// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2016 Broadcom Limited */ /** * DOC: VC4 DPI module * * The VC4 DPI hardware supports MIPI DPI type 4 and Nokia ViSSI * signals. On BCM2835, these can be routed out to GPIO0-27 with the * ALT2 function. */ #include <drm/drm_atomic_helper.h> #include <drm/drm_bridge.h> #include <drm/drm_drv.h> #include <drm/drm_edid.h> #include <drm/drm_of.h> #include <drm/drm_panel.h> #include <drm/drm_probe_helper.h> #include <drm/drm_simple_kms_helper.h> #include <linux/clk.h> #include <linux/component.h> #include <linux/media-bus-format.h> #include <linux/mod_devicetable.h> #include <linux/platform_device.h> #include "vc4_drv.h" #include "vc4_regs.h" #define DPI_C … #define DPI_OUTPUT_ENABLE_MODE … /* The order field takes the incoming 24 bit RGB from the pixel valve * and shuffles the 3 channels. */ #define DPI_ORDER_MASK … #define DPI_ORDER_SHIFT … #define DPI_ORDER_RGB … #define DPI_ORDER_BGR … #define DPI_ORDER_GRB … #define DPI_ORDER_BRG … /* The format field takes the ORDER-shuffled pixel valve data and * formats it onto the output lines. */ #define DPI_FORMAT_MASK … #define DPI_FORMAT_SHIFT … /* This define is named in the hardware, but actually just outputs 0. */ #define DPI_FORMAT_9BIT_666_RGB … /* Outputs 00000000rrrrrggggggbbbbb */ #define DPI_FORMAT_16BIT_565_RGB_1 … /* Outputs 000rrrrr00gggggg000bbbbb */ #define DPI_FORMAT_16BIT_565_RGB_2 … /* Outputs 00rrrrr000gggggg00bbbbb0 */ #define DPI_FORMAT_16BIT_565_RGB_3 … /* Outputs 000000rrrrrrggggggbbbbbb */ #define DPI_FORMAT_18BIT_666_RGB_1 … /* Outputs 00rrrrrr00gggggg00bbbbbb */ #define DPI_FORMAT_18BIT_666_RGB_2 … /* Outputs rrrrrrrrggggggggbbbbbbbb */ #define DPI_FORMAT_24BIT_888_RGB … /* Reverses the polarity of the corresponding signal */ #define DPI_PIXEL_CLK_INVERT … #define DPI_HSYNC_INVERT … #define DPI_VSYNC_INVERT … #define DPI_OUTPUT_ENABLE_INVERT … /* Outputs the signal the falling clock edge instead of rising. */ #define DPI_HSYNC_NEGATE … #define DPI_VSYNC_NEGATE … #define DPI_OUTPUT_ENABLE_NEGATE … /* Disables the signal */ #define DPI_HSYNC_DISABLE … #define DPI_VSYNC_DISABLE … #define DPI_OUTPUT_ENABLE_DISABLE … /* Power gate to the device, full reset at 0 -> 1 transition */ #define DPI_ENABLE … /* All other registers besides DPI_C return the ID */ #define DPI_ID … #define DPI_ID_VALUE … /* General DPI hardware state. */ struct vc4_dpi { … }; #define to_vc4_dpi(_encoder) … #define DPI_READ(offset) … #define DPI_WRITE(offset, val) … static const struct debugfs_reg32 dpi_regs[] = …; static void vc4_dpi_encoder_disable(struct drm_encoder *encoder) { … } static void vc4_dpi_encoder_enable(struct drm_encoder *encoder) { … } static enum drm_mode_status vc4_dpi_encoder_mode_valid(struct drm_encoder *encoder, const struct drm_display_mode *mode) { … } static const struct drm_encoder_helper_funcs vc4_dpi_encoder_helper_funcs = …; static int vc4_dpi_late_register(struct drm_encoder *encoder) { … } static const struct drm_encoder_funcs vc4_dpi_encoder_funcs = …; static const struct of_device_id vc4_dpi_dt_match[] = …; /* Sets up the next link in the display chain, whether it's a panel or * a bridge. */ static int vc4_dpi_init_bridge(struct vc4_dpi *dpi) { … } static void vc4_dpi_disable_clock(void *ptr) { … } static int vc4_dpi_bind(struct device *dev, struct device *master, void *data) { … } static const struct component_ops vc4_dpi_ops = …; static int vc4_dpi_dev_probe(struct platform_device *pdev) { … } static void vc4_dpi_dev_remove(struct platform_device *pdev) { … } struct platform_driver vc4_dpi_driver = …;
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