drm/i915: Implement Dbuf overlap detection feature starting from LNL

Browse source

From LNL onwards there is a new hardware feature, which
allows to detect if the driver wrongly allocated DBuf
entries and they happen to overlap. If enabled this will
cause a specific interrupt to occur.
We now handle it in the driver, by writing correspondent
error message to kernel log.

v2: Initialize dbuf overlap flag in runtime_defaults (Jani Nikula)

v3: Unmask the overlap detection interrupt (Uma)

v4: use display over i915 (Jani Nikula)

v5: Use display instead of dev_priv (Jani Nikula)

v6: rebased to resolve merge conflicts

Bspec: 69450, 69464
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241030103319.207235-1-vinod.govindapillai@intel.com

...

This commit is contained in:

Stanislav Lisovskiy 2024-10-30 12:33:19 +02:00 • committed by Matt Roper

parent 1f12d63a14

commit 98d2f2530f

4 changed files with 19 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

5

drivers/gpu/drm/i915/display/intel_display_device.c

View file

2

drivers/gpu/drm/i915/display/intel_display_device.h

View file

10

drivers/gpu/drm/i915/display/intel_display_irq.c

View file

2

drivers/gpu/drm/i915/i915_reg.h

View file