disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/tty/serial/8250/8250.h
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@@ -156,49 +156,6 @@
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 	up->dl_write(up, value);
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 }
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-static inline void serial8250_set_IER(struct uart_8250_port *up,
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-				      unsigned char ier)
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-{
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-	struct uart_port *port = &up->port;
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-	unsigned int flags;
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-	bool is_console;
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-
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-	is_console = uart_console(port);
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-
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-	if (is_console)
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-		console_atomic_lock(&flags);
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-
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-	serial_out(up, UART_IER, ier);
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-
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-	if (is_console)
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-		console_atomic_unlock(flags);
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-}
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-
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-static inline unsigned char serial8250_clear_IER(struct uart_8250_port *up)
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-{
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-	struct uart_port *port = &up->port;
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-	unsigned int clearval = 0;
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-	unsigned int prior;
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-	unsigned int flags;
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-	bool is_console;
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-
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-	is_console = uart_console(port);
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-
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-	if (up->capabilities & UART_CAP_UUE)
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-		clearval = UART_IER_UUE;
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-
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-	if (is_console)
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-		console_atomic_lock(&flags);
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-
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-	prior = serial_port_in(port, UART_IER);
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-	serial_port_out(port, UART_IER, clearval);
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-
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-	if (is_console)
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-		console_atomic_unlock(flags);
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-
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-	return prior;
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-}
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-
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 static inline bool serial8250_set_THRI(struct uart_8250_port *up)
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 {
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 	if (up->ier & UART_IER_THRI)
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@@ -207,7 +164,7 @@
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 #if defined(CONFIG_ARCH_ROCKCHIP) && defined(CONFIG_NO_GKI)
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 	up->ier |= UART_IER_PTIME;
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 #endif
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-	serial8250_set_IER(up, up->ier);
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+	serial_out(up, UART_IER, up->ier);
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 	return true;
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 }
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@@ -219,7 +176,7 @@
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 #if defined(CONFIG_ARCH_ROCKCHIP) && defined(CONFIG_NO_GKI)
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 	up->ier &= ~UART_IER_PTIME;
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 #endif
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-	serial8250_set_IER(up, up->ier);
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+	serial_out(up, UART_IER, up->ier);
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 	return true;
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 }
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182
 
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@@ -385,6 +342,13 @@
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 extern void serial8250_rx_dma_flush(struct uart_8250_port *);
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 extern int serial8250_request_dma(struct uart_8250_port *);
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 extern void serial8250_release_dma(struct uart_8250_port *);
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+
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+static inline bool serial8250_tx_dma_running(struct uart_8250_port *p)
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+{
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+	struct uart_8250_dma *dma = p->dma;
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+
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+	return dma && dma->tx_running;
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+}
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 #else
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 static inline int serial8250_tx_dma(struct uart_8250_port *p)
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 {
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@@ -406,6 +370,11 @@
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 	return -1;
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 }
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 static inline void serial8250_release_dma(struct uart_8250_port *p) { }
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+
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+static inline bool serial8250_tx_dma_running(struct uart_8250_port *p)
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+{
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+	return false;
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+}
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 #endif
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 static inline int ns16550a_goto_highspeed(struct uart_8250_port *up)