From a0bae57f5b9d61c64f5c2675a53fec27baf583d9 Mon Sep 17 00:00:00 2001 From: Damien Lespiau Date: Mon, 10 Feb 2014 17:20:55 +0000 Subject: [PATCH] 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 Signed-off-by: Daniel Vetter --- 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 033c943b6bae..1d65dbd15c39 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 0580d979f88d..96601149cab8 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1958,6 +1958,7 @@ 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 c743057b6511..3b482585c5ae 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@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)"); -- 2.20.1