Am Do., 17. Jan. 2019 um 13:35 Uhr schrieb Andreas Fenkart <afenkart@xxxxxxxxx>:
>
> Hi Jerome
> > Here your eMMC timedout during init, so even before an attempt is made to tune
> > which is odd. Could you try to enable signal resampling only when going forhigh speed modes ?
>
card is found with this patch:
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -432,12 +432,17 @@ static int meson_mmc_clk_set(struct meson_host
*host, struct mmc_ios *ios)
struct mmc_host *mmc = host->mmc;
unsigned long rate = ios->clock;
int ret;
- u32 cfg;
+ u32 cfg = 0, adj = 0;
/* DDR modes require higher module clock */
if (meson_mmc_timing_is_ddr(ios))
rate <<= 1;
/* Same request - bail-out */
if (host->req_rate == rate)
return 0;
@@ -475,6 +480,13 @@ static int meson_mmc_clk_set(struct meson_host
*host, struct mmc_ios *ios)
if (ios->clock != mmc->actual_clock)
dev_dbg(host->dev, "requested rate was %u\n", ios->clock);
+ if (rate >= 200000000) {
+ printk("enable signal resampling");
+ /* enable signal resampling w/o delay */
+ adj = ADJUST_ADJ_EN;
+ writel(adj, host->regs + host->data->adjust);
+ }
+
/* (re)start clock */
meson_mmc_clk_ungate(host);
/Andi
