350 строки
8.6 KiB
C
350 строки
8.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/**************************************************************************
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* Copyright (c) 2011, Intel Corporation.
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* All Rights Reserved.
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*
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**************************************************************************/
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#include <linux/backlight.h>
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#include <drm/drm.h>
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#include "gma_device.h"
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#include "intel_bios.h"
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#include "psb_device.h"
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#include "psb_drv.h"
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#include "psb_intel_reg.h"
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#include "psb_reg.h"
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static int psb_output_init(struct drm_device *dev)
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{
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struct drm_psb_private *dev_priv = dev->dev_private;
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psb_intel_lvds_init(dev, &dev_priv->mode_dev);
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psb_intel_sdvo_init(dev, SDVOB);
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return 0;
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}
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#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
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/*
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* Poulsbo Backlight Interfaces
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*/
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#define BLC_PWM_PRECISION_FACTOR 100 /* 10000000 */
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#define BLC_PWM_FREQ_CALC_CONSTANT 32
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#define MHz 1000000
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#define PSB_BLC_PWM_PRECISION_FACTOR 10
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#define PSB_BLC_MAX_PWM_REG_FREQ 0xFFFE
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#define PSB_BLC_MIN_PWM_REG_FREQ 0x2
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#define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE)
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#define PSB_BACKLIGHT_PWM_CTL_SHIFT (16)
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static int psb_brightness;
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static struct backlight_device *psb_backlight_device;
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static int psb_get_brightness(struct backlight_device *bd)
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{
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/* return locally cached var instead of HW read (due to DPST etc.) */
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/* FIXME: ideally return actual value in case firmware fiddled with
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it */
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return psb_brightness;
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}
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static int psb_backlight_setup(struct drm_device *dev)
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{
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struct drm_psb_private *dev_priv = dev->dev_private;
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unsigned long core_clock;
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/* u32 bl_max_freq; */
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/* unsigned long value; */
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u16 bl_max_freq;
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uint32_t value;
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uint32_t blc_pwm_precision_factor;
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/* get bl_max_freq and pol from dev_priv*/
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if (!dev_priv->lvds_bl) {
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dev_err(dev->dev, "Has no valid LVDS backlight info\n");
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return -ENOENT;
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}
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bl_max_freq = dev_priv->lvds_bl->freq;
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blc_pwm_precision_factor = PSB_BLC_PWM_PRECISION_FACTOR;
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core_clock = dev_priv->core_freq;
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value = (core_clock * MHz) / BLC_PWM_FREQ_CALC_CONSTANT;
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value *= blc_pwm_precision_factor;
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value /= bl_max_freq;
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value /= blc_pwm_precision_factor;
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if (value > (unsigned long long)PSB_BLC_MAX_PWM_REG_FREQ ||
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value < (unsigned long long)PSB_BLC_MIN_PWM_REG_FREQ)
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return -ERANGE;
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else {
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value &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR;
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REG_WRITE(BLC_PWM_CTL,
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(value << PSB_BACKLIGHT_PWM_CTL_SHIFT) | (value));
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}
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return 0;
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}
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static int psb_set_brightness(struct backlight_device *bd)
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{
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struct drm_device *dev = bl_get_data(psb_backlight_device);
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int level = bd->props.brightness;
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/* Percentage 1-100% being valid */
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if (level < 1)
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level = 1;
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psb_intel_lvds_set_brightness(dev, level);
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psb_brightness = level;
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return 0;
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}
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static const struct backlight_ops psb_ops = {
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.get_brightness = psb_get_brightness,
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.update_status = psb_set_brightness,
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};
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static int psb_backlight_init(struct drm_device *dev)
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{
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struct drm_psb_private *dev_priv = dev->dev_private;
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int ret;
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struct backlight_properties props;
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memset(&props, 0, sizeof(struct backlight_properties));
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props.max_brightness = 100;
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props.type = BACKLIGHT_PLATFORM;
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psb_backlight_device = backlight_device_register("psb-bl",
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NULL, (void *)dev, &psb_ops, &props);
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if (IS_ERR(psb_backlight_device))
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return PTR_ERR(psb_backlight_device);
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ret = psb_backlight_setup(dev);
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if (ret < 0) {
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backlight_device_unregister(psb_backlight_device);
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psb_backlight_device = NULL;
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return ret;
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}
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psb_backlight_device->props.brightness = 100;
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psb_backlight_device->props.max_brightness = 100;
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backlight_update_status(psb_backlight_device);
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dev_priv->backlight_device = psb_backlight_device;
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/* This must occur after the backlight is properly initialised */
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psb_lid_timer_init(dev_priv);
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return 0;
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}
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#endif
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/*
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* Provide the Poulsbo specific chip logic and low level methods
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* for power management
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*/
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static void psb_init_pm(struct drm_device *dev)
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{
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struct drm_psb_private *dev_priv = dev->dev_private;
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u32 gating = PSB_RSGX32(PSB_CR_CLKGATECTL);
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gating &= ~3; /* Disable 2D clock gating */
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gating |= 1;
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PSB_WSGX32(gating, PSB_CR_CLKGATECTL);
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PSB_RSGX32(PSB_CR_CLKGATECTL);
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}
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/**
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* psb_save_display_registers - save registers lost on suspend
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* @dev: our DRM device
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*
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* Save the state we need in order to be able to restore the interface
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* upon resume from suspend
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*/
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static int psb_save_display_registers(struct drm_device *dev)
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{
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struct drm_psb_private *dev_priv = dev->dev_private;
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struct drm_crtc *crtc;
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struct gma_connector *connector;
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struct psb_state *regs = &dev_priv->regs.psb;
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/* Display arbitration control + watermarks */
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regs->saveDSPARB = PSB_RVDC32(DSPARB);
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regs->saveDSPFW1 = PSB_RVDC32(DSPFW1);
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regs->saveDSPFW2 = PSB_RVDC32(DSPFW2);
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regs->saveDSPFW3 = PSB_RVDC32(DSPFW3);
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regs->saveDSPFW4 = PSB_RVDC32(DSPFW4);
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regs->saveDSPFW5 = PSB_RVDC32(DSPFW5);
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regs->saveDSPFW6 = PSB_RVDC32(DSPFW6);
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regs->saveCHICKENBIT = PSB_RVDC32(DSPCHICKENBIT);
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/* Save crtc and output state */
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drm_modeset_lock_all(dev);
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list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
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if (drm_helper_crtc_in_use(crtc))
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dev_priv->ops->save_crtc(crtc);
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}
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list_for_each_entry(connector, &dev->mode_config.connector_list, base.head)
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if (connector->save)
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connector->save(&connector->base);
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drm_modeset_unlock_all(dev);
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return 0;
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}
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/**
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* psb_restore_display_registers - restore lost register state
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* @dev: our DRM device
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*
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* Restore register state that was lost during suspend and resume.
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*/
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static int psb_restore_display_registers(struct drm_device *dev)
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{
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struct drm_psb_private *dev_priv = dev->dev_private;
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struct drm_crtc *crtc;
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struct gma_connector *connector;
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struct psb_state *regs = &dev_priv->regs.psb;
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/* Display arbitration + watermarks */
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PSB_WVDC32(regs->saveDSPARB, DSPARB);
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PSB_WVDC32(regs->saveDSPFW1, DSPFW1);
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PSB_WVDC32(regs->saveDSPFW2, DSPFW2);
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PSB_WVDC32(regs->saveDSPFW3, DSPFW3);
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PSB_WVDC32(regs->saveDSPFW4, DSPFW4);
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PSB_WVDC32(regs->saveDSPFW5, DSPFW5);
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PSB_WVDC32(regs->saveDSPFW6, DSPFW6);
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PSB_WVDC32(regs->saveCHICKENBIT, DSPCHICKENBIT);
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/*make sure VGA plane is off. it initializes to on after reset!*/
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PSB_WVDC32(0x80000000, VGACNTRL);
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drm_modeset_lock_all(dev);
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list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
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if (drm_helper_crtc_in_use(crtc))
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dev_priv->ops->restore_crtc(crtc);
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list_for_each_entry(connector, &dev->mode_config.connector_list, base.head)
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if (connector->restore)
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connector->restore(&connector->base);
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drm_modeset_unlock_all(dev);
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return 0;
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}
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static int psb_power_down(struct drm_device *dev)
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{
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return 0;
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}
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static int psb_power_up(struct drm_device *dev)
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{
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return 0;
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}
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/* Poulsbo */
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static const struct psb_offset psb_regmap[2] = {
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{
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.fp0 = FPA0,
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.fp1 = FPA1,
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.cntr = DSPACNTR,
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.conf = PIPEACONF,
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.src = PIPEASRC,
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.dpll = DPLL_A,
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.htotal = HTOTAL_A,
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.hblank = HBLANK_A,
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.hsync = HSYNC_A,
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.vtotal = VTOTAL_A,
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.vblank = VBLANK_A,
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.vsync = VSYNC_A,
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.stride = DSPASTRIDE,
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.size = DSPASIZE,
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.pos = DSPAPOS,
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.base = DSPABASE,
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.surf = DSPASURF,
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.addr = DSPABASE,
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.status = PIPEASTAT,
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.linoff = DSPALINOFF,
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.tileoff = DSPATILEOFF,
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.palette = PALETTE_A,
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},
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{
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.fp0 = FPB0,
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.fp1 = FPB1,
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.cntr = DSPBCNTR,
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.conf = PIPEBCONF,
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.src = PIPEBSRC,
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.dpll = DPLL_B,
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.htotal = HTOTAL_B,
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.hblank = HBLANK_B,
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.hsync = HSYNC_B,
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.vtotal = VTOTAL_B,
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.vblank = VBLANK_B,
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.vsync = VSYNC_B,
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.stride = DSPBSTRIDE,
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.size = DSPBSIZE,
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.pos = DSPBPOS,
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.base = DSPBBASE,
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.surf = DSPBSURF,
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.addr = DSPBBASE,
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.status = PIPEBSTAT,
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.linoff = DSPBLINOFF,
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.tileoff = DSPBTILEOFF,
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.palette = PALETTE_B,
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}
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};
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static int psb_chip_setup(struct drm_device *dev)
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{
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struct drm_psb_private *dev_priv = dev->dev_private;
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dev_priv->regmap = psb_regmap;
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gma_get_core_freq(dev);
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gma_intel_setup_gmbus(dev);
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psb_intel_opregion_init(dev);
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psb_intel_init_bios(dev);
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return 0;
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}
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static void psb_chip_teardown(struct drm_device *dev)
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{
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struct drm_psb_private *dev_priv = dev->dev_private;
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psb_lid_timer_takedown(dev_priv);
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gma_intel_teardown_gmbus(dev);
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}
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const struct psb_ops psb_chip_ops = {
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.name = "Poulsbo",
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.pipes = 2,
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.crtcs = 2,
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.hdmi_mask = (1 << 0),
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.lvds_mask = (1 << 1),
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.sdvo_mask = (1 << 0),
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.cursor_needs_phys = 1,
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.sgx_offset = PSB_SGX_OFFSET,
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.chip_setup = psb_chip_setup,
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.chip_teardown = psb_chip_teardown,
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.crtc_helper = &psb_intel_helper_funcs,
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.crtc_funcs = &psb_intel_crtc_funcs,
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.clock_funcs = &psb_clock_funcs,
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.output_init = psb_output_init,
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#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
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.backlight_init = psb_backlight_init,
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#endif
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.init_pm = psb_init_pm,
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.save_regs = psb_save_display_registers,
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.restore_regs = psb_restore_display_registers,
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.save_crtc = gma_crtc_save,
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.restore_crtc = gma_crtc_restore,
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.power_down = psb_power_down,
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.power_up = psb_power_up,
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};
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