linux-kernel - [PATCH 1/9] [media] s5p-jpeg: Reset the Codec before doing a soft reset

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Message-Id: <1496419376-17099-2-git-send-email-thierry.escande@collabora.com>
Date:   Fri,  2 Jun 2017 18:02:48 +0200
From:   Thierry Escande <thierry.escande@...labora.com>
To:     Andrzej Pietrasiewicz <andrzej.p@...sung.com>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/9] [media] s5p-jpeg: Reset the Codec before doing a soft reset

From: Abhilash Kesavan <a.kesavan@...sung.com>

This patch resets the encoding and decoding register bits before doing a
soft reset.

Signed-off-by: Tony K Nadackal <tony.kn@...sung.com>
Signed-off-by: Thierry Escande <thierry.escande@...labora.com>
---
 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 a1d823a..9ad8f6d 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);
-- 
2.7.4