[PATCH 1/3] drm: bridge: Add DSI HS clock frequency limits to bridge state

[Marek Vasut]

Add the ability to pass DSI HS clock frequency constraints between
neighboring DSI bridges via struct drm_bridge_state . This way the
DSI HS clock frequency negotiation can be implemented instead of
the current ad-hoc method where each bridge attempts to guess the
neighbor HS clock frequency setting or expectation.

Signed-off-by: Marek Vasut <ma...@denx.de>
---
Cc: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Cc: Lucas Stach <l.st...@pengutronix.de>
Cc: Maxime Ripard <max...@cerno.tech>
Cc: Robert Foss <robert.f...@linaro.org>
Cc: Sam Ravnborg <s...@ravnborg.org>
---
 include/drm/drm_atomic.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index 10b1990bc1f68..eece7557933d2 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -1117,6 +1117,8 @@ struct drm_bridge_state {
         * @input_bus_cfg: input bus configuration
         */
        struct drm_bus_cfg input_bus_cfg;
+       unsigned long hs_rate_min;
+       unsigned long hs_rate_max;
 
        /**
         * @output_bus_cfg: input bus configuration
-- 
2.35.1