Commit Graph

3 Commits (ad65d9d7b264d6d17293c59469e770905d2f785a)

Author SHA1 Message Date
Koen Vandeputte 27df621505 imx6: bump SDMA firmware to 3.5
- add uart rom script address in header of sdma firmware to support
  the uart driver of latest kernel working well while old firmware
  assume ram script used for uart driver as NXP internal legacy
  kernel.
- add multi-fifo SAI/PDM scripts.

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
2019-07-31 16:51:46 +02:00
Koen Vandeputte fa8d5ad21b imx6: bump sdma firmware to 3.4
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
2019-04-09 11:29:20 +02:00
Koen Vandeputte 74738c4b80 imx6: fix DMA transaction errors
Following errors were seen in the past on imx6 when using serial:

[ 22.617622] imx-uart 2020000.serial: DMA transaction error.
[ 22.623228] imx-uart 2020000.serial: DMA transaction error.
[ 22.628826] imx-uart 2020000.serial: DMA transaction error.
[ 22.648951] imx-uart 2020000.serial: DMA transaction error.
[ 22.654558] imx-uart 2020000.serial: DMA transaction error.
[ 22.660156] imx-uart 2020000.serial: DMA transaction error.

Which is the reason why DMA for the serial ports
got disabled in commits:

efb362cd93 ("imx6: disable dma on uart")
3b4241071d ("imx6: disable UART dma")

As indicated on mailinglist discussion, the cause seems to be
the usage of very old SDMA firmware which is present in the soc:

[    0.624302] imx-sdma 20ec000.sdma: Direct firmware load for imx/sdma/sdma-imx6q.bin failed with error -2
[    0.624318] imx-sdma 20ec000.sdma: Falling back to user helper
[   64.531607] imx-sdma 20ec000.sdma: external firmware not found, using ROM firmware

This patch adds the new firmware binary. (2196 bytes)

It is required to embed the binary into the kernel image, as it
gets loaded very early in the boot process where the rootfs is not
available yet:

[    0.622966] imx-sdma 20ec000.sdma: loaded firmware 3.3

Extended testing shows that the DMA errors are not seen anymore
when using this newer firmware version.

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
2018-11-06 11:49:27 +01:00