[Intel-gfx] [PATCH] drm/i915: Clarify error message on failed workaround

[Matt Roper]

Let's modify the "workaround lost" error message slightly to make it
more clear what the various numbers represent.  Also, the 'expected'
value needs to be &'d with wa->read so that it doesn't include the mask
bits for masked registers (those bits are write-only in the hardware and
will usually always read out as 0's).

Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
---
 drivers/gpu/drm/i915/gt/intel_workarounds.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 42d320e68b60..b0e3a5ba0320 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -1383,9 +1383,9 @@ static bool
 wa_verify(const struct i915_wa *wa, u32 cur, const char *name, const char *from)
 {
 	if ((cur ^ wa->set) & wa->read) {
-		DRM_ERROR("%s workaround lost on %s! (%x=%x/%x, expected %x)\n",
+		DRM_ERROR("%s workaround lost on %s! (reg[%x]=0x%x, relevant bits were 0x%x vs expected 0x%x)\n",
 			  name, from, i915_mmio_reg_offset(wa->reg),
-			  cur, cur & wa->read, wa->set);
+			  cur, cur & wa->read, wa->set & wa->read);
 
 		return false;
 	}
-- 
2.24.1