Thx for your answer. I checked in the folder linux/firmware/imx/sdma/ and there is these files:
1928 Sep 19 11:13 sdma-imx25-to1.bin.ihex 10340 Sep 19 11:13 sdma-imx31-to1.bin.ihex 10368 Sep 19 11:13 sdma-imx31-to2.bin.ihex 5544 Sep 19 11:13 sdma-imx35-to1.bin.ihex 4824 Sep 19 11:13 sdma-imx35-to2.bin.ihex 1532 Sep 19 11:13 sdma-imx50-to1.bin.ihex 2248 Sep 19 11:13 sdma-imx51-to3.bin.ihex 3880 Sep 19 11:13 sdma-imx53-to1.bin.ihex 1838 Sep 19 11:17 sdma-imx6q-to1.bin 2868 Sep 19 11:17 sdma-imx6q-to1.bin.gen.o 1482 Sep 19 11:17 .sdma-imx6q-to1.bin.gen.o.cmd 510 Sep 19 11:17 sdma-imx6q-to1.bin.gen.S 5068 Sep 19 11:13 sdma-imx6q-to1.bin.ihex
As you can see the sdma-imx6q-to1.bin.gen.o is correctly built. How can i check that the firmware is correctly loaded? What is the purpose of this firmware seen that wm8962 is working fine in SND_SOC_DAIFMT_DSP_B. My point is using AUD_MUX4 with I2S protocol. Best regards.
Stephane
On 09/25/2013 03:12 PM, Fabio Estevam wrote:
On Wed, Sep 25, 2013 at 10:08 AM, stéphane cerveau scerveau@gmail.com wrote:
Dear all,
I'm currently working on supporting WM8740 device software configured with imx6q system. For now my driver seems to be configured correctly. The playback is launched but i get: ALSA sound/core/pcm_lib.c:1822 playback write error (DMA or IRQ trouble? write error: Input/output error
This may indicate that you are missing the SDMA firmware for the mx6. (linux/firmware/sdma/sdma-imx6q.bin)
Starting on 3.12-rc1 you don't need the SDMA firmware for audio playback anymore.
So I would suggest one of the above methods.
Regards,
Fabio Estevam