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From: Jayesh Choudhary <j-choudhary@ti.com>
To: <linux-kernel@vger.kernel.org>, <dmitry.baryshkov@linaro.org>,
        <sui.jingfeng@linux.dev>, <andrzej.hajda@intel.com>,
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CC: <jonas@kwiboo.se>, <jernej.skrabec@gmail.com>,
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Subject: [PATCH v5 3/3] drm/bridge: sii902x: Add pixel clock check in atomic_check
Date: Thu, 13 Jun 2024 14:08:05 +0530
Message-ID: <20240613083805.439337-4-j-choudhary@ti.com>
In-Reply-To: <20240613083805.439337-1-j-choudhary@ti.com>
References: <20240613083805.439337-1-j-choudhary@ti.com>
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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>
---
 drivers/gpu/drm/bridge/sii902x.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
index 00a8c469f553..7f91b0db161e 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.
-- 
2.25.1