kernel/linux.git/drivers/pmdomain, branch v6.18.48

pmdomain: mediatek: Fix mt8183 hang on boot

2026-08-23T12:26:59+00:00

commit 818d56ac1d08b68a4c42d0326786f030cc640722 upstream. Depending on firmware, part of the MFG domains may be partially left ON at boot time with kernel detecting PD as ON, while it's OFF. Some of MFG cores may be left powered after bootloader, to let the ACP to prefetch the GPU region when the display controller is brought up for a continuous splash animation performed by downstream stack. This doesn't play well with an eventual delay in probing upstream Panfrost driver when the display controller is fully set up, as that would make genpd's sync_state() to power off the domain while ACP tries to prefetch: this is causing an AXI stall, effectively freezing the AP indefinitely. In order to prevent trouble from happening, the sync_state() functionality must be obliterated on all of the MFG domains: while this guarantees a power leakage if the bootloader boots the kernel with MFG PDs partially powered on, this is the only way to ensure stable operation of the SoC during boot on devices with such firmware because, of course, those will never officially receive a firmware update. Fixes Kappa Chromebook hanging during system boot. Fixes: 0e789b491ba0 ("pmdomain: core: Leave powered-on genpds on until sync_state") Fixes: 13a4b7fb6260 ("pmdomain: core: Leave powered-on genpds on until late_initcall_sync") Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Dmitry Osipenko Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman

pmdomains: mediatek: Avoid setting RTFF's CLK_DIS before NRESTORE

2026-08-23T12:26:59+00:00

commit cbb0140379de69fa46526672f3003f128f0b4e2e upstream. For the PCIE_PHY (also called PEXTP_PHY) type of RTFF hardware, there is special handling setting CLK_DIS before performing the NRESTORE sequence for resetting the RTFF and start sequencing from a clean state. That special handling, though, poses an issue in case the machine specific bootchain (bootloader in particular) ends up booting the kernel with both PCIe MAC and PHY enabled (not just power domains) as doing so will partially corrupt the PCIe MAC/PHY registers in an unpredictable manner, producing either an initialization fail in the PCI-Express drivers, or even a hard lockup! Resolve this by simply removing the special handling: in this case the bootchain, or remote processors, setting is getting honored by the later check for PWR_RTFF_SAVE_FLAG presence in the RTFF ctl register. Fixes: 9d02c94342b3 ("pmdomain: mediatek: Add support for RTFF Hardware in MT8196/MT6991") Signed-off-by: AngeloGioacchino Del Regno Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman

pmdomain: mediatek: fix remaining %pOF after of_node_put()

2026-08-23T12:26:58+00:00

commit 3e013bc8b941bd52c8e3a99798d0ae8792cb71ca upstream. scpsys_get_bus_protection_legacy() looks up several legacy bus protection regmaps from device-tree nodes. Two error paths put the device node before checking whether the regmap lookup failed, but still pass that node to dev_err_probe() with %pOF on failure. If of_node_put() drops the last reference, the later %pOF formatting can dereference a freed device node. Keep the node reference until after the error message has been emitted in the infracfg and SMI lookup paths. Also drop the SMI node before returning when the SMI phandle is missing. Fixes: c29345fa5f66 ("pmdomain: mediatek: Refactor bus protection regmaps retrieval") Signed-off-by: Guangshuo Li Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman

pmdomain: arm: Fix -EINVAL from scmi_pd_set_perf_state() on state 0

2026-08-23T12:26:58+00:00

commit 3314c90a2eda3df7da4ab6f4388e667b2758de7f upstream. Currently, scmi_pd_set_perf_state() treats a performance state of 0 as invalid and returns -EINVAL. As a result, devices attached to SCMI performance domains can report failures when relinquishing their performance vote. The OPP framework use performance state 0 to indicate that no performance vote is required. For example, dev_pm_opp_set_rate(dev, 0) is commonly used (by firmware or linux) when a device is runtime suspended. A zero performance state does not require any SCMI performance request to be sent. Treat it as a no-op and return success instead of reporting an error. Signed-off-by: Praveen Talari Fixes: 2af23ceb8624 ("pmdomain: arm: Add the SCMI performance domain") Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman

pmdomain: imx93-blk-ctrl: Extract PHY as shared domain for DSI/CSI

2026-08-03T09:22:12+00:00

[ Upstream commit 99611233f8cda833169fa6487d5dacdf189e5cb0 ] The MIPI DSI and CSI domains share control bits for clock and reset, which can lead to incorrect behavior if one domain disables the shared resource while the other is still active. To fix the issue, introduce a shared MIPI PHY power domain to own the common resources and make DSI and CSI its subdomains. This ensures the shared bits are properly managed and not disabled while still in use. Fixes: e9aa77d413c9 ("soc: imx: add i.MX93 media blk ctrl driver") Cc: stable@vger.kernel.org Signed-off-by: Guoniu Zhou Reviewed-by: Frank Li Reviewed-by: Peng Fan Signed-off-by: Ulf Hansson Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

pmdomain: imx93-blk-ctrl: convert to devm_* only

2026-08-03T09:22:12+00:00

[ Upstream commit 52becc142280eeef828d19f9cd01fd653b588786 ] Convert the driver to devm_ APIs only by making use of devm_add_action_or_reset() and devm_pm_runtime_enable() to simplify the probe error path and to drop the .remove() callback. This also ensures that the device release order equals the device probe error path order. Furthermore drop the dev_set_drvdata() usage since the only user was the .remove() callback which is removed by this commit. Reviewed-by: Frank Li Signed-off-by: Marco Felsch Signed-off-by: Ulf Hansson Stable-dep-of: 99611233f8cd ("pmdomain: imx93-blk-ctrl: Extract PHY as shared domain for DSI/CSI") Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

pmdomain: imx: Fix i.MX8MP VC8000E power up sequence

2026-07-24T14:17:17+00:00

commit 25e252bcf1593b420b12a7231d9dd64b885a2ae2 upstream. Per errata[1]: ERR050531: VPU_NOC power down handshake may hang during VC8000E/VPUMIX power up/down cycling. Description: VC8000E reset de-assertion edge and AXI clock may have a timing issue. Workaround: Set bit2 (vc8000e_clk_en) of BLK_CLK_EN_CSR to 0 to gate off both AXI clock and VC8000E clock sent to VC8000E and AXI clock sent to VPU_NOC m_v_2 interface during VC8000E power up(VC8000E reset is de-asserted by HW) Add a bool variable is_errata_err050531 in 'struct imx8m_blk_ctrl_domain_data' to represent whether the workaround is needed. If is_errata_err050531 is true, first clear the clk before powering up gpc, then enable the clk after powering up gpc. [1] https://www.nxp.com/webapp/Download?colCode=IMX8MP_1P33A Fixes: a1a5f15f7f6cb ("soc: imx: imx8m-blk-ctrl: add i.MX8MP VPU blk ctrl") Cc: stable@vger.kernel.org Signed-off-by: Peng Fan Reviewed-by: Frank Li Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman

pmdomain: imx: Fix i.MX8MP power notifier

2026-07-24T14:17:17+00:00

commit 72422525f641f68bed6ca3389d29ee3f41fdea33 upstream. Using imx8mm_vpu_power_notifier() for i.MX8MP is wrong, as it ungates the VPU clocks to provide the ADB clock, which is necessary on i.MX8MM, but on i.MX8MP there is a separate gate (bit 3) for the NoC. So add imx8mp_vpu_power_notifier() for i.MX8MP. Fixes: a1a5f15f7f6cb ("soc: imx: imx8m-blk-ctrl: add i.MX8MP VPU blk ctrl") Cc: stable@vger.kernel.org Reviewed-by: Frank Li Signed-off-by: Peng Fan Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman

pmdomain: ti_sci: add wakeup constraint to parent devices of wakeup source

2026-06-19T11:44:11+00:00

commit 4db207599acfc9d676340daa2dc6b52bfca17db4 upstream. Set wakeup constraint for any device in a wakeup path. All parent devices of a wakeup device should not be turned off during suspend. This ensures the wakeup device is kept on while the system is suspended. Cc: stable@vger.kernel.org Fixes: 9d8aa0dd3be4 ("pmdomain: ti_sci: add wakeup constraint management") Reported-by: Vitor Soares Closes: https://lore.kernel.org/linux-pm/c0fe43a2339c802e9ce5900092cd530a2ba17a6b.camel@gmail.com/ Signed-off-by: Kendall Willis Reviewed-by: Sebin Francis Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman

pmdomain: imx: fix OF node refcount

2026-06-19T11:44:11+00:00

commit fba0510cd62666951dcc0221527edc0c47ae6599 upstream. for_each_child_of_node_scoped() decrements the reference count of the nod after each iteration. Assigning it without incrementing the refcount to a dynamically allocated platform device will result in a double put in platform_device_release(). Add the missing call to of_node_get(). Cc: stable@vger.kernel.org Fixes: 3e4d109ee8fc ("pmdomain: imx: gpc: Simplify with scoped for each OF child loop") Signed-off-by: Bartosz Golaszewski Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman