Re: [PATCH v8 2/9] clk: qcom: gcc-msm8939: mark Venus core GDSCs as hardware controlled

[Erikas Bitovtas <xerikasxx@gmail.com>]

On 5/21/26 12:29 PM, Taniya Das wrote:
> 
> 
> On 5/20/2026 2:02 PM, Bryan O'Donoghue wrote:
>> On 19/05/2026 16:10, Erikas Bitovtas wrote:
>>> Allow Venus core GDSCs to have their control passed to hardware, so they
>>> can be powered on by Venus firmware.
>>>
>>> Signed-off-by: Erikas Bitovtas <xerikasxx@gmail.com>
>>> ---
>>>   drivers/clk/qcom/gcc-msm8939.c | 4 ++++
>>>   1 file changed, 4 insertions(+)
>>>
>>> diff --git a/drivers/clk/qcom/gcc-msm8939.c b/drivers/clk/qcom/gcc-
>>> msm8939.c
>>> index 45193b3d714b..243d31a32e92 100644
>>> --- a/drivers/clk/qcom/gcc-msm8939.c
>>> +++ b/drivers/clk/qcom/gcc-msm8939.c
>>> @@ -3664,6 +3664,7 @@ static struct clk_branch gcc_venus0_vcodec0_clk = {
>>>
>>>   static struct clk_branch gcc_venus0_core0_vcodec0_clk = {
>>>       .halt_reg = 0x4c02c,
>>> +    .halt_check = BRANCH_HALT_SKIP,
> 
> please use .halt_check = BRANCH_HALT
> 
If I do that, the clock fails to power on on boot.
[   20.324488] ------------[ cut here ]------------
[   20.324520] gcc_venus0_core0_vcodec0_clk status stuck at 'off'
[   20.324663] WARNING: drivers/clk/qcom/clk-branch.c:88 at
clk_branch_toggle+0x124/0x170, CPU#7: (udev-worker)/1010
[   20.324723] Modules linked in: snd_soc_apq8016_sbc(+)
snd_soc_qcom_common venus_core(+) qcom_q6v5_mss(+) v4l2_mem2mem
qcom_pil_info videobuf2_v4l2 qcom_common qcom_q6v5 videobuf2_common
videodev mc qcom_memshare tun binfmt_misc nft_reject_inet nft_reject
nf_reject_ipv6 nf_reject_ipv4 nft_ct nf_conntrack zram nf_defrag_ipv6
nf_defrag_ipv4 zsmalloc lz4_compress zstd_compress nf_tables uhid uinput
fuse nfnetlink ipv6 xfs usb_f_ncm u_ether panel_asus_z00t_tm5p5_nt35596
edt_ft5x06 pm8916_bms_vm msm ubwc_config mdt_loader gpu_sched drm_gpuvm
drm_exec drm_display_helper cec libcomposite
[   20.325245] CPU: 7 UID: 0 PID: 1010 Comm: (udev-worker) Not tainted
7.0.0-msm8916 #41 PREEMPT
[   20.325273] Hardware name: Asus ZenFone 2 Laser/Selfie (1080p) (DT)
[   20.325290] pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS
BTYPE=--)
[   20.325314] pc : clk_branch_toggle+0x124/0x170
[   20.325348] lr : clk_branch_toggle+0x120/0x170
[   20.325377] sp : ffff800082ab3430
[   20.325390] x29: ffff800082ab3440 x28: 0000000000000001 x27:
ffff0000236724c0
[   20.325435] x26: 0000000000000002 x25: ffff0000236724c0 x24:
0000000000000000
[   20.325477] x23: 0000000000000000 x22: ffff800081017b3e x21:
ffff8000813e9f38
[   20.325519] x20: ffff8000806f7f50 x19: 0000000000000001 x18:
0000000000000000
[   20.325560] x17: 0000000000000001 x16: 0000000000000800 x15:
0000000000000003
[   20.325601] x14: ffff800081315120 x13: 0000000000000003 x12:
0000000000000003
[   20.325643] x11: 0000000000000000 x10: 0000000000000027 x9 :
ebcfd48ff0c24800
[   20.325684] x8 : ebcfd48ff0c24800 x7 : 7461206b63757473 x6 :
0000000000000027
[   20.325725] x5 : ffff80008151038a x4 : ffff800080fc8d13 x3 :
0000000000000000
[   20.325766] x2 : 0000000000000000 x1 : ffff800082ab3200 x0 :
00000000fffffff0
[   20.325808] Call trace:
[   20.325821]  clk_branch_toggle+0x124/0x170 (P)
[   20.325859]  clk_branch2_enable+0x20/0x30
[   20.325894]  clk_core_enable+0x6c/0x2c8
[   20.325923]  clk_core_enable_lock+0x8c/0x120
[   20.325960]  clk_enable+0x1c/0x30
[   20.325994]  vcodec_clks_enable+0x4c/0xc8 [venus_core]
[   20.326190]  core_power_v1+0x270/0x2c0 [venus_core]
[   20.326370]  venus_runtime_resume+0x58/0x80 [venus_core]
[   20.326548]  pm_generic_runtime_resume+0x2c/0x48
[   20.326579]  __rpm_callback+0x80/0x470
[   20.326609]  rpm_resume+0x3cc/0x5f8
[   20.326637]  __pm_runtime_resume+0x4c/0x98
[   20.326665]  venus_probe+0x1fc/0x3b8 [venus_core]
[   20.326844]  platform_probe+0x60/0xa8
[   20.326881]  really_probe+0x154/0x448
[   20.326911]  __driver_probe_device+0xa4/0x120
[   20.326943]  driver_probe_device+0x44/0x230
[   20.326973]  __driver_attach+0xf0/0x280
[   20.327003]  bus_for_each_dev+0xf0/0x150
[   20.327031]  driver_attach+0x28/0x38
[   20.327061]  bus_add_driver+0x14c/0x2a8
[   20.327088]  driver_register+0x6c/0x108
[   20.327119]  __platform_driver_register+0x24/0x38
[   20.327154]  init_module+0x24/0xfb8 [venus_core]
[   20.327332]  do_one_initcall+0xe4/0x3e0
[   20.327363]  do_init_module+0x5c/0x248
[   20.327393]  load_module+0x16ac/0x18c0
[   20.327421]  __arm64_sys_finit_module+0x238/0x360
[   20.327449]  invoke_syscall+0x44/0xd8
[   20.327483]  el0_svc_common+0x84/0xe0
[   20.327515]  do_el0_svc+0x20/0x30
[   20.327547]  el0_svc+0x24/0x70
[   20.327582]  el0t_64_sync_handler+0x7c/0x120
[   20.327616]  el0t_64_sync+0x154/0x158
[   20.327643] ---[ end trace 0000000000000000 ]---