linux-kernel - [PATCH v5 07/10] media: verisilicon: postproc: Fix down scale test

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Message-Id: <20230824092133.39510-8-benjamin.gaignard@collabora.com>
Date:   Thu, 24 Aug 2023 11:21:30 +0200
From:   Benjamin Gaignard <benjamin.gaignard@...labora.com>
To:     mchehab@...nel.org, tfiga@...omium.org, m.szyprowski@...sung.com,
        ming.qian@....com, ezequiel@...guardiasur.com.ar,
        p.zabel@...gutronix.de, gregkh@...uxfoundation.org,
        hverkuil-cisco@...all.nl, nicolas.dufresne@...labora.com
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
        linux-rockchip@...ts.infradead.org, linux-staging@...ts.linux.dev,
        kernel@...labora.com,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>
Subject: [PATCH v5 07/10] media: verisilicon: postproc: Fix down scale test

Do not allow down scaling if the source buffer resolution is
smaller  than destination one.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
Fixes: fbb6c848dd89 ("media: destage Hantro VPU driver")
---
Note: Marek has propose exactly the same fix in this patch:
[PATCH] media: verisilicon: Do not enable G2 postproc downscale if source is narrower than destination

 drivers/media/platform/verisilicon/hantro_postproc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/verisilicon/hantro_postproc.c b/drivers/media/platform/verisilicon/hantro_postproc.c
index e624cd98f41b..77d8ecfbe12f 100644
--- a/drivers/media/platform/verisilicon/hantro_postproc.c
+++ b/drivers/media/platform/verisilicon/hantro_postproc.c
@@ -107,7 +107,7 @@ static void hantro_postproc_g1_enable(struct hantro_ctx *ctx)
 
 static int down_scale_factor(struct hantro_ctx *ctx)
 {
-	if (ctx->src_fmt.width == ctx->dst_fmt.width)
+	if (ctx->src_fmt.width <= ctx->dst_fmt.width)
 		return 0;
 
 	return DIV_ROUND_CLOSEST(ctx->src_fmt.width, ctx->dst_fmt.width);
-- 
2.39.2