linux-kernel - [PATCH] media: nuvoton: npcm-video: Prevent returning unsupported resolutions

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Message-Id: <20250305084517.1301054-1-zhang971090220@gmail.com>
Date: Wed,  5 Mar 2025 16:45:17 +0800
From: Michael Chang <zhang971090220@...il.com>
To: kwliu@...oton.com,
	kflin@...oton.com,
	mchehab@...nel.org,
	zhang971090220@...il.com
Cc: linux-media@...r.kernel.org,
	openbmc@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] media: nuvoton: npcm-video: Prevent returning unsupported resolutions

To restrict the returned resolution due to Nuvoton SoC hardware
limitations.

Signed-off-by: Michael Chang <zhang971090220@...il.com>
---
 drivers/media/platform/nuvoton/npcm-video.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/nuvoton/npcm-video.c b/drivers/media/platform/nuvoton/npcm-video.c
index 234fdec04f74..8d6d51a674a3 100644
--- a/drivers/media/platform/nuvoton/npcm-video.c
+++ b/drivers/media/platform/nuvoton/npcm-video.c
@@ -578,7 +578,7 @@ static unsigned int npcm_video_hres(struct npcm_video *video)
 	regmap_read(gfxi, HVCNTL, &hvcntl);
 	apb_hor_res = (((hvcnth & HVCNTH_MASK) << 8) + (hvcntl & HVCNTL_MASK) + 1);
 
-	return apb_hor_res;
+	return (apb_hor_res > MAX_WIDTH) ? MAX_WIDTH : apb_hor_res;
 }
 
 static unsigned int npcm_video_vres(struct npcm_video *video)
@@ -591,7 +591,7 @@ static unsigned int npcm_video_vres(struct npcm_video *video)
 
 	apb_ver_res = (((vvcnth & VVCNTH_MASK) << 8) + (vvcntl & VVCNTL_MASK));
 
-	return apb_ver_res;
+	return (apb_ver_res > MAX_HEIGHT) ? MAX_HEIGHT : apb_ver_res;
 }
 
 static int npcm_video_capres(struct npcm_video *video, unsigned int hor_res,
-- 
2.34.1