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