[Intel-gfx] [PATCH 06/15] drm/i915: there's no DSPSIZE register on gen4+

[Paulo Zanoni]

From: Paulo Zanoni <paulo.r.zanoni at intel.com>

So don't read it when capturing the error state. This solves some
"unclaimed register" messages on Haswell when we hang the GPU.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
---
 drivers/gpu/drm/i915/intel_display.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 789a95a..56cca6e 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9348,7 +9348,8 @@ intel_display_capture_error_state(struct drm_device *dev)
 
 		error->plane[i].control = I915_READ(DSPCNTR(i));
 		error->plane[i].stride = I915_READ(DSPSTRIDE(i));
-		error->plane[i].size = I915_READ(DSPSIZE(i));
+		if (INTEL_INFO(dev)->gen <= 3)
+			error->plane[i].size = I915_READ(DSPSIZE(i));
 		error->plane[i].pos = I915_READ(DSPPOS(i));
 		error->plane[i].addr = I915_READ(DSPADDR(i));
 		if (INTEL_INFO(dev)->gen >= 4) {
@@ -9392,7 +9393,8 @@ intel_display_print_error_state(struct seq_file *m,
 		seq_printf(m, "Plane [%d]:\n", i);
 		seq_printf(m, "  CNTR: %08x\n", error->plane[i].control);
 		seq_printf(m, "  STRIDE: %08x\n", error->plane[i].stride);
-		seq_printf(m, "  SIZE: %08x\n", error->plane[i].size);
+		if (INTEL_INFO(dev)->gen <= 3)
+			seq_printf(m, "  SIZE: %08x\n", error->plane[i].size);
 		seq_printf(m, "  POS: %08x\n", error->plane[i].pos);
 		seq_printf(m, "  ADDR: %08x\n", error->plane[i].addr);
 		if (INTEL_INFO(dev)->gen >= 4) {
-- 
1.7.10.4