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/**************************************************************************
* Copyright (c) 2011, Intel Corporation.
* All Rights Reserved.
*
* 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.
*
**************************************************************************/
#include "psb_drv.h"
#include "mid_bios.h"
#include "mdfld_output.h"
#include "mdfld_dsi_output.h"
#include "tc35876x-dsi-lvds.h"
#include <asm/intel_scu_ipc.h>
#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 BRIGHTNESS_MIN_LEVEL 1
#define BRIGHTNESS_MAX_LEVEL 100
#define BRIGHTNESS_MASK 0xFF
#define BLC_POLARITY_NORMAL 0
#define BLC_POLARITY_INVERSE 1
#define BLC_ADJUSTMENT_MAX 100
#define MDFLD_BLC_PWM_PRECISION_FACTOR 10
#define MDFLD_BLC_MAX_PWM_REG_FREQ 0xFFFE
#define MDFLD_BLC_MIN_PWM_REG_FREQ 0x2
#define MDFLD_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE)
#define MDFLD_BACKLIGHT_PWM_CTL_SHIFT (16)
static struct backlight_device *mdfld_backlight_device;
int mdfld_set_brightness(struct backlight_device *bd)
{
struct drm_device *dev =
(struct drm_device *)bl_get_data(mdfld_backlight_device);
struct drm_psb_private *dev_priv = dev->dev_private;
int level = bd->props.brightness;
DRM_DEBUG_DRIVER("backlight level set to %d\n", level);
/* Perform value bounds checking */
if (level < BRIGHTNESS_MIN_LEVEL)
level = BRIGHTNESS_MIN_LEVEL;
if (gma_power_begin(dev, false)) {
u32 adjusted_level = 0;
/*
* Adjust the backlight level with the percent in
* dev_priv->blc_adj2
*/
adjusted_level = level * dev_priv->blc_adj2;
adjusted_level = adjusted_level / BLC_ADJUSTMENT_MAX;
dev_priv->brightness_adjusted = adjusted_level;
if (mdfld_get_panel_type(dev, 0) == TC35876X) {
if (dev_priv->dpi_panel_on[0] ||
dev_priv->dpi_panel_on[2])
tc35876x_brightness_control(dev,
dev_priv->brightness_adjusted);
} else {
if (dev_priv->dpi_panel_on[0])
mdfld_dsi_brightness_control(dev, 0,
dev_priv->brightness_adjusted);
}
if (dev_priv->dpi_panel_on[2])
mdfld_dsi_brightness_control(dev, 2,
dev_priv->brightness_adjusted);
gma_power_end(dev);
}
/* cache the brightness for later use */
dev_priv->brightness = level;
return 0;
}
static int mdfld_get_brightness(struct backlight_device *bd)
{
struct drm_device *dev =
(struct drm_device *)bl_get_data(mdfld_backlight_device);
struct drm_psb_private *dev_priv = dev->dev_private;
DRM_DEBUG_DRIVER("brightness = 0x%x \n", dev_priv->brightness);
/* return locally cached var instead of HW read (due to DPST etc.) */
return dev_priv->brightness;
}
static const struct backlight_ops mdfld_ops = {
.get_brightness = mdfld_get_brightness,
.update_status = mdfld_set_brightness,
};
static int device_backlight_init(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = (struct drm_psb_private *)
dev->dev_private;
dev_priv->blc_adj1 = BLC_ADJUSTMENT_MAX;
dev_priv->blc_adj2 = BLC_ADJUSTMENT_MAX;
return 0;
}
static int mdfld_backlight_init(struct drm_device *dev)
{
struct backlight_properties props;
int ret = 0;
memset(&props, 0, sizeof(struct backlight_properties));
props.max_brightness = BRIGHTNESS_MAX_LEVEL;
props.type = BACKLIGHT_PLATFORM;
mdfld_backlight_device = backlight_device_register("mdfld-bl",
NULL, (void *)dev, &mdfld_ops, &props);
if (IS_ERR(mdfld_backlight_device))
return PTR_ERR(mdfld_backlight_device);
ret = device_backlight_init(dev);
if (ret)
return ret;
mdfld_backlight_device->props.brightness = BRIGHTNESS_MAX_LEVEL;
mdfld_backlight_device->props.max_brightness = BRIGHTNESS_MAX_LEVEL;
backlight_update_status(mdfld_backlight_device);
return 0;
}
#endif
struct backlight_device *mdfld_get_backlight_device(void)
{
#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
return mdfld_backlight_device;
#else
return NULL;
#endif
}
/*
* mdfld_save_display_registers
*
* Description: We are going to suspend so save current display
* register state.
*
* Notes: FIXME_JLIU7 need to add the support for DPI MIPI & HDMI audio
*/
static int mdfld_save_display_registers(struct drm_device *dev, int pipenum)
{
struct drm_psb_private *dev_priv = dev->dev_private;
struct medfield_state *regs = &dev_priv->regs.mdfld;
struct psb_pipe *pipe = &dev_priv->regs.pipe[pipenum];
const struct psb_offset *map = &dev_priv->regmap[pipenum];
int i;
u32 *mipi_val;
/* register */
u32 mipi_reg = MIPI;
switch (pipenum) {
case 0:
mipi_val = ®s->saveMIPI;
break;
case 1:
mipi_val = ®s->saveMIPI;
break;
case 2:
/* register */
mipi_reg = MIPI_C;
/* pointer to values */
mipi_val = ®s->saveMIPI_C;
break;
default:
DRM_ERROR("%s, invalid pipe number.\n", __func__);
return -EINVAL;
}
/* Pipe & plane A info */
pipe->dpll = PSB_RVDC32(map->dpll);
pipe->fp0 = PSB_RVDC32(map->fp0);
pipe->conf = PSB_RVDC32(map->conf);
pipe->htotal = PSB_RVDC32(map->htotal);
pipe->hblank = PSB_RVDC32(map->hblank);
pipe->hsync = PSB_RVDC32(map->hsync);
pipe->vtotal = PSB_RVDC32(map->vtotal);
pipe->vblank = PSB_RVDC32(map->vblank);
pipe->vsync = PSB_RVDC32(map->vsync);
pipe->src = PSB_RVDC32(map->src);
pipe->stride = PSB_RVDC32(map->stride);
pipe->linoff = PSB_RVDC32(map->linoff);
pipe->tileoff = PSB_RVDC32(map->tileoff);
pipe->size = PSB_RVDC32(map->size);
pipe->pos = PSB_RVDC32(map->pos);
pipe->surf = PSB_RVDC32(map->surf);
pipe->cntr = PSB_RVDC32(map->cntr);
pipe->status = PSB_RVDC32(map->status);
/*save palette (gamma) */
for (i = 0; i < 256; i++)
pipe->palette[i] = PSB_RVDC32(map->palette + (i << 2));
if (pipenum == 1) {
regs->savePFIT_CONTROL = PSB_RVDC32(PFIT_CONTROL);
regs->savePFIT_PGM_RATIOS = PSB_RVDC32(PFIT_PGM_RATIOS);
regs->saveHDMIPHYMISCCTL = PSB_RVDC32(HDMIPHYMISCCTL);
regs->saveHDMIB_CONTROL = PSB_RVDC32(HDMIB_CONTROL);
return 0;
}
*mipi_val = PSB_RVDC32(mipi_reg);
return 0;
}
/*
* mdfld_restore_display_registers
*
* Description: We are going to resume so restore display register state.
*
* Notes: FIXME_JLIU7 need to add the support for DPI MIPI & HDMI audio
*/
static int mdfld_restore_display_registers(struct drm_device *dev, int pipenum)
{
/* To get panel out of ULPS mode. */
u32 temp = 0;
u32 device_ready_reg = DEVICE_READY_REG;
struct drm_psb_private *dev_priv = dev->dev_private;
struct
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