diff --git a/linux-5.10/rk3568_patch/kernel.patch b/linux-5.10/rk3568_patch/kernel.patch
index f9e165016e9f1c205cc6e6a7adcef30b1a741727..cdb4eafc2a6be3f1b40ed62466246d8ed795df4d 100644
--- a/linux-5.10/rk3568_patch/kernel.patch
+++ b/linux-5.10/rk3568_patch/kernel.patch
@@ -1580730,7 +1580730,7 @@ diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_
 index 110a19c51..dd41c694c 100644
 --- a/drivers/tty/serial/8250/8250_port.c
 +++ b/drivers/tty/serial/8250/8250_port.c
-@@ -1567,8 +1567,13 @@ static inline void __start_tx(struct uart_port *port)
+@@ -1538,8 +1538,13 @@ static inline void __start_tx(struct uart_port *port)
  {
  	struct uart_8250_port *up = up_to_u8250p(port);
  
@@ -1580744,7 +1580744,7 @@ index 110a19c51..dd41c694c 100644
  
  	if (serial8250_set_THRI(up)) {
  		if (up->bugs & UART_BUG_TXEN) {
-@@ -1888,6 +1893,12 @@ EXPORT_SYMBOL_GPL(serial8250_modem_status);
+@@ -1869,6 +1874,12 @@ EXPORT_SYMBOL_GPL(serial8250_modem_status);
  
  static bool handle_rx_dma(struct uart_8250_port *up, unsigned int iir)
  {
@@ -1580755,9 +1580755,9 @@ index 110a19c51..dd41c694c 100644
 +		return up->dma->rx_dma(up);
 +#else
  	switch (iir & 0x3f) {
- 	case UART_IIR_RX_TIMEOUT:
- 		serial8250_rx_dma_flush(up);
-@@ -1896,6 +1907,7 @@ static bool handle_rx_dma(struct uart_8250_port *up, unsigned int iir)
+ 	case UART_IIR_RDI:
+ 		if (!up->dma->rx_running)
+@@ -1880,6 +1891,7 @@ static bool handle_rx_dma(struct uart_8250_port *up, unsigned int iir)
  		return true;
  	}
  	return up->dma->rx_dma(up);
@@ -1580765,17 +1580765,17 @@ index 110a19c51..dd41c694c 100644
  }
  
  /*
-@@ -1906,7 +1918,9 @@ int serial8250_handle_irq(struct uart_port *port, unsigned int iir)
- 	unsigned char status;
+@@ -1891,7 +1903,9 @@ int serial8250_handle_irq(struct uart_port *port, unsigned int iir)
  	unsigned long flags;
  	struct uart_8250_port *up = up_to_u8250p(port);
+ 	struct tty_port *tport = &port->state->port;
 +#ifndef CONFIG_ARCH_ROCKCHIP
  	bool skip_rx = false;
 +#endif
  
  	if (iir & UART_IIR_NO_INT)
  		return 0;
-@@ -1915,6 +1929,17 @@ int serial8250_handle_irq(struct uart_port *port, unsigned int iir)
+@@ -1900,6 +1914,17 @@ int serial8250_handle_irq(struct uart_port *port, unsigned int iir)
  
  	status = serial_port_in(port, UART_LSR);
  
@@ -1580793,7 +1580793,7 @@ index 110a19c51..dd41c694c 100644
  	/*
  	 * If port is stopped and there are no error conditions in the
  	 * FIFO, then don't drain the FIFO, as this may lead to TTY buffer
-@@ -1932,11 +1957,34 @@ int serial8250_handle_irq(struct uart_port *port, unsigned int iir)
+@@ -1922,11 +1947,34 @@ int serial8250_handle_irq(struct uart_port *port, unsigned int iir)
  		if (!up->dma || handle_rx_dma(up, iir))
  			status = serial8250_rx_chars(up, status);
  	}
@@ -1580830,7 +1580830,7 @@ index 110a19c51..dd41c694c 100644
  	uart_unlock_and_check_sysrq(port, flags);
  	return 1;
  }
-@@ -2412,7 +2460,11 @@ int serial8250_do_startup(struct uart_port *port)
+@@ -2400,7 +2448,11 @@ int serial8250_do_startup(struct uart_port *port)
  		if (uart_console(port))
  			msg = "forbid DMA for kernel console";
  		else if (serial8250_request_dma(up))
@@ -1580842,7 +1580842,7 @@ index 110a19c51..dd41c694c 100644
  		if (msg) {
  			dev_warn_ratelimited(port->dev, "%s\n", msg);
  			up->dma = NULL;
-@@ -2606,6 +2658,10 @@ void serial8250_do_set_divisor(struct uart_port *port, unsigned int baud,
+@@ -2594,6 +2646,10 @@ void serial8250_do_set_divisor(struct uart_port *port, unsigned int baud,
  {
  	struct uart_8250_port *up = up_to_u8250p(port);
  
@@ -1580853,7 +1580853,7 @@ index 110a19c51..dd41c694c 100644
  	/* Workaround to enable 115200 baud on OMAP1510 internal ports */
  	if (is_omap1510_8250(up)) {
  		if (baud == 115200) {
-@@ -2625,6 +2681,17 @@ void serial8250_do_set_divisor(struct uart_port *port, unsigned int baud,
+@@ -2613,6 +2669,17 @@ void serial8250_do_set_divisor(struct uart_port *port, unsigned int baud,
  		serial_port_out(port, UART_LCR, up->lcr | UART_LCR_DLAB);
  
  	serial_dl_write(up, quot);
@@ -1580871,7 +1580871,7 @@ index 110a19c51..dd41c694c 100644
  }
  EXPORT_SYMBOL_GPL(serial8250_do_set_divisor);
  
-@@ -2804,6 +2871,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
+@@ -2792,6 +2859,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
  	if ((termios->c_cflag & CREAD) == 0)
  		port->ignore_status_mask |= UART_LSR_DR;
  
@@ -1580879,7 +1580879,7 @@ index 110a19c51..dd41c694c 100644
  	/*
  	 * CTS flow control flag and modem status interrupts
  	 */
-@@ -2817,6 +2885,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
+@@ -2805,6 +2873,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
  		up->ier |= UART_IER_RTOIE;
  
  	serial_port_out(port, UART_IER, up->ier);
@@ -1580887,7 +1580887,7 @@ index 110a19c51..dd41c694c 100644
  
  	if (up->capabilities & UART_CAP_EFR) {
  		unsigned char efr = 0;
-@@ -2835,16 +2904,25 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
+@@ -2823,16 +2892,25 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
  			serial_port_out(port, UART_EFR, efr);
  	}
  
@@ -1580915,7 +1580915,7 @@ index 110a19c51..dd41c694c 100644
  	if (port->type != PORT_16750) {
  		/* emulated UARTs (Lucent Venus 167x) need two steps */
  		if (up->fcr & UART_FCR_ENABLE_FIFO)
-@@ -2852,6 +2930,23 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
+@@ -2840,6 +2918,23 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
  		serial_port_out(port, UART_FCR, up->fcr);	/* set fcr */
  	}
  	serial8250_set_mctrl(port, port->mctrl);