// SPDX-License-Identifier: GPL-2.0+ // Copyright 2018 IBM Corporation #include <linux/clk.h> #include <linux/dma-mapping.h> #include <linux/irq.h> #include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/of_reserved_mem.h> #include <linux/platform_device.h> #include <linux/property.h> #include <linux/regmap.h> #include <linux/reset.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_device.h> #include <drm/drm_fbdev_dma.h> #include <drm/drm_gem_dma_helper.h> #include <drm/drm_gem_framebuffer_helper.h> #include <drm/drm_module.h> #include <drm/drm_probe_helper.h> #include <drm/drm_simple_kms_helper.h> #include <drm/drm_vblank.h> #include <drm/drm_drv.h> #include "aspeed_gfx.h" /** * DOC: ASPEED GFX Driver * * This driver is for the ASPEED BMC SoC's 'GFX' display hardware, also called * the 'SOC Display Controller' in the datasheet. This driver runs on the ARM * based BMC systems, unlike the ast driver which runs on a host CPU and is for * a PCIe graphics device. * * The AST2500 supports a total of 3 output paths: * * 1. VGA output, the output target can choose either or both to the DAC * or DVO interface. * * 2. Graphics CRT output, the output target can choose either or both to * the DAC or DVO interface. * * 3. Video input from DVO, the video input can be used for video engine * capture or DAC display output. * * Output options are selected in SCU2C. * * The "VGA mode" device is the PCI attached controller. The "Graphics CRT" * is the ARM's internal display controller. * * The driver only supports a simple configuration consisting of a 40MHz * pixel clock, fixed by hardware limitations, and the VGA output path. * * The driver was written with the 'AST2500 Software Programming Guide' v17, * which is available under NDA from ASPEED. */ struct aspeed_gfx_config { … }; static const struct aspeed_gfx_config ast2400_config = …; static const struct aspeed_gfx_config ast2500_config = …; static const struct aspeed_gfx_config ast2600_config = …; static const struct of_device_id aspeed_gfx_match[] = …; MODULE_DEVICE_TABLE(of, aspeed_gfx_match); static const struct drm_mode_config_funcs aspeed_gfx_mode_config_funcs = …; static int aspeed_gfx_setup_mode_config(struct drm_device *drm) { … } static irqreturn_t aspeed_gfx_irq_handler(int irq, void *data) { … } static int aspeed_gfx_load(struct drm_device *drm) { … } static void aspeed_gfx_unload(struct drm_device *drm) { … } DEFINE_DRM_GEM_DMA_FOPS(fops); static const struct drm_driver aspeed_gfx_driver = …; static ssize_t dac_mux_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t dac_mux_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RW(dac_mux); static ssize_t vga_pw_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(vga_pw); static struct attribute *aspeed_sysfs_entries[] = …; static struct attribute_group aspeed_sysfs_attr_group = …; static int aspeed_gfx_probe(struct platform_device *pdev) { … } static void aspeed_gfx_remove(struct platform_device *pdev) { … } static void aspeed_gfx_shutdown(struct platform_device *pdev) { … } static struct platform_driver aspeed_gfx_platform_driver = …; drm_module_platform_driver(…); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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