linux-kernel - Re: [PATCH v3] firmware: qcom_scm: Clear download bit during reboot

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Message-ID: <052bacf7-756b-5f63-965b-9a8480a9acf5@quicinc.com>
Date:   Thu, 18 May 2023 16:13:51 +0530
From:   Mukesh Ojha <quic_mojha@...cinc.com>
To:     Robert Marko <robimarko@...il.com>, <agross@...nel.org>,
        <andersson@...nel.org>, <konrad.dybcio@...aro.org>
CC:     <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] firmware: qcom_scm: Clear download bit during reboot



On 5/18/2023 3:45 PM, Robert Marko wrote:
> 
> On 16. 03. 2023. 16:14, Mukesh Ojha wrote:
>> During normal restart of a system download bit should
>> be cleared irrespective of whether download mode is
>> set or not.
>>
>> Fixes: 8c1b7dc9ba22 ("firmware: qcom: scm: Expose download-mode control")
>> Signed-off-by: Mukesh Ojha <quic_mojha@...cinc.com>
> 
> Hi, this has been backported to 5.15.111, however it seems to be 
> breaking reboot

Thanks for reporting the issue, by any chance enabling 
CONFIG_QCOM_SCM_DOWNLOAD_MODE_DEFAULT + reboot works on
IPQ4019 ?

> on IPQ4019 by causing the board to then hang in SBL with:
> root@...nWrt:/# reboot
> root@...nWrt:/# [   76.473541] device lan1 left promiscuous mode
> [   76.474204] br-lan: port 1(lan1) entered disabled state
> [   76.527975] device lan2 left promiscuous mode
> [   76.530301] br-lan: port 2(lan2) entered disabled state
> [   76.579376] device lan3 left promiscuous mode
> [   76.581698] br-lan: port 3(lan3) entered disabled state
> [   76.638434] device lan4 left promiscuous mode
> [   76.638777] br-lan: port 4(lan4) entered disabled state
> [   76.978489] qca8k-ipq4019 c000000.switch wan: Link is Down
> [   76.978883] device eth0 left promiscuous mode
> [   76.987077] ipqess-edma c080000.ethernet eth0: Link is Down
> [
> Format: Log Type - Time(microsec) - Message - Optional Info
> Log Type: B - Since Boot(Power On Reset),  D - Delta,  S - Statistic
> S - QC_IMAGE_VERSION_STRING=BOOT.BF.3.1.1-00123
> S - IMAGE_VARIANT_STRING=DAABANAZA
> S - OEM_IMAGE_VERSION_STRING=CRM
> S - Boot Config, 0x00000021
> S - Reset status Config, 0x00000010
> S - Core 0 Frequency, 0 MHz
> B -       261 - PBL, Start
> B -      1339 - bootable_media_detect_entry, Start
> B -      1679 - bootable_media_detect_success, Start
> B -      1693 - elf_loader_entry, Start
> B -      5076 - auth_hash_seg_entry, Start
> B -      7223 - auth_hash_seg_exit, Start
> B -    578349 - elf_segs_hash_verify_entry, Start
> B -    696356 - PBL, End
> B -    696380 - SBL1, Start
> B -    787236 - pm_device_init, Start
> D -         7 - pm_device_init, Delta
> B -    788701 - boot_flash_init, Start
> D -     52782 - boot_flash_init, Delta
> B -    845625 - boot_config_data_table_init, Start
> D -      3836 - boot_config_data_table_init, Delta - (419 Bytes)
> B -    852841 - clock_init, Start
> D -      7566 - clock_init, Delta
> B -    864883 - CDT version:2,Platform ID:9,Major ID:0,Minor 
> ID:0,Subtype:64
> B -    868413 - sbl1_ddr_set_params, Start
> B -    873402 - cpr_init, Start
> D -         2 - cpr_init, Delta
> B -    877842 - Pre_DDR_clock_init, Start
> D -         4 - Pre_DDR_clock_init, Delta
> D -     13234 - sbl1_ddr_set_params, Delta
> B -    891155 - pm_driver_init, Start
> D -         2 - pm_driver_init, Delta
> B -    909105 - Image Load, Start
> B -   1030210 - Boot error ocuured!. Error code: 303d
> 
> Reverting the commit fixes rebooting.
> 
> Regards,
> Robert
> 
>> ---
>> Changes in v3:
>>    - Added Fixes tag.
>>    - Removed it from below patch series, as it makes sense to go this 
>> independently.
>>      
>> https://lore.kernel.org/lkml/1677664555-30191-1-git-send-email-quic_mojha@quicinc.com/
>>
>> Changes in v2:
>>    - No change.
>>
>>   drivers/firmware/qcom_scm.c | 3 +--
>>   1 file changed, 1 insertion(+), 2 deletions(-)
>>
>> diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
>> index 468d4d5..3e020d1 100644
>> --- a/drivers/firmware/qcom_scm.c
>> +++ b/drivers/firmware/qcom_scm.c
>> @@ -1506,8 +1506,7 @@ static int qcom_scm_probe(struct platform_device 
>> *pdev)
>>   static void qcom_scm_shutdown(struct platform_device *pdev)
>>   {
>>       /* Clean shutdown, disable download mode to allow normal restart */
>> -    if (download_mode)
>> -        qcom_scm_set_download_mode(false);
>> +    qcom_scm_set_download_mode(false);
>>   }
>>   static const struct of_device_id qcom_scm_dt_match[] = {