kernel.git/drivers/gpu/drm/i915/Kconfig.debug, branch linux-4.12.y

drm/i915: Make vblank evade warnings optional

2017-05-12T04:28:02Z

Add a new Kconfig option to enable/disable the extra warnings from the vblank evade code. For now we'll keep the warning about an actually missed vblank always enabled as that can have an actual user visible impact. But if we miss the deadline othrwise there's no real need to bother the user with that. We'll want these warnings enabled during development however so that we can catch regressions. Based on the reports it looks like this is still very easy to hit on SKL, so we have more work ahead of us to optimize the crtiical section further. Cc: Daniel Vetter Cc: Jani Nikula Cc: Dave Airlie Cc: Jens Axboe Cc: Linus Torvalds Cc: Maarten Lankhorst Reported-by: Jens Axboe Reported-by: Linus Torvalds Fixes: e1edbd44e23b ("drm/i915: Complain if we take too long under vblank evasion.") Signed-off-by: Ville Syrjälä Reviewed-by: Daniel Vetter Signed-off-by: Dave Airlie

drm/i915/tracepoints: Add request submit and execute tracepoints

2017-02-21T13:18:14Z

These new tracepoints are emitted once the request is ready to be submitted to the GPU and once the request is about to be submitted to the GPU, respectively. Former condition triggers as soon as all the fences and dependencies have been resolved, and the latter once the backend is about to submit it to the GPU. New tracepoint are enabled via the new DRM_I915_LOW_LEVEL_TRACEPOINTS Kconfig option which is disabled by default to alleviate the performance impact concerns. v2: Move execute tracepoint to __i915_gem_request_submit. (Chris Wilson) Signed-off-by: Tvrtko Ursulin Reviewed-by: Chris Wilson

drm/i915: Use fault-injection to force the shrinker to run in live GTT tests

2017-02-13T20:46:32Z

It is possible whilst allocating the page-directory tree for a ppgtt bind that the shrinker may run and reap unused parts of the tree. If the shrinker happens to remove a chunk of the tree that the allocate_va_range has already processed, we may then try to insert into the dangling tree. This test uses the fault-injection framework to force the shrinker to be invoked before we allocate new pages, i.e. new chunks of the PD tree. References: https://bugs.freedesktop.org/show_bug.cgi?id=99295 Signed-off-by: Chris Wilson Reviewed-by: Matthew Auld

drm/i915: Provide a hook for selftests

2017-02-13T20:45:21Z

Some pieces of code are independent of hardware but are very tricky to exercise through the normal userspace ABI or via debugfs hooks. Being able to create mock unit tests and execute them through CI is vital. Start by adding a central point where we can execute unit tests and a parameter to enable them. This is disabled by default as the expectation is that these tests will occasionally explode. To facilitate integration with igt, any parameter beginning with i915.igt__ is interpreted as a subtest executable independently via igt/drv_selftest. Two classes of selftests are recognised: mock unit tests and integration tests. Mock unit tests are run as soon as the module is loaded, before the device is probed. At that point there is no driver instantiated and all hw interactions must be "mocked". This is very useful for writing universal tests to exercise code not typically run on a broad range of architectures. Alternatively, you can hook into the live selftests and run when the device has been instantiated - hw interactions are real. v2: Add a macro for compiling conditional code for mock objects inside real objects. v3: Differentiate between mock unit tests and late integration test. v4: List the tests in natural order, use igt to sort after modparam. v5: s/late/live/ v6: s/unsigned long/unsigned int/ v7: Use igt_ prefixes for long helpers. v8: Deobfuscate macros overriding functions, stop using -I$(src) Signed-off-by: Chris Wilson Reviewed-by: Tvrtko Ursulin Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-1-chris@chris-wilson.co.uk

drm/i915: Build DRM range manager selftests for CI

2017-02-02T13:59:05Z

Build the struct drm_mm selftests so that we can trivially run them within our CI. "Enable debug, become developer." - Joonas Lahtinen Signed-off-by: Chris Wilson Reviewed-by: Joonas Lahtinen Link: http://patchwork.freedesktop.org/patch/msgid/20170125101102.9010-3-chris@chris-wilson.co.uk

drm/i915: Enable swfence debugobject support for i915.ko

2016-12-05T20:49:17Z

Only once the debugobject symbols are exported can we enable support for debugging swfences when i915 is built as a module. Requires commit 2617fdca3f68 ("lib/debugobjects: export for use in modules") Signed-off-by: Chris Wilson Reviewed-by: Joonas Lahtinen Link: http://patchwork.freedesktop.org/patch/msgid/20161205142941.21965-5-chris@chris-wilson.co.uk

drm/i915: Add I2C and DP-AUX char devices to debug kconfig

2016-12-05T11:17:34Z

These char devices exposing the driver's I2C and DP-AUX adapters for user space tools are useful to debug display output related issues. Enable them with the rest of additional driver debug options. Suggested-by: Chris Wilson Signed-off-by: Imre Deak Reviewed-by: Jani Nikula Link: http://patchwork.freedesktop.org/patch/msgid/1480696541-13697-1-git-send-email-imre.deak@intel.com

drm/i915: Integrate i915_sw_fence with debugobjects

2016-11-25T13:49:26Z

Add the tracking required to enable debugobjects for fences to improve error detection in BAT. The debugobject interface lets us track the lifetime and phases of the fences even while being embedded into larger structs, i.e. to check they are not used after they have been released. v2: Don't populate the stubs, debugobjects checks for a NULL pointer and treats it equivalently. Signed-off-by: Chris Wilson Reviewed-by: Joonas Lahtinen Link: http://patchwork.freedesktop.org/patch/msgid/20161125131718.20978-4-chris@chris-wilson.co.uk

drm/i915: Restrict DRM_DEBUG_MM automatic selection

2016-11-09T01:13:48Z

DRM_DEBUG_MM is only valid if the DRM.ko is builtin as currently depot_save_stack is not exported. Fixes: 5c7fcf2db027 ("drm/i915: Enable drm_mm debug when enabling DRM_I915_DEBUG") Signed-off-by: Chris Wilson Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20161108131917.6253-1-chris@chris-wilson.co.uk

drm/i915: Enable drm_mm debug when enabling DRM_I915_DEBUG

2016-11-08T09:35:52Z

A frequent issue that arises on shutdown is the drm_mm range manager complaining of a leak. To aide debugging those, drm can now track the allocation callsite and print those for the leaks. Signed-off-by: Chris Wilson Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20161029184214.17329-2-chris@chris-wilson.co.uk