linux-kernel - [PATCH] drm/amd/display: fix cond_no

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Date:   Fri, 12 Nov 2021 06:16:51 +0000
From:   cgel.zte@...il.com
To:     harry.wentland@....com
Cc:     sunpeng.li@....com, Rodrigo.Siqueira@....com,
        alexander.deucher@....com, christian.koenig@....com,
        Xinhui.Pan@....com, airlied@...ux.ie, daniel@...ll.ch,
        Jun.Lei@....com, mario.kleiner.de@...il.com, Jimmy.Kizito@....com,
        aric.cyr@....com, nicholas.kazlauskas@....com,
        vladimir.stempen@....com, Dmytro.Laktyushkin@....com,
        Jerry.Zuo@....com, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Ye Guojin <ye.guojin@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH] drm/amd/display: fix cond_no_effect.cocci warnings

From: Ye Guojin <ye.guojin@....com.cn>

This was found by coccicheck:
./drivers/gpu/drm/amd/display/dc/core/dc_resource.c, 2516, 7-9, WARNING
possible condition with no effect (if == else)

hdmi_info.bits.YQ0_YQ1 is always YYC_QUANTIZATION_LIMITED_RANGE.

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Ye Guojin <ye.guojin@....com.cn>
---
 drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index fabe1b83bd4f..564163a85d2c 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -2509,17 +2509,7 @@ static void set_avi_info_frame(
 
 	/* TODO : We should handle YCC quantization */
 	/* but we do not have matrix calculation */
-	if (stream->qy_bit == 1) {
-		if (color_space == COLOR_SPACE_SRGB ||
-			color_space == COLOR_SPACE_2020_RGB_FULLRANGE)
-			hdmi_info.bits.YQ0_YQ1 = YYC_QUANTIZATION_LIMITED_RANGE;
-		else if (color_space == COLOR_SPACE_SRGB_LIMITED ||
-					color_space == COLOR_SPACE_2020_RGB_LIMITEDRANGE)
-			hdmi_info.bits.YQ0_YQ1 = YYC_QUANTIZATION_LIMITED_RANGE;
-		else
-			hdmi_info.bits.YQ0_YQ1 = YYC_QUANTIZATION_LIMITED_RANGE;
-	} else
-		hdmi_info.bits.YQ0_YQ1 = YYC_QUANTIZATION_LIMITED_RANGE;
+	hdmi_info.bits.YQ0_YQ1 = YYC_QUANTIZATION_LIMITED_RANGE;
 
 	///VIC
 	format = stream->timing.timing_3d_format;
-- 
2.25.1