linux-dev/drivers/gpu/host1x, branch linus/master

gpu: host1x: Add context bus

2022-06-01T09:50:42Z

The context bus is a "dummy" bus that contains struct devices that correspond to IOMMU contexts assigned through Host1x to processes. Even when host1x itself is built as a module, the bus is registered in built-in code so that the built-in ARM SMMU driver is able to reference it. Signed-off-by: Mikko Perttunen Signed-off-by: Thierry Reding

gpu: host1x: Show all allocated syncpts via debugfs

2022-04-06T13:33:57Z

When the host1x syncpts status is dumped via the debugfs, syncpts that have been allocated but not yet used are not shown and so currently it is not possible to see all the allocated syncpts. Update the path for dumping the syncpt status via the debugfs to show all allocated syncpts even if they have not been used yet. Note that when the syncpt status is dumped by the kernel itself for debugging only the active syncpt are shown. Signed-off-by: Jon Hunter Signed-off-by: Thierry Reding

gpu: host1x: Do not use mapping cache for job submissions

2022-04-06T13:12:36Z

Buffer mappings used in job submissions are usually small and not rapidly reused as opposed to framebuffers (which are usually large and rapidly reused, for example when page-flipping between double-buffered framebuffers). Avoid going through the mapping cache for these buffers since the cache would also lead to leaks if nobody is ever releasing the cache's last reference. For DRM/KMS these last references are dropped when the framebuffers are removed and therefore no longer needed. While at it, also add a note about the need to explicitly remove the final reference to the mapping in the cache. Reviewed-by: Jon Hunter Tested-by: Jon Hunter Signed-off-by: Thierry Reding

gpu: host1x: Fix a memory leak in 'host1x_remove()'

2022-03-01T10:13:09Z

Add a missing 'host1x_channel_list_free()' call in the remove function, as already done in the error handling path of the probe function. Fixes: 8474b02531c4 ("gpu: host1x: Refactor channel allocation code") Signed-off-by: Christophe JAILLET Signed-off-by: Thierry Reding

gpu: host1x: Fix an error handling path in 'host1x_probe()'

2022-03-01T10:13:03Z

Add the missing 'host1x_bo_cache_destroy()' call in the error handling path of the probe, as already done in the remove function. In order to simplify the error handling, move the 'host1x_bo_cache_init()' call after all the devm_ function. Fixes: 1f39b1dfa53c ("drm/tegra: Implement buffer object cache") Signed-off-by: Christophe JAILLET Signed-off-by: Thierry Reding

gpu: host1x: Always return syncpoint value when waiting

2022-02-16T16:20:53Z

The new TegraDRM UAPI uses syncpoint waiting with timeout set to zero to indicate reading the syncpoint value. To support that we need to return the syncpoint value always when waiting. Fixes: 44e961381354 ("drm/tegra: Implement syncpoint wait UAPI") Signed-off-by: Mikko Perttunen Signed-off-by: Thierry Reding

gpu: host1x: Fix hang on Tegra186+

2022-01-27T17:27:02Z

Tegra186+ hangs if host1x hardware is disabled at a kernel boot time because we touch hardware before runtime PM is resumed. Move sync point assignment initialization to the RPM-resume callback. Older SoCs were unaffected because they skip that sync point initialization. Tested-by: Jon Hunter # T186 Reported-by: Jon Hunter # T186 Fixes: 6b6776e2ab8a ("gpu: host1x: Add initial runtime PM and OPP support") Signed-off-by: Dmitry Osipenko Signed-off-by: Thierry Reding

gpu: host1x: Add back arm_iommu_detach_device()

2021-12-16T13:28:51Z

Host1x DMA buffer isn't mapped properly when CONFIG_ARM_DMA_USE_IOMMU=y. The memory management code of Host1x driver has a longstanding overhaul overdue and it's not obvious where the problem is in this case. Hence let's add back the old workaround which we already had sometime before. It explicitly detaches Host1x device from the offending implicit IOMMU domain. This fixes a completely broken Host1x DMA in case of ARM32 multiplatform kernel config. Cc: stable@vger.kernel.org Fixes: af1cbfb9bf0f ("gpu: host1x: Support DMA mapping of buffers") Signed-off-by: Dmitry Osipenko Signed-off-by: Thierry Reding

gpu: host1x: Add host1x_channel_stop()

2021-12-16T13:07:07Z

Add host1x_channel_stop() which waits till channel becomes idle and then stops the channel hardware. This is needed for supporting suspend/resume by host1x drivers since the hardware state is lost after power-gating, thus the channel needs to be stopped before client enters into suspend. Tested-by: Peter Geis # Ouya T30 Tested-by: Paul Fertser # PAZ00 T20 Tested-by: Nicolas Chauvet # PAZ00 T20 and TK1 T124 Tested-by: Matt Merhar # Ouya T30 Signed-off-by: Dmitry Osipenko Signed-off-by: Thierry Reding

gpu: host1x: Add initial runtime PM and OPP support

2021-12-16T13:07:07Z

Add runtime PM and OPP support to the Host1x driver. For the starter we will keep host1x always-on because dynamic power management require a major refactoring of the driver code since lot's of code paths are missing the RPM handling and we're going to remove some of these paths in the future. Reviewed-by: Ulf Hansson Tested-by: Peter Geis # Ouya T30 Tested-by: Paul Fertser # PAZ00 T20 Tested-by: Nicolas Chauvet # PAZ00 T20 and TK1 T124 Tested-by: Matt Merhar # Ouya T30 Signed-off-by: Dmitry Osipenko Signed-off-by: Thierry Reding