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