[media] atmel-isi: code cleanup

Ensure that ISI is clocked before starting sensor sub device.
Remove un-needed type check in try_fmt().
Use clamp() macro for hardware capabilities.
Fix wrong tabulation to space.

Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/platform/atmel/atmel-isi.c b/drivers/media/platform/atmel/atmel-isi.c
index ef482cc..891fa25 100644 (file)
--- a/drivers/media/platform/atmel/atmel-isi.c
+++ b/drivers/media/platform/atmel/atmel-isi.c
@@ -37,8 +37,8 @@
 
 #include "atmel-isi.h"
 
-#define MAX_SUPPORT_WIDTH              2048
-#define MAX_SUPPORT_HEIGHT             2048
+#define MAX_SUPPORT_WIDTH              2048U
+#define MAX_SUPPORT_HEIGHT             2048U
 #define MIN_FRAME_RATE                 15
 #define FRAME_INTERVAL_MILLI_SEC       (1000 / MIN_FRAME_RATE)
 
@@ -425,6 +425,8 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count)
        struct frame_buffer *buf, *node;
        int ret;
 
+       pm_runtime_get_sync(isi->dev);
+
        /* Enable stream on the sub device */
        ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 1);
        if (ret && ret != -ENOIOCTLCMD) {
@@ -432,8 +434,6 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count)
                goto err_start_stream;
        }
 
-       pm_runtime_get_sync(isi->dev);
-
        /* Reset ISI */
        ret = atmel_isi_wait_status(isi, WAIT_ISI_RESET);
        if (ret < 0) {
@@ -456,10 +456,11 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count)
        return 0;
 
 err_reset:
-       pm_runtime_put(isi->dev);
        v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0);
 
 err_start_stream:
+       pm_runtime_put(isi->dev);
+
        spin_lock_irq(&isi->irqlock);
        isi->active = NULL;
        /* Release all active buffers */
@@ -567,20 +568,15 @@ static int isi_try_fmt(struct atmel_isi *isi, struct v4l2_format *f,
        };
        int ret;
 
-       if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
-               return -EINVAL;
-
        isi_fmt = find_format_by_fourcc(isi, pixfmt->pixelformat);
        if (!isi_fmt) {
                isi_fmt = isi->user_formats[isi->num_user_formats - 1];
                pixfmt->pixelformat = isi_fmt->fourcc;
        }
 
-       /* Limit to Atmel ISC hardware capabilities */
-       if (pixfmt->width > MAX_SUPPORT_WIDTH)
-               pixfmt->width = MAX_SUPPORT_WIDTH;
-       if (pixfmt->height > MAX_SUPPORT_HEIGHT)
-               pixfmt->height = MAX_SUPPORT_HEIGHT;
+       /* Limit to Atmel ISI hardware capabilities */
+       pixfmt->width = clamp(pixfmt->width, 0U, MAX_SUPPORT_WIDTH);
+       pixfmt->height = clamp(pixfmt->height, 0U, MAX_SUPPORT_HEIGHT);
 
        v4l2_fill_mbus_format(&format.format, pixfmt, isi_fmt->mbus_code);
        ret = v4l2_subdev_call(isi->entity.subdev, pad, set_fmt,
@@ -1059,7 +1055,7 @@ static int isi_graph_notify_complete(struct v4l2_async_notifier *notifier)
        struct atmel_isi *isi = notifier_to_isi(notifier);
        int ret;
 
-       isi->vdev->ctrl_handler = isi->entity.subdev->ctrl_handler;
+       isi->vdev->ctrl_handler = isi->entity.subdev->ctrl_handler;
        ret = isi_formats_init(isi);
        if (ret) {
                dev_err(isi->dev, "No supported mediabus format found\n");