Hello Eugeni Dodonov,
The patch a416edefbbaf: "drm/i915: add support for SBI ops" from May
9, 2012, leads to the following warning:
drivers/gpu/drm/i915/intel_display.c:1347 intel_sbi_write()
warn: bitwise AND condition is false here
SBI_READY is defined like this:
#define SBI_READY (0x0<<0)
1346 spin_lock_irqsave(&dev_priv->dpio_lock, flags);
1347 if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_READY) == 0,
if ((x & 0) == 0) { ...
This is always true, so this condition will never timeout.
1348 100)) {
1349 DRM_ERROR("timeout waiting for SBI to become ready\n");
1350 goto out_unlock;
1351 }
All the places that use SBI_READY are like this:
drivers/gpu/drm/i915/intel_display.c:1347 intel_sbi_write() warn: bitwise AND condition is false here
drivers/gpu/drm/i915/intel_display.c:1361 intel_sbi_write() warn: bitwise AND condition is false here
drivers/gpu/drm/i915/intel_display.c:1378 intel_sbi_read() warn: bitwise AND condition is false here
drivers/gpu/drm/i915/intel_display.c:1390 intel_sbi_read() warn: bitwise AND condition is false here
regards,
dan carpenter
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