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From: Boris Brezillon <boris.brezillon@collabora.com>
To: Greg Ungerer <gerg@kernel.org>
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: Wed, 31 Jul 2019 08:28:23 +0200
Message-ID: <20190731082823.6284f5a9@collabora.com> (raw)
In-Reply-To: <0a6afd79-d5ca-24da-a62c-11146a3522f6@kernel.org>

On Wed, 31 Jul 2019 12:05:44 +1000
Greg Ungerer <gerg@kernel.org> wrote:

> Hi Miquel, Boris,
> 
> 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]  
> >> Not sure if this is a useful data point... But I modified that
> >> nand_init_data_interface() loop to start checking from data mode 4.
> >> So now on every boot it defaults to mode 4. That has been running
> >> most of the day, up to 900 boot cycles now, no failures.  
> > 
> > Ok so after having chatted quite a bit with Boris, it is very likely
> > that, for these chips, the timings in mode 5 are too tight. It could
> > fail the GET_FEATURES once in mode 5. Can you please dump every single
> > intermediate value in gpmi_nfc_compute_timings() (period, *_cycles,
> > use of half pêriods, tRP, sample delay, etc) as well as the content
> > of /sys/kernel/debug/clk/clk_summary (you'll need debugfs support
> > enabled and mounted).
> > 
> > Also, can you be sure that the NAND chip is powered with 3.3V?  
> 
> Yes, 3.3V NAND chip.
> 
> Using the attached patch I get the following trace:
> 
> ...
> drivers/mtd/nand/raw/gpmi-nand/gpmi-lib.c(426): gpmi_nfc_compute_timings()
>    sdr->tBERS_max=65535000000
>    sdr->tCCS_min=500000000
>    sdr->tPROG_max=65535000000
>    sdr->tR_max=200000000000000
>    sdr->tALH_min=20000
>    sdr->tADL_min=400000
>    sdr->tALS_min=50000
>    sdr->tAR_min=25000
>    sdr->tCEA_max=100000
>    sdr->tCEH_min=20000
>    sdr->tCH_min=20000
>    sdr->tCHZ_max=100000
>    sdr->tCLH_min=20000
>    sdr->tCLR_min=20000
>    sdr->tCLS_min=50000
>    sdr->tCOH_min=0
>    sdr->tCS_min=70000
>    sdr->tDH_min=20000
>    sdr->tDS_min=40000
>    sdr->tFEAT_max=1000000
>    sdr->tIR_min=10000
>    sdr->tITC_max=1000000
>    sdr->tRC_min=100000
>    sdr->tREA_max=40000
>    sdr->tREH_min=30000
>    sdr->tRHOH_min=0
>    sdr->tRHW_min=200000
>    sdr->tRHZ_max=200000
>    sdr->tRLOH_min=0
>    sdr->tRP_min=50000
>    sdr->tRR_min=40000
>    sdr->tRST_max=250000000000
>    sdr->tWB_max=200000
>    sdr->tWC_min=100000
>    sdr->tWH_min=30000
>    sdr->tWHR_min=120000
>    sdr->tWP_min=50000
>    sdr->tWW_min=100000
>      hw->clk_rate=22000000
>      wrn_dly_sel=0
>      period_ps=45454
>      addr_setup_cycles=2
>      data_setup_cycles=1
>      data_hold_cycles=1
>      busy_timeout_cycles=31302
>      hw->timing0=0x00020101
>      hw->timing1=0x60000000
>      dll_threshold_ps=12000
>      use_half_period=1
>      reference_period_ps=22727
>      tRP_ps=45454
>      sample_delay_ps=4294955664
>      sample_delay_factor=0
>      hw->ctrl1n=0x00000000
>      hw->ctrl1n=0x00000000
> drivers/mtd/nand/raw/gpmi-nand/gpmi-lib.c(547): gpmi_nfc_apply_timings()
>    hw>clk_rate=22000000  
>    clk_set_rate(r->clock[0], hw->clk_rate)=0
>    clk_get_rate(r->clock[0])=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(426): gpmi_nfc_compute_timings()
>    sdr->tBERS_max=3000000000
>    sdr->tCCS_min=100000
>    sdr->tPROG_max=600000000
>    sdr->tR_max=25000000
>    sdr->tALH_min=20000
>    sdr->tADL_min=400000
>    sdr->tALS_min=50000
>    sdr->tAR_min=25000
>    sdr->tCEA_max=100000
>    sdr->tCEH_min=20000
>    sdr->tCH_min=20000
>    sdr->tCHZ_max=100000
>    sdr->tCLH_min=20000
>    sdr->tCLR_min=20000
>    sdr->tCLS_min=50000
>    sdr->tCOH_min=0
>    sdr->tCS_min=70000
>    sdr->tDH_min=20000
>    sdr->tDS_min=40000
>    sdr->tFEAT_max=1000000
>    sdr->tIR_min=10000
>    sdr->tITC_max=1000000
>    sdr->tRC_min=100000
>    sdr->tREA_max=40000
>    sdr->tREH_min=30000
>    sdr->tRHOH_min=0
>    sdr->tRHW_min=200000
>    sdr->tRHZ_max=200000
>    sdr->tRLOH_min=0
>    sdr->tRP_min=50000
>    sdr->tRR_min=40000
>    sdr->tRST_max=250000000000
>    sdr->tWB_max=200000
>    sdr->tWC_min=100000
>    sdr->tWH_min=30000
>    sdr->tWHR_min=120000
>    sdr->tWP_min=50000
>    sdr->tWW_min=100000
>      hw->clk_rate=22000000
>      wrn_dly_sel=0
>      period_ps=45454
>      addr_setup_cycles=2
>      data_setup_cycles=1
>      data_hold_cycles=1
>      busy_timeout_cycles=555
>      hw->timing0=0x00020101
>      hw->timing1=0xb0000000
>      dll_threshold_ps=12000
>      use_half_period=1
>      reference_period_ps=22727
>      tRP_ps=45454
>      sample_delay_ps=4294955664
>      sample_delay_factor=0
>      hw->ctrl1n=0x00000000
>      hw->ctrl1n=0x00000000
> drivers/mtd/nand/raw/gpmi-nand/gpmi-lib.c(547): gpmi_nfc_apply_timings()
>    hw>clk_rate=22000000  
>    clk_set_rate(r->clock[0], hw->clk_rate)=0
>    clk_get_rate(r->clock[0])=22000000
> gpmi-nand 1806000.gpmi-nand: use legacy bch geometry
> drivers/mtd/nand/raw/nand_base.c(913): checking mode=5
> drivers/mtd/nand/raw/nand_base.c(927): BREAKING AT  mode=5
> drivers/mtd/nand/raw/nand_base.c(932): chip->onfi_timing_mode_default=5
> drivers/mtd/nand/raw/gpmi-nand/gpmi-lib.c(426): gpmi_nfc_compute_timings()
>    sdr->tBERS_max=3000000000
>    sdr->tCCS_min=100000
>    sdr->tPROG_max=600000000
>    sdr->tR_max=25000000
>    sdr->tALH_min=5000
>    sdr->tADL_min=400000
>    sdr->tALS_min=10000
>    sdr->tAR_min=10000
>    sdr->tCEA_max=25000
>    sdr->tCEH_min=20000
>    sdr->tCH_min=5000
>    sdr->tCHZ_max=30000
>    sdr->tCLH_min=5000
>    sdr->tCLR_min=10000
>    sdr->tCLS_min=10000
>    sdr->tCOH_min=15000
>    sdr->tCS_min=15000
>    sdr->tDH_min=5000
>    sdr->tDS_min=7000
>    sdr->tFEAT_max=1000000
>    sdr->tIR_min=0
>    sdr->tITC_max=1000000
>    sdr->tRC_min=20000
>    sdr->tREA_max=16000
>    sdr->tREH_min=7000
>    sdr->tRHOH_min=15000
>    sdr->tRHW_min=100000
>    sdr->tRHZ_max=100000
>    sdr->tRLOH_min=5000
>    sdr->tRP_min=10000
>    sdr->tRR_min=20000
>    sdr->tRST_max=500000000
>    sdr->tWB_max=100000
>    sdr->tWC_min=20000
>    sdr->tWH_min=7000
>    sdr->tWHR_min=80000
>    sdr->tWP_min=10000
>    sdr->tWW_min=100000
>      hw->clk_rate=100000000
>      wrn_dly_sel=3
>      period_ps=10000
>      addr_setup_cycles=1
>      data_setup_cycles=1
>      data_hold_cycles=1
>      busy_timeout_cycles=2510
>      hw->timing0=0x00010101
>      hw->timing1=0xe0000000
>      dll_threshold_ps=12000
>      use_half_period=0
>      reference_period_ps=10000
>      tRP_ps=10000
>      sample_delay_ps=80000
>      sample_delay_factor=8
>      hw->ctrl1n=0x00c00000
>      hw->ctrl1n=0x00c28000
> drivers/mtd/nand/raw/gpmi-nand/gpmi-lib.c(547): gpmi_nfc_apply_timings()
>    hw>clk_rate=100000000  
>    clk_set_rate(r->clock[0], hw->clk_rate)=0
>    clk_get_rate(r->clock[0])=99000000
> 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.
> ...
> 
> 
> And "cat /sys/kernel/debug/clk/clk_summary" gives:
> 
>                                   enable  prepare  protect                                duty
>     clock                          count    count    count        rate   accuracy phase  cycle
> ---------------------------------------------------------------------------------------------
>   dummy                                2        2        0           0          0     0  50000
>      cko2_sel                          0        0        0           0          0     0  50000
>         cko2_podf                      0        0        0           0          0     0  50000
>            cko2                        0        0        0           0          0     0  50000
>      cko1_sel                          0        0        0           0          0     0  50000
>         cko1_podf                      0        0        0           0          0     0  50000
>            cko1                        0        0        0           0          0     0  50000
>               cko                      0        0        0           0          0     0  50000
>      usbphy2_gate                      1        1        0           0          0     0  50000
>      usbphy1_gate                      1        1        0           0          0     0  50000
>   ipp_di1                              0        0        0           0          0     0  50000
>   ipp_di0                              0        0        0           0          0     0  50000
>   osc                                  6        6        0    24000000          0     0  50000
>      perclk_sel                        1        1        0    24000000          0     0  50000
>         perclk                         3        3        0    24000000          0     0  50000
>            pwm7                        0        0        0    24000000          0     0  50000
>            pwm6                        0        0        0    24000000          0     0  50000
>            pwm5                        0        0        0    24000000          0     0  50000
>            i2c4                        0        0        0    24000000          0     0  50000
>            pwm8                        0        0        0    24000000          0     0  50000
>            pwm4                        0        0        0    24000000          0     0  50000
>            pwm3                        0        0        0    24000000          0     0  50000
>            pwm2                        0        0        0    24000000          0     0  50000
>            pwm1                        0        0        0    24000000          0     0  50000
>            i2c3                        0        0        0    24000000          0     0  50000
>            i2c2                        1        1        0    24000000          0     0  50000
>            i2c1                        0        0        0    24000000          0     0  50000
>            gpt1_serial                 1        1        0    24000000          0     0  50000
>            gpt1_bus                    1        1        0    24000000          0     0  50000
>            epit2                       0        0        0    24000000          0     0  50000
>            epit1                       0        0        0    24000000          0     0  50000
>            gpt2_serial                 0        0        0    24000000          0     0  50000
>            gpt2_bus                    0        0        0    24000000          0     0  50000
>      periph_clk2_sel                   0        0        0    24000000          0     0  50000
>         periph_clk2                    0        0        0    24000000          0     0  50000
>      gpt_3m                            0        0        0     3000000          0     0  50000
>      csi_sel                           0        0        0    24000000          0     0  50000
>         csi_podf                       0        0        0    24000000          0     0  50000
>            csi                         0        0        0    24000000          0     0  50000
>      pll7                              1        1        0   480000000          0     0  50000
>         pll7_bypass                    1        1        0   480000000          0     0  50000
>            pll7_usb_host               1        1        0   480000000          0     0  50000
>               usbphy2                  1        1        0   480000000          0     0  50000
>      pll6                              1        1        0   500000000          0     0  50000
>         pll6_bypass                    1        1        0   500000000          0     0  50000
>            pll6_enet                   2        2        0   500000000          0     0  50000
>               enet_ptp_ref             1        1        0    25000000          0     0  50000
>                  enet_ptp              1        1        0    25000000          0     0  50000
>               enet2_ref                0        0        0    50000000          0     0  50000
>                  enet_ref_125m         0        0        0    50000000          0     0  50000
>               enet_ref                 2        2        0    50000000          0     0  50000
>      pll5                              0        0        0   296600000          0     0  50000
>         pll5_bypass                    0        0        0   296600000          0     0  50000
>            pll5_video                  0        0        0   296600000          0     0  50000
>               pll5_post_div            0        0        0    74150000          0     0  50000
>                  pll5_video_div        0        0        0    74150000          0     0  50000
>      pll4                              0        0        0   147456000          0     0  50000
>         pll4_bypass                    0        0        0   147456000          0     0  50000
>            pll4_audio                  0        0        0   147456000          0     0  50000
>               pll4_post_div            0        0        0    36864000          0     0  50000
>                  pll4_audio_div        0        0        0    36864000          0     0  50000
>      pll3                              1        1        0   480000000          0     0  50000
>         pll3_bypass                    1        1        0   480000000          0     0  50000
>            pll3_usb_otg                2        2        0   480000000          0     0  50000
>               spdif_sel                0        0        0   480000000          0     0  50000
>                  spdif_pred            0        0        0   240000000          0     0  50000
>                     spdif_podf         0        0        0    30000000          0     0  50000
>                        spdif           0        0        0    30000000          0     0  50000
>               esai_sel                 0        0        0   480000000          0     0  50000
>                  esai_pred             0        0        0   240000000          0     0  50000
>                     esai_podf          0        0        0    30000000          0     0  50000
>                        esai_extal       0        0        0    30000000          0     0  50000
>               qspi1_sel                0        0        0   480000000          0     0  50000
>                  qspi1_podf            0        0        0   240000000          0     0  50000
>                     qspi1              0        0        0   240000000          0     0  50000
>                  ldb_di1_div_7         0        0        0    68571428          0     0  50000
>                     ldb_di1            0        0        0    68571428          0     0  50000
>                  ldb_di1_div_3_5       0        0        0   137142857          0     0  50000
>               periph2_clk2_sel         0        0        0   480000000          0     0  50000
>                  periph2_clk2          0        0        0   480000000          0     0  50000
>               pll3_60m                 0        0        0    60000000          0     0  50000
>                  can_sel               0        0        0    60000000          0     0  50000
>                     can_podf           0        0        0    30000000          0     0  50000
>                        can2_serial       0        0        0    30000000          0     0  50000
>                        can1_serial       0        0        0    30000000          0     0  50000
>                  ecspi_sel             0        0        0    60000000          0     0  50000
>                     ecspi_podf         0        0        0    60000000          0     0  50000
>                        ecspi4          0        0        0    60000000          0     0  50000
>                        ecspi3          0        0        0    60000000          0     0  50000
>                        ecspi2          0        0        0    60000000          0     0  50000
>                        ecspi1          0        0        0    60000000          0     0  50000
>               pll3_80m                 1        1        0    80000000          0     0  50000
>                  uart_sel              1        1        0    80000000          0     0  50000
>                     uart_podf          1        1        0    80000000          0     0  50000
>                        uart8_serial       0        0        0    80000000          0     0  50000
>                        uart7_serial       0        0        0    80000000          0     0  50000
>                        uart1_serial       1        2        0    80000000          0     0  50000
>                        uart6_serial       0        0        0    80000000          0     0  50000
>                        uart5_serial       0        0        0    80000000          0     0  50000
>                        uart4_serial       0        0        0    80000000          0     0  50000
>                        uart3_serial       0        0        0    80000000          0     0  50000
>                        uart2_serial       0        0        0    80000000          0     0  50000
>               pll3_pfd3_454m           0        0        0   454736842          0     0  50000
>               pll3_pfd2_508m           0        0        0   508235294          0     0  50000
>                  epdc_pre_sel          0        0        0   508235294          0     0  50000
>                     epdc_podf          0        0        0   254117647          0     0  50000
>                        epdc_pix        0        0        0   254117647          0     0  50000
>                        epdc_sel        0        0        0   254117647          0     0  50000
>                  sai1_sel              0        0        0   508235294          0     0  50000
>                     sai1_pred          0        0        0   127058824          0     0  50000
>                        sai1_podf       0        0        0    63529412          0     0  50000
>                           sai1         0        0        0    63529412          0     0  50000
>                  sai2_sel              0        0        0   508235294          0     0  50000
>                     sai2_pred          0        0        0   127058824          0     0  50000
>                        sai2_podf       0        0        0    63529412          0     0  50000
>                           sai2         0        0        0    63529412          0     0  50000
>                  sai3_sel              0        0        0   508235294          0     0  50000
>                     sai3_pred          0        0        0   127058824          0     0  50000
>                        sai3_podf       0        0        0    63529412          0     0  50000
>                           sai3         0        0        0    63529412          0     0  50000
>               pll3_pfd1_540m           0        0        0   540000000          0     0  50000
>                  lcdif_pre_sel         0        0        0   540000000          0     0  50000
>                     lcdif_pred         0        0        0   270000000          0     0  50000
>                        lcdif_podf       0        0        0   135000000          0     0  50000
>                           lcdif_pix       0        0        0   135000000          0     0  50000
>                           iomuxc       0        0        0   135000000          0     0  50000
>                           lcdif_sel       0        0        0   135000000          0     0  50000
>               pll3_pfd0_720m           0        0        0   720000000          0     0  50000
>               usbphy1                  1        1        0   480000000          0     0  50000
>      pll2                              1        1        0   528000000          0     0  50000
>         pll2_bypass                    1        1        0   528000000          0     0  50000
>            pll2_bus                    2        2        0   528000000          0     0  50000
>               ca7_secondary_sel        0        0        0   528000000          0     0  50000
>                  step                  0        0        0   528000000          0     0  50000
>               periph_pre               1        1        0   528000000          0     0  50000
>                  periph                3        3        0   528000000          0     0  50000
>                     ahb                7        7        0   132000000          0     0  50000
>                        sdma            0        0        0   132000000          0     0  50000
>                        rom             1        1        0   132000000          0     0  50000
>                        esai_mem        0        0        0   132000000          0     0  50000
>                        esai_ipg        0        0        0   132000000          0     0  50000
>                        aips_tz3        1        1        0   132000000          0     0  50000
>                        enet_ahb        2        2        0   132000000          0     0  50000
>                        dcp             0        0        0   132000000          0     0  50000
>                        asrc_mem        0        0        0   132000000          0     0  50000
>                        asrc_ipg        0        0        0   132000000          0     0  50000
>                        aips_tz2        1        1        0   132000000          0     0  50000
>                        aips_tz1        1        1        0   132000000          0     0  50000
>                        ipg            10       10        0    66000000          0     0  50000
>                           wdog3        0        0        0    66000000          0     0  50000
>                           uart8_ipg       0        0        0    66000000          0     0  50000
>                           usboh3       2        2        0    66000000          0     0  50000
>                           sai2_ipg       0        0        0    66000000          0     0  50000
>                           sai1_ipg       0        0        0    66000000          0     0  50000
>                           uart7_ipg       0        0        0    66000000          0     0  50000
>                           uart1_ipg       1        2        0    66000000          0     0  50000
>                           sai3_ipg       0        0        0    66000000          0     0  50000
>                           spdif_gclk       0        0        0    66000000          0     0  50000
>                           spba         0        0        0    66000000          0     0  50000
>                           wdog2        0        0        0    66000000          0     0  50000
>                           kpp          0        0        0    66000000          0     0  50000
>                           mmdc_p1_ipg       0        0        0    66000000          0     0  50000
>                           mmdc_p0_ipg       2        2        0    66000000          0     0  50000
>                           wdog1        1        1        0    66000000          0     0  50000
>                           gpio4        1        1        0    66000000          0     0  50000
>                           uart6_ipg       0        0        0    66000000          0     0  50000
>                           uart5_ipg       0        0        0    66000000          0     0  50000
>                           gpio3        1        1        0    66000000          0     0  50000
>                           ocotp        0        0        0    66000000          0     0  50000
>                           gpio5        1        1        0    66000000          0     0  50000
>                           gpio1        1        1        0    66000000          0     0  50000
>                           uart4_ipg       0        0        0    66000000          0     0  50000
>                           adc1         0        0        0    66000000          0     0  50000
>                           uart3_ipg       0        0        0    66000000          0     0  50000
>                           adc2         0        0        0    66000000          0     0  50000
>                           gpio2        1        1        0    66000000          0     0  50000
>                           uart2_ipg       0        0        0    66000000          0     0  50000
>                           can2_ipg       0        0        0    66000000          0     0  50000
>                           can1_ipg       0        0        0    66000000          0     0  50000
>                           enet         2        2        0    66000000          0     0  50000
>                     axi_sel            1        1        0   528000000          0     0  50000
>                        axi_podf        2        2        0   264000000          0     0  50000
>                           axi          1        1        0   264000000          0     0  50000
>                              eim_slow_sel       0        0        0   264000000          0     0  50000
>                                 eim_slow_podf       0        0        0   132000000          0     0  50000
>                                    eim       0        0        0   132000000          0     0  50000
>                              lcdif_apb       0        0        0   264000000          0     0  50000
>                              pxp       0        0        0   264000000          0     0  50000
>                              epdc_aclk       0        0        0   264000000          0     0  50000
>               pll2_pfd3_594m           0        0        0   594000000          0     0  50000
>                  ldb_di0_sel           0        0        0   594000000          0     0  50000
>                     ldb_di0_div_7       0        0        0    84857142          0     0  50000
>                        ldb_di0         0        0        0    84857142          0     0  50000
>                     ldb_di0_div_3_5       0        0        0   169714285          0     0  50000
>               pll2_pfd2_396m           2        2        0   396000000          0     0  50000
>                  enfc_sel              0        0        0   396000000          0     0  50000
>                     enfc_pred          0        0        0    99000000          0     0  50000
>                        enfc_podf       0        0        0    99000000          0     0  50000
>                           gpmi_io       0        0        0    99000000          0     0  50000
>                  usdhc1_sel            0        0        0   396000000          0     0  50000
>                     usdhc1_podf        0        0        0   198000000          0     0  50000
>                        usdhc1          0        0        0   198000000          0     0  50000
>                  usdhc2_sel            0        0        0   396000000          0     0  50000
>                     usdhc2_podf        0        0        0   198000000          0     0  50000
>                        usdhc2          0        0        0   198000000          0     0  50000
>                  bch_sel               1        1        0   396000000          0     0  50000
>                     bch_podf           1        1        0    99000000          0     0  50000
>                        gpmi_apb        0        0        0    99000000          0     0  50000
>                        gpmi_bch_apb       0        0        0    99000000          0     0  50000
>                        per_bch         0        0        0    99000000          0     0  50000
>                        apbh_dma        1        1        0    99000000          0     0  50000
>                  gpmi_sel              0        0        0   396000000          0     0  50000
>                     gpmi_podf          0        0        0    99000000          0     0  50000
>                        gpmi_bch        0        0        0    99000000          0     0  50000
>                  periph2_pre           1        1        0   396000000          0     0  50000
>                     periph2            2        2        0   396000000          0     0  50000
>                        mmdc_podf       2        2        0   396000000          0     0  50000
>                           mmdc_p0_fast       1        1        0   396000000          0     0  50000
>                  axi_alt_sel           0        0        0   396000000          0     0  50000
>                  pll2_198m             0        0        0   198000000          0     0  50000
>               pll2_pfd1_594m           0        0        0   594000000          0     0  50000
>               pll2_pfd0_352m           0        0        0   352000000          0     0  50000
>      pll1                              1        1        0   900000000          0     0  50000
>         pll1_bypass                    1        1        0   900000000          0     0  50000
>            pll1_sys                    1        1        0   900000000          0     0  50000
>               pll1_sw                  1        1        0   900000000          0     0  50000
>                  arm                   1        1        0   900000000          0     0  50000
>      pll7_bypass_src                   0        0        0    24000000          0     0  50000
>      pll6_bypass_src                   0        0        0    24000000          0     0  50000
>      pll5_bypass_src                   0        0        0    24000000          0     0  50000
>      pll4_bypass_src                   0        0        0    24000000          0     0  50000
>      pll3_bypass_src                   0        0        0    24000000          0     0  50000
>      pll2_bypass_src                   0        0        0    24000000          0     0  50000
>      pll1_bypass_src                   0        0        0    24000000          0     0  50000
>   ckil                                 0        0        0       32768          0     0  50000
> 
> 
> 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,

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  reply index

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-29  6:41 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 [this message]
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
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
  -- 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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