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105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright (c) 2024 Hisilicon Limited.
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#include <linux/debugfs.h>
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#include <linux/device.h>
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#include <linux/seq_file.h>
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#include <linux/pci.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_file.h>
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#include <drm/drm_debugfs.h>
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#include <drm/drm_edid.h>
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#include "hibmc_drm_drv.h"
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#define MAX_BUF_SIZE 12
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static ssize_t hibmc_control_write(struct file *file, const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct hibmc_drm_private *priv = file_inode(file)->i_private;
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struct hibmc_dp_cbar_cfg *cfg = &priv->dp.cfg;
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int ret, idx;
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u8 buf[MAX_BUF_SIZE];
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if (count >= MAX_BUF_SIZE)
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return -EINVAL;
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if (copy_from_user(buf, user_buf, count))
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return -EFAULT;
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buf[count] = '\0';
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/* Only 4 parameters is allowed, the ranger are as follow:
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* [0] enable/disable colorbar feature
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0: enable colorbar, 1: disable colorbar
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* [1] the timing source of colorbar displaying
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0: timing follows XDP, 1: internal self timing
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* [2] the movment of colorbar displaying
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0: static colorbar image,
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* 1~255: right shifting a type of color per (1~255)frames
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* [3] the color type of colorbar displaying
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0~9: color bar, white, red, orange,
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* yellow, green, cyan, bule, pupper, black
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*/
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if (sscanf(buf, "%hhu %hhu %hhu %u", &cfg->enable, &cfg->self_timing,
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&cfg->dynamic_rate, &cfg->pattern) != 4) {
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return -EINVAL;
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}
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if (cfg->pattern > 9 || cfg->enable > 1 || cfg->self_timing > 1)
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return -EINVAL;
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ret = drm_dev_enter(&priv->dev, &idx);
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if (!ret)
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return -ENODEV;
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hibmc_dp_set_cbar(&priv->dp, cfg);
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drm_dev_exit(idx);
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return count;
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}
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static int hibmc_dp_dbgfs_show(struct seq_file *m, void *arg)
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{
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struct hibmc_drm_private *priv = m->private;
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struct hibmc_dp_cbar_cfg *cfg = &priv->dp.cfg;
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int idx;
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if (!drm_dev_enter(&priv->dev, &idx))
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return -ENODEV;
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seq_printf(m, "hibmc dp colorbar cfg: %u %u %u %u\n", cfg->enable, cfg->self_timing,
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cfg->dynamic_rate, cfg->pattern);
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drm_dev_exit(idx);
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return 0;
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}
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static int hibmc_open(struct inode *inode, struct file *filp)
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{
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return single_open(filp, hibmc_dp_dbgfs_show, inode->i_private);
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}
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static const struct file_operations hibmc_dbg_fops = {
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.owner = THIS_MODULE,
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.write = hibmc_control_write,
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.read = seq_read,
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.open = hibmc_open,
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.llseek = seq_lseek,
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.release = single_release,
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};
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void hibmc_debugfs_init(struct drm_connector *connector, struct dentry *root)
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{
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struct drm_device *dev = connector->dev;
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struct hibmc_drm_private *priv = to_hibmc_drm_private(dev);
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/* create the file in drm directory, so we don't need to remove manually */
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debugfs_create_file("colorbar-cfg", 0200,
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root, priv, &hibmc_dbg_fops);
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}
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