Re: [PATCH 1/3] drm/i915: Capture dmc firmware information before reset

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On 2/24/2017 11:34 AM, Chris Wilson wrote:
On Fri, Feb 24, 2017 at 11:25:29AM -0800, Michel Thierry wrote:
On 2/24/2017 11:22 AM, Chris Wilson wrote:
On Fri, Feb 24, 2017 at 11:05:28AM -0800, Michel Thierry wrote:
The firmware may change between the hang and cat /sys/class/drm/card0/error

Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Michel Thierry <michel.thierry@xxxxxxxxx>

Looks sane...

---
drivers/gpu/drm/i915/i915_drv.h       |  4 ++++
drivers/gpu/drm/i915/i915_gpu_error.c | 22 ++++++++++++++++------
2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index a74b87b1b5a9..3b0cff05f5f7 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -953,6 +953,10 @@ struct i915_gpu_state {
	u32 gab_ctl;
	u32 gfx_mode;

+	/* Firmware load state */
+	u32 dmc_loaded;

Can dmc_version be zero? i.e. Does !0 => dmc_loaded?


Nothing would stop them to build a v0.0 firmware, but in this case,
we can save one variable.

On the other guc thread, the suggestion is to use 0 as an invalid
version...
-Chris

ok, let's go with that, I'll remove *_loaded.
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