8888,
  24         DRM_FORMAT_BGRA8888,
  25         DRM_FORMAT_ABGR8888,
  26         DRM_FORMAT_XBGR8888,
  27         DRM_FORMAT_RGB888,
  28         DRM_FORMAT_BGR888,
  29         DRM_FORMAT_RGB565,
  30         DRM_FORMAT_UYVY,
  31         DRM_FORMAT_YUYV,
  32 };
  33
  34 static void mtk_plane_reset(struct drm_plane *plane)
  35 {
  36         struct mtk_plane_state *state;
  37
  38         if (plane->state) {
  39                 __drm_atomic_helper_plane_destroy_state(plane->state);
  40
  41                 state = to_mtk_plane_state(plane->state);
  42                 memset(state, 0, sizeof(*state));
  43         } else {
  44                 state = kzalloc(sizeof(*state), GFP_KERNEL);
  45                 if (!state)
  46                         return;
  47         }
  48
  49         __drm_atomic_helper_plane_reset(plane, &state->base);
  50
  51         state->base.plane = plane;
  52         state->pending.format = DRM_FORMAT_RGB565;
  53 }
  54
  55 static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane)
  56 {
  57         struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state);
  58         struct mtk_plane_state *state;
  59
  60         state = kmalloc(sizeof(*state), GFP_KERNEL);
  61         if (!state)
  62                 return NULL;
  63
  64         __drm_atomic_helper_plane_duplicate_state(plane, &state->base);
  65
  66         WARN_ON(state->base.plane != plane);
  67
  68         state->pending = old_state->pending;
  69
  70         return &state->base;
  71 }
  72
  73 static void mtk_drm_plane_destroy_state(struct drm_plane *plane,
  74                                         struct drm_plane_state *state)
  75 {
  76         __drm_atomic_helper_plane_destroy_state(state);
  77         kfree(to_mtk_plane_state(state));
  78 }
  79
  80 static int mtk_plane_atomic_async_check(struct drm_plane *plane,
  81                                         struct drm_atomic_state *state)
  82 {
  83         struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
  84                                                                                  plane);
  85         struct drm_crtc_state *crtc_state;
  86         int ret;
  87
  88         if (plane != new_plane_state->crtc->cursor)
  89                 return -EINVAL;
  90
  91         if (!plane->state)
  92                 return -EINVAL;
  93
  94         if (!plane->state->fb)
  95                 return -EINVAL;
  96
  97         ret = mtk_drm_crtc_plane_check(new_plane_state->crtc, plane,
  98                                        to_mtk_plane_state(new_plane_state));
  99         if (ret)
 100                 return ret;
 101
 102         if (state)
 103                 crtc_state = drm_atomic_get_existing_crtc_state(state,
 104                                                                 new_plane_state->crtc);
 105         else /* Special case for asynchronous cursor updates. */
 106                 crtc_state = new_plane_state->crtc->state;
 107
 108         return drm_atomic_helper_check_plane_state(plane->state, crtc_state,
 109                                                    DRM_PLANE_HELPER_NO_SCALING,
 110                                                    DRM_PLANE_HELPER_NO_SCALING,
 111                                                    true, true);
 112 }
 113
 114 static void mtk_plane_update_new_state(struct drm_plane_state *new_state,
 115                                        struct mtk_plane_state *mtk_plane_state)
 116 {
 117         struct drm_framebuffer *fb = new_state->fb;
 118         struct drm_gem_object *gem;
 119         struct mtk_drm_gem_obj *mtk_gem;
 120         unsigned int pitch, format;
 121         dma_addr_t addr;
 122
 123         gem = fb->obj[0];
 124         mtk_gem = to_mtk_gem_obj(gem);
 125         addr = mtk_gem->dma_addr;
 126         pitch = fb->pitches[0];
 127         format = fb->format->format;
 128
 129         addr += (new_state->src.x1 >> 16) * fb->format->cpp[0];
 130         addr += (new_state->src.y1 >> 16) * pitch;
 131
 132         mtk_plane_state->pending.enable = true;
 133         mtk_plane_state->pending.pitch = pitch;
 134         mtk_plane_state->pending.format = format;
 135         mtk_plane_state->pending.addr = addr;
 136         mtk_plane_state->pending.x = new_state->dst.x1;
 137         mtk_plane_state->pending.y = new_state->dst.y1;
 138         mtk_plane_state->pending.width = drm_rect_width(&new_state->dst);
 139         mtk_plane_state->pending.height = drm_rect_height(&new_state->dst);
 140         mtk_plane_state->pending.rotation = new_state->rotation;
 141 }
 142
 143 static void mtk_plane_atomic_async_update(struct drm_plane *plane,
 144                                           struct drm_atomic_state *state)
 145 {
 146         struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
 147                                                                            plane);
 148         struct mtk_plane_state *new_plane_state = to_mtk_plane_state(plane->state);
 149
 150         plane->state->crtc_x = new_state->crtc_x;
 151         plane->state->crtc_y = new_state->crtc_y;
 152         plane->state->crtc_h = new_state->crtc_h;
 153         plane->state->crtc_w = new_state->crtc_w;
 154         plane->state->src_x = new_state->src_x;
 155         plane->state->src_y = new_state->src_y;
 156         plane->state->src_h = new_state->src_h;
 157         plane->state->src_w = new_state->src_w;
 158         swap(plane->state->fb, new_state->fb);
 159
 160         mtk_plane_update_new_state(new_state, new_plane_state);
 161         wmb(); /* Make sure the above parameters are set before update */
 162         new_plane_state->pending.async_dirty = true;
 163         mtk_drm_crtc_async_update(new_state->crtc, plane, state);
 164 }
 165
 166 static const struct drm_plane_funcs mtk_plane_funcs = {
 167         .update_plane = drm_atomic_helper_update_plane,
 168         .disable_plane = drm_atomic_helper_disable_plane,
 169         .destroy = drm_plane_cleanup,
 170         .reset = mtk_plane_reset,
 171         .atomic_duplicate_state = mtk_plane_duplicate_state,
 172         .atomic_destroy_state = mtk_drm_plane_destroy_state,
 173 };
 174
 175 static int mtk_plane_atomic_check(struct drm_plane *plane,
 176                                   struct drm_atomic_state *state)
 177 {
 178         struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
 179                                                                                  plane);
 180         struct drm_framebuffer *fb = new_plane_state->fb;
 181         struct drm_crtc_state *crtc_state;
 182         int ret;
 183
 184         if (!fb)
 185                 return 0;
 186
 187         if (WARN_ON(!new_plane_state->crtc))
 188                 return 0;
 189
 190         ret = mtk_drm_crtc_plane_check(new_plane_state->crtc, plane,
 191                                        to_mtk_plane_state(new_plane_state));
 192         if (ret)
 193                 return ret;
 194
 195         crtc_state = drm_atomic_get_crtc_state(state,
 196                                                new_plane_state->crtc);
 197         if (IS_ERR(crtc_state))
 198                 return PTR_ERR(crtc_state);
 199
 200         return drm_atomic_helper_check_plane_state(new_plane_state,
 201                                                    crtc_state,
 202                                                    DRM_PLANE_HELPER_NO_SCALING,
 203                                                    DRM_PLANE_HELPER_NO_SCALING,
 204                                                    true, true);
 205 }
 206
 207 static void mtk_plane_atomic_disable(struct drm_plane *plane,
 208                                      struct drm_atomic_state *state)
 209 {
 210         struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
 211                                                                            plane);
 212         struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
 213         mtk_plane_state->pending.enable = false;
 214         wmb(); /* Make sure the above parameter is set before update */
 215         mtk_plane_state->pending.dirty = true;
 216 }
 217
 218 static void mtk_plane_atomic_update(struct drm_plane *plane,
 219                                     struct drm_atomic_state *state)
 220 {
 221         struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
 222                                                                            plane);
 223         struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
 224
 225         if (!new_state->crtc || WARN_ON(!new_state->fb))
 226                 return;
 227
 228         if (!new_state->visible) {
 229                 mtk_plane_atomic_disable(plane, state);
 230                 return;
 231         }
 232
 233         mtk_plane_update_new_state(new_state, mtk_plane_state);
 234         wmb(); /* Make sure the above parameters are set before update */
 235         mtk_plane_state->pending.dirty = true;
 236 }
 237
 238 static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
 239         .atomic_check = mtk_plane_atomic_check,
 240         .atomic_update = mtk_plane_atomic_update,
 241         .atomic_disable = mtk_plane_atomic_disable,
 242         .atomic_async_update = mtk_plane_atomic_async_update,
 243         .atomic_async_check = mtk_plane_atomic_async_check,
 244 };
 245
 246 int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
 247                    unsigned long possible_crtcs, enum drm_plane_type type,
 248                    unsigned int supported_rotations)
 249 {
 250         int err;
 251
 252         err = drm_universal_plane_init(dev, plane, possible_crtcs,
 253                                        &mtk_plane_funcs, formats,
 254                                        ARRAY_SIZE(formats), NULL, type, NULL);
 255         if (err) {
 256                 DRM_ERROR("failed to initialize plane\n");
 257                 return err;
 258         }
 259
 260         if (supported_rotations & ~DRM_MODE_ROTATE_0) {
 261                 err = drm_plane_create_rotation_property(plane,
 262                                                          DRM_MODE_ROTATE_0,
 263                                                          supported_rotations);
 264                 if (err)
 265                         DRM_INFO("Create rotation property failed\n");
 266         }
 267
 268         drm_plane_helper_add(plane, &mtk_plane_helper_funcs);
 269
 270         return 0;
 271 }