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gpu: host1x: Refactor channel allocation code

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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 <mperttunen@nvidia.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Tested-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Mikko Perttunen 2017-06-15 02:18:42 +03:00 • committed by Thierry Reding
parent 03f0de770e
commit 8474b02531
10 changed files with 142 additions and 117 deletions
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1
include/linux/host1x.h
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@ -172,7 +172,6 @@ struct host1x_channel;
struct host1x_job;
struct host1x_channel *host1x_channel_request(struct device *dev);
void host1x_channel_free(struct host1x_channel *channel);
struct host1x_channel *host1x_channel_get(struct host1x_channel *channel);
void host1x_channel_put(struct host1x_channel *channel);
int host1x_job_submit(struct host1x_job *job);