On Wed, 9 Aug 2023 17:41:40 +0530
Vijaya Krishna Nivarthi <quic_vnivarth@xxxxxxxxxxx> wrote:
> TX is handled by primary sequencer. After cancelling primary command, poll
> primary sequencer's irq status instead of that of secondary.
Hi,
it is not clear to me if this is a bug fix or an improvement?
> While at it, also remove a couple of redundant lines that read from IRQ_EN
> register and write back same.
This should go into a separate patch.
Hugo Villeneuve.
> Fixes: 2aaa43c70778 ("tty: serial: qcom-geni-serial: add support for serial engine DMA")
> Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@xxxxxxxxxxx>
> ---
> drivers/tty/serial/qcom_geni_serial.c | 7 ++-----
> 1 file changed, 2 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
> index 3ca5db2..b8aa4c1 100644
> --- a/drivers/tty/serial/qcom_geni_serial.c
> +++ b/drivers/tty/serial/qcom_geni_serial.c
> @@ -591,7 +591,6 @@ static void qcom_geni_serial_stop_tx_dma(struct uart_port *uport)
> {
> struct qcom_geni_serial_port *port = to_dev_port(uport);
> bool done;
> - u32 m_irq_en;
>
> if (!qcom_geni_serial_main_active(uport))
> return;
> @@ -603,12 +602,10 @@ static void qcom_geni_serial_stop_tx_dma(struct uart_port *uport)
> port->tx_remaining = 0;
> }
>
> - m_irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN);
> - writel(m_irq_en, uport->membase + SE_GENI_M_IRQ_EN);
> geni_se_cancel_m_cmd(&port->se);
>
> - done = qcom_geni_serial_poll_bit(uport, SE_GENI_S_IRQ_STATUS,
> - S_CMD_CANCEL_EN, true);
> + done = qcom_geni_serial_poll_bit(uport, SE_GENI_M_IRQ_STATUS,
> + M_CMD_CANCEL_EN, true);
> if (!done) {
> geni_se_abort_m_cmd(&port->se);
> done = qcom_geni_serial_poll_bit(uport, SE_GENI_M_IRQ_STATUS,
> --
> 2.7.4
>
