![Ma Ling](/assets/img/avatar_default.png)
Although spec say CRT_HOTPLUG_ACTIVATION_PERIOD_64 is only useful for mobile platform, it is also required to detect vga on G4x desktops correctly. Tested on G45/G43/Q45 platforms with no regressions. It fixed freedesktop.org bug #21120 and part of bug #21210 Signed-off-by: Ma Ling <ling.ma@intel.com> Signed-off-by: Eric Anholt <eric@anholt.net>
317 lines
8.4 KiB
C
317 lines
8.4 KiB
C
/*
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* Copyright © 2006-2007 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Eric Anholt <eric@anholt.net>
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*/
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#include <linux/i2c.h>
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#include "drmP.h"
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#include "drm.h"
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#include "drm_crtc.h"
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#include "drm_crtc_helper.h"
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#include "intel_drv.h"
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#include "i915_drm.h"
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#include "i915_drv.h"
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static void intel_crt_dpms(struct drm_encoder *encoder, int mode)
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{
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struct drm_device *dev = encoder->dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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u32 temp;
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temp = I915_READ(ADPA);
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temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
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temp |= ADPA_DAC_ENABLE;
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switch(mode) {
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case DRM_MODE_DPMS_ON:
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temp |= ADPA_DAC_ENABLE;
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break;
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case DRM_MODE_DPMS_STANDBY:
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temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
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break;
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case DRM_MODE_DPMS_SUSPEND:
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temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
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break;
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case DRM_MODE_DPMS_OFF:
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temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
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break;
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}
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I915_WRITE(ADPA, temp);
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}
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static int intel_crt_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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struct drm_device *dev = connector->dev;
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int max_clock = 0;
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if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
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return MODE_NO_DBLESCAN;
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if (mode->clock < 25000)
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return MODE_CLOCK_LOW;
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if (!IS_I9XX(dev))
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max_clock = 350000;
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else
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max_clock = 400000;
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if (mode->clock > max_clock)
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return MODE_CLOCK_HIGH;
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return MODE_OK;
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}
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static bool intel_crt_mode_fixup(struct drm_encoder *encoder,
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struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode)
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{
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return true;
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}
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static void intel_crt_mode_set(struct drm_encoder *encoder,
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struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode)
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{
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struct drm_device *dev = encoder->dev;
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struct drm_crtc *crtc = encoder->crtc;
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struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
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struct drm_i915_private *dev_priv = dev->dev_private;
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int dpll_md_reg;
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u32 adpa, dpll_md;
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if (intel_crtc->pipe == 0)
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dpll_md_reg = DPLL_A_MD;
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else
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dpll_md_reg = DPLL_B_MD;
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/*
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* Disable separate mode multiplier used when cloning SDVO to CRT
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* XXX this needs to be adjusted when we really are cloning
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*/
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if (IS_I965G(dev)) {
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dpll_md = I915_READ(dpll_md_reg);
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I915_WRITE(dpll_md_reg,
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dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK);
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}
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adpa = 0;
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if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
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adpa |= ADPA_HSYNC_ACTIVE_HIGH;
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if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
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adpa |= ADPA_VSYNC_ACTIVE_HIGH;
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if (intel_crtc->pipe == 0) {
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adpa |= ADPA_PIPE_A_SELECT;
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I915_WRITE(BCLRPAT_A, 0);
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} else {
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adpa |= ADPA_PIPE_B_SELECT;
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I915_WRITE(BCLRPAT_B, 0);
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}
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I915_WRITE(ADPA, adpa);
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}
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/**
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* Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
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*
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* Not for i915G/i915GM
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*
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* \return true if CRT is connected.
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* \return false if CRT is disconnected.
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*/
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static bool intel_crt_detect_hotplug(struct drm_connector *connector)
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{
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struct drm_device *dev = connector->dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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u32 hotplug_en;
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int i, tries = 0;
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/*
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* On 4 series desktop, CRT detect sequence need to be done twice
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* to get a reliable result.
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*/
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if (IS_G4X(dev) && !IS_GM45(dev))
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tries = 2;
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else
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tries = 1;
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hotplug_en = I915_READ(PORT_HOTPLUG_EN);
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hotplug_en &= CRT_FORCE_HOTPLUG_MASK;
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hotplug_en |= CRT_HOTPLUG_FORCE_DETECT;
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if (IS_G4X(dev))
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hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
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hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
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for (i = 0; i < tries ; i++) {
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unsigned long timeout;
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/* turn on the FORCE_DETECT */
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I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
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timeout = jiffies + msecs_to_jiffies(1000);
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/* wait for FORCE_DETECT to go off */
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do {
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if (!(I915_READ(PORT_HOTPLUG_EN) &
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CRT_HOTPLUG_FORCE_DETECT))
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break;
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msleep(1);
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} while (time_after(timeout, jiffies));
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}
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if ((I915_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) ==
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CRT_HOTPLUG_MONITOR_COLOR)
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return true;
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return false;
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}
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static bool intel_crt_detect_ddc(struct drm_connector *connector)
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{
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struct intel_output *intel_output = to_intel_output(connector);
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/* CRT should always be at 0, but check anyway */
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if (intel_output->type != INTEL_OUTPUT_ANALOG)
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return false;
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return intel_ddc_probe(intel_output);
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}
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static enum drm_connector_status intel_crt_detect(struct drm_connector *connector)
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{
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struct drm_device *dev = connector->dev;
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if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev)) {
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if (intel_crt_detect_hotplug(connector))
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return connector_status_connected;
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else
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return connector_status_disconnected;
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}
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if (intel_crt_detect_ddc(connector))
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return connector_status_connected;
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/* TODO use load detect */
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return connector_status_unknown;
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}
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static void intel_crt_destroy(struct drm_connector *connector)
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{
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struct intel_output *intel_output = to_intel_output(connector);
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intel_i2c_destroy(intel_output->ddc_bus);
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drm_sysfs_connector_remove(connector);
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drm_connector_cleanup(connector);
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kfree(connector);
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}
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static int intel_crt_get_modes(struct drm_connector *connector)
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{
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struct intel_output *intel_output = to_intel_output(connector);
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return intel_ddc_get_modes(intel_output);
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}
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static int intel_crt_set_property(struct drm_connector *connector,
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struct drm_property *property,
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uint64_t value)
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{
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struct drm_device *dev = connector->dev;
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if (property == dev->mode_config.dpms_property && connector->encoder)
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intel_crt_dpms(connector->encoder, (uint32_t)(value & 0xf));
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return 0;
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}
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/*
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* Routines for controlling stuff on the analog port
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*/
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static const struct drm_encoder_helper_funcs intel_crt_helper_funcs = {
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.dpms = intel_crt_dpms,
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.mode_fixup = intel_crt_mode_fixup,
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.prepare = intel_encoder_prepare,
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.commit = intel_encoder_commit,
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.mode_set = intel_crt_mode_set,
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};
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static const struct drm_connector_funcs intel_crt_connector_funcs = {
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.detect = intel_crt_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = intel_crt_destroy,
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.set_property = intel_crt_set_property,
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};
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static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs = {
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.mode_valid = intel_crt_mode_valid,
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.get_modes = intel_crt_get_modes,
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.best_encoder = intel_best_encoder,
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};
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static void intel_crt_enc_destroy(struct drm_encoder *encoder)
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{
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drm_encoder_cleanup(encoder);
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}
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static const struct drm_encoder_funcs intel_crt_enc_funcs = {
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.destroy = intel_crt_enc_destroy,
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};
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void intel_crt_init(struct drm_device *dev)
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{
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struct drm_connector *connector;
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struct intel_output *intel_output;
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intel_output = kzalloc(sizeof(struct intel_output), GFP_KERNEL);
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if (!intel_output)
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return;
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connector = &intel_output->base;
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drm_connector_init(dev, &intel_output->base,
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&intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);
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drm_encoder_init(dev, &intel_output->enc, &intel_crt_enc_funcs,
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DRM_MODE_ENCODER_DAC);
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drm_mode_connector_attach_encoder(&intel_output->base,
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&intel_output->enc);
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/* Set up the DDC bus. */
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intel_output->ddc_bus = intel_i2c_create(dev, GPIOA, "CRTDDC_A");
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if (!intel_output->ddc_bus) {
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dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
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"failed.\n");
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return;
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}
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intel_output->type = INTEL_OUTPUT_ANALOG;
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connector->interlace_allowed = 0;
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connector->doublescan_allowed = 0;
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drm_encoder_helper_add(&intel_output->enc, &intel_crt_helper_funcs);
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drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);
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drm_sysfs_connector_add(connector);
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}
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