1 /* 2 * Copyright 2015 Freescale Semiconductor, Inc. 3 * 4 * Freescale DCU drm device driver 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 */ 11 12 #include <linux/regmap.h> 13 14 #include <drm/drmP.h> 15 #include <drm/drm_atomic_helper.h> 16 #include <drm/drm_crtc.h> 17 #include <drm/drm_crtc_helper.h> 18 #include <drm/drm_fb_cma_helper.h> 19 #include <drm/drm_gem_cma_helper.h> 20 #include <drm/drm_plane_helper.h> 21 22 #include "fsl_dcu_drm_drv.h" 23 #include "fsl_dcu_drm_plane.h" 24 25 static int fsl_dcu_drm_plane_index(struct drm_plane *plane) 26 { 27 struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private; 28 unsigned int total_layer = fsl_dev->soc->total_layer; 29 unsigned int index; 30 31 index = drm_plane_index(plane); 32 if (index < total_layer) 33 return total_layer - index - 1; 34 35 dev_err(fsl_dev->dev, "No more layer left\n"); 36 return -EINVAL; 37 } 38 39 static int fsl_dcu_drm_plane_atomic_check(struct drm_plane *plane, 40 struct drm_plane_state *state) 41 { 42 struct drm_framebuffer *fb = state->fb; 43 44 switch (fb->pixel_format) { 45 case DRM_FORMAT_RGB565: 46 case DRM_FORMAT_RGB888: 47 case DRM_FORMAT_ARGB8888: 48 case DRM_FORMAT_BGRA4444: 49 case DRM_FORMAT_ARGB1555: 50 case DRM_FORMAT_YUV422: 51 return 0; 52 default: 53 return -EINVAL; 54 } 55 } 56 57 static void fsl_dcu_drm_plane_atomic_disable(struct drm_plane *plane, 58 struct drm_plane_state *old_state) 59 { 60 struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private; 61 unsigned int index, value, ret; 62 63 index = fsl_dcu_drm_plane_index(plane); 64 if (index < 0) 65 return; 66 67 ret = regmap_read(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), &value); 68 if (ret) 69 dev_err(fsl_dev->dev, "read DCU_INT_MASK failed\n"); 70 value &= ~DCU_LAYER_EN; 71 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), value); 72 if (ret) 73 dev_err(fsl_dev->dev, "set DCU register failed\n"); 74 } 75 76 static void fsl_dcu_drm_plane_atomic_update(struct drm_plane *plane, 77 struct drm_plane_state *old_state) 78 79 { 80 struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private; 81 struct drm_plane_state *state = plane->state; 82 struct drm_framebuffer *fb = plane->state->fb; 83 struct drm_gem_cma_object *gem; 84 unsigned int alpha, bpp; 85 int index, ret; 86 87 if (!fb) 88 return; 89 90 index = fsl_dcu_drm_plane_index(plane); 91 if (index < 0) 92 return; 93 94 gem = drm_fb_cma_get_gem_obj(fb, 0); 95 96 switch (fb->pixel_format) { 97 case DRM_FORMAT_RGB565: 98 bpp = FSL_DCU_RGB565; 99 alpha = 0xff; 100 break; 101 case DRM_FORMAT_RGB888: 102 bpp = FSL_DCU_RGB888; 103 alpha = 0xff; 104 break; 105 case DRM_FORMAT_ARGB8888: 106 bpp = FSL_DCU_ARGB8888; 107 alpha = 0xff; 108 break; 109 case DRM_FORMAT_BGRA4444: 110 bpp = FSL_DCU_ARGB4444; 111 alpha = 0xff; 112 break; 113 case DRM_FORMAT_ARGB1555: 114 bpp = FSL_DCU_ARGB1555; 115 alpha = 0xff; 116 break; 117 case DRM_FORMAT_YUV422: 118 bpp = FSL_DCU_YUV422; 119 alpha = 0xff; 120 break; 121 default: 122 return; 123 } 124 125 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 1), 126 DCU_LAYER_HEIGHT(state->crtc_h) | 127 DCU_LAYER_WIDTH(state->crtc_w)); 128 if (ret) 129 goto set_failed; 130 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 2), 131 DCU_LAYER_POSY(state->crtc_y) | 132 DCU_LAYER_POSX(state->crtc_x)); 133 if (ret) 134 goto set_failed; 135 ret = regmap_write(fsl_dev->regmap, 136 DCU_CTRLDESCLN(index, 3), gem->paddr); 137 if (ret) 138 goto set_failed; 139 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), 140 DCU_LAYER_EN | 141 DCU_LAYER_TRANS(alpha) | 142 DCU_LAYER_BPP(bpp) | 143 DCU_LAYER_AB(0)); 144 if (ret) 145 goto set_failed; 146 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 5), 147 DCU_LAYER_CKMAX_R(0xFF) | 148 DCU_LAYER_CKMAX_G(0xFF) | 149 DCU_LAYER_CKMAX_B(0xFF)); 150 if (ret) 151 goto set_failed; 152 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 6), 153 DCU_LAYER_CKMIN_R(0) | 154 DCU_LAYER_CKMIN_G(0) | 155 DCU_LAYER_CKMIN_B(0)); 156 if (ret) 157 goto set_failed; 158 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 7), 0); 159 if (ret) 160 goto set_failed; 161 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 8), 162 DCU_LAYER_FG_FCOLOR(0)); 163 if (ret) 164 goto set_failed; 165 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 9), 166 DCU_LAYER_BG_BCOLOR(0)); 167 if (ret) 168 goto set_failed; 169 if (!strcmp(fsl_dev->soc->name, "ls1021a")) { 170 ret = regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 10), 171 DCU_LAYER_POST_SKIP(0) | 172 DCU_LAYER_PRE_SKIP(0)); 173 if (ret) 174 goto set_failed; 175 } 176 ret = regmap_update_bits(fsl_dev->regmap, DCU_DCU_MODE, 177 DCU_MODE_DCU_MODE_MASK, 178 DCU_MODE_DCU_MODE(DCU_MODE_NORMAL)); 179 if (ret) 180 goto set_failed; 181 ret = regmap_write(fsl_dev->regmap, 182 DCU_UPDATE_MODE, DCU_UPDATE_MODE_READREG); 183 if (ret) 184 goto set_failed; 185 return; 186 187 set_failed: 188 dev_err(fsl_dev->dev, "set DCU register failed\n"); 189 } 190 191 static void 192 fsl_dcu_drm_plane_cleanup_fb(struct drm_plane *plane, 193 struct drm_framebuffer *fb, 194 const struct drm_plane_state *new_state) 195 { 196 } 197 198 static int 199 fsl_dcu_drm_plane_prepare_fb(struct drm_plane *plane, 200 struct drm_framebuffer *fb, 201 const struct drm_plane_state *new_state) 202 { 203 return 0; 204 } 205 206 static const struct drm_plane_helper_funcs fsl_dcu_drm_plane_helper_funcs = { 207 .atomic_check = fsl_dcu_drm_plane_atomic_check, 208 .atomic_disable = fsl_dcu_drm_plane_atomic_disable, 209 .atomic_update = fsl_dcu_drm_plane_atomic_update, 210 .cleanup_fb = fsl_dcu_drm_plane_cleanup_fb, 211 .prepare_fb = fsl_dcu_drm_plane_prepare_fb, 212 }; 213 214 static void fsl_dcu_drm_plane_destroy(struct drm_plane *plane) 215 { 216 drm_plane_cleanup(plane); 217 } 218 219 static const struct drm_plane_funcs fsl_dcu_drm_plane_funcs = { 220 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, 221 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, 222 .destroy = fsl_dcu_drm_plane_destroy, 223 .disable_plane = drm_atomic_helper_disable_plane, 224 .reset = drm_atomic_helper_plane_reset, 225 .update_plane = drm_atomic_helper_update_plane, 226 }; 227 228 static const u32 fsl_dcu_drm_plane_formats[] = { 229 DRM_FORMAT_RGB565, 230 DRM_FORMAT_RGB888, 231 DRM_FORMAT_ARGB8888, 232 DRM_FORMAT_ARGB4444, 233 DRM_FORMAT_ARGB1555, 234 DRM_FORMAT_YUV422, 235 }; 236 237 struct drm_plane *fsl_dcu_drm_primary_create_plane(struct drm_device *dev) 238 { 239 struct drm_plane *primary; 240 int ret; 241 242 primary = kzalloc(sizeof(*primary), GFP_KERNEL); 243 if (!primary) { 244 DRM_DEBUG_KMS("Failed to allocate primary plane\n"); 245 return NULL; 246 } 247 248 /* possible_crtc's will be filled in later by crtc_init */ 249 ret = drm_universal_plane_init(dev, primary, 0, 250 &fsl_dcu_drm_plane_funcs, 251 fsl_dcu_drm_plane_formats, 252 ARRAY_SIZE(fsl_dcu_drm_plane_formats), 253 DRM_PLANE_TYPE_PRIMARY); 254 if (ret) { 255 kfree(primary); 256 primary = NULL; 257 } 258 drm_plane_helper_add(primary, &fsl_dcu_drm_plane_helper_funcs); 259 260 return primary; 261 } 262