linux/drivers/gpu
Chris Wilson 3dd66a94de drm/i915/gt: Always send a pulse down the engine after disabling heartbeat
Currently, we check we can send a pulse prior to disabling the
heartbeat to verify that we can change the heartbeat, but since we may
re-evaluate execution upon changing the heartbeat interval we need another
pulse afterwards to refresh execution.

v2: Tvrtko asked if we could reduce the double pulse to a single, which
opened up a discussion of how we should handle the pulse-error after
attempting to change the property, and the desire to serialise
adjustment of the property with its validating pulse, and unwind upon
failure.

Fixes: 9a40bddd47 ("drm/i915/gt: Expose heartbeat interval via sysfs")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: <stable@vger.kernel.org> # v5.7+
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Acked-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200928221510.26044-2-chris@chris-wilson.co.uk
2020-09-29 09:03:17 +01:00
..
drm drm/i915/gt: Always send a pulse down the engine after disabling heartbeat 2020-09-29 09:03:17 +01:00
host1x gpu: host1x: debug: Dump push buffer state 2020-07-17 16:06:14 +02:00
ipu-v3 gpu: ipu-v3: image-convert: Wait for all EOFs before completing a tile 2020-07-20 15:16:05 +02:00
trace
vga vgaarb: mark vga_tryget static 2020-08-01 11:28:17 +02:00
Makefile