// SPDX-License-Identifier: GPL-2.0-only
/**************************************************************************
* Copyright ( c ) 2007 , Intel Corporation .
* All Rights Reserved .
*
* Intel funded Tungsten Graphics ( http : //www.tungstengraphics.com) to
* develop this driver .
*
**************************************************************************/
#include <drm/drm_drv.h>
#include <drm/drm_vblank.h>
#include "power.h"
#include "psb_drv.h"
#include "psb_intel_reg.h"
#include "psb_irq.h"
#include "psb_reg.h"
/*
* inline functions
*/
static inline u32 gma_pipestat(int pipe)
{
if (pipe == 0 )
return PIPEASTAT;
if (pipe == 1 )
return PIPEBSTAT;
if (pipe == 2 )
return PIPECSTAT;
BUG();
}
static inline u32 gma_pipeconf(int pipe)
{
if (pipe == 0 )
return PIPEACONF;
if (pipe == 1 )
return PIPEBCONF;
if (pipe == 2 )
return PIPECCONF;
BUG();
}
void gma_enable_pipestat(struct drm_psb_private *dev_priv, int pipe, u32 mask)
{
if ((dev_priv->pipestat[pipe] & mask) != mask) {
u32 reg = gma_pipestat(pipe);
dev_priv->pipestat[pipe] |= mask;
/* Enable the interrupt, clear any pending status */
if (gma_power_begin(&dev_priv->dev, false )) {
u32 writeVal = PSB_RVDC32(reg);
writeVal |= (mask | (mask >> 16 ));
PSB_WVDC32(writeVal, reg);
(void ) PSB_RVDC32(reg);
gma_power_end(&dev_priv->dev);
}
}
}
void gma_disable_pipestat(struct drm_psb_private *dev_priv, int pipe, u32 mask)
{
if ((dev_priv->pipestat[pipe] & mask) != 0 ) {
u32 reg = gma_pipestat(pipe);
dev_priv->pipestat[pipe] &= ~mask;
if (gma_power_begin(&dev_priv->dev, false )) {
u32 writeVal = PSB_RVDC32(reg);
writeVal &= ~mask;
PSB_WVDC32(writeVal, reg);
(void ) PSB_RVDC32(reg);
gma_power_end(&dev_priv->dev);
}
}
}
/*
* Display controller interrupt handler for pipe event .
*/
static void gma_pipe_event_handler(struct drm_device *dev, int pipe)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
uint32_t pipe_stat_val = 0 ;
uint32_t pipe_stat_reg = gma_pipestat(pipe);
uint32_t pipe_enable = dev_priv->pipestat[pipe];
uint32_t pipe_status = dev_priv->pipestat[pipe] >> 16 ;
uint32_t pipe_clear;
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
* Sometimes the bits are very sticky so we repeat until they unstick */
for (i = 0 ; i < 0 xffff; i++) {
PSB_WVDC32(PSB_RVDC32(pipe_stat_reg), pipe_stat_reg);
pipe_clear = PSB_RVDC32(pipe_stat_reg) & pipe_status;
if (pipe_clear == 0 )
break ;
}
if (pipe_clear)
dev_err(dev->dev,
"%s, can't clear status bits for pipe %d, its value = 0x%x.\n" ,
__func__, pipe, PSB_RVDC32(pipe_stat_reg));
if (pipe_stat_val & PIPE_VBLANK_STATUS) {
struct drm_crtc *crtc = drm_crtc_from_index(dev, pipe);
struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
unsigned long flags;
drm_handle_vblank(dev, pipe);
spin_lock_irqsave(&dev->event_lock, flags);
if (gma_crtc->page_flip_event) {
drm_crtc_send_vblank_event(crtc,
gma_crtc->page_flip_event);
gma_crtc->page_flip_event = NULL;
drm_crtc_vblank_put(crtc);
}
spin_unlock_irqrestore(&dev->event_lock, flags);
}
}
/*
* Display controller interrupt handler .
*/
static void gma_vdc_interrupt(struct drm_device *dev, uint32_t vdc_stat)
{
if (vdc_stat & _PSB_IRQ_ASLE)
psb_intel_opregion_asle_intr(dev);
if (vdc_stat & _PSB_VSYNC_PIPEA_FLAG)
gma_pipe_event_handler(dev, 0 );
if (vdc_stat & _PSB_VSYNC_PIPEB_FLAG)
gma_pipe_event_handler(dev, 1 );
}
/*
* SGX interrupt handler
*/
static void gma_sgx_interrupt(struct drm_device *dev, u32 stat_1, u32 stat_2)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
u32 val, addr;
if (stat_1 & _PSB_CE_TWOD_COMPLETE)
val = PSB_RSGX32(PSB_CR_2D_BLIT_STATUS);
if (stat_2 & _PSB_CE2_BIF_REQUESTER_FAULT) {
val = PSB_RSGX32(PSB_CR_BIF_INT_STAT);
addr = PSB_RSGX32(PSB_CR_BIF_FAULT);
if (val) {
if (val & _PSB_CBI_STAT_PF_N_RW)
DRM_ERROR("SGX MMU page fault:" );
else
DRM_ERROR("SGX MMU read / write protection fault:" );
if (val & _PSB_CBI_STAT_FAULT_CACHE)
DRM_ERROR("\tCache requestor" );
if (val & _PSB_CBI_STAT_FAULT_TA)
DRM_ERROR("\tTA requestor" );
if (val & _PSB_CBI_STAT_FAULT_VDM)
DRM_ERROR("\tVDM requestor" );
if (val & _PSB_CBI_STAT_FAULT_2D)
DRM_ERROR("\t2D requestor" );
if (val & _PSB_CBI_STAT_FAULT_PBE)
DRM_ERROR("\tPBE requestor" );
if (val & _PSB_CBI_STAT_FAULT_TSP)
DRM_ERROR("\tTSP requestor" );
if (val & _PSB_CBI_STAT_FAULT_ISP)
DRM_ERROR("\tISP requestor" );
if (val & _PSB_CBI_STAT_FAULT_USSEPDS)
DRM_ERROR("\tUSSEPDS requestor" );
if (val & _PSB_CBI_STAT_FAULT_HOST)
DRM_ERROR("\tHost requestor" );
DRM_ERROR("\tMMU failing address is 0x%08x.\n" ,
(unsigned int )addr);
}
}
/* Clear bits */
PSB_WSGX32(stat_1, PSB_CR_EVENT_HOST_CLEAR);
PSB_WSGX32(stat_2, PSB_CR_EVENT_HOST_CLEAR2);
PSB_RSGX32(PSB_CR_EVENT_HOST_CLEAR2);
}
static irqreturn_t gma_irq_handler(int irq, void *arg)
{
struct drm_device *dev = arg;
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
uint32_t vdc_stat, dsp_int = 0 , sgx_int = 0 , hotplug_int = 0 ;
u32 sgx_stat_1, sgx_stat_2;
int handled = 0 ;
spin_lock(&dev_priv->irqmask_lock);
vdc_stat = PSB_RVDC32(PSB_INT_IDENTITY_R);
if (vdc_stat & (_PSB_PIPE_EVENT_FLAG|_PSB_IRQ_ASLE))
dsp_int = 1 ;
if (vdc_stat & _PSB_IRQ_SGX_FLAG)
sgx_int = 1 ;
if (vdc_stat & _PSB_IRQ_DISP_HOTSYNC)
hotplug_int = 1 ;
vdc_stat &= dev_priv->vdc_irq_mask;
spin_unlock(&dev_priv->irqmask_lock);
if (dsp_int) {
gma_vdc_interrupt(dev, vdc_stat);
handled = 1 ;
}
if (sgx_int) {
sgx_stat_1 = PSB_RSGX32(PSB_CR_EVENT_STATUS);
sgx_stat_2 = PSB_RSGX32(PSB_CR_EVENT_STATUS2);
gma_sgx_interrupt(dev, sgx_stat_1, sgx_stat_2);
handled = 1 ;
}
/* Note: this bit has other meanings on some devices, so we will
need to address that later if it ever matters */
if (hotplug_int && dev_priv->ops->hotplug) {
handled = dev_priv->ops->hotplug(dev);
REG_WRITE(PORT_HOTPLUG_STAT, REG_READ(PORT_HOTPLUG_STAT));
}
PSB_WVDC32(vdc_stat, PSB_INT_IDENTITY_R);
(void ) PSB_RVDC32(PSB_INT_IDENTITY_R);
rmb();
if (!handled)
return IRQ_NONE;
return IRQ_HANDLED;
}
void gma_irq_preinstall(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
unsigned long irqflags;
spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
PSB_WVDC32(0 xFFFFFFFF, PSB_HWSTAM);
PSB_WVDC32(0 x00000000, PSB_INT_MASK_R);
PSB_WVDC32(0 x00000000, PSB_INT_ENABLE_R);
PSB_WSGX32(0 x00000000, PSB_CR_EVENT_HOST_ENABLE);
PSB_RSGX32(PSB_CR_EVENT_HOST_ENABLE);
if (dev->vblank[0 ].enabled)
dev_priv->vdc_irq_mask |= _PSB_VSYNC_PIPEA_FLAG;
if (dev->vblank[1 ].enabled)
dev_priv->vdc_irq_mask |= _PSB_VSYNC_PIPEB_FLAG;
/* Revisit this area - want per device masks ? */
if (dev_priv->ops->hotplug)
dev_priv->vdc_irq_mask |= _PSB_IRQ_DISP_HOTSYNC;
dev_priv->vdc_irq_mask |= _PSB_IRQ_ASLE | _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);
}
void gma_irq_postinstall(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
unsigned long irqflags;
unsigned int i;
spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
/* Enable 2D and MMU fault interrupts */
PSB_WSGX32(_PSB_CE2_BIF_REQUESTER_FAULT, PSB_CR_EVENT_HOST_ENABLE2);
PSB_WSGX32(_PSB_CE_TWOD_COMPLETE, PSB_CR_EVENT_HOST_ENABLE);
PSB_RSGX32(PSB_CR_EVENT_HOST_ENABLE); /* Post */
/* This register is safe even if display island is off */
PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
PSB_WVDC32(0 xFFFFFFFF, PSB_HWSTAM);
for (i = 0 ; i < dev->num_crtcs; ++i) {
if (dev->vblank[i].enabled)
gma_enable_pipestat(dev_priv, i, PIPE_VBLANK_INTERRUPT_ENABLE);
else
gma_disable_pipestat(dev_priv, i, PIPE_VBLANK_INTERRUPT_ENABLE);
}
if (dev_priv->ops->hotplug_enable)
dev_priv->ops->hotplug_enable(dev, true );
spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
}
int gma_irq_install(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
struct pci_dev *pdev = to_pci_dev(dev->dev);
int ret;
if (dev_priv->use_msi && pci_enable_msi(pdev)) {
dev_warn(dev->dev, "Enabling MSI failed!\n" );
dev_priv->use_msi = false ;
}
if (pdev->irq == IRQ_NOTCONNECTED)
return -ENOTCONN;
gma_irq_preinstall(dev);
/* PCI devices require shared interrupts. */
ret = request_irq(pdev->irq, gma_irq_handler, IRQF_SHARED, dev->driver->name, dev);
if (ret)
return ret;
gma_irq_postinstall(dev);
dev_priv->irq_enabled = true ;
return 0 ;
}
void gma_irq_uninstall(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
struct pci_dev *pdev = to_pci_dev(dev->dev);
unsigned long irqflags;
unsigned int i;
if (!dev_priv->irq_enabled)
return ;
spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
if (dev_priv->ops->hotplug_enable)
dev_priv->ops->hotplug_enable(dev, false );
PSB_WVDC32(0 xFFFFFFFF, PSB_HWSTAM);
for (i = 0 ; i < dev->num_crtcs; ++i) {
if (dev->vblank[i].enabled)
gma_disable_pipestat(dev_priv, i, PIPE_VBLANK_INTERRUPT_ENABLE);
}
dev_priv->vdc_irq_mask &= _PSB_IRQ_SGX_FLAG |
_PSB_IRQ_MSVDX_FLAG |
_LNC_IRQ_TOPAZ_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);
free_irq(pdev->irq, dev);
if (dev_priv->use_msi)
pci_disable_msi(pdev);
}
int gma_crtc_enable_vblank(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
unsigned int pipe = crtc->index;
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
unsigned long irqflags;
uint32_t reg_val = 0 ;
uint32_t pipeconf_reg = gma_pipeconf(pipe);
if (gma_power_begin(dev, false )) {
reg_val = REG_READ(pipeconf_reg);
gma_power_end(dev);
}
if (!(reg_val & PIPEACONF_ENABLE))
return -EINVAL;
spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
if (pipe == 0 )
dev_priv->vdc_irq_mask |= _PSB_VSYNC_PIPEA_FLAG;
else if (pipe == 1 )
dev_priv->vdc_irq_mask |= _PSB_VSYNC_PIPEB_FLAG;
PSB_WVDC32(~dev_priv->vdc_irq_mask, PSB_INT_MASK_R);
PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
gma_enable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_ENABLE);
spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
return 0 ;
}
void gma_crtc_disable_vblank(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
unsigned int pipe = crtc->index;
struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
unsigned long irqflags;
spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
if (pipe == 0 )
dev_priv->vdc_irq_mask &= ~_PSB_VSYNC_PIPEA_FLAG;
else if (pipe == 1 )
dev_priv->vdc_irq_mask &= ~_PSB_VSYNC_PIPEB_FLAG;
PSB_WVDC32(~dev_priv->vdc_irq_mask, PSB_INT_MASK_R);
PSB_WVDC32(dev_priv->vdc_irq_mask, PSB_INT_ENABLE_R);
gma_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 gma_crtc_get_vblank_counter(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
unsigned int pipe = crtc->index;
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 :
dev_err(dev->dev, "%s, invalid pipe.\n" , __func__);
return 0 ;
}
if (!gma_power_begin(dev, false ))
return 0 ;
reg_val = REG_READ(pipeconf_reg);
if (!(reg_val & PIPEACONF_ENABLE)) {
dev_err(dev->dev, "trying to get vblank count for disabled pipe %u\n" ,
pipe);
goto err_gma_power_end;
}
/*
* 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;
err_gma_power_end:
gma_power_end(dev);
return count;
}
Messung V0.5 in Prozent C=92 H=94 G=92
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-09-29)
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