Re: [PATCH] [media] s5p-jpeg: Clear JPEG_CODEC_ON bits in sw reset function
Hi, On 17/12/14 07:22, Tony K Nadackal wrote: > Bits EXYNOS4_DEC_MODE and EXYNOS4_ENC_MODE do not get cleared > on software reset. These bits need to be cleared explicitly. > > Signed-off-by: Tony K Nadackal > --- > This patch is created and tested on top of linux-next-20141210. > It can be cleanly applied on media-next and kgene/for-next. > > > drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c | 4 > 1 file changed, 4 insertions(+) > > diff --git a/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c > b/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c > index ab6d6f43..e53f13a 100644 > --- a/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c > +++ b/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c > @@ -21,6 +21,10 @@ void exynos4_jpeg_sw_reset(void __iomem *base) > unsigned int reg; > > reg = readl(base + EXYNOS4_JPEG_CNTL_REG); > + writel(reg & ~(EXYNOS4_DEC_MODE | EXYNOS4_ENC_MODE), > + base + EXYNOS4_JPEG_CNTL_REG); > + > + reg = readl(base + EXYNOS4_JPEG_CNTL_REG); Do we really need the second read? Wouldn't it also work as below ? reg = readl(base + EXYNOS4_JPEG_CNTL_REG); + reg &= ~(EXYNOS4_DEC_MODE | EXYNOS4_ENC_MODE); + writel(reg, base + EXYNOS4_JPEG_CNTL_REG); ? > writel(reg & ~EXYNOS4_SOFT_RESET_HI, base + EXYNOS4_JPEG_CNTL_REG); > > udelay(100); -- Thanks, Sylwester -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
RE: [PATCH] [media] s5p-jpeg: Clear JPEG_CODEC_ON bits in sw reset function
Gentle Reminder. Thanks Tony > -Original Message- > From: Tony K Nadackal [mailto:tony...@samsung.com] > Sent: Wednesday, December 17, 2014 11:52 AM > To: linux-me...@vger.kernel.org; linux-arm-ker...@lists.infradead.org; linux- > samsung-...@vger.kernel.org > Cc: mche...@osg.samsung.com; j.anaszew...@samsung.com; > kg...@kernel.org; k.deb...@samsung.com; s.nawro...@samsung.com; > bhusha...@samsung.com; Tony K Nadackal > Subject: [PATCH] [media] s5p-jpeg: Clear JPEG_CODEC_ON bits in sw reset > function > > Bits EXYNOS4_DEC_MODE and EXYNOS4_ENC_MODE do not get cleared on > software reset. These bits need to be cleared explicitly. > > Signed-off-by: Tony K Nadackal > --- > This patch is created and tested on top of linux-next-20141210. > It can be cleanly applied on media-next and kgene/for-next. > > > drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c | 4 > 1 file changed, 4 insertions(+) > > diff --git a/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c > b/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c > index ab6d6f43..e53f13a 100644 > --- a/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c > +++ b/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c > @@ -21,6 +21,10 @@ void exynos4_jpeg_sw_reset(void __iomem *base) > unsigned int reg; > > reg = readl(base + EXYNOS4_JPEG_CNTL_REG); > + writel(reg & ~(EXYNOS4_DEC_MODE | EXYNOS4_ENC_MODE), > + base + EXYNOS4_JPEG_CNTL_REG); > + > + reg = readl(base + EXYNOS4_JPEG_CNTL_REG); > writel(reg & ~EXYNOS4_SOFT_RESET_HI, base + > EXYNOS4_JPEG_CNTL_REG); > > udelay(100); > -- > 2.2.0 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH] [media] s5p-jpeg: Clear JPEG_CODEC_ON bits in sw reset function
Bits EXYNOS4_DEC_MODE and EXYNOS4_ENC_MODE do not get cleared on software reset. These bits need to be cleared explicitly. Signed-off-by: Tony K Nadackal --- This patch is created and tested on top of linux-next-20141210. It can be cleanly applied on media-next and kgene/for-next. drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c | 4 1 file changed, 4 insertions(+) diff --git a/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c b/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c index ab6d6f43..e53f13a 100644 --- a/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c +++ b/drivers/media/platform/s5p-jpeg/jpeg-hw-exynos4.c @@ -21,6 +21,10 @@ void exynos4_jpeg_sw_reset(void __iomem *base) unsigned int reg; reg = readl(base + EXYNOS4_JPEG_CNTL_REG); + writel(reg & ~(EXYNOS4_DEC_MODE | EXYNOS4_ENC_MODE), + base + EXYNOS4_JPEG_CNTL_REG); + + reg = readl(base + EXYNOS4_JPEG_CNTL_REG); writel(reg & ~EXYNOS4_SOFT_RESET_HI, base + EXYNOS4_JPEG_CNTL_REG); udelay(100); -- 2.2.0 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
