1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) STMicroelectronics SA 2014 4 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com> 5 * Fabien Dessenne <fabien.dessenne@st.com> 6 * for STMicroelectronics. 7 */ 8 9 #include <linux/component.h> 10 #include <linux/io.h> 11 #include <linux/module.h> 12 #include <linux/platform_device.h> 13 #include <linux/reset.h> 14 15 #include <drm/drm_device.h> 16 #include <drm/drm_print.h> 17 #include <drm/drm_vblank.h> 18 19 #include "sti_compositor.h" 20 #include "sti_crtc.h" 21 #include "sti_cursor.h" 22 #include "sti_drv.h" 23 #include "sti_gdp.h" 24 #include "sti_plane.h" 25 #include "sti_vid.h" 26 #include "sti_vtg.h" 27 28 /* 29 * stiH407 compositor properties 30 */ 31 static const struct sti_compositor_data stih407_compositor_data = { 32 .nb_subdev = 8, 33 .subdev_desc = { 34 {STI_CURSOR_SUBDEV, (int)STI_CURSOR, 0x000}, 35 {STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100}, 36 {STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200}, 37 {STI_GPD_SUBDEV, (int)STI_GDP_2, 0x300}, 38 {STI_GPD_SUBDEV, (int)STI_GDP_3, 0x400}, 39 {STI_VID_SUBDEV, (int)STI_HQVDP_0, 0x700}, 40 {STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00}, 41 {STI_MIXER_AUX_SUBDEV, STI_MIXER_AUX, 0xD00}, 42 }, 43 }; 44 45 void sti_compositor_debugfs_init(struct sti_compositor *compo, 46 struct drm_minor *minor) 47 { 48 unsigned int i; 49 50 for (i = 0; i < STI_MAX_VID; i++) 51 if (compo->vid[i]) 52 vid_debugfs_init(compo->vid[i], minor); 53 54 for (i = 0; i < STI_MAX_MIXER; i++) 55 if (compo->mixer[i]) 56 sti_mixer_debugfs_init(compo->mixer[i], minor); 57 } 58 59 static int sti_compositor_bind(struct device *dev, 60 struct device *master, 61 void *data) 62 { 63 struct sti_compositor *compo = dev_get_drvdata(dev); 64 struct drm_device *drm_dev = data; 65 unsigned int i, mixer_id = 0, vid_id = 0, crtc_id = 0; 66 struct sti_private *dev_priv = drm_dev->dev_private; 67 struct drm_plane *cursor = NULL; 68 struct drm_plane *primary = NULL; 69 struct sti_compositor_subdev_descriptor *desc = compo->data.subdev_desc; 70 unsigned int array_size = compo->data.nb_subdev; 71 72 dev_priv->compo = compo; 73 74 /* Register mixer subdev and video subdev first */ 75 for (i = 0; i < array_size; i++) { 76 switch (desc[i].type) { 77 case STI_VID_SUBDEV: 78 compo->vid[vid_id++] = 79 sti_vid_create(compo->dev, drm_dev, desc[i].id, 80 compo->regs + desc[i].offset); 81 break; 82 case STI_MIXER_MAIN_SUBDEV: 83 case STI_MIXER_AUX_SUBDEV: 84 compo->mixer[mixer_id++] = 85 sti_mixer_create(compo->dev, drm_dev, desc[i].id, 86 compo->regs + desc[i].offset); 87 break; 88 case STI_GPD_SUBDEV: 89 case STI_CURSOR_SUBDEV: 90 /* Nothing to do, wait for the second round */ 91 break; 92 default: 93 DRM_ERROR("Unknown subdev component type\n"); 94 return 1; 95 } 96 } 97 98 /* Register the other subdevs, create crtc and planes */ 99 for (i = 0; i < array_size; i++) { 100 enum drm_plane_type plane_type = DRM_PLANE_TYPE_OVERLAY; 101 102 if (crtc_id < mixer_id) 103 plane_type = DRM_PLANE_TYPE_PRIMARY; 104 105 switch (desc[i].type) { 106 case STI_MIXER_MAIN_SUBDEV: 107 case STI_MIXER_AUX_SUBDEV: 108 case STI_VID_SUBDEV: 109 /* Nothing to do, already done at the first round */ 110 break; 111 case STI_CURSOR_SUBDEV: 112 cursor = sti_cursor_create(drm_dev, compo->dev, 113 desc[i].id, 114 compo->regs + desc[i].offset, 115 1); 116 if (!cursor) { 117 DRM_ERROR("Can't create CURSOR plane\n"); 118 break; 119 } 120 break; 121 case STI_GPD_SUBDEV: 122 primary = sti_gdp_create(drm_dev, compo->dev, 123 desc[i].id, 124 compo->regs + desc[i].offset, 125 (1 << mixer_id) - 1, 126 plane_type); 127 if (!primary) { 128 DRM_ERROR("Can't create GDP plane\n"); 129 break; 130 } 131 break; 132 default: 133 DRM_ERROR("Unknown subdev component type\n"); 134 return 1; 135 } 136 137 /* The first planes are reserved for primary planes*/ 138 if (crtc_id < mixer_id && primary) { 139 sti_crtc_init(drm_dev, compo->mixer[crtc_id], 140 primary, cursor); 141 crtc_id++; 142 cursor = NULL; 143 primary = NULL; 144 } 145 } 146 147 drm_vblank_init(drm_dev, crtc_id); 148 149 return 0; 150 } 151 152 static void sti_compositor_unbind(struct device *dev, struct device *master, 153 void *data) 154 { 155 /* do nothing */ 156 } 157 158 static const struct component_ops sti_compositor_ops = { 159 .bind = sti_compositor_bind, 160 .unbind = sti_compositor_unbind, 161 }; 162 163 static const struct of_device_id compositor_of_match[] = { 164 { 165 .compatible = "st,stih407-compositor", 166 .data = &stih407_compositor_data, 167 }, { 168 /* end node */ 169 } 170 }; 171 MODULE_DEVICE_TABLE(of, compositor_of_match); 172 173 static int sti_compositor_probe(struct platform_device *pdev) 174 { 175 struct device *dev = &pdev->dev; 176 struct device_node *np = dev->of_node; 177 struct device_node *vtg_np; 178 struct sti_compositor *compo; 179 struct resource *res; 180 unsigned int i; 181 182 compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL); 183 if (!compo) { 184 DRM_ERROR("Failed to allocate compositor context\n"); 185 return -ENOMEM; 186 } 187 compo->dev = dev; 188 for (i = 0; i < STI_MAX_MIXER; i++) 189 compo->vtg_vblank_nb[i].notifier_call = sti_crtc_vblank_cb; 190 191 /* populate data structure depending on compatibility */ 192 BUG_ON(!of_match_node(compositor_of_match, np)->data); 193 194 memcpy(&compo->data, of_match_node(compositor_of_match, np)->data, 195 sizeof(struct sti_compositor_data)); 196 197 /* Get Memory ressources */ 198 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 199 if (res == NULL) { 200 DRM_ERROR("Get memory resource failed\n"); 201 return -ENXIO; 202 } 203 compo->regs = devm_ioremap(dev, res->start, resource_size(res)); 204 if (compo->regs == NULL) { 205 DRM_ERROR("Register mapping failed\n"); 206 return -ENXIO; 207 } 208 209 /* Get clock resources */ 210 compo->clk_compo_main = devm_clk_get(dev, "compo_main"); 211 if (IS_ERR(compo->clk_compo_main)) { 212 DRM_ERROR("Cannot get compo_main clock\n"); 213 return PTR_ERR(compo->clk_compo_main); 214 } 215 216 compo->clk_compo_aux = devm_clk_get(dev, "compo_aux"); 217 if (IS_ERR(compo->clk_compo_aux)) { 218 DRM_ERROR("Cannot get compo_aux clock\n"); 219 return PTR_ERR(compo->clk_compo_aux); 220 } 221 222 compo->clk_pix_main = devm_clk_get(dev, "pix_main"); 223 if (IS_ERR(compo->clk_pix_main)) { 224 DRM_ERROR("Cannot get pix_main clock\n"); 225 return PTR_ERR(compo->clk_pix_main); 226 } 227 228 compo->clk_pix_aux = devm_clk_get(dev, "pix_aux"); 229 if (IS_ERR(compo->clk_pix_aux)) { 230 DRM_ERROR("Cannot get pix_aux clock\n"); 231 return PTR_ERR(compo->clk_pix_aux); 232 } 233 234 /* Get reset resources */ 235 compo->rst_main = devm_reset_control_get_shared(dev, "compo-main"); 236 /* Take compo main out of reset */ 237 if (!IS_ERR(compo->rst_main)) 238 reset_control_deassert(compo->rst_main); 239 240 compo->rst_aux = devm_reset_control_get_shared(dev, "compo-aux"); 241 /* Take compo aux out of reset */ 242 if (!IS_ERR(compo->rst_aux)) 243 reset_control_deassert(compo->rst_aux); 244 245 vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0); 246 if (vtg_np) 247 compo->vtg[STI_MIXER_MAIN] = of_vtg_find(vtg_np); 248 of_node_put(vtg_np); 249 250 vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1); 251 if (vtg_np) 252 compo->vtg[STI_MIXER_AUX] = of_vtg_find(vtg_np); 253 of_node_put(vtg_np); 254 255 platform_set_drvdata(pdev, compo); 256 257 return component_add(&pdev->dev, &sti_compositor_ops); 258 } 259 260 static int sti_compositor_remove(struct platform_device *pdev) 261 { 262 component_del(&pdev->dev, &sti_compositor_ops); 263 return 0; 264 } 265 266 struct platform_driver sti_compositor_driver = { 267 .driver = { 268 .name = "sti-compositor", 269 .of_match_table = compositor_of_match, 270 }, 271 .probe = sti_compositor_probe, 272 .remove = sti_compositor_remove, 273 }; 274 275 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>"); 276 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver"); 277 MODULE_LICENSE("GPL"); 278