From 7afd1194a3cdb7ba5aa8d658b2d0655f61457c86 Mon Sep 17 00:00:00 2001 From: Mikko Perttunen Date: Mon, 27 Jun 2022 17:20:03 +0300 Subject: 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. Signed-off-by: Mikko Perttunen Signed-off-by: Thierry Reding --- drivers/gpu/host1x/hw/intr_hw.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'drivers/gpu') diff --git a/drivers/gpu/host1x/hw/intr_hw.c b/drivers/gpu/host1x/hw/intr_hw.c index f56375ee6e71..9acccdb139e6 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 -- cgit v1.2.3