kernel/drivers/pmdomain/mediatek, branch linux-rolling-stable

pmdomain: mtk-pm-domains: Fix spinlock recursion fix in probe

2025-12-29T10:41:09Z

Remove scpsys_get_legacy_regmap(), replacing its usage with of_find_node_with_property(). Explicitly call of_node_get(np) before each of_find_node_with_property() to maintain correct node reference counting. The of_find_node_with_property() function "consumes" its input by calling of_node_put() internally, whether or not it finds a match. Currently, dev->of_node (np) is passed multiple times in sequence without incrementing its reference count, causing it to be decremented multiple times and risking early memory release. Adding of_node_get(np) before each call balances the reference count, preventing premature node release. Fixes: c1bac49fe91f ("pmdomains: mtk-pm-domains: Fix spinlock recursion in probe") Cc: stable@vger.kernel.org Signed-off-by: Macpaul Lin Tested-by: Louis-Alexis Eyraud Signed-off-by: Ulf Hansson

pmdomain: Merge branch fixes into next

2025-11-24T10:14:36Z

Merge the pmdomain fixes for v6.18-rc[n] into the next branch, to allow them to get tested together with the new changes that are targeted for v6.19. Signed-off-by: Ulf Hansson

pmdomains: mtk-pm-domains: Fix spinlock recursion in probe

2025-11-24T10:04:17Z

For some reason, of_find_node_with_property() is creating a spinlock recursion issue along with fwnode_count_parents(), and this issue is making all MediaTek boards unbootable. As of kernel v6.18-rc6, there are only three users of this function, one of which is this driver. Migrate away from of_find_node_with_property() by adding a local scpsys_get_legacy_regmap_node() function, which acts similarly to of_find_node_with_property(), and calling the former in place of the latter. This resolves the following spinlock recursion issue: [ 1.773979] BUG: spinlock recursion on CPU#2, kworker/u24:1/60 [ 1.790485] lock: devtree_lock+0x0/0x40, .magic: dead4ead, .owner: kworker/u24:1/60, .owner_cpu: 2 [ 1.791644] CPU: 2 UID: 0 PID: 60 Comm: kworker/u24:1 Tainted: G W 6.18.0-rc6 #3 PREEMPT [ 1.791649] Tainted: [W]=WARN [ 1.791650] Hardware name: MediaTek Genio-510 EVK (DT) [ 1.791653] Workqueue: events_unbound deferred_probe_work_func [ 1.791658] Call trace: [ 1.791659] show_stack+0x18/0x30 (C) [ 1.791664] dump_stack_lvl+0x68/0x94 [ 1.791668] dump_stack+0x18/0x24 [ 1.791672] spin_dump+0x78/0x88 [ 1.791678] do_raw_spin_lock+0x110/0x140 [ 1.791684] _raw_spin_lock_irqsave+0x58/0x6c [ 1.791690] of_get_parent+0x28/0x74 [ 1.791694] of_fwnode_get_parent+0x38/0x7c [ 1.791700] fwnode_count_parents+0x34/0xf0 [ 1.791705] fwnode_full_name_string+0x28/0x120 [ 1.791710] device_node_string+0x3e4/0x50c [ 1.791715] pointer+0x294/0x430 [ 1.791718] vsnprintf+0x21c/0x5bc [ 1.791722] vprintk_store+0x108/0x47c [ 1.791728] vprintk_emit+0xc4/0x350 [ 1.791732] vprintk_default+0x34/0x40 [ 1.791736] vprintk+0x24/0x30 [ 1.791740] _printk+0x60/0x8c [ 1.791744] of_node_release+0x154/0x194 [ 1.791749] kobject_put+0xa0/0x120 [ 1.791753] of_node_put+0x18/0x28 [ 1.791756] of_find_node_with_property+0x74/0x100 [ 1.791761] scpsys_probe+0x338/0x5e0 [ 1.791765] platform_probe+0x5c/0xa4 [ 1.791770] really_probe+0xbc/0x2ac [ 1.791774] __driver_probe_device+0x78/0x118 [ 1.791779] driver_probe_device+0x3c/0x170 [ 1.791783] __device_attach_driver+0xb8/0x150 [ 1.791788] bus_for_each_drv+0x88/0xe8 [ 1.791792] __device_attach+0x9c/0x1a0 [ 1.791796] device_initial_probe+0x14/0x20 [ 1.791801] bus_probe_device+0xa0/0xa4 [ 1.791805] deferred_probe_work_func+0x88/0xd0 [ 1.791809] process_one_work+0x1e8/0x448 [ 1.791813] worker_thread+0x1ac/0x340 [ 1.791816] kthread+0x138/0x220 [ 1.791821] ret_from_fork+0x10/0x20 Fixes: c29345fa5f66 ("pmdomain: mediatek: Refactor bus protection regmaps retrieval") Signed-off-by: AngeloGioacchino Del Regno Tested-by: Louis-Alexis Eyraud Tested-by: Macpaul Lin Reviewed-by: Macpaul Lin Signed-off-by: Ulf Hansson

pmdomain: mediatek: convert from clk round_rate() to determine_rate()

2025-11-19T17:06:50Z

The round_rate() clk ops is deprecated in the clk framework in favor of the determine_rate() clk ops, so let's convert this driver so that round_rate() can be removed from the clk core. Signed-off-by: Brian Masney Reviewed-by: Nicolas Frattaroli Signed-off-by: Ulf Hansson

pmdomain: mediatek: mtk-mfg: select MAILBOX in Kconfig

2025-11-19T17:06:50Z

The mtk-mfg pmdomain driver calls common mailbox framework functions. If the common mailbox framework is not selected in the kernel's configuration, the build runs into a linker error, as the symbols are absent. The hardware mailbox Kconfig system, MAILBOX, has no dependencies of its own. It's therefore safe to "select" it rather than use "depend on". Declare this "select" dependency in the Kconfig for the driver. Fixes: 1ff1f0db6aec ("pmdomain: mediatek: Add support for MFlexGraphics") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202510301311.TcOCnZ1s-lkp@intel.com/ Signed-off-by: Nicolas Frattaroli Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Ulf Hansson

pmdomain: mediatek: Add support for MFlexGraphics

2025-11-19T17:06:50Z

Various MediaTek SoCs use GPU integration silicon named "MFlexGraphics" by MediaTek. On the MT8196 and MT6991 SoCs, interacting with this integration silicon is required to power on the GPU. This glue silicon is in the form of an embedded microcontroller running special-purpose firmware, which autonomously adjusts clocks and regulators. Implement a driver, modelled as a pmdomain driver with a set_performance_state operation, to support these SoCs. The driver also exposes the actual achieved clock rate, as read back from the MCU, as common clock framework clocks, by acting as a clock provider as well. Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Nicolas Frattaroli Signed-off-by: Ulf Hansson

pmdomain: mediatek: Fix build-errors

2025-11-19T17:06:50Z

Let's add the missing header to fix the reported build-errors. Fixes: df4e9ec1ed86 ("pmdomain: mediatek: Add support for secure HWCCF infra power on") Reported-by: Stephen Rothwell Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202510231317.ZZxNaFG0-lkp@intel.com/ Signed-off-by: Ulf Hansson

pmdomain: mediatek: Add support for MT8196 HFRPSYS power domains

2025-11-19T17:06:50Z

Add support for the HFRPSYS Multimedia power domains found in the MediaTek MT8196 Chromebook SoC. Those power domains are all managed by the Hardware Voter MCU. Reviewed-by: Nícolas F. R. A. Prado Signed-off-by: AngeloGioacchino Del Regno Signed-off-by: Ulf Hansson

pmdomain: mediatek: Add support for MT8196 SCPSYS power domains

2025-11-19T17:06:50Z

Add a new SPM bus protection block and add support for both the direct control and HW Voter control SCPSYS power domains found in the MT8196 and MT6991 SoCs. Reviewed-by: Nícolas F. R. A. Prado Signed-off-by: AngeloGioacchino Del Regno Signed-off-by: Ulf Hansson

pmdomain: mediatek: Add support for secure HWCCF infra power on

2025-11-19T17:06:50Z

Some SoCs, like the MediaTek Dimensity 9400 (MT6991), have granular power controls and will disable power to the infracfg to save power when the platform is in deeper sleep states (or when no IP in the the infracfg macro-block is in use). These chips also cannot control the infracfg power states directly via AP register writes as those are protected by the secure world. Add a new MTK_SCPD_INFRA_PWR_CTL cap and, if present, make a call to the secure world to poweron the infracfg block, as the HWV IP resides in there, when executing HWV domains power sequences. Reviewed-by: Nícolas F. R. A. Prado Signed-off-by: AngeloGioacchino Del Regno Signed-off-by: Ulf Hansson