提交 036a4a7d 编写于 作者: Z Zhenyu Wang 提交者: Eric Anholt

drm/i915: handle interrupt on new chipset

Update interrupt handling methods for IGDNG with new registers
for display and graphics interrupt functions. As we won't use
irq-based vblank sync in dri2, so display interrupt on new chip
will be used for hotplug only in future.
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: NEric Anholt <eric@anholt.net>
上级 d7658989
master alk-4.19.24 alk-4.19.30 alk-4.19.34 alk-4.19.36 alk-4.19.43 alk-4.19.48 alk-4.19.57 ck-4.19.67 ck-4.19.81 ck-4.19.91 github/fork/deepanshu1422/fix-typo-in-comment github/fork/haosdent/fix-typo linux-next v4.19.91 v4.19.90 v4.19.89 v4.19.88 v4.19.87 v4.19.86 v4.19.85 v4.19.84 v4.19.83 v4.19.82 v4.19.81 v4.19.80 v4.19.79 v4.19.78 v4.19.77 v4.19.76 v4.19.75 v4.19.74 v4.19.73 v4.19.72 v4.19.71 v4.19.70 v4.19.69 v4.19.68 v4.19.67 v4.19.66 v4.19.65 v4.19.64 v4.19.63 v4.19.62 v4.19.61 v4.19.60 v4.19.59 v4.19.58 v4.19.57 v4.19.56 v4.19.55 v4.19.54 v4.19.53 v4.19.52 v4.19.51 v4.19.50 v4.19.49 v4.19.48 v4.19.47 v4.19.46 v4.19.45 v4.19.44 v4.19.43 v4.19.42 v4.19.41 v4.19.40 v4.19.39 v4.19.38 v4.19.37 v4.19.36 v4.19.35 v4.19.34 v4.19.33 v4.19.32 v4.19.31 v4.19.30 v4.19.29 v4.19.28 v4.19.27 v4.19.26 v4.19.25 v4.19.24 v4.19.23 v4.19.22 v4.19.21 v4.19.20 v4.19.19 v4.19.18 v4.19.17 v4.19.16 v4.19.15 v4.19.14 v4.19.13 v4.19.12 v4.19.11 v4.19.10 v4.19.9 v4.19.8 v4.19.7 v4.19.6 v4.19.5 v4.19.4 v4.19.3 v4.19.2 v4.19.1 v4.19 v4.19-rc8 v4.19-rc7 v4.19-rc6 v4.19-rc5 v4.19-rc4 v4.19-rc3 v4.19-rc2 v4.19-rc1 ck-release-21 ck-release-20 ck-release-19.2 ck-release-19.1 ck-release-19 ck-release-18 ck-release-17.2 ck-release-17.1 ck-release-17 ck-release-16 ck-release-15.1 ck-release-15 ck-release-14 ck-release-13.2 ck-release-13 ck-release-12 ck-release-11 ck-release-10 ck-release-9 ck-release-7 alk-release-15 alk-release-14 alk-release-13.2 alk-release-13 alk-release-12 alk-release-11 alk-release-10 alk-release-9 alk-release-7
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......@@ -1162,7 +1162,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
dev->driver->get_vblank_counter = i915_get_vblank_counter;
dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
if (IS_G4X(dev)) {
if (IS_G4X(dev) || IS_IGDNG(dev)) {
dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
dev->driver->get_vblank_counter = gm45_get_vblank_counter;
}
......
......@@ -167,6 +167,11 @@ typedef struct drm_i915_private {
/** Cached value of IMR to avoid reads in updating the bitfield */
u32 irq_mask_reg;
u32 pipestat[2];
/** splitted irq regs for graphics and display engine on IGDNG,
irq_mask_reg is still used for display irq. */
u32 gt_irq_mask_reg;
u32 gt_irq_enable_reg;
u32 de_irq_enable_reg;
u32 hotplug_supported_mask;
struct work_struct hotplug_work;
......
......@@ -1714,7 +1714,10 @@ i915_wait_request(struct drm_device *dev, uint32_t seqno)
BUG_ON(seqno == 0);
if (!i915_seqno_passed(i915_get_gem_seqno(dev), seqno)) {
ier = I915_READ(IER);
if (IS_IGDNG(dev))
ier = I915_READ(DEIER) | I915_READ(GTIER);
else
ier = I915_READ(IER);
if (!ier) {
DRM_ERROR("something (likely vbetool) disabled "
"interrupts, re-enabling\n");
......
......@@ -57,6 +57,47 @@
#define DRM_I915_VBLANK_PIPE_ALL (DRM_I915_VBLANK_PIPE_A | \
DRM_I915_VBLANK_PIPE_B)
void
igdng_enable_graphics_irq(drm_i915_private_t *dev_priv, u32 mask)
{
if ((dev_priv->gt_irq_mask_reg & mask) != 0) {
dev_priv->gt_irq_mask_reg &= ~mask;
I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg);
(void) I915_READ(GTIMR);
}
}
static inline void
igdng_disable_graphics_irq(drm_i915_private_t *dev_priv, u32 mask)
{
if ((dev_priv->gt_irq_mask_reg & mask) != mask) {
dev_priv->gt_irq_mask_reg |= mask;
I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg);
(void) I915_READ(GTIMR);
}
}
/* For display hotplug interrupt */
void
igdng_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
{
if ((dev_priv->irq_mask_reg & mask) != 0) {
dev_priv->irq_mask_reg &= ~mask;
I915_WRITE(DEIMR, dev_priv->irq_mask_reg);
(void) I915_READ(DEIMR);
}
}
static inline void
igdng_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
{
if ((dev_priv->irq_mask_reg & mask) != mask) {
dev_priv->irq_mask_reg |= mask;
I915_WRITE(DEIMR, dev_priv->irq_mask_reg);
(void) I915_READ(DEIMR);
}
}
void
i915_enable_irq(drm_i915_private_t *dev_priv, u32 mask)
{
......@@ -196,6 +237,47 @@ static void i915_hotplug_work_func(struct work_struct *work)
drm_sysfs_hotplug_event(dev);
}
irqreturn_t igdng_irq_handler(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int ret = IRQ_NONE;
u32 de_iir, gt_iir;
u32 new_de_iir, new_gt_iir;
struct drm_i915_master_private *master_priv;
de_iir = I915_READ(DEIIR);
gt_iir = I915_READ(GTIIR);
for (;;) {
if (de_iir == 0 && gt_iir == 0)
break;
ret = IRQ_HANDLED;
I915_WRITE(DEIIR, de_iir);
new_de_iir = I915_READ(DEIIR);
I915_WRITE(GTIIR, gt_iir);
new_gt_iir = I915_READ(GTIIR);
if (dev->primary->master) {
master_priv = dev->primary->master->driver_priv;
if (master_priv->sarea_priv)
master_priv->sarea_priv->last_dispatch =
READ_BREADCRUMB(dev_priv);
}
if (gt_iir & GT_USER_INTERRUPT) {
dev_priv->mm.irq_gem_seqno = i915_get_gem_seqno(dev);
DRM_WAKEUP(&dev_priv->irq_queue);
}
de_iir = new_de_iir;
gt_iir = new_gt_iir;
}
return ret;
}
irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
{
struct drm_device *dev = (struct drm_device *) arg;
......@@ -212,6 +294,9 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
atomic_inc(&dev_priv->irq_received);
if (IS_IGDNG(dev))
return igdng_irq_handler(dev);
iir = I915_READ(IIR);
if (IS_I965G(dev)) {
......@@ -349,8 +434,12 @@ void i915_user_irq_get(struct drm_device *dev)
unsigned long irqflags;
spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
if (dev->irq_enabled && (++dev_priv->user_irq_refcount == 1))
i915_enable_irq(dev_priv, I915_USER_INTERRUPT);
if (dev->irq_enabled && (++dev_priv->user_irq_refcount == 1)) {
if (IS_IGDNG(dev))
igdng_enable_graphics_irq(dev_priv, GT_USER_INTERRUPT);
else
i915_enable_irq(dev_priv, I915_USER_INTERRUPT);
}
spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
}
......@@ -361,8 +450,12 @@ void i915_user_irq_put(struct drm_device *dev)
spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
BUG_ON(dev->irq_enabled && dev_priv->user_irq_refcount <= 0);
if (dev->irq_enabled && (--dev_priv->user_irq_refcount == 0))
i915_disable_irq(dev_priv, I915_USER_INTERRUPT);
if (dev->irq_enabled && (--dev_priv->user_irq_refcount == 0)) {
if (IS_IGDNG(dev))
igdng_disable_graphics_irq(dev_priv, GT_USER_INTERRUPT);
else
i915_disable_irq(dev_priv, I915_USER_INTERRUPT);
}
spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
}
......@@ -455,6 +548,9 @@ int i915_enable_vblank(struct drm_device *dev, int pipe)
if (!(pipeconf & PIPEACONF_ENABLE))
return -EINVAL;
if (IS_IGDNG(dev))
return 0;
spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
if (IS_I965G(dev))
i915_enable_pipestat(dev_priv, pipe,
......@@ -474,6 +570,9 @@ void i915_disable_vblank(struct drm_device *dev, int pipe)
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags;
if (IS_IGDNG(dev))
return;
spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
i915_disable_pipestat(dev_priv, pipe,
PIPE_VBLANK_INTERRUPT_ENABLE |
......@@ -547,12 +646,65 @@ int i915_vblank_swap(struct drm_device *dev, void *data,
/* drm_dma.h hooks
*/
static void igdng_irq_preinstall(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
I915_WRITE(HWSTAM, 0xeffe);
/* XXX hotplug from PCH */
I915_WRITE(DEIMR, 0xffffffff);
I915_WRITE(DEIER, 0x0);
(void) I915_READ(DEIER);
/* and GT */
I915_WRITE(GTIMR, 0xffffffff);
I915_WRITE(GTIER, 0x0);
(void) I915_READ(GTIER);
}
static int igdng_irq_postinstall(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
/* enable kind of interrupts always enabled */
u32 display_mask = DE_MASTER_IRQ_CONTROL /*| DE_PCH_EVENT */;
u32 render_mask = GT_USER_INTERRUPT;
dev_priv->irq_mask_reg = ~display_mask;
dev_priv->de_irq_enable_reg = display_mask;
/* should always can generate irq */
I915_WRITE(DEIIR, I915_READ(DEIIR));
I915_WRITE(DEIMR, dev_priv->irq_mask_reg);
I915_WRITE(DEIER, dev_priv->de_irq_enable_reg);
(void) I915_READ(DEIER);
/* user interrupt should be enabled, but masked initial */
dev_priv->gt_irq_mask_reg = 0xffffffff;
dev_priv->gt_irq_enable_reg = render_mask;
I915_WRITE(GTIIR, I915_READ(GTIIR));
I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg);
I915_WRITE(GTIER, dev_priv->gt_irq_enable_reg);
(void) I915_READ(GTIER);
return 0;
}
void i915_driver_irq_preinstall(struct drm_device * dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
atomic_set(&dev_priv->irq_received, 0);
INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
if (IS_IGDNG(dev)) {
igdng_irq_preinstall(dev);
return;
}
if (I915_HAS_HOTPLUG(dev)) {
I915_WRITE(PORT_HOTPLUG_EN, 0);
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
......@@ -564,7 +716,6 @@ void i915_driver_irq_preinstall(struct drm_device * dev)
I915_WRITE(IMR, 0xffffffff);
I915_WRITE(IER, 0x0);
(void) I915_READ(IER);
INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
}
int i915_driver_irq_postinstall(struct drm_device *dev)
......@@ -572,8 +723,13 @@ int i915_driver_irq_postinstall(struct drm_device *dev)
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR;
DRM_INIT_WAITQUEUE(&dev_priv->irq_queue);
dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
if (IS_IGDNG(dev))
return igdng_irq_postinstall(dev);
/* Unmask the interrupts that we always want on. */
dev_priv->irq_mask_reg = ~I915_INTERRUPT_ENABLE_FIX;
......@@ -613,11 +769,24 @@ int i915_driver_irq_postinstall(struct drm_device *dev)
(void) I915_READ(IER);
opregion_enable_asle(dev);
DRM_INIT_WAITQUEUE(&dev_priv->irq_queue);
return 0;
}
static void igdng_irq_uninstall(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
I915_WRITE(HWSTAM, 0xffffffff);
I915_WRITE(DEIMR, 0xffffffff);
I915_WRITE(DEIER, 0x0);
I915_WRITE(DEIIR, I915_READ(DEIIR));
I915_WRITE(GTIMR, 0xffffffff);
I915_WRITE(GTIER, 0x0);
I915_WRITE(GTIIR, I915_READ(GTIIR));
}
void i915_driver_irq_uninstall(struct drm_device * dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
......@@ -627,6 +796,11 @@ void i915_driver_irq_uninstall(struct drm_device * dev)
dev_priv->vblank_pipe = 0;
if (IS_IGDNG(dev)) {
igdng_irq_uninstall(dev);
return;
}
if (I915_HAS_HOTPLUG(dev)) {
I915_WRITE(PORT_HOTPLUG_EN, 0);
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
......
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