@@ -704,7 +704,7 @@ static irqreturn_t ivybridge_irq_handler(int irq, void *arg)
{
struct drm_device *dev = (struct drm_device *) arg;
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
- u32 de_iir, gt_iir, de_ier, pm_iir, sde_ier;
+ u32 de_iir, gt_iir, de_ier, pm_iir, sde_ier = 0;
irqreturn_t ret = IRQ_NONE;
int i;
@@ -719,9 +719,11 @@ static irqreturn_t ivybridge_irq_handler(int irq, void *arg)
* able to process them after we restore SDEIER (as soon as we restore
* it, we'll get an interrupt if SDEIIR still has something to process
* due to its back queue). */
- sde_ier = I915_READ(SDEIER);
- I915_WRITE(SDEIER, 0);
- POSTING_READ(SDEIER);
+ if (!HAS_PCH_NOP(dev)) {
+ sde_ier = I915_READ(SDEIER);
+ I915_WRITE(SDEIER, 0);
+ POSTING_READ(SDEIER);
+ }
gt_iir = I915_READ(GTIIR);
if (gt_iir) {
@@ -748,7 +750,7 @@ static irqreturn_t ivybridge_irq_handler(int irq, void *arg)
}
/* check event from PCH */
- if (de_iir & DE_PCH_EVENT_IVB) {
+ if (!HAS_PCH_NOP(dev) && (de_iir & DE_PCH_EVENT_IVB)) {
u32 pch_iir = I915_READ(SDEIIR);
cpt_irq_handler(dev, pch_iir);
@@ -771,8 +773,10 @@ static irqreturn_t ivybridge_irq_handler(int irq, void *arg)
I915_WRITE(DEIER, de_ier);
POSTING_READ(DEIER);
- I915_WRITE(SDEIER, sde_ier);
- POSTING_READ(SDEIER);
+ if (!HAS_PCH_NOP(dev)) {
+ I915_WRITE(SDEIER, sde_ier);
+ POSTING_READ(SDEIER);
+ }
return ret;
}
@@ -1972,6 +1976,9 @@ static void ironlake_irq_preinstall(struct drm_device *dev)
I915_WRITE(GTIER, 0x0);
POSTING_READ(GTIER);
+ if (HAS_PCH_NOP(dev))
+ return;
+
/* south display irq */
I915_WRITE(SDEIMR, 0xffffffff);
I915_WRITE(SDEIER, 0x0);
@@ -2044,6 +2051,9 @@ static void ibx_irq_postinstall(struct drm_device *dev)
SDE_GMBUS_CPT |
SDE_AUX_MASK_CPT;
+ if (HAS_PCH_NOP(dev))
+ return;
+
I915_WRITE(SDEIIR, I915_READ(SDEIIR));
I915_WRITE(SDEIMR, ~mask);
I915_WRITE(SDEIER, mask);
@@ -692,6 +692,9 @@ intel_parse_bios(struct drm_device *dev)
struct bdb_header *bdb = NULL;
u8 __iomem *bios = NULL;
+ if (HAS_PCH_NOP(dev))
+ return -ENODEV;
+
init_vbt_defaults(dev_priv);
/* XXX Should this validation be moved to intel_opregion.c? */
@@ -522,7 +522,9 @@ int intel_setup_gmbus(struct drm_device *dev)
struct drm_i915_private *dev_priv = dev->dev_private;
int ret, i;
- if (HAS_PCH_SPLIT(dev))
+ if (HAS_PCH_NOP(dev))
+ return 0;
+ else if (HAS_PCH_SPLIT(dev))
dev_priv->gpio_mmio_base = PCH_GPIOA - GPIOA;
else if (IS_VALLEYVIEW(dev))
dev_priv->gpio_mmio_base = VLV_DISPLAY_BASE;
@@ -3874,7 +3874,8 @@ static void ivybridge_init_clock_gating(struct drm_device *dev)
snpcr |= GEN6_MBC_SNPCR_MED;
I915_WRITE(GEN6_MBCUNIT_SNPCR, snpcr);
- cpt_init_clock_gating(dev);
+ if (!HAS_PCH_NOP(dev))
+ cpt_init_clock_gating(dev);
gen6_check_mch_setup(dev);
}
Interrupts, clock gating, LVDS, and GMBUS are all within the, "this will be bad for CPU" range when we have PCH_NOP. There is a bit of a hack in init clock gating. We want to do most of the clock gating, but the part we skip will hang the system. It could probably be abstracted a bit better, but I don't feel it's too unsightly. v2: Use inverse HAS_PCH_NOP check (Jani) v3: Actually do what I claimed in v2 (spotted by Daniel) Merge Ivybridge IRQ handler PCH check to decrease whitespace (Daniel) Move LVDS bail into this patch (Ben) v4: logical rebase conflict resolution with SDEIIR (Ben) Signed-off-by: Ben Widawsky <ben@bwidawsk.net> --- drivers/gpu/drm/i915/i915_irq.c | 24 +++++++++++++++++------- drivers/gpu/drm/i915/intel_bios.c | 3 +++ drivers/gpu/drm/i915/intel_i2c.c | 4 +++- drivers/gpu/drm/i915/intel_pm.c | 3 ++- 4 files changed, 25 insertions(+), 9 deletions(-)