Some R-Car Gen3 SoCs need corrections after they tuned to HS400. This series implements that. Please have a look at the patch descriptions for details. The origins were patches in the BSP from Takeshi Saito. However, this series is heavily refactored: * DT configuration was dropped, there is no user for it * the fixup offset is currently hardcoded because all affected SoCs use the same offset. We can add it later to the struct quirks if needed * disabling HS400 for some SoCs was already upstreamed * the callback in the TMIO was made more generic to allow other use cases in the future * less impact on the TMIO driver by stricter seperation of the SDHI parts * clearing the runtime flag in the error case was moved from select_tuning to hw_reset to catch all error cases * cosmetic fixups There is a branch for testing here: git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git renesas/topic/sdhi-manual-calib The patches were developed against mmc/next. However, the above branch is based on v5.2-rc6 with some cherry-picked patches from mmc/next, so Geert can consume it easier for his renesas-drivers branch. There are two more patches in that branch worth mentioning. A clk driver WIP patch which I needed to get HS400 on my M3-N working at all. We are discussing this patch internally right now and its upstreaming is a seperate issue. Also, there is a debug patch on top. I can't test that the manual fixup values improve HS400 because the actual issue only shows with temperatures I can't (and don't want to) provide here in my office. So, the debug patches add some trace_printk to demonstrate the functions are called and the outputs match the intended state machine. Here are examples (with comments) from my M3-N. If you review this, please don't trust anything I write here. An unaffected SDHI instance (no eMMC): Adjustment and runtime flag get disabled during the reset in the beginning of the initialization. The same reset routine will be called when tuning fails. kworker/0:2-965 [000] .... 1.413767: renesas_sdhi_reset_hs400_mode: ee100000.sd: adjustment disabled kworker/0:2-965 [000] .... 1.413768: renesas_sdhi_hw_reset: ee100000.sd: reset! flag disabled An SDHI instance with a HS400 capable eMMC connected: When preparing HS400 tuning, (potential) old HS400 tuning gets reset and the manual adjustment gets disabled, the runtime flag (signalling new manual adjustment will be needed) is set: kworker/0:1H-1009 [000] .... 1.864628: renesas_sdhi_reset_hs400_mode: ee140000.sd: adjustment disabled kworker/0:1H-1009 [000] .... 1.864629: renesas_sdhi_prepare_hs400_tuning: ee140000.sd: flag enabled Lots of tuning CMDs: kworker/0:2-965 [000] .... 1.864673: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.864706: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.864735: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.864765: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.864797: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.864825: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.864855: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.864882: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.864909: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.864935: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.864966: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.864998: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.865025: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.865052: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.865079: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.865106: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.865130: renesas_sdhi_fixup_request: ee140000.sd: opcode 6, flag 1 kworker/0:2-965 [000] .... 1.865603: renesas_sdhi_fixup_request: ee140000.sd: opcode 13, flag 1 First CMD13 after tuning discovered, enable adjustment, clear runtime flag: kworker/0:2-965 [000] .... 1.865609: renesas_sdhi_fixup_request: ee140000.sd: adjustment enabled, flag disabled kworker/0:2-965 [000] .... 1.865635: renesas_sdhi_fixup_request: ee140000.sd: opcode 6, flag 0 kworker/0:2-965 [000] .... 1.865654: renesas_sdhi_fixup_request: ee140000.sd: opcode 13, flag 0 kworker/0:2-965 [000] .... 1.865676: renesas_sdhi_fixup_request: ee140000.sd: opcode 6, flag 0 kworker/0:2-965 [000] .... 1.866143: renesas_sdhi_fixup_request: ee140000.sd: opcode 13, flag 0 kworker/0:2-965 [000] .... 1.866601: renesas_sdhi_fixup_request: ee140000.sd: opcode 18, flag 0 Reading multiple blocks (CMD18) above failed kworker/0:2-965 [000] .... 1.866867: renesas_sdhi_fixup_request: ee140000.sd: opcode 6, flag 0 kworker/0:2-965 [000] .... 1.867113: renesas_sdhi_fixup_request: ee140000.sd: opcode 13, flag 0 kworker/0:2-965 [000] .... 1.867137: renesas_sdhi_fixup_request: ee140000.sd: opcode 6, flag 0 kworker/0:2-965 [000] .... 1.867384: renesas_sdhi_fixup_request: ee140000.sd: opcode 13, flag 0 kworker/0:2-965 [000] .... 1.867409: renesas_sdhi_fixup_request: ee140000.sd: opcode 6, flag 0 kworker/0:2-965 [000] .... 1.867651: renesas_sdhi_fixup_request: ee140000.sd: opcode 13, flag 0 Seems like another retune is need, start cycle again: kworker/0:1H-1009 [000] .... 1.867880: renesas_sdhi_reset_hs400_mode: ee140000.sd: adjustment disabled kworker/0:1H-1009 [000] .... 1.867882: renesas_sdhi_prepare_hs400_tuning: ee140000.sd: flag enabled kworker/0:2-965 [000] .... 1.867926: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.867958: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.867986: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.868019: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.868048: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.868076: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.868103: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.868129: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.868156: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.868181: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.868208: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.868237: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.868267: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.868294: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.868321: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.868347: renesas_sdhi_fixup_request: ee140000.sd: opcode 21, flag 1 kworker/0:2-965 [000] .... 1.868370: renesas_sdhi_fixup_request: ee140000.sd: opcode 6, flag 1 kworker/0:2-965 [000] .... 1.868837: renesas_sdhi_fixup_request: ee140000.sd: opcode 13, flag 1 kworker/0:2-965 [000] .... 1.868842: renesas_sdhi_fixup_request: ee140000.sd: adjustment enabled, flag disabled kworker/0:2-965 [000] .... 1.868869: renesas_sdhi_fixup_request: ee140000.sd: opcode 6, flag 0 kworker/0:2-965 [000] .... 1.868888: renesas_sdhi_fixup_request: ee140000.sd: opcode 13, flag 0 kworker/0:2-965 [000] .... 1.868913: renesas_sdhi_fixup_request: ee140000.sd: opcode 6, flag 0 kworker/0:2-965 [000] .... 1.869381: renesas_sdhi_fixup_request: ee140000.sd: opcode 13, flag 0 Finally, we can read lots of blocks without problems. The manual adjustment is still enabled as desired: kworker/0:2-965 [000] .... 1.870027: renesas_sdhi_fixup_request: ee140000.sd: opcode 18, flag 0 kworker/0:2-965 [000] .... 1.871300: renesas_sdhi_fixup_request: ee140000.sd: opcode 18, flag 0 kworker/0:2-965 [000] .... 1.871454: renesas_sdhi_fixup_request: ee140000.sd: opcode 18, flag 0 kworker/0:2-965 [000] .... 1.871579: renesas_sdhi_fixup_request: ee140000.sd: opcode 18, flag 0 kworker/0:2-965 [000] .... 1.871712: renesas_sdhi_fixup_request: ee140000.sd: opcode 18, flag 0 ... Okay, I know this is a lot of text, but it is a subtle issue, so I wanted to provide the details which enable other people to actually review what I have done. Shimoda-san, if the BSP team could have a look and share their opinion or could test, I'd be most grateful. Thanks and happy hacking, Wolfram Wolfram Sang (4): mmc: renesas_sdhi: keep sorting mmc: tmio: add generic hook to fixup after a completed request mmc: renesas_sdhi: make quirks info accessible outside probe() mmc: renesas_sdhi: support manual calibration drivers/mmc/host/renesas_sdhi.h | 9 ++ drivers/mmc/host/renesas_sdhi_core.c | 129 +++++++++++++++++++++++++-- drivers/mmc/host/tmio_mmc.h | 1 + drivers/mmc/host/tmio_mmc_core.c | 3 + 4 files changed, 135 insertions(+), 7 deletions(-) -- 2.20.1
