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Subject[PATCH] drm/amd/display: Remove check for 0 kHz clock values
Date
From 09c1952466752033722b02d9c7e5532e1982f6d9 Mon Sep 17 00:00:00 2001
From: Paul Menzel <pmenzel@molgen.mpg.de>
Date: Sat, 13 Jul 2019 20:33:49 +0200

This basically reverts commit 00893681a0ff4 (drm/amd/display: Reject
PPLib clock values if they are invalid).

0 kHz values are a thing on at least the boards below.

1. MSI MS-7A37/B350M MORTAR (MS-7A37), BIOS 1.G1 05/17/2018
2. MSI B450M Mortar, 2400G on 4.19.8
3. Gigabyte Technology Co., Ltd. X470 AORUS ULTRA GAMING/X470 AORUS
ULTRA GAMING-CF, BIOS F30 04/16/2019

Asserting instead of giving a useful error message to the user, so they
can understand what is going on and how to possible fix things, might be
good for development, but is a bad user experience, so should not be on
production systems. So, remove the check for now.

Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=107296
Tested: MSI MS-7A37/B350M MORTAR (MS-7A37)
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
---
drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c | 5 -----
1 file changed, 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
index 1b4b51657f5e..edaaae5754fe 100644
--- a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
+++ b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
@@ -1362,11 +1362,6 @@ static bool verify_clock_values(struct dm_pp_clock_levels_with_voltage *clks)
if (clks->num_levels == 0)
return false;

- for (i = 0; i < clks->num_levels; i++)
- /* Ensure that the result is sane */
- if (clks->data[i].clocks_in_khz == 0)
- return false;
-
return true;
}

--
2.22.0
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