Just another useful register to inspect following a GPU hang.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/i915_gpu_error.c | 4 ++++
2 files changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index e7357656728e..b5abf88e908e 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -534,6 +534,7 @@ struct drm_i915_error_state {
u32 tail;
u32 head;
u32 ctl;
+ u32 mode;
u32 hws;
u32 ipeir;
u32 ipehr;
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c
b/drivers/gpu/drm/i915/i915_gpu_error.c
index 5d8fd0beda2e..c48277fbe6a7 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -237,6 +237,8 @@ static void error_print_engine(struct
drm_i915_error_state_buf *m,
err_printf(m, " HEAD: 0x%08x\n", ee->head);
err_printf(m, " TAIL: 0x%08x\n", ee->tail);
err_printf(m, " CTL: 0x%08x\n", ee->ctl);
+ err_printf(m, " MODE: 0x%08x [idle? %d]\n",
+ ee->mode, !!(ee->mode & MODE_IDLE));
err_printf(m, " HWS: 0x%08x\n", ee->hws);
err_printf(m, " ACTHD: 0x%08x %08x\n",
(u32)(ee->acthd>>32), (u32)ee->acthd);
@@ -979,6 +981,8 @@ static void error_record_engine_registers(struct
drm_i915_error_state *error,
ee->head = I915_READ_HEAD(engine);
ee->tail = I915_READ_TAIL(engine);
ee->ctl = I915_READ_CTL(engine);
+ if (INTEL_GEN(dev_priv) > 2)
+ ee->mode = I915_READ_MODE(engine);
if (I915_NEED_GFX_HWS(dev_priv)) {
i915_reg_t mmio;
--
2.8.1
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