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Thu, 02 Sep 2021 05:53:44 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 4CD80C43460; Thu, 2 Sep 2021 05:53:44 +0000 (UTC) Received: from mail.codeaurora.org (localhost.localdomain [127.0.0.1]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: mdalam) by smtp.codeaurora.org (Postfix) with ESMTPSA id 8A94DC4338F; Thu, 2 Sep 2021 05:53:43 +0000 (UTC) MIME-Version: 1.0 Date: Thu, 02 Sep 2021 11:23:43 +0530 From: mdalam@codeaurora.org To: Miquel Raynal Cc: mani@kernel.org, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, sricharan@codeaurora.org, stable@kernel.org Subject: Re: [PATCH V3] mtd: rawnand: qcom: Update code word value for raw read In-Reply-To: <20210901163615.090c6f24@xps13> References: <1630493613-8158-1-git-send-email-mdalam@codeaurora.org> <20210901163615.090c6f24@xps13> Message-ID: X-Sender: mdalam@codeaurora.org User-Agent: Roundcube Webmail/1.3.9 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210901_225403_215664_27803E99 X-CRM114-Status: GOOD ( 19.50 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org On 2021-09-01 20:06, Miquel Raynal wrote: > Md Sadre Alam wrote on Wed, 1 Sep 2021 > 16:23:33 +0530: > >> Fixes: 503ee5aa ("mtd: rawnand: qcom: update last code word register") >> Cc: stable@kernel.org >> Signed-off-by: Md Sadre Alam >> --- >> [V3] >> * Added Fixes tag >> * Removed change log from commit message. >> >> From QPIC V2 onwards there is a separate register to read >> last code word "QPIC_NAND_READ_LOCATION_LAST_CW_n". >> >> qcom_nandc_read_cw_raw() is used to read only one code word >> at a time. If we will configure number of code words to 1 in >> in QPIC_NAND_DEV0_CFG0 register then QPIC controller thinks >> its reading the last code word, since from QPIC V2 onwards >> we are having separate register to read the last code word, >> we have to configure "QPIC_NAND_READ_LOCATION_LAST_CW_n" >> register to fetch data from controller buffer to system >> memory. > > Really? > > It's not your first contribution, you know what a changelog is and what > a commit message is, right? So please, keep the commit message > ("why" your change is needed) where it was and only put > the changelog (the differences between two versions) below the three > dashes '---'. > Sorry for misinterpreting your comments. I have addressed your comment in patch V4 >> >> drivers/mtd/nand/raw/qcom_nandc.c | 8 ++++++-- >> 1 file changed, 6 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/mtd/nand/raw/qcom_nandc.c >> b/drivers/mtd/nand/raw/qcom_nandc.c >> index ef0bade..04e6f7b 100644 >> --- a/drivers/mtd/nand/raw/qcom_nandc.c >> +++ b/drivers/mtd/nand/raw/qcom_nandc.c >> @@ -1676,13 +1676,17 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, >> struct nand_chip *chip, >> struct nand_ecc_ctrl *ecc = &chip->ecc; >> int data_size1, data_size2, oob_size1, oob_size2; >> int ret, reg_off = FLASH_BUF_ACC, read_loc = 0; >> + int raw_cw = cw; >> >> nand_read_page_op(chip, page, 0, NULL, 0); >> host->use_ecc = false; >> >> + if (nandc->props->qpic_v2) >> + raw_cw = ecc->steps - 1; >> + >> clear_bam_transaction(nandc); >> set_address(host, host->cw_size * cw, page); >> - update_rw_regs(host, 1, true, cw); >> + update_rw_regs(host, 1, true, raw_cw); >> config_nand_page_read(chip); >> >> data_size1 = mtd->writesize - host->cw_size * (ecc->steps - 1); >> @@ -1711,7 +1715,7 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, >> struct nand_chip *chip, >> nandc_set_read_loc(chip, cw, 3, read_loc, oob_size2, 1); >> } >> >> - config_nand_cw_read(chip, false, cw); >> + config_nand_cw_read(chip, false, raw_cw); >> >> read_data_dma(nandc, reg_off, data_buf, data_size1, 0); >> reg_off += data_size1; ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/