linux-kernel - [PATCH 5.14 015/151] drm/amd/display: Limit display scaling to up to 4k for DCN 3.1

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Message-Id: <20211011134518.349098117@linuxfoundation.org>
Date:   Mon, 11 Oct 2021 15:44:47 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Zhan Liu <Zhan.Liu@....com>,
        Solomon Chiu <solomon.chiu@....com>,
        Nikola Cornij <nikola.cornij@....com>,
        Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 5.14 015/151] drm/amd/display: Limit display scaling to up to 4k for DCN 3.1

From: Nikola Cornij <nikola.cornij@....com>

commit a7e397b7c45377e20542146be10231b8afa948d1 upstream.

[why]
The existing limit was mistakenly bigger than 4k for DCN 3.1

Reviewed-by: Zhan Liu <Zhan.Liu@....com>
Acked-by: Solomon Chiu <solomon.chiu@....com>
Signed-off-by: Nikola Cornij <nikola.cornij@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Cc: stable@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c
@@ -928,7 +928,7 @@ static const struct dc_debug_options deb
 	.disable_dcc = DCC_ENABLE,
 	.vsr_support = true,
 	.performance_trace = false,
-	.max_downscale_src_width = 7680,/*upto 8K*/
+	.max_downscale_src_width = 3840,/*upto 4K*/
 	.disable_pplib_wm_range = false,
 	.scl_reset_length10 = true,
 	.sanity_checks = false,