kernel/drivers/gpu/host1x/hw/channel_hw.c, branch linux-4.17.y

gpu: host1x: Enable gather filter

2017-10-20T12:19:52Z

The gather filter is a feature present on Tegra124 and newer where the hardware prevents GATHERed command buffers from executing commands normally reserved for the CDMA pushbuffer which is maintained by the kernel driver. This commit enables the gather filter on all supporting hardware. Signed-off-by: Mikko Perttunen Reviewed-by: Dmitry Osipenko Signed-off-by: Thierry Reding

gpu: host1x: Enable Tegra186 syncpoint protection

2017-10-20T12:19:52Z

Since Tegra186 the Host1x hardware allows syncpoints to be assigned to specific channels, preventing any other channels from incrementing them. Enable this feature where available and assign syncpoints to channels when submitting a job. Syncpoints are currently never unassigned from channels since that would require extra work and is unnecessary with the current channel allocation model. Signed-off-by: Mikko Perttunen Reviewed-by: Dmitry Osipenko Signed-off-by: Thierry Reding

gpu: host1x: Refactor channel allocation code

2017-06-15T12:25:38Z

This is largely a rewrite of the Host1x channel allocation code, bringing several changes: - The previous code could deadlock due to an interaction between the 'reflock' mutex and CDMA timeout handling. This gets rid of the mutex. - Support for more than 32 channels, required for Tegra186 - General refactoring, including better encapsulation of channel ownership handling into channel.c Signed-off-by: Mikko Perttunen Reviewed-by: Dmitry Osipenko Tested-by: Dmitry Osipenko Signed-off-by: Thierry Reding

gpu: host1x: Whitespace cleanup for readability

2016-06-23T09:59:30Z

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: Use unsigned int consistently for IDs

2016-06-23T09:59:24Z

IDs can never be negative so use unsigned int. In some instances an explicitly sized type (such as u32) was used for no particular reason, so turn those into unsigned int as well for consistency. Signed-off-by: Thierry Reding

gpu: host1x: Use struct host1x_bo pointers in traces

2014-11-13T15:11:32Z

Rather than cast to a u32 use the struct host1x_bo pointers directly. This avoid annoying warnings for 64-bit builds. Signed-off-by: Thierry Reding

gpu: host1x: Add syncpoint base support

2013-10-31T08:55:48Z

This patch adds support for hardware syncpoint bases. This creates a simple mechanism to stall the command FIFO until an operation is completed. Signed-off-by: Arto Merilainen Reviewed-by: Terje Bergstrom Signed-off-by: Thierry Reding

gpu: host1x: Use relative include paths

2013-10-31T08:55:40Z

This is slightly safer than adding -Idrivers/gpu/host1x to cflags-y. Signed-off-by: Thierry Reding

gpu: host1x: Expose syncpt and channel functionality

2013-10-31T08:20:11Z

Expose the buffer objects, syncpoint and channel functionality in the public public header so that drivers can use them. Signed-off-by: Thierry Reding

gpu: host1x: Make host1x header file public

2013-10-31T08:20:10Z

In preparation to support host1x clients other than DRM, move this header into a public location. Signed-off-by: Thierry Reding