| /* |
| * 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 <drm/drmP.h> |
| #include <drm/drm_crtc.h> |
| #include <drm/drm_crtc_helper.h> |
| #include <drm/drm_edid.h> |
| #include "intel_drv.h" |
| #include <drm/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; |
| /* DPMS state is stored in the connector, which we need in the |
| * encoder's enable/disable callbacks */ |
| struct intel_connector *connector; |
| bool force_hotplug_required; |
| u32 adpa_reg; |
| }; |
| |
| static struct intel_crt *intel_encoder_to_crt(struct intel_encoder *encoder) |
| { |
| return container_of(encoder, struct intel_crt, base); |
| } |
| |
| static struct intel_crt *intel_attached_crt(struct drm_connector *connector) |
| { |
| return intel_encoder_to_crt(intel_attached_encoder(connector)); |
| } |
| |
| static bool intel_crt_get_hw_state(struct intel_encoder *encoder, |
| enum pipe *pipe) |
| { |
| struct drm_device *dev = encoder->base.dev; |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct intel_crt *crt = intel_encoder_to_crt(encoder); |
| enum intel_display_power_domain power_domain; |
| u32 tmp; |
| |
| power_domain = intel_display_port_power_domain(encoder); |
| if (!intel_display_power_enabled(dev_priv, power_domain)) |
| return false; |
| |
| tmp = I915_READ(crt->adpa_reg); |
| |
| if (!(tmp & ADPA_DAC_ENABLE)) |
| return false; |
| |
| if (HAS_PCH_CPT(dev)) |
| *pipe = PORT_TO_PIPE_CPT(tmp); |
| else |
| *pipe = PORT_TO_PIPE(tmp); |
| |
| return true; |
| } |
| |
| static unsigned int intel_crt_get_flags(struct intel_encoder *encoder) |
| { |
| struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; |
| struct intel_crt *crt = intel_encoder_to_crt(encoder); |
| u32 tmp, flags = 0; |
| |
| tmp = I915_READ(crt->adpa_reg); |
| |
| if (tmp & ADPA_HSYNC_ACTIVE_HIGH) |
| flags |= DRM_MODE_FLAG_PHSYNC; |
| else |
| flags |= DRM_MODE_FLAG_NHSYNC; |
| |
| if (tmp & ADPA_VSYNC_ACTIVE_HIGH) |
| flags |= DRM_MODE_FLAG_PVSYNC; |
| else |
| flags |= DRM_MODE_FLAG_NVSYNC; |
| |
| return flags; |
| } |
| |
| static void intel_crt_get_config(struct intel_encoder *encoder, |
| struct intel_crtc_config *pipe_config) |
| { |
| struct drm_device *dev = encoder->base.dev; |
| int dotclock; |
| |
| pipe_config->adjusted_mode.flags |= intel_crt_get_flags(encoder); |
| |
| dotclock = pipe_config->port_clock; |
| |
| if (HAS_PCH_SPLIT(dev)) |
| ironlake_check_encoder_dotclock(pipe_config, dotclock); |
| |
| pipe_config->adjusted_mode.crtc_clock = dotclock; |
| } |
| |
| static void hsw_crt_get_config(struct intel_encoder *encoder, |
| struct intel_crtc_config *pipe_config) |
| { |
| intel_ddi_get_config(encoder, pipe_config); |
| |
| pipe_config->adjusted_mode.flags &= ~(DRM_MODE_FLAG_PHSYNC | |
| DRM_MODE_FLAG_NHSYNC | |
| DRM_MODE_FLAG_PVSYNC | |
| DRM_MODE_FLAG_NVSYNC); |
| pipe_config->adjusted_mode.flags |= intel_crt_get_flags(encoder); |
| } |
| |
| static void hsw_crt_pre_enable(struct intel_encoder *encoder) |
| { |
| struct drm_device *dev = encoder->base.dev; |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| |
| WARN(I915_READ(SPLL_CTL) & SPLL_PLL_ENABLE, "SPLL already enabled\n"); |
| I915_WRITE(SPLL_CTL, |
| SPLL_PLL_ENABLE | SPLL_PLL_FREQ_1350MHz | SPLL_PLL_SSC); |
| POSTING_READ(SPLL_CTL); |
| udelay(20); |
| } |
| |
| /* Note: The caller is required to filter out dpms modes not supported by the |
| * platform. */ |
| static void intel_crt_set_dpms(struct intel_encoder *encoder, int mode) |
| { |
| struct drm_device *dev = encoder->base.dev; |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct intel_crt *crt = intel_encoder_to_crt(encoder); |
| struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc); |
| struct drm_display_mode *adjusted_mode = &crtc->config.adjusted_mode; |
| u32 adpa; |
| |
| if (INTEL_INFO(dev)->gen >= 5) |
| adpa = ADPA_HOTPLUG_BITS; |
| else |
| adpa = 0; |
| |
| 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_LPT(dev)) |
| ; /* Those bits don't exist here */ |
| else if (HAS_PCH_CPT(dev)) |
| adpa |= PORT_TRANS_SEL_CPT(crtc->pipe); |
| else if (crtc->pipe == 0) |
| adpa |= ADPA_PIPE_A_SELECT; |
| else |
| adpa |= ADPA_PIPE_B_SELECT; |
| |
| if (!HAS_PCH_SPLIT(dev)) |
| I915_WRITE(BCLRPAT(crtc->pipe), 0); |
| |
| switch (mode) { |
| case DRM_MODE_DPMS_ON: |
| adpa |= ADPA_DAC_ENABLE; |
| break; |
| case DRM_MODE_DPMS_STANDBY: |
| adpa |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE; |
| break; |
| case DRM_MODE_DPMS_SUSPEND: |
| adpa |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE; |
| break; |
| case DRM_MODE_DPMS_OFF: |
| adpa |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE; |
| break; |
| } |
| |
| I915_WRITE(crt->adpa_reg, adpa); |
| } |
| |
| static void intel_disable_crt(struct intel_encoder *encoder) |
| { |
| intel_crt_set_dpms(encoder, DRM_MODE_DPMS_OFF); |
| } |
| |
| |
| static void hsw_crt_post_disable(struct intel_encoder *encoder) |
| { |
| struct drm_device *dev = encoder->base.dev; |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| uint32_t val; |
| |
| DRM_DEBUG_KMS("Disabling SPLL\n"); |
| val = I915_READ(SPLL_CTL); |
| WARN_ON(!(val & SPLL_PLL_ENABLE)); |
| I915_WRITE(SPLL_CTL, val & ~SPLL_PLL_ENABLE); |
| POSTING_READ(SPLL_CTL); |
| } |
| |
| static void intel_enable_crt(struct intel_encoder *encoder) |
| { |
| struct intel_crt *crt = intel_encoder_to_crt(encoder); |
| |
| intel_crt_set_dpms(encoder, crt->connector->base.dpms); |
| } |
| |
| /* Special dpms function to support cloning between dvo/sdvo/crt. */ |
| static void intel_crt_dpms(struct drm_connector *connector, int mode) |
| { |
| struct drm_device *dev = connector->dev; |
| struct intel_encoder *encoder = intel_attached_encoder(connector); |
| struct drm_crtc *crtc; |
| int old_dpms; |
| |
| /* PCH platforms and VLV only support on/off. */ |
| if (INTEL_INFO(dev)->gen >= 5 && mode != DRM_MODE_DPMS_ON) |
| mode = DRM_MODE_DPMS_OFF; |
| |
| if (mode == connector->dpms) |
| return; |
| |
| old_dpms = connector->dpms; |
| connector->dpms = mode; |
| |
| /* Only need to change hw state when actually enabled */ |
| crtc = encoder->base.crtc; |
| if (!crtc) { |
| encoder->connectors_active = false; |
| return; |
| } |
| |
| /* We need the pipe to run for anything but OFF. */ |
| if (mode == DRM_MODE_DPMS_OFF) |
| encoder->connectors_active = false; |
| else |
| encoder->connectors_active = true; |
| |
| /* We call connector dpms manually below in case pipe dpms doesn't |
| * change due to cloning. */ |
| if (mode < old_dpms) { |
| /* From off to on, enable the pipe first. */ |
| intel_crtc_update_dpms(crtc); |
| |
| intel_crt_set_dpms(encoder, mode); |
| } else { |
| intel_crt_set_dpms(encoder, mode); |
| |
| intel_crtc_update_dpms(crtc); |
| } |
| |
| intel_modeset_check_state(connector->dev); |
| } |
| |
| static enum drm_mode_status |
| 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; |
| |
| /* The FDI receiver on LPT only supports 8bpc and only has 2 lanes. */ |
| if (HAS_PCH_LPT(dev) && |
| (ironlake_get_lanes_required(mode->clock, 270000, 24) > 2)) |
| return MODE_CLOCK_HIGH; |
| |
| return MODE_OK; |
| } |
| |
| static bool intel_crt_compute_config(struct intel_encoder *encoder, |
| struct intel_crtc_config *pipe_config) |
| { |
| struct drm_device *dev = encoder->base.dev; |
| |
| if (HAS_PCH_SPLIT(dev)) |
| pipe_config->has_pch_encoder = true; |
| |
| /* LPT FDI RX only supports 8bpc. */ |
| if (HAS_PCH_LPT(dev)) |
| pipe_config->pipe_bpp = 24; |
| |
| /* FDI must always be 2.7 GHz */ |
| if (HAS_DDI(dev)) |
| pipe_config->port_clock = 135000 * 2; |
| |
| return true; |
| } |
| |
| 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(crt->adpa_reg); |
| 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(crt->adpa_reg, adpa); |
| |
| if (wait_for((I915_READ(crt->adpa_reg) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) == 0, |
| 1000)) |
| DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER"); |
| |
| if (turn_off_dac) { |
| I915_WRITE(crt->adpa_reg, save_adpa); |
| POSTING_READ(crt->adpa_reg); |
| } |
| } |
| |
| /* Check the status to see if both blue and green are on now */ |
| adpa = I915_READ(crt->adpa_reg); |
| 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; |
| } |
| |
| static bool valleyview_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; |
| u32 save_adpa; |
| |
| save_adpa = adpa = I915_READ(crt->adpa_reg); |
| DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa); |
| |
| adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER; |
| |
| I915_WRITE(crt->adpa_reg, adpa); |
| |
| if (wait_for((I915_READ(crt->adpa_reg) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) == 0, |
| 1000)) { |
| DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER"); |
| I915_WRITE(crt->adpa_reg, save_adpa); |
| } |
| |
| /* Check the status to see if both blue and green are on now */ |
| adpa = I915_READ(crt->adpa_reg); |
| if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0) |
| ret = true; |
| else |
| ret = false; |
| |
| DRM_DEBUG_KMS("valleyview 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); |
| |
| if (IS_VALLEYVIEW(dev)) |
| return valleyview_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 struct edid *intel_crt_get_edid(struct drm_connector *connector, |
| struct i2c_adapter *i2c) |
| { |
| struct edid *edid; |
| |
| edid = drm_get_edid(connector, i2c); |
| |
| if (!edid && !intel_gmbus_is_forced_bit(i2c)) { |
| DRM_DEBUG_KMS("CRT GMBUS EDID read failed, retry using GPIO bit-banging\n"); |
| intel_gmbus_force_bit(i2c, true); |
| edid = drm_get_edid(connector, i2c); |
| intel_gmbus_force_bit(i2c, false); |
| } |
| |
| return edid; |
| } |
| |
| /* local version of intel_ddc_get_modes() to use intel_crt_get_edid() */ |
| static int intel_crt_ddc_get_modes(struct drm_connector *connector, |
| struct i2c_adapter *adapter) |
| { |
| struct edid *edid; |
| int ret; |
| |
| edid = intel_crt_get_edid(connector, adapter); |
| if (!edid) |
| return 0; |
| |
| ret = intel_connector_update_modes(connector, edid); |
| kfree(edid); |
| |
| 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; |
| struct edid *edid; |
| struct i2c_adapter *i2c; |
| |
| BUG_ON(crt->base.type != INTEL_OUTPUT_ANALOG); |
| |
| i2c = intel_gmbus_get_adapter(dev_priv, dev_priv->vbt.crt_ddc_pin); |
| edid = intel_crt_get_edid(connector, i2c); |
| |
| if (edid) { |
| bool is_digital = edid->input & DRM_EDID_INPUT_DIGITAL; |
| |
| /* |
| * 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. |
| */ |
| if (!is_digital) { |
| DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n"); |
| return true; |
| } |
| |
| DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [EDID reports a digital panel]\n"); |
| } else { |
| DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [no valid EDID found]\n"); |
| } |
| |
| kfree(edid); |
| |
| 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 drm_i915_private *dev_priv = dev->dev_private; |
| struct intel_crt *crt = intel_attached_crt(connector); |
| struct intel_encoder *intel_encoder = &crt->base; |
| enum intel_display_power_domain power_domain; |
| enum drm_connector_status status; |
| struct intel_load_detect_pipe tmp; |
| struct drm_modeset_acquire_ctx ctx; |
| |
| intel_runtime_pm_get(dev_priv); |
| |
| DRM_DEBUG_KMS("[CONNECTOR:%d:%s] force=%d\n", |
| connector->base.id, connector->name, |
| force); |
| |
| power_domain = intel_display_port_power_domain(intel_encoder); |
| intel_display_power_get(dev_priv, power_domain); |
| |
| if (I915_HAS_HOTPLUG(dev)) { |
| /* We can not rely on the HPD pin always being correctly wired |
| * up, for example many KVM do not pass it through, and so |
| * only trust an assertion that the monitor is connected. |
| */ |
| if (intel_crt_detect_hotplug(connector)) { |
| DRM_DEBUG_KMS("CRT detected via hotplug\n"); |
| status = connector_status_connected; |
| goto out; |
| } else |
| DRM_DEBUG_KMS("CRT not detected via hotplug\n"); |
| } |
| |
| if (intel_crt_detect_ddc(connector)) { |
| status = connector_status_connected; |
| goto out; |
| } |
| |
| /* Load detection is broken on HPD capable machines. Whoever wants a |
| * broken monitor (without edid) to work behind a broken kvm (that fails |
| * to have the right resistors for HP detection) needs to fix this up. |
| * For now just bail out. */ |
| if (I915_HAS_HOTPLUG(dev)) { |
| status = connector_status_disconnected; |
| goto out; |
| } |
| |
| if (!force) { |
| status = connector->status; |
| goto out; |
| } |
| |
| /* for pre-945g platforms use load detect */ |
| if (intel_get_load_detect_pipe(connector, NULL, &tmp, &ctx)) { |
| if (intel_crt_detect_ddc(connector)) |
| status = connector_status_connected; |
| else |
| status = intel_crt_load_detect(crt); |
| intel_release_load_detect_pipe(connector, &tmp, &ctx); |
| } else |
| status = connector_status_unknown; |
| |
| out: |
| intel_display_power_put(dev_priv, power_domain); |
| intel_runtime_pm_put(dev_priv); |
| |
| return status; |
| } |
| |
| static void intel_crt_destroy(struct drm_connector *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; |
| struct intel_crt *crt = intel_attached_crt(connector); |
| struct intel_encoder *intel_encoder = &crt->base; |
| enum intel_display_power_domain power_domain; |
| int ret; |
| struct i2c_adapter *i2c; |
| |
| power_domain = intel_display_port_power_domain(intel_encoder); |
| intel_display_power_get(dev_priv, power_domain); |
| |
| i2c = intel_gmbus_get_adapter(dev_priv, dev_priv->vbt.crt_ddc_pin); |
| ret = intel_crt_ddc_get_modes(connector, i2c); |
| if (ret || !IS_G4X(dev)) |
| goto out; |
| |
| /* Try to probe digital port for output in DVI-I -> VGA mode. */ |
| i2c = intel_gmbus_get_adapter(dev_priv, GMBUS_PORT_DPB); |
| ret = intel_crt_ddc_get_modes(connector, i2c); |
| |
| out: |
| intel_display_power_put(dev_priv, power_domain); |
| |
| return ret; |
| } |
| |
| 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 drm_i915_private *dev_priv = dev->dev_private; |
| struct intel_crt *crt = intel_attached_crt(connector); |
| |
| if (INTEL_INFO(dev)->gen >= 5) { |
| u32 adpa; |
| |
| adpa = I915_READ(crt->adpa_reg); |
| adpa &= ~ADPA_CRT_HOTPLUG_MASK; |
| adpa |= ADPA_HOTPLUG_BITS; |
| I915_WRITE(crt->adpa_reg, adpa); |
| POSTING_READ(crt->adpa_reg); |
| |
| DRM_DEBUG_KMS("pch crt adpa set to 0x%x\n", adpa); |
| crt->force_hotplug_required = 1; |
| } |
| |
| } |
| |
| /* |
| * Routines for controlling stuff on the analog port |
| */ |
| |
| static const struct drm_connector_funcs intel_crt_connector_funcs = { |
| .reset = intel_crt_reset, |
| .dpms = intel_crt_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_INFO("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"), |
| }, |
| }, |
| { |
| .callback = intel_no_crt_dmi_callback, |
| .ident = "DELL XPS 8700", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "XPS 8700"), |
| }, |
| }, |
| { } |
| }; |
| |
| 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(*intel_connector), GFP_KERNEL); |
| if (!intel_connector) { |
| kfree(crt); |
| return; |
| } |
| |
| connector = &intel_connector->base; |
| crt->connector = intel_connector; |
| 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.cloneable = (1 << INTEL_OUTPUT_DVO) | (1 << INTEL_OUTPUT_HDMI); |
| if (IS_I830(dev)) |
| crt->base.crtc_mask = (1 << 0); |
| else |
| crt->base.crtc_mask = (1 << 0) | (1 << 1) | (1 << 2); |
| |
| if (IS_GEN2(dev)) |
| connector->interlace_allowed = 0; |
| else |
| connector->interlace_allowed = 1; |
| connector->doublescan_allowed = 0; |
| |
| if (HAS_PCH_SPLIT(dev)) |
| crt->adpa_reg = PCH_ADPA; |
| else if (IS_VALLEYVIEW(dev)) |
| crt->adpa_reg = VLV_ADPA; |
| else |
| crt->adpa_reg = ADPA; |
| |
| crt->base.compute_config = intel_crt_compute_config; |
| crt->base.disable = intel_disable_crt; |
| crt->base.enable = intel_enable_crt; |
| if (I915_HAS_HOTPLUG(dev)) |
| crt->base.hpd_pin = HPD_CRT; |
| if (HAS_DDI(dev)) { |
| crt->base.get_config = hsw_crt_get_config; |
| crt->base.get_hw_state = intel_ddi_get_hw_state; |
| crt->base.pre_enable = hsw_crt_pre_enable; |
| crt->base.post_disable = hsw_crt_post_disable; |
| } else { |
| crt->base.get_config = intel_crt_get_config; |
| crt->base.get_hw_state = intel_crt_get_hw_state; |
| } |
| intel_connector->get_hw_state = intel_connector_get_hw_state; |
| intel_connector->unregister = intel_connector_unregister; |
| |
| drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs); |
| |
| drm_sysfs_connector_add(connector); |
| |
| if (!I915_HAS_HOTPLUG(dev)) |
| intel_connector->polled = DRM_CONNECTOR_POLL_CONNECT; |
| |
| /* |
| * Configure the automatic hotplug detection stuff |
| */ |
| crt->force_hotplug_required = 0; |
| |
| /* |
| * TODO: find a proper way to discover whether we need to set the the |
| * polarity and link reversal bits or not, instead of relying on the |
| * BIOS. |
| */ |
| if (HAS_PCH_LPT(dev)) { |
| u32 fdi_config = FDI_RX_POLARITY_REVERSED_LPT | |
| FDI_RX_LINK_REVERSAL_OVERRIDE; |
| |
| dev_priv->fdi_rx_config = I915_READ(_FDI_RXA_CTL) & fdi_config; |
| } |
| |
| intel_crt_reset(connector); |
| } |