[PATCH 2/9] sunxi: H616: dram: LPDDR3: adjust settings
Mikhail Kalashnikov
iuncuim at gmail.com
Sat Aug 3 15:17:26 CEST 2024
On 02.08.2024 01:55, Chris Morgan wrote:
> From: Jernej Skrabec <jernej.skrabec at gmail.com>
>
> Adjust H616 LPDDR3 DRAM settings to be in line with vendor driver.
>
> Signed-off-by: Jernej Skrabec <jernej.skrabec at gmail.com>
> Tested-by: Chris Morgan <macromorgan at hotmail.com>
> ---
> arch/arm/mach-sunxi/dram_sun50i_h616.c | 2 +-
> arch/arm/mach-sunxi/dram_timings/h616_lpddr3.c | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/mach-sunxi/dram_sun50i_h616.c b/arch/arm/mach-sunxi/dram_sun50i_h616.c
> index 37c139e0ee..a20264d8b4 100644
> --- a/arch/arm/mach-sunxi/dram_sun50i_h616.c
> +++ b/arch/arm/mach-sunxi/dram_sun50i_h616.c
> @@ -945,7 +945,7 @@ static bool mctl_phy_init(const struct dram_para *para,
> val = para->tpr6 & 0xff;
> break;
> case SUNXI_DRAM_TYPE_LPDDR3:
> - val = para->tpr6 >> 8 & 0xff;
> + val = para->tpr6 >> 16 & 0xff;
This is the correct change to match the factory tpr6 parameters.
I think, we also need to change the default value in
arch/arm/mach-sunxi/Kconfig:
from: config DRAM_SUN50I_H616_TPR6
hex "H616 DRAM TPR6 parameter"
default 0x3300c080
to
default 0x33c00080
> break;
> case SUNXI_DRAM_TYPE_LPDDR4:
> val = para->tpr6 >> 24 & 0xff;
> diff --git a/arch/arm/mach-sunxi/dram_timings/h616_lpddr3.c b/arch/arm/mach-sunxi/dram_timings/h616_lpddr3.c
> index ce2ffa7a02..82b86084a6 100644
> --- a/arch/arm/mach-sunxi/dram_timings/h616_lpddr3.c
> +++ b/arch/arm/mach-sunxi/dram_timings/h616_lpddr3.c
> @@ -24,8 +24,8 @@ void mctl_set_timing_params(const struct dram_para *para)
> u8 trrd = max(ns_to_t(6), 4);
> u8 trcd = ns_to_t(24);
> u8 trc = ns_to_t(70);
> - u8 txp = max(ns_to_t(8), 3);
> u8 trtp = max(ns_to_t(8), 2);
> + u8 txp = trtp;
I think Jernejchanged this value using RE. I checked the 047fb104
register (dramtmg[1])
on my t98-h2b-lp3 tvbox, it has not changed and is the same as the
factory value.
=> md.l 0x47fb100
047fb100: 10141811 0004041c 04070d0d 0050500c .............PP.
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