Attachment 84479 Details for Bug 67382 – nv50 quirk

[patch] nv50 quirk

0001-drm-nv50-disp-prevent-false-output-detection-on-the-.patch (text/plain), 1.52 KB, created by Emil Velikov on 2013-08-22 22:24:54 UTC

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Creator: Emil Velikov

Created: 2013-08-22 22:24:54 UTC

Size: 1.52 KB

patch

obsolete

>From b517694b399946815a558e7b71be67b86fa8fa14 Mon Sep 17 00:00:00 2001
>From: Emil Velikov <emil.l.velikov@gmail.com>
>Date: Thu, 22 Aug 2013 23:00:06 +0100
>Subject: [PATCH] drm/nv50/disp: prevent false output detection on the original
> nv50
>
>Commit ea9197cc323839ef3d5280c0453b2c622caa6bc7 effectively enabled the
>use of an improved DAC detection code, but introduced a regression on
>the original nv50 chipset, causing a ghost monitor to be detected.
>
>Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=67382
>Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
>---
> drivers/gpu/drm/nouveau/core/engine/disp/dacnv50.c | 9 ++++++++-
> 1 file changed, 8 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/nouveau/core/engine/disp/dacnv50.c b/drivers/gpu/drm/nouveau/core/engine/disp/dacnv50.c
>index f02fd9f..15df527 100644
>--- a/drivers/gpu/drm/nouveau/core/engine/disp/dacnv50.c
>+++ b/drivers/gpu/drm/nouveau/core/engine/disp/dacnv50.c
>@@ -55,7 +55,14 @@ nv50_dac_sense(struct nv50_disp_priv *priv, int or, u32 loadval)
> 	nv_wr32(priv, 0x61a00c + doff, 0x00100000 | loadval);
> 	mdelay(9);
> 	udelay(500);
>-	nv_wr32(priv, 0x61a00c + doff, 0x80000000);
>+
>+	/*
>+	 * The original nv50 detects a ghost monitor if we do the following
>+	 * write. See fdo#67382 for more information
>+	 */
>+	if (nv_device(priv)->chipset != 0x50)
>+		nv_wr32(priv, 0x61a00c + doff, 0x80000000);
>+
> 	load = (nv_rd32(priv, 0x61a00c + doff) & 0x38000000) >> 27;
> 	nv_wr32(priv, 0x61a00c + doff, 0x00000000);
> 	nv_mask(priv, 0x61a004 + doff, 0x807f0000, 0x80550000);
>-- 
>1.8.3.4
>

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Attachments on bug 67382: 83073 | 83074 | 83155 | 83228 | 83231 | 83240 | 83307 | 83320 | 83335 | 83378 | 83466 | 83477 | 83478 | 83549 | 83558 | 84479

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