[media] cafe_ccic: fix colorspace corruption on resume

If you suspend and resume during video capture, the video colours
are corrupted on resume. This is because the sensor is being unconditionally
powered off during the resume path.

Only power down during resume if the camera is not in use, and correctly
reconfigure the sensor during resume.
Fixes http://dev.laptop.org/ticket/10190

Signed-off-by: Daniel Drake <dsd@laptop.org>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/cafe_ccic.c b/drivers/media/video/cafe_ccic.c
index 0dfff50..789087c 100644 (file)
--- a/drivers/media/video/cafe_ccic.c
+++ b/drivers/media/video/cafe_ccic.c
@@ -859,8 +859,6 @@ static int cafe_cam_configure(struct cafe_camera *cam)
        struct v4l2_mbus_framefmt mbus_fmt;
        int ret;
 
-       if (cam->state != S_IDLE)
-               return -EINVAL;
        v4l2_fill_mbus_format(&mbus_fmt, &cam->pix_format, cam->mbus_code);
        ret = sensor_call(cam, core, init, 0);
        if (ret == 0)
@@ -2196,12 +2194,13 @@ static int cafe_pci_resume(struct pci_dev *pdev)
                return ret;
        }
        cafe_ctlr_init(cam);
-       cafe_ctlr_power_down(cam);
 
        mutex_lock(&cam->s_mutex);
        if (cam->users > 0) {
                cafe_ctlr_power_up(cam);
                __cafe_cam_reset(cam);
+       } else {
+               cafe_ctlr_power_down(cam);
        }
        mutex_unlock(&cam->s_mutex);