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path: root/drivers/gpu/drm/pl111/pl111_vexpress.c
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Diffstat (limited to 'drivers/gpu/drm/pl111/pl111_vexpress.c')
-rw-r--r--drivers/gpu/drm/pl111/pl111_vexpress.c96
1 files changed, 0 insertions, 96 deletions
diff --git a/drivers/gpu/drm/pl111/pl111_vexpress.c b/drivers/gpu/drm/pl111/pl111_vexpress.c
deleted file mode 100644
index 37ed3f1da820..000000000000
--- a/drivers/gpu/drm/pl111/pl111_vexpress.c
+++ /dev/null
@@ -1,96 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Versatile Express PL111 handling
- * Copyright (C) 2018 Linus Walleij
- *
- * This module binds to the "arm,vexpress-muxfpga" device on the
- * Versatile Express configuration bus and sets up which CLCD instance
- * gets muxed out on the DVI bridge.
- */
-#include <linux/device.h>
-#include <linux/module.h>
-#include <linux/regmap.h>
-#include <linux/vexpress.h>
-#include <linux/platform_device.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_platform.h>
-#include "pl111_drm.h"
-#include "pl111_vexpress.h"
-
-#define VEXPRESS_FPGAMUX_MOTHERBOARD 0x00
-#define VEXPRESS_FPGAMUX_DAUGHTERBOARD_1 0x01
-#define VEXPRESS_FPGAMUX_DAUGHTERBOARD_2 0x02
-
-int pl111_vexpress_clcd_init(struct device *dev,
- struct pl111_drm_dev_private *priv,
- struct regmap *map)
-{
- struct device_node *root;
- struct device_node *child;
- struct device_node *ct_clcd = NULL;
- bool has_coretile_clcd = false;
- bool has_coretile_hdlcd = false;
- bool mux_motherboard = true;
- u32 val;
- int ret;
-
- /*
- * Check if we have a CLCD or HDLCD on the core tile by checking if a
- * CLCD or HDLCD is available in the root of the device tree.
- */
- root = of_find_node_by_path("/");
- if (!root)
- return -EINVAL;
-
- for_each_available_child_of_node(root, child) {
- if (of_device_is_compatible(child, "arm,pl111")) {
- has_coretile_clcd = true;
- ct_clcd = child;
- break;
- }
- if (of_device_is_compatible(child, "arm,hdlcd")) {
- has_coretile_hdlcd = true;
- of_node_put(child);
- break;
- }
- }
-
- of_node_put(root);
-
- /*
- * If there is a coretile HDLCD and it has a driver,
- * do not mux the CLCD on the motherboard to the DVI.
- */
- if (has_coretile_hdlcd && IS_ENABLED(CONFIG_DRM_HDLCD))
- mux_motherboard = false;
-
- /*
- * On the Vexpress CA9 we let the CLCD on the coretile
- * take precedence, so also in this case do not mux the
- * motherboard to the DVI.
- */
- if (has_coretile_clcd)
- mux_motherboard = false;
-
- if (mux_motherboard) {
- dev_info(dev, "DVI muxed to motherboard CLCD\n");
- val = VEXPRESS_FPGAMUX_MOTHERBOARD;
- } else if (ct_clcd == dev->of_node) {
- dev_info(dev,
- "DVI muxed to daughterboard 1 (core tile) CLCD\n");
- val = VEXPRESS_FPGAMUX_DAUGHTERBOARD_1;
- } else {
- dev_info(dev, "core tile graphics present\n");
- dev_info(dev, "this device will be deactivated\n");
- return -ENODEV;
- }
-
- ret = regmap_write(map, 0, val);
- if (ret) {
- dev_err(dev, "error setting DVI muxmode\n");
- return -ENODEV;
- }
-
- return 0;
-}