linux-kernel - [PATCH 5.14 050/125] drm/amd/display: Limit display scaling to up to true 4k for DCN 3.1

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Message-Id: <20211101082542.686110905@linuxfoundation.org>
Date:   Mon,  1 Nov 2021 10:17:03 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Aric Cyr <Aric.Cyr@....com>,
        Agustin Gutierrez Sanchez <agustin.gutierrez@....com>,
        Nikola Cornij <nikola.cornij@....com>,
        Daniel Wheeler <daniel.wheeler@....com>,
        Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 5.14 050/125] drm/amd/display: Limit display scaling to up to true 4k for DCN 3.1

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

commit c21b105380cf86e829c68586ca1315cfc253ad8c upstream.

[why]
The requirement is that image width up to 4096 shall be supported

Reviewed-by: Aric Cyr <Aric.Cyr@....com>
Acked-by: Agustin Gutierrez Sanchez <agustin.gutierrez@....com>
Signed-off-by: Nikola Cornij <nikola.cornij@....com>
Tested-by: Daniel Wheeler <daniel.wheeler@....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 = 3840,/*upto 4K*/
+	.max_downscale_src_width = 4096,/*upto true 4K*/
 	.disable_pplib_wm_range = false,
 	.scl_reset_length10 = true,
 	.sanity_checks = false,