Ard Biesheuvel
e02f5c1bb2
drm: disable uncached DMA optimization for ARM and arm64 ...
The DRM driver stack is designed to work with cache coherent devices
only, but permits an optimization to be enabled in some cases, where
for some buffers, both the CPU and the GPU use uncached mappings,
removing the need for DMA snooping and allocation in the CPU caches.
The use of uncached GPU mappings relies on the correct implementation
of the PCIe NoSnoop TLP attribute by the platform, otherwise the GPU
will use cached mappings nonetheless. On x86 platforms, this does not
seem to matter, as uncached CPU mappings will snoop the caches in any
case. However, on ARM and arm64, enabling this optimization on a
platform where NoSnoop is ignored results in loss of coherency, which
breaks correct operation of the device. Since we have no way of
detecting whether NoSnoop works or not, just disable this
optimization entirely for ARM and arm64.
Cc: Christian Koenig <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: David Zhou <David1.Zhou@amd.com>
Cc: Huang Rui <ray.huang@amd.com>
Cc: Junwei Zhang <Jerry.Zhang@amd.com>
Cc: Michel Daenzer <michel.daenzer@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: Sean Paul <sean@poorly.run>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: amd-gfx list <amd-gfx@lists.freedesktop.org>
Cc: dri-devel <dri-devel@lists.freedesktop.org>
Reported-by: Carsten Haitzler <Carsten.Haitzler@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.kernel.org/patch/10778815/
Signed-off-by: Christian König <christian.koenig@amd.com>
2019-02-06 19:32:30 +01:00
drm/bridge: dw-hdmi: Add SCDC and TMDS Scrambling support
2019-02-01 13:15:07 +01:00
drm/tinydrm: Use damage helper for dirtyfb
2019-01-17 10:57:15 +01:00
drm: Trivial comment grammar cleanups
2019-02-04 10:21:17 +01:00
drm/amdgpu: simplify Raven, Raven2, and Picasso handling
2018-09-14 09:38:03 -05:00
drm/atomic: Add drm_atomic_state->duplicated
2019-02-05 18:19:00 -05:00
drm: Fix up drm_atomic_state_helper.[hc] extraction
2018-11-30 16:37:52 +01:00
drm: Fix up drm_atomic_state_helper.[hc] extraction
2018-11-30 16:37:52 +01:00
drm: extract drm_atomic_uapi.c
2018-09-09 14:19:18 +02:00
ALSA: hda: Make audio component support more generic
2018-07-17 22:25:48 +02:00
drm: Add per-plane pixel blend mode property
2018-08-24 17:31:37 +01:00
drm: bridge: Constify mode arguments to bridge .mode_set() operation
2019-01-14 03:51:14 +02:00
drm: disable uncached DMA optimization for ARM and arm64
2019-02-06 19:32:30 +01:00
drm: Trivial comment grammar cleanups
2019-02-04 10:21:17 +01:00
drm: drop drmP.h include from drm_plane.c
2018-09-09 14:19:17 +02:00
drm: Trivial comment grammar cleanups
2019-02-04 10:21:17 +01:00
drm: Move the legacy kms disable_all helper to crtc helpers
2019-01-11 22:54:29 +01:00
drm: Split out drm_probe_helper.h
2019-01-24 13:20:42 +01:00
drm/damage-helper: Add drm_atomic_helper_damage_merged()
2019-01-17 10:56:54 +01:00
drm/crc: Only report a single overflow when a CRC fd is opened
2018-07-06 14:57:03 +02:00
drm/vblank: Allow dynamic per-crtc max_vblank_count
2019-01-14 21:23:55 +02:00
drm/dp/mst: Provide better debugs for NAK replies
2019-01-30 23:23:13 +02:00
drm/dp_mst: Start tracking per-port VCPI allocations
2019-01-10 20:42:13 -05:00
drm/irq: Ditch DRIVER_IRQ_SHARED
2019-01-29 15:45:21 +01:00
drm/dsc: Define the DSC 1.1 and 1.2 Line Buffer depth constants
2018-11-27 18:36:17 -08:00
drm/edid: Add display_info.rgb_quant_range_selectable
2019-01-10 19:01:06 +02:00
drm: Add drm/drm_util.h header file
2018-09-09 14:18:11 +02:00
drm: remove include of drmP.h from drm_encoder_slave.h
2019-01-09 22:35:35 +01:00
drm/cma-helper: Remove unused fbdev code
2019-01-17 10:56:38 +01:00
drm/fb-helper: document remove*_conflicting_framebuffers()
2018-09-07 22:07:49 +02:00
drm: include idr.h from drm_file.h
2019-01-02 11:37:56 +02:00
drm/fourcc: Add format info helpers for checking YUV sub-sampling
2019-01-18 19:00:18 +01:00
drm: make drm_framebuffer.h self contained
2019-01-09 22:11:28 +01:00
drm: remove deprecated "[__]drm_gem_object_[un]reference[_locked]" functions
2018-11-24 22:12:54 +01:00
drm: remove drmP.h from drm_gem_cma_helper.h
2019-01-09 22:54:08 +01:00
drm/gem-fb-helper: Add drm_gem_fb_create_with_dirty()
2019-01-17 10:56:45 +01:00
drm: include types.h from drm_hdcp.h
2019-01-02 11:38:01 +02:00
drm: remove all control node code
2018-05-03 21:26:32 +02:00
drm: un-inline drm_legacy_findmap()
2019-01-02 11:37:11 +02:00
drm: dsi: Add lane clock rate fields to DSI device
2018-10-24 16:26:35 +02:00
drm/mm: Add a search-by-address variant to only inspect a single hole
2018-05-24 15:04:30 +01:00
drm: Trivial comment grammar cleanups
2019-02-04 10:21:17 +01:00
drm: remove drm_mode_object_{un/reference} aliases
2018-03-19 09:09:46 -04:00
drm: Complete remove drm_mode_object dependency
2019-01-15 13:22:23 +01:00
drm/modeset-helper: Add simple modeset suspend/resume helpers
2017-11-30 18:18:08 +01:00
drm: Trivial comment grammar cleanups
2019-02-04 10:21:17 +01:00
drm: Trivial comment grammar cleanups
2019-02-04 10:21:17 +01:00
drm: of: Export and rename drm_crtc_port_mask()
2018-06-27 21:44:04 +02:00
This is the 4.19-rc6 release
2018-10-04 11:03:34 +10:00
drm: drop drm_pcie_get_speed_cap_mask and drm_pcie_get_max_link_width
2018-07-05 16:40:00 -05:00
drm/radeon: change SPDX identifier to MIT
2018-10-15 16:16:12 -05:00
drm: Add helper iterator functions for plane fb_damage_clips blob
2018-12-05 10:00:36 +01:00
drm: Unexport drm_plane_helper_check_update
2018-10-05 22:45:19 +02:00
drm/prime: Add drm_gem_prime_mmap()
2018-11-20 14:54:53 +01:00
Merge drm/drm-next into drm-misc-next
2018-08-27 10:00:03 -04:00
drm: Split out drm_probe_helper.h
2019-01-24 13:20:42 +01:00
drm: Fix kernel doc for DRM_MODE_PROP_IMMUTABLE
2018-10-03 13:05:12 -07:00
drm/rect: Handle rounding errors in drm_rect_clip_scaled, v3.
2018-05-04 11:09:54 +02:00
drm: Move simple_display_pipe prepare_fb helper into gem fb helpers
2018-04-24 13:57:22 +02:00
Merge drm/drm-next into drm-intel-next-queued
2019-01-08 10:50:22 +02:00
drm: fix drm_can_sleep() comment
2019-01-21 10:30:12 +01:00
drm: Add panel orientation quirks, v6.
2017-12-04 23:03:21 +01:00
drm/vblank: Allow dynamic per-crtc max_vblank_count
2019-01-14 21:23:55 +02:00
drm/i915: Prevent writing into a read-only object via a GGTT mmap
2018-07-13 16:14:04 +01:00
drm/atomic: Avoid connector to writeback_connector casts
2018-07-07 07:51:19 +02:00
drm: move EXPORT_SYMBOL_FOR_TESTS_ONLY to drm_util.h
2019-01-14 10:58:37 +01:00
drm/scheduler: Add drm_sched_suspend/resume_timeout()
2018-12-05 17:56:16 -05:00
drm/i915: Split audio component to a generic type
2018-07-17 22:25:19 +02:00
x86/gpu: reserve ICL's graphics stolen memory
2018-07-10 16:28:47 -07:00
drm/i915/aml: Add new Amber Lake PCI ID
2018-10-11 10:59:34 -07:00
drm: include kernel.h and agp_backend.h from intel-gtt.h
2019-01-02 11:37:47 +02:00
drm: move amd_gpu_scheduler into common location
2017-12-07 11:51:56 -05:00
e02f5c1bb2