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.lesp...@intel.com>
---
drivers/gpu/drm/i915/i915_dma.c | 9 ++++++---
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/i915_params.c | 4 ++++
3 files changed, 11 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 033c943..1d65dbd 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -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);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index a77ff73..1369336 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1965,6 +1965,7 @@ 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-de...@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)");
--
1.8.3.1
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