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x86_64-redhat-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190808_232401_940261_22EDE1FA X-CRM114-Status: GOOD ( 22.29 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Miquel Raynal , s.hauer@pengutronix.de, Michael Nazzareno Trimarchi , linux-mtd@lists.infradead.org, Boris Brezillon Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org On Fri, 9 Aug 2019 15:20:52 +1000 Greg Ungerer wrote: > Hi Boris, > > On 9/8/19 2:36 am, Boris Brezillon wrote: > > On Mon, 5 Aug 2019 15:51:05 +1000 > > Greg Ungerer wrote: > >> On 2/8/19 10:51 pm, Boris Brezillon wrote: > >>> On Fri, 2 Aug 2019 22:34:57 +1000 > >>> Greg Ungerer wrote: > >>>> On 31/7/19 4:28 pm, Boris Brezillon wrote: > >>>>> On Wed, 31 Jul 2019 12:05:44 +1000 > >>>>> Greg Ungerer wrote: > >>>>>> On 30/7/19 6:38 pm, Miquel Raynal wrote: > >>>>>>> Greg Ungerer wrote on Tue, 30 Jul 2019 16:06:55 +1000: > >>>>>>>> On 30/7/19 10:41 am, Greg Ungerer wrote: > >>>>>>>>> On 30/7/19 10:28 am, Greg Ungerer wrote: > >>>>>>>>>> On 29/7/19 10:47 pm, Miquel Raynal wrote: > >>>>>>>>>>> Greg Ungerer wrote on Mon, 29 Jul 2019 22:33:56 +1000: > >>>>>>>>>>>> On 29/7/19 6:36 pm, Miquel Raynal wrote: > >>>>>>>>>>>>> Greg Ungerer wrote on Mon, 29 Jul 2019 16:41:51 +1000: > >>>>>>>>> [snip] > >>>>>> Note that this was generated on a normal boot up (not failure). > >>>>> > >>>>> The values looks good. Can you try with the below diff applied? > >>>>> --->8--- > >>>>> diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c > >>>>> index 334fe3130285..9771f6a82abe 100644 > >>>>> --- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c > >>>>> +++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c > >>>>> @@ -721,12 +721,10 @@ static void gpmi_nfc_apply_timings(struct gpmi_nand_data *this) > >>>>> writel(hw->ctrl1n, gpmi_regs + HW_GPMI_CTRL1_SET); > >>>>> > >>>>> /* Wait 64 clock cycles before using the GPMI after enabling the DLL */ > >>>>> - dll_wait_time_us = USEC_PER_SEC / hw->clk_rate * 64; > >>>>> - if (!dll_wait_time_us) > >>>>> - dll_wait_time_us = 1; > >>>>> + dll_wait_time_us = DIV_ROUND_UP(USEC_PER_SEC * 64, hw->clk_rate); > >>>>> > >>>>> /* Wait for the DLL to settle. */ > >>>>> - udelay(dll_wait_time_us); > >>>>> + usleep_range(dll_wait_time_us, dll_wait_time_us * 10); > >>>>> } > >>>>> > >>>>> static int gpmi_setup_data_interface(struct nand_chip *chip, int chipnr, > >>>> > >>>> Eventually it failed, in the same way with with same errors. > >>>> Took quite a while, over 600 boot cycles. > >>>> > >>>> Note also that I had to hand merge the changes, since in 5.1.14 that > >>>> gpmi_nfc_apply_timings() is in gpmi-lib.c. But it was trivial to do. > >>> > >>> Oh well. I guess the next thing to do would be to dump the timing regs > >>> and clk rate that are set by the bootloader (before the driver override > >>> them) or those applied by an older kernel (one that didn't have that > >>> issue). > >> > >> Is this useful? > > > > Hm, looks like it's configured in mode 0, so no, it's not super useful. > > Can you try booting an older kernel (one that didn't have the > > ->setup_data_interface() hook implemented). > > Ok. I went back from 5.1 and the first kernel I could find that > returned no grep hits for "setup_data_interface" was 4.16. > > So I built for my target with that and added similar trace to dump > the hardware register settings for that. Debug output looks like > this now for it: > > ... > drivers/mtd/nand/gpmi-nand/gpmi-nand.c(807): gpmi_get_clks() > clk_get_rate(r->clock[0])=22000000 > drivers/mtd/nand/gpmi-nand/gpmi-lib.c(1054): gpmi_begin() > HW_GPMI_TIMING0=0x00010203 > HW_GPMI_TIMING1=0x05000000 > nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xda > nand: Micron MT29F2G08ABAEAWP > nand: 256 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64 > drivers/mtd/nand/gpmi-nand/gpmi-lib.c(966): enable_edo_mode() > clk_get_rate(r->clock[0])=99000000 > gpmi-nand 1806000.gpmi-nand: enable the asynchronous EDO mode 5 > drivers/mtd/nand/gpmi-nand/gpmi-lib.c(1054): gpmi_begin() > HW_GPMI_TIMING0=0x00010101 TIMING0 match the one you have with 5.1 kernels. > HW_GPMI_TIMING1=0x90000000 And we even have a bigger timeout value in 5.1 (0xe0000000), so we should be all safe WRT to timings in TIMING{0,1}. Can you dump CTRL1? > Scanning device for bad blocks > 5 ofpart partitions found on MTD device gpmi-nand > Creating 5 MTD partitions on "gpmi-nand": > 0x000000000000-0x000000500000 : "u-boot" > 0x000000500000-0x000000600000 : "u-boot-env" > 0x000000600000-0x000000800000 : "log" > 0x000000800000-0x000010000000 : "flash" > 0x000000000000-0x000010000000 : "all" > gpmi-nand 1806000.gpmi-nand: driver registered. > ... > ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/