Debugging the MMC controller of the Xperia XA2 Ultra

Hey I currently try to fix the aosp kernel mmc controller module of the XA2 Ultra/Plus, to make it detect my micro SD card. The issue is that the controller finds some IRQ but aborts strait as seen in my first log.

After applying the workaround from the stock kernel the controller aborts after CMD1. As seen in the log next to it.

The thing is that on the sister device (also belonging to the sony nile plattform) the mmc controller reads the micro SD card just fine.

So my question is why does the mmc controller aborts instead of reading further and why these workaround to these two specific devices? (SM22 and SM42).

My version of the workaround is located here.

dmesg |grep mmc1 before workaround:

    [    1.615003] mmc1: clk: 0 clk-gated: 0 claimer: (null) pwr: 0 host->irq = 16384
[    1.615140] mmc1: rpmstatus[pltfm](runtime-suspend:usage_count:disable_depth)(2:0:1)
[    1.615216] sdhci: ===========================================
[    1.615432] mmc1: SDHCI controller on c084000.sdhci [c084000.sdhci] using 64-bit ADMA in legacy mode
[    1.615721] mmc1: clock 0Hz busmode 1 powermode 1 cs 0 Vdd 18 width 0 timing 0
[    1.615734] mmc1: sdhci_msm_check_power_status: request 2 curr_pwr_state 0 curr_io_level 0
[    1.615772] mmc1: Received IRQ(215), status=0x2
[    1.616130] mmc1: Handled IRQ(215), ret=0, ack=0x1
[    1.616150] mmc1: sdhci_msm_check_power_status: request 2 done
[    1.616159] mmc1: sdhci_msm_check_power_status: request 8 curr_pwr_state 2 curr_io_level 8
[    1.616162] mmc1: sdhci_msm_check_power_status: request 8 done
[    1.621697] sdhci_msm c084000.sdhci: Initial signal voltage of 3.3v
[    1.632049] mmc1: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 18 width 0 timing 0
[    1.632127] mmc1: sdhci_msm_set_uhs_signaling-clock:400000 uhs mode:0 ctrl_2:0x0
[    1.643265] mmc1: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0 timing 0
[    1.643275] c084000.sdhci: Exit sdhci_msm_probe
[    1.643285] mmc1: sdhci_msm_set_uhs_signaling-clock:400000 uhs mode:0 ctrl_2:0x0
[    1.643291] mmc1: sdhci_msm_check_power_status: request 1 curr_pwr_state 2 curr_io_level 8
[    1.643562] mmc1: Received IRQ(215), status=0x1
[    1.643667] bimc-bwmon 1008000.qcom,cpu-bwmon: BW HWmon governor registered.
[    1.643690] mmc1: Handled IRQ(215), ret=0, ack=0x1
[    1.643744] mmc1: sdhci_msm_check_power_status: request 1 done
[    1.643750] mmc1: sdhci_msm_check_power_status: request 1 curr_pwr_state 1 curr_io_level 4
[    1.643759] mmc1: sdhci_msm_check_power_status: request 1 done
[    1.643772] mmc1: request to disable clocks

dmesg |grep mmc1 after workaround:

[    1.585850] ## mmc1: gpio_is_valid(pdata->uim2_gpio)=-2: failure
[    1.599193] ## mmc1: can't set uim2_gpio: -2
[    1.600391] sdhci [sdhci_add_host()]: mmc1: Auto-CMD23 available
[    1.601067] sdhci: =========== REGISTER DUMP (mmc1)===========
[    1.604778] mmc1: clk: 0 clk-gated: 0 claimer: (null) pwr: 0 host->irq = 16384
[    1.604904] mmc1: rpmstatus[pltfm](runtime-suspend:usage_count:disable_depth)(2:0:1)
[    1.605206] mmc1: SDHCI controller on c084000.sdhci [c084000.sdhci] using 64-bit ADMA in legacy mode
[    1.605475] mmc1: clock 0Hz busmode 1 powermode 1 cs 0 Vdd 18 width 0 timing 0
[    1.605487] mmc1: sdhci_msm_check_power_status: request 2 curr_pwr_state 0 curr_io_level 0
[    1.605527] mmc1: Received IRQ(215), status=0x2
[    1.605875] mmc1: Handled IRQ(215), ret=0, ack=0x1
[    1.605894] mmc1: sdhci_msm_check_power_status: request 2 done
[    1.605903] mmc1: sdhci_msm_check_power_status: request 8 curr_pwr_state 2 curr_io_level 8
[    1.605906] mmc1: sdhci_msm_check_power_status: request 8 done
[    1.622052] mmc1: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 18 width 0 timing 0
[    1.622135] mmc1: sdhci_msm_set_uhs_signaling-clock:400000 uhs mode:0 ctrl_2:0x0
[    1.633232] mmc1: mmc_rescan_try_freq: trying to init card at 400000 Hz
[    1.633362] mmc1: starting CMD52 arg 00000c00 flags 00000195
[    1.633733] sdhci [sdhci_irq()]: *** mmc1 got interrupt: 0x00018000
[    1.633853] mmc1: req done (CMD52): -110: 00000000 00000000 00000000 00000000
[    1.633880] mmc1: starting CMD52 arg 80000c08 flags 00000195
[    1.634247] sdhci [sdhci_irq()]: *** mmc1 got interrupt: 0x00018000
[    1.634364] mmc1: req done (CMD52): -110: 00000000 00000000 00000000 00000000
[    1.634392] mmc1: clock 400000Hz busmode 1 powermode 2 cs 1 Vdd 18 width 0 timing 0
[    1.634415] mmc1: sdhci_msm_set_uhs_signaling-clock:400000 uhs mode:0 ctrl_2:0x0
[    1.636478] mmc1: starting CMD0 arg 00000000 flags 000000c0
[    1.636637] sdhci [sdhci_irq()]: *** mmc1 got interrupt: 0x00000001
[    1.636656] mmc1: req done (CMD0): 0: 00000000 00000000 00000000 00000000
[    1.638702] mmc1: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 18 width 0 timing 0
[    1.638721] mmc1: sdhci_msm_set_uhs_signaling-clock:400000 uhs mode:0 ctrl_2:0x0
[    1.640781] mmc1: starting CMD8 arg 000001aa flags 000002f5
[    1.641147] sdhci [sdhci_irq()]: *** mmc1 got interrupt: 0x00018000
[    1.641266] mmc1: req done (CMD8): -110: 00000000 00000000 00000000 00000000
[    1.641289] mmc1: starting CMD5 arg 00000000 flags 000002e1
[    1.641651] sdhci [sdhci_irq()]: *** mmc1 got interrupt: 0x00018000
[    1.641783] mmc1: req failed (CMD5): -110, retrying...
[    1.642143] sdhci [sdhci_irq()]: *** mmc1 got interrupt: 0x00018000
[    1.642272] mmc1: req failed (CMD5): -110, retrying...
[    1.642633] sdhci [sdhci_irq()]: *** mmc1 got interrupt: 0x00018000
[    1.642762] mmc1: req failed (CMD5): -110, retrying...
[    1.643122] sdhci [sdhci_irq()]: *** mmc1 got interrupt: 0x00018000
[    1.643238] mmc1: req done (CMD5): -110: 00000000 00000000 00000000 00000000
[    1.643261] mmc1: starting CMD55 arg 00000000 flags 000000f5
[    1.643623] sdhci [sdhci_irq()]: *** mmc1 got interrupt: 0x00018000
[    1.643739] mmc1: req done (CMD55): -110: 00000000 00000000 00000000 00000000
[    1.643759] mmc1: starting CMD55 arg 00000000 flags 000000f5
[    1.644120] sdhci [sdhci_irq()]: *** mmc1 got interrupt: 0x00018000
[    1.644237] mmc1: req done (CMD55): -110: 00000000 00000000 00000000 00000000
[    1.644258] mmc1: starting CMD55 arg 00000000 flags 000000f5
[    1.644618] sdhci [sdhci_irq()]: *** mmc1 got interrupt: 0x00018000
[    1.644731] mmc1: req done (CMD55): -110: 00000000 00000000 00000000 00000000
[    1.644751] mmc1: starting CMD55 arg 00000000 flags 000000f5
[    1.645113] sdhci [sdhci_irq()]: *** mmc1 got interrupt: 0x00018000
[    1.645230] mmc1: req done (CMD55): -110: 00000000 00000000 00000000 00000000
[    1.645254] mmc1: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 18 width 0 timing 0
[    1.645273] mmc1: sdhci_msm_set_uhs_signaling-clock:400000 uhs mode:0 ctrl_2:0x0
[    1.645310] mmc1: starting CMD1 arg 00000000 flags 000000e1
[    1.645670] sdhci [sdhci_irq()]: *** mmc1 got interrupt: 0x00018000
[    1.645785] mmc1: req done (CMD1): -110: 00000000 00000000 00000000 00000000
[    1.645809] mmc1: clock 0Hz busmode 1 powermode 0 cs 0 Vdd 0 width 0 timing 0
[    1.645828] mmc1: sdhci_msm_set_uhs_signaling-clock:400000 uhs mode:0 ctrl_2:0x0
[    1.645834] mmc1: sdhci_msm_check_power_status: request 1 curr_pwr_state 2 curr_io_level 8
[    1.645995] mmc1: Received IRQ(215), status=0x1
[    1.646144] mmc1: Handled IRQ(215), ret=0, ack=0x1
[    1.646168] mmc1: sdhci_msm_check_power_status: request 1 done
[    1.646175] mmc1: sdhci_msm_check_power_status: request 1 curr_pwr_state 1 curr_io_level 4
[    1.646182] mmc1: sdhci_msm_check_power_status: request 1 done
[    1.646193] mmc1: request to disable clocks
[    1.849060] mmc1: frequency set to 0 in disable function, this means the clock is already disabled.

EDIT: It turns out that Sony forgot to redefine the gpio pin of the mmc controller compared to the reference board in the device tree.