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