drm/i915/bdw: Interrupts with logical rings

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We need to attend context switch interrupts from all rings. Also, fixed writing
IMR/IER and added HWSTAM at ring init time.

Notice that, if added to irq_enable_mask, the context switch interrupts would
be incorrectly masked out when the user interrupts are due to no users waiting
on a sequence number. Therefore, this commit adds a bitmask of interrupts to
be kept unmasked at all times.

v2: Disable HWSTAM, as suggested by Damien (nobody listens to these interrupts,
anyway).

v3: Add new get/put_irq functions.

Signed-off-by: Thomas Daniel <thomas.daniel@intel.com> (v1)
Signed-off-by: Oscar Mateo <oscar.mateo@intel.com> (v2 & v3)
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
[danvet: Drop the GEN8_ prefix from the context switch interrupt
define and move it to its brethren.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

...

This commit is contained in:

Oscar Mateo 2014-07-24 17:04:31 +01:00 • committed by Daniel Vetter

parent 9832b9dae8

commit 73d477f6bb

4 changed files with 77 additions and 3 deletions

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19

drivers/gpu/drm/i915/i915_irq.c

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2

drivers/gpu/drm/i915/i915_reg.h

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58

drivers/gpu/drm/i915/intel_lrc.c

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1

drivers/gpu/drm/i915/intel_ringbuffer.h

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