Il 09/02/23 08:40, Tinghan Shen ha scritto:
The MT8195 SCP core 1 watchdog timeout needs to be handled in the
SCP core 0 IRQ handler because the MT8195 SCP core 1 watchdog timeout
IRQ is wired on the same IRQ entry for core 0 watchdog timeout.
MT8195 SCP has a watchdog status register to identify the watchdog
timeout source when IRQ triggered.
Signed-off-by: Tinghan Shen <tinghan.shen@xxxxxxxxxxxx>
---
drivers/remoteproc/mtk_common.h | 4 ++++
drivers/remoteproc/mtk_scp.c | 24 +++++++++++++++++++++++-
2 files changed, 27 insertions(+), 1 deletion(-)
diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
index e4ef97f2d3a1..ca2395b98d27 100644
--- a/drivers/remoteproc/mtk_common.h
+++ b/drivers/remoteproc/mtk_common.h
@@ -55,6 +55,10 @@
#define MT8192_CORE0_WDT_IRQ 0x10030
#define MT8192_CORE0_WDT_CFG 0x10034
+#define MT8195_SYS_STATUS 0x4004
+#define MT8195_CORE0_WDT BIT(16)
+#define MT8195_CORE1_WDT BIT(17)
+
#define MT8195_L1TCM_SRAM_PDN_RESERVED_RSI_BITS GENMASK(7, 4)
#define MT8195_CPU1_SRAM_PD 0x1084
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index cfcb719ba50b..9fbbc4751433 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -222,6 +222,28 @@ static void mt8192_scp_irq_handler(struct mtk_scp *scp)
}
}
+static void mt8195_scp_irq_handler(struct mtk_scp *scp)
Looking at the C1 interrupt handler, I don't see any WDT timeout handling, hence
a question naturally arises:
Would it ever be possible for *both* CORE0 and CORE1 WDT timeout to happen
at the same time?
Meaning that MT8195_SYS_STATUS has *both* CORE0_WDT and CORE1_WDT bits set when
we reach this interrupt handler?
In that case, the fix would be to just change....
+{
+ u32 scp_to_host;
+
+ scp_to_host = readl(scp->reg_base + MT8192_SCP2APMCU_IPC_SET);
+
+ if (scp_to_host & MT8192_SCP_IPC_INT_BIT) {
+ scp_ipi_handler(scp);
+ } else {
+ u32 reason = readl(scp->reg_base + MT8195_SYS_STATUS);
+
+ if (reason & MT8195_CORE1_WDT)
+ writel(1, scp->reg_base + MT8195_CORE1_WDT_IRQ);
+ else
...the 'else' to another conditional :-)
Regards,
Angelo
