disp: msm: dsi: add check for the invalid modeset

There can be a scenario where fps change along with dynamic clock
happen in a same commit. This makes newer dynamic clock configuration
come to impact while leaving panel vblank to function as per the older
configured fps. This is invalid modeset, add validation check for the
same.

Change-Id: I32f15de5260d3abdb16a4b1c3f8eefc8bd634848
Signed-off-by: Akash Gajjar <[email protected]>

msm/dsi/dsi_drm.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2021-2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021-2024 Qualcomm Innovation Center, Inc. All rights reserved.
  * Copyright (c) 2016-2021, The Linux Foundation. All rights reserved.
  */
 
@@ -464,6 +464,14 @@ static bool _dsi_bridge_mode_validate_and_fixup(struct drm_bridge *bridge,
 			adj_mode->panel_mode_caps);
 	}
 
+	if (!dsi_display_mode_match(&cur_dsi_mode, adj_mode,
+			DSI_MODE_MATCH_ACTIVE_TIMINGS) &&
+			(adj_mode->dsi_mode_flags & DSI_MODE_FLAG_DYN_CLK)) {
+		adj_mode->dsi_mode_flags &= ~DSI_MODE_FLAG_DYN_CLK;
+		DSI_ERR("DMS and dyn clk not supported in same commit\n");
+		return false;
+	}
+
 	return rc;
 }