Attachment 143011 Details for Bug 108464 – [PATCH] drm/amd/display: Limit number of links to num_ddc

[patch] [PATCH] drm/amd/display: Limit number of links to num_ddc

0001-drm-amd-display-Limit-number-of-links-to-num_ddc.patch (text/plain), 1.14 KB, created by Harry Wentland on 2019-01-08 14:01:18 UTC

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Creator: Harry Wentland

Created: 2019-01-08 14:01:18 UTC

Size: 1.14 KB

patch

obsolete

>From 1f5fda8329d15db15249bcb850f1d72506bc4abf Mon Sep 17 00:00:00 2001
>From: Harry Wentland <harry.wentland@amd.com>
>Date: Fri, 21 Dec 2018 11:02:29 -0500
>Subject: [PATCH] drm/amd/display: Limit number of links to num_ddc
>
>[Why]
>If BIOS reports more connectors than the number of DDC lines we allocate
>for an ASIC we'll create too many AUX devices in blow up in
>dc_link_aux_transfer due to lack of a DDC line.
>
>[How]
>Limit number of links to num_ddc.
>
>Signed-off-by: Harry Wentland <harry.wentland@amd.com>
>---
> drivers/gpu/drm/amd/display/dc/core/dc.c | 3 +++
> 1 file changed, 3 insertions(+)
>
>diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
>index 9045e6fa0780..09ec1245f8c2 100644
>--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
>+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
>@@ -90,6 +90,9 @@ static bool create_links(
> 
> 	connectors_num = bios->funcs->get_connectors_number(bios);
> 
>+	if (connectors_num > dc->res_pool->res_cap->num_ddc)
>+		connectors_num = dc->res_pool->res_cap->num_ddc;
>+
> 	if (connectors_num > ENUM_ID_COUNT) {
> 		dm_error(
> 			"DC: Number of connectors %d exceeds maximum of %d!\n",
>-- 
>2.19.1
>

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