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drm/i915: Provide a command line option to disable display 

If we can't actually determine at run-time we have a fused-off display,
provide at least an option to disable it.

v2: Move the i915.disable_display test in a separate check
    (Daniel Vetter)

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Damien Lespiau 2014-02-10 17:20:55 +00:00 committed by Daniel Vetter
parent 658ac4c6a2
commit a0bae57f5b
3 changed files with 11 additions and 3 deletions
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9
drivers/gpu/drm/i915/i915_dma.c
View File

@ -1483,9 +1483,12 @@ static void intel_device_info_runtime_init(struct drm_device *dev)
if (IS_VALLEYVIEW(dev))
info->num_sprites = 2;
if (info->num_pipes > 0 &&
(INTEL_INFO(dev)->gen == 7 || INTEL_INFO(dev)->gen == 8) &&
!IS_VALLEYVIEW(dev)) {
if (i915.disable_display) {
DRM_INFO("Display disabled (module parameter)\n");
info->num_pipes = 0;
} else if (info->num_pipes > 0 &&
(INTEL_INFO(dev)->gen == 7 || INTEL_INFO(dev)->gen == 8) &&
!IS_VALLEYVIEW(dev)) {
u32 fuse_strap = I915_READ(FUSE_STRAP);
u32 sfuse_strap = I915_READ(SFUSE_STRAP);

1
drivers/gpu/drm/i915/i915_drv.h
View File

@ -1958,6 +1958,7 @@ struct i915_params {
bool fastboot;
bool prefault_disable;
bool reset;
bool disable_display;
};
extern struct i915_params i915 __read_mostly;

4
drivers/gpu/drm/i915/i915_params.c
View File

@ -47,6 +47,7 @@ struct i915_params i915 __read_mostly = {
.prefault_disable = 0,
.reset = true,
.invert_brightness = 0,
.disable_display = 0,
};
module_param_named(modeset, i915.modeset, int, 0400);
@ -153,3 +154,6 @@ MODULE_PARM_DESC(invert_brightness,
"report PCI device ID, subsystem vendor and subsystem device ID "
"to dri-devel@lists.freedesktop.org, if your machine needs it. "
"It will then be included in an upcoming module version.");
module_param_named(disable_display, i915.disable_display, bool, 0600);
MODULE_PARM_DESC(disable_display, "Disable display (default: false)");