TechPanelGM/kernel_xiaomi_sm8250
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serial: msm_serial_hs: set the DMA mask and the coherent DMA mask

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Basically, the fact that the coherent DMA mask value
wasn't set caused the driver to fall back to SWIOTLB.
For correct operation, lets call the
dma_set_mask_and_coherent() to properly set
the mask for both streaming and coherent, in
order to inform the kernel about the devices
DMA addressing capabilities.

Change-Id: I522fde8f78c01be55e91715769b4f16a28bca724
Signed-off-by: Chetan C R <cchinnad@codeaurora.org>
This commit is contained in:
Chetan C R
2020-07-20 15:03:41 +05:30
committed by Gerrit - the friendly Code Review server
parent 51d808aa7d
commit af9bf852d0
1 changed files with 7 additions and 2 deletions
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9
drivers/tty/serial/msm_serial_hs.c
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@@ -2688,8 +2688,7 @@ static int msm_hs_startup(struct uart_port *uport)
tx->dma_in_flight = false;
MSM_HS_DBG("%s():desc usage flag 0x%lx\n", __func__, rx->queued_flag);
timer_setup(&(tx->tx_timeout_timer),
tx_timeout_handler,
(unsigned long) msm_uport);
tx_timeout_handler, 0);
/* Enable reading the current CTS, no harm even if CTS is ignored */
msm_uport->imr_reg |= UARTDM_ISR_CURRENT_CTS_BMSK;
@@ -3316,6 +3315,12 @@ static int msm_hs_probe(struct platform_device *pdev)
unsigned long data;
char name[30];
ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
if (ret) {
dev_err(&pdev->dev, "could not set DMA mask\n");
return ret;
}
if (pdev->dev.of_node) {
dev_dbg(&pdev->dev, "device tree enabled\n");
pdata = msm_hs_dt_to_pdata(pdev);