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Commit 6a7afe3a authored by Alan Cox's avatar Alan Cox Committed by Greg Kroah-Hartman
Browse files

gma500: continue abstracting platform specific code 



Next obvious target - backlight support

Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 92367fe1

drivers/staging/gma500/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -4,8 +4,8 @@ 
ccflags-y += -Iinclude/drm



psb_gfx-y += gem_glue.o \

	  backlight.o \

	  power.o \

	  psb_bl.o \

	  psb_drv.o \

	  psb_gem.o \

	  psb_fb.o \

drivers/staging/gma500/backlight.c

0 → 100644
+46 −0
Original line number Diff line number Diff line 
/*

 * GMA500 Backlight Interface

 *

 * Copyright (c) 2009-2011, Intel Corporation.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

 * more details.

 *

 * You should have received a copy of the GNU General Public License along with

 * this program; if not, write to the Free Software Foundation, Inc.,

 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Authors: Eric Knopp

 *

 */



#include "psb_drv.h"

#include "psb_intel_reg.h"

#include "psb_intel_drv.h"

#include "psb_intel_bios.h"

#include "psb_powermgmt.h"



int gma_backlight_init(struct drm_device *dev)

{

#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE

	struct drm_psb_private *dev_priv = dev->dev_private;

	return dev_priv->ops->backlight_init(dev);

#endif

}



void gma_backlight_exit(struct drm_device *dev)

{

#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE

	struct drm_psb_private *dev_priv = dev->dev_private;

	dev_priv->backlight_device->props.brightness = 0;

	backlight_update_status(dev_priv->backlight_device);

	if (dev_priv->backlight_device)

		backlight_device_unregister(dev_priv->backlight_device);

#endif

}

drivers/staging/gma500/mdfld_device.c

+93 −1
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
 *

 **************************************************************************/



#include <linux/backlight.h>

#include <drm/drmP.h>

#include <drm/drm.h>

#include "psb_reg.h"
@@ -27,7 +28,93 @@ 
#include "mdfld_dsi_output.h"



/*

 *	Provide the Medfield specific chip logic and low level methods

 *	Provide the Medfield specific backlight management

 */



#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE



static int mdfld_brightness;

struct backlight_device *mdfld_backlight_device;



static int mfld_set_brightness(struct backlight_device *bd)

{

	struct drm_device *dev = bl_get_data(mdfld_backlight_device);

	struct drm_psb_private *dev_priv = dev->dev_private;

	int level = bd->props.brightness;



	/* Percentage 1-100% being valid */

	if (level < 1)

		level = 1;



	if (gma_power_begin(dev, 0)) {

		/* Calculate and set the brightness value */

		u32 adjusted_level;



		/* Adjust the backlight level with the percent in

		 * dev_priv->blc_adj2;

		 */

		adjusted_level = level * dev_priv->blc_adj2;

		adjusted_level = adjusted_level / 100;

#if 0

#ifndef CONFIG_MDFLD_DSI_DPU

		if(!(dev_priv->dsr_fb_update & MDFLD_DSR_MIPI_CONTROL) && 

			(dev_priv->dbi_panel_on || dev_priv->dbi_panel_on2)){

			mdfld_dsi_dbi_exit_dsr(dev,MDFLD_DSR_MIPI_CONTROL, 0, 0);

			dev_dbg(dev->dev, "Out of DSR before set brightness to %d.\n",adjusted_level);

		}

#endif

		mdfld_dsi_brightness_control(dev, 0, adjusted_level);



		if ((dev_priv->dbi_panel_on2) || (dev_priv->dpi_panel_on2))

			mdfld_dsi_brightness_control(dev, 2, adjusted_level);

#endif

		gma_power_end(dev);

	}

	mdfld_brightness = level;

	return 0;

}



int psb_get_brightness(struct backlight_device *bd)

{

	/* return locally cached var instead of HW read (due to DPST etc.) */

	/* FIXME: ideally return actual value in case firmware fiddled with

	   it */

	return mdfld_brightness;

}



static const struct backlight_ops mfld_ops = {

	.get_brightness = psb_get_brightness,

	.update_status  = mfld_set_brightness,

};



static int mdfld_backlight_init(struct drm_device *dev)

{

	struct drm_psb_private *dev_priv = dev->dev_private;

	struct backlight_properties props;

	memset(&props, 0, sizeof(struct backlight_properties));

	props.max_brightness = 100;

	props.type = BACKLIGHT_PLATFORM;



	mdfld_backlight_device = backlight_device_register("mfld-bl",

					NULL, (void *)dev, &mfld_ops, &props);

					

	if (IS_ERR(mdfld_backlight_device))

		return PTR_ERR(mdfld_backlight_device);



	dev_priv->blc_adj1 = 100;

	dev_priv->blc_adj2 = 100;

	mdfld_backlight_device->props.brightness = 100;

	mdfld_backlight_device->props.max_brightness = 100;

	backlight_update_status(mdfld_backlight_device);

	dev_priv->backlight_device = mdfld_backlight_device;

	return 0;

}



#endif



/*

 *	Provide the Medfield specific chip logic and low level methods for

 *	power management.

 */



static void mdfld_init_pm(struct drm_device *dev)
@@ -601,6 +688,11 @@ static int mdfld_power_up(struct drm_device *dev) 


const struct psb_ops mdfld_chip_ops = {

	.output_init = mdfld_output_init,



#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE

	.backlight_init = mdfld_backlight_init,

#endif



	.init_pm = mdfld_init_pm,

	.save_regs = mdfld_save_registers,

	.restore_regs = mdfld_restore_registers,

drivers/staging/gma500/mdfld_dsi_output.c

+7 −4
Original line number Diff line number Diff line
@@ -468,6 +468,7 @@ static int mdfld_dsi_connector_set_property(struct drm_connector * connector, 
{

	struct drm_encoder * encoder = connector->encoder;

	struct backlight_device * psb_bd;

	struct drm_psb_private * dev_priv = encoder->dev->dev_private;



	if (!strcmp(property->name, "scaling mode") && encoder) {

		struct psb_intel_crtc * psb_crtc = to_psb_intel_crtc(encoder->crtc);
@@ -512,6 +513,7 @@ static int mdfld_dsi_connector_set_property(struct drm_connector * connector, 
						     &psb_crtc->saved_adjusted_mode);

			}

		}

#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE

	} else if (!strcmp(property->name, "backlight") && encoder) {

		dev_dbg(encoder->dev->dev, "backlight level = %d\n", (int)value);

		if (drm_connector_property_set_value(connector, property, value))
@@ -519,13 +521,14 @@ static int mdfld_dsi_connector_set_property(struct drm_connector * connector, 
		else {

			dev_dbg(encoder->dev->dev,

			                "set brightness to %d", (int)value);

			psb_bd = psb_get_backlight_device();

			psb_bd = dev_priv->backlight_device;

			if (psb_bd) {

				psb_bd->props.brightness = value;

				psb_set_brightness(psb_bd);

				backlight_update_status(psb_bd);

			}

		}

	} 

#endif

set_prop_done:

    return 0;

set_prop_error:

drivers/staging/gma500/mrst_device.c

+137 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
 *

 **************************************************************************/



#include <linux/backlight.h>

#include <drm/drmP.h>

#include <drm/drm.h>

#include "psb_drm.h"
@@ -41,8 +42,139 @@ static int mrst_output_init(struct drm_device *dev) 
	return -ENODEV;

}



/*

 *	Provide the low level interfaces for the Moorestown backlight

 */



#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE



#define MRST_BLC_MAX_PWM_REG_FREQ	    0xFFFF

#define BLC_PWM_PRECISION_FACTOR 100	/* 10000000 */

#define BLC_PWM_FREQ_CALC_CONSTANT 32

#define MHz 1000000

#define BLC_ADJUSTMENT_MAX 100



static struct backlight_device *mrst_backlight_device;

static int mrst_brightness;



static int mrst_set_brightness(struct backlight_device *bd)

{

	struct drm_device *dev = bl_get_data(mrst_backlight_device);

	struct drm_psb_private *dev_priv = dev->dev_private;

	int level = bd->props.brightness;

	u32 blc_pwm_ctl;

	u32 max_pwm_blc;



	/* Percentage 1-100% being valid */

	if (level < 1)

		level = 1;



	if (gma_power_begin(dev, 0)) {

		/* Calculate and set the brightness value */

		max_pwm_blc = REG_READ(BLC_PWM_CTL) >> 16;

		blc_pwm_ctl = level * max_pwm_blc / 100;



		/* Adjust the backlight level with the percent in

		 * dev_priv->blc_adj1;

		 */

		blc_pwm_ctl = blc_pwm_ctl * dev_priv->blc_adj1;

		blc_pwm_ctl = blc_pwm_ctl / 100;



		/* Adjust the backlight level with the percent in

		 * dev_priv->blc_adj2;

		 */

		blc_pwm_ctl = blc_pwm_ctl * dev_priv->blc_adj2;

		blc_pwm_ctl = blc_pwm_ctl / 100;



		/* force PWM bit on */

		REG_WRITE(BLC_PWM_CTL2, (0x80000000 | REG_READ(BLC_PWM_CTL2)));

		REG_WRITE(BLC_PWM_CTL, (max_pwm_blc << 16) | blc_pwm_ctl);

		gma_power_end(dev);

	}

	mrst_brightness = level;

	return 0;

}



static int mrst_get_brightness(struct backlight_device *bd)

{

	/* return locally cached var instead of HW read (due to DPST etc.) */

	/* FIXME: ideally return actual value in case firmware fiddled with

	   it */

	return mrst_brightness;

}



static int device_backlight_init(struct drm_device *dev)

{

	struct drm_psb_private *dev_priv = dev->dev_private;

	unsigned long core_clock;

	u16 bl_max_freq;

	uint32_t value;

	uint32_t blc_pwm_precision_factor;



	dev_priv->blc_adj1 = BLC_ADJUSTMENT_MAX;

	dev_priv->blc_adj2 = BLC_ADJUSTMENT_MAX;

	bl_max_freq = 256;

	/* this needs to be set elsewhere */

	blc_pwm_precision_factor = BLC_PWM_PRECISION_FACTOR;



	core_clock = dev_priv->core_freq;



	value = (core_clock * MHz) / BLC_PWM_FREQ_CALC_CONSTANT;

	value *= blc_pwm_precision_factor;

	value /= bl_max_freq;

	value /= blc_pwm_precision_factor;



	if (gma_power_begin(dev, false)) {

		if (value > (unsigned long long)MRST_BLC_MAX_PWM_REG_FREQ)

				return -ERANGE;

		else {

			REG_WRITE(BLC_PWM_CTL2,

					(0x80000000 | REG_READ(BLC_PWM_CTL2)));

			REG_WRITE(BLC_PWM_CTL, value | (value << 16));

		}

		gma_power_end(dev);

	}

	return 0;

}



static const struct backlight_ops mrst_ops = {

	.get_brightness = mrst_get_brightness,

	.update_status  = mrst_set_brightness,

};



int mrst_backlight_init(struct drm_device *dev)

{

	struct drm_psb_private *dev_priv = dev->dev_private;

	int ret;

	struct backlight_properties props;



	memset(&props, 0, sizeof(struct backlight_properties));

	props.max_brightness = 100;

	props.type = BACKLIGHT_PLATFORM;



	mrst_backlight_device = backlight_device_register("mrst-bl",

					NULL, (void *)dev, &mrst_ops, &props);

					

	if (IS_ERR(mrst_backlight_device))

		return PTR_ERR(mrst_backlight_device);



	ret = device_backlight_init(dev);

	if (ret < 0) {

		backlight_device_unregister(mrst_backlight_device);

		return ret;

	}

	mrst_backlight_device->props.brightness = 100;

	mrst_backlight_device->props.max_brightness = 100;

	backlight_update_status(mrst_backlight_device);

	dev_priv->backlight_device = mrst_backlight_device;

	return 0;

}



#endif



/*

 *	Provide the Moorestown specific chip logic and low level methods

 *	for power management

 */



static void mrst_init_pm(struct drm_device *dev)
@@ -221,6 +353,11 @@ static int mrst_power_up(struct drm_device *dev) 


const struct psb_ops mrst_chip_ops = {

	.output_init = mrst_output_init,



#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE

	.backlight_init = mrst_backlight_init,

#endif

	

	.init_pm = mrst_init_pm,

	.save_regs = mrst_save_display_registers,

	.restore_regs = mrst_restore_display_registers,