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gpu: host1x: Increase pushbuffer slots to 1023

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To avoid CDMA waiting when many jobs are queued, double
pushbuffer size.

Bug 4386806

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Change-Id: I80841fdec96ba3c203c070bcc1f5c7fd1c3a7cbc
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3032829
(cherry picked from commit 281f74c323)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3152866
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Santosh BS <santoshb@nvidia.com>
This commit is contained in:
Mikko Perttunen
2023-12-12 10:12:27 +02:00
committed by mobile promotions
parent 3c87c18fcf
commit 386aa2f039
1 changed files with 5 additions and 5 deletions
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10
drivers/gpu/host1x/cdma.c
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@@ -35,14 +35,14 @@
/* /*
* Typically the commands written into the push buffer are a pair of words. We * Typically the commands written into the push buffer are a pair of words. We
* use slots to represent each of these pairs and to simplify things. Note the * use slots to represent each of these pairs and to simplify things. Note the
* strange number of slots allocated here. 512 slots will fit exactly within a * strange number of slots allocated here. 1024 slots will fit exactly within a
* single memory page. We also need one additional word at the end of the push * two memory pages. We also need one additional word at the end of the push
* buffer for the RESTART opcode that will instruct the CDMA to jump back to * buffer for the RESTART opcode that will instruct the CDMA to jump back to
* the beginning of the push buffer. With 512 slots, this means that we'll use * the beginning of the push buffer. With 1024 slots, this means that we'll use
* 2 memory pages and waste 4092 bytes of the second page that will never be * 3 memory pages and waste 4092 bytes of the third page that will never be
* used. * used.
*/ */
#define HOST1X_PUSHBUFFER_SLOTS 511 #define HOST1X_PUSHBUFFER_SLOTS 1023
/* /*
* Clean up push buffer resources * Clean up push buffer resources