// SPDX-License-Identifier: GPL-2.0-only
/**************************************************************************
* Copyright (c) 2011, Intel Corporation.
* All Rights Reserved.
*
**************************************************************************/
#include <linux/delay.h>
#include <drm/drm.h>
#include <drm/drm_crtc_helper.h>
#include "cdv_device.h"
#include "gma_device.h"
#include "intel_bios.h"
#include "psb_drv.h"
#include "psb_intel_reg.h"
#include "psb_reg.h"
#define VGA_SR_INDEX 0x3c4
#define VGA_SR_DATA 0x3c5
static void cdv_disable_vga(struct drm_device *dev)
{
u8 sr1;
u32 vga_reg;
vga_reg = VGACNTRL;
outb(1, VGA_SR_INDEX);
sr1 = inb(VGA_SR_DATA);
outb(sr1 | 1<<5, VGA_SR_DATA);
udelay(300);
REG_WRITE(vga_reg, VGA_DISP_DISABLE);
REG_READ(vga_reg);
}
static int cdv_output_init(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
drm_mode_create_scaling_mode_property(dev);
cdv_disable_vga(dev);
cdv_intel_crt_init(dev, &dev_priv->mode_dev);
cdv_intel_lvds_init(dev, &dev_priv->mode_dev);
/* These bits indicate HDMI not SDVO on CDV */
if (REG_READ(SDVOB) & SDVO_DETECTED) {
cdv_hdmi_init(dev, &dev_priv->mode_dev, SDVOB);
if (REG_READ(DP_B) & DP_DETECTED)
cdv_intel_dp_init(dev, &dev_priv->mode_dev, DP_B);
}
if (REG_READ(SDVOC) & SDVO_DETECTED) {
cdv_hdmi_init(dev, &dev_priv->mode_dev, SDVOC);
if (REG_READ(DP_C) & DP_DETECTED)
cdv_intel_dp_init(dev, &dev_priv->mode_dev, DP_C);
}
return 0;
}
/*
* Cedartrail Backlght Interfaces
*/
static int cdv_backlight_combination_mode(struct drm_device *dev)
{
return REG_READ(BLC_PWM_CTL2) & PWM_LEGACY_MODE;
}
static u32 cdv_get_max_backlight(struct drm_device *dev)
{
u32 max = REG_READ(BLC_PWM_CTL);
if (max == 0) {
DRM_DEBUG_KMS("LVDS Panel PWM value is 0!\n");
/* i915 does this, I believe which means that we should not
* smash PWM control as firmware will take control of it. */
return 1;
}
max >>= 16;
if (cdv_backlight_combination_mode(dev))
max *= 0xff;
return max;
}
static int cdv_get_brightness(struct drm_device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev->dev);
u32 val = REG_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
if (cdv_backlight_combination_mode(dev)) {
u8 lbpc;
val &= ~1;
pci_read_config_byte(pdev, 0xF4, &lbpc);
val *= lbpc;
}
return (val * 100)/cdv_get_max_backlight(dev);
}
static void cdv_set_brightness(struct drm_device *dev, int level)
{
struct pci_dev *pdev = to_pci_dev(dev->dev);
u32 blc_pwm_ctl;
level *= cdv_get_max_backlight(dev);
level /= 100;
if (cdv_backlight_combination_mode(dev)) {
u32 max = cdv_get_max_backlight(dev);
u8 lbpc;
lbpc = level * 0xfe / max + 1;
level /= lbpc;
pci_write_config_byte(pdev, 0xF4, lbpc);
}
blc_pwm_ctl = REG_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
REG_WRITE(BLC_PWM_CTL, (blc_pwm_ctl |
(level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
}
static int cdv_backlight_init(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
dev_priv->backlight_level = cdv_get_brightness(dev);
cdv_set_brightness(dev, dev_priv->backlight_level);
return 0;
}
/*
* Provide the Cedarview specific chip logic and low level methods
* for power management
*
* FIXME: we need to implement the apm/ospm base management bits
* for this and the MID devices.
*/
static inline u32 CDV_MSG_READ32(int domain, uint port, uint offset)
{
int mcr = (0x10<<24) | (port << 16) | (offset << 8);
uint32_t ret_val = 0;
struct pci_dev *pci_root = pci_get_domain_bus_and_slot(domain, 0, 0);
pci_write_config_dword(pci_root, 0xD0, mcr);
pci_read_config_dword(pci_root, 0xD4, &ret_val);
pci_dev_put(pci_root);
return ret_val;
}
static inline void CDV_MSG_WRITE32(int domain, uint port, uint offset,
u32 value)
{
int mcr = (0x11<<24) | (port << 16) | (offset << 8) | 0xF0;
struct pci_dev *pci_root = pci_get_domain_bus_and_slot(domain, 0, 0);
pci_write_config_dword(pci_root, 0xD4, value);
pci_write_config_dword(pci_root, 0xD0, mcr);
pci_dev_put(pci_root);
}
#define PSB_PM_SSC 0x20
#define PSB_PM_SSS 0x30
#define PSB_PWRGT_GFX_ON 0x02
#define PSB_PWRGT_GFX_OFF 0x01
#define PSB_PWRGT_GFX_D0 0x00
#define PSB_PWRGT_GFX_D3 0x03
static void cdv_init_pm(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
struct pci_dev *pdev = to_pci_dev(dev->dev);
u32 pwr_cnt;
int domain = pci_domain_nr(pdev->bus);
int i;
dev_priv->apm_base = CDV_MSG_READ32(domain, PSB_PUNIT_PORT,
PSB_APMBA) & 0xFFFF;
dev_priv->ospm_base = CDV_MSG_READ32(domain, PSB_PUNIT_PORT,
PSB_OSPMBA) & 0xFFFF;
/* Power status */
pwr_cnt = inl(dev_priv->apm_base + PSB_APM_CMD);
/* Enable the GPU */
pwr_cnt &= ~PSB_PWRGT_GFX_MASK;
pwr_cnt |= PSB_PWRGT_GFX_ON;
outl(pwr_cnt, dev_priv->apm_base + PSB_APM_CMD);
/* Wait for the GPU power */
for (i = 0; i < 5; i++) {
u32 pwr_sts = inl(dev_priv->apm_base + PSB_APM_STS);
if ((pwr_sts & PSB_PWRGT_GFX_MASK) == 0)
return;
udelay(10);
}
dev_err(dev->dev, "GPU: power management timed out.\n");
}
static void cdv_errata(struct drm_device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev->dev);
/* Disable bonus launch.
* CPU and GPU competes for memory and display misses updates and
* flickers. Worst with dual core, dual displays.
*
* Fixes were done to Win 7 gfx driver to disable a feature called
* Bonus Launch to work around the issue, by degrading
* performance.
*/
CDV_MSG_WRITE32(pci_domain_nr(pdev->bus), 3, 0x30, 0x08027108);
}
/**
* cdv_save_display_registers - save registers lost on suspend
* @dev: our DRM device
*
* Save the state we need in order to be able to restore the interface
* upon resume from suspend
*/
static int cdv_save_display_registers(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
struct pci_dev *pdev = to_pci_dev(dev->dev);
struct psb_save_area *regs = &dev_priv->regs;
struct drm_connector_list_iter conn_iter;
struct drm_connector *connector;
dev_dbg(dev->dev, "Saving GPU registers.\n");
pci_read_config_byte(pdev, 0xF4, ®s->cdv.saveLBB);
regs->cdv.saveDSPCLK_GATE_D = REG_READ(DSPCLK_GATE_D);
regs->cdv.saveRAMCLK_GATE_D = REG_READ(RAMCLK_GATE_D);
regs->cdv.saveDSPARB = REG_READ(DSPARB);
regs->cdv.saveDSPFW[0] = REG_READ(DSPFW1);
regs->cdv.saveDSPFW[1] = REG_READ(DSPFW2);
regs->cdv.saveDSPFW[2] = REG_READ(DSPFW3);
regs->cdv.saveDSPFW[3] = REG_READ(DSPFW4);
regs->cdv.saveDSPFW[4] = REG_READ(DSPFW5);
regs->cdv.saveDSPFW[5] = REG_READ(DSPFW6);
regs->cdv.saveADPA = REG_READ(ADPA);
regs->cdv.savePP_CONTROL = REG_READ(PP_CONTROL);
regs->cdv.savePFIT_PGM_RATIOS = REG_READ(PFIT_PGM_RATIOS);
regs->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
regs->saveBLC_PWM_CTL2 = REG_READ(BLC_PWM_CTL2);
regs->cdv.saveLVDS = REG_READ(LVDS);
regs->cdv.savePFIT_CONTROL = REG_READ(PFIT_CONTROL);
regs->cdv.savePP_ON_DELAYS = REG_READ(PP_ON_DELAYS);
regs->cdv.savePP_OFF_DELAYS = REG_READ(PP_OFF_DELAYS);
regs->cdv.savePP_CYCLE = REG_READ(PP_CYCLE);
regs->cdv.saveVGACNTRL = REG_READ(VGACNTRL);
regs->cdv.saveIER = REG_READ(PSB_INT_ENABLE_R);
regs->cdv.saveIMR = REG_READ(PSB_INT_MASK_R);
drm_connector_list_iter_begin(dev, &conn_iter);
drm_for_each_connector_iter(connector, &conn_iter)
connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
drm_connector_list_iter_end(&conn_iter);
return 0;
}
/**
* cdv_restore_display_registers - restore lost register state
* @dev: our DRM device
*
* Restore register state that was lost during suspend and resume.
*
* FIXME: review
*/
static int cdv_restore_display_registers(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
struct pci_dev *pdev = to_pci_dev(dev->dev);
struct psb_save_area *regs = &dev_priv->regs;
struct drm_connector_list_iter conn_iter;
struct drm_connector *connector;
u32 temp;
pci_write_config_byte(pdev, 0xF4, regs->cdv.saveLBB);
REG_WRITE(DSPCLK_GATE_D, regs->cdv.saveDSPCLK_GATE_D);
REG_WRITE(RAMCLK_GATE_D, regs->cdv.saveRAMCLK_GATE_D);
/* BIOS does below anyway */
REG_WRITE(DPIO_CFG, 0);
REG_WRITE(DPIO_CFG, DPIO_MODE_SELECT_0 | DPIO_CMN_RESET_N);
temp = REG_READ(DPLL_A);
if ((temp & DPLL_SYNCLOCK_ENABLE) == 0) {
REG_WRITE(DPLL_A, temp | DPLL_SYNCLOCK_ENABLE);
REG_READ(DPLL_A);
}
temp = REG_READ(DPLL_B);
if ((temp & DPLL_SYNCLOCK_ENABLE) == 0) {
REG_WRITE(DPLL_B, temp | DPLL_SYNCLOCK_ENABLE);
REG_READ(DPLL_B);
}
udelay(500);
REG_WRITE(DSPFW1, regs->cdv.saveDSPFW[0]);
REG_WRITE(DSPFW2, regs->cdv.saveDSPFW[1]);
REG_WRITE(DSPFW3, regs->cdv.saveDSPFW[2]);
REG_WRITE(DSPFW4, regs->cdv.saveDSPFW[3]);
REG_WRITE(DSPFW5, regs->cdv.saveDSPFW[4]);
REG_WRITE(DSPFW6, regs->cdv.saveDSPFW[5]);
REG_WRITE(DSPARB, regs->cdv.saveDSPARB);
REG_WRITE(ADPA, regs->cdv.saveADPA);
REG_WRITE(BLC_PWM_CTL2, regs->saveBLC_PWM_CTL2);
REG_WRITE(LVDS, regs->cdv.saveLVDS);
REG_WRITE(PFIT_CONTROL, regs->cdv.savePFIT_CONTROL);
REG_WRITE(PFIT_PGM_RATIOS, regs->cdv.savePFIT_PGM_RATIOS);
REG_WRITE(BLC_PWM_CTL, regs->saveBLC_PWM_CTL);
REG_WRITE(PP_ON_DELAYS, regs->cdv.savePP_ON_DELAYS);
REG_WRITE(PP_OFF_DELAYS, regs->cdv.savePP_OFF_DELAYS);
REG_WRITE(PP_CYCLE, regs->cdv.savePP_CYCLE);
REG_WRITE(PP_CONTROL, regs->cdv.savePP_CONTROL);
REG_WRITE(VGACNTRL, regs->cdv.saveVGACNTRL);
REG_WRITE(PSB_INT_ENABLE_R, regs->cdv.saveIER);
REG_WRITE(PSB_INT_MASK_R, regs->cdv.saveIMR);
/* Fix arbitration bug */
cdv_errata(dev);
drm_mode_config_reset(dev);
drm_connector_list_iter_begin(dev, &conn_iter);
drm_for_each_connector_iter(connector, &conn_iter)
connector->funcs->dpms(connector, DRM_MODE_DPMS_ON);
drm_connector_list_iter_end(&conn_iter);
/* Resume the modeset for every activated CRTC */
drm_helper_resume_force_mode(dev);
return 0;
}
static int cdv_power_down(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
u32 pwr_cnt, pwr_mask, pwr_sts;
int tries = 5;
pwr_cnt = inl(dev_priv->apm_base + PSB_APM_CMD);
pwr_cnt &= ~PSB_PWRGT_GFX_MASK;
pwr_cnt |= PSB_PWRGT_GFX_OFF;
pwr_mask = PSB_PWRGT_GFX_MASK;
outl(pwr_cnt, dev_priv->apm_base + PSB_APM_CMD);
while (tries--) {
pwr_sts = inl(dev_priv->apm_base + PSB_APM_STS);
if ((pwr_sts & pwr_mask) == PSB_PWRGT_GFX_D3)
return 0;
udelay(10);
}
return 0;
}
static int cdv_power_up(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
u32 pwr_cnt, pwr_mask, pwr_sts;
int tries = 5;
pwr_cnt = inl(dev_priv->apm_base + PSB_APM_CMD);
pwr_cnt &= ~PSB_PWRGT_GFX_MASK;
pwr_cnt |= PSB_PWRGT_GFX_ON;
pwr_mask = PSB_PWRGT_GFX_MASK;
outl(pwr_cnt, dev_priv->apm_base + PSB_APM_CMD);
while (tries--) {
pwr_sts = inl(dev_priv->apm_base + PSB_APM_STS);
if ((pwr_sts & pwr_mask) == PSB_PWRGT_GFX_D0)
return 0;
udelay(10);
}
return 0;
}
static void cdv_hotplug_work_func(struct work_struct *work)
{
struct drm_psb_private *dev_priv = container_of(work, struct drm_psb_private,
hotplug_work);
struct drm_device *dev = &dev_priv->dev;
/* Just fire off a uevent and let userspace tell us what to do */
drm_helper_hpd_irq_event(dev);
}
/* The core driver has received a hotplug IRQ. We are in IRQ context
so extract the needed information and kick off queued processing */
static int cdv_hotplug_event(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
schedule_work(&dev_priv->hotplug_work);
REG_WRITE(PORT_HOTPLUG_STAT, REG_READ(PORT_HOTPLUG_STAT));
return 1;
}
static void cdv_hotplug_enable(struct drm_device *dev, bool on)
{
if (on) {
u32 hotplug = REG_READ(PORT_HOTPLUG_EN);
hotplug |= HDMIB_HOTPLUG_INT_EN | HDMIC_HOTPLUG_INT_EN |
HDMID_HOTPLUG_INT_EN | CRT_HOTPLUG_INT_EN;
REG_WRITE(PORT_HOTPLUG_EN, hotplug);
} else {
REG_WRITE(PORT_HOTPLUG_EN, 0);
REG_WRITE(PORT_HOTPLUG_STAT, REG_READ(PORT_HOTPLUG_STAT));
}
}
static const char *force_audio_names[] = {
"off",
"auto",
"on",
};
void cdv_intel_attach_force_audio_property(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
struct drm_property *prop;
int i;
prop = dev_priv->force_audio_property;
if (prop == NULL) {
prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
"audio",
ARRAY_SIZE(force_audio_names));
if (prop == NULL)
return;
for (i = 0; i < ARRAY_SIZE(force_audio_names); i++)
drm_property_add_enum(prop, i-1, force_audio_names[i]);
dev_priv->force_audio_property = prop;
}
drm_object_attach_property(&connector->base, prop, 0);
}
static const char *broadcast_rgb_names[] = {
"Full",
"Limited 16:235",
};
void cdv_intel_attach_broadcast_rgb_property(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
struct drm_property *prop;
int i;
prop = dev_priv->broadcast_rgb_property;
if (prop == NULL) {
prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
"Broadcast RGB",
ARRAY_SIZE(broadcast_rgb_names));
if (prop == NULL)
return;
for (i = 0; i < ARRAY_SIZE(broadcast_rgb_names); i++)
drm_property_add_enum(prop, i, broadcast_rgb_names[i]);
dev_priv->broadcast_rgb_property = prop;
}
drm_object_attach_property(&connector->base, prop, 0);
}
/* Cedarview */
static const struct psb_offset cdv_regmap[2] = {
{
.fp0 = FPA0,
.fp1 = FPA1,
.cntr = DSPACNTR,
.conf = PIPEACONF,
.src = PIPEASRC,
.dpll = DPLL_A,
.dpll_md = DPLL_A_MD,
.htotal = HTOTAL_A,
.hblank = HBLANK_A,
.hsync = HSYNC_A,
.vtotal = VTOTAL_A,
.vblank = VBLANK_A,
.vsync = VSYNC_A,
.stride = DSPASTRIDE,
.size = DSPASIZE,
.pos = DSPAPOS,
.base = DSPABASE,
.surf = DSPASURF,
.addr = DSPABASE,
.status = PIPEASTAT,
.linoff = DSPALINOFF,
.tileoff = DSPATILEOFF,
.palette = PALETTE_A,
},
{
.fp0 = FPB0,
.fp1 = FPB1,
.cntr = DSPBCNTR,
.conf = PIPEBCONF,
.src = PIPEBSRC,
.dpll = DPLL_B,
.dpll_md = DPLL_B_MD,
.htotal = HTOTAL_B,
.hblank = HBLANK_B,
.hsync = HSYNC_B,
.vtotal = VTOTAL_B,
.vblank = VBLANK_B,
.vsync = VSYNC_B,
.stride = DSPBSTRIDE,
.size = DSPBSIZE,
.pos = DSPBPOS,
.base = DSPBBASE,
.surf = DSPBSURF,
.addr = DSPBBASE,
.status = PIPEBSTAT,
.linoff = DSPBLINOFF,
.tileoff = DSPBTILEOFF,
.palette = PALETTE_B,
}
};
static int cdv_chip_setup(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
INIT_WORK(&dev_priv->hotplug_work, cdv_hotplug_work_func);
dev_priv->use_msi = true;
dev_priv->regmap = cdv_regmap;
gma_get_core_freq(dev);
psb_intel_opregion_init(dev);
psb_intel_init_bios(dev);
cdv_hotplug_enable(dev, false);
return 0;
}
/* CDV is much like Poulsbo but has MID like SGX offsets and PM */
const struct psb_ops cdv_chip_ops = {
.name = "GMA3600/3650",
.pipes = 2,
.crtcs = 2,
.hdmi_mask = (1 << 0) | (1 << 1),
.lvds_mask = (1 << 1),
.sdvo_mask = (1 << 0),
.cursor_needs_phys = 0,
.sgx_offset = MRST_SGX_OFFSET,
.chip_setup = cdv_chip_setup,
.errata = cdv_errata,
.crtc_helper = &cdv_intel_helper_funcs,
.clock_funcs = &cdv_clock_funcs,
.output_init = cdv_output_init,
.hotplug = cdv_hotplug_event,
.hotplug_enable = cdv_hotplug_enable,
.backlight_init = cdv_backlight_init,
.backlight_get = cdv_get_brightness,
.backlight_set = cdv_set_brightness,
.backlight_name = "psb-bl",
.init_pm = cdv_init_pm,
.save_regs = cdv_save_display_registers,
.restore_regs = cdv_restore_display_registers,
.save_crtc = gma_crtc_save,
.restore_crtc = gma_crtc_restore,
.power_down = cdv_power_down,
.power_up = cdv_power_up,
.update_wm = cdv_update_wm,
.disable_sr = cdv_disable_sr,
};
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