/* SPDX-License-Identifier: GPL-2.0-only */ #ifndef __SOC_NVIDIA_TEGRA124_CHIP_H__ #define __SOC_NVIDIA_TEGRA124_CHIP_H__ #include <gpio.h> #include <soc/addressmap.h> #define EFAULT 1 #define EINVAL 2 /* this is a misuse of the device tree. We're going to let it go for now but * we should at minimum have a struct for the display controller, since * the chip supports two. */ struct soc_nvidia_tegra124_config { u32 xres; u32 yres; u32 framebuffer_bits_per_pixel; u32 color_depth; u32 panel_bits_per_pixel; /* there are two. It's not unimaginable that we might someday * have two of these structs in a single mainboard. */ u32 display_controller; u32 framebuffer_base; /* Technically, we can compute this. At the same time, some platforms * might want to specify a specific size for their own reasons. If it is * zero the soc code will compute it as xres*yres*framebuffer_bits_per_pixel/4 */ u32 framebuffer_size; /* GPIOs -- all, some, or none are used. Unused ones can be ignored * in devicetree.cb since if they are not set there they default to 0, * and 0 for a gpio means 'unused GPIO'. */ gpio_t backlight_en_gpio; gpio_t lvds_shutdown_gpio; gpio_t backlight_vdd_gpio; gpio_t panel_vdd_gpio; /* required info. */ /* pwm to use to set display contrast */ int pwm; /* timings -- five numbers, all relative to the previous * event, not to absolute time. e.g., vdd_data_delay is the * delay from vdd on to data, not from power on to data. * This is stated to be four timings in the * u-boot docs. In any event, in coreboot, we generally * only delay long enough to let the panel wake up and then * do the control operations -- meaning, for *coreboot* * we probably only need the vdd_delay, but payloads may * need the other info. */ /* Delay before from power on asserting vdd */ int vdd_delay_ms; /* Delay between pwm and backlight_en_gpio is asserted */ int pwm_to_bl_delay_ms; /* Delay before HPD high */ int vdd_to_hpd_delay_ms; int hpd_unplug_min_us; int hpd_plug_min_us; int hpd_irq_min_us; int href_to_sync; int hsync_width; int hback_porch; int hfront_porch; int vref_to_sync; int vsync_width; int vback_porch; int vfront_porch; int pixel_clock; /* The minimum link configuration settings */ u32 lane_count; u32 enhanced_framing; u32 link_bw; u32 drive_current; u32 preemphasis; u32 postcursor; void *dc_data; }; #endif /* __SOC_NVIDIA_TEGRA124_CHIP_H__ */