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gpu: nvgpu: Remove fixed wait time for change seq completion

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Currently after sending change seq RPC, nvgpu waits for a fixed time
of 20ms.
This CL replaces this with pmu_wait_message_cond, which will return
immediately after getting change seq completion event.
Also added debug fs node to get the change seq execution time.

Bug 200545366

Change-Id: Iba283f65d4949858be9cbff88de4d21a8c92ff81
Signed-off-by: Abdul Salam <absalam@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2202423
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Abdul Salam
2019-09-20 20:01:32 +05:30
committed by Alex Waterman
parent 8b575a3fff
commit 65ecd7a181
9 changed files with 41 additions and 1 deletions
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16
drivers/gpu/nvgpu/os/linux/debug_clk_tu104.c
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@@ -203,6 +203,20 @@ static const struct file_operations vftable_fops = {
.release = single_release,
};
static int tu104_change_seq_time(void *data , u64 *val)
{
struct gk20a *g = (struct gk20a *)data;
s64 readval;
if (!g->ops.clk.get_change_seq_time)
return -EINVAL;
g->ops.clk.get_change_seq_time(g, &readval);
*val = (u64)readval;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(change_seq_fops, tu104_change_seq_time, NULL, "%llu\n");
int tu104_clk_init_debugfs(struct gk20a *g)
{
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
@@ -226,6 +240,8 @@ int tu104_clk_init_debugfs(struct gk20a *g)
g, &xbar_cfc_fops);
d = debugfs_create_file("gpc", S_IRUGO | S_IWUSR, clk_freq_ctlr_root,
g, &gpc_cfc_fops);
d = debugfs_create_file("change_seq_time_us", S_IRUGO, clocks_root,
g, &change_seq_fops);
nvgpu_log(g, gpu_dbg_info, "g=%p", g);