From patchwork Tue Jul 7 21:31:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Poirier X-Patchwork-Id: 11650321 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6DB4060D for ; Tue, 7 Jul 2020 21:31:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 54D4E20720 for ; Tue, 7 Jul 2020 21:31:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="GZsKvRtt" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729317AbgGGVbX (ORCPT ); Tue, 7 Jul 2020 17:31:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33534 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729314AbgGGVbW (ORCPT ); Tue, 7 Jul 2020 17:31:22 -0400 Received: from mail-pj1-x1044.google.com (mail-pj1-x1044.google.com [IPv6:2607:f8b0:4864:20::1044]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 70BDEC08C5DC for ; Tue, 7 Jul 2020 14:31:22 -0700 (PDT) Received: by mail-pj1-x1044.google.com with SMTP id cv18so1295419pjb.1 for ; Tue, 07 Jul 2020 14:31:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=+3MCXBkEweRCBCXnKkbvCmuaqKQRYPJZEhIYqjzffxA=; b=GZsKvRttTVdpRXiFAFQqLB/OSr1mbj6jtRxZCmNENnI2UyhGQ97vFRT73Rf53p1Pw/ 7Kv8tMfvl8SbjnJPz7hAgz2qL96nPrs5yxXLMJaXlz7IDv1viQhZd5q0U8gi1u8EUQ62 I3TVIossUE8jTwWxWgD3bsaOGbA/z9LMxoQ1RVCFvVOP/kwVl80fSm3NS2bfjRNX73i5 bdPpi2ievzipfaZk06WjSrTQJs4zFvIv59xVdtWnb2usDFSd5y4yaBg4OjVK3udXkBWE 2yxbDGZ3Dbrv8WUhnmw9rQ/MqxfPgtE9PcZDdqSPjpPydg8wkR+dBP+gnZG2cTMr4D3Z xctg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=+3MCXBkEweRCBCXnKkbvCmuaqKQRYPJZEhIYqjzffxA=; b=ne4QQ7reLUE49eCD19k0Hmq9LLYhNEtjd+vleHKgECdjTYCTHomHEkIr2eUr6xEmK8 lAFfY2aF6IERvo/mBqzAADqVBkghzkfapj9ZfDBXc5EnU6awWUSyH3PkLdq4WaK4IMCi Y1ODGM/iNJz+s1rGuLIzdG5Gbfl21C03q8QKN1n49y8PzLqi7uxs/SVGIOcmS2U5v5ug Lg9Cr+lIWyJJnHGNgquGP6g42oGZikSkt3Cc+WWhC1U/d4YTA/xn7dGJno1wzlngY48Y d0/mp/LHpwFhLOkmsuoG8JrSaUAB7m5nQ3/lq/CaSA53NYktzM4oIkfh+1yHy4W3AdcQ IYng== X-Gm-Message-State: AOAM533Ksf0Xhc8hBq+KkWxatmK+BvUViX9z0MxtGdHShOt9Bs0xx5qD iRqDzHHPUN7akt0AGkb1ur7KhA== X-Google-Smtp-Source: ABdhPJzK/vQWGHOgnTL/Tw1JIjnDO3iSBBS4unWLbbvc5+fevfix2oAOiUFAwNtcZMZEixXYa9AjMQ== X-Received: by 2002:a17:902:c411:: with SMTP id k17mr44127764plk.165.1594157482000; Tue, 07 Jul 2020 14:31:22 -0700 (PDT) Received: from xps15.cg.shawcable.net (S0106002369de4dac.cg.shawcable.net. [68.147.8.254]) by smtp.gmail.com with ESMTPSA id o128sm23560832pfg.127.2020.07.07.14.31.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Jul 2020 14:31:21 -0700 (PDT) From: Mathieu Poirier To: ohad@wizery.com, bjorn.andersson@linaro.org, loic.pallardy@st.com, arnaud.pouliquen@st.com, mcoquelin.stm32@gmail.com, alexandre.torgue@st.com Cc: linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com Subject: [PATCH v5 06/11] remoteproc: stm32: Properly set co-processor state when attaching Date: Tue, 7 Jul 2020 15:31:07 -0600 Message-Id: <20200707213112.928383-7-mathieu.poirier@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200707213112.928383-1-mathieu.poirier@linaro.org> References: <20200707213112.928383-1-mathieu.poirier@linaro.org> MIME-Version: 1.0 Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org Introduce the required mechanic to set the state of the M4 in order to properly deal with scenarios where the co-processor has been started by another entity. Mainly based on the work published by Arnaud Pouliquen [1]. [1]. https://patchwork.kernel.org/project/linux-remoteproc/list/?series=239877 Signed-off-by: Mathieu Poirier Reviewed-by: Bjorn Andersson Reported-by: kernel test robot --- drivers/remoteproc/stm32_rproc.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c index 961a53f67ec5..cbeb5ceb15c5 100644 --- a/drivers/remoteproc/stm32_rproc.c +++ b/drivers/remoteproc/stm32_rproc.c @@ -39,6 +39,13 @@ #define STM32_MBX_VQ1_ID 1 #define STM32_MBX_SHUTDOWN "shutdown" +#define M4_STATE_OFF 0 +#define M4_STATE_INI 1 +#define M4_STATE_CRUN 2 +#define M4_STATE_CSTOP 3 +#define M4_STATE_STANDBY 4 +#define M4_STATE_CRASH 5 + struct stm32_syscon { struct regmap *map; u32 reg; @@ -636,12 +643,30 @@ static int stm32_rproc_parse_dt(struct platform_device *pdev, return 0; } +static int stm32_rproc_get_m4_status(struct stm32_rproc *ddata, + unsigned int *state) +{ + /* See stm32_rproc_parse_dt() */ + if (!ddata->m4_state.map) { + /* + * We couldn't get the coprocessor's state, assume + * it is not running. + */ + state = M4_STATE_OFF; + return 0; + } + + return regmap_read(ddata->m4_state.map, ddata->m4_state.reg, state); +} + + static int stm32_rproc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct stm32_rproc *ddata; struct device_node *np = dev->of_node; struct rproc *rproc; + unsigned int state; int ret; ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32)); @@ -664,6 +689,13 @@ static int stm32_rproc_probe(struct platform_device *pdev) if (ret) goto free_rproc; + ret = stm32_rproc_get_m4_status(ddata, &state); + if (ret) + goto free_rproc; + + if (state == M4_STATE_CRUN) + rproc->state = RPROC_DETACHED; + rproc->has_iommu = false; ddata->workqueue = create_workqueue(dev_name(dev)); if (!ddata->workqueue) {