kernel/linux.git/drivers/gpu/drm/tegra/gem.c, branch v5.10.263

Merge tag 'drm-misc-next-2020-09-21' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

2020-09-22T23:52:24+00:00

drm-misc-next for 5.10: UAPI Changes: Cross-subsystem Changes: - virtio: Merged a PR for patches that will affect drm/virtio Core Changes: - dev: More devm_drm convertions and removal of drm_dev_init - atomic: Split out drm_atomic_helper_calc_timestamping_constants of drm_atomic_helper_update_legacy_modeset_state - ttm: More rework Driver Changes: - i915: selftests improvements - panfrost: support for Amlogic SoC - vc4: one fix - tree-wide: conversions to devm_drm_dev_alloc, - ast: simplifications of the atomic modesetting code - panfrost: multiple fixes - vc4: multiple fixes Signed-off-by: Dave Airlie From: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20200921152956.2gxnsdgxmwhvjyut@gilmour.lan

drm: tegra: fix common struct sg_table related issues

2020-09-10T06:18:35+00:00

The Documentation/DMA-API-HOWTO.txt states that the dma_map_sg() function returns the number of the created entries in the DMA address space. However the subsequent calls to the dma_sync_sg_for_{device,cpu}() and dma_unmap_sg must be called with the original number of the entries passed to the dma_map_sg(). struct sg_table is a common structure used for describing a non-contiguous memory buffer, used commonly in the DRM and graphics subsystems. It consists of a scatterlist with memory pages and DMA addresses (sgl entry), as well as the number of scatterlist entries: CPU pages (orig_nents entry) and DMA mapped pages (nents entry). It turned out that it was a common mistake to misuse nents and orig_nents entries, calling DMA-mapping functions with a wrong number of entries or ignoring the number of mapped entries returned by the dma_map_sg() function. To avoid such issues, lets use a common dma-mapping wrappers operating directly on the struct sg_table objects and use scatterlist page iterators where possible. This, almost always, hides references to the nents and orig_nents entries, making the code robust, easier to follow and copy/paste safe. Signed-off-by: Marek Szyprowski Reviewed-by: Robin Murphy

drm: allow limiting the scatter list size.

2020-09-09T05:58:56+00:00

Add drm_device argument to drm_prime_pages_to_sg(), so we can call dma_max_mapping_size() to figure the segment size limit and call into __sg_alloc_table_from_pages() with the correct limit. This fixes virtio-gpu with sev. Possibly it'll fix other bugs too given that drm seems to totaly ignore segment size limits so far ... v2: place max_segment in drm driver not gem object. v3: move max_segment next to the other gem fields. v4: just use dma_max_mapping_size(). Signed-off-by: Gerd Hoffmann Reviewed-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20200907112425.15610-2-kraxel@redhat.com

drm/tegra: remove _unlocked suffix in drm_gem_object_put_unlocked

2020-05-19T21:31:35+00:00

Spelling out _unlocked for each and every driver is a annoying. Especially if we consider how many drivers, do not know (or need to) about the horror stories involving struct_mutex. Just drop the suffix. It makes the API cleaner. Done via the following script: __from=drm_gem_object_put_unlocked __to=drm_gem_object_put for __file in $(git grep --name-only $__from); do sed -i "s/$__from/$__to/g" $__file; done Cc: Thierry Reding Cc: David Airlie Cc: Daniel Vetter Signed-off-by: Emil Velikov Acked-by: Sam Ravnborg Acked-by: Thierry Reding Acked-by: Thomas Zimmermann Link: https://patchwork.freedesktop.org/patch/msgid/20200515095118.2743122-32-emil.l.velikov@gmail.com

Merge tag 'drm/tegra/for-5.6-rc1-fixes' of git://anongit.freedesktop.org/tegra/linux into drm-next

2020-02-07T02:22:30+00:00

drm/tegra: Fixes for v5.6-rc1 These are a couple of quick fixes for regressions that were found during the first two weeks of the merge window. Signed-off-by: Dave Airlie From: Thierry Reding Link: https://patchwork.freedesktop.org/patch/msgid/20200206172753.2185390-1-thierry.reding@gmail.com

drm/tegra: Reuse IOVA mapping where possible

2020-02-06T17:21:55+00:00

This partially reverts the DMA API support that was recently merged because it was causing performance regressions on older Tegra devices. Unfortunately, the cache maintenance performed by dma_map_sg() and dma_unmap_sg() causes performance to drop by a factor of 10. The right solution for this would be to cache mappings for buffers per consumer device, but that's a bit involved. Instead, we simply revert to the old behaviour of sharing IOVA mappings when we know that devices can do so (i.e. they share the same IOMMU domain). Cc: # v5.5 Reported-by: Dmitry Osipenko Signed-off-by: Thierry Reding Tested-by: Dmitry Osipenko Reviewed-by: Dmitry Osipenko

Merge tag 'drm-misc-next-2019-12-16' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

2019-12-17T12:57:54+00:00

drm-misc-next for v5.6: UAPI Changes: - Add support for DMA-BUF HEAPS. Cross-subsystem Changes: - mipi dsi definition updates, pulled into drm-intel as well. - Add lockdep annotations for dma_resv vs mmap_sem and fs_reclaim. - Remove support for dma-buf kmap/kunmap. - Constify fb_ops in all fbdev drivers, including drm drivers and drm-core, and media as well. Core Changes: - Small cleanups to ttm. - Fix SCDC definition. - Assorted cleanups to core. - Add todo to remove load/unload hooks, and use generic fbdev emulation. - Assorted documentation updates. - Use blocking ww lock in ttm fault handler. - Remove drm_fb_helper_fbdev_setup/teardown. - Warning fixes with W=1 for atomic. - Use drm_debug_enabled() instead of drm_debug flag testing in various drivers. - Fallback to nontiled mode in fbdev emulation when not all tiles are present. (Later on reverted) - Various kconfig indentation fixes in core and drivers. - Fix freeing transactions in dp-mst correctly. - Sean Paul is steping down as core maintainer. :-( - Add lockdep annotations for atomic locks vs dma-resv. - Prevent use-after-free for a bad job in drm_scheduler. - Fill out all block sizes in the P01x and P210 definitions. - Avoid division by zero in drm/rect, and fix bounds. - Add drm/rect selftests. - Add aspect ratio and alternate clocks for HDMI 4k modes. - Add todo for drm_framebuffer_funcs and fb_create cleanup. - Drop DRM_AUTH for prime import/export ioctls. - Clear DP-MST payload id tables downstream when initializating. - Fix for DSC throughput definition. - Add extra FEC definitions. - Fix fake offset in drm_gem_object_funs.mmap. - Stop using encoder->bridge in core directly - Handle bridge chaining slightly better. - Add backlight support to drm/panel, and use it in many panel drivers. - Increase max number of y420 modes from 128 to 256, as preparation to add the new modes. Driver Changes: - Small fixes all over. - Fix documentation in vkms. - Fix mmap_sem vs dma_resv in nouveau. - Small cleanup in komeda. - Add page flip support in gma500 for psb/cdv. - Add ddc symlink in the connector sysfs directory for many drivers. - Add support for analogic an6345, and fix small bugs in it. - Add atomic modesetting support to ast. - Fix radeon fault handler VMA race. - Switch udl to use generic shmem helpers. - Unconditional vblank handling for mcde. - Miscellaneous fixes to mcde. - Tweak debug output from komeda using debugfs. - Add gamma and color transform support to komeda for DOU-IPS. - Add support for sony acx424AKP panel. - Various small cleanups to gma500. - Use generic fbdev emulation in udl, and replace udl_framebuffer with generic implementation. - Add support for Logic PD Type 28 panel. - Use drm_panel_* wrapper functions in exynos/tegra/msm. - Add devicetree bindings for generic DSI panels. - Don't include drm_pci.h directly in many drivers. - Add support for begin/end_cpu_access in udmabuf. - Stop using drm_get_pci_dev in gma500 and mga200. - Fixes to UDL damage handling, and use dma_buf_begin/end_cpu_access. - Add devfreq thermal support to panfrost. - Fix hotplug with daisy chained monitors by removing VCPI when disabling topology manager. - meson: Add support for OSD1 plane AFBC commit. - Stop displaying garbage when toggling ast primary plane on/off. - More cleanups and fixes to UDL. - Add D32 suport to komeda. - Remove globle copy of drm_dev in gma500. - Add support for Boe Himax8279d MIPI-DSI LCD panel. - Add support for ingenic JZ4770 panel. - Small null pointer deference fix in ingenic. - Remove support for the special tfp420 driver, as there is a generic way to do it. Signed-off-by: Daniel Vetter From: Maarten Lankhorst Link: https://patchwork.freedesktop.org/patch/msgid/ba73535a-9334-5302-2e1f-5208bd7390bd@linux.intel.com

drm/tegra: gem: Remove premature import restrictions

2019-12-04T12:36:23+00:00

All the display related blocks on Tegra require contiguous memory. Using the DMA API, there is no knowing at import time which device will end up using the buffer, so it's not known whether or not an IOMMU will be used to map the buffer. Move the check for non-contiguous buffers/mappings to the tegra_dc_pin() function which is now the earliest point where it is known if a DMA BUF can be used by the given device or not. v2: add check for contiguous buffer/mapping in tegra_dc_pin() Reviewed-by: Daniel Vetter Signed-off-by: Thierry Reding

drm/tegra: gem: Properly pin imported buffers

2019-12-04T12:35:53+00:00

Buffers that are imported from a DMA-BUF don't have pages allocated with them. At the same time an SG table for them can't be derived using the DMA API helpers because the necessary information doesn't exist. However there's already an SG table that was created during import, so this can simply be duplicated. Signed-off-by: Thierry Reding

drm/tegra: Remove dma_buf->k(un)map

2019-11-25T21:36:14+00:00

No in-tree users left. Reviewed-by: Thierry Reding Tested-by: Thierry Reding Acked-by: Sumit Semwal Signed-off-by: Daniel Vetter Cc: Thierry Reding Cc: Jonathan Hunter Cc: linux-tegra@vger.kernel.org Link: https://patchwork.freedesktop.org/patch/msgid/20191118103536.17675-9-daniel.vetter@ffwll.ch