kernel/linux.git/drivers/gpu/drm/mgag200, branch v6.19.11

drm/mgag200: fix mgag200_bmc_stop_scanout()

2026-02-04T07:52:53+00:00

The mgag200_bmc_stop_scanout() function is called by the .atomic_disable() handler for the MGA G200 VGA BMC encoder. This function performs a few register writes to inform the BMC of an upcoming mode change, and then polls to wait until the BMC actually stops. The polling is implemented using a busy loop with udelay() and an iteration timeout of 300, resulting in the function blocking for 300 milliseconds. The function gets called ultimately by the output_poll_execute work thread for the DRM output change polling thread of the mgag200 driver: kworker/0:0-mm_ 3528 [000] 4555.315364: ffffffffaa0e25b3 delay_halt.part.0+0x33 ffffffffc03f6188 mgag200_bmc_stop_scanout+0x178 ffffffffc087ae7a disable_outputs+0x12a ffffffffc087c12a drm_atomic_helper_commit_tail+0x1a ffffffffc03fa7b6 mgag200_mode_config_helper_atomic_commit_tail+0x26 ffffffffc087c9c1 commit_tail+0x91 ffffffffc087d51b drm_atomic_helper_commit+0x11b ffffffffc0509694 drm_atomic_commit+0xa4 ffffffffc05105e8 drm_client_modeset_commit_atomic+0x1e8 ffffffffc0510ce6 drm_client_modeset_commit_locked+0x56 ffffffffc0510e24 drm_client_modeset_commit+0x24 ffffffffc088a743 __drm_fb_helper_restore_fbdev_mode_unlocked+0x93 ffffffffc088a683 drm_fb_helper_hotplug_event+0xe3 ffffffffc050f8aa drm_client_dev_hotplug+0x9a ffffffffc088555a output_poll_execute+0x29a ffffffffa9b35924 process_one_work+0x194 ffffffffa9b364ee worker_thread+0x2fe ffffffffa9b3ecad kthread+0xdd ffffffffa9a08549 ret_from_fork+0x29 On a server running ptp4l with the mgag200 driver loaded, we found that ptp4l would sometimes get blocked from execution because of this busy waiting loop. Every so often, approximately once every 20 minutes -- though with large variance -- the output_poll_execute() thread would detect some sort of change that required performing a hotplug event which results in attempting to stop the BMC scanout, resulting in a 300msec delay on one CPU. On this system, ptp4l was pinned to a single CPU. When the output_poll_execute() thread ran on that CPU, it blocked ptp4l from executing for its 300 millisecond duration. This resulted in PTP service disruptions such as failure to send a SYNC message on time, failure to handle ANNOUNCE messages on time, and clock check warnings from the application. All of this despite the application being configured with FIFO_RT and a higher priority than the background workqueue tasks. (However, note that the kernel did not use CONFIG_PREEMPT...) It is unclear if the event is due to a faulty VGA connection, another bug, or actual events causing a change in the connection. At least on the system under test it is not a one-time event and consistently causes disruption to the time sensitive applications. The function has some helpful comments explaining what steps it is attempting to take. In particular, step 3a and 3b are explained as such: 3a - The third step is to verify if there is an active scan. We are waiting on a 0 on remhsyncsts (. 3b - This step occurs only if the remove is actually scanning. We are waiting for the end of the frame which is a 1 on remvsyncsts (). The actual steps 3a and 3b are implemented as while loops with a non-sleeping udelay(). The first step iterates while the tmp value at position 0 is *not* set. That is, it keeps iterating as long as the bit is zero. If the bit is already 0 (because there is no active scan), it will iterate the entire 300 attempts which wastes 300 milliseconds in total. This is opposite of what the description claims. The step 3b logic only executes if we do not iterate over the entire 300 attempts in the first loop. If it does trigger, it is trying to check and wait for a 1 on the remvsyncsts. However, again the condition is actually inverted and it will loop as long as the bit is 1, stopping once it hits zero (rather than the explained attempt to wait until we see a 1). Worse, both loops are implemented using non-sleeping waits which spin instead of allowing the scheduler to run other processes. If the kernel is not configured to allow arbitrary preemption, it will waste valuable CPU time doing nothing. There does not appear to be any documentation for the BMC register interface, beyond what is in the comments here. It seems more probable that the comment here is correct and the implementation accidentally got inverted from the intended logic. Reading through other DRM driver implementations, it does not appear that the .atomic_enable or .atomic_disable handlers need to delay instead of sleep. For example, the ast_astdp_encoder_helper_atomic_disable() function calls ast_dp_set_phy_sleep() which uses msleep(). The "atomic" in the name is referring to the atomic modesetting support, which is the support to enable atomic configuration from userspace, and not to the "atomic context" of the kernel. There is no reason to use udelay() here if a sleep would be sufficient. Replace the while loops with a read_poll_timeout() based implementation that will sleep between iterations, and which stops polling once the condition is met (instead of looping as long as the condition is met). This aligns with the commented behavior and avoids blocking on the CPU while doing nothing. Note the RREG_DAC is implemented using a statement expression to allow working properly with the read_poll_timeout family of functions. The other RREG_ macros ought to be cleaned up to have better semantics, and several places in the mgag200 driver could make use of RREG_DAC or similar RREG_* macros should likely be cleaned up for better semantics as well, but that task has been left as a future cleanup for a non-bugfix. Fixes: 414c45310625 ("mgag200: initial g200se driver (v2)") Suggested-by: Thomas Zimmermann Signed-off-by: Jacob Keller Reviewed-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Signed-off-by: Thomas Zimmermann Link: https://patch.msgid.link/20260202-jk-mgag200-fix-bad-udelay-v2-1-ce1e9665987d@intel.com

Merge tag 'drm-fixes-2025-12-13' of https://gitlab.freedesktop.org/drm/kernel

2025-12-13T05:39:28+00:00

Pull more drm fixes from Dave Airlie: "These are the enqueued fixes that ended up in our fixes branch, nouveau mostly, along with some small fixes in other places. plane: - Handle IS_ERR vs NULL in drm_plane_create_hotspot_properties() ttm: - fix devcoredump for evicted bos panel: - Fix stack usage warning in novatek-nt35560 nouveau: - alloc fwsec sb at boot to avoid s/r problems - fix strcpy usage - fix i2c encoder crash bridge: - Ignore spurious PLL_UNLOCK bit in ti-sn65dsi83 mgag200: - Fix bigendian handling in mgag200 tilcdc: - Fix probe failure in tilcdc" * tag 'drm-fixes-2025-12-13' of https://gitlab.freedesktop.org/drm/kernel: drm/mgag200: Fix big-endian support drm/tilcdc: Fix removal actions in case of failed probe drm/ttm: Avoid NULL pointer deref for evicted BOs drm: nouveau: Replace sprintf() with sysfs_emit() drm/nouveau: fix circular dep oops from vendored i2c encoder drm/nouveau: refactor deprecated strcpy drm/plane: Fix IS_ERR() vs NULL check in drm_plane_create_hotspot_properties() drm/bridge: ti-sn65dsi83: ignore PLL_UNLOCK errors drm/nouveau/gsp: Allocate fwsec-sb at boot drm/panel: novatek-nt35560: avoid on-stack device structure

drm/mgag200: Fix big-endian support

2025-12-10T08:33:53+00:00

Unlike the original, deleted Matrox mga driver, the new mgag200 driver has the XRGB frame-buffer byte swapped on big-endian "RISC" systems. Fix by enabling byte swapping "PowerPC" OPMODE for any __BIG_ENDIAN config. Fixes: 414c45310625 ("mgag200: initial g200se driver (v2)") Signed-off-by: René Rebe Cc: stable@kernel.org Reviewed-by: Thomas Zimmermann Signed-off-by: Thomas Zimmermann Link: https://patch.msgid.link/20251208.141827.965103015954471168.rene@exactco.de

drm: include drm_print.h where needed

2025-10-31T08:34:52+00:00

There are a gazillion files that depend on drm_print.h being indirectly included via drm_buddy.h, drm_mm.h, or ttm/ttm_resource.h. In preparation for removing those includes, explicitly include drm_print.h where needed. Cc: Thomas Zimmermann Reviewed-by: Thomas Zimmermann Signed-off-by: Jani Nikula Link: https://lore.kernel.org/r/5fe67395907be33eb5199ea6d540e29fddee71c8.1761734313.git.jani.nikula@intel.com

Merge tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel

2025-07-31T02:26:49+00:00

Pull drm updates from Dave Airlie: "Highlights: - Intel xe enable Panthor Lake, started adding WildCat Lake - amdgpu has a bunch of reset improvments along with the usual IP updates - msm got VM_BIND support which is important for vulkan sparse memory - more drm_panic users - gpusvm common code to handle a bunch of core SVM work outside drivers. Detail summary: Changes outside drm subdirectory: - 'shrink_shmem_memory()' for better shmem/hibernate interaction - Rust support infrastructure: - make ETIMEDOUT available - add size constants up to SZ_2G - add DMA coherent allocation bindings - mtd driver for Intel GPU non-volatile storage - i2c designware quirk for Intel xe core: - atomic helpers: tune enable/disable sequences - add task info to wedge API - refactor EDID quirks - connector: move HDR sink to drm_display_info - fourcc: half-float and 32-bit float formats - mode_config: pass format info to simplify dma-buf: - heaps: Give CMA heap a stable name ci: - add device tree validation and kunit displayport: - change AUX DPCD access probe address - add quirk for DPCD probe - add panel replay definitions - backlight control helpers fbdev: - make CONFIG_FIRMWARE_EDID available on all arches fence: - fix UAF issues format-helper: - improve tests gpusvm: - introduce devmem only flag for allocation - add timeslicing support to GPU SVM ttm: - improve eviction sched: - tracing improvements - kunit improvements - memory leak fixes - reset handling improvements color mgmt: - add hardware gamma LUT handling helpers bridge: - add destroy hook - switch to reference counted drm_bridge allocations - tc358767: convert to devm_drm_bridge_alloc - improve CEC handling panel: - switch to reference counter drm_panel allocations - fwnode panel lookup - Huiling hl055fhv028c support - Raspberry Pi 7" 720x1280 support - edp: KDC KD116N3730A05, N160JCE-ELL CMN, N116BCJ-EAK - simple: AUO P238HAN01 - st7701: Winstar wf40eswaa6mnn0 - visionox: rm69299-shift - Renesas R61307, Renesas R69328 support - DJN HX83112B hdmi: - add CEC handling - YUV420 output support xe: - WildCat Lake support - Enable PanthorLake by default - mark BMG as SRIOV capable - update firmware recommendations - Expose media OA units - aux-bux support for non-volatile memory - MTD intel-dg driver for non-volatile memory - Expose fan control and voltage regulator in sysfs - restructure migration for multi-device - Restore GuC submit UAF fix - make GEM shrinker drm managed - SRIOV VF Post-migration recovery of GGTT nodes - W/A additions/reworks - Prefetch support for svm ranges - Don't allocate managed BO for each policy change - HWMON fixes for BMG - Create LRC BO without VM - PCI ID updates - make SLPC debugfs files optional - rework eviction rejection of bound external BOs - consolidate PAT programming logic for pre/post Xe2 - init changes for flicker-free boot - Enable GuC Dynamic Inhibit Context switch i915: - drm_panic support for i915/xe - initial flip queue off by default for LNL/PNL - Wildcat Lake Display support - Support for DSC fractional link bpp - Support for simultaneous Panel Replay and Adaptive sync - Support for PTL+ double buffer LUT - initial PIPEDMC event handling - drm_panel_follower support - DPLL interface renames - allocate struct intel_display dynamically - flip queue preperation - abstract DRAM detection better - avoid GuC scheduling stalls - remove DG1 force probe requirement - fix MEI interrupt handler on RT kernels - use backlight control helpers for eDP - more shared display code refactoring amdgpu: - add userq slot to INFO ioctl - SR-IOV hibernation support - Suspend improvements - Backlight improvements - Use scaling for non-native eDP modes - cleaner shader updates for GC 9.x - Remove fence slab - SDMA fw checks for userq support - RAS updates - DMCUB updates - DP tunneling fixes - Display idle D3 support - Per queue reset improvements - initial smartmux support amdkfd: - enable KFD on loongarch - mtype fix for ext coherent system memory radeon: - CS validation additional GL extensions - drop console lock during suspend/resume - bump driver version msm: - VM BIND support - CI: infrastructure updates - UBWC single source of truth - decouple GPU and KMS support - DP: rework I/O accessors - DPU: SM8750 support - DSI: SM8750 support - GPU: X1-45 support and speedbin support for X1-85 - MDSS: SM8750 support nova: - register! macro improvements - DMA object abstraction - VBIOS parser + fwsec lookup - sysmem flush page support - falcon: generic falcon boot code and HAL - FWSEC-FRTS: fb setup and load/execute ivpu: - Add Wildcat Lake support - Add turbo flag ast: - improve hardware generations implementation imx: - IMX8qxq Display Controller support lima: - Rockchip RK3528 GPU support nouveau: - fence handling cleanup panfrost: - MT8370 support - bo labeling - 64-bit register access qaic: - add RAS support rockchip: - convert inno_hdmi to a bridge rz-du: - add RZ/V2H(P) support - MIPI-DSI DCS support sitronix: - ST7567 support sun4i: - add H616 support tidss: - add TI AM62L support - AM65x OLDI bridge support bochs: - drm panic support vkms: - YUV and R* format support - use faux device vmwgfx: - fence improvements hyperv: - move out of simple - add drm_panic support" * tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel: (1479 commits) drm/tidss: oldi: convert to devm_drm_bridge_alloc() API drm/tidss: encoder: convert to devm_drm_bridge_alloc() drm/amdgpu: move reset support type checks into the caller drm/amdgpu/sdma7: re-emit unprocessed state on ring reset drm/amdgpu/sdma6: re-emit unprocessed state on ring reset drm/amdgpu/sdma5.2: re-emit unprocessed state on ring reset drm/amdgpu/sdma5: re-emit unprocessed state on ring reset drm/amdgpu/gfx12: re-emit unprocessed state on ring reset drm/amdgpu/gfx11: re-emit unprocessed state on ring reset drm/amdgpu/gfx10: re-emit unprocessed state on ring reset drm/amdgpu/gfx9.4.3: re-emit unprocessed state on kcq reset drm/amdgpu/gfx9: re-emit unprocessed state on kcq reset drm/amdgpu: Add WARN_ON to the resource clear function drm/amd/pm: Use cached metrics data on SMUv13.0.6 drm/amd/pm: Use cached data for min/max clocks gpu: nova-core: fix bounds check in PmuLookupTableEntry::new drm/amdgpu: Replace HQD terminology with slots naming drm/amdgpu: Add user queue instance count in HW IP info drm/amd/amdgpu: Add helper functions for isp buffers drm/amd/amdgpu: Initialize swnode for ISP MFD device ...

drm/mgag200: Do not include

2025-06-13T06:54:31+00:00

Fix the compile-time warning drivers/gpu/drm/mgag200/mgag200_ddc.c: warning: EXPORT_SYMBOL() is not used, but #include is present Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://lore.kernel.org/r/20250612085308.203861-1-tzimmermann@suse.de

Merge drm/drm-next into drm-misc-next

2025-06-11T07:01:34+00:00

Backmerging to forward to v6.16-rc1 Signed-off-by: Thomas Zimmermann

Merge tag 'pci-v6.16-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci

2025-06-04T18:26:17+00:00

Pull pci updates from Bjorn Helgaas: "Enumeration: - Print the actual delay time in pci_bridge_wait_for_secondary_bus() instead of assuming it was 1000ms (Wilfred Mallawa) - Revert 'iommu/amd: Prevent binding other PCI drivers to IOMMU PCI devices', which broke resume from system sleep on AMD platforms and has been fixed by other commits (Lukas Wunner) Resource management: - Remove mtip32xx use of pcim_iounmap_regions(), which is deprecated and unnecessary (Philipp Stanner) - Remove pcim_iounmap_regions() and pcim_request_region_exclusive() and related flags since all uses have been removed (Philipp Stanner) - Rework devres 'request' functions so they are no longer 'hybrid', i.e., their behavior no longer depends on whether pcim_enable_device or pci_enable_device() was used, and remove related code (Philipp Stanner) - Warn (not BUG()) about failure to assign optional resources (Ilpo Järvinen) Error handling: - Log the DPC Error Source ID only when it's actually valid (when ERR_FATAL or ERR_NONFATAL was received from a downstream device) and decode into bus/device/function (Bjorn Helgaas) - Determine AER log level once and save it so all related messages use the same level (Karolina Stolarek) - Use KERN_WARNING, not KERN_ERR, when logging PCIe Correctable Errors (Karolina Stolarek) - Ratelimit PCIe Correctable and Non-Fatal error logging, with sysfs controls on interval and burst count, to avoid flooding logs and RCU stall warnings (Jon Pan-Doh) Power management: - Increment PM usage counter when probing reset methods so we don't try to read config space of a powered-off device (Alex Williamson) - Set all devices to D0 during enumeration to ensure ACPI opregion is connected via _REG (Mario Limonciello) Power control: - Rename pwrctrl Kconfig symbols from 'PWRCTL' to 'PWRCTRL' to match the filename paths. Retain old deprecated symbols for compatibility, except for the pwrctrl slot driver (PCI_PWRCTRL_SLOT) (Johan Hovold) - When unregistering pwrctrl, cancel outstanding rescan work before cleaning up data structures to avoid use-after-free issues (Brian Norris) Bandwidth control: - Simplify link bandwidth controller by replacing the count of Link Bandwidth Management Status (LBMS) events with a PCI_LINK_LBMS_SEEN flag (Ilpo Järvinen) - Update the Link Speed after retraining, since the Link Speed may have changed (Ilpo Järvinen) PCIe native device hotplug: - Ignore Presence Detect Changed caused by DPC. pciehp already ignores Link Down/Up events caused by DPC, but on slots using in-band presence detect, DPC causes a spurious Presence Detect Changed event (Lukas Wunner) - Ignore Link Down/Up caused by Secondary Bus Reset. On hotplug ports using in-band presence detect, the reset causes a Presence Detect Changed event, which mistakenly caused teardown and re-enumeration of the device. Drivers may need to annotate code that resets their device (Lukas Wunner) Virtualization: - Add an ACS quirk for Loongson Root Ports that don't advertise ACS but don't allow peer-to-peer transactions between Root Ports; the quirk allows each Root Port to be in a separate IOMMU group (Huacai Chen) Endpoint framework: - For fixed-size BARs, retain both the actual size and the possibly larger size allocated to accommodate iATU alignment requirements (Jerome Brunet) - Simplify ctrl/SPAD space allocation and avoid allocating more space than needed (Jerome Brunet) - Correct MSI-X PBA offset calculations for DesignWare and Cadence endpoint controllers (Niklas Cassel) - Align the return value (number of interrupts) encoding for pci_epc_get_msi()/pci_epc_ops::get_msi() and pci_epc_get_msix()/pci_epc_ops::get_msix() (Niklas Cassel) - Align the nr_irqs parameter encoding for pci_epc_set_msi()/pci_epc_ops::set_msi() and pci_epc_set_msix()/pci_epc_ops::set_msix() (Niklas Cassel) Common host controller library: - Convert pci-host-common to a library so platforms that don't need native host controller drivers don't need to include these helper functions (Manivannan Sadhasivam) Apple PCIe controller driver: - Extract ECAM bridge creation helper from pci_host_common_probe() to separate driver-specific things like MSI from PCI things (Marc Zyngier) - Dynamically allocate RID-to_SID bitmap to prepare for SoCs with varying capabilities (Marc Zyngier) - Skip ports disabled in DT when setting up ports (Janne Grunau) - Add t6020 compatible string (Alyssa Rosenzweig) - Add T602x PCIe support (Hector Martin) - Directly set/clear INTx mask bits because T602x dropped the accessors that could do this without locking (Marc Zyngier) - Move port PHY registers to their own reg items to accommodate T602x, which moves them around; retain default offsets for existing DTs that lack phy%d entries with the reg offsets (Hector Martin) - Stop polling for core refclk, which doesn't work on T602x and the bootloader has already done anyway (Hector Martin) - Use gpiod_set_value_cansleep() when asserting PERST# in probe because we're allowed to sleep there (Hector Martin) Cadence PCIe controller driver: - Drop a runtime PM 'put' to resolve a runtime atomic count underflow (Hans Zhang) - Make the cadence core buildable as a module (Kishon Vijay Abraham I) - Add cdns_pcie_host_disable() and cdns_pcie_ep_disable() for use by loadable drivers when they are removed (Siddharth Vadapalli) Freescale i.MX6 PCIe controller driver: - Apply link training workaround only on IMX6Q, IMX6SX, IMX6SP (Richard Zhu) - Remove redundant dw_pcie_wait_for_link() from imx_pcie_start_link(); since the DWC core does this, imx6 only needs it when retraining for a faster link speed (Richard Zhu) - Toggle i.MX95 core reset to align with PHY powerup (Richard Zhu) - Set SYS_AUX_PWR_DET to work around i.MX95 ERR051624 erratum: in some cases, the controller can't exit 'L23 Ready' through Beacon or PERST# deassertion (Richard Zhu) - Clear GEN3_ZRXDC_NONCOMPL to work around i.MX95 ERR051586 erratum: controller can't meet 2.5 GT/s ZRX-DC timing when operating at 8 GT/s, causing timeouts in L1 (Richard Zhu) - Wait for i.MX95 PLL lock before enabling controller (Richard Zhu) - Save/restore i.MX95 LUT for suspend/resume (Richard Zhu) Mobiveil PCIe controller driver: - Return bool (not int) for link-up check in mobiveil_pab_ops.link_up() and layerscape-gen4, mobiveil (Hans Zhang) NVIDIA Tegra194 PCIe controller driver: - Create debugfs directory for 'aspm_state_cnt' only when CONFIG_PCIEASPM is enabled, since there are no other entries (Hans Zhang) Qualcomm PCIe controller driver: - Add OF support for parsing DT 'eq-presets-gts' property for lane equalization presets (Krishna Chaitanya Chundru) - Read Maximum Link Width from the Link Capabilities register if DT lacks 'num-lanes' property (Krishna Chaitanya Chundru) - Add Physical Layer 64 GT/s Capability ID and register offsets for 8, 32, and 64 GT/s lane equalization registers (Krishna Chaitanya Chundru) - Add generic dwc support for configuring lane equalization presets (Krishna Chaitanya Chundru) - Add DT and driver support for PCIe on IPQ5018 SoC (Nitheesh Sekar) Renesas R-Car PCIe controller driver: - Describe endpoint BAR 4 as being fixed size (Jerome Brunet) - Document how to obtain R-Car V4H (r8a779g0) controller firmware (Yoshihiro Shimoda) Rockchip PCIe controller driver: - Reorder rockchip_pci_core_rsts because reset_control_bulk_deassert() deasserts in reverse order, to fix a link training regression (Jensen Huang) - Mark RK3399 as being capable of raising INTx interrupts (Niklas Cassel) Rockchip DesignWare PCIe controller driver: - Check only PCIE_LINKUP, not LTSSM status, to determine whether the link is up (Shawn Lin) - Increase N_FTS (used in L0s->L0 transitions) and enable ASPM L0s for Root Complex and Endpoint modes (Shawn Lin) - Hide the broken ATS Capability in rockchip_pcie_ep_init() instead of rockchip_pcie_ep_pre_init() so it stays hidden after PERST# resets non-sticky registers (Shawn Lin) - Call phy_power_off() before phy_exit() in rockchip_pcie_phy_deinit() (Diederik de Haas) Synopsys DesignWare PCIe controller driver: - Set PORT_LOGIC_LINK_WIDTH to one lane to make initial link training more robust; this will not affect the intended link width if all lanes are functional (Wenbin Yao) - Return bool (not int) for link-up check in dw_pcie_ops.link_up() and armada8k, dra7xx, dw-rockchip, exynos, histb, keembay, keystone, kirin, meson, qcom, qcom-ep, rcar_gen4, spear13xx, tegra194, uniphier, visconti (Hans Zhang) - Add debugfs support for exposing DWC device-specific PTM context (Manivannan Sadhasivam) TI J721E PCIe driver: - Make j721e buildable as a loadable and removable module (Siddharth Vadapalli) - Fix j721e host/endpoint dependencies that result in link failures in some configs (Arnd Bergmann) Device tree bindings: - Add qcom DT binding for 'global' interrupt (PCIe controller and link-specific events) for ipq8074, ipq8074-gen3, ipq6018, sa8775p, sc7280, sc8180x sdm845, sm8150, sm8250, sm8350 (Manivannan Sadhasivam) - Add qcom DT binding for 8 MSI SPI interrupts for msm8998, ipq8074, ipq8074-gen3, ipq6018 (Manivannan Sadhasivam) - Add dw rockchip DT binding for rk3576 and rk3562 (Kever Yang) - Correct indentation and style of examples in brcm,stb-pcie, cdns,cdns-pcie-ep, intel,keembay-pcie-ep, intel,keembay-pcie, microchip,pcie-host, rcar-pci-ep, rcar-pci-host, xilinx-versal-cpm (Krzysztof Kozlowski) - Convert Marvell EBU (dove, kirkwood, armada-370, armada-xp) and armada8k from text to schema DT bindings (Rob Herring) - Remove obsolete .txt DT bindings for content that has been moved to schemas (Rob Herring) - Add qcom DT binding for MHI registers in IPQ5332, IPQ6018, IPQ8074 and IPQ9574 (Varadarajan Narayanan) - Convert v3,v360epc-pci from text to DT schema binding (Rob Herring) - Change microchip,pcie-host DT binding to be 'dma-noncoherent' since PolarFire may be configured that way (Conor Dooley) Miscellaneous: - Drop 'pci' suffix from intel_mid_pci.c filename to match similar files (Andy Shevchenko) - All platforms with PCI have an MMU, so add PCI Kconfig dependency on MMU to simplify build testing and avoid inadvertent build regressions (Arnd Bergmann) - Update Krzysztof Wilczyński's email address in MAINTAINERS (Krzysztof Wilczyński) - Update Manivannan Sadhasivam's email address in MAINTAINERS (Manivannan Sadhasivam)" * tag 'pci-v6.16-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci: (147 commits) MAINTAINERS: Update Manivannan Sadhasivam email address PCI: j721e: Fix host/endpoint dependencies PCI: j721e: Add support to build as a loadable module PCI: cadence-ep: Introduce cdns_pcie_ep_disable() helper for cleanup PCI: cadence-host: Introduce cdns_pcie_host_disable() helper for cleanup PCI: cadence: Add support to build pcie-cadence library as a kernel module MAINTAINERS: Update Krzysztof Wilczyński email address PCI: Remove unnecessary linesplit in __pci_setup_bridge() PCI: WARN (not BUG()) when we fail to assign optional resources PCI: Remove unused pci_printk() PCI: qcom: Replace PERST# sleep time with proper macro PCI: dw-rockchip: Replace PERST# sleep time with proper macro PCI: host-common: Convert to library for host controller drivers PCI/ERR: Remove misleading TODO regarding kernel panic PCI: cadence: Remove duplicate message code definitions PCI: endpoint: Align pci_epc_set_msix(), pci_epc_ops::set_msix() nr_irqs encoding PCI: endpoint: Align pci_epc_set_msi(), pci_epc_ops::set_msi() nr_irqs encoding PCI: endpoint: Align pci_epc_get_msix(), pci_epc_ops::get_msix() return value encoding PCI: endpoint: Align pci_epc_get_msi(), pci_epc_ops::get_msi() return value encoding PCI: cadence-ep: Correct PBA offset in .set_msix() callback ...

drm/mgag200: Use helpers for programming gamma ramps

2025-05-26T07:19:24+00:00

Replace mgag200's code for programming the hardware gamma LUT with DRM helpers. Either load a provided gamma ramp or program a default. Set the individual entries with a callback. Each gamma value is given as 3 individual 16-bit values for red, green and blue. The driver reduces them to 8 bit to make them fit into hardware registers. v2: - fix coding style Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://lore.kernel.org/r/20250520094203.30545-4-tzimmermann@suse.de

PCI: Add CONFIG_MMU dependency

2025-04-23T20:40:30+00:00

It turns out that there are no platforms that have PCI but don't have an MMU, so adding a Kconfig dependency on CONFIG_PCI simplifies build testing kernels for those platforms a lot, and avoids a lot of inadvertent build regressions. Add a dependency for CONFIG_PCI and remove all the ones for PCI specific device drivers that are currently marked not having it. There are a few platforms that have an optional MMU, but they usually cannot have PCI at all. The one exception is Coldfire MCF54xx, but this is mainly for historic reasons, and anyone using those chips should really use the MMU these days. Link: https://lore.kernel.org/lkml/a41f1b20-a76c-43d8-8c36-f12744327a54@app.fastmail.com/ Signed-off-by: Arnd Bergmann Signed-off-by: Bjorn Helgaas Reviewed-by: Martin K. Petersen # SCSI Reviewed-by: Thomas Zimmermann Acked-by: Alex Deucher Link: https://patch.msgid.link/20250423202215.3315550-1-arnd@kernel.org