From patchwork Tue Jan 25 05:50:06 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kai-Heng Feng X-Patchwork-Id: 537431 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BBF9AC433F5 for ; Tue, 25 Jan 2022 05:55:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240127AbiAYFzX (ORCPT ); Tue, 25 Jan 2022 00:55:23 -0500 Received: from smtp-relay-canonical-0.canonical.com ([185.125.188.120]:41768 "EHLO smtp-relay-canonical-0.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232834AbiAYFuj (ORCPT ); Tue, 25 Jan 2022 00:50:39 -0500 Received: from HP-EliteBook-840-G7.. (36-229-235-192.dynamic-ip.hinet.net [36.229.235.192]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-canonical-0.canonical.com (Postfix) with ESMTPSA id 4CB1E41971; Tue, 25 Jan 2022 05:50:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1643089819; bh=RBL3u5Tqk5g5Q6E9j56HHXuKIz8pK3AeEUukCQO8les=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=dx7t82GBaQk17v3cVY+6IE05160OLSh+1QKnqfLzaGDf1heNdPBHAuI6cyRnODbjG oJVFz8einLVAoDuwnYqgSvLX7tPRhFBdeIf07YyP8S+PBjvZAKa87k7u4bWjXmySos iYS48UWm7UKW9tmmKhYv88jL0i4WwNTWhiOb2zA3rBYFm8ysZtNRW3OVqdHqro+kA+ PUWTUmtoV7Ko8qNWaoY9ugth3qwKvG2GToRGL/uCbmTBdBXDDwfBd1ygIc5hqqY1Vf 6xtKEuxjm+mM/IhZZC+ms8NCuq6dhHH2N1vl2AjHe3imgs5imVJhMfF75QiSLrwABa fUZHMlEWm9Ydg== From: Kai-Heng Feng To: arnd@arndb.de, gregkh@linuxfoundation.org, ulf.hansson@linaro.org Cc: linux-pm@vger.kernel.org, Kai-Heng Feng , Ricky WU , Thomas Hebb , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v6 1/4] mmc: rtsx: Use pm_runtime_{get,put}() to handle runtime PM Date: Tue, 25 Jan 2022 13:50:06 +0800 Message-Id: <20220125055010.1866563-1-kai.heng.feng@canonical.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20220121014039.1693208-1-kai.heng.feng@canonical.com> References: <20220121014039.1693208-1-kai.heng.feng@canonical.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org Commit 5b4258f6721f ("misc: rtsx: rts5249 support runtime PM") doesn't use pm_runtime_{get,put}() helpers when it should, so the RPM refcount keeps at zero, hence its parent driver, rtsx_pci, has to do lots of weird tricks to keep it from runtime suspending. So use those helpers at right places to properly manage runtime PM. Fixes: 5b4258f6721f ("misc: rtsx: rts5249 support runtime PM") Cc: Ricky WU Signed-off-by: Kai-Heng Feng --- v6: - Change the auto suspend delay to 200ms as Realtek suggested. v5: - Revert back to v3 as Realtek suggested. v4: - Decrease the autosuspend delay to 200ms for more power saving. v3: v2: - No change. drivers/mmc/host/rtsx_pci_sdmmc.c | 44 +++++++++++++++++++++++-------- 1 file changed, 33 insertions(+), 11 deletions(-) diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c index 58cfaffa3c2d8..2a3f14afe9f83 100644 --- a/drivers/mmc/host/rtsx_pci_sdmmc.c +++ b/drivers/mmc/host/rtsx_pci_sdmmc.c @@ -806,6 +806,7 @@ static void sd_request(struct work_struct *work) struct mmc_request *mrq = host->mrq; struct mmc_command *cmd = mrq->cmd; struct mmc_data *data = mrq->data; + struct device *dev = &host->pdev->dev; unsigned int data_size = 0; int err; @@ -822,6 +823,7 @@ static void sd_request(struct work_struct *work) } mutex_lock(&pcr->pcr_mutex); + pm_runtime_get_sync(dev); rtsx_pci_start_run(pcr); @@ -858,6 +860,8 @@ static void sd_request(struct work_struct *work) data->bytes_xfered = data->blocks * data->blksz; } + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); mutex_unlock(&pcr->pcr_mutex); finish: @@ -1080,6 +1084,7 @@ static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) { struct realtek_pci_sdmmc *host = mmc_priv(mmc); struct rtsx_pcr *pcr = host->pcr; + struct device *dev = &host->pdev->dev; if (host->eject) return; @@ -1088,6 +1093,7 @@ static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) return; mutex_lock(&pcr->pcr_mutex); + pm_runtime_get_sync(dev); rtsx_pci_start_run(pcr); @@ -1121,6 +1127,8 @@ static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) rtsx_pci_switch_clock(pcr, ios->clock, host->ssc_depth, host->initial_mode, host->double_clk, host->vpclk); + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); mutex_unlock(&pcr->pcr_mutex); } @@ -1128,6 +1136,7 @@ static int sdmmc_get_ro(struct mmc_host *mmc) { struct realtek_pci_sdmmc *host = mmc_priv(mmc); struct rtsx_pcr *pcr = host->pcr; + struct device *dev = &host->pdev->dev; int ro = 0; u32 val; @@ -1135,6 +1144,7 @@ static int sdmmc_get_ro(struct mmc_host *mmc) return -ENOMEDIUM; mutex_lock(&pcr->pcr_mutex); + pm_runtime_get_sync(dev); rtsx_pci_start_run(pcr); @@ -1144,6 +1154,8 @@ static int sdmmc_get_ro(struct mmc_host *mmc) if (val & SD_WRITE_PROTECT) ro = 1; + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); mutex_unlock(&pcr->pcr_mutex); return ro; @@ -1153,6 +1165,7 @@ static int sdmmc_get_cd(struct mmc_host *mmc) { struct realtek_pci_sdmmc *host = mmc_priv(mmc); struct rtsx_pcr *pcr = host->pcr; + struct device *dev = &host->pdev->dev; int cd = 0; u32 val; @@ -1160,6 +1173,7 @@ static int sdmmc_get_cd(struct mmc_host *mmc) return cd; mutex_lock(&pcr->pcr_mutex); + pm_runtime_get_sync(dev); rtsx_pci_start_run(pcr); @@ -1169,6 +1183,8 @@ static int sdmmc_get_cd(struct mmc_host *mmc) if (val & SD_EXIST) cd = 1; + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); mutex_unlock(&pcr->pcr_mutex); return cd; @@ -1251,6 +1267,7 @@ static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) { struct realtek_pci_sdmmc *host = mmc_priv(mmc); struct rtsx_pcr *pcr = host->pcr; + struct device *dev = &host->pdev->dev; int err = 0; u8 voltage; @@ -1265,6 +1282,7 @@ static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) return err; mutex_lock(&pcr->pcr_mutex); + pm_runtime_get_sync(dev); rtsx_pci_start_run(pcr); @@ -1294,6 +1312,8 @@ static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) err = rtsx_pci_write_register(pcr, SD_BUS_STAT, SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0); + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); mutex_unlock(&pcr->pcr_mutex); return err; @@ -1303,6 +1323,7 @@ static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode) { struct realtek_pci_sdmmc *host = mmc_priv(mmc); struct rtsx_pcr *pcr = host->pcr; + struct device *dev = &host->pdev->dev; int err = 0; if (host->eject) @@ -1313,6 +1334,7 @@ static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode) return err; mutex_lock(&pcr->pcr_mutex); + pm_runtime_get_sync(dev); rtsx_pci_start_run(pcr); @@ -1345,6 +1367,8 @@ static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode) err = sd_change_phase(host, DDR50_RX_PHASE(pcr), true); out: + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); mutex_unlock(&pcr->pcr_mutex); return err; @@ -1495,12 +1519,12 @@ static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev) realtek_init_host(host); - if (pcr->rtd3_en) { - pm_runtime_set_autosuspend_delay(&pdev->dev, 5000); - pm_runtime_use_autosuspend(&pdev->dev); - pm_runtime_enable(&pdev->dev); - } - + pm_runtime_no_callbacks(&pdev->dev); + pm_runtime_set_active(&pdev->dev); + pm_runtime_enable(&pdev->dev); + pm_runtime_set_autosuspend_delay(&pdev->dev, 200); + pm_runtime_mark_last_busy(&pdev->dev); + pm_runtime_use_autosuspend(&pdev->dev); mmc_add_host(mmc); @@ -1521,11 +1545,6 @@ static int rtsx_pci_sdmmc_drv_remove(struct platform_device *pdev) pcr->slots[RTSX_SD_CARD].card_event = NULL; mmc = host->mmc; - if (pcr->rtd3_en) { - pm_runtime_dont_use_autosuspend(&pdev->dev); - pm_runtime_disable(&pdev->dev); - } - cancel_work_sync(&host->work); mutex_lock(&host->host_mutex); @@ -1548,6 +1567,9 @@ static int rtsx_pci_sdmmc_drv_remove(struct platform_device *pdev) flush_work(&host->work); + pm_runtime_dont_use_autosuspend(&pdev->dev); + pm_runtime_disable(&pdev->dev); + mmc_free_host(mmc); dev_dbg(&(pdev->dev),