linux-kernel - Re: [PATCH v6 2/2] remoteproc: mediatek: Support mt8186 scp

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Message-ID: <20220315151349.GA2479752@p14s>
Date:   Tue, 15 Mar 2022 09:13:49 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Allen-KH Cheng <allen-kh.cheng@...iatek.com>,
        angelogioacchino.delregno@...labora.com
Cc:     Ohad Ben-Cohen <ohad@...ery.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Tinghan Shen <tinghan.shen@...iatek.com>,
        Project_Global_Chrome_Upstream_Group@...iatek.com,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-remoteproc@...r.kernel.org
Subject: Re: [PATCH v6 2/2] remoteproc: mediatek: Support mt8186 scp

On Tue, Mar 15, 2022 at 08:47:47PM +0800, Allen-KH Cheng wrote:
> From: Allen-KH Cheng <Allen-KH.Cheng@...iatek.com>
> 
> Add SCP support for mt8186

V5 of this patchset is already in rproc-next and as such this one does not
apply.

> 
> Signed-off-by: Allen-KH Cheng <Allen-KH.Cheng@...iatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

As far as I can see from the mailing list interactions, Angelo did not review
the new section about cache initialisation and yet his RoB is present.  And to
make matters worse he was not on the recipient list, which I have corrected.

Thanks,
Mathieu

> ---
>  drivers/remoteproc/mtk_common.h |  3 +++
>  drivers/remoteproc/mtk_scp.c    | 42 +++++++++++++++++++++++++++++++++
>  2 files changed, 45 insertions(+)
> 
> diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
> index 5ff3867c72f3..71ce4977cb0b 100644
> --- a/drivers/remoteproc/mtk_common.h
> +++ b/drivers/remoteproc/mtk_common.h
> @@ -32,6 +32,9 @@
>  #define MT8183_SCP_CACHESIZE_8KB	BIT(8)
>  #define MT8183_SCP_CACHE_CON_WAYEN	BIT(10)
>  
> +#define MT8186_SCP_L1_SRAM_PD_P1	0x40B0
> +#define MT8186_SCP_L1_SRAM_PD_p2	0x40B4
> +
>  #define MT8192_L2TCM_SRAM_PD_0		0x10C0
>  #define MT8192_L2TCM_SRAM_PD_1		0x10C4
>  #define MT8192_L2TCM_SRAM_PD_2		0x10C8
> diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
> index dcddb33e9997..11be6b4235eb 100644
> --- a/drivers/remoteproc/mtk_scp.c
> +++ b/drivers/remoteproc/mtk_scp.c
> @@ -383,6 +383,35 @@ static void mt8192_power_off_sram(void __iomem *addr)
>  		writel(GENMASK(i, 0), addr);
>  }
>  
> +static int mt8186_scp_before_load(struct mtk_scp *scp)
> +{
> +	/* Clear SCP to host interrupt */
> +	writel(MT8183_SCP_IPC_INT_BIT, scp->reg_base + MT8183_SCP_TO_HOST);
> +
> +	/* Reset clocks before loading FW */
> +	writel(0x0, scp->reg_base + MT8183_SCP_CLK_SW_SEL);
> +	writel(0x0, scp->reg_base + MT8183_SCP_CLK_DIV_SEL);
> +
> +	/* Turn on the power of SCP's SRAM before using it. Enable 1 block per time*/
> +	mt8192_power_on_sram(scp->reg_base + MT8183_SCP_SRAM_PDN);
> +
> +	/* Initialize TCM before loading FW. */
> +	writel(0x0, scp->reg_base + MT8183_SCP_L1_SRAM_PD);
> +	writel(0x0, scp->reg_base + MT8183_SCP_TCM_TAIL_SRAM_PD);
> +	writel(0x0, scp->reg_base + MT8186_SCP_L1_SRAM_PD_P1);
> +	writel(0x0, scp->reg_base + MT8186_SCP_L1_SRAM_PD_p2);
> +
> +	/*
> +	 * Set I-cache and D-cache size before loading SCP FW.
> +	 * SCP SRAM logical address may change when cache size setting differs.
> +	 */
> +	writel(MT8183_SCP_CACHE_CON_WAYEN | MT8183_SCP_CACHESIZE_8KB,
> +	       scp->reg_base + MT8183_SCP_CACHE_CON);
> +	writel(MT8183_SCP_CACHESIZE_8KB, scp->reg_base + MT8183_SCP_DCACHE_CON);
> +
> +	return 0;
> +}
> +
>  static int mt8192_scp_before_load(struct mtk_scp *scp)
>  {
>  	/* clear SPM interrupt, SCP2SPM_IPC_CLR */
> @@ -874,6 +903,18 @@ static const struct mtk_scp_of_data mt8183_of_data = {
>  	.ipi_buf_offset = 0x7bdb0,
>  };
>  
> +static const struct mtk_scp_of_data mt8186_of_data = {
> +	.scp_clk_get = mt8195_scp_clk_get,
> +	.scp_before_load = mt8186_scp_before_load,
> +	.scp_irq_handler = mt8183_scp_irq_handler,
> +	.scp_reset_assert = mt8183_scp_reset_assert,
> +	.scp_reset_deassert = mt8183_scp_reset_deassert,
> +	.scp_stop = mt8183_scp_stop,
> +	.scp_da_to_va = mt8183_scp_da_to_va,
> +	.host_to_scp_reg = MT8183_HOST_TO_SCP,
> +	.host_to_scp_int_bit = MT8183_HOST_IPC_INT_BIT,
> +};
> +
>  static const struct mtk_scp_of_data mt8192_of_data = {
>  	.scp_clk_get = mt8192_scp_clk_get,
>  	.scp_before_load = mt8192_scp_before_load,
> @@ -900,6 +941,7 @@ static const struct mtk_scp_of_data mt8195_of_data = {
>  
>  static const struct of_device_id mtk_scp_of_match[] = {
>  	{ .compatible = "mediatek,mt8183-scp", .data = &mt8183_of_data },
> +	{ .compatible = "mediatek,mt8186-scp", .data = &mt8186_of_data },
>  	{ .compatible = "mediatek,mt8192-scp", .data = &mt8192_of_data },
>  	{ .compatible = "mediatek,mt8195-scp", .data = &mt8195_of_data },
>  	{},
> -- 
> 2.18.0
>