Attachment 144950 Details for Bug 102646 – Patch to fix the problem

[patch] Patch to fix the problem

0001-drm-amd-powerplay-enforce-minimal-VBITimeout.patch (text/plain), 1.17 KB, created by Ahzo on 2019-08-05 22:11:01 UTC

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Creator: Ahzo

Created: 2019-08-05 22:11:01 UTC

Size: 1.17 KB

patch

obsolete

>From dc63fd16a8d02de574bd2b76348081f7c50d5442 Mon Sep 17 00:00:00 2001
>From: Ahzo <Ahzo@tutanota.com>
>Date: Mon, 5 Aug 2019 21:14:18 +0200
>Subject: [PATCH] drm/amd/powerplay: enforce minimal VBITimeout
>
>This fixes screen corruption/flickering on 75 Hz displays.
>
>Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102646
>Signed-off-by: Ahzo <Ahzo@tutanota.com>
>---
> drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
>diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
>index 487aeee1cf8a..99ee58d0d528 100644
>--- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
>+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
>@@ -4068,6 +4068,11 @@ static int smu7_program_display_gap(struct pp_hwmgr *hwmgr)
> 
> 	data->frame_time_x2 = frame_time_in_us * 2 / 100;
> 
>+	if (data->frame_time_x2 < 280) {
>+		pr_info("%s: enforce minimal VBITimeout: %d -> 280\n", __func__, data->frame_time_x2);
>+		data->frame_time_x2 = 280;
>+	}
>+
> 	display_gap2 = pre_vbi_time_in_us * (ref_clock / 100);
> 
> 	cgs_write_ind_register(hwmgr->device, CGS_IND_REG__SMC, ixCG_DISPLAY_GAP_CNTL2, display_gap2);
>-- 
>2.20.1
>

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Attachments on bug 102646: 134180 | 134181 | 134182 | 134285 | 137789 | 142539 | 142662 | 142924 | 144237 | 144238 | 144253 | 144565 | 144950 | 144951

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