Messages in this thread Patch in this message | | | Date | Mon, 21 Apr 2014 21:28:47 +0800 | From | "Jin, Yao" <> | Subject | Re: [PATCH] pinctrl-baytrail: fix for irq descriptor conflict on ASUS T100TA |
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On 2014/4/21 14:27, Jin, Yao wrote: > > > On 2014/4/20 23:28, Adam Williamson wrote: >> On Sun, 2014-04-20 at 20:08 +0800, Jin, Yao wrote: >>> For the issue that touch screen doesn't work, could you check power >>> state of LPSS devices? For example: >>> >>> cd /sys/bus/acpi/devices >>> grep -H . */power_state >>> >>> If they are D3cold, it should be the reason why touch screen doesn't >>> work. That's another issue, unrelated to this gpio patch. >> >> The touch screen worked fine with kernel 3.14, and Benjamin looked at >> debug output from the attempt to load the touchscreen driver when >> diagnosing the problem, he's not just guessing. I am building a kernel >> without your patch to confirm that fixes it. >> > > I tried the clean kernel 3.14 with the boot option "nomodeset text" on > Dell Venue 11 Pro (If without "nomodeset",my ubuntu is being "black > screen", but that should be another i915 issue). > > After system starup, I executed the "startx" to launch the xwindow. In > xwindow, the touchscreen work. > > I tried the kernel 3.14 again with my gpio patch applied, the result was > the same, the touchscreen work. > > I also check the DSDT table of Dell Venue 11 Pro by searching the > keyword "Interrupt", I can't find any clue for the irq conflict. > > I'm sorry I don't have a Dell Venue 8 for testing, but I guess it's > similar to Dell Venue 11 Pro. > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
Could you also add following change to disable the runtime PM of HSUART? After that then check if your touchscreen work? It's to solve a known issue.The change is based on 3.14.
--- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -368,8 +368,6 @@ static int dw8250_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, data);
- pm_runtime_set_active(&pdev->dev); - pm_runtime_enable(&pdev->dev);
return 0; }
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