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_crtc_helper.h> 32#include <drm/drm_modeset_helper_vtables.h> 33#include <drm/drm_simple_kms_helper.h> 34 35#include "cdv_device.h" 36#include "intel_bios.h" 37#include "power.h" 38#include "psb_drv.h" 39#include "psb_intel_drv.h" 40#include "psb_intel_reg.h" 41 42 43static void cdv_intel_crt_dpms(struct drm_encoder *encoder, int mode) 44{ 45 struct drm_device *dev = encoder->dev; 46 u32 temp, reg; 47 reg = ADPA; 48 49 temp = REG_READ(reg); 50 temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE); 51 temp &= ~ADPA_DAC_ENABLE; 52 53 switch (mode) { 54 case DRM_MODE_DPMS_ON: 55 temp |= ADPA_DAC_ENABLE; 56 break; 57 case DRM_MODE_DPMS_STANDBY: 58 temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE; 59 break; 60 case DRM_MODE_DPMS_SUSPEND: 61 temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE; 62 break; 63 case DRM_MODE_DPMS_OFF: 64 temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE; 65 break; 66 } 67 68 REG_WRITE(reg, temp); 69} 70 71static enum drm_mode_status cdv_intel_crt_mode_valid(struct drm_connector *connector, 72 struct drm_display_mode *mode) 73{ 74 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 75 return MODE_NO_DBLESCAN; 76 77 /* The lowest clock for CDV is 20000KHz */ 78 if (mode->clock < 20000) 79 return MODE_CLOCK_LOW; 80 81 /* The max clock for CDV is 355 instead of 400 */ 82 if (mode->clock > 355000) 83 return MODE_CLOCK_HIGH; 84 85 return MODE_OK; 86} 87 88static void cdv_intel_crt_mode_set(struct drm_encoder *encoder, 89 struct drm_display_mode *mode, 90 struct drm_display_mode *adjusted_mode) 91{ 92 93 struct drm_device *dev = encoder->dev; 94 struct drm_crtc *crtc = encoder->crtc; 95 struct gma_crtc *gma_crtc = to_gma_crtc(crtc); 96 int dpll_md_reg; 97 u32 adpa, dpll_md; 98 u32 adpa_reg; 99 100 if (gma_crtc->pipe == 0) 101 dpll_md_reg = DPLL_A_MD; 102 else 103 dpll_md_reg = DPLL_B_MD; 104 105 adpa_reg = ADPA; 106 107 /* 108 * Disable separate mode multiplier used when cloning SDVO to CRT 109 * XXX this needs to be adjusted when we really are cloning 110 */ 111 { 112 dpll_md = REG_READ(dpll_md_reg); 113 REG_WRITE(dpll_md_reg, 114 dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK); 115 } 116 117 adpa = 0; 118 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) 119 adpa |= ADPA_HSYNC_ACTIVE_HIGH; 120 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) 121 adpa |= ADPA_VSYNC_ACTIVE_HIGH; 122 123 if (gma_crtc->pipe == 0) 124 adpa |= ADPA_PIPE_A_SELECT; 125 else 126 adpa |= ADPA_PIPE_B_SELECT; 127 128 REG_WRITE(adpa_reg, adpa); 129} 130 131 132/* 133 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence. 134 * 135 * \return true if CRT is connected. 136 * \return false if CRT is disconnected. 137 */ 138static bool cdv_intel_crt_detect_hotplug(struct drm_connector *connector, 139 bool force) 140{ 141 struct drm_device *dev = connector->dev; 142 u32 hotplug_en; 143 int i, tries = 0, ret = false; 144 u32 orig; 145 146 /* 147 * On a CDV thep, CRT detect sequence need to be done twice 148 * to get a reliable result. 149 */ 150 tries = 2; 151 152 orig = hotplug_en = REG_READ(PORT_HOTPLUG_EN); 153 hotplug_en &= ~(CRT_HOTPLUG_DETECT_MASK); 154 hotplug_en |= CRT_HOTPLUG_FORCE_DETECT; 155 156 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64; 157 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50; 158 159 for (i = 0; i < tries ; i++) { 160 unsigned long timeout; 161 /* turn on the FORCE_DETECT */ 162 REG_WRITE(PORT_HOTPLUG_EN, hotplug_en); 163 timeout = jiffies + msecs_to_jiffies(1000); 164 /* wait for FORCE_DETECT to go off */ 165 do { 166 if (!(REG_READ(PORT_HOTPLUG_EN) & 167 CRT_HOTPLUG_FORCE_DETECT)) 168 break; 169 msleep(1); 170 } while (time_after(timeout, jiffies)); 171 } 172 173 if ((REG_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) != 174 CRT_HOTPLUG_MONITOR_NONE) 175 ret = true; 176 177 /* clear the interrupt we just generated, if any */ 178 REG_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS); 179 180 /* and put the bits back */ 181 REG_WRITE(PORT_HOTPLUG_EN, orig); 182 return ret; 183} 184 185static enum drm_connector_status cdv_intel_crt_detect( 186 struct drm_connector *connector, bool force) 187{ 188 if (cdv_intel_crt_detect_hotplug(connector, force)) 189 return connector_status_connected; 190 else 191 return connector_status_disconnected; 192} 193 194static void cdv_intel_crt_destroy(struct drm_connector *connector) 195{ 196 struct gma_connector *gma_connector = to_gma_connector(connector); 197 struct gma_i2c_chan *ddc_bus = to_gma_i2c_chan(connector->ddc); 198 199 gma_i2c_destroy(ddc_bus); 200 drm_connector_cleanup(connector); 201 kfree(gma_connector); 202} 203 204static int cdv_intel_crt_get_modes(struct drm_connector *connector) 205{ 206 return psb_intel_ddc_get_modes(connector, connector->ddc); 207} 208 209static 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 220static 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 227static 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 235static 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 242void 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 gma_i2c_chan *ddc_bus; 249 struct drm_connector *connector; 250 struct drm_encoder *encoder; 251 int ret; 252 253 gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL); 254 if (!gma_encoder) 255 return; 256 257 gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL); 258 if (!gma_connector) 259 goto err_free_encoder; 260 261 /* Set up the DDC bus. */ 262 ddc_bus = gma_i2c_create(dev, GPIOA, "CRTDDC_A"); 263 if (!ddc_bus) { 264 dev_printk(KERN_ERR, dev->dev, "DDC bus registration failed.\n"); 265 goto err_free_connector; 266 } 267 268 connector = &gma_connector->base; 269 connector->polled = DRM_CONNECTOR_POLL_HPD; 270 ret = drm_connector_init_with_ddc(dev, connector, 271 &cdv_intel_crt_connector_funcs, 272 DRM_MODE_CONNECTOR_VGA, 273 &ddc_bus->base); 274 if (ret) 275 goto err_ddc_destroy; 276 277 encoder = &gma_encoder->base; 278 ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_DAC); 279 if (ret) 280 goto err_connector_cleanup; 281 282 gma_connector_attach_encoder(gma_connector, gma_encoder); 283 284 gma_encoder->type = INTEL_OUTPUT_ANALOG; 285 connector->interlace_allowed = 0; 286 connector->doublescan_allowed = 0; 287 288 drm_encoder_helper_add(encoder, &cdv_intel_crt_helper_funcs); 289 drm_connector_helper_add(connector, 290 &cdv_intel_crt_connector_helper_funcs); 291 292 return; 293 294err_connector_cleanup: 295 drm_connector_cleanup(&gma_connector->base); 296err_ddc_destroy: 297 gma_i2c_destroy(ddc_bus); 298err_free_connector: 299 kfree(gma_connector); 300err_free_encoder: 301 kfree(gma_encoder); 302 return; 303} 304