/*
* 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/i2c.h>
#include "drmP.h"
#include "drm.h"
#include "drm_crtc.h"
#include "drm_crtc_helper.h"
#include "intel_drv.h"
#include "i915_drm.h"
#include "i915_drv.h"
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;
temp = I915_READ(ADPA);
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(ADPA, 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_I9XX(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;
if (intel_crtc->pipe == 0)
dpll_md_reg = DPLL_A_MD;
else
dpll_md_reg = DPLL_B_MD;
/*
* Disable separate mode multiplier used when cloning SDVO to CRT
* XXX this needs to be adjusted when we really are cloning
*/
if (IS_I965G(dev)) {
dpll_md = I915_READ(dpll_md_reg);
I915_WRITE(dpll_md_reg,
dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK);
}
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;
if (intel_crtc->pipe == 0) {
adpa |= ADPA_PIPE_A_SELECT;
I915_WRITE(BCLRPAT_A, 0);
} else {
adpa |= ADPA_PIPE_B_SELECT;
I915_WRITE(BCLRPAT_B, 0);
}
I915_WRITE(ADPA, adpa);
}
/**
* 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;
int i, tries = 0;
/*
* 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 = I915_READ(PORT_HOTPLUG_EN);
hotplug_en &= CRT_FORCE_HOTPLUG_MASK;
hotplug_en |= CRT_HOTPLUG_FORCE_DETECT;
if (IS_GM45(dev))
hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
for (i = 0; i < tries ; i++) {
unsigned long timeout;
/* turn on the FORCE_DETECT */
I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
timeout = jiffies + msecs_to_jiffies(1000);
/* wait for FORCE_DETECT to go off */
do {
if (!(I915_READ(PORT_HOTPLUG_EN) &
CRT_HOTPLUG_FORCE_DETECT))
break;
msleep(1);
} while (time_after(timeout, jiffies));
}
if ((I915_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) ==
CRT_HOTPLUG_MONITOR_COLOR)
return true;
return false;
}
static bool intel_crt_detect_ddc(struct drm_connector *connector)
{
struct intel_output *intel_output = to_intel_output(connector);
/* CRT should always be at 0, but check anyway */
if (intel_output->type != INTEL_OUTPUT_ANALOG)
return false;
return intel_ddc_probe(intel_output);
}
static enum drm_connector_status intel_crt_detect(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev)) {
if (intel_crt_detect_hotplug(connector))
return connector_status_connected;
else
return connector_status_disconnected;
}
if (intel_crt_detect_ddc(connector))
return connector_status_connected;
/* TODO use load detect */
return connector_status_unknown;
}
static void intel_crt_destroy(struct drm_connector *connector)
{
struct intel_output *intel_output = to_intel_output(connector);
intel_i2c_destroy(intel_output->ddc_bus);
drm_sysfs_connector_remove(connector);
drm_connector_cleanup(connector);
kfree(connector);
}
static int intel_crt_get_modes(struct drm_connector *connector)
{
struct intel_output *intel_output = to_intel_output(connector);
return intel_ddc_get_modes(intel_output);
}
static int intel_crt_set_property(struct drm_connector *connector,
struct drm_property *property,
uint64_t value)
{
struct drm_device *dev = connector->dev;
if (property == dev->mode_config.dpms_property && connector->encoder)
intel_crt_dpms(connector->encoder, (uint32_t)(value & 0xf));
return 0;
}
/*
* 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 = {
.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 void intel_crt_enc_destroy(struct drm_encoder *encoder)
{
drm_encoder_cleanup(encoder);
}
static const struct drm_encoder_funcs intel_crt_enc_funcs = {
.destroy = intel_crt_enc_destroy,
};
void intel_crt_init(struct drm_device *dev)
{
struct drm_connector *connector;
struct intel_output *intel_output;
intel_output = kzalloc(sizeof(struct intel_output), GFP_KERNEL);
if (!intel_output)
return;
connector = &intel_output->base;
drm_connector_init(dev, &intel_output->base,
&intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);
drm_encoder_init(dev, &intel_output->enc, &intel_crt_enc_funcs,
DRM_MODE_ENCODER_DAC);
drm_mode_connector_attach_encoder(&intel_output->base,
&intel_output->enc);
/* Set up the DDC bus. */
intel_output->ddc_bus = intel_i2c_create(dev, GPIOA, "CRTDDC_A");
if (!intel_output->ddc_bus) {
dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
"failed.\n");
return;
}
intel_output->type = INTEL_OUTPUT_ANALOG;
connector->interlace_allowed = 0;
connector->doublescan_allowed = 0;
drm_encoder_helper_add(&intel_output->enc, &intel_crt_helper_funcs);
drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);
drm_sysfs_connector_add(connector);
}
