1 /* 2 * Copyright © 2006-2007 Intel Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 21 * DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: 24 * Eric Anholt <eric@anholt.net> 25 */ 26 27 #include <linux/delay.h> 28 #include <linux/i2c.h> 29 #include <linux/pm_runtime.h> 30 31 #include <drm/drm_simple_kms_helper.h> 32 33 #include "cdv_device.h" 34 #include "intel_bios.h" 35 #include "power.h" 36 #include "psb_drv.h" 37 #include "psb_intel_drv.h" 38 #include "psb_intel_reg.h" 39 40 41 static void cdv_intel_crt_dpms(struct drm_encoder *encoder, int mode) 42 { 43 struct drm_device *dev = encoder->dev; 44 u32 temp, reg; 45 reg = ADPA; 46 47 temp = REG_READ(reg); 48 temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE); 49 temp &= ~ADPA_DAC_ENABLE; 50 51 switch (mode) { 52 case DRM_MODE_DPMS_ON: 53 temp |= ADPA_DAC_ENABLE; 54 break; 55 case DRM_MODE_DPMS_STANDBY: 56 temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE; 57 break; 58 case DRM_MODE_DPMS_SUSPEND: 59 temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE; 60 break; 61 case DRM_MODE_DPMS_OFF: 62 temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE; 63 break; 64 } 65 66 REG_WRITE(reg, temp); 67 } 68 69 static enum drm_mode_status cdv_intel_crt_mode_valid(struct drm_connector *connector, 70 struct drm_display_mode *mode) 71 { 72 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 73 return MODE_NO_DBLESCAN; 74 75 /* The lowest clock for CDV is 20000KHz */ 76 if (mode->clock < 20000) 77 return MODE_CLOCK_LOW; 78 79 /* The max clock for CDV is 355 instead of 400 */ 80 if (mode->clock > 355000) 81 return MODE_CLOCK_HIGH; 82 83 return MODE_OK; 84 } 85 86 static void cdv_intel_crt_mode_set(struct drm_encoder *encoder, 87 struct drm_display_mode *mode, 88 struct drm_display_mode *adjusted_mode) 89 { 90 91 struct drm_device *dev = encoder->dev; 92 struct drm_crtc *crtc = encoder->crtc; 93 struct gma_crtc *gma_crtc = to_gma_crtc(crtc); 94 int dpll_md_reg; 95 u32 adpa, dpll_md; 96 u32 adpa_reg; 97 98 if (gma_crtc->pipe == 0) 99 dpll_md_reg = DPLL_A_MD; 100 else 101 dpll_md_reg = DPLL_B_MD; 102 103 adpa_reg = ADPA; 104 105 /* 106 * Disable separate mode multiplier used when cloning SDVO to CRT 107 * XXX this needs to be adjusted when we really are cloning 108 */ 109 { 110 dpll_md = REG_READ(dpll_md_reg); 111 REG_WRITE(dpll_md_reg, 112 dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK); 113 } 114 115 adpa = 0; 116 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) 117 adpa |= ADPA_HSYNC_ACTIVE_HIGH; 118 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) 119 adpa |= ADPA_VSYNC_ACTIVE_HIGH; 120 121 if (gma_crtc->pipe == 0) 122 adpa |= ADPA_PIPE_A_SELECT; 123 else 124 adpa |= ADPA_PIPE_B_SELECT; 125 126 REG_WRITE(adpa_reg, adpa); 127 } 128 129 130 /* 131 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence. 132 * 133 * \return true if CRT is connected. 134 * \return false if CRT is disconnected. 135 */ 136 static bool cdv_intel_crt_detect_hotplug(struct drm_connector *connector, 137 bool force) 138 { 139 struct drm_device *dev = connector->dev; 140 u32 hotplug_en; 141 int i, tries = 0, ret = false; 142 u32 orig; 143 144 /* 145 * On a CDV thep, CRT detect sequence need to be done twice 146 * to get a reliable result. 147 */ 148 tries = 2; 149 150 orig = hotplug_en = REG_READ(PORT_HOTPLUG_EN); 151 hotplug_en &= ~(CRT_HOTPLUG_DETECT_MASK); 152 hotplug_en |= CRT_HOTPLUG_FORCE_DETECT; 153 154 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64; 155 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50; 156 157 for (i = 0; i < tries ; i++) { 158 unsigned long timeout; 159 /* turn on the FORCE_DETECT */ 160 REG_WRITE(PORT_HOTPLUG_EN, hotplug_en); 161 timeout = jiffies + msecs_to_jiffies(1000); 162 /* wait for FORCE_DETECT to go off */ 163 do { 164 if (!(REG_READ(PORT_HOTPLUG_EN) & 165 CRT_HOTPLUG_FORCE_DETECT)) 166 break; 167 msleep(1); 168 } while (time_after(timeout, jiffies)); 169 } 170 171 if ((REG_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) != 172 CRT_HOTPLUG_MONITOR_NONE) 173 ret = true; 174 175 /* clear the interrupt we just generated, if any */ 176 REG_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS); 177 178 /* and put the bits back */ 179 REG_WRITE(PORT_HOTPLUG_EN, orig); 180 return ret; 181 } 182 183 static enum drm_connector_status cdv_intel_crt_detect( 184 struct drm_connector *connector, bool force) 185 { 186 if (cdv_intel_crt_detect_hotplug(connector, force)) 187 return connector_status_connected; 188 else 189 return connector_status_disconnected; 190 } 191 192 static void cdv_intel_crt_destroy(struct drm_connector *connector) 193 { 194 struct gma_connector *gma_connector = to_gma_connector(connector); 195 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 196 197 psb_intel_i2c_destroy(gma_encoder->ddc_bus); 198 drm_connector_cleanup(connector); 199 kfree(gma_connector); 200 } 201 202 static int cdv_intel_crt_get_modes(struct drm_connector *connector) 203 { 204 struct gma_encoder *gma_encoder = gma_attached_encoder(connector); 205 return psb_intel_ddc_get_modes(connector, 206 &gma_encoder->ddc_bus->adapter); 207 } 208 209 static int cdv_intel_crt_set_property(struct drm_connector *connector, 210 struct drm_property *property, 211 uint64_t value) 212 { 213 return 0; 214 } 215 216 /* 217 * Routines for controlling stuff on the analog port 218 */ 219 220 static const struct drm_encoder_helper_funcs cdv_intel_crt_helper_funcs = { 221 .dpms = cdv_intel_crt_dpms, 222 .prepare = gma_encoder_prepare, 223 .commit = gma_encoder_commit, 224 .mode_set = cdv_intel_crt_mode_set, 225 }; 226 227 static const struct drm_connector_funcs cdv_intel_crt_connector_funcs = { 228 .dpms = drm_helper_connector_dpms, 229 .detect = cdv_intel_crt_detect, 230 .fill_modes = drm_helper_probe_single_connector_modes, 231 .destroy = cdv_intel_crt_destroy, 232 .set_property = cdv_intel_crt_set_property, 233 }; 234 235 static const struct drm_connector_helper_funcs 236 cdv_intel_crt_connector_helper_funcs = { 237 .mode_valid = cdv_intel_crt_mode_valid, 238 .get_modes = cdv_intel_crt_get_modes, 239 .best_encoder = gma_best_encoder, 240 }; 241 242 void cdv_intel_crt_init(struct drm_device *dev, 243 struct psb_intel_mode_device *mode_dev) 244 { 245 246 struct gma_connector *gma_connector; 247 struct gma_encoder *gma_encoder; 248 struct drm_connector *connector; 249 struct drm_encoder *encoder; 250 251 gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL); 252 if (!gma_encoder) 253 return; 254 255 gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL); 256 if (!gma_connector) 257 goto failed_connector; 258 259 connector = &gma_connector->base; 260 connector->polled = DRM_CONNECTOR_POLL_HPD; 261 drm_connector_init(dev, connector, 262 &cdv_intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA); 263 264 encoder = &gma_encoder->base; 265 drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_DAC); 266 267 gma_connector_attach_encoder(gma_connector, gma_encoder); 268 269 /* Set up the DDC bus. */ 270 gma_encoder->ddc_bus = psb_intel_i2c_create(dev, GPIOA, "CRTDDC_A"); 271 if (!gma_encoder->ddc_bus) { 272 dev_printk(KERN_ERR, dev->dev, "DDC bus registration failed.\n"); 273 goto failed_ddc; 274 } 275 276 gma_encoder->type = INTEL_OUTPUT_ANALOG; 277 connector->interlace_allowed = 0; 278 connector->doublescan_allowed = 0; 279 280 drm_encoder_helper_add(encoder, &cdv_intel_crt_helper_funcs); 281 drm_connector_helper_add(connector, 282 &cdv_intel_crt_connector_helper_funcs); 283 284 return; 285 failed_ddc: 286 drm_encoder_cleanup(&gma_encoder->base); 287 drm_connector_cleanup(&gma_connector->base); 288 kfree(gma_connector); 289 failed_connector: 290 kfree(gma_encoder); 291 return; 292 } 293