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Matthew Brost 4ee08b4a72 drm/printer: Allow NULL data in devcoredump printer 
[ Upstream commit 53369581dc ]

We want to determine the size of the devcoredump before writing it out.
To that end, we will run the devcoredump printer with NULL data to get
the size, alloc data based on the generated offset, then run the
devcorecump again with a valid data pointer to print.  This necessitates
not writing data to the data pointer on the initial pass, when it is
NULL.

v5:
 - Better commit message (Jonathan)
 - Add kerenl doc with examples (Jani)

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240801154118.2547543-3-matthew.brost@intel.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-10-10 11:57:36 +02:00
..
bridge
drm: bridge: samsung-dsim: Fix waiting for empty cmd transfer FIFO on older Exynos
2023-11-20 11:59:08 +01:00
display
drm/dp: Don't attempt AUX transfers when eDP panels are not powered
2024-06-12 11:11:57 +02:00
i2c
…
ttm
mm, treewide: introduce NR_PAGE_ORDERS
2024-05-02 16:32:41 +02:00
amd_asic_type.h
…
drm_accel.h
accel: Use XArray instead of IDR for minors
2024-09-30 16:25:13 +02:00
drm_aperture.h
drm/aperture: Remove primary argument
2023-04-16 14:17:41 +02:00
drm_atomic_helper.h
drm/atomic-helpers: Invoke end_fb_access while owning plane state
2023-12-13 18:45:25 +01:00
drm_atomic_state_helper.h
drm/atomic-helper: Add an analog TV atomic_check implementation
2022-11-24 12:42:40 +01:00
drm_atomic_uapi.h
drm: handle kernel fences in drm_gem_plane_helper_prepare_fb v2
2022-05-02 09:01:51 +02:00
drm_atomic.h
drm: add helper functions to retrieve old and new crtc
2023-03-13 04:43:49 +03:00
drm_audio_component.h
drm/audio: make drm_audio_component.h self-contained
2022-11-29 14:14:51 +02:00
drm_auth.h
…
drm_blend.h
…
drm_bridge_connector.h
drm/bridge_connector: drop drm_bridge_connector_en/disable_hpd()
2023-01-05 15:08:10 +01:00
drm_bridge.h
drm/bridge: add ->edid_read hook and drm_bridge_edid_read()
2024-04-03 15:28:38 +02:00
drm_buddy.h
…
drm_cache.h
LoongArch: Add writecombine support for drm
2022-06-03 20:09:27 +08:00
drm_client.h
Merge tag 'drm-next-2023-02-23' of git://anongit.freedesktop.org/drm/drm
2023-02-22 18:28:03 -08:00
drm_color_mgmt.h
drm: using mul_u32_u32() requires linux/math64.h
2024-02-05 20:14:34 +00:00
drm_connector.h
Merge tag 'amd-drm-next-6.5-2023-06-09' of https://gitlab.freedesktop.org/agd5f/linux into drm-next
2023-06-15 14:11:22 +10:00
drm_crtc_helper.h
drm/crtc-helper: Remove most include statements from drm_crtc_helper.h
2023-01-18 09:25:32 +01:00
drm_crtc.h
drm: Remove references to removed transitional helpers
2023-07-29 21:25:16 +02:00
drm_damage_helper.h
…
drm_debugfs_crc.h
…
drm_debugfs.h
drm: debugfs: provide infrastructure to dump a DRM GPU VA space
2023-07-20 05:16:21 +02:00
drm_device.h
Merge tag 'drm-misc-next-2023-01-12' of git://anongit.freedesktop.org/drm/drm-misc into drm-next
2023-01-16 15:33:28 +10:00
drm_displayid.h
drm/edid: Parse topology block for all DispID structure v1.x
2024-06-12 11:12:05 +02:00
drm_drv.h
drm: Disable the cursor plane on atomic contexts with virtualized drivers
2024-01-31 16:19:08 -08:00
drm_edid.h
Revert "drm/edid: Fix csync detailed mode parsing"
2023-08-17 14:39:12 +03:00
drm_encoder_slave.h
drm: Remove linux/i2c.h from drm_crtc.h
2022-07-05 21:15:23 +03:00
drm_encoder.h
drm/encoder: Introduce drmm_encoder_init
2022-07-13 10:46:05 +02:00
drm_exec.h
drm/drm_exec: Work around a WW mutex lockdep oddity
2023-09-07 10:30:12 +02:00
drm_fb_dma_helper.h
drm/gem: rename GEM CMA helpers to GEM DMA helpers
2022-08-03 18:31:49 +02:00
drm_fb_helper.h
drm/fb-helper: Remove unused inline function drm_fb_helper_defio_init()
2023-07-25 20:38:37 +02:00
drm_fbdev_dma.h
drm/fbdev-dma: Implement fbdev emulation for GEM DMA helpers
2023-03-14 17:07:47 +01:00
drm_fbdev_generic.h
drm/fb-helper: Move generic fbdev emulation into separate source file
2022-11-05 17:12:04 +01:00
drm_file.h
accel: Use XArray instead of IDR for minors
2024-09-30 16:25:13 +02:00
drm_fixed.h
drm: Fix drm_fixp2int_round() making it add 0.5
2024-03-26 18:20:10 -04:00
drm_flip_work.h
…
drm_format_helper.h
drm/format-helper: Simplify drm_fb_build_fourcc_list()
2023-01-03 14:27:39 +01:00
drm_fourcc.h
drm/fourcc: Add drm_format_info.is_color_indexed flag
2022-07-09 15:00:08 +02:00
drm_framebuffer.h
drm/fb: Improve drm_framebuffer.offsets documentation
2022-07-09 15:58:52 +02:00
drm_gem_atomic_helper.h
drm/simple-kms: Remove drm_gem_simple_display_pipe_prepare_fb()
2022-12-05 13:35:37 +01:00
drm_gem_dma_helper.h
drm: Clear fd/handle callbacks in struct drm_driver
2023-06-26 11:08:41 +02:00
drm_gem_framebuffer_helper.h
drm/gem: Ignore color planes that are unused by framebuffer format
2022-05-19 19:25:02 +02:00
drm_gem_shmem_helper.h
drm: Clear fd/handle callbacks in struct drm_driver
2023-06-26 11:08:41 +02:00
drm_gem_ttm_helper.h
drm/ttm: merge ttm_bo_api.h and ttm_bo_driver.h v2
2022-12-06 12:54:14 +01:00
drm_gem_vram_helper.h
drm: Clear fd/handle callbacks in struct drm_driver
2023-06-26 11:08:41 +02:00
drm_gem.h
drm: add drm_gem_object_is_shared_for_memory_stats() helper
2024-05-02 16:32:41 +02:00
drm_gpuva_mgr.h
drm: manager to keep track of GPUs VA mappings
2023-07-20 05:15:53 +02:00
drm_ioctl.h
…
drm_kunit_helpers.h
drm/tests: helpers: Include missing drm_drv header
2024-03-26 18:19:53 -04:00
drm_lease.h
…
drm_legacy.h
…
drm_managed.h
drm: fix drmm_mutex_init()
2023-05-22 12:23:50 +02:00
drm_mipi_dbi.h
drm/mipi-dbi: Support separate I/O regulator
2022-12-14 14:57:09 +01:00
drm_mipi_dsi.h
drm/mipi-dsi: Fix theoretical int overflow in mipi_dsi_generic_write_seq()
2024-08-03 08:53:45 +02:00
drm_mm.h
…
drm_mode_config.h
drm/fbdev-generic: Remove unused prefer_shadow_fbdev flag
2023-03-22 13:32:47 +01:00
drm_mode_object.h
…
drm_modes.h
drm/modes: Add a function to generate analog display modes
2022-11-24 12:42:39 +01:00
drm_modeset_helper_vtables.h
drm/probe-helper: warn about negative .get_modes()
2024-04-03 15:28:32 +02:00
drm_modeset_helper.h
…
drm_modeset_lock.h
…
drm_module.h
…
drm_of.h
drm: of: Add drm_of_get_dsi_bus helper function
2023-01-27 09:39:21 +01:00
drm_panel.h
drm/panel: Fix kernel-doc typo for follower_lock
2023-08-03 10:21:27 +02:00
drm_pciids.h
drm: Remove some obsolete drm pciids(tdfx, mga, i810, savage, r128, sis, via)
2023-01-13 09:44:56 +01:00
drm_plane_helper.h
drm/plane-helper: Add the missing declaration of drm_atomic_state
2022-12-16 10:23:11 +01:00
drm_plane.h
drm: Allow drivers to indicate the damage helpers to ignore damage clips
2024-01-31 16:19:08 -08:00
drm_prime.h
Revert "drm/prime: Unexport helpers for fd/handle conversion"
2024-01-20 11:51:39 +01:00
drm_print.h
drm/printer: Allow NULL data in devcoredump printer
2024-10-10 11:57:36 +02:00
drm_privacy_screen_consumer.h
…
drm_privacy_screen_driver.h
…
drm_privacy_screen_machine.h
…
drm_probe_helper.h
drm: Add an HPD poll helper to reschedule the poll work
2023-08-23 17:14:37 -04:00
drm_property.h
…
drm_rect.h
drm/rect: Add DRM_RECT_INIT() macro
2022-06-27 13:45:48 +02:00
drm_self_refresh_helper.h
…
drm_simple_kms_helper.h
drm/simple-kms: Remove drm_gem_simple_display_pipe_prepare_fb()
2022-12-05 13:35:37 +01:00
drm_suballoc.h
drm/suballoc: Extract amdgpu_sa.c as generic suballocation helper
2023-03-01 17:18:19 +01:00
drm_syncobj.h
drm/syncobj: add IOCTL to register an eventfd
2023-07-20 12:01:03 +02:00
drm_sysfs.h
drm/sysfs: rename drm_sysfs_connector_status_event()
2023-06-23 15:54:00 +02:00
drm_util.h
…
drm_utils.h
…
drm_vblank_work.h
…
drm_vblank.h
drm/vblank: Add helper to get next vblank time
2023-03-28 14:52:59 -07:00
drm_vma_manager.h
drm/drm_vma_manager: Add drm_vma_node_allow_once()
2023-01-19 14:16:55 +01:00
drm_writeback.h
drm: introduce drm_writeback_connector_init_with_encoder() API
2022-05-02 02:12:59 +03:00
gma_drm.h
…
gpu_scheduler.h
gpu/drm: Eliminate DRM_SCHED_PRIORITY_UNSET
2023-10-17 20:35:38 -04:00
gud.h
…
i915_component.h
drm/i915/mtl: Define GSC Proxy component interface
2023-05-04 02:57:28 -07:00
i915_drm.h
drm/i915_drm.h: fix a typo
2023-06-02 20:05:45 +03:00
i915_gsc_proxy_mei_interface.h
drm/i915/mtl: Define GSC Proxy component interface
2023-05-04 02:57:28 -07:00
i915_hdcp_interface.h
drm/i915/hdcp: Move away from master naming to arbiter
2023-05-31 10:22:13 +05:30
i915_pciids.h
drm/i915: Add RPL-U sub platform
2023-02-16 12:29:51 +02:00
i915_pxp_tee_interface.h
mei: pxp: add command streamer API to the PXP driver
2022-10-03 11:29:11 -07:00
intel_lpe_audio.h
…
intel-gtt.h
agp/intel: Rename intel-gtt symbols
2022-06-22 15:52:55 -07:00
spsc_queue.h
…
task_barrier.h
drm: Spelling s/randevouz/rendez-vous/
2023-07-29 21:11:54 +02:00