linux-stable/include/drm
Lyude Paul a18b219294 drm/dp_helper: Add DP aux channel tracing
This is something we've needed for a very long time now, as it makes
debugging issues with faulty MST hubs along with debugging issues
regarding us interfacing with hubs correctly vastly easier to debug.
Currently this can actually be done if you trace the i2c devices for DP
using ftrace but that's significantly less useful for a couple of
reasons:

- Tracing the i2c devices through ftrace means all of the traces are
  going to contain a lot of "garbage" output that we're sending over the
  i2c line. Most of this garbage comes from retrying transactions, DRM's
  helper library adding extra transactions to work around bad hubs, etc.
- Having a user set up ftrace so that they can provide debugging
  information is a lot more difficult then being able to say "just boot
  with drm.debug=0x100"
- We can potentially expand upon this tracing in the future to print
  debugging information in regards to other DP transactions like MST
  sideband transactions

This is inspired by a patch Rob Clark sent to do this a long time back.
Neither of us could find the patch however, so we both assumed it would
probably just be easier to rewrite it anyway.

Cc: Rob Clark <robdclark@gmail.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20180716154432.13433-1-lyude@redhat.com
2018-07-16 11:47:53 -04:00
..
bridge drm for v4.18-rc1 2018-06-06 08:16:33 -07:00
i2c
tinydrm drm/tinydrm: Fix doc build warnings 2018-07-11 22:24:02 +02:00
ttm drm/ttm: Export the ttm_k[un]map_atomic_prot API. 2018-03-22 11:10:06 +01:00
amd_asic_type.h drm/amdgpu: Add vega20 to asic_type enum. 2018-05-17 10:13:09 -05:00
ati_pcigart.h
drm_agpsupport.h
drm_atomic.h drm: writeback: Add out-fences for writeback connectors 2018-06-20 15:29:18 +01:00
drm_atomic_helper.h drm/crtc: Add a generic infrastructure to fake VBLANK events 2018-07-07 07:53:09 +02:00
drm_auth.h
drm_blend.h drm/blend: Add a generic alpha property 2018-04-16 21:17:29 +02:00
drm_bridge.h drm/bridge: Move the struct drm_bridge member kerneldoc inline. 2018-06-21 14:00:06 -07:00
drm_cache.h drm: add func to get max iomem address v2 2018-02-13 11:57:59 -05:00
drm_client.h drm/debugfs: Add internal client debugfs file 2018-07-10 14:53:35 +02:00
drm_color_mgmt.h drm: Introduce drm_color_lut_size() 2018-03-16 15:44:01 +02:00
drm_connector.h drm: drop _mode_ from remaining connector functions 2018-07-13 18:40:27 +02:00
drm_crtc.h drm/doc: use inline kerneldoc style for drm_crtc_state 2018-07-13 18:40:28 +02:00
drm_crtc_helper.h drm: Allow determining if current task is output poll worker 2018-02-16 22:30:06 +01:00
drm_debugfs.h
drm_debugfs_crc.h drm/crc: Only report a single overflow when a CRC fd is opened 2018-07-06 14:57:03 +02:00
drm_device.h drm: Begin an API for in-kernel clients 2018-07-10 14:51:37 +02:00
drm_displayid.h
drm_dp_dual_mode_helper.h
drm_dp_helper.h drm: add support for DisplayPort CEC-Tunneling-over-AUX 2018-07-13 17:58:19 +03:00
drm_dp_mst_helper.h
drm_drv.h drm: move drv test macros out of drmP.h 2018-07-13 18:40:27 +02:00
drm_edid.h drm: Don't EXPORT drm_add/reset_display_info 2018-04-24 21:34:53 +02:00
drm_encoder.h drm: Add drm_encoder_mask() 2018-07-02 18:45:55 +03:00
drm_encoder_slave.h
drm_fb_cma_helper.h drm/cma-helper: Remove drm_fb_cma_fbdev_init_with_funcs() 2018-07-10 14:54:50 +02:00
drm_fb_helper.h drm/fb-helper: Finish the generic fbdev emulation 2018-07-10 14:54:09 +02:00
drm_file.h drm: writeback: Add client capability for exposing writeback connectors 2018-06-20 15:30:20 +01:00
drm_fixed.h
drm_flip_work.h
drm_fourcc.h drm/fourcc: Add a alpha field to drm_format_info 2018-01-29 12:07:47 +01:00
drm_framebuffer.h drm/framebuffer: Print task that allocated the fb in debug info. 2017-12-20 15:30:17 +01:00
drm_gem.h drm: move read_domains and write_domain into i915 2018-02-16 14:12:48 +00:00
drm_gem_cma_helper.h
drm_gem_framebuffer_helper.h drm: Move simple_display_pipe prepare_fb helper into gem fb helpers 2018-04-24 13:57:22 +02:00
drm_global.h
drm_hashtab.h
drm_hdcp.h drm: Fix HDCP downstream dev count read 2018-04-16 12:10:48 -04:00
drm_ioctl.h drm: remove all control node code 2018-05-03 21:26:32 +02:00
drm_irq.h
drm_lease.h
drm_legacy.h drm: prefer inline over __inline__ 2018-03-28 09:34:12 +03:00
drm_mipi_dsi.h
drm_mm.h drm/mm: Add a search-by-address variant to only inspect a single hole 2018-05-24 15:04:30 +01:00
drm_mode_config.h drm: Document mode_config.max_width/height as the max fb dimensions 2018-06-21 19:16:07 +03:00
drm_mode_object.h drm: remove drm_mode_object_{un/reference} aliases 2018-03-19 09:09:46 -04:00
drm_modes.h drm: drop _mode_ from remaining connector functions 2018-07-13 18:40:27 +02:00
drm_modeset_helper.h
drm_modeset_helper_vtables.h drm: drop _mode_ from update_edit_property() 2018-07-13 18:40:27 +02:00
drm_modeset_lock.h
drm_of.h drm: of: Export and rename drm_crtc_port_mask() 2018-06-27 21:44:04 +02:00
drm_os_linux.h
drm_panel.h drm/panel: Make of_drm_find_panel() return an ERR_PTR() instead of NULL 2018-07-10 17:59:05 +02:00
drm_pci.h
drm_pciids.h
drm_plane.h drm: switch drm_plane to inline comments 2018-07-13 18:40:28 +02:00
drm_plane_helper.h drm: add missing ctx argument to plane transitional helpers 2018-07-03 09:30:19 +02:00
drm_prime.h dma-buf: remove kmap_atomic interface 2018-06-20 15:59:34 +02:00
drm_print.h drm/dp_helper: Add DP aux channel tracing 2018-07-16 11:47:53 -04:00
drm_property.h drm: Fix kerneldoc for DRM_MODE_PROP_IMMUTABLE 2018-07-13 12:18:03 -04:00
drm_rect.h drm/rect: Handle rounding errors in drm_rect_clip_scaled, v3. 2018-05-04 11:09:54 +02:00
drm_scdc_helper.h
drm_simple_kms_helper.h drm: Move simple_display_pipe prepare_fb helper into gem fb helpers 2018-04-24 13:57:22 +02:00
drm_syncobj.h drm/syncobj: some kerneldoc polish 2017-12-15 11:26:52 +01:00
drm_sysfs.h
drm_utils.h
drm_vblank.h Merge tag 'drm-intel-next-2018-02-21' of git://anongit.freedesktop.org/drm/drm-intel into drm-next 2018-03-01 14:07:22 +10:00
drm_vma_manager.h
drm_writeback.h drm/atomic: Avoid connector to writeback_connector casts 2018-07-07 07:51:19 +02:00
drmP.h drm: move drv test macros out of drmP.h 2018-07-13 18:40:27 +02:00
gma_drm.h
gpu_scheduler.h drm/scheduler: Avoid using wait_event_killable for dying process (V4) 2018-06-15 12:20:33 -05:00
i915_component.h drm/i915/cnl: Add Port F definition. 2018-01-19 17:51:35 -02:00
i915_drm.h x86/early-quirks: export the stolen region as a resource 2017-12-12 12:30:18 +02:00
i915_pciids.h drm/i915/aml: Introducing Amber Lake platform 2018-06-18 10:49:57 -07:00
intel-gtt.h drm/i915: prefer resource_size_t for everything stolen 2017-12-12 12:30:22 +02:00
intel_lpe_audio.h
spsc_queue.h drm: move amd_gpu_scheduler into common location 2017-12-07 11:51:56 -05:00