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/drmP.h> 8 #include <drm/drm_atomic.h> 9 #include <drm/drm_atomic_helper.h> 10 #include <drm/drm_plane_helper.h> 11 12 #include "mtk_drm_crtc.h" 13 #include "mtk_drm_ddp_comp.h" 14 #include "mtk_drm_drv.h" 15 #include "mtk_drm_fb.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_RGB565, 23 DRM_FORMAT_UYVY, 24 DRM_FORMAT_YUYV, 25 }; 26 27 static void mtk_plane_reset(struct drm_plane *plane) 28 { 29 struct mtk_plane_state *state; 30 31 if (plane->state) { 32 __drm_atomic_helper_plane_destroy_state(plane->state); 33 34 state = to_mtk_plane_state(plane->state); 35 memset(state, 0, sizeof(*state)); 36 } else { 37 state = kzalloc(sizeof(*state), GFP_KERNEL); 38 if (!state) 39 return; 40 plane->state = &state->base; 41 } 42 43 state->base.plane = plane; 44 state->pending.format = DRM_FORMAT_RGB565; 45 } 46 47 static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane) 48 { 49 struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state); 50 struct mtk_plane_state *state; 51 52 state = kzalloc(sizeof(*state), GFP_KERNEL); 53 if (!state) 54 return NULL; 55 56 __drm_atomic_helper_plane_duplicate_state(plane, &state->base); 57 58 WARN_ON(state->base.plane != plane); 59 60 state->pending = old_state->pending; 61 62 return &state->base; 63 } 64 65 static void mtk_drm_plane_destroy_state(struct drm_plane *plane, 66 struct drm_plane_state *state) 67 { 68 __drm_atomic_helper_plane_destroy_state(state); 69 kfree(to_mtk_plane_state(state)); 70 } 71 72 static const struct drm_plane_funcs mtk_plane_funcs = { 73 .update_plane = drm_atomic_helper_update_plane, 74 .disable_plane = drm_atomic_helper_disable_plane, 75 .destroy = drm_plane_cleanup, 76 .reset = mtk_plane_reset, 77 .atomic_duplicate_state = mtk_plane_duplicate_state, 78 .atomic_destroy_state = mtk_drm_plane_destroy_state, 79 }; 80 81 static int mtk_plane_atomic_check(struct drm_plane *plane, 82 struct drm_plane_state *state) 83 { 84 struct drm_framebuffer *fb = state->fb; 85 struct drm_crtc_state *crtc_state; 86 87 if (!fb) 88 return 0; 89 90 if (!state->crtc) 91 return 0; 92 93 crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc); 94 if (IS_ERR(crtc_state)) 95 return PTR_ERR(crtc_state); 96 97 return drm_atomic_helper_check_plane_state(state, crtc_state, 98 DRM_PLANE_HELPER_NO_SCALING, 99 DRM_PLANE_HELPER_NO_SCALING, 100 true, true); 101 } 102 103 static void mtk_plane_atomic_update(struct drm_plane *plane, 104 struct drm_plane_state *old_state) 105 { 106 struct mtk_plane_state *state = to_mtk_plane_state(plane->state); 107 struct drm_crtc *crtc = plane->state->crtc; 108 struct drm_framebuffer *fb = plane->state->fb; 109 struct drm_gem_object *gem; 110 struct mtk_drm_gem_obj *mtk_gem; 111 unsigned int pitch, format; 112 dma_addr_t addr; 113 114 if (!crtc || WARN_ON(!fb)) 115 return; 116 117 gem = fb->obj[0]; 118 mtk_gem = to_mtk_gem_obj(gem); 119 addr = mtk_gem->dma_addr; 120 pitch = fb->pitches[0]; 121 format = fb->format->format; 122 123 addr += (plane->state->src.x1 >> 16) * fb->format->cpp[0]; 124 addr += (plane->state->src.y1 >> 16) * pitch; 125 126 state->pending.enable = true; 127 state->pending.pitch = pitch; 128 state->pending.format = format; 129 state->pending.addr = addr; 130 state->pending.x = plane->state->dst.x1; 131 state->pending.y = plane->state->dst.y1; 132 state->pending.width = drm_rect_width(&plane->state->dst); 133 state->pending.height = drm_rect_height(&plane->state->dst); 134 wmb(); /* Make sure the above parameters are set before update */ 135 state->pending.dirty = true; 136 } 137 138 static void mtk_plane_atomic_disable(struct drm_plane *plane, 139 struct drm_plane_state *old_state) 140 { 141 struct mtk_plane_state *state = to_mtk_plane_state(plane->state); 142 143 state->pending.enable = false; 144 wmb(); /* Make sure the above parameter is set before update */ 145 state->pending.dirty = true; 146 } 147 148 static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = { 149 .atomic_check = mtk_plane_atomic_check, 150 .atomic_update = mtk_plane_atomic_update, 151 .atomic_disable = mtk_plane_atomic_disable, 152 }; 153 154 int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane, 155 unsigned long possible_crtcs, enum drm_plane_type type) 156 { 157 int err; 158 159 err = drm_universal_plane_init(dev, plane, possible_crtcs, 160 &mtk_plane_funcs, formats, 161 ARRAY_SIZE(formats), NULL, type, NULL); 162 if (err) { 163 DRM_ERROR("failed to initialize plane\n"); 164 return err; 165 } 166 167 drm_plane_helper_add(plane, &mtk_plane_helper_funcs); 168 169 return 0; 170 } 171