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

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Date:   Thu, 18 May 2023 12:15:26 +0200
From:   Robert Marko <robimarko@...il.com>
To:     Mukesh Ojha <quic_mojha@...cinc.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 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
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[] = {