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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
| commit | f4cdf7ca9a1fdcca413157df19753f388a5a224e (patch) | |
| tree | 60a31895b2446cd7fa27514e8c2843534a0de0da /drivers/gpu/host1x/mipi.c | |
| download | linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.tar.gz linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.zip | |
Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediagrafted
Pull media updates from Mauro Carvalho Chehab:
- v4l2-core: added ISP statistics support and per-block validation
- v4l2-core: Allow unknown HDR10 white point and luminance
- New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor
- New codec: Milos: VPU v2.0 codec support
- isp driver: gained support for Dreamchip RPPX1 ISP framework
- vsp1 driver: gained support for RZ/T2H and RZ/N2H
- Novalake driver: gained CVS support for new NVL hardware
- dvb-core: fix feed leak on failed DMX_ADD_PID
- several driver fixes, cleanups and minor improvements
* tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits)
media: ipu-bridge: check all DMI entries when overriding sensor rotation
media: v4l2-async: avoid deleting unlinked ASC entry on link error
media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement
media: intel/ipu6: fix async notifier cleanup leak on parse error
media: staging/ipu7: fix async notifier UAF on probe error path
media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path
media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem()
media: rcar-isp: Fix VSPX reference leaks
media: rcar-isp: Release ISPCORE resources
media: i2c: imx415: Release runtime PM reference on VBLANK error
media: i2c: imx415: Return test pattern write errors
media: renesas: vsp1: Declare index variables in for loop statement
media: renesas: vsp1: Make reset control optional to support platforms without a reset line
media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs
media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs
media: nxp: imx8-isi: Add additional 32-bit RGB format support
media: nxp: imx8-isi: Add 16-bit raw Bayer format support
media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams
media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks
media: nxp: imx8-isi: Correct color map between V4L2 and ISI
...
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); |
