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_fourcc.h>
  10 #include <drm/drm_plane_helper.h>
  11 #include <drm/drm_gem_framebuffer_helper.h>
  12
  13 #include "mtk_drm_crtc.h"
  14 #include "mtk_drm_ddp_comp.h"
  15 #include "mtk_drm_drv.h"
  16 #include "mtk_drm_gem.h"
  17 #include "mtk_drm_plane.h"
  18
  19 static const u32 formats[] = {
  20         DRM_FORMAT_XRGB8888,
  21         DRM_FORMAT_ARGB8888,
  22         DRM_FORMAT_BGRX8888,
  23         DRM_FORMAT_BGRA8888,
  24         DRM_FORMAT_ABGR8888,
  25         DRM_FORMAT_XBGR8888,
  26         DRM_FORMAT_RGB888,
  27         DRM_FORMAT_BGR888,
  28         DRM_FORMAT_RGB565,
  29         DRM_FORMAT_UYVY,
  30         DRM_FORMAT_YUYV,
  31 };
  32
  33 static void mtk_plane_reset(struct drm_plane *plane)
  34 {
  35         struct mtk_plane_state *state;
  36
  37         if (plane->state) {
  38                 __drm_atomic_helper_plane_destroy_state(plane->state);
  39
  40                 state = to_mtk_plane_state(plane->state);
  41                 memset(state, 0, sizeof(*state));
  42         } else {
  43                 state = kzalloc(sizeof(*state), GFP_KERNEL);
  44                 if (!state)
  45                         return;
  46                 plane->state = &state->base;
  47         }
  48
  49         state->base.plane = plane;
  50         state->pending.format = DRM_FORMAT_RGB565;
  51 }
  52
  53 static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane)
  54 {
  55         struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state);
  56         struct mtk_plane_state *state;
  57
  58         state = kzalloc(sizeof(*state), GFP_KERNEL);
  59         if (!state)
  60                 return NULL;
  61
  62         __drm_atomic_helper_plane_duplicate_state(plane, &state->base);
  63
  64         WARN_ON(state->base.plane != plane);
  65
  66         state->pending = old_state->pending;
  67
  68         return &state->base;
  69 }
  70
  71 static void mtk_drm_plane_destroy_state(struct drm_plane *plane,
  72                                         struct drm_plane_state *state)
  73 {
  74         __drm_atomic_helper_plane_destroy_state(state);
  75         kfree(to_mtk_plane_state(state));
  76 }
  77
  78 static const struct drm_plane_funcs mtk_plane_funcs = {
  79         .update_plane = drm_atomic_helper_update_plane,
  80         .disable_plane = drm_atomic_helper_disable_plane,
  81         .destroy = drm_plane_cleanup,
  82         .reset = mtk_plane_reset,
  83         .atomic_duplicate_state = mtk_plane_duplicate_state,
  84         .atomic_destroy_state = mtk_drm_plane_destroy_state,
  85 };
  86
  87 static int mtk_plane_atomic_check(struct drm_plane *plane,
  88                                   struct drm_plane_state *state)
  89 {
  90         struct drm_framebuffer *fb = state->fb;
  91         struct drm_crtc_state *crtc_state;
  92         int ret;
  93
  94         if (!fb)
  95                 return 0;
  96
  97         if (!state->crtc)
  98                 return 0;
  99
 100         ret = mtk_drm_crtc_plane_check(state->crtc, plane,
 101                                        to_mtk_plane_state(state));
 102         if (ret)
 103                 return ret;
 104
 105         crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
 106         if (IS_ERR(crtc_state))
 107                 return PTR_ERR(crtc_state);
 108
 109         return drm_atomic_helper_check_plane_state(state, crtc_state,
 110                                                    DRM_PLANE_HELPER_NO_SCALING,
 111                                                    DRM_PLANE_HELPER_NO_SCALING,
 112                                                    true, true);
 113 }
 114
 115 static void mtk_plane_atomic_update(struct drm_plane *plane,
 116                                     struct drm_plane_state *old_state)
 117 {
 118         struct mtk_plane_state *state = to_mtk_plane_state(plane->state);
 119         struct drm_crtc *crtc = plane->state->crtc;
 120         struct drm_framebuffer *fb = plane->state->fb;
 121         struct drm_gem_object *gem;
 122         struct mtk_drm_gem_obj *mtk_gem;
 123         unsigned int pitch, format;
 124         dma_addr_t addr;
 125
 126         if (!crtc || WARN_ON(!fb))
 127                 return;
 128
 129         gem = fb->obj[0];
 130         mtk_gem = to_mtk_gem_obj(gem);
 131         addr = mtk_gem->dma_addr;
 132         pitch = fb->pitches[0];
 133         format = fb->format->format;
 134
 135         addr += (plane->state->src.x1 >> 16) * fb->format->cpp[0];
 136         addr += (plane->state->src.y1 >> 16) * pitch;
 137
 138         state->pending.enable = true;
 139         state->pending.pitch = pitch;
 140         state->pending.format = format;
 141         state->pending.addr = addr;
 142         state->pending.x = plane->state->dst.x1;
 143         state->pending.y = plane->state->dst.y1;
 144         state->pending.width = drm_rect_width(&plane->state->dst);
 145         state->pending.height = drm_rect_height(&plane->state->dst);
 146         state->pending.rotation = plane->state->rotation;
 147         wmb(); /* Make sure the above parameters are set before update */
 148         state->pending.dirty = true;
 149 }
 150
 151 static void mtk_plane_atomic_disable(struct drm_plane *plane,
 152                                      struct drm_plane_state *old_state)
 153 {
 154         struct mtk_plane_state *state = to_mtk_plane_state(plane->state);
 155
 156         state->pending.enable = false;
 157         wmb(); /* Make sure the above parameter is set before update */
 158         state->pending.dirty = true;
 159 }
 160
 161 static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
 162         .prepare_fb = drm_gem_fb_prepare_fb,
 163         .atomic_check = mtk_plane_atomic_check,
 164         .atomic_update = mtk_plane_atomic_update,
 165         .atomic_disable = mtk_plane_atomic_disable,
 166 };
 167
 168 int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
 169                    unsigned long possible_crtcs, enum drm_plane_type type,
 170                    unsigned int supported_rotations)
 171 {
 172         int err;
 173
 174         err = drm_universal_plane_init(dev, plane, possible_crtcs,
 175                                        &mtk_plane_funcs, formats,
 176                                        ARRAY_SIZE(formats), NULL, type, NULL);
 177         if (err) {
 178                 DRM_ERROR("failed to initialize plane\n");
 179                 return err;
 180         }
 181
 182         if (supported_rotations & ~DRM_MODE_ROTATE_0) {
 183                 err = drm_plane_create_rotation_property(plane,
 184                                                          DRM_MODE_ROTATE_0,
 185                                                          supported_rotations);
 186                 if (err)
 187                         DRM_INFO("Create rotation property failed\n");
 188         }
 189
 190         drm_plane_helper_add(plane, &mtk_plane_helper_funcs);
 191
 192         return 0;
 193 }