Hi,
On Sat, May 26, 2018 at 08:25:10PM +0300, Laurent Pinchart wrote:
> When a DSS output is (dis)connected the omapdss_output_(un)set_device()
> function performs a sanity check to ensure that the output isn't already
> (dis)connected. The check is unnecessary as those situations should
> never happen, but can nonetheless be useful to catch driver bugs. To
> prepare for removal of the omapdss_output_(un)set_device() functions
> move the connection check to the omapdss_device_connect() function. The
> omapdss_device_disconnect() already contains a corresponding check.
>
> Signed-off-by: Laurent Pinchart
> ---
Reviewed-by: Sebastian Reichel
-- Sebastian
> drivers/gpu/drm/omapdrm/dss/base.c | 1 +
> drivers/gpu/drm/omapdrm/dss/output.c | 29 ++---
> 2 files changed, 3 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/gpu/drm/omapdrm/dss/base.c
> b/drivers/gpu/drm/omapdrm/dss/base.c
> index 7f41c541397b..3afb3d574a7b 100644
> --- a/drivers/gpu/drm/omapdrm/dss/base.c
> +++ b/drivers/gpu/drm/omapdrm/dss/base.c
> @@ -209,6 +209,7 @@ int omapdss_device_connect(struct dss_device *dss,
> }
>
> if (src) {
> + WARN_ON(src->dst);
> dst->src = src;
> src->dst = dst;
> }
> diff --git a/drivers/gpu/drm/omapdrm/dss/output.c
> b/drivers/gpu/drm/omapdrm/dss/output.c
> index 2f7a019d059e..96d74218cf91 100644
> --- a/drivers/gpu/drm/omapdrm/dss/output.c
> +++ b/drivers/gpu/drm/omapdrm/dss/output.c
> @@ -29,61 +29,36 @@ static DEFINE_MUTEX(output_lock);
> int omapdss_output_set_device(struct omap_dss_device *out,
> struct omap_dss_device *dssdev)
> {
> - int r;
> + int r = 0;
>
> mutex_lock(&output_lock);
>
> - if (out->dst) {
> - dev_err(out->dev,
> - "output already has device %s connected to it\n",
> - out->dst->name);
> - r = -EINVAL;
> - goto err;
> - }
> -
> if (out->output_type != dssdev->type) {
> dev_err(out->dev, "output type and display type don't match\n");
> r = -EINVAL;
> - goto err;
> }
>
> mutex_unlock(&output_lock);
>
> - return 0;
> -err:
> - mutex_unlock(&output_lock);
> -
> return r;
> }
> EXPORT_SYMBOL(omapdss_output_set_device);
>
> int omapdss_output_unset_device(struct omap_dss_device *out)
> {
> - int r;
> + int r = 0;
>
> mutex_lock(&output_lock);
>
> - if (!out->dst) {
> - dev_err(out->dev,
> - "output doesn't have a device connected to it\n");
> - r = -EINVAL;
> - goto err;
> - }
> -
> if (out->dst->state != OMAP_DSS_DISPLAY_DISABLED) {
> dev_err(out->dev,
> "device %s is not disabled, cannot unset device\n",
> out->dst->name);
> r = -EINVAL;
> - goto err;
> }
>
> mutex_unlock(&output_lock);
>
> - return 0;
> -err:
> - mutex_unlock(&output_lock);
> -
> return r;
> }
> EXPORT_SYMBOL(omapdss_output_unset_device);
> --
> Regards,
>
> Laurent Pinchart
>
> ___
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> dri-devel@lists.freedesktop.org
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