Date:   Tue, 7 Nov 2023 13:05:45 +0000
From:   Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To:     Abel Vesa <abel.vesa@...aro.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Kevin Hilman <khilman@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Pavel Machek <pavel@....cz>, Len Brown <len.brown@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Stanimir Varbanov <stanimir.k.varbanov@...il.com>,
        Vikash Garodia <quic_vgarodia@...cinc.com>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     Taniya Das <tdas@....qualcomm.com>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-media@...r.kernel.org,
        Jagadeesh Kona <quic_jkona@...cinc.com>
Subject: Re: [PATCH RESEND v3 4/5] clk: qcom: Use HW_CTRL_TRIGGER flag to
 switch video GDSC to HW mode

On 01/11/2023 09:04, Abel Vesa wrote:
> From: Jagadeesh Kona <quic_jkona@...cinc.com>
> 
> The current HW_CTRL flag switches the video GDSC to HW control mode as
> part of GDSC enable itself, instead of that use HW_CTRL_TRIGGER flag to
> give consumer drivers more control and switch the GDSC mode as and when
> required.
> 
> HW_CTRL_TRIGGER flag allows consumer drivers to switch the video GDSC to
> HW/SW control modes at runtime using dev_pm_genpd_set_hwmode API.
> 
> Signed-off-by: Jagadeesh Kona <quic_jkona@...cinc.com>
> Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> ---
>   drivers/clk/qcom/videocc-sc7180.c | 2 +-
>   drivers/clk/qcom/videocc-sc7280.c | 2 +-
>   drivers/clk/qcom/videocc-sdm845.c | 4 ++--
>   drivers/clk/qcom/videocc-sm8250.c | 4 ++--
>   drivers/clk/qcom/videocc-sm8550.c | 4 ++--
>   5 files changed, 8 insertions(+), 8 deletions(-)

So.

I'm assuming the rest of this series works however for sc8250 at least 
this is a NAK, breaks venus on rb5.

Reproduction:

- Debian trixie rb5
- Linux 6.6-rc3 + this patch
- Attached defconfig
- This file:
   https://download.samplelib.com/mp4/sample-30s.mp4
- This command:
   ffplay -loglevel debug -code:video h264_v4l2m2m -i sample-30s.mp4

Second play of file shows stuck gdsc as below

I didn't try on rb3, I'd expect similar results. Does this work on 8550 ?

[ 1601.581204] ------------[ cut here ]------------
[ 1601.585983] mvs0_gdsc status stuck at 'off'
[ 1601.586015] WARNING: CPU: 1 PID: 13372 at drivers/clk/qcom/gdsc.c:178 
gdsc_toggle_logic+0x16c/0x174
[ 1601.599627] Modules linked in: nf_tables libcrc32c nfnetlink 
snd_soc_hdmi_codec q6asm_dai q6routing q6afe_dai q6asm q6adm 
q6afe_clocks snd_q6dsp_common q6afe q6core apr pdr_interface venus_enc 
venus_dec qcom_camss videobuf2_dma_contig mcp251xfd imx412 
videobuf2_dma_sg venus_core xhci_plat_hcd v4l2_fwnode fastrpc xhci_hcd 
can_dev qrtr_smd lontium_lt9611uxc msm v4l2_async v4l2_mem2mem 
qcom_spmi_adc_tm5 rtc_pm8xxx qcom_spmi_adc5 qcom_pon videobuf2_memops 
crct10dif_ce qcom_spmi_temp_alarm videobuf2_v4l2 qcom_vadc_common 
gpu_sched drm_dp_aux_bus videodev snd_soc_sm8250 drm_display_helper 
snd_soc_qcom_sdw videobuf2_common snd_soc_qcom_common qrtr i2c_qcom_cci 
soundwire_qcom mc i2c_qcom_geni spi_geni_qcom phy_qcom_qmp_combo 
qcom_q6v5_pas qcom_rng soundwire_bus qcom_pil_info 
snd_soc_lpass_va_macro qcom_q6v5 slimbus snd_soc_lpass_macro_common 
qcom_sysmon snd_soc_lpass_wsa_macro display_connector qcom_common 
socinfo qcom_glink_smem qmi_helpers drm_kms_helper mdt_loader qcom_wdt 
icc_osm_l3 qnoc_sm8250 fuse drm backlight dm_mod
[ 1601.599859]  ip_tables x_tables
[ 1601.695314] CPU: 1 PID: 13372 Comm: video_decoder Not tainted 
6.6.0-rc3-00396-gdbc0d9fa7641-dirty #1
[ 1601.704694] Hardware name: Qualcomm Technologies, Inc. Robotics RB5 (DT)
[ 1601.711582] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS 
BTYPE=--)
[ 1601.718740] pc : gdsc_toggle_logic+0x16c/0x174
[ 1601.723317] lr : gdsc_toggle_logic+0x16c/0x174
[ 1601.727888] sp : ffff80008adab800
[ 1601.731296] x29: ffff80008adab800 x28: ffffb661e8596210 x27: 
ffffb661e855ad88
[ 1601.738629] x26: 0000000000000000 x25: ffff100c0b5a0d28 x24: 
ffffb6620fd92118
[ 1601.745960] x23: ffffb6620fe1d3d8 x22: 0000000000000000 x21: 
0000000000000001
[ 1601.753292] x20: 00000000ffffff92 x19: ffffb6620fd92118 x18: 
ffffffffffc0d3e8
[ 1601.760631] x17: 0000000000000000 x16: ffffb6620e269e14 x15: 
0000000000000028
[ 1601.767973] x14: 0000000000000000 x13: ffff100d75c00000 x12: 
0000000000000894
[ 1601.775304] x11: 00000000000002dc x10: ffff100d767044a0 x9 : 
ffff100d75c00000
[ 1601.782636] x8 : 00000000fffdffff x7 : ffff100d76700000 x6 : 
00000000000002dc
[ 1601.789976] x5 : ffff100d7ef40d48 x4 : 40000000fffe02dc x3 : 
ffff59ab6fa21000
[ 1601.797306] x2 : 0000000000000000 x1 : 0000000000000000 x0 : 
ffff100cdacdec80
[ 1601.804638] Call trace:
[ 1601.807161]  gdsc_toggle_logic+0x16c/0x174
[ 1601.811383]  gdsc_enable+0x60/0x27c
[ 1601.814982]  _genpd_power_on+0x94/0x184
[ 1601.818931]  genpd_power_on+0xa8/0x16c
[ 1601.822791]  genpd_runtime_resume+0xd4/0x2a4
[ 1601.827184]  __rpm_callback+0x48/0x1dc
[ 1601.831045]  rpm_callback+0x6c/0x78
[ 1601.834638]  rpm_resume+0x45c/0x6c8
[ 1601.838231]  __pm_runtime_resume+0x4c/0x90
[ 1601.842443]  coreid_power_v4+0x378/0x58c [venus_core]
[ 1601.847695]  vdec_start_streaming+0xc0/0x4e8 [venus_dec]
[ 1601.853169]  vb2_start_streaming+0x68/0x15c [videobuf2_common]
[ 1601.859199]  vb2_core_streamon+0xf8/0x1bc [videobuf2_common]
[ 1601.865032]  vb2_streamon+0x18/0x64 [videobuf2_v4l2]
[ 1601.870174]  v4l2_m2m_ioctl_streamon+0x38/0x98 [v4l2_mem2mem]
[ 1601.876134]  v4l_streamon+0x24/0x30 [videodev]
[ 1601.880759]  __video_do_ioctl+0x15c/0x3c0 [videodev]
[ 1601.885905]  video_usercopy+0x1f0/0x658 [videodev]
[ 1601.890868]  video_ioctl2+0x18/0x28 [videodev]
[ 1601.895481]  v4l2_ioctl+0x40/0x60 [videodev]
[ 1601.899911]  __arm64_sys_ioctl+0xac/0xf0
[ 1601.903958]  invoke_syscall+0x48/0x114
[ 1601.907829]  el0_svc_common.constprop.0+0x40/0xe0
[ 1601.912672]  do_el0_svc+0x1c/0x28
[ 1601.916085]  el0_svc+0x40/0xe8
[ 1601.919243]  el0t_64_sync_handler+0x100/0x12c
[ 1601.923730]  el0t_64_sync+0x190/0x194
[ 1601.927505] ---[ end trace 0000000000000000 ]---
[ 1608.121533] ------------[ cut here ]------------

And just reverting the one patch - yields

[  157.083287] qcom-venus aa00000.video-codec: Failed to switch 
power-domain:1 to SW mode
[  162.004630] qcom-venus aa00000.video-codec: Failed to switch 
power-domain:1 to SW mode

I'll leave the testing here. Please fix !

---
bod
View attachment "defconfig" of type "text/plain" (285106 bytes)

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