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/*
* 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>
static void intel_crt_dpms(struct drm_output *output, int mode)
{
struct drm_device *dev = output->dev;
DRM_DRIVER_PRIVATE_T *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 DPMSModeOn:
temp |= ADPA_DAC_ENABLE;
break;
case DPMSModeStandby:
temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
break;
case DPMSModeSuspend:
temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
break;
case DPMSModeOff:
temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
break;
}
I915_WRITE(ADPA, temp);
}
static void intel_crt_save(struct drm_output *output)
{
}
static void intel_crt_restore(struct drm_output *output)
{
}
static int intel_crt_mode_valid(struct drm_output *output,
struct drm_display_mode *mode)
{
if (mode->flags & V_DBLSCAN)
return MODE_NO_DBLESCAN;
if (mode->clock > 400000 || mode->clock < 25000)
return MODE_CLOCK_RANGE;
return MODE_OK;
}
static bool intel_crt_mode_fixup(struct drm_output *output,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
return true;
}
static void intel_crt_mode_set(struct drm_output *output,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct drm_device *dev = output->dev;
struct drm_crtc *crtc = output->crtc;
struct intel_crtc *intel_crtc = crtc->driver_private;
DRM_DRIVER_PRIVATE_T *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 & V_PHSYNC)
adpa |= ADPA_HSYNC_ACTIVE_HIGH;
if (adjusted_mode->flags & V_PVSYNC)
adpa |= ADPA_VSYNC_ACTIVE_HIGH;
if (intel_crtc->pipe == 0)
adpa |= ADPA_PIPE_A_SELECT;
else
adpa |= ADPA_PIPE_B_SELECT;
I915_WRITE(ADPA, adpa);
}
/**
* Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
*
* Only for I945G/GM.
*
* \return TRUE if CRT is connected.
* \return FALSE if CRT is disconnected.
*/
static bool intel_crt_detect_hotplug(struct drm_output *output)
{
struct drm_device *dev = output->dev;
DRM_DRIVER_PRIVATE_T *dev_priv = dev->dev_private;
u32 temp;
unsigned long timeout = jiffies + msecs_to_jiffies(1000);
temp = I915_READ(PORT_HOTPLUG_EN);
I915_WRITE(PORT_HOTPLUG_EN,
temp | CRT_HOTPLUG_FORCE_DETECT | (1 << 5));
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_output *output)
{
struct intel_output *intel_output = output->driver_private;
/* CRT should always be at 0, but check anyway */
if (intel_output->type != INTEL_OUTPUT_ANALOG)
return false;
return intel_ddc_probe(output);
}
static enum drm_output_status intel_crt_detect(struct drm_output *output)
{
struct drm_device *dev = output->dev;
if (IS_I945G(dev) || IS_I945GM(dev) || IS_I965G(dev)) {
if (intel_crt_detect_hotplug(output))
return output_status_connected;
else
return output_status_disconnected;
}
if (intel_crt_detect_ddc(output))
return output_status_connected;
/* TODO use load detect */
return output_status_unknown;
}
static void intel_crt_destroy(struct drm_output *output)
{
struct intel_output *intel_output = output->driver_private;
intel_i2c_destroy(intel_output->ddc_bus);
kfree(output->driver_private);
}
static int intel_crt_get_modes(struct drm_output *output)
{
return intel_ddc_get_modes(output);
}
/*
* Routines for controlling stuff on the analog port
*/
static const struct drm_output_funcs intel_crt_output_funcs = {
.dpms = intel_crt_dpms,
.save = intel_crt_save,
.restore = intel_crt_restore,
.mode_valid = intel_crt_mode_valid,
.mode_fixup = intel_crt_mode_fixup,
.prepare = intel_output_prepare,
.mode_set = intel_crt_mode_set,
.commit = intel_output_commit,
.detect = intel_crt_detect,
.get_modes = intel_crt_get_modes,
.cleanup = intel_crt_destroy,
};
void intel_crt_init(struct drm_device *dev)
{
struct drm_output *output;
struct intel_output *intel_output;
output = drm_output_create(dev, &intel_crt_output_funcs, "VGA");
intel_output = kmalloc(sizeof(struct intel_output), GFP_KERNEL);
if (!intel_output) {
drm_output_destroy(output);
return;
}
/* 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;
output->driver_private = intel_output;
output->interlace_allowed = 0;
output->doublescan_allowed = 0;
}
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