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 int 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 return 0; 59 } 60 61 static int sti_compositor_bind(struct device *dev, 62 struct device *master, 63 void *data) 64 { 65 struct sti_compositor *compo = dev_get_drvdata(dev); 66 struct drm_device *drm_dev = data; 67 unsigned int i, mixer_id = 0, vid_id = 0, crtc_id = 0; 68 struct sti_private *dev_priv = drm_dev->dev_private; 69 struct drm_plane *cursor = NULL; 70 struct drm_plane *primary = NULL; 71 struct sti_compositor_subdev_descriptor *desc = compo->data.subdev_desc; 72 unsigned int array_size = compo->data.nb_subdev; 73 74 dev_priv->compo = compo; 75 76 /* Register mixer subdev and video subdev first */ 77 for (i = 0; i < array_size; i++) { 78 switch (desc[i].type) { 79 case STI_VID_SUBDEV: 80 compo->vid[vid_id++] = 81 sti_vid_create(compo->dev, drm_dev, desc[i].id, 82 compo->regs + desc[i].offset); 83 break; 84 case STI_MIXER_MAIN_SUBDEV: 85 case STI_MIXER_AUX_SUBDEV: 86 compo->mixer[mixer_id++] = 87 sti_mixer_create(compo->dev, drm_dev, desc[i].id, 88 compo->regs + desc[i].offset); 89 break; 90 case STI_GPD_SUBDEV: 91 case STI_CURSOR_SUBDEV: 92 /* Nothing to do, wait for the second round */ 93 break; 94 default: 95 DRM_ERROR("Unknown subdev component type\n"); 96 return 1; 97 } 98 } 99 100 /* Register the other subdevs, create crtc and planes */ 101 for (i = 0; i < array_size; i++) { 102 enum drm_plane_type plane_type = DRM_PLANE_TYPE_OVERLAY; 103 104 if (crtc_id < mixer_id) 105 plane_type = DRM_PLANE_TYPE_PRIMARY; 106 107 switch (desc[i].type) { 108 case STI_MIXER_MAIN_SUBDEV: 109 case STI_MIXER_AUX_SUBDEV: 110 case STI_VID_SUBDEV: 111 /* Nothing to do, already done at the first round */ 112 break; 113 case STI_CURSOR_SUBDEV: 114 cursor = sti_cursor_create(drm_dev, compo->dev, 115 desc[i].id, 116 compo->regs + desc[i].offset, 117 1); 118 if (!cursor) { 119 DRM_ERROR("Can't create CURSOR plane\n"); 120 break; 121 } 122 break; 123 case STI_GPD_SUBDEV: 124 primary = sti_gdp_create(drm_dev, compo->dev, 125 desc[i].id, 126 compo->regs + desc[i].offset, 127 (1 << mixer_id) - 1, 128 plane_type); 129 if (!primary) { 130 DRM_ERROR("Can't create GDP plane\n"); 131 break; 132 } 133 break; 134 default: 135 DRM_ERROR("Unknown subdev component type\n"); 136 return 1; 137 } 138 139 /* The first planes are reserved for primary planes*/ 140 if (crtc_id < mixer_id && primary) { 141 sti_crtc_init(drm_dev, compo->mixer[crtc_id], 142 primary, cursor); 143 crtc_id++; 144 cursor = NULL; 145 primary = NULL; 146 } 147 } 148 149 drm_vblank_init(drm_dev, crtc_id); 150 /* Allow usage of vblank without having to call drm_irq_install */ 151 drm_dev->irq_enabled = 1; 152 153 return 0; 154 } 155 156 static void sti_compositor_unbind(struct device *dev, struct device *master, 157 void *data) 158 { 159 /* do nothing */ 160 } 161 162 static const struct component_ops sti_compositor_ops = { 163 .bind = sti_compositor_bind, 164 .unbind = sti_compositor_unbind, 165 }; 166 167 static const struct of_device_id compositor_of_match[] = { 168 { 169 .compatible = "st,stih407-compositor", 170 .data = &stih407_compositor_data, 171 }, { 172 /* end node */ 173 } 174 }; 175 MODULE_DEVICE_TABLE(of, compositor_of_match); 176 177 static int sti_compositor_probe(struct platform_device *pdev) 178 { 179 struct device *dev = &pdev->dev; 180 struct device_node *np = dev->of_node; 181 struct device_node *vtg_np; 182 struct sti_compositor *compo; 183 struct resource *res; 184 unsigned int i; 185 186 compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL); 187 if (!compo) { 188 DRM_ERROR("Failed to allocate compositor context\n"); 189 return -ENOMEM; 190 } 191 compo->dev = dev; 192 for (i = 0; i < STI_MAX_MIXER; i++) 193 compo->vtg_vblank_nb[i].notifier_call = sti_crtc_vblank_cb; 194 195 /* populate data structure depending on compatibility */ 196 BUG_ON(!of_match_node(compositor_of_match, np)->data); 197 198 memcpy(&compo->data, of_match_node(compositor_of_match, np)->data, 199 sizeof(struct sti_compositor_data)); 200 201 /* Get Memory ressources */ 202 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 203 if (res == NULL) { 204 DRM_ERROR("Get memory resource failed\n"); 205 return -ENXIO; 206 } 207 compo->regs = devm_ioremap(dev, res->start, resource_size(res)); 208 if (compo->regs == NULL) { 209 DRM_ERROR("Register mapping failed\n"); 210 return -ENXIO; 211 } 212 213 /* Get clock resources */ 214 compo->clk_compo_main = devm_clk_get(dev, "compo_main"); 215 if (IS_ERR(compo->clk_compo_main)) { 216 DRM_ERROR("Cannot get compo_main clock\n"); 217 return PTR_ERR(compo->clk_compo_main); 218 } 219 220 compo->clk_compo_aux = devm_clk_get(dev, "compo_aux"); 221 if (IS_ERR(compo->clk_compo_aux)) { 222 DRM_ERROR("Cannot get compo_aux clock\n"); 223 return PTR_ERR(compo->clk_compo_aux); 224 } 225 226 compo->clk_pix_main = devm_clk_get(dev, "pix_main"); 227 if (IS_ERR(compo->clk_pix_main)) { 228 DRM_ERROR("Cannot get pix_main clock\n"); 229 return PTR_ERR(compo->clk_pix_main); 230 } 231 232 compo->clk_pix_aux = devm_clk_get(dev, "pix_aux"); 233 if (IS_ERR(compo->clk_pix_aux)) { 234 DRM_ERROR("Cannot get pix_aux clock\n"); 235 return PTR_ERR(compo->clk_pix_aux); 236 } 237 238 /* Get reset resources */ 239 compo->rst_main = devm_reset_control_get_shared(dev, "compo-main"); 240 /* Take compo main out of reset */ 241 if (!IS_ERR(compo->rst_main)) 242 reset_control_deassert(compo->rst_main); 243 244 compo->rst_aux = devm_reset_control_get_shared(dev, "compo-aux"); 245 /* Take compo aux out of reset */ 246 if (!IS_ERR(compo->rst_aux)) 247 reset_control_deassert(compo->rst_aux); 248 249 vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0); 250 if (vtg_np) 251 compo->vtg[STI_MIXER_MAIN] = of_vtg_find(vtg_np); 252 of_node_put(vtg_np); 253 254 vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1); 255 if (vtg_np) 256 compo->vtg[STI_MIXER_AUX] = of_vtg_find(vtg_np); 257 of_node_put(vtg_np); 258 259 platform_set_drvdata(pdev, compo); 260 261 return component_add(&pdev->dev, &sti_compositor_ops); 262 } 263 264 static int sti_compositor_remove(struct platform_device *pdev) 265 { 266 component_del(&pdev->dev, &sti_compositor_ops); 267 return 0; 268 } 269 270 struct platform_driver sti_compositor_driver = { 271 .driver = { 272 .name = "sti-compositor", 273 .of_match_table = compositor_of_match, 274 }, 275 .probe = sti_compositor_probe, 276 .remove = sti_compositor_remove, 277 }; 278 279 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>"); 280 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver"); 281 MODULE_LICENSE("GPL"); 282