From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from fllnx209.ext.ti.com ([198.47.19.16]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1cONQS-0007BD-Pl for linux-mtd@lists.infradead.org; Tue, 03 Jan 2017 11:38:46 +0000 Subject: Re: [PATCH] mtd: davinci-nand: disable subpage write for davinci-nand To: Boris Brezillon References: <1457428095-2801-1-git-send-email-sushaanth.s@ti.com> <20170103095918.7da43be3@bbrezillon> CC: David Woodhouse , Brian Norris , , , , "Cooper Jr., Franklin" , Murali Karicheri From: Sekhar Nori Message-ID: Date: Tue, 3 Jan 2017 17:07:44 +0530 MIME-Version: 1.0 In-Reply-To: <20170103095918.7da43be3@bbrezillon> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi Boris, On Tuesday 03 January 2017 02:29 PM, Boris Brezillon wrote: > Hi Sushaanth, Sushaanth is not with TI anymore. You might have received a bounce. > > Sorry for the late reply, I'm dequeing old NAND related patches and > found this one. > > Is this patch still needed? I dont think so. I suspect the real root cause was addressed by Karl in commit f6d7c1b5598b ("mtd: nand: davinci: Reinitialize the HW ECC engine in 4bit hwctl") I just ran mtd_subpagetest on my da850 lcdk board and it passed[1]. If there are more tests to run to determine if subpage write really works, let me know too. I suspect even the original workaround for keystone boards may not be needed after Karl's patch. I will test and send a patch dropping the workaround altogether if the tests succeed. Thanks, Sekhar [1] # modprobe mtd_subpagetest dev=2 ================================================= mtd_subpagetest: MTD device: 2 mtd_subpagetest: MTD device size 536215552, eraseblock size 131072, page size 2048, subpage size 512, count of eraseblocks 4091, pages per eraseblock 64, OOB size 64 mtd_test: scanning for bad eraseblocks mtd_test: block 4087 is bad mtd_test: block 4088 is bad mtd_test: block 4089 is bad mtd_test: block 4090 is bad mtd_test: scanned 4091 eraseblocks, 4 are bad mtd_subpagetest: writing whole device mtd_subpagetest: written up to eraseblock 0 mtd_subpagetest: written up to eraseblock 256 mtd_subpagetest: written up to eraseblock 512 mtd_subpagetest: written up to eraseblock 768 mtd_subpagetest: written up to eraseblock 1024 mtd_subpagetest: written up to eraseblock 1280 mtd_subpagetest: written up to eraseblock 1536 mtd_subpagetest: written up to eraseblock 1792 mtd_subpagetest: written up to eraseblock 2048 mtd_subpagetest: written up to eraseblock 2304 mtd_subpagetest: written up to eraseblock 2560 mtd_subpagetest: written up to eraseblock 2816 mtd_subpagetest: written up to eraseblock 3072 mtd_subpagetest: written up to eraseblock 3328 mtd_subpagetest: written up to eraseblock 3584 mtd_subpagetest: written up to eraseblock 3840 mtd_subpagetest: written 4091 eraseblocks mtd_subpagetest: verifying all eraseblocks mtd_subpagetest: verified up to eraseblock 0 mtd_subpagetest: verified up to eraseblock 256 mtd_subpagetest: verified up to eraseblock 512 mtd_subpagetest: verified up to eraseblock 768 mtd_subpagetest: verified up to eraseblock 1024 mtd_subpagetest: verified up to eraseblock 1280 mtd_subpagetest: verified up to eraseblock 1536 mtd_subpagetest: verified up to eraseblock 1792 mtd_subpagetest: verified up to eraseblock 2048 mtd_subpagetest: verified up to eraseblock 2304 mtd_subpagetest: verified up to eraseblock 2560 mtd_subpagetest: verified up to eraseblock 2816 mtd_subpagetest: verified up to eraseblock 3072 mtd_subpagetest: verified up to eraseblock 3328 mtd_subpagetest: verified up to eraseblock 3584 mtd_subpagetest: verified up to eraseblock 3840 mtd_subpagetest: verified 4091 eraseblocks mtd_subpagetest: verifying all eraseblocks for 0xff mtd_subpagetest: verified up to eraseblock 0 mtd_subpagetest: verified up to eraseblock 256 mtd_subpagetest: verified up to eraseblock 512 mtd_subpagetest: verified up to eraseblock 768 mtd_subpagetest: verified up to eraseblock 1024 mtd_subpagetest: verified up to eraseblock 1280 mtd_subpagetest: verified up to eraseblock 1536 mtd_subpagetest: verified up to eraseblock 1792 mtd_subpagetest: verified up to eraseblock 2048 mtd_subpagetest: verified up to eraseblock 2304 mtd_subpagetest: verified up to eraseblock 2560 mtd_subpagetest: verified up to eraseblock 2816 mtd_subpagetest: verified up to eraseblock 3072 mtd_subpagetest: verified up to eraseblock 3328 mtd_subpagetest: verified up to eraseblock 3584 mtd_subpagetest: verified up to eraseblock 3840 mtd_subpagetest: verified 4091 eraseblocks mtd_subpagetest: writing whole device mtd_subpagetest: written up to eraseblock 0 mtd_subpagetest: written up to eraseblock 256 mtd_subpagetest: written up to eraseblock 512 mtd_subpagetest: written up to eraseblock 768 mtd_subpagetest: written up to eraseblock 1024 mtd_subpagetest: written up to eraseblock 1280 mtd_subpagetest: written up to eraseblock 1536 mtd_subpagetest: written up to eraseblock 1792 mtd_subpagetest: written up to eraseblock 2048 mtd_subpagetest: written up to eraseblock 2304 mtd_subpagetest: written up to eraseblock 2560 mtd_subpagetest: written up to eraseblock 2816 mtd_subpagetest: written up to eraseblock 3072 mtd_subpagetest: written up to eraseblock 3328 mtd_subpagetest: written up to eraseblock 3584 mtd_subpagetest: written up to eraseblock 3840 mtd_subpagetest: written 4091 eraseblocks mtd_subpagetest: verifying all eraseblocks mtd_subpagetest: verified up to eraseblock 0 mtd_subpagetest: verified up to eraseblock 256 mtd_subpagetest: verified up to eraseblock 512 mtd_subpagetest: verified up to eraseblock 768 mtd_subpagetest: verified up to eraseblock 1024 mtd_subpagetest: verified up to eraseblock 1280 mtd_subpagetest: verified up to eraseblock 1536 mtd_subpagetest: verified up to eraseblock 1792 mtd_subpagetest: verified up to eraseblock 2048 mtd_subpagetest: verified up to eraseblock 2304 mtd_subpagetest: verified up to eraseblock 2560 mtd_subpagetest: verified up to eraseblock 2816 mtd_subpagetest: verified up to eraseblock 3072 mtd_subpagetest: verified up to eraseblock 3328 mtd_subpagetest: verified up to eraseblock 3584 mtd_subpagetest: verified up to eraseblock 3840 mtd_subpagetest: verified 4091 eraseblocks mtd_subpagetest: verifying all eraseblocks for 0xff mtd_subpagetest: verified up to eraseblock 0 mtd_subpagetest: verified up to eraseblock 256 mtd_subpagetest: verified up to eraseblock 512 mtd_subpagetest: verified up to eraseblock 768 mtd_subpagetest: verified up to eraseblock 1024 mtd_subpagetest: verified up to eraseblock 1280 mtd_subpagetest: verified up to eraseblock 1536 mtd_subpagetest: verified up to eraseblock 1792 mtd_subpagetest: verified up to eraseblock 2048 mtd_subpagetest: verified up to eraseblock 2304 mtd_subpagetest: verified up to eraseblock 2560 mtd_subpagetest: verified up to eraseblock 2816 mtd_subpagetest: verified up to eraseblock 3072 mtd_subpagetest: verified up to eraseblock 3328 mtd_subpagetest: verified up to eraseblock 3584 mtd_subpagetest: verified up to eraseblock 3840 mtd_subpagetest: verified 4091 eraseblocks mtd_subpagetest: finished with 0 errors =================================================