From: Jayesh Choudhary <j-choudhary@ti.com>
Date: Thu, 13 Jun 2024 08:38:05 +0000 (+0530)
Subject: drm/bridge: sii902x: Add pixel clock check in atomic_check
X-Git-Tag: v6.11-rc1~141^2~21^2~34
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9324410846e13595d453b7f34508b1f6b15fb1a7;p=thirdparty%2Fkernel%2Flinux.git

drm/bridge: sii902x: Add pixel clock check in atomic_check

Check the pixel clock for the mode in atomic_check and ensure that
it is within the range supported by the bridge.

Signed-off-by: Jayesh Choudhary <j-choudhary@ti.com>
Reviewed-by: Aradhya Bhatia <a-bhatia1@ti.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240613083805.439337-4-j-choudhary@ti.com
Signed-off-by: Maxime Ripard <mripard@kernel.org>
---

diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
index 00a8c469f5532..7f91b0db161ed 100644
--- a/drivers/gpu/drm/bridge/sii902x.c
+++ b/drivers/gpu/drm/bridge/sii902x.c
@@ -496,6 +496,10 @@ static int sii902x_bridge_atomic_check(struct drm_bridge *bridge,
 				       struct drm_crtc_state *crtc_state,
 				       struct drm_connector_state *conn_state)
 {
+	if (crtc_state->mode.clock < SII902X_MIN_PIXEL_CLOCK_KHZ ||
+	    crtc_state->mode.clock > SII902X_MAX_PIXEL_CLOCK_KHZ)
+		return -EINVAL;
+
 	/*
 	 * There might be flags negotiation supported in future but
 	 * set the bus flags in atomic_check statically for now.