/* * Copyright © 2006-2007 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * Authors: * Eric Anholt <eric@anholt.net> */ #include <linux/dmi.h> #include <linux/i2c.h> #include <linux/slab.h> #include "drmP.h" #include "drm.h" #include "drm_crtc.h" #include "drm_crtc_helper.h" #include "drm_edid.h" #include "intel_drv.h" #include "i915_drm.h" #include "i915_drv.h" /* Here's the desired hotplug mode */ #define ADPA_HOTPLUG_BITS (ADPA_CRT_HOTPLUG_PERIOD_128 | \ ADPA_CRT_HOTPLUG_WARMUP_10MS | \ ADPA_CRT_HOTPLUG_SAMPLE_4S | \ ADPA_CRT_HOTPLUG_VOLTAGE_50 | \ ADPA_CRT_HOTPLUG_VOLREF_325MV | \ ADPA_CRT_HOTPLUG_ENABLE) struct intel_crt { struct intel_encoder base; bool force_hotplug_required; }; static struct intel_crt *intel_attached_crt(struct drm_connector *connector) { return container_of(intel_attached_encoder(connector), struct intel_crt, base); } static void intel_crt_dpms(struct drm_encoder *encoder, int mode) { struct drm_device *dev = encoder->dev; struct drm_i915_private *dev_priv = dev->dev_private; u32 temp, reg; if (HAS_PCH_SPLIT(dev)) reg = PCH_ADPA; else reg = ADPA; temp = I915_READ(reg); temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE); temp &= ~ADPA_DAC_ENABLE; switch (mode) { case DRM_MODE_DPMS_ON: temp |= ADPA_DAC_ENABLE; break; case DRM_MODE_DPMS_STANDBY: temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE; break; case DRM_MODE_DPMS_SUSPEND: temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE; break; case DRM_MODE_DPMS_OFF: temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE; break; } I915_WRITE(reg, temp); } static int intel_crt_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) { struct drm_device *dev = connector->dev; int max_clock = 0; if (mode->flags & DRM_MODE_FLAG_DBLSCAN) return MODE_NO_DBLESCAN; if (mode->clock < 25000) return MODE_CLOCK_LOW; if (IS_GEN2(dev)) max_clock = 350000; else max_clock = 400000; if (mode->clock > max_clock) return MODE_CLOCK_HIGH; return MODE_OK; } static bool intel_crt_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) { return true; } static void intel_crt_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) { struct drm_device *dev = encoder->dev; struct drm_crtc *crtc = encoder->crtc; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); struct drm_i915_private *dev_priv = dev->dev_private; int dpll_md_reg; u32 adpa, dpll_md; u32 adpa_reg; dpll_md_reg = DPLL_MD(intel_crtc->pipe); if (HAS_PCH_SPLIT(dev)) adpa_reg = PCH_ADPA; else adpa_reg = ADPA; /* * Disable separate mode multiplier used when cloning SDVO to CRT * XXX this needs to be adjusted when we really are cloning */ if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) { dpll_md = I915_READ(dpll_md_reg); I915_WRITE(dpll_md_reg, dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK); } adpa = ADPA_HOTPLUG_BITS; if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) adpa |= ADPA_HSYNC_ACTIVE_HIGH; if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) adpa |= ADPA_VSYNC_ACTIVE_HIGH; /* For CPT allow 3 pipe config, for others just use A or B */ if (HAS_PCH_CPT(dev)) adpa |= PORT_TRANS_SEL_CPT(intel_crtc->pipe); else if (intel_crtc->pipe == 0) adpa |= ADPA_PIPE_A_SELECT; else adpa |= ADPA_PIPE_B_SELECT; if (!HAS_PCH_SPLIT(dev)) I915_WRITE(BCLRPAT(intel_crtc->pipe), 0); I915_WRITE(adpa_reg, adpa); } static bool intel_ironlake_crt_detect_hotplug(struct drm_connector *connector) { struct drm_device *dev = connector->dev; struct intel_crt *crt = intel_attached_crt(connector); struct drm_i915_private *dev_priv = dev->dev_private; u32 adpa; bool ret; /* The first time through, trigger an explicit detection cycle */ if (crt->force_hotplug_required) { bool turn_off_dac = HAS_PCH_SPLIT(dev); u32 save_adpa; crt->force_hotplug_required = 0; save_adpa = adpa = I915_READ(PCH_ADPA); DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa); adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER; if (turn_off_dac) adpa &= ~ADPA_DAC_ENABLE; I915_WRITE(PCH_ADPA, adpa); if (wait_for((I915_READ(PCH_ADPA) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) == 0, 1000)) DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER"); if (turn_off_dac) { I915_WRITE(PCH_ADPA, save_adpa); POSTING_READ(PCH_ADPA); } } /* Check the status to see if both blue and green are on now */ adpa = I915_READ(PCH_ADPA); if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0) ret = true; else ret = false; DRM_DEBUG_KMS("ironlake hotplug adpa=0x%x, result %d\n", adpa, ret); return ret; } /** * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence. * * Not for i915G/i915GM * * \return true if CRT is connected. * \return false if CRT is disconnected. */ static bool intel_crt_detect_hotplug(struct drm_connector *connector) { struct drm_device *dev = connector->dev; struct drm_i915_private *dev_priv = dev->dev_private; u32 hotplug_en, orig, stat; bool ret = false; int i, tries = 0; if (HAS_PCH_SPLIT(dev)) return intel_ironlake_crt_detect_hotplug(connector); /* * On 4 series desktop, CRT detect sequence need to be done twice * to get a reliable result. */ if (IS_G4X(dev) && !IS_GM45(dev)) tries = 2; else tries = 1; hotplug_en = orig = I915_READ(PORT_HOTPLUG_EN); hotplug_en |= CRT_HOTPLUG_FORCE_DETECT; for (i = 0; i < tries ; i++) { /* turn on the FORCE_DETECT */ I915_WRITE(PORT_HOTPLUG_EN, hotplug_en); /* wait for FORCE_DETECT to go off */ if (wait_for((I915_READ(PORT_HOTPLUG_EN) & CRT_HOTPLUG_FORCE_DETECT) == 0, 1000)) DRM_DEBUG_KMS("timed out waiting for FORCE_DETECT to go off"); } stat = I915_READ(PORT_HOTPLUG_STAT); if ((stat & CRT_HOTPLUG_MONITOR_MASK) != CRT_HOTPLUG_MONITOR_NONE) ret = true; /* clear the interrupt we just generated, if any */ I915_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS); /* and put the bits back */ I915_WRITE(PORT_HOTPLUG_EN, orig); return ret; } static bool intel_crt_detect_ddc(struct drm_connector *connector) { struct intel_crt *crt = intel_attached_crt(connector); struct drm_i915_private *dev_priv = crt->base.base.dev->dev_private; /* CRT should always be at 0, but check anyway */ if (crt->base.type != INTEL_OUTPUT_ANALOG) return false; if (intel_ddc_probe(&crt->base, dev_priv->crt_ddc_pin)) { struct edid *edid; bool is_digital = false; edid = drm_get_edid(connector, &dev_priv->gmbus[dev_priv->crt_ddc_pin].adapter); /* * This may be a DVI-I connector with a shared DDC * link between analog and digital outputs, so we * have to check the EDID input spec of the attached device. * * On the other hand, what should we do if it is a broken EDID? */ if (edid != NULL) { is_digital = edid->input & DRM_EDID_INPUT_DIGITAL; connector->display_info.raw_edid = NULL; kfree(edid); } if (!is_digital) { DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n"); return true; } else { DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [EDID reports a digital panel]\n"); } } return false; } static enum drm_connector_status intel_crt_load_detect(struct intel_crt *crt) { struct drm_device *dev = crt->base.base.dev; struct drm_i915_private *dev_priv = dev->dev_private; uint32_t pipe = to_intel_crtc(crt->base.base.crtc)->pipe; uint32_t save_bclrpat; uint32_t save_vtotal; uint32_t vtotal, vactive; uint32_t vsample; uint32_t vblank, vblank_start, vblank_end; uint32_t dsl; uint32_t bclrpat_reg; uint32_t vtotal_reg; uint32_t vblank_reg; uint32_t vsync_reg; uint32_t pipeconf_reg; uint32_t pipe_dsl_reg; uint8_t st00; enum drm_connector_status status; DRM_DEBUG_KMS("starting load-detect on CRT\n"); bclrpat_reg = BCLRPAT(pipe); vtotal_reg = VTOTAL(pipe); vblank_reg = VBLANK(pipe); vsync_reg = VSYNC(pipe); pipeconf_reg = PIPECONF(pipe); pipe_dsl_reg = PIPEDSL(pipe); save_bclrpat = I915_READ(bclrpat_reg); save_vtotal = I915_READ(vtotal_reg); vblank = I915_READ(vblank_reg); vtotal = ((save_vtotal >> 16) & 0xfff) + 1; vactive = (save_vtotal & 0x7ff) + 1; vblank_start = (vblank & 0xfff) + 1; vblank_end = ((vblank >> 16) & 0xfff) + 1; /* Set the border color to purple. */ I915_WRITE(bclrpat_reg, 0x500050); if (!IS_GEN2(dev)) { uint32_t pipeconf = I915_READ(pipeconf_reg); I915_WRITE(pipeconf_reg, pipeconf | PIPECONF_FORCE_BORDER); POSTING_READ(pipeconf_reg); /* Wait for next Vblank to substitue * border color for Color info */ intel_wait_for_vblank(dev, pipe); st00 = I915_READ8(VGA_MSR_WRITE); status = ((st00 & (1 << 4)) != 0) ? connector_status_connected : connector_status_disconnected; I915_WRITE(pipeconf_reg, pipeconf); } else { bool restore_vblank = false; int count, detect; /* * If there isn't any border, add some. * Yes, this will flicker */ if (vblank_start <= vactive && vblank_end >= vtotal) { uint32_t vsync = I915_READ(vsync_reg); uint32_t vsync_start = (vsync & 0xffff) + 1; vblank_start = vsync_start; I915_WRITE(vblank_reg, (vblank_start - 1) | ((vblank_end - 1) << 16)); restore_vblank = true; } /* sample in the vertical border, selecting the larger one */ if (vblank_start - vactive >= vtotal - vblank_end) vsample = (vblank_start + vactive) >> 1; else vsample = (vtotal + vblank_end) >> 1; /* * Wait for the border to be displayed */ while (I915_READ(pipe_dsl_reg) >= vactive) ; while ((dsl = I915_READ(pipe_dsl_reg)) <= vsample) ; /* * Watch ST00 for an entire scanline */ detect = 0; count = 0; do { count++; /* Read the ST00 VGA status register */ st00 = I915_READ8(VGA_MSR_WRITE); if (st00 & (1 << 4)) detect++; } while ((I915_READ(pipe_dsl_reg) == dsl)); /* restore vblank if necessary */ if (restore_vblank) I915_WRITE(vblank_reg, vblank); /* * If more than 3/4 of the scanline detected a monitor, * then it is assumed to be present. This works even on i830, * where there isn't any way to force the border color across * the screen */ status = detect * 4 > count * 3 ? connector_status_connected : connector_status_disconnected; } /* Restore previous settings */ I915_WRITE(bclrpat_reg, save_bclrpat); return status; } static enum drm_connector_status intel_crt_detect(struct drm_connector *connector, bool force) { struct drm_device *dev = connector->dev; struct intel_crt *crt = intel_attached_crt(connector); struct drm_crtc *crtc; enum drm_connector_status status; if (I915_HAS_HOTPLUG(dev)) { if (intel_crt_detect_hotplug(connector)) { DRM_DEBUG_KMS("CRT detected via hotplug\n"); return connector_status_connected; } else { DRM_DEBUG_KMS("CRT not detected via hotplug\n"); return connector_status_disconnected; } } if (intel_crt_detect_ddc(connector)) return connector_status_connected; if (!force) return connector->status; /* for pre-945g platforms use load detect */ crtc = crt->base.base.crtc; if (crtc && crtc->enabled) { status = intel_crt_load_detect(crt); } else { struct intel_load_detect_pipe tmp; if (intel_get_load_detect_pipe(&crt->base, connector, NULL, &tmp)) { if (intel_crt_detect_ddc(connector)) status = connector_status_connected; else status = intel_crt_load_detect(crt); intel_release_load_detect_pipe(&crt->base, connector, &tmp); } else status = connector_status_unknown; } return status; } static void intel_crt_destroy(struct drm_connector *connector) { drm_sysfs_connector_remove(connector); drm_connector_cleanup(connector); kfree(connector); } static int intel_crt_get_modes(struct drm_connector *connector) { struct drm_device *dev = connector->dev; struct drm_i915_private *dev_priv = dev->dev_private; int ret; ret = intel_ddc_get_modes(connector, &dev_priv->gmbus[dev_priv->crt_ddc_pin].adapter); if (ret || !IS_G4X(dev)) return ret; /* Try to probe digital port for output in DVI-I -> VGA mode. */ return intel_ddc_get_modes(connector, &dev_priv->gmbus[GMBUS_PORT_DPB].adapter); } static int intel_crt_set_property(struct drm_connector *connector, struct drm_property *property, uint64_t value) { return 0; } static void intel_crt_reset(struct drm_connector *connector) { struct drm_device *dev = connector->dev; struct intel_crt *crt = intel_attached_crt(connector); if (HAS_PCH_SPLIT(dev)) crt->force_hotplug_required = 1; } /* * Routines for controlling stuff on the analog port */ static const struct drm_encoder_helper_funcs intel_crt_helper_funcs = { .dpms = intel_crt_dpms, .mode_fixup = intel_crt_mode_fixup, .prepare = intel_encoder_prepare, .commit = intel_encoder_commit, .mode_set = intel_crt_mode_set, }; static const struct drm_connector_funcs intel_crt_connector_funcs = { .reset = intel_crt_reset, .dpms = drm_helper_connector_dpms, .detect = intel_crt_detect, .fill_modes = drm_helper_probe_single_connector_modes, .destroy = intel_crt_destroy, .set_property = intel_crt_set_property, }; static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs = { .mode_valid = intel_crt_mode_valid, .get_modes = intel_crt_get_modes, .best_encoder = intel_best_encoder, }; static const struct drm_encoder_funcs intel_crt_enc_funcs = { .destroy = intel_encoder_destroy, }; static int __init intel_no_crt_dmi_callback(const struct dmi_system_id *id) { DRM_DEBUG_KMS("Skipping CRT initialization for %s\n", id->ident); return 1; } static const struct dmi_system_id intel_no_crt[] = { { .callback = intel_no_crt_dmi_callback, .ident = "ACER ZGB", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "ACER"), DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"), }, }, { } }; void intel_crt_init(struct drm_device *dev) { struct drm_connector *connector; struct intel_crt *crt; struct intel_connector *intel_connector; struct drm_i915_private *dev_priv = dev->dev_private; /* Skip machines without VGA that falsely report hotplug events */ if (dmi_check_system(intel_no_crt)) return; crt = kzalloc(sizeof(struct intel_crt), GFP_KERNEL); if (!crt) return; intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL); if (!intel_connector) { kfree(crt); return; } connector = &intel_connector->base; drm_connector_init(dev, &intel_connector->base, &intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA); drm_encoder_init(dev, &crt->base.base, &intel_crt_enc_funcs, DRM_MODE_ENCODER_DAC); intel_connector_attach_encoder(intel_connector, &crt->base); crt->base.type = INTEL_OUTPUT_ANALOG; crt->base.clone_mask = (1 << INTEL_SDVO_NON_TV_CLONE_BIT | 1 << INTEL_ANALOG_CLONE_BIT | 1 << INTEL_SDVO_LVDS_CLONE_BIT); crt->base.crtc_mask = (1 << 0) | (1 << 1); connector->interlace_allowed = 1; connector->doublescan_allowed = 0; drm_encoder_helper_add(&crt->base.base, &intel_crt_helper_funcs); drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs); drm_sysfs_connector_add(connector); if (I915_HAS_HOTPLUG(dev)) connector->polled = DRM_CONNECTOR_POLL_HPD; else connector->polled = DRM_CONNECTOR_POLL_CONNECT; /* * Configure the automatic hotplug detection stuff */ crt->force_hotplug_required = 0; if (HAS_PCH_SPLIT(dev)) { u32 adpa; adpa = I915_READ(PCH_ADPA); adpa &= ~ADPA_CRT_HOTPLUG_MASK; adpa |= ADPA_HOTPLUG_BITS; I915_WRITE(PCH_ADPA, adpa); POSTING_READ(PCH_ADPA); DRM_DEBUG_KMS("pch crt adpa set to 0x%x\n", adpa); crt->force_hotplug_required = 1; } dev_priv->hotplug_supported_mask |= CRT_HOTPLUG_INT_STATUS; }