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 B39EF286D57; Wed, 28 Jan 2026 15:37:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769614628; cv=none; b=C9Xay5+UhsQZ2xl10hwn/EVrW9AwUITTuY/zK1v2oTMA+HDGcKXgC0iVrt5KpLTpsqmsckQ4KJj1y3cogWTRJknixNy5GpamQaWx0T+i5se96xyWndSVl6Nt7cK6a2k36bfOQmAVuQqjmPnIQKNpEfwn6e7Fgjih7IUiJf+6U20= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769614628; c=relaxed/simple; bh=zy5GJVsTOad7f/1P60JvZKoP6MiFmQ8FbQgmBsyzs94=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=PySCzv2yGxtwwB51U/frSmUF86gW22IlUGTGZwu1REO80qFbT6keEurrh4xX/1xpWCVfu1VyUgN6sFws7oVyUug82UUbVDlNBd9KpXpg/kHjFsRcM6EdRcluby34dE7D500TZUTk1HrnM22HlSV2K3p8XBz/fvQ3oMsIc8ofI40= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=XbKJDIhC; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="XbKJDIhC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3E5F9C16AAE; Wed, 28 Jan 2026 15:37:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1769614628; bh=zy5GJVsTOad7f/1P60JvZKoP6MiFmQ8FbQgmBsyzs94=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XbKJDIhCh+6expq97+nlHL4sAAjWcyX3t9o0c/EU8KA70g65lfDQsW734jDwb/W81 x6JOw2pu/5EZlID8KTtumOZeGhtSQYV0ffzLsPOqScSsa1bsdf1cYMz0QTmY5B5eYZ 6NPQKw9A7RoNUBkZec4N0kxTrsAqmJZIZS3CZdgM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Matthew Schwartz , Ricky WU , Ulf Hansson Subject: [PATCH 6.6 194/254] mmc: rtsx_pci_sdmmc: implement sdmmc_card_busy function Date: Wed, 28 Jan 2026 16:22:50 +0100 Message-ID: <20260128145351.778906771@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260128145344.698118637@linuxfoundation.org> References: <20260128145344.698118637@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Matthew Schwartz commit 122610220134b32c742cc056eaf64f7017ac8cd9 upstream. rtsx_pci_sdmmc does not have an sdmmc_card_busy function, so any voltage switches cause a kernel warning, "mmc0: cannot verify signal voltage switch." Copy the sdmmc_card_busy function from rtsx_pci_usb to rtsx_pci_sdmmc to fix this. Fixes: ff984e57d36e ("mmc: Add realtek pcie sdmmc host driver") Signed-off-by: Matthew Schwartz Tested-by: Ricky WU Reviewed-by: Ricky WU Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/host/rtsx_pci_sdmmc.c | 41 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) --- a/drivers/mmc/host/rtsx_pci_sdmmc.c +++ b/drivers/mmc/host/rtsx_pci_sdmmc.c @@ -1307,6 +1307,46 @@ out: return err; } +static int sdmmc_card_busy(struct mmc_host *mmc) +{ + struct realtek_pci_sdmmc *host = mmc_priv(mmc); + struct rtsx_pcr *pcr = host->pcr; + int err; + u8 stat; + u8 mask = SD_DAT3_STATUS | SD_DAT2_STATUS | SD_DAT1_STATUS + | SD_DAT0_STATUS; + + mutex_lock(&pcr->pcr_mutex); + + rtsx_pci_start_run(pcr); + + err = rtsx_pci_write_register(pcr, SD_BUS_STAT, + SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, + SD_CLK_TOGGLE_EN); + if (err) + goto out; + + mdelay(1); + + err = rtsx_pci_read_register(pcr, SD_BUS_STAT, &stat); + if (err) + goto out; + + err = rtsx_pci_write_register(pcr, SD_BUS_STAT, + SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0); +out: + mutex_unlock(&pcr->pcr_mutex); + + if (err) + return err; + + /* check if any pin between dat[0:3] is low */ + if ((stat & mask) != mask) + return 1; + else + return 0; +} + static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode) { struct realtek_pci_sdmmc *host = mmc_priv(mmc); @@ -1405,6 +1445,7 @@ static const struct mmc_host_ops realtek .get_ro = sdmmc_get_ro, .get_cd = sdmmc_get_cd, .start_signal_voltage_switch = sdmmc_switch_voltage, + .card_busy = sdmmc_card_busy, .execute_tuning = sdmmc_execute_tuning, .init_sd_express = sdmmc_init_sd_express, };