Hi,
On Sat, May 26, 2018 at 08:24:46PM +0300, Laurent Pinchart wrote:
> Despite its name, the omap_dss_get_next_device() function operates on
> display devices only. Make it more generic by allowing operation on all
> devices, with a parameter to specify the device type.
>
> While at it rename the function to omapdss_device_get_next() to match
> the naming of the other functions operating on struct omap_dss_device.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> ---
Reviewed-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxxxx>
-- Sebastian
> drivers/gpu/drm/omapdrm/dss/base.c | 52 +++++++++++++++++++++++++++++++++++
> drivers/gpu/drm/omapdrm/dss/display.c | 49 ---------------------------------
> drivers/gpu/drm/omapdrm/dss/omapdss.h | 6 ++--
> 3 files changed, 56 insertions(+), 51 deletions(-)
>
> diff --git a/drivers/gpu/drm/omapdrm/dss/base.c b/drivers/gpu/drm/omapdrm/dss/base.c
> index 7cd3076c2140..f7b8958f15bc 100644
> --- a/drivers/gpu/drm/omapdrm/dss/base.c
> +++ b/drivers/gpu/drm/omapdrm/dss/base.c
> @@ -104,6 +104,58 @@ struct omap_dss_device *omapdss_find_device_by_port(struct device_node *src,
> return NULL;
> }
>
> +/*
> + * Search for the next device starting at @from. If display_only is true, skip
> + * non-display devices. Release the reference to the @from device, and acquire
> + * a reference to the returned device if found.
> + */
> +struct omap_dss_device *omapdss_device_get_next(struct omap_dss_device *from,
> + bool display_only)
> +{
> + struct omap_dss_device *dssdev;
> + struct list_head *list;
> +
> + mutex_lock(&omapdss_devices_lock);
> +
> + if (list_empty(&omapdss_devices_list)) {
> + dssdev = NULL;
> + goto done;
> + }
> +
> + /*
> + * Start from the from entry if given or from omapdss_devices_list
> + * otherwise.
> + */
> + list = from ? &from->list : &omapdss_devices_list;
> +
> + list_for_each_entry(dssdev, list, list) {
> + /*
> + * Stop if we reach the omapdss_devices_list, that's the end of
> + * the list.
> + */
> + if (&dssdev->list == &omapdss_devices_list) {
> + dssdev = NULL;
> + goto done;
> + }
> +
> + /* Filter out non-display entries if display_only is set. */
> + if (!display_only || dssdev->driver)
> + goto done;
> + }
> +
> + dssdev = NULL;
> +
> +done:
> + if (from)
> + omap_dss_put_device(from);
> + if (dssdev)
> + omap_dss_get_device(dssdev);
> +
> + mutex_unlock(&omapdss_devices_lock);
> + return dssdev;
> +}
> +EXPORT_SYMBOL(omapdss_device_get_next);
> +
> int omapdss_device_connect(struct omap_dss_device *src,
> struct omap_dss_device *dst)
> {
> diff --git a/drivers/gpu/drm/omapdrm/dss/display.c b/drivers/gpu/drm/omapdrm/dss/display.c
> index 383512c8a466..0c94d5208398 100644
> --- a/drivers/gpu/drm/omapdrm/dss/display.c
> +++ b/drivers/gpu/drm/omapdrm/dss/display.c
> @@ -92,52 +92,3 @@ void omap_dss_put_device(struct omap_dss_device *dssdev)
> module_put(dssdev->owner);
> }
> EXPORT_SYMBOL(omap_dss_put_device);
> -
> -/*
> - * ref count of the found device is incremented.
> - * ref count of from-device is decremented.
> - */
> -struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from)
> -{
> - struct list_head *l;
> - struct omap_dss_device *dssdev;
> -
> - mutex_lock(&panel_list_mutex);
> -
> - if (list_empty(&panel_list)) {
> - dssdev = NULL;
> - goto out;
> - }
> -
> - if (from == NULL) {
> - dssdev = list_first_entry(&panel_list, struct omap_dss_device,
> - panel_list);
> - omap_dss_get_device(dssdev);
> - goto out;
> - }
> -
> - omap_dss_put_device(from);
> -
> - list_for_each(l, &panel_list) {
> - dssdev = list_entry(l, struct omap_dss_device, panel_list);
> - if (dssdev == from) {
> - if (list_is_last(l, &panel_list)) {
> - dssdev = NULL;
> - goto out;
> - }
> -
> - dssdev = list_entry(l->next, struct omap_dss_device,
> - panel_list);
> - omap_dss_get_device(dssdev);
> - goto out;
> - }
> - }
> -
> - WARN(1, "'from' dssdev not found\n");
> -
> - dssdev = NULL;
> -out:
> - mutex_unlock(&panel_list_mutex);
> - return dssdev;
> -}
> -EXPORT_SYMBOL(omap_dss_get_next_device);
> diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h
> index a6ddc881ea72..94a3f98bdd3d 100644
> --- a/drivers/gpu/drm/omapdrm/dss/omapdss.h
> +++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h
> @@ -489,11 +489,15 @@ static inline bool omapdss_is_initialized(void)
>
> int omapdss_register_display(struct omap_dss_device *dssdev);
> void omapdss_unregister_display(struct omap_dss_device *dssdev);
> +#define for_each_dss_display(d) \
> + while ((d = omapdss_device_get_next(d, true)) != NULL)
>
> void omapdss_device_register(struct omap_dss_device *dssdev);
> void omapdss_device_unregister(struct omap_dss_device *dssdev);
> struct omap_dss_device *omapdss_find_device_by_port(struct device_node *src,
> unsigned int port);
> +struct omap_dss_device *omapdss_device_get_next(struct omap_dss_device *from,
> + bool display_only);
> int omapdss_device_connect(struct omap_dss_device *src,
> struct omap_dss_device *dst);
> void omapdss_device_disconnect(struct omap_dss_device *src,
> @@ -501,8 +505,6 @@ void omapdss_device_disconnect(struct omap_dss_device *src,
>
> struct omap_dss_device *omap_dss_get_device(struct omap_dss_device *dssdev);
> void omap_dss_put_device(struct omap_dss_device *dssdev);
> -#define for_each_dss_display(d) while ((d = omap_dss_get_next_device(d)) != NULL)
> -struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from);
>
> int omap_dss_get_num_overlay_managers(void);
>
> --
> Regards,
>
> Laurent Pinchart
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
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