static int hva40wv1_dsi_dcs_write_command(struct mcde_display_device *ddev, u8 cmd, u8* p_data, int len)
{
int write_len;
int ret = 0;
write_len = len;
if (write_len > MAX_DCS_CMD_ALLOWED)
write_len = MAX_DCS_CMD_ALLOWED;
ret = mcde_dsi_dcs_write(ddev->chnl_state, cmd, p_data, write_len);
len -= write_len;
p_data += write_len;
while ((len > 0) && (ret == 0)) {
write_len = len;
if (write_len > MAX_DCS_CMD_ALLOWED)
write_len = MAX_DCS_CMD_ALLOWED;
ret = mcde_dsi_generic_write(ddev->chnl_state, p_data, write_len);
len -= write_len;
p_data += write_len;
}
if (ret != 0)
dev_err(&ddev->dev, "failed to send DCS command (0x%x)\n", cmd);
else
dev_vdbg(&ddev->dev, "Sent DCS cmd (0x%x)\n", cmd);
return ret;
}
static ssize_t reg_write(struct file *file, const char __user *ubuf,
size_t count, loff_t *ppos)
{
struct seq_file *s = file->private_data;
struct mcde_display_device *ddev = s->private;
struct device *dev;
struct mcde_chnl_state *chnl;
char *buf;
const char *p;
enum dbg_cmd_type cmd;
u8 data[MCDE_MAX_DSI_DIRECT_CMD_WRITE + 1]; /* Make room for cmd */
int i = 0;
int ret;
char tmp[TMP_BUF_SZ];
if (!ddev || !&ddev->dev) {
pr_err("%s: no device\n", __func__);
ret = -ENODEV;
goto exit;
}
chnl = ddev->chnl_state;
dev = &ddev->dev;
dev_dbg(dev, "%s\n", __func__);
reset_res_buf();
buf = kzalloc(sizeof(char) * count, GFP_KERNEL);
if (!buf) {
dev_err(dev, "%s: Failed to allocate buffer\n", __func__);
ret = -ENOMEM;
goto exit;
}
dev_dbg(dev, "%s: buf = %p, ubuf = %p, count = %d, "
"sizeof(char) * count = %d, line = %d\n",
__func__, buf, ubuf, count, sizeof(char) * count, __LINE__);
if (copy_from_user(buf, ubuf, count)) {
ret = -EFAULT;
goto fail_free_mem;
}
p = buf;
if (!strncmp(buf, "dcs", 3)) {
dev_dbg(dev, "%s: dcs\n", __func__);
cmd = DCS;
} else if (!strncmp(buf, "gen", 3)) {
dev_dbg(dev, "%s: gen\n", __func__);
cmd = GEN;
} else {
update_res_buf("Write - unknown type\n");
ret = -EFAULT;
goto fail_free_mem;
}
p = p+4;
/* Get first param, Register */
if (sscanf(p, "%4hhx", &data[0]) != 1) {
update_res_buf("Write - parameter error\n");
ret = -EINVAL;
goto fail_free_mem;
}
i++;
while (isxdigit(*p) || (*p == 'x'))
p++;
/* Get data */
while (true) {
if (isspace(*p)) {
p++;
} else {
if (sscanf(p, "%4hhx", &data[i]) == 1) {
while (isxdigit(*p) || (*p == 'x'))
p++;
}
i++;
}
if (iscntrl(*p))
break;
if (i > MCDE_MAX_DSI_DIRECT_CMD_WRITE) {
update_res_buf("Write - Too many parameters\n");
ret = -EINVAL;
goto fail_free_mem;
}
}
if (cmd == DCS) {
if (i == 1)
ret = mcde_dsi_dcs_write(chnl, data[0], NULL, 0);
else
ret = mcde_dsi_dcs_write(chnl, data[0], &data[1],
i - 1);
} else {
ret = mcde_dsi_generic_write(chnl, data, i);
}
if (!ret) {
print_params(cmd, data[0], i - 1, &data[1]);
} else {
snprintf(tmp, sizeof(tmp), "Write failed, ret = %d!\n", ret);
update_res_buf(tmp);
}
fail_free_mem:
kfree(buf);
exit:
return count;
}
