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gpu: host1x: Program interrupt destinations on Tegra234

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On Tegra234, each Host1x VM has 8 interrupt lines. Each syncpoint
can be configured with which interrupt line should be used for
threshold interrupt, allowing for load balancing.

For now, to keep backwards compatibility, just set all syncpoints
to the first interrupt.

Bug 3724727

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Change-Id: I7058f9bd38bc59db83ee92613e4e733813db7a46
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2745954
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
Reviewed-by: Brad Griffis <bgriffis@nvidia.com>
Reviewed-by: Jonathan Hunter <jonathanh@nvidia.com>
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
GVS: Gerrit_Virtual_Submit
Tested-by: Brad Griffis <bgriffis@nvidia.com>
This commit is contained in:
Mikko Perttunen
2022-03-08 12:17:42 +02:00
committed by Laxman Dewangan
parent 3ce86b2740
commit 7771d25b9c
1 changed files with 11 additions and 0 deletions
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11
drivers/gpu/host1x/hw/intr_hw.c
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@@ -76,6 +76,17 @@ static void intr_hw_init(struct host1x *host, u32 cpm)
/* update host clocks per usec */
host1x_sync_writel(host, cpm, HOST1X_SYNC_USEC_CLK);
#endif
#if HOST1X_HW >= 8
u32 id;
/*
* Program threshold interrupt destination among 8 lines per VM,
* per syncpoint. For now, just direct all to the first interrupt
* line.
*/
for (id = 0; id < host->info->nb_pts; id++)
host1x_sync_writel(host, 0, HOST1X_SYNC_SYNCPT_INTR_DEST(id));
#endif
}
static int