From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> To: Tinghan Shen <tinghan.shen@mediatek.com>, Bjorn Andersson <andersson@kernel.org>, Mathieu Poirier <mathieu.poirier@linaro.org>, Rob Herring <robh+dt@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Matthias Brugger <matthias.bgg@gmail.com> Cc: linux-remoteproc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Project_Global_Chrome_Upstream_Group@mediatek.com Subject: Re: [PATCH v4 10/12] remoteproc: mediatek: Handle MT8195 SCP core 1 watchdog timeout Date: Thu, 9 Feb 2023 13:48:55 +0100 [thread overview] Message-ID: <5c677b40-7bbd-5d69-9f9b-4879c8aeddf8@collabora.com> (raw) In-Reply-To: <20230209074021.13936-11-tinghan.shen@mediatek.com> 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@mediatek.com> > --- > 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
WARNING: multiple messages have this Message-ID (diff)
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> To: Tinghan Shen <tinghan.shen@mediatek.com>, Bjorn Andersson <andersson@kernel.org>, Mathieu Poirier <mathieu.poirier@linaro.org>, Rob Herring <robh+dt@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Matthias Brugger <matthias.bgg@gmail.com> Cc: linux-remoteproc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Project_Global_Chrome_Upstream_Group@mediatek.com Subject: Re: [PATCH v4 10/12] remoteproc: mediatek: Handle MT8195 SCP core 1 watchdog timeout Date: Thu, 9 Feb 2023 13:48:55 +0100 [thread overview] Message-ID: <5c677b40-7bbd-5d69-9f9b-4879c8aeddf8@collabora.com> (raw) In-Reply-To: <20230209074021.13936-11-tinghan.shen@mediatek.com> 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@mediatek.com> > --- > 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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2023-02-09 12:49 UTC|newest] Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-02-09 7:40 [PATCH v4 00/12] Add support for MT8195 SCP 2nd core Tinghan Shen 2023-02-09 7:40 ` Tinghan Shen 2023-02-09 7:40 ` [PATCH v4 01/12] dt-bindings: remoteproc: mediatek: Improve the rpmsg subnode definition Tinghan Shen 2023-02-09 7:40 ` Tinghan Shen 2023-02-09 19:02 ` Rob Herring 2023-02-09 19:02 ` Rob Herring 2023-02-09 7:40 ` [PATCH v4 02/12] arm64: dts: mediatek: mt8183-kukui: Update the node name of SCP rpmsg subnode Tinghan Shen 2023-02-09 7:40 ` Tinghan Shen 2023-02-09 7:40 ` [PATCH v4 03/12] dt-bindings: remoteproc: mediatek: Support MT8195 dual-core SCP Tinghan Shen 2023-02-09 7:40 ` Tinghan Shen 2023-02-09 19:05 ` Rob Herring 2023-02-09 19:05 ` Rob Herring 2023-02-09 7:40 ` [PATCH v4 04/12] remoteproc: mediatek: Add SCP core 1 register definitions Tinghan Shen 2023-02-09 7:40 ` Tinghan Shen 2023-02-09 7:40 ` [PATCH v4 05/12] remoteproc: mediatek: Add MT8195 SCP core 1 operations Tinghan Shen 2023-02-09 7:40 ` Tinghan Shen 2023-02-09 7:40 ` [PATCH v4 06/12] remoteproc: mediatek: Extract remoteproc initialization flow Tinghan Shen 2023-02-09 7:40 ` Tinghan Shen 2023-02-09 12:43 ` AngeloGioacchino Del Regno 2023-02-09 12:43 ` AngeloGioacchino Del Regno 2023-02-09 7:40 ` [PATCH v4 07/12] remoteproc: mediatek: Probe multi-core SCP Tinghan Shen 2023-02-09 7:40 ` Tinghan Shen 2023-02-09 12:41 ` AngeloGioacchino Del Regno 2023-02-09 12:41 ` AngeloGioacchino Del Regno 2023-02-09 7:40 ` [PATCH v4 08/12] remoteproc: mediatek: Control SCP core 1 by rproc subdevice Tinghan Shen 2023-02-09 7:40 ` Tinghan Shen 2023-02-09 7:40 ` [PATCH v4 09/12] remoteproc: mediatek: Setup MT8195 SCP core 1 SRAM offset Tinghan Shen 2023-02-09 7:40 ` Tinghan Shen 2023-02-09 7:40 ` [PATCH v4 10/12] remoteproc: mediatek: Handle MT8195 SCP core 1 watchdog timeout Tinghan Shen 2023-02-09 7:40 ` Tinghan Shen 2023-02-09 12:48 ` AngeloGioacchino Del Regno [this message] 2023-02-09 12:48 ` AngeloGioacchino Del Regno 2023-02-10 3:24 ` TingHan Shen (沈廷翰) 2023-02-10 3:24 ` TingHan Shen (沈廷翰) 2023-02-09 7:40 ` [PATCH v4 11/12] remoteproc: mediatek: Refine ipi handler error message Tinghan Shen 2023-02-09 7:40 ` Tinghan Shen 2023-02-09 7:40 ` [PATCH v4 12/12] arm64: dts: mediatek: mt8195: Add SCP 2nd core Tinghan Shen 2023-02-09 7:40 ` Tinghan Shen
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