drivers/gpu/drm/gma500/cdv_intel_crt.c - linux - Git at Google

 /*
  * 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/delay.h>
 #include <linux/i2c.h>
 #include <linux/pm_runtime.h>

 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_modeset_helper_vtables.h>
 #include <drm/drm_simple_kms_helper.h>

 #include "cdv_device.h"
 #include "intel_bios.h"
 #include "power.h"
 #include "psb_drv.h"
 #include "psb_intel_drv.h"
 #include "psb_intel_reg.h"


 static void cdv_intel_crt_dpms(struct drm_encoder *encoder, int mode)
 {
 	struct drm_device *dev = encoder->dev;
 	u32 temp, reg;
 	reg = ADPA;

 	temp = REG_READ(reg);
 	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;
 	}

 	REG_WRITE(reg, temp);
 }

 static enum drm_mode_status cdv_intel_crt_mode_valid(struct drm_connector *connector,
 				struct drm_display_mode *mode)
 {
 	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 		return MODE_NO_DBLESCAN;

 	/* The lowest clock for CDV is 20000KHz */
 	if (mode->clock < 20000)
 		return MODE_CLOCK_LOW;

 	/* The max clock for CDV is 355 instead of 400 */
 	if (mode->clock > 355000)
 		return MODE_CLOCK_HIGH;

 	return MODE_OK;
 }

 static void cdv_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 gma_crtc *gma_crtc = to_gma_crtc(crtc);
 	int dpll_md_reg;
 	u32 adpa, dpll_md;
 	u32 adpa_reg;

 	if (gma_crtc->pipe == 0)
 		dpll_md_reg = DPLL_A_MD;
 	else
 		dpll_md_reg = DPLL_B_MD;

 	adpa_reg = ADPA;

 	/*
 	 * Disable separate mode multiplier used when cloning SDVO to CRT
 	 * XXX this needs to be adjusted when we really are cloning
 	 */
 	{
 		dpll_md = REG_READ(dpll_md_reg);
 		REG_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 (gma_crtc->pipe == 0)
 		adpa |= ADPA_PIPE_A_SELECT;
 	else
 		adpa |= ADPA_PIPE_B_SELECT;

 	REG_WRITE(adpa_reg, adpa);
 }


 /*
  * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
  *
  * \return true if CRT is connected.
  * \return false if CRT is disconnected.
  */
 static bool cdv_intel_crt_detect_hotplug(struct drm_connector *connector,
 								bool force)
 {
 	struct drm_device *dev = connector->dev;
 	u32 hotplug_en;
 	int i, tries = 0, ret = false;
 	u32 orig;

 	/*
 	 * On a CDV thep, CRT detect sequence need to be done twice
 	 * to get a reliable result.
 	 */
 	tries = 2;

 	orig = hotplug_en = REG_READ(PORT_HOTPLUG_EN);
 	hotplug_en &= ~(CRT_HOTPLUG_DETECT_MASK);
 	hotplug_en |= CRT_HOTPLUG_FORCE_DETECT;

 	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 */
 		REG_WRITE(PORT_HOTPLUG_EN, hotplug_en);
 		timeout = jiffies + msecs_to_jiffies(1000);
 		/* wait for FORCE_DETECT to go off */
 		do {
 			if (!(REG_READ(PORT_HOTPLUG_EN) &
 					CRT_HOTPLUG_FORCE_DETECT))
 				break;
 			msleep(1);
 		} while (time_after(timeout, jiffies));
 	}

 	if ((REG_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) !=
 	    CRT_HOTPLUG_MONITOR_NONE)
 		ret = true;

 	 /* clear the interrupt we just generated, if any */
 	REG_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS);

 	/* and put the bits back */
 	REG_WRITE(PORT_HOTPLUG_EN, orig);
 	return ret;
 }

 static enum drm_connector_status cdv_intel_crt_detect(
 				struct drm_connector *connector, bool force)
 {
 	if (cdv_intel_crt_detect_hotplug(connector, force))
 		return connector_status_connected;
 	else
 		return connector_status_disconnected;
 }

 static void cdv_intel_crt_destroy(struct drm_connector *connector)
 {
 	struct gma_connector *gma_connector = to_gma_connector(connector);
 	struct gma_i2c_chan *ddc_bus = to_gma_i2c_chan(connector->ddc);

 	gma_i2c_destroy(ddc_bus);
 	drm_connector_cleanup(connector);
 	kfree(gma_connector);
 }

 static int cdv_intel_crt_get_modes(struct drm_connector *connector)
 {
 	return psb_intel_ddc_get_modes(connector, connector->ddc);
 }

 static int cdv_intel_crt_set_property(struct drm_connector *connector,
 				  struct drm_property *property,
 				  uint64_t value)
 {
 	return 0;
 }

 /*
  * Routines for controlling stuff on the analog port
  */

 static const struct drm_encoder_helper_funcs cdv_intel_crt_helper_funcs = {
 	.dpms = cdv_intel_crt_dpms,
 	.prepare = gma_encoder_prepare,
 	.commit = gma_encoder_commit,
 	.mode_set = cdv_intel_crt_mode_set,
 };

 static const struct drm_connector_funcs cdv_intel_crt_connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
 	.detect = cdv_intel_crt_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.destroy = cdv_intel_crt_destroy,
 	.set_property = cdv_intel_crt_set_property,
 };

 static const struct drm_connector_helper_funcs
 				cdv_intel_crt_connector_helper_funcs = {
 	.mode_valid = cdv_intel_crt_mode_valid,
 	.get_modes = cdv_intel_crt_get_modes,
 	.best_encoder = gma_best_encoder,
 };

 void cdv_intel_crt_init(struct drm_device *dev,
 			struct psb_intel_mode_device *mode_dev)
 {

 	struct gma_connector *gma_connector;
 	struct gma_encoder *gma_encoder;
 	struct gma_i2c_chan *ddc_bus;
 	struct drm_connector *connector;
 	struct drm_encoder *encoder;
 	int ret;

 	gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
 	if (!gma_encoder)
 		return;

 	gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
 	if (!gma_connector)
 		goto err_free_encoder;

 	/* Set up the DDC bus. */
 	ddc_bus = gma_i2c_create(dev, GPIOA, "CRTDDC_A");
 	if (!ddc_bus) {
 		dev_printk(KERN_ERR, dev->dev, "DDC bus registration failed.\n");
 		goto err_free_connector;
 	}

 	connector = &gma_connector->base;
 	connector->polled = DRM_CONNECTOR_POLL_HPD;
 	ret = drm_connector_init_with_ddc(dev, connector,
 					  &cdv_intel_crt_connector_funcs,
 					  DRM_MODE_CONNECTOR_VGA,
 					  &ddc_bus->base);
 	if (ret)
 		goto err_ddc_destroy;

 	encoder = &gma_encoder->base;
 	ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_DAC);
 	if (ret)
 		goto err_connector_cleanup;

 	gma_connector_attach_encoder(gma_connector, gma_encoder);

 	gma_encoder->type = INTEL_OUTPUT_ANALOG;
 	connector->interlace_allowed = 0;
 	connector->doublescan_allowed = 0;

 	drm_encoder_helper_add(encoder, &cdv_intel_crt_helper_funcs);
 	drm_connector_helper_add(connector,
 					&cdv_intel_crt_connector_helper_funcs);

 	return;

 err_connector_cleanup:
 	drm_connector_cleanup(&gma_connector->base);
 err_ddc_destroy:
 	gma_i2c_destroy(ddc_bus);
 err_free_connector:
 	kfree(gma_connector);
 err_free_encoder:
 	kfree(gma_encoder);
 	return;
 }
	/*
	* 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/delay.h>
	#include <linux/i2c.h>
	#include <linux/pm_runtime.h>

	#include <drm/drm_crtc_helper.h>
	#include <drm/drm_modeset_helper_vtables.h>
	#include <drm/drm_simple_kms_helper.h>

	#include "cdv_device.h"
	#include "intel_bios.h"
	#include "power.h"
	#include "psb_drv.h"
	#include "psb_intel_drv.h"
	#include "psb_intel_reg.h"


	static void cdv_intel_crt_dpms(struct drm_encoder *encoder, int mode)
	{
	struct drm_device *dev = encoder->dev;
	u32 temp, reg;
	reg = ADPA;

	temp = REG_READ(reg);
	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;
	}

	REG_WRITE(reg, temp);
	}

	static enum drm_mode_status cdv_intel_crt_mode_valid(struct drm_connector *connector,
	struct drm_display_mode *mode)
	{
	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
	return MODE_NO_DBLESCAN;

	/* The lowest clock for CDV is 20000KHz */
	if (mode->clock < 20000)
	return MODE_CLOCK_LOW;

	/* The max clock for CDV is 355 instead of 400 */
	if (mode->clock > 355000)
	return MODE_CLOCK_HIGH;

	return MODE_OK;
	}

	static void cdv_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 gma_crtc *gma_crtc = to_gma_crtc(crtc);
	int dpll_md_reg;
	u32 adpa, dpll_md;
	u32 adpa_reg;

	if (gma_crtc->pipe == 0)
	dpll_md_reg = DPLL_A_MD;
	else
	dpll_md_reg = DPLL_B_MD;

	adpa_reg = ADPA;

	/*
	* Disable separate mode multiplier used when cloning SDVO to CRT
	* XXX this needs to be adjusted when we really are cloning
	*/
	{
	dpll_md = REG_READ(dpll_md_reg);
	REG_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 (gma_crtc->pipe == 0)
	adpa \|= ADPA_PIPE_A_SELECT;
	else
	adpa \|= ADPA_PIPE_B_SELECT;

	REG_WRITE(adpa_reg, adpa);
	}


	/*
	* Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
	*
	* \return true if CRT is connected.
	* \return false if CRT is disconnected.
	*/
	static bool cdv_intel_crt_detect_hotplug(struct drm_connector *connector,
	bool force)
	{
	struct drm_device *dev = connector->dev;
	u32 hotplug_en;
	int i, tries = 0, ret = false;
	u32 orig;

	/*
	* On a CDV thep, CRT detect sequence need to be done twice
	* to get a reliable result.
	*/
	tries = 2;

	orig = hotplug_en = REG_READ(PORT_HOTPLUG_EN);
	hotplug_en &= ~(CRT_HOTPLUG_DETECT_MASK);
	hotplug_en \|= CRT_HOTPLUG_FORCE_DETECT;

	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 */
	REG_WRITE(PORT_HOTPLUG_EN, hotplug_en);
	timeout = jiffies + msecs_to_jiffies(1000);
	/* wait for FORCE_DETECT to go off */
	do {
	if (!(REG_READ(PORT_HOTPLUG_EN) &
	CRT_HOTPLUG_FORCE_DETECT))
	break;
	msleep(1);
	} while (time_after(timeout, jiffies));
	}

	if ((REG_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) !=
	CRT_HOTPLUG_MONITOR_NONE)
	ret = true;

	/* clear the interrupt we just generated, if any */
	REG_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS);

	/* and put the bits back */
	REG_WRITE(PORT_HOTPLUG_EN, orig);
	return ret;
	}

	static enum drm_connector_status cdv_intel_crt_detect(
	struct drm_connector *connector, bool force)
	{
	if (cdv_intel_crt_detect_hotplug(connector, force))
	return connector_status_connected;
	else
	return connector_status_disconnected;
	}

	static void cdv_intel_crt_destroy(struct drm_connector *connector)
	{
	struct gma_connector *gma_connector = to_gma_connector(connector);
	struct gma_i2c_chan *ddc_bus = to_gma_i2c_chan(connector->ddc);

	gma_i2c_destroy(ddc_bus);
	drm_connector_cleanup(connector);
	kfree(gma_connector);
	}

	static int cdv_intel_crt_get_modes(struct drm_connector *connector)
	{
	return psb_intel_ddc_get_modes(connector, connector->ddc);
	}

	static int cdv_intel_crt_set_property(struct drm_connector *connector,
	struct drm_property *property,
	uint64_t value)
	{
	return 0;
	}

	/*
	* Routines for controlling stuff on the analog port
	*/

	static const struct drm_encoder_helper_funcs cdv_intel_crt_helper_funcs = {
	.dpms = cdv_intel_crt_dpms,
	.prepare = gma_encoder_prepare,
	.commit = gma_encoder_commit,
	.mode_set = cdv_intel_crt_mode_set,
	};

	static const struct drm_connector_funcs cdv_intel_crt_connector_funcs = {
	.dpms = drm_helper_connector_dpms,
	.detect = cdv_intel_crt_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.destroy = cdv_intel_crt_destroy,
	.set_property = cdv_intel_crt_set_property,
	};

	static const struct drm_connector_helper_funcs
	cdv_intel_crt_connector_helper_funcs = {
	.mode_valid = cdv_intel_crt_mode_valid,
	.get_modes = cdv_intel_crt_get_modes,
	.best_encoder = gma_best_encoder,
	};

	void cdv_intel_crt_init(struct drm_device *dev,
	struct psb_intel_mode_device *mode_dev)
	{

	struct gma_connector *gma_connector;
	struct gma_encoder *gma_encoder;
	struct gma_i2c_chan *ddc_bus;
	struct drm_connector *connector;
	struct drm_encoder *encoder;
	int ret;

	gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
	if (!gma_encoder)
	return;

	gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
	if (!gma_connector)
	goto err_free_encoder;

	/* Set up the DDC bus. */
	ddc_bus = gma_i2c_create(dev, GPIOA, "CRTDDC_A");
	if (!ddc_bus) {
	dev_printk(KERN_ERR, dev->dev, "DDC bus registration failed.\n");
	goto err_free_connector;
	}

	connector = &gma_connector->base;
	connector->polled = DRM_CONNECTOR_POLL_HPD;
	ret = drm_connector_init_with_ddc(dev, connector,
	&cdv_intel_crt_connector_funcs,
	DRM_MODE_CONNECTOR_VGA,
	&ddc_bus->base);
	if (ret)
	goto err_ddc_destroy;

	encoder = &gma_encoder->base;
	ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_DAC);
	if (ret)
	goto err_connector_cleanup;

	gma_connector_attach_encoder(gma_connector, gma_encoder);

	gma_encoder->type = INTEL_OUTPUT_ANALOG;
	connector->interlace_allowed = 0;
	connector->doublescan_allowed = 0;

	drm_encoder_helper_add(encoder, &cdv_intel_crt_helper_funcs);
	drm_connector_helper_add(connector,
	&cdv_intel_crt_connector_helper_funcs);

	return;

	err_connector_cleanup:
	drm_connector_cleanup(&gma_connector->base);
	err_ddc_destroy:
	gma_i2c_destroy(ddc_bus);
	err_free_connector:
	kfree(gma_connector);
	err_free_encoder:
	kfree(gma_encoder);
	return;
	}