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drm/i915: Add module param to test the load detect code

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This is useful for writing igts to make sure we don't break this,
without being forced to own a one of these dinosaurs.

Suggested-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2015-03-03 18:03:47 +01:00
parent 55bb9992db
commit 5bedeb2de2
3 changed files with 12 additions and 3 deletions
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1
drivers/gpu/drm/i915/i915_drv.h
View File

@ -2462,6 +2462,7 @@ struct i915_params {
bool enable_hangcheck;
bool fastboot;
bool prefault_disable;
bool load_detect_test;
bool reset;
bool disable_display;
bool disable_vtd_wa;

8
drivers/gpu/drm/i915/i915_params.c
View File

@ -43,6 +43,7 @@ struct i915_params i915 __read_mostly = {
.enable_ips = 1,
.fastboot = 0,
.prefault_disable = 0,
.load_detect_test = 0,
.reset = true,
.invert_brightness = 0,
.disable_display = 0,
@ -139,11 +140,16 @@ module_param_named(fastboot, i915.fastboot, bool, 0600);
MODULE_PARM_DESC(fastboot,
"Try to skip unnecessary mode sets at boot time (default: false)");
module_param_named(prefault_disable, i915.prefault_disable, bool, 0600);
module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600);
MODULE_PARM_DESC(prefault_disable,
"Disable page prefaulting for pread/pwrite/reloc (default:false). "
"For developers only.");
module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600);
MODULE_PARM_DESC(load_detect_test,
"Force-enable the VGA load detect code for testing (default:false). "
"For developers only.");
module_param_named(invert_brightness, i915.invert_brightness, int, 0600);
MODULE_PARM_DESC(invert_brightness,
"Invert backlight brightness "

6
drivers/gpu/drm/i915/intel_crt.c
View File

@ -690,7 +690,7 @@ intel_crt_detect(struct drm_connector *connector, bool force)
* broken monitor (without edid) to work behind a broken kvm (that fails
* to have the right resistors for HP detection) needs to fix this up.
* For now just bail out. */
if (I915_HAS_HOTPLUG(dev)) {
if (I915_HAS_HOTPLUG(dev) && !i915.load_detect_test) {
status = connector_status_disconnected;
goto out;
}
@ -706,8 +706,10 @@ intel_crt_detect(struct drm_connector *connector, bool force)
if (intel_get_load_detect_pipe(connector, NULL, &tmp, &ctx)) {
if (intel_crt_detect_ddc(connector))
status = connector_status_connected;
else
else if (INTEL_INFO(dev)->gen < 4)
status = intel_crt_load_detect(crt);
else
status = connector_status_unknown;
intel_release_load_detect_pipe(connector, &tmp, &ctx);
} else
status = connector_status_unknown;