/*
* Copyright 2006 Dave Airlie <airlied@linux.ie>
* Copyright © 2006-2009 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>
* Jesse Barnes <jesse.barnes@intel.com>
*/
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include "drmP.h"
#include "drm.h"
#include "drm_crtc.h"
#include "drm_edid.h"
#include "intel_drv.h"
#include "i915_drm.h"
#include "i915_drv.h"
struct intel_hdmi_priv {
u32 sdvox_reg;
u32 save_SDVOX;
bool has_hdmi_sink;
};
static void intel_hdmi_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_i915_private *dev_priv = dev->dev_private;
struct drm_crtc *crtc = encoder->crtc;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct intel_output *intel_output = enc_to_intel_output(encoder);
struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
u32 sdvox;
sdvox = SDVO_ENCODING_HDMI |
SDVO_BORDER_ENABLE |
SDVO_VSYNC_ACTIVE_HIGH |
SDVO_HSYNC_ACTIVE_HIGH;
if (hdmi_priv->has_hdmi_sink)
sdvox |= SDVO_AUDIO_ENABLE;
if (intel_crtc->pipe == 1)
sdvox |= SDVO_PIPE_B_SELECT;
I915_WRITE(hdmi_priv->sdvox_reg, sdvox);
POSTING_READ(hdmi_priv->sdvox_reg);
}
static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
{
struct drm_device *dev = encoder->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_output *intel_output = enc_to_intel_output(encoder);
struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
u32 temp;
temp = I915_READ(hdmi_priv->sdvox_reg);
/* HW workaround, need to toggle enable bit off and on for 12bpc, but
* we do this anyway which shows more stable in testing.
*/
if (HAS_PCH_SPLIT(dev)) {
I915_WRITE(hdmi_priv->sdvox_reg, temp & ~SDVO_ENABLE);
POSTING_READ(hdmi_priv->sdvox_reg);
}
if (mode != DRM_MODE_DPMS_ON) {
temp &= ~SDVO_ENABLE;
} else {
temp |= SDVO_ENABLE;
}
I915_WRITE(hdmi_priv->sdvox_reg, temp);
POSTING_READ(hdmi_priv->sdvox_reg);
/* HW workaround, need to write this twice for issue that may result
* in first write getting masked.
*/
if (HAS_PCH_SPLIT(dev)) {
I915_WRITE(hdmi_priv->sdvox_reg, temp);
POSTING_READ(hdmi_priv->sdvox_reg);
}
}
static void intel_hdmi_save(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_output *intel_output = to_intel_output(connector);
struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
hdmi_priv->save_SDVOX = I915_READ(hdmi_priv->sdvox_reg);
}
static void intel_hdmi_restore(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_output *intel_output = to_intel_output(connector);
struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
I915_WRITE(hdmi_priv->sdvox_reg, hdmi_priv->save_SDVOX);
POSTING_READ(hdmi_priv->sdvox_reg);
}
static int intel_hdmi_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
if (mode->clock > 165000)
return MODE_CLOCK_HIGH;
if (mode->clock < 20000)
return MODE_CLOCK_HIGH;
if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
return MODE_NO_DBLESCAN;
return MODE_OK;
}
static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
return true;
}
static enum drm_connector_status
intel_hdmi_detect(struct drm_connector *connector)
{
struct intel_output *intel_output = to_intel_output(connector);
struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
struct edid *edid = NULL;
enum drm_connector_status status = connector_status_disconnected;
hdmi_priv->has_hdmi_sink = false;
edid = drm_get_edid(&intel_output->base,
intel_output->ddc_bus);
if (edid) {
if (edid->input & DRM_EDID_INPUT_DIGITAL) {
status = connector_status_connected;
hdmi_priv->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
}
intel_output->base.display_info.raw_edid = NULL;
kfree(edid);
}
return status;
}
static int intel_hdmi_get_modes(struct drm_connector *connector)
{
struct intel_output *intel_output = to_intel_output(connector);
/* We should parse the EDID data and find out if it's an HDMI sink so
* we can send audio to it.
*/
return intel_ddc_get_modes(intel_output);
}
static void intel_hdmi_destroy(struct drm_connector *connector)
{
struct intel_output *intel_output = to_intel_output(connector);
if (intel_output->i2c_bus)
intel_i2c_destroy(intel_output->i2c_bus);
drm_sysfs_connector_remove(connector);
drm_connector_cleanup(connector);
kfree(intel_output);
}
static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
.dpms = intel_hdmi_dpms,
.mode_fixup = intel_hdmi_mode_fixup,
.prepare = intel_encoder_prepare,
.mode_set = intel_hdmi_mode_set,
.commit = intel_encoder_commit,
};
static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
.dpms = drm_helper_connector_dpms,
.save = intel_hdmi_save,
.restore = intel_hdmi_restore,
.detect = intel_hdmi_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = intel_hdmi_destroy,
};
static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
.get_modes = intel_hdmi_get_modes,
.mode_valid = intel_hdmi_mode_valid,
.best_encoder = intel_best_encoder,
};
static void intel_hdmi_enc_destroy(struct drm_encoder *encoder)
{
drm_encoder_cleanup(encoder);
}
static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
.destroy = intel_hdmi_enc_destroy,
};
void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_connector *connector;
struct intel_output *intel_output;
struct intel_hdmi_priv *hdmi_priv;
intel_output = kcalloc(sizeof(struct intel_output) +
sizeof(struct intel_hdmi_priv), 1, GFP_KERNEL);
if (!intel_output)
return;
hdmi_priv = (struct intel_hdmi_priv *)(intel_output + 1);
connector = &intel_output->base;
drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
DRM_MODE_CONNECTOR_HDMIA);
drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
intel_output->type = INTEL_OUTPUT_HDMI;
connector->interlace_allowed = 0;
connector->doublescan_allowed = 0;
intel_output->crtc_mask = (1 << 0) | (1 << 1);
/* Set up the DDC bus. */
if (sdvox_reg == SDVOB) {
intel_output->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
intel_output->ddc_bus = intel_i2c_create(dev, GPIOE, "HDMIB");
dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
} else if (sdvox_reg == SDVOC) {
intel_output->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "HDMIC");
dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
} else if (sdvox_reg == HDMIB) {
intel_output->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOE,
"HDMIB");
dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
} else if (sdvox_reg == HDMIC) {
intel_output->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOD,
"HDMIC");
dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
} else if (sdvox_reg == HDMID) {
intel_output->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOF,
"HDMID");
dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
}
if (!intel_output->ddc_bus)
goto err_connector;
hdmi_priv->sdvox_reg = sdvox_reg;
intel_output->dev_priv = hdmi_priv;
drm_encoder_init(dev, &intel_output->enc, &intel_hdmi_enc_funcs,
DRM_MODE_ENCODER_TMDS);
drm_encoder_helper_add(&intel_output->enc, &intel_hdmi_helper_funcs);
drm_mode_connector_attach_encoder(&intel_output->base,
&intel_output->enc);
drm_sysfs_connector_add(connector);
/* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
* 0xd. Failure to do so will result in spurious interrupts being
* generated on the port when a cable is not attached.
*/
if (IS_G4X(dev) && !IS_GM45(dev)) {
u32 temp = I915_READ(PEG_BAND_GAP_DATA);
I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
}
return;
err_connector:
drm_connector_cleanup(connector);
kfree(intel_output);
return;
}
