On Sun, Apr 21, 2019 at 5:35 AM Clément Péron peron.clem@gmail.com wrote:
Hi,
I'm looking to port the sun4i-i2s drivers for Allwinner H6, but regarding the quirks I found strange that H3 and A64 was so different.
I have analyzed the datasheet and using human reading comparison, I have found only 3 minor differences in the registers.
H3 reference i have used : H3 Datasheet(Revision 1.0) For A64 : A64 User Manual(Revision 1.1)
H3 is identical to A64 except H3 has new : LRCKR_OUT bit(16) in PCM_CONTROL_REG SDI_sync_sel Bit(31) in PCM_FMT0_REG LRCKR_PERIOD Mask(29:20) in PCM_FMT0_REG
Regarding the quirks struct in the drivers and the commit log sha1: 66ecce3325383c8304063e7d5a30f4374ef5a33e ASoC: sun4i-i2s: Add compatibility with A64 codec I2S
Note that it mentions *codec* I2S. A64 has 4 I2S, 3 are pretty much like H3, but the other (one that is used with built-in audio codec) is totally different.
See 3.20.4 in A64 user manual, regs 0x00-0x3c are codec I2S.
The I2S block used for the audio codec in the A64 differs from other 3 I2S modules in A64 and isn't compatible with H3. But it is very similar to what is found in A10(sun4i). However, its TX FIFO is located at a different address.It said that A64 is really different which I disagree, for me the H3 use the same IP as A64 with a little improvement. Which seems logical because "The A64 is basically an Allwinner H3 with the Cortex-A7 cores replaced with Cortex-A53 cores" (source linux-sunxi.org)
I'm okay to send a patch to fix that but I don't have an H3 nor A64 to test the modification.
Thanks, Clement