If we can't actually determine at run-time we have a fused-off display,
provide at least an option to disable it.
Signed-off-by: Damien Lespiau <damien.lespiau@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_dma.c | 3 ++-
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/i915_params.c | 4 ++++
3 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 283ace8..493c9ea 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1497,7 +1497,8 @@ static void intel_device_info_runtime_init(struct drm_device *dev)
* On CPT/PPT, we can detect this case as SFUSE_STRAP_FUSE_LOCK
* should be set when taking over after the firmware.
*/
- if (fuse_strap & ILK_INTERNAL_DISPLAY_DISABLE ||
+ if (i915.disable_display ||
+ fuse_strap & ILK_INTERNAL_DISPLAY_DISABLE ||
sfuse_strap & SFUSE_STRAP_DISPLAY_DISABLED ||
(dev_priv->pch_type == PCH_CPT &&
!(sfuse_strap & SFUSE_STRAP_FUSE_LOCK))) {
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index b1e91c3..47b207d 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1957,6 +1957,7 @@ struct i915_params {
bool fastboot;
bool prefault_disable;
bool reset;
+ bool disable_display;
};
extern struct i915_params i915 __read_mostly;
diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
index c743057..3b48258 100644
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -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@xxxxxxxxxxxxxxxxxxxxx, 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)");
--
1.8.3.1
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