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_fb.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 const struct drm_plane_funcs mtk_plane_funcs = { 80 .update_plane = drm_atomic_helper_update_plane, 81 .disable_plane = drm_atomic_helper_disable_plane, 82 .destroy = drm_plane_cleanup, 83 .reset = mtk_plane_reset, 84 .atomic_duplicate_state = mtk_plane_duplicate_state, 85 .atomic_destroy_state = mtk_drm_plane_destroy_state, 86 }; 87 88 static int mtk_plane_atomic_check(struct drm_plane *plane, 89 struct drm_plane_state *state) 90 { 91 struct drm_framebuffer *fb = state->fb; 92 struct drm_crtc_state *crtc_state; 93 int ret; 94 95 if (!fb) 96 return 0; 97 98 if (!state->crtc) 99 return 0; 100 101 ret = mtk_drm_crtc_plane_check(state->crtc, plane, 102 to_mtk_plane_state(state)); 103 if (ret) 104 return ret; 105 106 crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc); 107 if (IS_ERR(crtc_state)) 108 return PTR_ERR(crtc_state); 109 110 return drm_atomic_helper_check_plane_state(state, crtc_state, 111 DRM_PLANE_HELPER_NO_SCALING, 112 DRM_PLANE_HELPER_NO_SCALING, 113 true, true); 114 } 115 116 static void mtk_plane_atomic_update(struct drm_plane *plane, 117 struct drm_plane_state *old_state) 118 { 119 struct mtk_plane_state *state = to_mtk_plane_state(plane->state); 120 struct drm_crtc *crtc = plane->state->crtc; 121 struct drm_framebuffer *fb = plane->state->fb; 122 struct drm_gem_object *gem; 123 struct mtk_drm_gem_obj *mtk_gem; 124 unsigned int pitch, format; 125 dma_addr_t addr; 126 127 if (!crtc || WARN_ON(!fb)) 128 return; 129 130 gem = fb->obj[0]; 131 mtk_gem = to_mtk_gem_obj(gem); 132 addr = mtk_gem->dma_addr; 133 pitch = fb->pitches[0]; 134 format = fb->format->format; 135 136 addr += (plane->state->src.x1 >> 16) * fb->format->cpp[0]; 137 addr += (plane->state->src.y1 >> 16) * pitch; 138 139 state->pending.enable = true; 140 state->pending.pitch = pitch; 141 state->pending.format = format; 142 state->pending.addr = addr; 143 state->pending.x = plane->state->dst.x1; 144 state->pending.y = plane->state->dst.y1; 145 state->pending.width = drm_rect_width(&plane->state->dst); 146 state->pending.height = drm_rect_height(&plane->state->dst); 147 state->pending.rotation = plane->state->rotation; 148 wmb(); /* Make sure the above parameters are set before update */ 149 state->pending.dirty = true; 150 } 151 152 static void mtk_plane_atomic_disable(struct drm_plane *plane, 153 struct drm_plane_state *old_state) 154 { 155 struct mtk_plane_state *state = to_mtk_plane_state(plane->state); 156 157 state->pending.enable = false; 158 wmb(); /* Make sure the above parameter is set before update */ 159 state->pending.dirty = true; 160 } 161 162 static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = { 163 .prepare_fb = drm_gem_fb_prepare_fb, 164 .atomic_check = mtk_plane_atomic_check, 165 .atomic_update = mtk_plane_atomic_update, 166 .atomic_disable = mtk_plane_atomic_disable, 167 }; 168 169 int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane, 170 unsigned long possible_crtcs, enum drm_plane_type type, 171 unsigned int supported_rotations) 172 { 173 int err; 174 175 err = drm_universal_plane_init(dev, plane, possible_crtcs, 176 &mtk_plane_funcs, formats, 177 ARRAY_SIZE(formats), NULL, type, NULL); 178 if (err) { 179 DRM_ERROR("failed to initialize plane\n"); 180 return err; 181 } 182 183 if (supported_rotations & ~DRM_MODE_ROTATE_0) { 184 err = drm_plane_create_rotation_property(plane, 185 DRM_MODE_ROTATE_0, 186 supported_rotations); 187 if (err) 188 DRM_INFO("Create rotation property failed\n"); 189 } 190 191 drm_plane_helper_add(plane, &mtk_plane_helper_funcs); 192 193 return 0; 194 } 195