From: Eugeni Dodonov <eugeni.dodonov@intel.com>
To: intel-gfx@lists.freedesktop.org
Cc: Eugeni Dodonov <eugeni.dodonov@intel.com>
Subject: [PATCH 1/1] drm/i915: properly wait for SBI status
Date: Fri, 8 Jun 2012 16:38:09 -0300 [thread overview]
Message-ID: <1339184289-31337-1-git-send-email-eugeni.dodonov@intel.com> (raw)
In-Reply-To: <20120608143000.GA8088@elgon.mountain>
Somehow this went unnoticed in the past reviews, but the condition would
never timeout properly.
This was initially introduced in the v2 of original SBI enabling patch.
Highly embarrassing.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index ebea71d..c59af67 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1344,7 +1344,7 @@ intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value)
unsigned long flags;
spin_lock_irqsave(&dev_priv->dpio_lock, flags);
- if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_READY) == 0,
+ if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
100)) {
DRM_ERROR("timeout waiting for SBI to become ready\n");
goto out_unlock;
@@ -1358,7 +1358,7 @@ intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value)
SBI_BUSY |
SBI_CTL_OP_CRWR);
- if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_READY | SBI_RESPONSE_SUCCESS)) == 0,
+ if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
100)) {
DRM_ERROR("timeout waiting for SBI to complete write transaction\n");
goto out_unlock;
@@ -1375,7 +1375,7 @@ intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg)
u32 value;
spin_lock_irqsave(&dev_priv->dpio_lock, flags);
- if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_READY) == 0,
+ if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
100)) {
DRM_ERROR("timeout waiting for SBI to become ready\n");
goto out_unlock;
@@ -1387,7 +1387,7 @@ intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg)
SBI_BUSY |
SBI_CTL_OP_CRRD);
- if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_READY | SBI_RESPONSE_SUCCESS)) == 0,
+ if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
100)) {
DRM_ERROR("timeout waiting for SBI to complete read transaction\n");
goto out_unlock;
--
1.7.10.4
next parent reply other threads:[~2012-06-08 19:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20120608143000.GA8088@elgon.mountain>
2012-06-08 19:38 ` Eugeni Dodonov [this message]
2012-06-08 19:43 ` [PATCH 1/1] drm/i915: properly wait for SBI status Eugeni Dodonov
2012-06-08 20:38 ` Daniel Vetter
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