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authorMarek Vasut <marex@denx.de>2022-05-24 03:05:12 +0200
committerMarek Vasut <marex@denx.de>2022-06-12 12:22:22 +0200
commitfc801750b197d0f00c09e01e59a7dcd240fddcb5 (patch)
tree8ae8a55ca50bc4623f35973415faec5717fa58d7 /include/drm
parent7d188c521d9ec3650136e9b9c81c61b22a544ab3 (diff)
drm: of: Add drm_of_get_data_lanes_count and drm_of_get_data_lanes_ep
Add helper function to count and sanitize DT "data-lanes" property and return either error or the data-lanes count. This is useful for both DSI and (e)DP "data-lanes" property. The later version of the function is an extra wrapper which handles the endpoint look up by regs, that's what majority of the drivers duplicate too, but not all of them. Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com> Signed-off-by: Marek Vasut <marex@denx.de> Cc: Andrzej Hajda <andrzej.hajda@intel.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Maxime Ripard <maxime@cerno.tech> Cc: Robert Foss <robert.foss@linaro.org> Cc: Sam Ravnborg <sam@ravnborg.org> To: dri-devel@lists.freedesktop.org Link: https://patchwork.freedesktop.org/patch/msgid/20220524010522.528569-1-marex@denx.de
Diffstat (limited to 'include/drm')
-rw-r--r--include/drm/drm_of.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/include/drm/drm_of.h b/include/drm/drm_of.h
index 99f79ac8b4cd..92387eabcb6f 100644
--- a/include/drm/drm_of.h
+++ b/include/drm/drm_of.h
@@ -50,6 +50,12 @@ int drm_of_find_panel_or_bridge(const struct device_node *np,
int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1,
const struct device_node *port2);
int drm_of_lvds_get_data_mapping(const struct device_node *port);
+int drm_of_get_data_lanes_count(const struct device_node *endpoint,
+ const unsigned int min, const unsigned int max);
+int drm_of_get_data_lanes_count_ep(const struct device_node *port,
+ int port_reg, int reg,
+ const unsigned int min,
+ const unsigned int max);
#else
static inline uint32_t drm_of_crtc_port_mask(struct drm_device *dev,
struct device_node *port)
@@ -105,6 +111,20 @@ drm_of_lvds_get_data_mapping(const struct device_node *port)
{
return -EINVAL;
}
+
+int drm_of_get_data_lanes_count(const struct device_node *endpoint,
+ const unsigned int min, const unsigned int max)
+{
+ return -EINVAL;
+}
+
+int drm_of_get_data_lanes_count_ep(const struct device_node *port,
+ int port_reg, int reg
+ const unsigned int min,
+ const unsigned int max)
+{
+ return -EINVAL;
+}
#endif
/*