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usb: dwc3: debugfs: Add suppot for Enabling L1 in HS through debugfs

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Currently the kernel implementation disables L1 in HS since
there are target which does not support gadget L1.
However, implementing this leads to Ch9 compliance
failures.
Therefore implementing a debugfs parameter through which
this can be controlled, when testing for compliance it can
be set to true and carry out the tests.

Change-Id: I9cf9c49737b18ca889fcc1dbe8232a7bb999f35c
Signed-off-by: Udipto Goswami <ugoswami@codeaurora.org>
This commit is contained in:
Udipto Goswami 2021-08-03 20:55:05 +05:30 • committed by Gerrit - the friendly Code Review server
commit 759851525d
1 changed files with 47 additions and 0 deletions
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47
drivers/usb/dwc3/debugfs.c
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@ -1227,6 +1227,51 @@ static const struct file_operations dwc3_gadget_int_events_fops = {
.release = single_release,
};
static ssize_t dwc3_gadget_l1_store(struct file *file,
const char __user *ubuf, size_t count, loff_t *ppos)
{
struct seq_file *s = file->private_data;
struct dwc3 *dwc = s->private;
bool enable_l1;
int ret;
ret = kstrtobool_from_user(ubuf, count, &enable_l1);
if (ret < 0) {
dev_err(dwc->dev, "%s: can't get entered value: %d\n",
__func__, ret);
return ret;
}
dwc->gadget.lpm_capable = enable_l1;
dwc->usb2_gadget_lpm_disable = !enable_l1;
pr_info("dwc3 gadget lpm : %s. Perform a plugout/plugin\n",
enable_l1 ? "enabled" : "disabled");
return count;
}
static int dwc3_gadget_l1_status_show(struct seq_file *s, void *unused)
{
struct dwc3 *dwc = s->private;
seq_printf(s, "%d\n", dwc->gadget.lpm_capable);
return 0;
}
static int dwc3_gadget_l1_open(struct inode *inode, struct file *f)
{
return single_open(f, dwc3_gadget_l1_status_show, inode->i_private);
}
static const struct file_operations dwc3_l1_enable_ops = {
.open = dwc3_gadget_l1_open,
.write = dwc3_gadget_l1_store,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
void dwc3_debugfs_init(struct dwc3 *dwc)
{
struct dentry *root;
@ -1255,6 +1300,8 @@ void dwc3_debugfs_init(struct dwc3 *dwc)
debugfs_create_file("lsp_dump", S_IRUGO | S_IWUSR, root, dwc,
&dwc3_lsp_fops);
debugfs_create_file("enable_l1_suspend", 0644, root, dwc,
&dwc3_l1_enable_ops);
if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) {
debugfs_create_file("mode", S_IRUGO | S_IWUSR, root, dwc,