From 7771d25b9c095f90f311bc4ae4e4e392a6cc94b9 Mon Sep 17 00:00:00 2001 From: Mikko Perttunen Date: Tue, 8 Mar 2022 12:17:42 +0200 Subject: [PATCH] gpu: host1x: Program interrupt destinations on Tegra234 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 Change-Id: I7058f9bd38bc59db83ee92613e4e733813db7a46 Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2745954 Reviewed-by: svc_kernel_abi Reviewed-by: Brad Griffis Reviewed-by: Jonathan Hunter Reviewed-by: Bibek Basu GVS: Gerrit_Virtual_Submit Tested-by: Brad Griffis --- drivers/gpu/host1x/hw/intr_hw.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/gpu/host1x/hw/intr_hw.c b/drivers/gpu/host1x/hw/intr_hw.c index f56375ee..9acccdb1 100644 --- a/drivers/gpu/host1x/hw/intr_hw.c +++ b/drivers/gpu/host1x/hw/intr_hw.c @@ -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