1 /* 2 * Copyright (C) 2011 Samsung Electronics Co.Ltd 3 * Authors: Joonyoung Shim <jy0922.shim@samsung.com> 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License as published by the 7 * Free Software Foundation; either version 2 of the License, or (at your 8 * option) any later version. 9 * 10 */ 11 12 #include <drm/drmP.h> 13 14 #include <drm/exynos_drm.h> 15 #include <drm/drm_plane_helper.h> 16 #include <drm/drm_atomic_helper.h> 17 #include "exynos_drm_drv.h" 18 #include "exynos_drm_crtc.h" 19 #include "exynos_drm_fb.h" 20 #include "exynos_drm_gem.h" 21 #include "exynos_drm_plane.h" 22 23 /* 24 * This function is to get X or Y size shown via screen. This needs length and 25 * start position of CRTC. 26 * 27 * <--- length ---> 28 * CRTC ---------------- 29 * ^ start ^ end 30 * 31 * There are six cases from a to f. 32 * 33 * <----- SCREEN -----> 34 * 0 last 35 * ----------|------------------|---------- 36 * CRTCs 37 * a ------- 38 * b ------- 39 * c -------------------------- 40 * d -------- 41 * e ------- 42 * f ------- 43 */ 44 static int exynos_plane_get_size(int start, unsigned length, unsigned last) 45 { 46 int end = start + length; 47 int size = 0; 48 49 if (start <= 0) { 50 if (end > 0) 51 size = min_t(unsigned, end, last); 52 } else if (start <= last) { 53 size = min_t(unsigned, last - start, length); 54 } 55 56 return size; 57 } 58 59 static void exynos_plane_mode_set(struct drm_plane *plane, 60 struct drm_crtc *crtc, 61 struct drm_framebuffer *fb, 62 int crtc_x, int crtc_y, 63 unsigned int crtc_w, unsigned int crtc_h, 64 uint32_t src_x, uint32_t src_y, 65 uint32_t src_w, uint32_t src_h) 66 { 67 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 68 struct drm_display_mode *mode = &crtc->state->adjusted_mode; 69 unsigned int actual_w; 70 unsigned int actual_h; 71 72 actual_w = exynos_plane_get_size(crtc_x, crtc_w, mode->hdisplay); 73 actual_h = exynos_plane_get_size(crtc_y, crtc_h, mode->vdisplay); 74 75 if (crtc_x < 0) { 76 if (actual_w) 77 src_x -= crtc_x; 78 crtc_x = 0; 79 } 80 81 if (crtc_y < 0) { 82 if (actual_h) 83 src_y -= crtc_y; 84 crtc_y = 0; 85 } 86 87 /* set ratio */ 88 exynos_plane->h_ratio = (src_w << 16) / crtc_w; 89 exynos_plane->v_ratio = (src_h << 16) / crtc_h; 90 91 /* set drm framebuffer data. */ 92 exynos_plane->src_x = src_x; 93 exynos_plane->src_y = src_y; 94 exynos_plane->src_w = (actual_w * exynos_plane->h_ratio) >> 16; 95 exynos_plane->src_h = (actual_h * exynos_plane->v_ratio) >> 16; 96 97 /* set plane range to be displayed. */ 98 exynos_plane->crtc_x = crtc_x; 99 exynos_plane->crtc_y = crtc_y; 100 exynos_plane->crtc_w = actual_w; 101 exynos_plane->crtc_h = actual_h; 102 103 DRM_DEBUG_KMS("plane : offset_x/y(%d,%d), width/height(%d,%d)", 104 exynos_plane->crtc_x, exynos_plane->crtc_y, 105 exynos_plane->crtc_w, exynos_plane->crtc_h); 106 107 plane->crtc = crtc; 108 } 109 110 static struct drm_plane_funcs exynos_plane_funcs = { 111 .update_plane = drm_atomic_helper_update_plane, 112 .disable_plane = drm_atomic_helper_disable_plane, 113 .destroy = drm_plane_cleanup, 114 .reset = drm_atomic_helper_plane_reset, 115 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, 116 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, 117 }; 118 119 static int exynos_plane_atomic_check(struct drm_plane *plane, 120 struct drm_plane_state *state) 121 { 122 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 123 int nr; 124 int i; 125 126 if (!state->fb) 127 return 0; 128 129 nr = drm_format_num_planes(state->fb->pixel_format); 130 for (i = 0; i < nr; i++) { 131 struct exynos_drm_gem *exynos_gem = 132 exynos_drm_fb_gem(state->fb, i); 133 if (!exynos_gem) { 134 DRM_DEBUG_KMS("gem object is null\n"); 135 return -EFAULT; 136 } 137 138 exynos_plane->dma_addr[i] = exynos_gem->dma_addr + 139 state->fb->offsets[i]; 140 141 DRM_DEBUG_KMS("buffer: %d, dma_addr = 0x%lx\n", 142 i, (unsigned long)exynos_plane->dma_addr[i]); 143 } 144 145 return 0; 146 } 147 148 static void exynos_plane_atomic_update(struct drm_plane *plane, 149 struct drm_plane_state *old_state) 150 { 151 struct drm_plane_state *state = plane->state; 152 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(state->crtc); 153 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 154 155 if (!state->crtc) 156 return; 157 158 exynos_plane_mode_set(plane, state->crtc, state->fb, 159 state->crtc_x, state->crtc_y, 160 state->crtc_w, state->crtc_h, 161 state->src_x >> 16, state->src_y >> 16, 162 state->src_w >> 16, state->src_h >> 16); 163 164 exynos_plane->pending_fb = state->fb; 165 166 if (exynos_crtc->ops->update_plane) 167 exynos_crtc->ops->update_plane(exynos_crtc, exynos_plane); 168 } 169 170 static void exynos_plane_atomic_disable(struct drm_plane *plane, 171 struct drm_plane_state *old_state) 172 { 173 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 174 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(old_state->crtc); 175 176 if (!old_state->crtc) 177 return; 178 179 if (exynos_crtc->ops->disable_plane) 180 exynos_crtc->ops->disable_plane(exynos_crtc, 181 exynos_plane); 182 } 183 184 static const struct drm_plane_helper_funcs plane_helper_funcs = { 185 .atomic_check = exynos_plane_atomic_check, 186 .atomic_update = exynos_plane_atomic_update, 187 .atomic_disable = exynos_plane_atomic_disable, 188 }; 189 190 static void exynos_plane_attach_zpos_property(struct drm_plane *plane, 191 unsigned int zpos) 192 { 193 struct drm_device *dev = plane->dev; 194 struct exynos_drm_private *dev_priv = dev->dev_private; 195 struct drm_property *prop; 196 197 prop = dev_priv->plane_zpos_property; 198 if (!prop) { 199 prop = drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, 200 "zpos", 0, MAX_PLANE - 1); 201 if (!prop) 202 return; 203 204 dev_priv->plane_zpos_property = prop; 205 } 206 207 drm_object_attach_property(&plane->base, prop, zpos); 208 } 209 210 enum drm_plane_type exynos_plane_get_type(unsigned int zpos, 211 unsigned int cursor_win) 212 { 213 if (zpos == DEFAULT_WIN) 214 return DRM_PLANE_TYPE_PRIMARY; 215 else if (zpos == cursor_win) 216 return DRM_PLANE_TYPE_CURSOR; 217 else 218 return DRM_PLANE_TYPE_OVERLAY; 219 } 220 221 int exynos_plane_init(struct drm_device *dev, 222 struct exynos_drm_plane *exynos_plane, 223 unsigned long possible_crtcs, enum drm_plane_type type, 224 const uint32_t *formats, unsigned int fcount, 225 unsigned int zpos) 226 { 227 int err; 228 229 err = drm_universal_plane_init(dev, &exynos_plane->base, possible_crtcs, 230 &exynos_plane_funcs, formats, fcount, 231 type); 232 if (err) { 233 DRM_ERROR("failed to initialize plane\n"); 234 return err; 235 } 236 237 drm_plane_helper_add(&exynos_plane->base, &plane_helper_funcs); 238 239 exynos_plane->zpos = zpos; 240 241 if (type == DRM_PLANE_TYPE_OVERLAY) 242 exynos_plane_attach_zpos_property(&exynos_plane->base, zpos); 243 244 return 0; 245 } 246