From 48572edd9d736d6fabd40b810a0de844ee4f800b Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Thu, 18 Dec 2014 10:55:50 +0000 Subject: drm/i915: Disable the mmio.debug WARN after it fires If we have a single unclaimed register, we will have lots. A WARN for each one makes the machine unusable and does not aid debugging. Convert the i915.mmio_debug option to a counter for how many WARNs to fire before shutting up. Even when i915.mmio_debug was disabled it would continue to shout an *ERROR* for every interrupt, without any information at all for debugging. The massive verbiage was added in commit 5978118c39c2f72fd8b39ef9c086723542384809 Author: Paulo Zanoni Date: Wed Jul 16 17:49:29 2014 -0300 drm/i915: reorganize the unclaimed register detection code v2: Automatically enable invalid mmio reporting for the *next* invalid access if mmio_debug is disabled by default. This should give us clearer debug information without polluting the logs too much. v3: Compile fixes, rebase. Signed-off-by: Chris Wilson Cc: Rodrigo Vivi Cc: Paulo Zanoni Cc: Daniel Vetter Reviewed-by: Paulo Zanoni [danvet: Update modparam text per the thread.] Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_params.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/gpu/drm/i915/i915_params.c') diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c index 44f2262a5553..e2d20ffe6586 100644 --- a/drivers/gpu/drm/i915/i915_params.c +++ b/drivers/gpu/drm/i915/i915_params.c @@ -171,10 +171,10 @@ module_param_named(use_mmio_flip, i915.use_mmio_flip, int, 0600); MODULE_PARM_DESC(use_mmio_flip, "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)"); -module_param_named(mmio_debug, i915.mmio_debug, bool, 0600); +module_param_named(mmio_debug, i915.mmio_debug, int, 0600); MODULE_PARM_DESC(mmio_debug, - "Enable the MMIO debug code (default: false). This may negatively " - "affect performance."); + "Enable the MMIO debug code for the first N failures (default: off). " + "This may negatively affect performance."); module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600); MODULE_PARM_DESC(verbose_state_checks, -- cgit v1.2.3