kernel/linux.git/drivers/gpu/host1x/bus.c, branch v4.14.286

gpu: host1x: Detach driver on unregister

2020-07-22T07:22:15+00:00

[ Upstream commit d9a0a05bf8c76e6dc79230669a8b5d685b168c30 ] Currently when a host1x device driver is unregistered, it is not detached from the host1x controller, which means that the device will stay around and when the driver is registered again, it may bind to the old, stale device rather than the new one that was created from scratch upon driver registration. This in turn can cause various weird crashes within the driver core because it is confronted with a device that was already deleted. Fix this by detaching the driver from the host1x controller when it is unregistered. This ensures that the deleted device also is no longer present in the device list that drivers will bind to. Reported-by: Sowjanya Komatineni Signed-off-by: Thierry Reding Tested-by: Sowjanya Komatineni Signed-off-by: Thierry Reding Signed-off-by: Sasha Levin

Merge tag 'drm/tegra/for-4.14-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next

2017-08-21T07:37:33+00:00

drm/tegra: Changes for v4.14-rc1 This contains a couple of fixes and improvements for host1x, with some preparatory work for Tegra186 support. The remainder is cleanup and minor bugfixes for Tegra DRM along with enhancements to debuggability. There have also been some enhancements to the kernel interfaces for host1x job submissions and support for mmap'ing PRIME buffers directly, all of which get the interfaces very close to ready for serious work. * tag 'drm/tegra/for-4.14-rc1' of git://anongit.freedesktop.org/tegra/linux: (21 commits) drm/tegra: Prevent BOs from being freed during job submission drm/tegra: gem: Implement mmap() for PRIME buffers drm/tegra: Support render node drm/tegra: sor: Trace register accesses drm/tegra: dpaux: Trace register accesses drm/tegra: dsi: Trace register accesses drm/tegra: hdmi: Trace register accesses drm/tegra: dc: Trace register accesses drm/tegra: sor: Use unsigned int for register offsets drm/tegra: hdmi: Use unsigned int for register offsets drm/tegra: dsi: Use unsigned int for register offsets drm/tegra: dpaux: Use unsigned int for register offsets drm/tegra: dc: Use unsigned int for register offsets drm/tegra: Fix NULL deref in debugfs/iova drm/tegra: switch to drm_*_get(), drm_*_put() helpers drm/tegra: Set MODULE_FIRMWARE for the VIC drm/tegra: Add CONFIG_OF dependency gpu: host1x: Support sub-devices recursively gpu: host1x: fix error return code in host1x_probe() gpu: host1x: Fix bitshift/mask multipliers ...

gpu: host1x: Support sub-devices recursively

2017-08-17T15:57:08+00:00

The display architecture in Tegra186 changes slightly compared to earlier Tegra generations, which requires that we recursively scan host1x sub-devices from device tree. Signed-off-by: Thierry Reding

gpu/host1x: Remove excess parameter in host1x_subdev_add docs

2017-07-31T12:24:37+00:00

Fixes the following warning when building docs: ../drivers/gpu/host1x/bus.c:50: warning: Excess function parameter 'driver' description in 'host1x_subdev_add' Signed-off-by: Sean Paul Signed-off-by: Thierry Reding Link: https://patchwork.freedesktop.org/patch/msgid/20170720174746.29100-4-seanpaul@chromium.org

gpu: host1x: Flesh out kerneldoc

2017-06-15T11:58:43+00:00

Improve kerneldoc for the public parts of the host1x infrastructure in preparation for adding driver-specific part to the GPU documentation. Acked-by: Daniel Vetter Signed-off-by: Thierry Reding

gpu: host1x: Fix host1x driver shutdown

2017-04-05T16:11:50+00:00

Shutting down a host1x device currently crashes if the device has failed to probe. The root cause is that the host1x shutdown is implemented as a struct bus_type callback, but in turn relies on the driver bound to the device. On failure to probe, no driver will be bound and cause the code to crash. Fix this by moving the ->probe(), ->remove() and ->shutdown() callbacks to the driver rather than the bus. Signed-off-by: Thierry Reding

gpu: host1x: Set OF node for new host1x devices

2017-01-30T10:47:44+00:00

We use the OF node of the host1x device's parent because it's the closest we have. Signed-off-by: Thierry Reding

Merge tag 'drm/tegra/for-4.6-rc1' of http://anongit.freedesktop.org/git/tegra/linux into drm-next

2016-03-16T22:08:57+00:00

drm/tegra: Changes for v4.6-rc1 Only two cleanups this time around. One fixes reference counting of device tree nodes, the other changes the return value of a function from an unsigned int to an int to reflect that it will return error codes. * tag 'drm/tegra/for-4.6-rc1' of http://anongit.freedesktop.org/git/tegra/linux: gpu: host1x: Use a signed return type for do_relocs() gpu: host1x: bus: Add missing of_node_put()

gpu: host1x: bus: Add missing of_node_put()

2016-03-16T12:45:43+00:00

for_each_child_of_node() performs an of_node_get() on each iteration, so to break out of the loop an of_node_put() is required. Found using Coccinelle. The semantic patch used for this is as follows: // @@ expression e; local idexpression n; @@ for_each_child_of_node(..., n) { ... when != of_node_put(n) when != e = n ( return n; | + of_node_put(n); ? return ...; ) ... } // Signed-off-by: Amitoj Kaur Chawla Signed-off-by: Thierry Reding

gpu: host1x: Set DMA ops on device creation

2016-03-04T15:24:57+00:00

Currently host1x-instanciated devices have their dma_ops left to NULL, which makes any DMA operation (like buffer import) on ARM64 fallback to the dummy_dma_ops and fail with an error. This patch calls of_dma_configure() with the host1x node when creating such a device, so the proper DMA operations are set. Suggested-by: Thierry Reding Signed-off-by: Alexandre Courbot Signed-off-by: Thierry Reding