kernel/linux.git/drivers/gpu/host1x/dev.c, branch v4.12.9

gpu: host1x: Fix error handling

2017-06-15T12:06:49+00:00

If 'devm_reset_control_get' returns an error, then we erroneously return success because error code is taken from 'host->clk' instead of 'host->rst'. Fixes: b386c6b73ac6 ("gpu: host1x: Support module reset") Signed-off-by: Christophe JAILLET Reviewed-by: Mikko Perttunen Signed-off-by: Thierry Reding Link: http://patchwork.freedesktop.org/patch/msgid/20170410202922.17665-1-christophe.jaillet@wanadoo.fr

gpu: host1x: Support module reset

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

Newer versions of Tegra come with early boot software that aggressively puts various modules in reset. Add support to the host1x driver to take the module out of reset on probe, and assert reset on removal. Signed-off-by: Thierry Reding

gpu: host1x: Sort includes alphabetically

2017-04-05T16:11:49+00:00

Sorting includes alphabetically makes it easier and less conflict-prone to add new includes subsequently. Signed-off-by: Thierry Reding

gpu: host1x: Add IOMMU support

2017-04-05T16:11:43+00:00

Add support for the Host1x unit to be located behind an IOMMU. This is required when gather buffers may be allocated non-contiguously in physical memory, as can be the case when TegraDRM is also using the IOMMU. Signed-off-by: Mikko Perttunen Signed-off-by: Thierry Reding

gpu: host1x: Whitespace cleanup for readability

2016-06-23T09:59:30+00:00

Insert a number of blank lines in places where they increase readability of the code. Also collapse various variable declarations to shorten some functions and finally rewrite some code for readability. Signed-off-by: Thierry Reding

gpu: host1x: Fix a couple of checkpatch warnings

2016-06-23T09:59:28+00:00

Fix a couple of occurrences where no blank line was used to separate variable declarations from code or where block comments were wrongly formatted. Signed-off-by: Thierry Reding

gpu: host1x: Set DMA mask

2016-03-04T15:24:56+00:00

The default DMA mask covers a 32 bits address range, but host1x devices can address a larger range on TK1 and TX1. Set the DMA mask to the range addressable when we use the IOMMU to prevent the use of bounce buffers. Signed-off-by: Alexandre Courbot Signed-off-by: Thierry Reding

gpu: host1x: Add Tegra210 support

2015-12-14T09:50:33+00:00

The host1x unit found in Tegra210 SoCs is very similar to the unit in Tegra124, but it has 2 additional channels for a total of 14 channels. Signed-off-by: Thierry Reding

gpu: host1x: Use platform_register/unregister_drivers()

2015-12-14T09:50:32+00:00

These new helpers simplify implementing multi-driver modules and properly handle failure to register one driver by unregistering all previously registered drivers. Signed-off-by: Thierry Reding

gpu: host1x: Provide a proper struct bus_type

2015-01-27T09:09:14+00:00

Previously the struct bus_type exported by the host1x infrastructure was only a very basic skeleton. Turn that implementation into a more full- fledged bus to support proper probe ordering and power management. Note that the bus infrastructure needs to be available before any of the drivers can be registered. This is automatically ensured if all drivers are built as loadable modules (via symbol dependencies). If all drivers are built-in there are no such guarantees and the link order determines the initcall ordering. Adjust drivers/gpu/Makefile to make sure that the host1x bus infrastructure is initialized prior to any of its users (only drm/tegra currently). v2: Fix building host1x and tegra-drm as modules Reported-by: Dave Airlie Reviewed-by: Sean Paul Reviewed-by: Mark Zhang Signed-off-by: Thierry Reding