linux-kernel - [PATCH 5.10 06/83] drm/nouveau/kms/tu102-: delay enabling cursor until after assign

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Date:   Mon, 11 Oct 2021 15:45:26 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ben Skeggs <bskeggs@...hat.com>,
        Lyude Paul <lyude@...hat.com>,
        Karol Herbst <kherbst@...hat.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
Subject: [PATCH 5.10 06/83] drm/nouveau/kms/tu102-: delay enabling cursor until after assign_windows

From: Ben Skeggs <bskeggs@...hat.com>

commit f732e2e34aa08493fdd762f3daa4e5f16bbf1e45 upstream.

Prevent NVD core channel error code 67 occuring and hanging display,
managed to reproduce on GA102 while testing suspend/resume scenarios.

Required extension of earlier commit to fix interactions with EFI.

Fixes: e78b1b545c6c ("drm/nouveau/kms/nv50: workaround EFI GOP window channel format differences")
Signed-off-by: Ben Skeggs <bskeggs@...hat.com>
Cc: Lyude Paul <lyude@...hat.com>
Cc: Karol Herbst <kherbst@...hat.com>
Cc: <stable@...r.kernel.org> # v5.12+
Reviewed-by: Karol Herbst <kherbst@...hat.com>
Signed-off-by: Karol Herbst <kherbst@...hat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210906005628.11499-2-skeggsb@gmail.com
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/nouveau/dispnv50/head.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/nouveau/dispnv50/head.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/head.c
@@ -51,6 +51,7 @@ nv50_head_flush_clr(struct nv50_head *he
 void
 nv50_head_flush_set_wndw(struct nv50_head *head, struct nv50_head_atom *asyh)
 {
+	if (asyh->set.curs   ) head->func->curs_set(head, asyh);
 	if (asyh->set.olut   ) {
 		asyh->olut.offset = nv50_lut_load(&head->olut,
 						  asyh->olut.buffer,
@@ -66,7 +67,6 @@ nv50_head_flush_set(struct nv50_head *he
 	if (asyh->set.view   ) head->func->view    (head, asyh);
 	if (asyh->set.mode   ) head->func->mode    (head, asyh);
 	if (asyh->set.core   ) head->func->core_set(head, asyh);
-	if (asyh->set.curs   ) head->func->curs_set(head, asyh);
 	if (asyh->set.base   ) head->func->base    (head, asyh);
 	if (asyh->set.ovly   ) head->func->ovly    (head, asyh);
 	if (asyh->set.dither ) head->func->dither  (head, asyh);