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_obj *obj = 132 exynos_drm_fb_gem_obj(state->fb, i); 133 134 if (!obj) { 135 DRM_DEBUG_KMS("gem object is null\n"); 136 return -EFAULT; 137 } 138 139 exynos_plane->dma_addr[i] = obj->dma_addr + 140 state->fb->offsets[i]; 141 142 DRM_DEBUG_KMS("buffer: %d, dma_addr = 0x%lx\n", 143 i, (unsigned long)exynos_plane->dma_addr[i]); 144 } 145 146 return 0; 147 } 148 149 static void exynos_plane_atomic_update(struct drm_plane *plane, 150 struct drm_plane_state *old_state) 151 { 152 struct drm_plane_state *state = plane->state; 153 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(state->crtc); 154 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 155 156 if (!state->crtc) 157 return; 158 159 exynos_plane_mode_set(plane, state->crtc, state->fb, 160 state->crtc_x, state->crtc_y, 161 state->crtc_w, state->crtc_h, 162 state->src_x >> 16, state->src_y >> 16, 163 state->src_w >> 16, state->src_h >> 16); 164 165 exynos_plane->pending_fb = state->fb; 166 167 if (exynos_crtc->ops->update_plane) 168 exynos_crtc->ops->update_plane(exynos_crtc, exynos_plane); 169 } 170 171 static void exynos_plane_atomic_disable(struct drm_plane *plane, 172 struct drm_plane_state *old_state) 173 { 174 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 175 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(old_state->crtc); 176 177 if (!old_state->crtc) 178 return; 179 180 if (exynos_crtc->ops->disable_plane) 181 exynos_crtc->ops->disable_plane(exynos_crtc, 182 exynos_plane); 183 } 184 185 static const struct drm_plane_helper_funcs plane_helper_funcs = { 186 .atomic_check = exynos_plane_atomic_check, 187 .atomic_update = exynos_plane_atomic_update, 188 .atomic_disable = exynos_plane_atomic_disable, 189 }; 190 191 static void exynos_plane_attach_zpos_property(struct drm_plane *plane, 192 unsigned int zpos) 193 { 194 struct drm_device *dev = plane->dev; 195 struct exynos_drm_private *dev_priv = dev->dev_private; 196 struct drm_property *prop; 197 198 prop = dev_priv->plane_zpos_property; 199 if (!prop) { 200 prop = drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, 201 "zpos", 0, MAX_PLANE - 1); 202 if (!prop) 203 return; 204 205 dev_priv->plane_zpos_property = prop; 206 } 207 208 drm_object_attach_property(&plane->base, prop, zpos); 209 } 210 211 int exynos_plane_init(struct drm_device *dev, 212 struct exynos_drm_plane *exynos_plane, 213 unsigned long possible_crtcs, enum drm_plane_type type, 214 const uint32_t *formats, unsigned int fcount, 215 unsigned int zpos) 216 { 217 int err; 218 219 err = drm_universal_plane_init(dev, &exynos_plane->base, possible_crtcs, 220 &exynos_plane_funcs, formats, fcount, 221 type); 222 if (err) { 223 DRM_ERROR("failed to initialize plane\n"); 224 return err; 225 } 226 227 drm_plane_helper_add(&exynos_plane->base, &plane_helper_funcs); 228 229 exynos_plane->zpos = zpos; 230 231 if (type == DRM_PLANE_TYPE_OVERLAY) 232 exynos_plane_attach_zpos_property(&exynos_plane->base, zpos); 233 234 return 0; 235 } 236