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

drm/tiny: pixpaper: add explicit dependency on MMU

2025-11-06T12:47:29+00:00

The DRM_GEM_SHMEM_HELPER helper requires MMU enabled because it uses vmf_insert_pfn() in its mmap implementation. On NOMMU configurations (e.g. some RISC-V randconfig builds), this symbol is unavailable and selecting DRM_GEM_SHMEM_HELPER causes a modpost undefined reference: ERROR: modpost: "vmf_insert_pfn" [drivers/gpu/drm/drm_shmem_helper.ko] undefined! Normally, Kconfig prevents this helper from being selected when CONFIG_MMU=n. However, in some randconfig builds (such as those used by 0day CI), select statements can override unmet dependencies, triggering the issue. Add an explicit dependency on MMU to DRM_PIXPAPER to prevent this. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202510280213.0rlYA4T3-lkp@intel.com/ Fixes: 0c4932f6ddf8 ("drm/tiny: pixpaper: Fix missing dependency on DRM_GEM_SHMEM_HELPER") Acked-by: Thomas Zimmermann Signed-off-by: LiangCheng Wang Signed-off-by: Thomas Zimmermann Link: https://patch.msgid.link/20251028-bar-v1-1-edfbd13fafff@gmail.com

drm/tiny: pixpaper: Fix missing dependency on DRM_GEM_SHMEM_HELPER

2025-09-23T12:07:04+00:00

The driver uses drm_gem_shmem_prime_import_no_map() and drm_gem_shmem_dumb_create(), but the Kconfig currently selects DRM_GEM_DMA_HELPER instead of DRM_GEM_SHMEM_HELPER. This causes link failures when DRM_GEM_SHMEM_HELPER is not enabled. Select DRM_GEM_SHMEM_HELPER to fix the build. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202509220320.gfFZjmyg-lkp@intel.com/ Fixes: c9e70639f591 ("drm: tiny: Add support for Mayqueen Pixpaper e-ink panel") Reviewed-by: Thomas Zimmermann Signed-off-by: LiangCheng Wang Signed-off-by: Thomas Zimmermann Link: https://lore.kernel.org/r/20250922-bar-v1-1-b2a1f54ace82@gmail.com

drm: tiny: Add support for Mayqueen Pixpaper e-ink panel

2025-09-05T12:53:07+00:00

Introduce a DRM driver for the Mayqueen Pixpaper e-ink display panel, which is controlled via SPI. The driver supports a 122x250 resolution display with XRGB8888 format. Also, add a MAINTAINERS entry for the Pixpaper driver. Signed-off-by: LiangCheng Wang Reviewed-by: Thomas Zimmermann Signed-off-by: Thomas Zimmermann Link: https://lore.kernel.org/r/20250902-drm-v5-3-d77c678c4ae3@gmail.com

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/sitronix: move tiny Sitronix drivers to their own subdir

2025-05-12T08:26:40+00:00

We start to have support many Sitronix displays in the tiny directory, and we expect more to come. Move them to their own subdirectory. Reviewed-by: Javier Martinez Canillas Suggested-by: Javier Martinez Canillas Signed-off-by: Marcus Folkesson Acked-by: Thomas Zimmermann Link: https://lore.kernel.org/r/20250512-sitronix-v3-1-bbf6cc413698@gmail.com Signed-off-by: Javier Martinez Canillas

drm/appletbdrm: Make appletbdrm depend on X86

2025-04-29T13:30:52+00:00

The appletbdrm driver is exclusively for Touch Bars on x86 Intel Macs. The M1 Macs have a separate driver. So, lets avoid compiling it for other architectures. Signed-off-by: Aditya Garg Reviewed-by: Alyssa Rosenzweig Link: https://lore.kernel.org/r/PN3PR01MB95970778982F28E4A3751392B8B72@PN3PR01MB9597.INDPRD01.PROD.OUTLOOK.COM Signed-off-by: Alyssa Rosenzweig

drm/st7571-i2c: select CONFIG_DRM_CLIENT_SELECTION

2025-04-29T10:29:24+00:00

The newly added driver calls drm_client_setup(), but that is not always built in: x86_64-linux-ld: vmlinux.o: in function `st7571_probe': st7571-i2c.c:(.text+0x7b7119): undefined reference to `drm_client_setup' Select the appropriate Kconfig symbol. Fixes: 4b35f0f41ee2 ("drm/st7571-i2c: add support for Sitronix ST7571 LCD controller") Signed-off-by: Arnd Bergmann Reviewed-by: Javier Martinez Canillas Reviewed-by: Marcus Folkesson Link: https://lore.kernel.org/r/20250428150752.3970145-1-arnd@kernel.org Signed-off-by: Javier Martinez Canillas

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

drm/st7571-i2c: add support for Sitronix ST7571 LCD controller

2025-04-23T19:47:23+00:00

Sitronix ST7571 is a 4bit gray scale dot matrix LCD controller. The controller has a SPI, I2C and 8bit parallel interface, this driver is for the I2C interface only. Reviewed-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Signed-off-by: Marcus Folkesson Link: https://lore.kernel.org/r/20250423-st7571-v6-2-e9519e3c4ec4@gmail.com Signed-off-by: Javier Martinez Canillas

drm: Move sysfb drivers into separate subdirectory

2025-04-07T09:02:06+00:00

The ofdrm and simpledrm drivers are special as they operate on externally provided framebuffers. Move them into their own sub- directory. Will let them share common code. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Link: https://lore.kernel.org/r/20250401094056.32904-5-tzimmermann@suse.de