media: imx-jpeg: Clear slot next desc ptr if config error

clear slot next desc ptr if config error,
otherwise codec will report config error interrupt repeatedly,
it may led to system hang.

Signed-off-by: Ming Qian <ming.qian@nxp.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

diff --git a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg-hw.c b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg-hw.c
index ef28122..bbd5d6a 100644 (file)
--- a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg-hw.c
+++ b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg-hw.c
@@ -178,3 +178,8 @@ void mxc_jpeg_set_desc(u32 desc, void __iomem *reg, int slot)
        writel(desc | MXC_NXT_DESCPT_EN,
               reg + MXC_SLOT_OFFSET(slot, SLOT_NXT_DESCPT_PTR));
 }
+
+void mxc_jpeg_clr_desc(void __iomem *reg, int slot)
+{
+       writel(0, reg + MXC_SLOT_OFFSET(slot, SLOT_NXT_DESCPT_PTR));
+}

diff --git a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg-hw.h b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg-hw.h
index ecf3b65..8b7cd65 100644 (file)
--- a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg-hw.h
+++ b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg-hw.h
@@ -137,6 +137,7 @@ void mxc_jpeg_set_bufsize(struct mxc_jpeg_desc *desc,  u32 bufsize);
 void mxc_jpeg_set_res(struct mxc_jpeg_desc *desc, u16 w, u16 h);
 void mxc_jpeg_set_line_pitch(struct mxc_jpeg_desc *desc, u32 line_pitch);
 void mxc_jpeg_set_desc(u32 desc, void __iomem *reg, int slot);
+void mxc_jpeg_clr_desc(void __iomem *reg, int slot);
 void mxc_jpeg_set_regs_from_desc(struct mxc_jpeg_desc *desc,
                                 void __iomem *reg);
 #endif

diff --git a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
index eb692e2..b2becf4 100644 (file)
--- a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
+++ b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
@@ -696,6 +696,7 @@ static irqreturn_t mxc_jpeg_dec_irq(int irq, void *priv)
                u32 ret = readl(reg + CAST_STATUS12);
 
                dev_err(dev, "Encoder/decoder error, status=0x%08x", ret);
+               mxc_jpeg_clr_desc(reg, slot);
                mxc_jpeg_sw_reset(reg);
                buf_state = VB2_BUF_STATE_ERROR;
                goto buffers_done;