1 /* 2 * Copyright (c) 2015 MediaTek Inc. 3 * Author: CK Hu <ck.hu@mediatek.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 */ 14 15 #include <drm/drmP.h> 16 #include <drm/drm_atomic.h> 17 #include <drm/drm_atomic_helper.h> 18 #include <drm/drm_plane_helper.h> 19 20 #include "mtk_drm_crtc.h" 21 #include "mtk_drm_ddp_comp.h" 22 #include "mtk_drm_drv.h" 23 #include "mtk_drm_fb.h" 24 #include "mtk_drm_gem.h" 25 #include "mtk_drm_plane.h" 26 27 static const u32 formats[] = { 28 DRM_FORMAT_XRGB8888, 29 DRM_FORMAT_ARGB8888, 30 DRM_FORMAT_RGB565, 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 struct drm_rect clip = { 0, }; 93 94 if (!fb) 95 return 0; 96 97 if (!mtk_fb_get_gem_obj(fb)) { 98 DRM_DEBUG_KMS("buffer is null\n"); 99 return -EFAULT; 100 } 101 102 if (!state->crtc) 103 return 0; 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 clip.x2 = crtc_state->mode.hdisplay; 110 clip.y2 = crtc_state->mode.vdisplay; 111 112 return drm_plane_helper_check_state(state, &clip, 113 DRM_PLANE_HELPER_NO_SCALING, 114 DRM_PLANE_HELPER_NO_SCALING, 115 true, true); 116 } 117 118 static void mtk_plane_atomic_update(struct drm_plane *plane, 119 struct drm_plane_state *old_state) 120 { 121 struct mtk_plane_state *state = to_mtk_plane_state(plane->state); 122 struct drm_crtc *crtc = plane->state->crtc; 123 struct drm_framebuffer *fb = plane->state->fb; 124 struct drm_gem_object *gem; 125 struct mtk_drm_gem_obj *mtk_gem; 126 unsigned int pitch, format; 127 dma_addr_t addr; 128 129 if (!crtc || WARN_ON(!fb)) 130 return; 131 132 gem = mtk_fb_get_gem_obj(fb); 133 mtk_gem = to_mtk_gem_obj(gem); 134 addr = mtk_gem->dma_addr; 135 pitch = fb->pitches[0]; 136 format = fb->format->format; 137 138 addr += (plane->state->src.x1 >> 16) * fb->format->cpp[0]; 139 addr += (plane->state->src.y1 >> 16) * pitch; 140 141 state->pending.enable = true; 142 state->pending.pitch = pitch; 143 state->pending.format = format; 144 state->pending.addr = addr; 145 state->pending.x = plane->state->dst.x1; 146 state->pending.y = plane->state->dst.y1; 147 state->pending.width = drm_rect_width(&plane->state->dst); 148 state->pending.height = drm_rect_height(&plane->state->dst); 149 wmb(); /* Make sure the above parameters are set before update */ 150 state->pending.dirty = true; 151 } 152 153 static void mtk_plane_atomic_disable(struct drm_plane *plane, 154 struct drm_plane_state *old_state) 155 { 156 struct mtk_plane_state *state = to_mtk_plane_state(plane->state); 157 158 state->pending.enable = false; 159 wmb(); /* Make sure the above parameter is set before update */ 160 state->pending.dirty = true; 161 } 162 163 static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = { 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 { 172 int err; 173 174 err = drm_universal_plane_init(dev, plane, possible_crtcs, 175 &mtk_plane_funcs, formats, 176 ARRAY_SIZE(formats), type, NULL); 177 if (err) { 178 DRM_ERROR("failed to initialize plane\n"); 179 return err; 180 } 181 182 drm_plane_helper_add(plane, &mtk_plane_helper_funcs); 183 184 return 0; 185 } 186