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Commit 90fdfeb4 authored by Vipin Deep Kaur's avatar Vipin Deep Kaur
Browse files

Revert "serial: msm_geni_serial: Use only watermark interrupt instead stale" 



This reverts commit 2575af77.

Change-Id: Ic9773c343217654a491b1fb0406b75027eb6dddf
Signed-off-by: default avatarVipin Deep Kaur <vkaur@codeaurora.org>
parent 692654ff

drivers/tty/serial/msm_geni_serial.c

+8 −9
Original line number Diff line number Diff line
@@ -123,8 +123,7 @@ 
} while (0)



#define DMA_RX_BUF_SIZE		(2048)

#define UART_CONSOLE_RX_WM	(0)

/* Not using stale interrupt, hence change watermark level */

#define UART_CONSOLE_RX_WM	(2)



struct msm_geni_serial_ver_info {

	int hw_major_ver;
@@ -1109,8 +1108,7 @@ static void start_rx_sequencer(struct uart_port *uport) 
		geni_m_irq_en = geni_read_reg_nolog(uport->membase,

							SE_GENI_M_IRQ_EN);



		/* Not using stale Interrupt */

		geni_s_irq_en |= S_RX_FIFO_WATERMARK_EN | (~S_RX_FIFO_LAST_EN);

		geni_s_irq_en |= S_RX_FIFO_WATERMARK_EN | S_RX_FIFO_LAST_EN;

		geni_m_irq_en |= M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN;



		geni_write_reg_nolog(geni_s_irq_en, uport->membase,
@@ -1331,9 +1329,9 @@ static int msm_geni_serial_handle_rx(struct uart_port *uport, bool drop_rx) 
	rx_fifo_status = geni_read_reg_nolog(uport->membase,

				SE_GENI_RX_FIFO_STATUS);

	rx_fifo_wc = rx_fifo_status & RX_FIFO_WC_MSK;

	/* Not using the stale interrupt, make stale event always true */

	rx_last_byte_valid = 1;

	rx_last = 1;

	rx_last_byte_valid = ((rx_fifo_status & RX_LAST_BYTE_VALID_MSK) >>

						RX_LAST_BYTE_VALID_SHFT);

	rx_last = rx_fifo_status & RX_LAST;

	if (rx_fifo_wc)

		ret = port->handle_rx(uport, rx_fifo_wc, rx_last_byte_valid,

							rx_last, drop_rx);
@@ -1601,7 +1599,8 @@ static irqreturn_t msm_geni_serial_isr(int isr, void *dev) 
				__func__, s_irq_status, uport->icount.brk);

		}



		if ((s_irq_status & S_RX_FIFO_WATERMARK_EN))

		if ((s_irq_status & S_RX_FIFO_WATERMARK_EN) ||

			(s_irq_status & S_RX_FIFO_LAST_EN))

			msm_geni_serial_handle_rx(uport, drop_rx);

	} else {

		if (dma_tx_status) {
@@ -1818,7 +1817,7 @@ static int msm_geni_serial_port_setup(struct uart_port *uport) 
						SE_GENI_TX_PACKING_CFG0);

		geni_write_reg_nolog(cfg1, uport->membase,

						SE_GENI_TX_PACKING_CFG1);

		se_get_packing_config(8, 1, false, &cfg0, &cfg1);

		se_get_packing_config(8, 4, false, &cfg0, &cfg1);

		geni_write_reg_nolog(cfg0, uport->membase,

						SE_GENI_RX_PACKING_CFG0);

		geni_write_reg_nolog(cfg1, uport->membase,