From: Greg Ungerer <gerg@kernel.org>
To: Boris Brezillon <boris.brezillon@collabora.com>
Cc: s.hauer@pengutronix.de, Boris Brezillon <bbrezillon@kernel.org>,
linux-mtd@lists.infradead.org,
Michael Nazzareno Trimarchi <michael@amarulasolutions.com>,
Miquel Raynal <miquel.raynal@bootlin.com>
Subject: Re: GPMI iMX6ull timeout on DMA
Date: Mon, 5 Aug 2019 15:51:05 +1000 [thread overview]
Message-ID: <b739696d-bb1d-bb04-cd45-3019712e29ad@kernel.org> (raw)
In-Reply-To: <20190802145109.00c4a4eb@collabora.com>
[-- Attachment #1: Type: text/plain, Size: 3937 bytes --]
Hi Boris,
On 2/8/19 10:51 pm, Boris Brezillon wrote:
> On Fri, 2 Aug 2019 22:34:57 +1000
> Greg Ungerer <gerg@kernel.org> wrote:
>> On 31/7/19 4:28 pm, Boris Brezillon wrote:
>>> On Wed, 31 Jul 2019 12:05:44 +1000
>>> Greg Ungerer <gerg@kernel.org> wrote:
>>>> On 30/7/19 6:38 pm, Miquel Raynal wrote:
>>>>> Greg Ungerer <gerg@kernel.org> 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 <gerg@kernel.org> wrote on Mon, 29 Jul 2019 22:33:56 +1000:
>>>>>>>>>> On 29/7/19 6:36 pm, Miquel Raynal wrote:
>>>>>>>>>>> Greg Ungerer <gerg@kernel.org> 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?
With attached patch, I get the following dump of the timing
settings in use:
...
drivers/mtd/nand/raw/gpmi-nand/gpmi-lib.c(490): gpmi_nfc_apply_timings()
HW_GPMI_TIMING0=0x00010203 (calculated=0x00020101)
HW_GPMI_TIMING1=0x00000000 (calculated=0x60000000)
HW_GPMI_CTRL1_SET=0x01c4000c (calculated=0x00000000)
r->clock[0]=22000000 (calculated=22000000)
random: fast init done
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/raw/gpmi-nand/gpmi-lib.c(490): gpmi_nfc_apply_timings()
HW_GPMI_TIMING0=0x00010203 (calculated=0x00020101)
HW_GPMI_TIMING1=0x00000000 (calculated=0xb0000000)
HW_GPMI_CTRL1_SET=0x01c4000c (calculated=0x00000000)
r->clock[0]=22000000 (calculated=22000000)
drivers/mtd/nand/raw/gpmi-nand/gpmi-lib.c(490): gpmi_nfc_apply_timings()
HW_GPMI_TIMING0=0x00010203 (calculated=0x00010101)
HW_GPMI_TIMING1=0x00000000 (calculated=0xe0000000)
HW_GPMI_CTRL1_SET=0x01c4000c (calculated=0x00c28000)
r->clock[0]=22000000 (calculated=100000000)
Scanning device for bad blocks
5 fixed-partitions 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.
...
Regards
Greg
[-- Attachment #2: gpmi-nand-default-timing.patch --]
[-- Type: text/x-patch, Size: 1042 bytes --]
--- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-lib.c 2019-03-06 15:47:24.310993476 +1000
+++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-lib.c 2019-08-05 15:04:49.241345883 +1000
@@ -486,6 +486,14 @@
void __iomem *gpmi_regs = r->gpmi_regs;
unsigned int dll_wait_time_us;
+#if 1
+ printk("%s(%d): gpmi_nfc_apply_timings()\n", __FILE__, __LINE__);
+ printk(" HW_GPMI_TIMING0=0x%08x (calculated=0x%08x)\n", readl(gpmi_regs + HW_GPMI_TIMING0), hw->timing0);
+ printk(" HW_GPMI_TIMING1=0x%08x (calculated=0x%08x)\n", readl(gpmi_regs + HW_GPMI_TIMING1), hw->timing1);
+ printk(" HW_GPMI_CTRL1_SET=0x%08x (calculated=0x%08x)\n", readl(gpmi_regs + HW_GPMI_CTRL1_SET), hw->ctrl1n);
+ printk(" r->clock[0]=%d (calculated=%d)\n", clk_get_rate(r->clock[0]), hw->clk_rate);
+#endif
+#if 0
clk_set_rate(r->clock[0], hw->clk_rate);
writel(hw->timing0, gpmi_regs + HW_GPMI_TIMING0);
@@ -505,6 +513,7 @@
/* Wait for the DLL to settle. */
udelay(dll_wait_time_us);
+#endif
}
int gpmi_setup_data_interface(struct nand_chip *chip, int chipnr,
[-- Attachment #3: Type: text/plain, Size: 144 bytes --]
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next prev parent reply other threads:[~2019-08-05 5:52 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-29 6:41 GPMI iMX6ull timeout on DMA Greg Ungerer
2019-07-29 8:36 ` Miquel Raynal
2019-07-29 8:42 ` Michael Nazzareno Trimarchi
2019-07-29 12:18 ` Greg Ungerer
2019-07-29 12:20 ` Michael Nazzareno Trimarchi
2019-07-29 12:33 ` Greg Ungerer
2019-07-29 12:47 ` Miquel Raynal
2019-07-29 12:49 ` Michael Nazzareno Trimarchi
2019-07-29 12:55 ` Miquel Raynal
2019-07-29 13:00 ` Michael Nazzareno Trimarchi
2019-07-29 13:22 ` Miquel Raynal
2019-07-29 20:00 ` Michael Nazzareno Trimarchi
2019-07-29 21:02 ` Miquel Raynal
2019-07-30 0:28 ` Greg Ungerer
2019-07-30 0:41 ` Greg Ungerer
2019-07-30 6:06 ` Greg Ungerer
2019-07-30 8:38 ` Miquel Raynal
2019-07-30 8:58 ` Boris Brezillon
2019-07-31 2:05 ` Greg Ungerer
2019-07-31 6:28 ` Boris Brezillon
2019-08-02 7:19 ` Greg Ungerer
2019-08-02 12:34 ` Greg Ungerer
2019-08-02 12:51 ` Boris Brezillon
2019-08-05 5:51 ` Greg Ungerer [this message]
2019-08-07 16:05 ` Miquel Raynal
2019-08-08 0:43 ` Greg Ungerer
2019-08-08 16:36 ` Boris Brezillon
2019-08-09 5:20 ` Greg Ungerer
2019-08-09 6:23 ` Boris Brezillon
2019-08-09 6:55 ` Greg Ungerer
2019-08-09 7:32 ` Boris Brezillon
2019-08-09 13:57 ` Greg Ungerer
2019-08-09 13:59 ` Boris Brezillon
2019-08-12 2:50 ` Greg Ungerer
2019-08-12 4:04 ` Greg Ungerer
2019-08-12 7:31 ` Boris Brezillon
2019-08-13 0:50 ` Greg Ungerer
2021-01-28 9:45 ` Michael Nazzareno Trimarchi
2021-01-28 10:26 ` Miquel Raynal
2021-01-28 10:35 ` Michael Nazzareno Trimarchi
2021-01-28 11:55 ` Michael Nazzareno Trimarchi
2021-01-29 12:43 ` Greg Ungerer
2021-01-30 9:41 ` Michael Nazzareno Trimarchi
2021-02-01 14:13 ` Miquel Raynal
2021-02-01 14:32 ` Michael Nazzareno Trimarchi
2021-02-01 15:08 ` Michael Nazzareno Trimarchi
2021-02-01 15:14 ` Miquel Raynal
2021-02-01 15:17 ` Michael Nazzareno Trimarchi
2021-10-15 20:05 ` Michael Trimarchi
2021-10-15 20:12 ` Michael Nazzareno Trimarchi
2021-10-18 7:19 ` Miquel Raynal
2021-10-18 7:33 ` Michael Nazzareno Trimarchi
2021-10-18 7:43 ` Miquel Raynal
2021-10-04 5:54 ` Christian Eggers
2021-10-04 6:27 ` Michael Nazzareno Trimarchi
2021-10-04 15:33 ` Miquel Raynal
2021-10-04 16:06 ` Han Xu
2021-10-05 6:02 ` Christian Eggers
2021-10-08 9:55 ` Christian Eggers
2021-10-08 12:08 ` Stefan Riedmüller
2021-10-08 12:27 ` Miquel Raynal
2021-10-08 13:11 ` Christian Eggers
2021-10-08 13:29 ` Miquel Raynal
2021-10-08 13:36 ` Miquel Raynal
2021-10-08 13:49 ` Christian Eggers
2021-10-08 16:07 ` Miquel Raynal
2021-10-09 5:53 ` Michael Nazzareno Trimarchi
2021-10-11 6:46 ` Miquel Raynal
2021-10-12 9:02 ` [RFC PATCH 1/2] mtd: rawnand: gpmi: Remove explicit default gpmi clock setting for i.MX6 Stefan Riedmueller
2021-10-12 9:02 ` [RFC PATCH 2/2] gpmi-nand: Add ERR007117 protection for nfc_apply_timings Stefan Riedmueller
2021-10-13 5:01 ` Han Xu
2021-10-22 8:45 ` Stefan Riedmüller
2021-10-22 14:35 ` han.xu
2021-10-25 9:39 ` Stefan Riedmüller
2021-10-28 9:28 ` Stefan Riedmüller
2021-11-01 4:01 ` han.xu
2021-10-13 6:10 ` Christian Eggers
2021-10-13 6:00 ` [RFC PATCH 1/2] mtd: rawnand: gpmi: Remove explicit default gpmi clock setting for i.MX6 Christian Eggers
2021-10-09 6:26 ` GPMI iMX6ull timeout on DMA Christian Eggers
2021-10-13 6:15 ` Christian Eggers
2021-10-08 13:13 ` Christian Eggers
2021-10-08 13:30 ` Miquel Raynal
2021-10-09 6:33 ` Christian Eggers
-- strict thread matches above, loose matches on Subject: below --
2018-10-02 13:22 GPMI IMX6ull timeout on dma Michael Nazzareno Trimarchi
2018-10-04 14:36 ` Michael Nazzareno Trimarchi
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