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[2a01:cb05:945b:7e00:9bdc:6887:23a2:4f31]) by smtp.gmail.com with ESMTPSA id by1-20020a056000098100b0033e18421618sm556093wrb.17.2024.03.15.16.44.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Mar 2024 16:44:47 -0700 (PDT) From: Romain Naour To: linux-omap@vger.kernel.org Cc: vigneshr@ti.com, adrian.hunter@intel.com, ulf.hansson@linaro.org, linux-mmc@vger.kernel.org, tony@atomide.com, Romain Naour Subject: [PATCH] mmc: sdhci-omap: re-tuning is needed after a pm transition to support emmc HS200 mode Date: Sat, 16 Mar 2024 00:44:44 +0100 Message-ID: <20240315234444.816978-1-romain.naour@smile.fr> X-Mailer: git-send-email 2.43.2 Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Romain Naour "PM runtime functions" has been added in sdhci-omap driver in 5.16 f433e8aac6b9 ("mmc: sdhci-omap: Implement PM runtime functions") along with "card power off and enable aggressive PM" 3edf588e7fe0 ("mmc: sdhci-omap: Allow SDIO card power off and enable aggressive PM"). Since then, the sdhci-omap driver doesn't work using mmc-hs200 mode due to the tuning values being lost during a pm transition. See the report on the linux-omap mailing list [1]. As for the sdhci_am654 driver, request a new tuning sequence before suspend (sdhci_omap_runtime_suspend()), othwerwise the device will thigger cache flush errors: mmc1: cache flush error -110 (ETIMEDOUT) mmc1: error -110 doing aggressive suspend followed by I/O errors produced by fdisk -l /dev/mmcblk1boot1: I/O error, dev mmcblk1boot0, sector 64384 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 I/O error, dev mmcblk1boot1, sector 64384 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 I/O error, dev mmcblk1boot1, sector 64384 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev mmcblk1boot1, logical block 8048, async page read I/O error, dev mmcblk1boot0, sector 64384 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev mmcblk1boot0, logical block 8048, async page read Don't re-tune if auto retuning is supported in HW (when SDHCI_TUNING_MODE_3 is available). [1] https://lore.kernel.org/all/2e5f1997-564c-44e4-b357-6343e0dae7ab@smile.fr Fixes: f433e8aac6b9 ("mmc: sdhci-omap: Implement PM runtime functions") Signed-off-by: Romain Naour Reviewed-by: Tony Lindgren Acked-by: Adrian Hunter --- drivers/mmc/host/sdhci-omap.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c index e78faef67d7a..94076b095571 100644 --- a/drivers/mmc/host/sdhci-omap.c +++ b/drivers/mmc/host/sdhci-omap.c @@ -1439,6 +1439,9 @@ static int __maybe_unused sdhci_omap_runtime_suspend(struct device *dev) struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); + if (host->tuning_mode != SDHCI_TUNING_MODE_3) + mmc_retune_needed(host->mmc); + if (omap_host->con != -EINVAL) sdhci_runtime_suspend_host(host);