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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-24 08:46:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-24 08:46:03 -0700 |
| commit | cf9610f9116d55c5a66ef9f1faecacabd93a9322 (patch) | |
| tree | 757a3d280760c654767631cab5ad8af2d86d1848 /drivers/gpu/host1x/mipi.c | |
| download | linux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.tar.gz linux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.zip | |
Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlgrafted
Pull pin control updates from Linus Walleij:
"Core changes:
- Use the non-blocking mux_state_try_select() in the generic MUX pin
control back-end
- Free pin maps on pinctrl_generic_to_map() failure in the core
helpers
New hardware pin control:
- Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC
(this is for the low power audio, LPASS = Low Power Audio SubSystem
portions)
- Upboard support on top of the Intel pin controller
- Apple T6030 and T6031 support (just compatible strings)
- Samsung Exynos 8855 SoC
- Mediatek MT6858 SoC
- Rockchip RK3308B and RV1106 SoCs
- Airoha EN7523 and AN7563 SoCs
Improvements:
- Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable
- Qualcomm improvements on top of the Qualcomm PDC (power domain
controller) irqchip improvements from tglx:s tree
- Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups
- The NPCM8xx driver has been put into shape fixing many pin and
group definitions
- Some non-urgent Tegra 264 pin assignments are fixed up
- Some non-urgent fixups to Airoha AN7581 and AN7583 registers and
pin assignments, missing features etc"
* tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits)
dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema
pinctrl: meson: sync some modify from A4
pinctrl: meson: a4: Add input enable pin configuration
pinctrl: realtek: rtd1625: remove unused group name spdif_sel
pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13
dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema
Revert "Merge branch 'ib-rsk7204' into devel"
pinctrl: rockchip: Add RV1106 pinctrl support
dt-bindings: pinctrl: rockchip: Add RV1106 compatible
pinctrl: rockchip: Decode drive strength in the get function
pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable
pinctrl: airoha: add support of an7563 SoC
dt-bindings: pinctrl: airoha: add support of an7563 pin controller
pinctrl: airoha: try to find chip scu node by phandle first
pinctrl: airoha: add support of en7523 SoC
dt-bindings: pinctrl: airoha: add support of en7523 pin controller
pinctrl: airoha: an7583: add support for olt pinmux
pinctrl: airoha: an7583: add support for pon_alt pinmux
pinctrl: airoha: an7583: add support for npu_uart pinmux
dt-bindings: pinctrl: airoha: an7583: add missed features
...
Diffstat (limited to 'drivers/gpu/host1x/mipi.c')
| -rw-r--r-- | drivers/gpu/host1x/mipi.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/drivers/gpu/host1x/mipi.c b/drivers/gpu/host1x/mipi.c new file mode 100644 index 000000000..988681423 --- /dev/null +++ b/drivers/gpu/host1x/mipi.c @@ -0,0 +1,195 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2013 NVIDIA Corporation + * Copyright (C) 2025 Svyatoslav Ryhel <clamor95@gmail.com> + */ + +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/iopoll.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/tegra-mipi-cal.h> + +/* only need to support one provider */ +static struct { + struct device_node *np; + const struct tegra_mipi_ops *ops; +} provider; + +/** + * tegra_mipi_enable - Enable the Tegra MIPI calibration device. + * @device: Handle to the Tegra MIPI calibration device. + * + * This calls the enable sequence for the Tegra MIPI calibration device. + * + * Returns 0 on success or a negative error code on failure. + */ +int tegra_mipi_enable(struct tegra_mipi_device *device) +{ + if (device->ops->enable) + return device->ops->enable(device); + + return 0; +} +EXPORT_SYMBOL(tegra_mipi_enable); + +/** + * tegra_mipi_disable - Disable the Tegra MIPI calibration device. + * @device: Handle to the Tegra MIPI calibration device. + * + * This calls the disable sequence for the Tegra MIPI calibration device. + * + * Returns 0 on success or a negative error code on failure. + */ +int tegra_mipi_disable(struct tegra_mipi_device *device) +{ + if (device->ops->disable) + return device->ops->disable(device); + + return 0; +} +EXPORT_SYMBOL(tegra_mipi_disable); + +/** + * tegra_mipi_start_calibration - Start the Tegra MIPI calibration sequence. + * @device: Handle to the Tegra MIPI calibration device. + * + * This initiates the calibration of CSI/DSI interfaces via the Tegra MIPI + * calibration device. + * + * Returns 0 on success or a negative error code on failure. + */ +int tegra_mipi_start_calibration(struct tegra_mipi_device *device) +{ + if (device->ops->start_calibration) + return device->ops->start_calibration(device); + + return 0; +} +EXPORT_SYMBOL(tegra_mipi_start_calibration); + +/** + * tegra_mipi_finish_calibration - Finish the Tegra MIPI calibration sequence. + * @device: Handle to the Tegra MIPI calibration device. + * + * This completes the calibration of CSI/DSI interfaces via the Tegra MIPI + * calibration device. + * + * Returns 0 on success or a negative error code on failure. + */ +int tegra_mipi_finish_calibration(struct tegra_mipi_device *device) +{ + if (device->ops->finish_calibration) + return device->ops->finish_calibration(device); + + return 0; +} +EXPORT_SYMBOL(tegra_mipi_finish_calibration); + +/** + * tegra_mipi_request - Request a Tegra MIPI calibration device. + * @device: Handle of the device requesting the MIPI calibration function. + * @np: Device node pointer of the device requesting the MIPI calibration + * function. + * + * This function requests a reference to a Tegra MIPI calibration device. + * + * Returns a pointer to the Tegra MIPI calibration device on success, + * or an ERR_PTR-encoded error code on failure. + */ +struct tegra_mipi_device *tegra_mipi_request(struct device *device, + struct device_node *np) +{ + struct tegra_mipi_device *mipidev; + struct of_phandle_args args; + int err; + + err = of_parse_phandle_with_args(np, "nvidia,mipi-calibrate", + "#nvidia,mipi-calibrate-cells", 0, + &args); + if (err < 0) + return ERR_PTR(err); + + if (provider.np != args.np) { + err = -ENODEV; + goto out; + } + + mipidev = kzalloc_obj(*mipidev); + if (!mipidev) { + err = -ENOMEM; + goto out; + } + + mipidev->pdev = of_find_device_by_node(args.np); + if (!mipidev->pdev) { + err = -ENODEV; + goto free; + } + + of_node_put(args.np); + + mipidev->ops = provider.ops; + mipidev->pads = args.args[0]; + + return mipidev; + +free: + kfree(mipidev); +out: + of_node_put(args.np); + return ERR_PTR(err); +} +EXPORT_SYMBOL(tegra_mipi_request); + +/** + * tegra_mipi_free - Free a Tegra MIPI calibration device. + * @mipidev: Handle to the Tegra MIPI calibration device. + * + * This function releases a reference to a Tegra MIPI calibration device + * previously requested by tegra_mipi_request(). + */ +void tegra_mipi_free(struct tegra_mipi_device *mipidev) +{ + platform_device_put(mipidev->pdev); + kfree(mipidev); +} +EXPORT_SYMBOL(tegra_mipi_free); + +static void tegra_mipi_remove_provider(void *data) +{ + provider.np = NULL; + provider.ops = NULL; +} + +/** + * devm_tegra_mipi_add_provider - Managed registration of a Tegra MIPI + * calibration function provider. + * @device: Handle to the device providing the MIPI calibration function. + * @np: Device node pointer of the device providing the MIPI calibration + * function. + * @ops: Operations supported by the MIPI calibration device. + * + * This registers a device that provides MIPI calibration functions. + * For Tegra20 and Tegra30, this is the CSI block, while Tegra114 and + * newer SoC generations have a dedicated hardware block for these + * functions. + * + * Returns 0 on success or a negative error code on failure. + */ +int devm_tegra_mipi_add_provider(struct device *device, struct device_node *np, + const struct tegra_mipi_ops *ops) +{ + if (provider.np) + return -EBUSY; + + provider.np = np; + provider.ops = ops; + + return devm_add_action_or_reset(device, tegra_mipi_remove_provider, NULL); +} +EXPORT_SYMBOL(devm_tegra_mipi_add_provider); |
