Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 7a10dfa6 authored by Daniel Vetter's avatar Daniel Vetter
Browse files

drm/i915: Add debug module option for VTd validation 



VTd has a few too many "outright disable the damn thing" workarounds
accumulated and for validation we want a simple knob to make sure we
disable them all.

Since this is for bdw+ validation and atm we don't have any
workarounds for bdw this option currently does nothing. So currently
this is just a placeholder to make sure reality will match with the
documented process for our validation people.

v2: Fix up param description (Jani).

v3: Actually git add ...

Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Reviewed-by: default avatarJani Nikula <jani.nikula@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 4b28a1f3

drivers/gpu/drm/i915/i915_drv.h

+1 −0
Original line number Diff line number Diff line
@@ -1923,6 +1923,7 @@ struct i915_params { 
	bool prefault_disable;

	bool reset;

	bool disable_display;

	bool disable_vtd_wa;

};

extern struct i915_params i915 __read_mostly;

drivers/gpu/drm/i915/i915_params.c

+4 −0
Original line number Diff line number Diff line
@@ -47,6 +47,7 @@ struct i915_params i915 __read_mostly = { 
	.invert_brightness = 0,

	.disable_display = 0,

	.enable_cmd_parser = 1,

	.disable_vtd_wa = 0,

};



module_param_named(modeset, i915.modeset, int, 0400);
@@ -149,6 +150,9 @@ MODULE_PARM_DESC(invert_brightness, 
module_param_named(disable_display, i915.disable_display, bool, 0600);

MODULE_PARM_DESC(disable_display, "Disable display (default: false)");



module_param_named(disable_vtd_wa, i915.disable_vtd_wa, bool, 0600);

MODULE_PARM_DESC(disable_vtd_wa, "Disable all VT-d workarounds (default: false)");



module_param_named(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);

MODULE_PARM_DESC(enable_cmd_parser,

		 "Enable command parsing (1=enabled [default], 0=disabled)");