提交 b4c145c1 编写于 作者: B Ben Widawsky 提交者: Daniel Vetter

drm/i915: Find unclaimed MMIO writes.

ERR_INT on HSW will display unclaimed MMIO accesses. This can be either
the result of a driver bug writing to an invalid addresses, or the
result of RC6.
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
Reviewed-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Tested-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: NAntti Koskipaa <antti.koskipaa@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
上级 71e172e8
......@@ -1174,6 +1174,10 @@ void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val) { \
if (unlikely(__fifo_ret)) { \
gen6_gt_check_fifodbg(dev_priv); \
} \
if (IS_HASWELL(dev_priv->dev) && (I915_READ_NOTRACE(GEN7_ERR_INT) & ERR_INT_MMIO_UNCLAIMED)) { \
DRM_ERROR("Unclaimed write to %x\n", reg); \
writel(ERR_INT_MMIO_UNCLAIMED, dev_priv->regs + GEN7_ERR_INT); \
} \
}
__i915_write(8, b)
__i915_write(16, w)
......
......@@ -501,6 +501,7 @@
#define ERROR_GEN6 0x040a0
#define GEN7_ERR_INT 0x44040
#define ERR_INT_MMIO_UNCLAIMED (1<<13)
/* GM45+ chicken bits -- debug workaround bits that may be required
* for various sorts of correct behavior. The top 16 bits of each are
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册