Re: [PATCH v1 0/3] mmc: dw_mmc-rockchip: Add stability quirk for NanoPi R76S
From: Marco Schirrmeister <hidden>
Date: 2026-01-12 19:05:04
Also in:
linux-devicetree, linux-mmc, linux-rockchip
On Mon, Jan 12, 2026 at 2:32 AM Shawn Lin [off-list ref] wrote:
quoted
Evidence of the failure in dmesg: [Fri Jan 2 01:28:02 2026] mmc_host mmc1: Bus speed (slot 0) = 400000Hz [Fri Jan 2 01:28:03 2026] mmc_host mmc1: Bus speed (slot 0) = 198000000Hz [Fri Jan 2 01:28:03 2026] dwmmc_rockchip 2a310000.mmc: Successfully tuned phase to 233 [Fri Jan 2 01:28:04 2026] mmc_host mmc1: Bus speed (slot 0) = 400000HzDoes this problem happen with all microSDs or just *a* microSD per your description? Have you ever tried to disable SDR104 support?
I tested with multiple SanDisk Extreme and Ultra. Yes, I have tried to disable SDR104. Also others for testing. Nothing made a difference.