1 /* 2 * Copyright (C) 2015 Free Electrons 3 * Copyright (C) 2015 NextThing Co 4 * 5 * Maxime Ripard <maxime.ripard@free-electrons.com> 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License as 9 * published by the Free Software Foundation; either version 2 of 10 * the License, or (at your option) any later version. 11 */ 12 13 #include <drm/drmP.h> 14 #include <drm/drm_atomic_helper.h> 15 #include <drm/drm_crtc.h> 16 #include <drm/drm_crtc_helper.h> 17 #include <drm/drm_modes.h> 18 19 #include <linux/clk-provider.h> 20 #include <linux/ioport.h> 21 #include <linux/of_address.h> 22 #include <linux/of_graph.h> 23 #include <linux/of_irq.h> 24 #include <linux/regmap.h> 25 26 #include <video/videomode.h> 27 28 #include "sun4i_crtc.h" 29 #include "sun4i_drv.h" 30 #include "sunxi_engine.h" 31 #include "sun4i_tcon.h" 32 33 static void sun4i_crtc_atomic_begin(struct drm_crtc *crtc, 34 struct drm_crtc_state *old_state) 35 { 36 struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc); 37 struct drm_device *dev = crtc->dev; 38 unsigned long flags; 39 40 if (crtc->state->event) { 41 WARN_ON(drm_crtc_vblank_get(crtc) != 0); 42 43 spin_lock_irqsave(&dev->event_lock, flags); 44 scrtc->event = crtc->state->event; 45 spin_unlock_irqrestore(&dev->event_lock, flags); 46 crtc->state->event = NULL; 47 } 48 } 49 50 static void sun4i_crtc_atomic_flush(struct drm_crtc *crtc, 51 struct drm_crtc_state *old_state) 52 { 53 struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc); 54 struct drm_pending_vblank_event *event = crtc->state->event; 55 56 DRM_DEBUG_DRIVER("Committing plane changes\n"); 57 58 sunxi_engine_commit(scrtc->engine); 59 60 if (event) { 61 crtc->state->event = NULL; 62 63 spin_lock_irq(&crtc->dev->event_lock); 64 if (drm_crtc_vblank_get(crtc) == 0) 65 drm_crtc_arm_vblank_event(crtc, event); 66 else 67 drm_crtc_send_vblank_event(crtc, event); 68 spin_unlock_irq(&crtc->dev->event_lock); 69 } 70 } 71 72 static void sun4i_crtc_disable(struct drm_crtc *crtc) 73 { 74 struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc); 75 76 DRM_DEBUG_DRIVER("Disabling the CRTC\n"); 77 78 sun4i_tcon_disable(scrtc->tcon); 79 80 if (crtc->state->event && !crtc->state->active) { 81 spin_lock_irq(&crtc->dev->event_lock); 82 drm_crtc_send_vblank_event(crtc, crtc->state->event); 83 spin_unlock_irq(&crtc->dev->event_lock); 84 85 crtc->state->event = NULL; 86 } 87 } 88 89 static void sun4i_crtc_enable(struct drm_crtc *crtc) 90 { 91 struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc); 92 93 DRM_DEBUG_DRIVER("Enabling the CRTC\n"); 94 95 sun4i_tcon_enable(scrtc->tcon); 96 } 97 98 static const struct drm_crtc_helper_funcs sun4i_crtc_helper_funcs = { 99 .atomic_begin = sun4i_crtc_atomic_begin, 100 .atomic_flush = sun4i_crtc_atomic_flush, 101 .disable = sun4i_crtc_disable, 102 .enable = sun4i_crtc_enable, 103 }; 104 105 static int sun4i_crtc_enable_vblank(struct drm_crtc *crtc) 106 { 107 struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc); 108 109 DRM_DEBUG_DRIVER("Enabling VBLANK on crtc %p\n", crtc); 110 111 sun4i_tcon_enable_vblank(scrtc->tcon, true); 112 113 return 0; 114 } 115 116 static void sun4i_crtc_disable_vblank(struct drm_crtc *crtc) 117 { 118 struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc); 119 120 DRM_DEBUG_DRIVER("Disabling VBLANK on crtc %p\n", crtc); 121 122 sun4i_tcon_enable_vblank(scrtc->tcon, false); 123 } 124 125 static const struct drm_crtc_funcs sun4i_crtc_funcs = { 126 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 127 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 128 .destroy = drm_crtc_cleanup, 129 .page_flip = drm_atomic_helper_page_flip, 130 .reset = drm_atomic_helper_crtc_reset, 131 .set_config = drm_atomic_helper_set_config, 132 .enable_vblank = sun4i_crtc_enable_vblank, 133 .disable_vblank = sun4i_crtc_disable_vblank, 134 }; 135 136 struct sun4i_crtc *sun4i_crtc_init(struct drm_device *drm, 137 struct sunxi_engine *engine, 138 struct sun4i_tcon *tcon) 139 { 140 struct sun4i_crtc *scrtc; 141 struct drm_plane **planes; 142 struct drm_plane *primary = NULL, *cursor = NULL; 143 int ret, i; 144 145 scrtc = devm_kzalloc(drm->dev, sizeof(*scrtc), GFP_KERNEL); 146 if (!scrtc) 147 return ERR_PTR(-ENOMEM); 148 scrtc->engine = engine; 149 scrtc->tcon = tcon; 150 151 /* Create our layers */ 152 planes = sunxi_engine_layers_init(drm, engine); 153 if (IS_ERR(planes)) { 154 dev_err(drm->dev, "Couldn't create the planes\n"); 155 return NULL; 156 } 157 158 /* find primary and cursor planes for drm_crtc_init_with_planes */ 159 for (i = 0; planes[i]; i++) { 160 struct drm_plane *plane = planes[i]; 161 162 switch (plane->type) { 163 case DRM_PLANE_TYPE_PRIMARY: 164 primary = plane; 165 break; 166 case DRM_PLANE_TYPE_CURSOR: 167 cursor = plane; 168 break; 169 default: 170 break; 171 } 172 } 173 174 ret = drm_crtc_init_with_planes(drm, &scrtc->crtc, 175 primary, 176 cursor, 177 &sun4i_crtc_funcs, 178 NULL); 179 if (ret) { 180 dev_err(drm->dev, "Couldn't init DRM CRTC\n"); 181 return ERR_PTR(ret); 182 } 183 184 drm_crtc_helper_add(&scrtc->crtc, &sun4i_crtc_helper_funcs); 185 186 /* Set crtc.port to output port node of the tcon */ 187 scrtc->crtc.port = of_graph_get_port_by_id(scrtc->tcon->dev->of_node, 188 1); 189 190 /* Set possible_crtcs to this crtc for overlay planes */ 191 for (i = 0; planes[i]; i++) { 192 uint32_t possible_crtcs = BIT(drm_crtc_index(&scrtc->crtc)); 193 struct drm_plane *plane = planes[i]; 194 195 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 196 plane->possible_crtcs = possible_crtcs; 197 } 198 199 return scrtc; 200 } 201