Quoting Shaik Sajida Bhanu (2021-07-16 04:46:14) > Whenever SDHC run at clock rate 50MHZ or below, the hardware data > timeout value will be 21.47secs, which is approx. 22secs and we have > a current software timeout value as 10secs. We have to set software > timeout value more than the hardware data timeout value to avioid seeing > the below register dumps. > > [ 332.953670] mmc2: Timeout waiting for hardware interrupt. > [ 332.959608] mmc2: sdhci: ============ SDHCI REGISTER DUMP =========== > [ 332.966450] mmc2: sdhci: Sys addr: 0x00000000 | Version: 0x00007202 > [ 332.973256] mmc2: sdhci: Blk size: 0x00000200 | Blk cnt: 0x00000001 > [ 332.980054] mmc2: sdhci: Argument: 0x00000000 | Trn mode: 0x00000027 > [ 332.986864] mmc2: sdhci: Present: 0x01f801f6 | Host ctl: 0x0000001f > [ 332.993671] mmc2: sdhci: Power: 0x00000001 | Blk gap: 0x00000000 > [ 333.000583] mmc2: sdhci: Wake-up: 0x00000000 | Clock: 0x00000007 > [ 333.007386] mmc2: sdhci: Timeout: 0x0000000e | Int stat: 0x00000000 > [ 333.014182] mmc2: sdhci: Int enab: 0x03ff100b | Sig enab: 0x03ff100b > [ 333.020976] mmc2: sdhci: ACmd stat: 0x00000000 | Slot int: 0x00000000 > [ 333.027771] mmc2: sdhci: Caps: 0x322dc8b2 | Caps_1: 0x0000808f > [ 333.034561] mmc2: sdhci: Cmd: 0x0000183a | Max curr: 0x00000000 > [ 333.041359] mmc2: sdhci: Resp[0]: 0x00000900 | Resp[1]: 0x00000000 > [ 333.048157] mmc2: sdhci: Resp[2]: 0x00000000 | Resp[3]: 0x00000000 > [ 333.054945] mmc2: sdhci: Host ctl2: 0x00000000 > [ 333.059657] mmc2: sdhci: ADMA Err: 0x00000000 | ADMA Ptr: > 0x0000000ffffff218 > [ 333.067178] mmc2: sdhci_msm: ----------- VENDOR REGISTER DUMP > ----------- > [ 333.074343] mmc2: sdhci_msm: DLL sts: 0x00000000 | DLL cfg: > 0x6000642c | DLL cfg2: 0x0020a000 > [ 333.083417] mmc2: sdhci_msm: DLL cfg3: 0x00000000 | DLL usr ctl: > 0x00000000 | DDR cfg: 0x80040873 > [ 333.092850] mmc2: sdhci_msm: Vndr func: 0x00008a9c | Vndr func2 : > 0xf88218a8 Vndr func3: 0x02626040 > [ 333.102371] mmc2: sdhci: ============================================ > > So, set software timeout value more than hardware timeout value. > Should this be tagged for stable trees? > Signed-off-by: Shaik Sajida Bhanu <sbhanu@xxxxxxxxxxxxxx> > Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx> > --- > > Changes since V3: > - Addressed minor comments from Adrain Hunter and retained his > Acked-by Signed-off. > > Changes since V2: > - Updated 22 with 22LL to avoid compiler warning as > suggested by Adrian Hunter. > - Added a check to update software data timeout value if its value > is less than the calculated hardware data timeout value as suggested > by Veerabhadrarao Badiganti. > Changes since V1: > - Moved software data timeout update part to qcom specific file > as suggested by Veerabhadrarao Badiganti.
