From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9AE636FC9 for ; Sun, 17 Sep 2023 19:42:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C2073C433C8; Sun, 17 Sep 2023 19:42:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1694979763; bh=00sUMgE8xKk2JkTCi2ahUPktoCYAwPEI4tlDHuBhS2g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IOh5nDAxGHd7kYnQjag8qryDNQSwtS3zzkQF0bfrzYD/fBd25v9mrG7puzvGN26vL v9w5zznupU9CAJ6j6r5XcS54jm0pQX6RtUawH8PmzSztmmsoIiskr8IaVQLMt2Sj0e Xi9haEiTJ/h6561bqmX86c4beS9X7lD/K7Dk9C60= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Qiang Yu , Jeffrey Hugo , Manivannan Sadhasivam , Manivannan Sadhasivam , Sasha Levin Subject: [PATCH 5.10 389/406] bus: mhi: host: Skip MHI reset if device is in RDDM Date: Sun, 17 Sep 2023 21:14:03 +0200 Message-ID: <20230917191111.537670906@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230917191101.035638219@linuxfoundation.org> References: <20230917191101.035638219@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Qiang Yu [ Upstream commit cabce92dd805945a090dc6fc73b001bb35ed083a ] In RDDM EE, device can not process MHI reset issued by host. In case of MHI power off, host is issuing MHI reset and polls for it to get cleared until it times out. Since this timeout can not be avoided in case of RDDM, skip the MHI reset in this scenarios. Cc: Fixes: a6e2e3522f29 ("bus: mhi: core: Add support for PM state transitions") Signed-off-by: Qiang Yu Reviewed-by: Jeffrey Hugo Reviewed-by: Manivannan Sadhasivam Link: https://lore.kernel.org/r/1684390959-17836-1-git-send-email-quic_qianyu@quicinc.com Signed-off-by: Manivannan Sadhasivam Signed-off-by: Sasha Levin --- drivers/bus/mhi/host/pm.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/bus/mhi/host/pm.c b/drivers/bus/mhi/host/pm.c index 7d69b740b9f93..fe8ecd6eaa4d1 100644 --- a/drivers/bus/mhi/host/pm.c +++ b/drivers/bus/mhi/host/pm.c @@ -490,6 +490,10 @@ static void mhi_pm_disable_transition(struct mhi_controller *mhi_cntrl, u32 in_reset = -1; unsigned long timeout = msecs_to_jiffies(mhi_cntrl->timeout_ms); + /* Skip MHI RESET if in RDDM state */ + if (mhi_cntrl->rddm_image && mhi_get_exec_env(mhi_cntrl) == MHI_EE_RDDM) + goto skip_mhi_reset; + dev_dbg(dev, "Triggering MHI Reset in device\n"); mhi_set_mhi_state(mhi_cntrl, MHI_STATE_RESET); @@ -515,6 +519,7 @@ static void mhi_pm_disable_transition(struct mhi_controller *mhi_cntrl, mhi_write_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_INTVEC, 0); } +skip_mhi_reset: dev_dbg(dev, "Waiting for all pending event ring processing to complete\n"); mhi_event = mhi_cntrl->mhi_event; -- 2.40.1