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title: "SDHI; SCC may stall if SDnH is not provided"
team: IO
key: d593a7de-95e8-11ea-8695-9f6a675410b7
status: Done
assignee: Wolfram
relationships:
bsp39x:
- addfe9203290e3c274bca15e64e3f11638649e66 # mmc: renesas_sdhi: Fix hang up in HS400 timing mode selection
upstream:
- torvalds: 24fdcb377892b44dfe9755a62e4b92e9c6a0b359 # mmc: core: when downgrading HS400, callback into drivers earlier
- torvalds: 97a7d87e96b02fc5b3944d7735e0f6b8446d07da # mmc: core: add a 'doing_init_tune' flag and a 'mmc_doing_tune' helper
- torvalds: 0f93db6542fa94262b611ff942b9b3ad7ecbea10 # mmc: renesas_sdhi: keep SCC clock active when tuning
comments:
- "hang up is surprisingly hard to reproduce but we keep trying"
- "updated manual calibration patchset makes the issue appear again"
- "v1: https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=298209&state=*"
- "not all error paths covered; we need a new flag in the MMC core. Wolfram will work on it"
- "delayed because of generic Gen3 board boot problems"
- "patches for MMC core updates exists. However, currently not possible to trigger the issue again"
- "issue could be triggered again once"
- "patch to inject the fault for stalled SCC was created"
- "MMC core updates could be tested and worked"
- "v2: https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=341697&state=*"
- "v2 tested and reviewed by Shimoda-san"
- "v2 merged"
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