On Fri, 2018-08-10 at 21:08 +0300, Aapo Vienamo wrote: > Hi all, > > This series implements support for faster signaling modes on Tegra > SDHCI controllers. This series consist of several parts: changes > requried for 1.8 V signaling and pad control, pad calibration, and > tuning. Following earlies patch sets have been merged into this > larger set: "Tegra PMC pinctrl pad configuration", "Tegra SDHCI > enable > 1.8 V signaling on Tegar210 and Tegra186", "Tegra SDHCI update the > padautocal procedure". Also the patches for enabling SDHCI tuning > are added. I tried your tkln/hs200 branch on Colibri T20, Apalis/Colibri T30 and Apalis TK1. It at least does not seem to make things any worse but HS200 on TK1 still seems to behave strangely. During boot I do get the following message (mmc0 being the SDHCI instance of one of them SD card slots): [ 3.238360] mmc0: Internal clock never stabilised. [ 3.243183] mmc0: sdhci: ============ SDHCI REGISTER DUMP =========== [ 3.249649] mmc0: sdhci: Sys addr: 0x00000000 | Version: 0x00000303 [ 3.256138] mmc0: sdhci: Blk size: 0x00000000 | Blk cnt: 0x00000000 [ 3.262657] mmc0: sdhci: Argument: 0x00000000 | Trn mode: 0x00000000 [ 3.269119] mmc0: sdhci: Present: 0x01fb00f0 | Host ctl: 0x00000000 [ 3.275580] mmc0: sdhci: Power: 0x0000000f | Blk gap: 0x00000000 [ 3.282041] mmc0: sdhci: Wake-up: 0x00000000 | Clock: 0x00000401 [ 3.288485] mmc0: sdhci: Timeout: 0x00000000 | Int stat: 0x00000000 [ 3.295037] mmc0: sdhci: Int enab: 0x00ff0003 | Sig enab: 0x00fc0003 [ 3.301559] mmc0: sdhci: AC12 err: 0x00000000 | Slot int: 0x00000000 [ 3.308022] mmc0: sdhci: Caps: 0x376fd080 | Caps_1: 0x10000f70 [ 3.314527] mmc0: sdhci: Cmd: 0x00000000 | Max curr: 0x00000000 [ 3.321159] mmc0: sdhci: Resp[0]: 0x00000000 | Resp[1]: 0x00000000 [ 3.327642] mmc0: sdhci: Resp[2]: 0x00000000 | Resp[3]: 0x00000000 [ 3.334144] mmc0: sdhci: Host ctl2: 0x00000000 [ 3.338613] mmc0: sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x00000000 [ 3.345110] mmc0: sdhci: ============================================ And it subsequently stalls waiting for interrupt for more than 8 seconds before continuing to mount the rootfs as follows (mmc2 being the SDHCI instance of the eMMC): [ 4.874017] tegra-hdmi 54280000.hdmi: cannot set audio to 48000 Hz at 297000000 Hz pixel clock [ 13.930136] mmc2: Timeout waiting for hardware interrupt. [ 13.935603] mmc2: sdhci: ============ SDHCI REGISTER DUMP =========== [ 13.942071] mmc2: sdhci: Sys addr: 0x00000000 | Version: 0x00000303 [ 13.948511] mmc2: sdhci: Blk size: 0x00007080 | Blk cnt: 0x00000001 [ 13.954948] mmc2: sdhci: Argument: 0x00000000 | Trn mode: 0x00000013 [ 13.961385] mmc2: sdhci: Present: 0x01fb00f0 | Host ctl: 0x00000031 [ 13.967821] mmc2: sdhci: Power: 0x00000001 | Blk gap: 0x00000000 [ 13.974263] mmc2: sdhci: Wake-up: 0x00000000 | Clock: 0x00000007 [ 13.980692] mmc2: sdhci: Timeout: 0x0000000e | Int stat: 0x00000000 [ 13.987119] mmc2: sdhci: Int enab: 0x02ff000b | Sig enab: 0x02fc000b [ 13.993546] mmc2: sdhci: AC12 err: 0x00000000 | Slot int: 0x00000000 [ 13.999974] mmc2: sdhci: Caps: 0x376fd080 | Caps_1: 0x10000f70 [ 14.006415] mmc2: sdhci: Cmd: 0x0000153a | Max curr: 0x00000000 [ 14.012845] mmc2: sdhci: Resp[0]: 0x00000b00 | Resp[1]: 0x048062bf [ 14.019272] mmc2: sdhci: Resp[2]: 0x314a8000 | Resp[3]: 0x00000240 [ 14.025697] mmc2: sdhci: Host ctl2: 0x0000000b [ 14.030132] mmc2: sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0xfbc6b208 [ 14.036561] mmc2: sdhci: ============================================ [ 14.044332] mmc2: new HS200 MMC card at address 0001 [ 14.050656] mmcblk2: mmc2:0001 016G30 14.7 GiB [ 14.056376] mmcblk2boot0: mmc2:0001 016G30 partition 1 4.00 MiB [ 14.063563] mmcblk2boot1: mmc2:0001 016G30 partition 2 4.00 MiB [ 14.069589] mmcblk2rpmb: mmc2:0001 016G30 partition 3 4.00 MiB, chardev (247:0) [ 14.078260] mmcblk2: p1 p2 After that it actually seems to work quite nicely: root@apalis-tk1-mainline:~# cat /sys/kernel/debug/mmc2/ios clock: 200000000 Hz actual clock: 163200000 Hz vdd: 21 (3.3 ~ 3.4 V) bus mode: 2 (push-pull) chip select: 0 (don't care) power mode: 2 (on) bus width: 3 (8 bits) timing spec: 9 (mmc HS200) signal voltage: 1 (1.80 V) driver type: 0 (driver type B) root@apalis-tk1-mainline:~# hdparm -t /dev/mmcblk2 /dev/mmcblk2: Timing buffered disk reads: 408 MB in 3.01 seconds = 135.39 MB/sec Have you ever observed similar behaviour? What could cause this? Anybody else tried it on TK1?
