Re: [PATCH 0/8] sunxi: Update H616 DRAM driver

["Jernej Škrabec" <jernej.skrabec@gmail.com>]

Hi Andre,

Dne ponedeljek, 12. december 2022 ob 02:04:51 CET je Andre Przywara 
napisal(a):
> On Sun, 11 Dec 2022 17:32:05 +0100
> Jernej Skrabec <jernej.skrabec@gmail.com> wrote:
> 
> Hi Jernej,
> 
> many thanks for putting this together!
> I will have a more elaborate look at each patch later.
> 
> > Current H616 DRAM driver is completely customized to Orange Pi Zero2
> > board, which is currently the only H616 board supported by U-Boot.
> 
> Not anymore, I merged the X96 Mate support lately, after the DT got
> merged into the Linux tree.

Right. First part of sentence is still true, although I later remembered that 
some values are based on T95 values, those that are not used by Orange Pi 
Zero2.

> 
> Those are the values for the box I came up with:
> CONFIG_DRAM_SUN50I_H616_DX_ODT=0x03030303
> CONFIG_DRAM_SUN50I_H616_DX_DRI=0x0e0e0e0e
> CONFIG_DRAM_SUN50I_H616_CA_DRI=0x1c12
> CONFIG_DRAM_SUN50I_H616_TPR0=0xc0000c05
> CONFIG_DRAM_SUN50I_H616_TPR10=0x2f0007
> CONFIG_DRAM_SUN50I_H616_TPR11=0xffffdddd
> CONFIG_DRAM_SUN50I_H616_TPR12=0xfedf7557
> 
> based on this boot0 found in some firmware update image:
> 00045400  be 02 00 ea 65 47 4f 4e  2e 42 54 30 cc ba f3 80 
> |....eGON.BT0....| 00045410  00 c0 00 00 30 00 00 00  00 00 00 00 00 00 02
> 00  |....0...........| 00045420  00 00 02 00 00 00 00 00  00 00 00 00 34 2e
> 30 00  |............4.0.| 00045430  00 00 00 00 03 00 00 00  88 02 00 00 03
> 00 00 00  |................| 00045440  03 03 03 03 0e 0e 0e 0e  12 1c 00 00
> 01 00 00 00  |................| 00045450  fb 30 00 00 00 00 00 00  40 08 00
> 00 04 00 00 00  |.0......@.......| 00045460  08 00 00 00 00 00 00 00  00 00
> 00 00 00 00 00 00  |................| 00045470  00 00 00 00 00 00 00 00  00
> 00 00 00 00 00 00 00  |................| 00045480  00 00 00 00 00 00 00 00 
> 00 00 00 00 00 00 00 00  |................| 00045490  05 0c 00 c0 00 00 00
> 00  00 00 00 00 00 00 00 00  |................| 000454a0  80 80 80 33 07 00
> 2f 00  dd dd ff ff 57 75 df fe  |...3../.....Wu..| 000454b0  40 00 00 00 00
> 00 00 00  00 00 00 00 08 00 02 01  |@...............|
> 
> I would be grateful if you could verify this.

Looks correct. I'll use them in my v2 patches.

> 
> I built it, and it reported the 4GB correctly, also managed to boot into
> Linux just fine. No extensive testing, nor didn't I compare register
> dumps or disassembly (yet).
> 
> Cheers,
> Andre
> 
> P.S. Any plans on upstreaming support for your T95 <whatever> H616 TV
> box? That would probably help the case here.

Not really, X96 Mate is basically the same as T95, except DRAM configuration. 
As I said, I verified that these patches provide same register values as 
before. This includes those which were modeled after T95 DRAM values.

Best regards,
Jernej

> 
> > Needless to say, this is not ideal for adding new boards. With changes
> > in this series, all DDR3 boards are supported and all that is needed is
> > just vendor DRAM values extracted from Android image. New DRAM types
> > should also be easier to support, since a lot of constants used before
> > are not really DRAM type dependent.
> > 
> > Changes were verified by decompiling driver and generated values were
> > compared to previous, hard coded ones. This was done without dram_para
> > structures, so compiler was able to heavily optimize code and produce
> > constants.
> > 
> > Please take a look.
> > 
> > Best regards,
> > Jernej
> > 
> > Jernej Skrabec (8):
> >   sunxi: Fix write to H616 DRAM CR register
> >   sunxi: cosmetic: Fix H616 DRAM driver code style
> >   sunxi: parameterize H616 DRAM ODT values
> >   sunxi: Convert H616 DRAM options to single setting
> >   sunxi: Always configure ODT on H616 DRAM
> >   sunxi: Make bit delay function in H616 DRAM code void
> >   sunxi: Parameterize bit delay code in H616 DRAM driver
> >   sunxi: Parameterize H616 DRAM code some more
> >  
> >  .../include/asm/arch-sunxi/dram_sun50i_h616.h |  18 +
> >  arch/arm/mach-sunxi/Kconfig                   |  67 +--
> >  arch/arm/mach-sunxi/dram_sun50i_h616.c        | 445 +++++++++++-------
> >  configs/orangepi_zero2_defconfig              |   8 +-
> >  4 files changed, 348 insertions(+), 190 deletions(-)