- 根目录:
- drivers
- staging
- gma500
- psb_irq.c
/**************************************************************************
* Copyright (c) 2007, 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.
*
* Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
* develop this driver.
*
**************************************************************************/
/*
*/
#include <drm/drmP.h>
#include "psb_drv.h"
#include "psb_reg.h"
#include "psb_intel_reg.h"
#include "psb_powermgmt.h"
/*
* inline functions
*/
static inline u32
psb_pipestat(int pipe)
{
if (pipe == 0)
return PIPEASTAT;
if (pipe == 1)
return PIPEBSTAT;
if (pipe == 2)
return PIPECSTAT;
BUG();
}
static inline u32
mid_pipe_event(int pipe)
{
if (pipe == 0)
return _PSB_PIPEA_EVENT_FLAG;
if (pipe == 1)
return _MDFLD_PIPEB_EVENT_FLAG;
if (pipe == 2)
return _MDFLD_PIPEC_EVENT_FLAG;
BUG();
}
static inline u32
mid_pipe_vsync(int pipe)
{
if (pipe == 0)
return _PSB_VSYNC_PIPEA_FLAG;
if (pipe == 1)
return _PSB_VSYNC_PIPEB_FLAG;
if (pipe == 2)
return _MDFLD_PIPEC_VBLANK_FLAG;
BUG();
}
static inline u32
mid_pipeconf(int pipe)
{
if (pipe == 0)
return PIPEACONF;
if (pipe == 1)
return PIPEBCONF;
if (pipe == 2)
return PIPECCONF;
BUG();
}
void
psb_enable_pipestat(struct drm_psb_private *dev_priv, int pipe, u32 mask)
{
if ((dev_priv->pipestat[pipe] & mask) != mask) {
u32 reg = psb_pipestat(pipe);
dev_priv->pipestat[pipe] |= mask;
/* Enable the interrupt, clear any pending status */
if (ospm_power_using_hw_begin(OSPM_DISPLAY_ISLAND,
OSPM_UHB_ONLY_IF_ON)) {
u32 writeVal = PSB_RVDC32(reg);
writeVal |= (mask | (mask >> 16));
PSB_WVDC32(writeVal, reg);
(void) PSB_RVDC32(reg);
ospm_power_using_hw_end(OSPM_DISPLAY_ISLAND);
}
}
}
void
psb_disable_pipestat(struct drm_psb_private *dev_priv, int pipe, u32 mask)
{
if ((dev_priv->pipestat[pipe] & mask) != 0) {
u32 reg = psb_pipestat(pipe);
dev_priv->pipestat[pipe] &= ~mask;
if (ospm_power_using_hw_begin(OSPM_DISPLAY_ISLAND,
OSPM_UHB_ONLY_IF_ON)) {
u32 writeVal = PSB_RVDC32(reg);
writeVal &= ~mask;
PSB_WVDC32(writeVal, reg);
(void) PSB_RVDC32(reg);
ospm_power_using_hw_end(OSPM_DISPLAY_ISLAND);
}
}
}
void mid_enable_pipe_event(struct drm_psb_private *dev_priv, int pipe)
{
if (ospm_power_using_hw_begin(OSPM_DISPLAY_ISLAND,
OSPM_UHB_ONLY_IF_ON)) {
u32 pipe_event = mid_pipe_event(pipe);
dev_priv->vdc_irq_mask |= pipe_event;
PSB_WVDC32(~dev_priv->vdc_irq_mask, PSB_INT_MASK_R);
PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
ospm_power_using_hw_end(OSPM_DISPLAY_ISLAND);
}
}
void mid_disable_pipe_event(struct drm_psb_private *dev_priv, int pipe)
{
if (dev_priv->pipestat[pipe] == 0) {
if (ospm_power_using_hw_begin(OSPM_DISPLAY_ISLAND,
OSPM_UHB_ONLY_IF_ON)) {
u32 pipe_event = mid_pipe_event(pipe);
dev_priv->vdc_irq_mask &= ~pipe_event;
PSB_WVDC32(~dev_priv->vdc_irq_mask, PSB_INT_MASK_R);
PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
ospm_power_using_hw_end(OSPM_DISPLAY_ISLAND);
}
}
}
/**
* Display controller interrupt handler for vsync/vblank.
*
*/
static void mid_vblank_handler(struct drm_device *dev, uint32_t pipe)
{
drm_handle_vblank(dev, pipe);
}
/**
* Display controller interrupt handler for pipe event.
*
*/
#define WAIT_STATUS_CLEAR_LOOP_COUNT 0xffff
static void mid_pipe_event_handler(struct drm_device *dev, uint32_t pipe)
{
struct drm_psb_private *dev_priv =
(struct drm_psb_private *) dev->dev_private;
uint32_t pipe_stat_val = 0;
uint32_t pipe_stat_reg = psb_pipestat(pipe);
uint32_t pipe_enable = dev_priv->pipestat[pipe];
uint32_t pipe_status = dev_priv->pipestat[pipe] >> 16;
uint32_t i = 0;
spin_lock(&dev_priv->irqmask_lock);
pipe_stat_val = PSB_RVDC32(pipe_stat_reg);
pipe_stat_val &= pipe_enable | pipe_status;
pipe_stat_val &= pipe_stat_val >> 16;
spin_unlock(&dev_priv->irqmask_lock);
/* clear the 2nd level interrupt status bits */
/**
* FIXME: shouldn't use while loop here. However, the interrupt
* status 'sticky' bits cannot be cleared by setting '1' to that
* bit once...
*/
for (i = 0; i < WAIT_STATUS_CLEAR_LOOP_COUNT; i++) {
PSB_WVDC32(PSB_RVDC32(pipe_stat_reg), pipe_stat_reg);
(void) PSB_RVDC32(pipe_stat_reg);
if ((PSB_RVDC32(pipe_stat_reg) & pipe_status) == 0)
break;
}
if (i == WAIT_STATUS_CLEAR_LOOP_COUNT)
DRM_ERROR("%s, can't clear the status bits in pipe_stat_reg, its value = 0x%x.\n",
__func__, PSB_RVDC32(pipe_stat_reg));
if (pipe_stat_val & PIPE_VBLANK_STATUS)
mid_vblank_handler(dev, pipe);
if (pipe_stat_val & PIPE_TE_STATUS)
drm_handle_vblank(dev, pipe);
}
/*
* Display controller interrupt handler.
*/
static void psb_vdc_interrupt(struct drm_device *dev, uint32_t vdc_stat)
{
if (vdc_stat & _PSB_PIPEA_EVENT_FLAG)
mid_pipe_event_handler(dev, 0);
}
irqreturn_t psb_irq_handler(DRM_IRQ_ARGS)
{
struct drm_device *dev = (struct drm_device *) arg;
struct drm_psb_private *dev_priv =
(struct drm_psb_private *) dev->dev_private;
uint32_t vdc_stat, dsp_int = 0, sgx_int = 0;
int handled = 0;
spin_lock(&dev_priv->irqmask_lock);
vdc_stat = PSB_RVDC32(PSB_INT_IDENTITY_R);
if (vdc_stat & _MDFLD_DISP_ALL_IRQ_FLAG) {
PSB_DEBUG_IRQ("Got DISP interrupt\n");
dsp_int = 1;
}
if (vdc_stat & _PSB_IRQ_SGX_FLAG) {
PSB_DEBUG_IRQ("Got SGX interrupt\n");
sgx_int = 1;
}
if (vdc_stat & _PSB_IRQ_MSVDX_FLAG)
PSB_DEBUG_IRQ("Got MSVDX interrupt\n");
if (vdc_stat & _LNC_IRQ_TOPAZ_FLAG)
PSB_DEBUG_IRQ("Got TOPAZ interrupt\n");
vdc_stat &= dev_priv->vdc_irq_mask;
spin_unlock(&dev_priv->irqmask_lock);
if (dsp_int && ospm_power_is_hw_on(OSPM_DISPLAY_ISLAND)) {
psb_vdc_interrupt(dev, vdc_stat);
handled = 1;
}
if (sgx_int) {
/* Not expected - we have it masked, shut it up */
u32 s, s2;
s = PSB_RSGX32(PSB_CR_EVENT_STATUS);
s2 = PSB_RSGX32(PSB_CR_EVENT_STATUS2);
PSB_WSGX32(s, PSB_CR_EVENT_HOST_CLEAR);
PSB_WSGX32(s2, PSB_CR_EVENT_HOST_CLEAR2);
/* if s & _PSB_CE_TWOD_COMPLETE we have 2D done but
we may as well poll even if we add that ! */
handled = 1;
}
PSB_WVDC32(vdc_stat, PSB_INT_IDENTITY_R);
(void) PSB_RVDC32(PSB_INT_IDENTITY_R);
DRM_READMEMORYBARRIER();
if (!handled)
return IRQ_NONE;
return IRQ_HANDLED;
}
void psb_irq_preinstall(struct drm_device *dev)
{
psb_irq_preinstall_islands(dev, OSPM_ALL_ISLANDS);
}
/**
* FIXME: should I remove display irq enable here??
*/
void psb_irq_preinstall_islands(struct drm_device *dev, int hw_islands)
{
struct drm_psb_private *dev_priv =
(struct drm_psb_private *) dev->dev_private;
unsigned long irqflags;
PSB_DEBUG_ENTRY("\n");
spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
if (hw_islands & OSPM_DISPLAY_ISLAND) {
if (ospm_power_is_hw_on(OSPM_DISPLAY_ISLAND)) {
PSB_WVDC32(0xFFFFFFFF, PSB_HWSTAM);
if (dev->vblank_enabled[0])
dev_priv->vdc_irq_mask |=
_PSB_PIPEA_EVENT_FLAG;
if (dev->vblank_enabled[1])
dev_priv->vdc_irq_mask |=
_MDFLD_PIPEB_EVENT_FLAG;
if (dev->vblank_enabled[2])
dev_priv->vdc_irq_mask |=
_MDFLD_PIPEC_EVENT_FLAG;
}
}
/* NO I DONT WANT ANY IRQS GRRR FIXMEAC */
if (hw_islands & OSPM_GRAPHICS_ISLAND)
dev_priv->vdc_irq_mask |= _PSB_IRQ_SGX_FLAG;
/* */
/*This register is safe even if display island is off*/
PSB_WVDC32(~dev_priv->vdc_irq_mask, PSB_INT_MASK_R);
spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
}
int psb_irq_postinstall(struct drm_device *dev)
{
return psb_irq_postinstall_islands(dev, OSPM_ALL_ISLANDS);
}
int psb_irq_postinstall_islands(struct drm_device *dev, int hw_islands)
{
struct drm_psb_private *dev_priv =
(struct drm_psb_private *) dev->dev_private;
unsigned long irqflags;
PSB_DEBUG_ENTRY("\n");
spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
/*This register is safe even if display island is off*/
PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
if (hw_islands & OSPM_DISPLAY_ISLAND) {
if (true/*powermgmt_is_hw_on(dev->pdev, PSB_DISPLAY_ISLAND)*/) {
PSB_WVDC32(0xFFFFFFFF, PSB_HWSTAM);
if (dev->vblank_enabled[0])
psb_enable_pipestat(dev_priv, 0,
PIPE_VBLANK_INTERRUPT_ENABLE);
else
psb_disable_pipestat(dev_priv, 0,
PIPE_VBLANK_INTERRUPT_ENABLE);
if (dev->vblank_enabled[1])
psb_enable_pipestat(dev_priv, 1,
PIPE_VBLANK_INTERRUPT_ENABLE);
else
psb_disable_pipestat(dev_priv, 1,
PIPE_VBLANK_INTERRUPT_ENABLE);
if (dev->vblank_enabled[2])
psb_enable_pipestat(dev_priv, 2,
PIPE_VBLANK_INTERRUPT_ENABLE);
else
psb_disable_pipestat(dev_priv, 2,
PIPE_VBLANK_INTERRUPT_ENABLE);
}
}
spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
return 0;
}
void psb_irq_uninstall(struct drm_device *dev)
{
psb_irq_uninstall_islands(dev, OSPM_ALL_ISLANDS);
}
void psb_irq_uninstall_islands(struct drm_device *dev, int hw_islands)
{
struct drm_psb_private *dev_priv =
(struct drm_psb_private *) dev->dev_private;
unsigned long irqflags;
PSB_DEBUG_ENTRY("\n");
spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
if (hw_islands & OSPM_DISPLAY_ISLAND) {
if (true/*powermgmt_is_hw_on(dev->pdev, PSB_DISPLAY_ISLAND)*/) {
PSB_WVDC32(0xFFFFFFFF, PSB_HWSTAM);
if (dev->vblank_enabled[0])
psb_disable_pipestat(dev_priv, 0,
PIPE_VBLANK_INTERRUPT_ENABLE);
if (dev->vblank_enabled[1])
psb_disable_pipestat(dev_priv, 1,
PIPE_VBLANK_INTERRUPT_ENABLE);
if (dev->vblank_enabled[2])
psb_disable_pipestat(dev_priv, 2,
PIPE_VBLANK_INTERRUPT_ENABLE);
}
dev_priv->vdc_irq_mask &= _PSB_IRQ_SGX_FLAG |
_PSB_IRQ_MSVDX_FLAG |
_LNC_IRQ_TOPAZ_FLAG;
}
/*TODO: remove following code*/
if (hw_islands & OSPM_GRAPHICS_ISLAND)
dev_priv->vdc_irq_mask &= ~_PSB_IRQ_SGX_FLAG;
/*These two registers are safe even if display island is off*/
PSB_WVDC32(~dev_priv->vdc_irq_mask, PSB_INT_MASK_R);
PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
wmb();
/*This register is safe even if display island is off*/
PSB_WVDC32(PSB_RVDC32(PSB_INT_IDENTITY_R), PSB_INT_IDENTITY_R);
spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
}
void psb_irq_turn_on_dpst(struct drm_device *dev)
{
struct drm_psb_private *dev_priv =
(struct drm_psb_private *) dev->dev_private;
u32 hist_reg;
u32 pwm_reg;
if (ospm_power_using_hw_begin(OSPM_DISPLAY_ISLAND,
OSPM_UHB_ONLY_IF_ON)) {
PSB_WVDC32(1 << 31, HISTOGRAM_LOGIC_CONTROL);
hist_reg = PSB_RVDC32(HISTOGRAM_LOGIC_CONTROL);
PSB_WVDC32(1 << 31, HISTOGRAM_INT_CONTROL);
hist_reg = PSB_RVDC32(HISTOGRAM_INT_CONTROL);
PSB_WVDC32(0x80010100, PWM_CONTROL_LOGIC);
pwm_reg = PSB_RVDC32(PWM_CONTROL_LOGIC);
PSB_WVDC32(pwm_reg | PWM_PHASEIN_ENABLE
| PWM_PHASEIN_INT_ENABLE,
PWM_CONTROL_LOGIC);
pwm_reg = PSB_RVDC32(PWM_CONTROL_LOGIC);
psb_enable_pipestat(dev_priv, 0, PIPE_DPST_EVENT_ENABLE);
hist_reg = PSB_RVDC32(HISTOGRAM_INT_CONTROL);
PSB_WVDC32(hist_reg | HISTOGRAM_INT_CTRL_CLEAR,
HISTOGRAM_INT_CONTROL);
pwm_reg = PSB_RVDC32(PWM_CONTROL_LOGIC);
PSB_WVDC32(pwm_reg | 0x80010100 | PWM_PHASEIN_ENABLE,
PWM_CONTROL_LOGIC);
ospm_power_using_hw_end(OSPM_DISPLAY_ISLAND);
}
}
int psb_irq_enable_dpst(struct drm_device *dev)
{
struct drm_psb_private *dev_priv =
(struct drm_psb_private *) dev->dev_private;
unsigned long irqflags;
PSB_DEBUG_ENTRY("\n");
spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
/* enable DPST */
mid_enable_pipe_event(dev_priv, 0);
psb_irq_turn_on_dpst(dev);
spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
return 0;
}
void psb_irq_turn_off_dpst(struct drm_device *dev)
{
struct drm_psb_private *dev_priv =
(struct drm_psb_private *) dev->dev_private;
u32 hist_reg;
u32 pwm_reg;
if (ospm_power_using_hw_begin(OSPM_DISPLAY_ISLAND,
OSPM_UHB_ONLY_IF_ON)) {
PSB_WVDC32(0x00000000, HISTOGRAM_INT_CONTROL);
hist_reg = PSB_RVDC32(HISTOGRAM_INT_CONTROL);
psb_disable_pipestat(dev_priv, 0, PIPE_DPST_EVENT_ENABLE);
pwm_reg = PSB_RVDC32(PWM_CONTROL_LOGIC);
PSB_WVDC32(pwm_reg & !(PWM_PHASEIN_INT_ENABLE),
PWM_CONTROL_LOGIC);
pwm_reg = PSB_RVDC32(PWM_CONTROL_LOGIC);
ospm_power_using_hw_end(OSPM_DISPLAY_ISLAND);
}
}
int psb_irq_disable_dpst(struct drm_device *dev)
{
struct drm_psb_private *dev_priv =
(struct drm_psb_private *) dev->dev_private;
unsigned long irqflags;
PSB_DEBUG_ENTRY("\n");
spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
mid_disable_pipe_event(dev_priv, 0);
psb_irq_turn_off_dpst(dev);
spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
return 0;
}
#ifdef PSB_FIXME
static int psb_vblank_do_wait(struct drm_device *dev,
unsigned int *sequence, atomic_t *counter)
{
unsigned int cur_vblank;
int ret = 0;
DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ,
(((cur_vblank = atomic_read(counter))
- *sequence) <= (1 << 23)));
*sequence = cur_vblank;
return ret;
}
#endif
/*
* It is used to enable VBLANK interrupt
*/
int psb_enable_vblank(struct drm_device *dev, int pipe)
{
struct drm_psb_private *dev_priv =
(struct drm_psb_private *) dev->dev_private;
unsigned long irqflags;
uint32_t reg_val = 0;
uint32_t pipeconf_reg = mid_pipeconf(pipe);
PSB_DEBUG_ENTRY("\n");
if (ospm_power_using_hw_begin(OSPM_DISPLAY_ISLAND,
OSPM_UHB_ONLY_IF_ON)) {
reg_val = REG_READ(pipeconf_reg);
ospm_power_using_hw_end(OSPM_DISPLAY_ISLAND);
}
if (!(reg_val & PIPEACONF_ENABLE))
return -EINVAL;
spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
drm_psb_disable_vsync = 0;
mid_enable_pipe_event(dev_priv, pipe);
psb_enable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_ENABLE);
spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
return 0;
}
/*
* It is used to disable VBLANK interrupt
*/
void psb_disable_vblank(struct drm_device *dev, int pipe)
{
struct drm_psb_private *dev_priv =
(struct drm_psb_private *) dev->dev_private;
unsigned long irqflags;
PSB_DEBUG_ENTRY("\n");
spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
drm_psb_disable_vsync = 1;
mid_disable_pipe_event(dev_priv, pipe);
psb_disable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_ENABLE);
spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
}
/* Called from drm generic code, passed a 'crtc', which
* we use as a pipe index
*/
u32 psb_get_vblank_counter(struct drm_device *dev, int pipe)
{
uint32_t high_frame = PIPEAFRAMEHIGH;
uint32_t low_frame = PIPEAFRAMEPIXEL;
uint32_t pipeconf_reg = PIPEACONF;
uint32_t reg_val = 0;
uint32_t high1 = 0, high2 = 0, low = 0, count = 0;
switch (pipe) {
case 0:
break;
case 1:
high_frame = PIPEBFRAMEHIGH;
low_frame = PIPEBFRAMEPIXEL;
pipeconf_reg = PIPEBCONF;
break;
case 2:
high_frame = PIPECFRAMEHIGH;
low_frame = PIPECFRAMEPIXEL;
pipeconf_reg = PIPECCONF;
break;
default:
DRM_ERROR("%s, invalded pipe.\n", __func__);
return 0;
}
if (!ospm_power_using_hw_begin(OSPM_DISPLAY_ISLAND, false))
return 0;
reg_val = REG_READ(pipeconf_reg);
if (!(reg_val & PIPEACONF_ENABLE)) {
DRM_ERROR("trying to get vblank count for disabled pipe %d\n",
pipe);
goto psb_get_vblank_counter_exit;
}
/*
* High & low register fields aren't synchronized, so make sure
* we get a low value that's stable across two reads of the high
* register.
*/
do {
high1 = ((REG_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >>
PIPE_FRAME_HIGH_SHIFT);
low = ((REG_READ(low_frame) & PIPE_FRAME_LOW_MASK) >>
PIPE_FRAME_LOW_SHIFT);
high2 = ((REG_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >>
PIPE_FRAME_HIGH_SHIFT);
} while (high1 != high2);
count = (high1 << 8) | low;
psb_get_vblank_counter_exit:
ospm_power_using_hw_end(OSPM_DISPLAY_ISLAND);
return count;
}