Messages in this thread | | | Date | Tue, 09 Sep 2014 17:30:25 +0200 | From | Jacek Anaszewski <> | Subject | Re: [PATCH 2/3] [media] s5p-jpeg: Fix compilation with COMPILE_TEST |
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Hi Mauro, Sylwester,
On 09/09/2014 05:09 PM, Mauro Carvalho Chehab wrote: > Em Tue, 09 Sep 2014 16:58:58 +0200 > Sylwester Nawrocki <s.nawrocki@samsung.com> escreveu: > >> On 09/09/14 16:38, Mauro Carvalho Chehab wrote: >>> ERROR: "__bad_ndelay" [drivers/media/platform/s5p-jpeg/s5p-jpeg.ko] undefined! >>> >>> Yet, it sounds a bad idea to use ndelay to wait for 100 us >>> for the device to reset. >>> >>> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> >>> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com> >>> >>> diff --git a/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c b/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c >>> index e51c078360f5..01eeacf28843 100644 >>> --- a/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c >>> +++ b/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c >>> @@ -23,7 +23,9 @@ void exynos4_jpeg_sw_reset(void __iomem *base) >>> reg = readl(base + EXYNOS4_JPEG_CNTL_REG); >>> writel(reg & ~EXYNOS4_SOFT_RESET_HI, base + EXYNOS4_JPEG_CNTL_REG); >>> >>> +#ifndef CONFIG_COMPILE_TEST >>> ndelay(100000); >>> +#endif >> >> Wouldn't be a better fix to replace ndelay(100000); with udelay(100), >> rather than sticking in a not so pretty #ifndef ? > > Works for me. I'll submit a new version. > >> I guess usleep_range() couldn't simply be used, since >> exynos4_jpeg_sw_reset() is called with a spinlock held. > > Ok.
Within few days I will perform some hardware tests, to verify if there is more room for improvement here.
Best Regards, Jacek Anaszewski
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