Samsung i927 fixes #40

cerg2010cerg2010 · 2021-06-14T15:38:25Z

Hello! Noticed that this Linux fork has support for Samsung SGH-i927 phone which I originally did for postmarketOS. However it's a bit broken, but this PR makes it working OK.

One thing that I don't understand is why the original 5.2.1 kernel which I worked with doesn't have the issue with colors inverted, but this has with both grate/tegra DRM drivers.

IRQF_NO_AUTOEN flag doesn't go well with IRQF_SHARED flag - the check in request_threaded_irq fails and exits with EINVAL. So we ignore the flag and enable it on the first IRQ request. No interrupt should arrive from the chip as all interrupts are masked by default. Signed-off-by: Sergey Larin <[email protected]>

Pixel format of the panel on this device is ABGR, not the typical RGBA format. There's no way to switch the pixel format in panel as there's no documenation, so do this in DRM driver instead. The proper solution would require checking MEDIA_BUS_FMT_* values in DRM driver and setting this value correctly in panel driver. Signed-off-by: Sergey Larin <[email protected]>

The GPIO value wasn't changed after GPIO API changes - the GPIO is now ACTIVE_LOW in device tree instead of ACTIVE_HIGH. Signed-off-by: Sergey Larin <[email protected]>

The codec name in wm8994 driver is 'wm8994-aif1', not the 'wm8994-hifi' as there are 2 interfaces. Signed-off-by: Sergey Larin <[email protected]>

The mclk_id value wasn't set, so setting clocks in wm8994_set_dai_sysclk failed with an error. This led to other failures in output configuration. Signed-off-by: Sergey Larin <[email protected]>

Recent max8903 driver changes assume that GPIO polarity is active-low by default, while older driver assumes it's active-high. Adjust the values accordingly. Signed-off-by: Sergey Larin <[email protected]>

The wlf_ldo regulator is not enabled now by default, so the initialization routine failed because the device was powered off. Make the regulator always-on for now to avoid this. Also routing was changed to work with new tegra_wm8994 driver. Signed-off-by: Sergey Larin <[email protected]>

digetx · 2021-06-14T21:24:32Z

Hi,

Very nice to see that you're continuing to work on this device! I don't think that anything changed in Tegra DRM driver since 5.2. Have you checked changes of the panel driver?

digetx · 2021-06-14T21:28:26Z

arch/arm/boot/dts/tegra20-glide.dts

-			"Int Spk", "SPKOUTLP",
-			"Int Spk", "SPKOUTLN",
+			"Speakers", "SPKOUTLP",
+			"Speakers", "SPKOUTLN",
 			"Headphone Jack", "HPOUT1L",
 			"Headphone Jack", "HPOUT1R",
-			"Earpiece Spk", "HPOUT2P",
-			"Earpiece Spk", "HPOUT2N",
+			"Int Spk", "HPOUT2P",
+			"Int Spk", "HPOUT2N",


I overlooked that WM8994 used custom DAPM widgets when converted driver to use new unified machine framework. We can add back the customized widgets if you think that they are more appropriate.

digetx · 2021-06-14T21:31:36Z

drivers/mfd/max8907.c

 	}

 	ret = regmap_add_irq_chip(max8907->regmap_gen, max8907->i2c_gen->irq,
-				  IRQF_ONESHOT | IRQF_SHARED | IRQF_NO_AUTOEN,
+				  IRQF_ONESHOT | IRQF_SHARED,
 				  -1, &max8907_chg_irq_chip,
 				  &max8907->irqc_chg);
 	if (ret != 0) {


Should be good to send this patch to LKML right now since it fixes a generic bug.

digetx · 2021-06-14T21:51:24Z

The changes look good to me, thank you! I'll merge this PR now, please create a new PR with the further changes.

Looks like the i927 support is very close to upstreamable state. So far we'll need to:

Wire up support of DRM_MODE_FLAG_NV/HSYNC flags to Tegra DRM driver.
Figure out whether the color swap is needed.
Add DT binding for WM8994 and max8893.
Add samsung,i927 compatible to the list of Tegra20 DT boards.
Upstream the regulator patches.

Then the i927 support patches should be ready for upstreaming.

The regulator patches should be independent from the Tegra patches, so it should be good to finish them first and send to upstream ASAP since reviewing will take some time.

The "auxtrace_info" and "auxtrace" functions are not set in "tool" member of "annotate". As a result, perf annotate does not support parsing itrace data. Before: # perf record -e arm_spe_0/branch_filter=1/ -a sleep 1 [ perf record: Woken up 9 times to write data ] [ perf record: Captured and wrote 20.874 MB perf.data ] # perf annotate --stdio Error: The perf.data data has no samples! Solution: 1. Add itrace options in help, 2. Set hook functions of "id_index", "auxtrace_info" and "auxtrace" in perf_tool. After: # perf record --all-user -e arm_spe_0/branch_filter=1/ ls Couldn't synthesize bpf events. perf.data [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.010 MB perf.data ] # perf annotate --stdio Percent | Source code & Disassembly of libc-2.28.so for branch-miss (1 samples, percent: local period) ------------------------------------------------------------------------------------------------------------ : : : : Disassembly of section .text: : : 0000000000066180 <__getdelim@@GLIBC_2.17>: 0.00 : 66180: stp x29, x30, [sp, #-96]! 0.00 : 66184: cmp x0, #0x0 0.00 : 66188: ccmp x1, #0x0, #0x4, ne // ne = any 0.00 : 6618c: mov x29, sp 0.00 : 66190: stp x24, x25, [sp, #56] 0.00 : 66194: stp x26, x27, [sp, #72] 0.00 : 66198: str x28, [sp, #88] 0.00 : 6619c: b.eq 66450 <__getdelim@@GLIBC_2.17+0x2d0> // b.none 0.00 : 661a0: stp x22, x23, [x29, #40] 0.00 : 661a4: mov x22, x1 0.00 : 661a8: ldr w1, [x3] 0.00 : 661ac: mov w23, w2 0.00 : 661b0: stp x20, x21, [x29, #24] 0.00 : 661b4: mov x20, x3 0.00 : 661b8: mov x21, x0 0.00 : 661bc: tbnz w1, #15, 66360 <__getdelim@@GLIBC_2.17+0x1e0> 0.00 : 661c0: ldr x0, [x3, #136] 0.00 : 661c4: ldr x2, [x0, #8] 0.00 : 661c8: str x19, [x29, #16] 0.00 : 661cc: mrs x19, tpidr_el0 0.00 : 661d0: sub x19, x19, #0x700 0.00 : 661d4: cmp x2, x19 0.00 : 661d8: b.eq 663f0 <__getdelim@@GLIBC_2.17+0x270> // b.none 0.00 : 661dc: mov w1, #0x1 // #1 0.00 : 661e0: ldaxr w2, [x0] 0.00 : 661e4: cmp w2, #0x0 0.00 : 661e8: b.ne 661f4 <__getdelim@@GLIBC_2.17+0x74> // b.any 0.00 : 661ec: stxr w3, w1, [x0] 0.00 : 661f0: cbnz w3, 661e0 <__getdelim@@GLIBC_2.17+0x60> 0.00 : 661f4: b.ne 66448 <__getdelim@@GLIBC_2.17+0x2c8> // b.any 0.00 : 661f8: ldr x0, [x20, #136] 0.00 : 661fc: ldr w1, [x20] 0.00 : 66200: ldr w2, [x0, #4] 0.00 : 66204: str x19, [x0, #8] 0.00 : 66208: add w2, w2, #0x1 0.00 : 6620c: str w2, [x0, #4] 0.00 : 66210: tbnz w1, #5, 66388 <__getdelim@@GLIBC_2.17+0x208> 0.00 : 66214: ldr x19, [x29, #16] 0.00 : 66218: ldr x0, [x21] 0.00 : 6621c: cbz x0, 66228 <__getdelim@@GLIBC_2.17+0xa8> 0.00 : 66220: ldr x0, [x22] 0.00 : 66224: cbnz x0, 6623c <__getdelim@@GLIBC_2.17+0xbc> 0.00 : 66228: mov x0, #0x78 // #120 0.00 : 6622c: str x0, [x22] 0.00 : 66230: bl 20710 <malloc@plt> 0.00 : 66234: str x0, [x21] 0.00 : 66238: cbz x0, 66428 <__getdelim@@GLIBC_2.17+0x2a8> 0.00 : 6623c: ldr x27, [x20, #8] 0.00 : 66240: str x19, [x29, #16] 0.00 : 66244: ldr x19, [x20, #16] 0.00 : 66248: sub x19, x19, x27 0.00 : 6624c: cmp x19, #0x0 0.00 : 66250: b.le 66398 <__getdelim@@GLIBC_2.17+0x218> 0.00 : 66254: mov x25, #0x0 // #0 0.00 : 66258: b 662d8 <__getdelim@@GLIBC_2.17+0x158> 0.00 : 6625c: nop 0.00 : 66260: add x24, x19, x25 0.00 : 66264: ldr x3, [x22] 0.00 : 66268: add x26, x24, #0x1 0.00 : 6626c: ldr x0, [x21] 0.00 : 66270: cmp x3, x26 0.00 : 66274: b.cs 6629c <__getdelim@@GLIBC_2.17+0x11c> // b.hs, b.nlast 0.00 : 66278: lsl x3, x3, #1 0.00 : 6627c: cmp x3, x26 0.00 : 66280: csel x26, x3, x26, cs // cs = hs, nlast 0.00 : 66284: mov x1, x26 0.00 : 66288: bl 206f0 <realloc@plt> 0.00 : 6628c: cbz x0, 66438 <__getdelim@@GLIBC_2.17+0x2b8> 0.00 : 66290: str x0, [x21] 0.00 : 66294: ldr x27, [x20, #8] 0.00 : 66298: str x26, [x22] 0.00 : 6629c: mov x2, x19 0.00 : 662a0: mov x1, x27 0.00 : 662a4: add x0, x0, x25 0.00 : 662a8: bl 87390 <explicit_bzero@@GLIBC_2.25+0x50> 0.00 : 662ac: ldr x0, [x20, #8] 0.00 : 662b0: add x19, x0, x19 0.00 : 662b4: str x19, [x20, #8] 0.00 : 662b8: cbnz x28, 66410 <__getdelim@@GLIBC_2.17+0x290> 0.00 : 662bc: mov x0, x20 0.00 : 662c0: bl 73b80 <__underflow@@GLIBC_2.17> 0.00 : 662c4: cmn w0, #0x1 0.00 : 662c8: b.eq 66410 <__getdelim@@GLIBC_2.17+0x290> // b.none 0.00 : 662cc: ldp x27, x19, [x20, #8] 0.00 : 662d0: mov x25, x24 0.00 : 662d4: sub x19, x19, x27 0.00 : 662d8: mov x2, x19 0.00 : 662dc: mov w1, w23 0.00 : 662e0: mov x0, x27 0.00 : 662e4: bl 807b0 <memchr@@GLIBC_2.17> 0.00 : 662e8: cmp x0, #0x0 0.00 : 662ec: mov x28, x0 0.00 : 662f0: sub x0, x0, x27 0.00 : 662f4: csinc x19, x19, x0, eq // eq = none 0.00 : 662f8: mov x0, #0x7fffffffffffffff // #9223372036854775807 0.00 : 662fc: sub x0, x0, x25 0.00 : 66300: cmp x19, x0 0.00 : 66304: b.lt 66260 <__getdelim@@GLIBC_2.17+0xe0> // b.tstop 0.00 : 66308: adrp x0, 17f000 <sys_sigabbrev@@GLIBC_2.17+0x320> 0.00 : 6630c: ldr x0, [x0, #3624] 0.00 : 66310: mrs x2, tpidr_el0 0.00 : 66314: ldr x19, [x29, #16] 0.00 : 66318: mov w3, #0x4b // #75 0.00 : 6631c: ldr w1, [x20] 0.00 : 66320: mov x24, #0xffffffffffffffff // #-1 0.00 : 66324: str w3, [x2, x0] 0.00 : 66328: tbnz w1, #15, 66340 <__getdelim@@GLIBC_2.17+0x1c0> 0.00 : 6632c: ldr x0, [x20, #136] 0.00 : 66330: ldr w1, [x0, #4] 0.00 : 66334: sub w1, w1, #0x1 0.00 : 66338: str w1, [x0, #4] 0.00 : 6633c: cbz w1, 663b8 <__getdelim@@GLIBC_2.17+0x238> 0.00 : 66340: mov x0, x24 0.00 : 66344: ldr x28, [sp, #88] 0.00 : 66348: ldp x20, x21, [x29, #24] 0.00 : 6634c: ldp x22, x23, [x29, #40] 0.00 : 66350: ldp x24, x25, [sp, #56] 0.00 : 66354: ldp x26, x27, [sp, #72] 0.00 : 66358: ldp x29, x30, [sp], #96 0.00 : 6635c: ret 100.00 : 66360: tbz w1, #5, 66218 <__getdelim@@GLIBC_2.17+0x98> 0.00 : 66364: ldp x20, x21, [x29, #24] 0.00 : 66368: mov x24, #0xffffffffffffffff // #-1 0.00 : 6636c: ldp x22, x23, [x29, #40] 0.00 : 66370: mov x0, x24 0.00 : 66374: ldp x24, x25, [sp, #56] 0.00 : 66378: ldp x26, x27, [sp, #72] 0.00 : 6637c: ldr x28, [sp, #88] 0.00 : 66380: ldp x29, x30, [sp], #96 0.00 : 66384: ret 0.00 : 66388: mov x24, #0xffffffffffffffff // #-1 0.00 : 6638c: ldr x19, [x29, #16] 0.00 : 66390: b 66328 <__getdelim@@GLIBC_2.17+0x1a8> 0.00 : 66394: nop 0.00 : 66398: mov x0, x20 0.00 : 6639c: bl 73b80 <__underflow@@GLIBC_2.17> 0.00 : 663a0: cmn w0, #0x1 0.00 : 663a4: b.eq 66438 <__getdelim@@GLIBC_2.17+0x2b8> // b.none 0.00 : 663a8: ldp x27, x19, [x20, #8] 0.00 : 663ac: sub x19, x19, x27 0.00 : 663b0: b 66254 <__getdelim@@GLIBC_2.17+0xd4> 0.00 : 663b4: nop 0.00 : 663b8: str xzr, [x0, #8] 0.00 : 663bc: ldxr w2, [x0] 0.00 : 663c0: stlxr w3, w1, [x0] 0.00 : 663c4: cbnz w3, 663bc <__getdelim@@GLIBC_2.17+0x23c> 0.00 : 663c8: cmp w2, #0x1 0.00 : 663cc: b.le 66340 <__getdelim@@GLIBC_2.17+0x1c0> 0.00 : 663d0: mov x1, #0x81 // #129 0.00 : 663d4: mov x2, #0x1 // #1 0.00 : 663d8: mov x3, #0x0 // #0 0.00 : 663dc: mov x8, #0x62 // #98 0.00 : 663e0: svc #0x0 0.00 : 663e4: ldp x20, x21, [x29, #24] 0.00 : 663e8: ldp x22, x23, [x29, #40] 0.00 : 663ec: b 66370 <__getdelim@@GLIBC_2.17+0x1f0> 0.00 : 663f0: ldr w2, [x0, #4] 0.00 : 663f4: add w2, w2, #0x1 0.00 : 663f8: str w2, [x0, #4] 0.00 : 663fc: tbz w1, #5, 66214 <__getdelim@@GLIBC_2.17+0x94> 0.00 : 66400: mov x24, #0xffffffffffffffff // #-1 0.00 : 66404: ldr x19, [x29, #16] 0.00 : 66408: b 66330 <__getdelim@@GLIBC_2.17+0x1b0> 0.00 : 6640c: nop 0.00 : 66410: ldr x0, [x21] 0.00 : 66414: strb wzr, [x0, x24] 0.00 : 66418: ldr w1, [x20] 0.00 : 6641c: ldr x19, [x29, #16] 0.00 : 66420: b 66328 <__getdelim@@GLIBC_2.17+0x1a8> 0.00 : 66424: nop 0.00 : 66428: mov x24, #0xffffffffffffffff // #-1 0.00 : 6642c: ldr w1, [x20] 0.00 : 66430: b 66328 <__getdelim@@GLIBC_2.17+0x1a8> 0.00 : 66434: nop 0.00 : 66438: mov x24, #0xffffffffffffffff // #-1 0.00 : 6643c: ldr w1, [x20] 0.00 : 66440: ldr x19, [x29, #16] 0.00 : 66444: b 66328 <__getdelim@@GLIBC_2.17+0x1a8> 0.00 : 66448: bl e3ba0 <pthread_setcanceltype@@GLIBC_2.17+0x30> 0.00 : 6644c: b 661f8 <__getdelim@@GLIBC_2.17+0x78> 0.00 : 66450: adrp x0, 17f000 <sys_sigabbrev@@GLIBC_2.17+0x320> 0.00 : 66454: ldr x0, [x0, #3624] 0.00 : 66458: mrs x1, tpidr_el0 0.00 : 6645c: mov w2, #0x16 // #22 0.00 : 66460: mov x24, #0xffffffffffffffff // #-1 0.00 : 66464: str w2, [x1, x0] 0.00 : 66468: b 66370 <__getdelim@@GLIBC_2.17+0x1f0> 0.00 : 6646c: ldr w1, [x20] 0.00 : 66470: mov x4, x0 0.00 : 66474: tbnz w1, #15, 6648c <__getdelim@@GLIBC_2.17+0x30c> 0.00 : 66478: ldr x0, [x20, #136] 0.00 : 6647c: ldr w1, [x0, #4] 0.00 : 66480: sub w1, w1, #0x1 0.00 : 66484: str w1, [x0, #4] 0.00 : 66488: cbz w1, 66494 <__getdelim@@GLIBC_2.17+0x314> 0.00 : 6648c: mov x0, x4 0.00 : 66490: bl 20e40 <gnu_get_libc_version@@GLIBC_2.17+0x130> 0.00 : 66494: str xzr, [x0, #8] 0.00 : 66498: ldxr w2, [x0] 0.00 : 6649c: stlxr w3, w1, [x0] 0.00 : 664a0: cbnz w3, 66498 <__getdelim@@GLIBC_2.17+0x318> 0.00 : 664a4: cmp w2, #0x1 0.00 : 664a8: b.le 6648c <__getdelim@@GLIBC_2.17+0x30c> 0.00 : 664ac: mov x1, #0x81 // #129 0.00 : 664b0: mov x2, #0x1 // #1 0.00 : 664b4: mov x3, #0x0 // #0 0.00 : 664b8: mov x8, #0x62 // #98 0.00 : 664bc: svc #0x0 0.00 : 664c0: b 6648c <__getdelim@@GLIBC_2.17+0x30c> Signed-off-by: Yang Jihong <[email protected]> Tested-by: Leo Yan <[email protected]> Acked-by: Adrian Hunter <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

[ Upstream commit 1a45200 ] In 'bt878_irq', the driver calls 'tasklet_schedule', but this tasklet is set in 'dvb_bt8xx_load_card' of another driver 'dvb-bt8xx'. However, this two drivers are separate. The user may not load the 'dvb-bt8xx' driver when loading the 'bt8xx' driver, that is, the tasklet has not been initialized when 'tasklet_schedule' is called, so it is necessary to check whether the tasklet is initialized in 'bt878_probe'. Fix this by adding a check at the end of bt878_probe. The KASAN's report reveals it: BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 PGD 800000006aab2067 P4D 800000006aab2067 PUD 6b2ea067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN PTI CPU: 2 PID: 8724 Comm: syz-executor.0 Not tainted 4.19.177- gdba4159c14ef-dirty grate-driver#40 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59- gc9ba5276e321-prebuilt.qemu.org 04/01/2014 RIP: 0010: (null) Code: Bad RIP value. RSP: 0018:ffff88806c287ea0 EFLAGS: 00010246 RAX: fffffbfff1b01774 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 1ffffffff1b01775 RDI: 0000000000000000 RBP: ffff88806c287f00 R08: fffffbfff1b01774 R09: fffffbfff1b01774 R10: 0000000000000001 R11: fffffbfff1b01773 R12: 0000000000000000 R13: ffff88806c29f530 R14: ffffffff8d80bb88 R15: ffffffff8d80bb90 FS: 00007f6b550e6700(0000) GS:ffff88806c280000(0000) knlGS: 0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000005ec98000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> tasklet_action_common.isra.17+0x141/0x420 kernel/softirq.c:522 tasklet_action+0x50/0x70 kernel/softirq.c:540 __do_softirq+0x224/0x92c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x15a/0x180 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:535 [inline] do_IRQ+0x123/0x1e0 arch/x86/kernel/irq.c:260 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:670 </IRQ> RIP: 0010:__do_sys_interrupt kernel/sys.c:2593 [inline] RIP: 0010:__se_sys_interrupt kernel/sys.c:2584 [inline] RIP: 0010:__x64_sys_interrupt+0x5b/0x80 kernel/sys.c:2584 Code: ba 00 04 00 00 48 c7 c7 c0 99 31 8c e8 ae 76 5e 01 48 85 c0 75 21 e8 14 ae 24 00 48 c7 c3 c0 99 31 8c b8 0c 00 00 00 0f 01 c1 <31> db e8 fe ad 24 00 48 89 d8 5b 5d c3 48 c7 c3 ea ff ff ff eb ec RSP: 0018:ffff888054167f10 EFLAGS: 00000212 ORIG_RAX: ffffffffffffffde RAX: 000000000000000c RBX: ffffffff8c3199c0 RCX: ffffc90001ca6000 RDX: 000000000000001a RSI: ffffffff813478fc RDI: ffffffff8c319dc0 RBP: ffff888054167f18 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000080 R11: fffffbfff18633b7 R12: ffff888054167f58 R13: ffff88805f638000 R14: 0000000000000000 R15: 0000000000000000 do_syscall_64+0xb0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4692a9 Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6b550e5c48 EFLAGS: 00000246 ORIG_RAX: 000000000000014f RAX: ffffffffffffffda RBX: 000000000077bf60 RCX: 00000000004692a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000140 RBP: 00000000004cf7eb R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000077bf60 R13: 0000000000000000 R14: 000000000077bf60 R15: 00007fff55a1dca0 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) CR2: 0000000000000000 ---[ end trace 68e5849c3f77cbb6 ]--- RIP: 0010: (null) Code: Bad RIP value. RSP: 0018:ffff88806c287ea0 EFLAGS: 00010246 RAX: fffffbfff1b01774 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 1ffffffff1b01775 RDI: 0000000000000000 RBP: ffff88806c287f00 R08: fffffbfff1b01774 R09: fffffbfff1b01774 R10: 0000000000000001 R11: fffffbfff1b01773 R12: 0000000000000000 R13: ffff88806c29f530 R14: ffffffff8d80bb88 R15: ffffffff8d80bb90 FS: 00007f6b550e6700(0000) GS:ffff88806c280000(0000) knlGS: 0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000005ec98000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Reported-by: Zheyu Ma <[email protected]> Signed-off-by: Zheyu Ma <[email protected]> Signed-off-by: Hans Verkuil <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]> Signed-off-by: Sasha Levin <[email protected]>

…king KUEP Commit b5efec0 ("powerpc/32s: Move KUEP locking/unlocking in C") removed the 'isync' instruction after adding/removing NX bit in user segments. The reasoning behind this change was that when setting the NX bit we don't mind it taking effect with delay as the kernel never executes text from userspace, and when clearing the NX bit this is to return to userspace and then the 'rfi' should synchronise the context. However, it looks like on book3s/32 having a hash page table, at least on the G3 processor, we get an unexpected fault from userspace, then this is followed by something wrong in the verification of MSR_PR at end of another interrupt. This is fixed by adding back the removed isync() following update of NX bit in user segment registers. Only do it for cores with an hash table, as 603 cores don't exhibit that problem and the two isync increase ./null_syscall selftest by 6 cycles on an MPC 832x. First problem: unexpected WARN_ON() for mysterious PROTFAULT WARNING: CPU: 0 PID: 1660 at arch/powerpc/mm/fault.c:354 do_page_fault+0x6c/0x5b0 Modules linked in: CPU: 0 PID: 1660 Comm: Xorg Not tainted 5.13.0-pmac-00028-gb3c15b60339a #40 NIP: c001b5c8 LR: c001b6f8 CTR: 00000000 REGS: e2d09e40 TRAP: 0700 Not tainted (5.13.0-pmac-00028-gb3c15b60339a) MSR: 00021032 <ME,IR,DR,RI> CR: 42d04f30 XER: 20000000 GPR00: c000424c e2d09f00 c301b680 e2d09f40 0000001e 42000000 00cba028 00000000 GPR08: 08000000 48000010 c301b680 e2d09f30 22d09f30 00c1fff0 00cba000 a7b7ba4c GPR16: 00000031 00000000 00000000 00000000 00000000 00000000 a7b7b0d0 00c5c010 GPR24: a7b7b64c a7b7d2f0 00000004 00000000 c1efa6c0 00cba02c 00000300 e2d09f40 NIP [c001b5c8] do_page_fault+0x6c/0x5b0 LR [c001b6f8] do_page_fault+0x19c/0x5b0 Call Trace: [e2d09f00] [e2d09f04] 0xe2d09f04 (unreliable) [e2d09f30] [c000424c] DataAccess_virt+0xd4/0xe4 --- interrupt: 300 at 0xa7a261dc NIP: a7a261dc LR: a7a253bc CTR: 00000000 REGS: e2d09f40 TRAP: 0300 Not tainted (5.13.0-pmac-00028-gb3c15b60339a) MSR: 0000d032 <EE,PR,ME,IR,DR,RI> CR: 228428e2 XER: 20000000 DAR: 00cba02c DSISR: 42000000 GPR00: a7a27448 afa6b0e0 a74c35c0 a7b7b614 0000001e a7b7b614 00cba028 00000000 GPR08: 00020fd9 00000031 00cb9ff8 a7a273b0 220028e2 00c1fff0 00cba000 a7b7ba4c GPR16: 00000031 00000000 00000000 00000000 00000000 00000000 a7b7b0d0 00c5c010 GPR24: a7b7b64c a7b7d2f0 00000004 00000002 0000001e a7b7b614 a7b7aff4 00000030 NIP [a7a261dc] 0xa7a261dc LR [a7a253bc] 0xa7a253bc --- interrupt: 300 Instruction dump: 7c4a1378 810300a0 75278410 83820298 83a300a4 553b018c 551e0036 4082038c 2e1b0000 40920228 75280800 41820220 <0fe00000> 3b600000 41920214 81420594 Second problem: MSR PR is seen unset allthough the interrupt frame shows it set kernel BUG at arch/powerpc/kernel/interrupt.c:458! Oops: Exception in kernel mode, sig: 5 [#1] BE PAGE_SIZE=4K MMU=Hash SMP NR_CPUS=2 PowerMac Modules linked in: CPU: 0 PID: 1660 Comm: Xorg Tainted: G W 5.13.0-pmac-00028-gb3c15b60339a #40 NIP: c0011434 LR: c001629c CTR: 00000000 REGS: e2d09e70 TRAP: 0700 Tainted: G W (5.13.0-pmac-00028-gb3c15b60339a) MSR: 00029032 <EE,ME,IR,DR,RI> CR: 42d09f30 XER: 00000000 GPR00: 00000000 e2d09f30 c301b680 e2d09f40 83440000 c44d0e68 e2d09e8c 00000000 GPR08: 00000002 00dc228a 00004000 e2d09f30 22d09f30 00c1fff0 afa6ceb4 00c26144 GPR16: 00c25fb8 00c26140 afa6ceb8 90000000 00c944d8 0000001c 00000000 00200000 GPR24: 00000000 000001fb afa6d1b4 00000001 00000000 a539a2a0 a530fd80 00000089 NIP [c0011434] interrupt_exit_kernel_prepare+0x10/0x70 LR [c001629c] interrupt_return+0x9c/0x144 Call Trace: [e2d09f30] [c000424c] DataAccess_virt+0xd4/0xe4 (unreliable) --- interrupt: 300 at 0xa09be008 NIP: a09be008 LR: a09bdfe8 CTR: a09bdfc0 REGS: e2d09f40 TRAP: 0300 Tainted: G W (5.13.0-pmac-00028-gb3c15b60339a) MSR: 0000d032 <EE,PR,ME,IR,DR,RI> CR: 420028e2 XER: 20000000 DAR: a539a308 DSISR: 0a000000 GPR00: a7b90d50 afa6b2d0 a74c35c0 a0a8b690 a0a8b698 a5365d70 a4fa82a8 00000004 GPR08: 00000000 a09bdfc0 00000000 a5360000 a09bde7c 00c1fff0 afa6ceb4 00c26144 GPR16: 00c25fb8 00c26140 afa6ceb8 90000000 00c944d8 0000001c 00000000 00200000 GPR24: 00000000 000001fb afa6d1b4 00000001 00000000 a539a2a0 a530fd80 00000089 NIP [a09be008] 0xa09be008 LR [a09bdfe8] 0xa09bdfe8 --- interrupt: 300 Instruction dump: 80010024 83e1001c 7c0803a6 4bffff80 3bc00800 4bffffd0 486b42fd 4bffffcc 81430084 71480002 41820038 554a0462 <0f0a0000> 80620060 74630001 40820034 Fixes: b5efec0 ("powerpc/32s: Move KUEP locking/unlocking in C") Cc: [email protected] # v5.13+ Reported-by: Stan Johnson <[email protected]> Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/4856f5574906e2aec0522be17bf3848a22b2cd0b.1629269345.git.christophe.leroy@csgroup.eu

eMPee584 · 2023-08-21T10:53:27Z

2 years later.. Do you know how much of this has happened in the meantime? would love to revive my long-time favorite phone with pmOS..

Looks like the i927 support is very close to upstreamable state. So far we'll need to:
1. Wire up support of DRM_MODE_FLAG_NV/HSYNC flags to Tegra DRM driver.
2. Figure out whether the color swap is needed.
3. Add DT binding for WM8994 and max8893.
4. Add samsung,i927 compatible to the list of Tegra20 DT boards.
5. Upstream the regulator patches.
Then the i927 support patches should be ready for upstreaming.

maximschwalm · 2023-08-30T22:14:52Z

2 years later.. Do you know how much of this has happened in the meantime? would love to revive my long-time favorite phone with pmOS..
Looks like the i927 support is very close to upstreamable state. So far we'll need to:
1. Wire up support of DRM_MODE_FLAG_NV/HSYNC flags to Tegra DRM driver.

This part is currently being upstreamed thanks to @tomba.

2. Figure out whether the color swap is needed.
3. Add DT binding for WM8994 and max8893.

The 3rd part seems to be done already.

4. Add samsung,i927 compatible to the list of Tegra20 DT boards.

See: ddbfa1f

5. Upstream the regulator patches.
Then the i927 support patches should be ready for upstreaming.

cerg2010cerg2010 added 7 commits June 14, 2021 17:30

power: supply: max8903: OTG disable fix

1e16a65

The GPIO value wasn't changed after GPIO API changes - the GPIO is now ACTIVE_LOW in device tree instead of ACTIVE_HIGH. Signed-off-by: Sergey Larin <[email protected]>

ASoC: tegra_wm8994: Fix codec name

5b518f0

The codec name in wm8994 driver is 'wm8994-aif1', not the 'wm8994-hifi' as there are 2 interfaces. Signed-off-by: Sergey Larin <[email protected]>

ASoC: tegra_wm8994: Set mclk ID value

afd9811

The mclk_id value wasn't set, so setting clocks in wm8994_set_dai_sysclk failed with an error. This led to other failures in output configuration. Signed-off-by: Sergey Larin <[email protected]>

ARM: dts: tegra20-glide: Fix GPIO polarity for max8903

bb79152

Recent max8903 driver changes assume that GPIO polarity is active-low by default, while older driver assumes it's active-high. Adjust the values accordingly. Signed-off-by: Sergey Larin <[email protected]>

digetx reviewed Jun 14, 2021

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digetx merged commit 8d7fcb7 into grate-driver:master Jun 14, 2021

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Samsung i927 fixes #40

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Samsung i927 fixes #40

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