| Message ID | 20220627065113.139520-1-chanho61.park@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | tty: serial: samsung_tty: set dma burst_size to 1 | expand |
On 27/06/2022 08:51, Chanho Park wrote: > The src_maxburst and dst_maxburst have been changed to 1 but the settings > of the UCON register aren't changed yet. They should be changed as well > according to the dmaengine slave config. > > Fixes: aa2f80e752c7 ("serial: samsung: fix maxburst parameter for DMA transactions") > Cc: Marek Szyprowski <m.szyprowski@samsung.com> > Signed-off-by: Chanho Park <chanho61.park@samsung.com> > --- > drivers/tty/serial/samsung_tty.c | 5 ++--- > 1 file changed, 2 insertions(+), 3 deletions(-) Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Best regards, Krzysztof
diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c index 679789bf856d..2b9c56c77676 100644 --- a/drivers/tty/serial/samsung_tty.c +++ b/drivers/tty/serial/samsung_tty.c @@ -383,8 +383,7 @@ static void enable_tx_dma(struct s3c24xx_uart_port *ourport) /* Enable tx dma mode */ ucon = rd_regl(port, S3C2410_UCON); ucon &= ~(S3C64XX_UCON_TXBURST_MASK | S3C64XX_UCON_TXMODE_MASK); - ucon |= (dma_get_cache_alignment() >= 16) ? - S3C64XX_UCON_TXBURST_16 : S3C64XX_UCON_TXBURST_1; + ucon |= S3C64XX_UCON_TXBURST_1; ucon |= S3C64XX_UCON_TXMODE_DMA; wr_regl(port, S3C2410_UCON, ucon); @@ -680,7 +679,7 @@ static void enable_rx_dma(struct s3c24xx_uart_port *ourport) S3C64XX_UCON_DMASUS_EN | S3C64XX_UCON_TIMEOUT_EN | S3C64XX_UCON_RXMODE_MASK); - ucon |= S3C64XX_UCON_RXBURST_16 | + ucon |= S3C64XX_UCON_RXBURST_1 | 0xf << S3C64XX_UCON_TIMEOUT_SHIFT | S3C64XX_UCON_EMPTYINT_EN | S3C64XX_UCON_TIMEOUT_EN |
The src_maxburst and dst_maxburst have been changed to 1 but the settings of the UCON register aren't changed yet. They should be changed as well according to the dmaengine slave config. Fixes: aa2f80e752c7 ("serial: samsung: fix maxburst parameter for DMA transactions") Cc: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Chanho Park <chanho61.park@samsung.com> --- drivers/tty/serial/samsung_tty.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)