Hi Miquel, hi Maxime,
could you probably run a test on a newer Allwinner SOC - like e.g. SUNI8, SUNI9, SUNI50 or newer, since I can test it on a SUNI7 (A20) board only?
The only aspect that makes me wonder is, that it did work on your hardware before at all.
Maybe this is, since that NFC_CTL_RAM_METHOD flag does not matter on newer SOC, if the DMA channel is not enabled for the NFC.
Markus Am Do., 30. Juni 2022 um 09:31 Uhr schrieb Maxime Ripard maxime@cerno.tech:
On Thu, Jun 30, 2022 at 09:13:22AM +0200, Miquel Raynal wrote:
Hi Markus,
- Maxime, for the record :)
mhoffrogge@gmail.com wrote on Thu, 30 Jun 2022 01:26:39 +0200:
The sunxi nand SPL loader was broken at least for SUN4I, SUN5I and SUN7I SOCs since the implementation change from DMA to PIO usage - commit 6ddbb1e.
Root cause for this issue is the NFC control flag NFC_CTL_RAM_METHOD being set by method nand_apply_config.
This flag controls the bus being used for the NFCs internal RAM access. It must be set for the DMA use case only. See A33_Nand_Flash_Controller_Specification.pdf page 12.
This fix is tested by myself on a Cubietruck A20 board. Others should test it on new generation SOCs as well.
Good to know that someone tackled this, Maxime already reported some time ago that it was broken for a number of boards but I never took the time to investigate, apologies.
Oh, that's awesome, thanks for tackling this :)
Maxime