[media] atmel-isi: add sanity check for supported formats in try/set_fmt()

After adding the format check in try_fmt()/set_fmt(), we don't need any
format check in configure_geometry(). So make configure_geometry() as
void type.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c
index add3245..a3ddec7 100644 (file)
--- a/drivers/media/platform/soc_camera/atmel-isi.c
+++ b/drivers/media/platform/soc_camera/atmel-isi.c
@@ -102,17 +102,19 @@ static u32 isi_readl(struct atmel_isi *isi, u32 reg)
        return readl(isi->regs + reg);
 }
 
-static int configure_geometry(struct atmel_isi *isi, u32 width,
+static void configure_geometry(struct atmel_isi *isi, u32 width,
                        u32 height, u32 code)
 {
        u32 cfg2;
 
        /* According to sensor's output format to set cfg2 */
        switch (code) {
-       /* YUV, including grey */
+       default:
+       /* Grey */
        case MEDIA_BUS_FMT_Y8_1X8:
                cfg2 = ISI_CFG2_GRAYSCALE | ISI_CFG2_COL_SPACE_YCbCr;
                break;
+       /* YUV */
        case MEDIA_BUS_FMT_VYUY8_2X8:
                cfg2 = ISI_CFG2_YCC_SWAP_MODE_3 | ISI_CFG2_COL_SPACE_YCbCr;
                break;
@@ -126,8 +128,6 @@ static int configure_geometry(struct atmel_isi *isi, u32 width,
                cfg2 = ISI_CFG2_YCC_SWAP_DEFAULT | ISI_CFG2_COL_SPACE_YCbCr;
                break;
        /* RGB, TODO */
-       default:
-               return -EINVAL;
        }
 
        isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
@@ -138,8 +138,23 @@ static int configure_geometry(struct atmel_isi *isi, u32 width,
        cfg2 |= ((height - 1) << ISI_CFG2_IM_VSIZE_OFFSET)
                        & ISI_CFG2_IM_VSIZE_MASK;
        isi_writel(isi, ISI_CFG2, cfg2);
+}
 
-       return 0;
+static bool is_supported(struct soc_camera_device *icd,
+               const u32 pixformat)
+{
+       switch (pixformat) {
+       /* YUV, including grey */
+       case V4L2_PIX_FMT_GREY:
+       case V4L2_PIX_FMT_YUYV:
+       case V4L2_PIX_FMT_UYVY:
+       case V4L2_PIX_FMT_YVYU:
+       case V4L2_PIX_FMT_VYUY:
+               return true;
+       /* RGB, TODO */
+       default:
+               return false;
+       }
 }
 
 static irqreturn_t atmel_isi_handle_streaming(struct atmel_isi *isi)
@@ -390,10 +405,8 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count)
        /* Disable all interrupts */
        isi_writel(isi, ISI_INTDIS, (u32)~0UL);
 
-       ret = configure_geometry(isi, icd->user_width, icd->user_height,
+       configure_geometry(isi, icd->user_width, icd->user_height,
                                icd->current_fmt->code);
-       if (ret < 0)
-               return ret;
 
        spin_lock_irq(&isi->lock);
        /* Clear any pending interrupt */
@@ -491,6 +504,10 @@ static int isi_camera_set_fmt(struct soc_camera_device *icd,
        struct v4l2_mbus_framefmt *mf = &format.format;
        int ret;
 
+       /* check with atmel-isi support format, if not support use YUYV */
+       if (!is_supported(icd, pix->pixelformat))
+               pix->pixelformat = V4L2_PIX_FMT_YUYV;
+
        xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
        if (!xlate) {
                dev_warn(icd->parent, "Format %x not found\n",
@@ -540,6 +557,10 @@ static int isi_camera_try_fmt(struct soc_camera_device *icd,
        u32 pixfmt = pix->pixelformat;
        int ret;
 
+       /* check with atmel-isi support format, if not support use YUYV */
+       if (!is_supported(icd, pix->pixelformat))
+               pix->pixelformat = V4L2_PIX_FMT_YUYV;
+
        xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
        if (pixfmt && !xlate) {
                dev_warn(icd->parent, "Format %x not found\n", pixfmt);