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From: Tony Lindgren <tony@atomide.com>
To: Tomi Valkeinen <tomi.valkeinen@ti.com>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Sebastian Reichel <sre@kernel.org>
Cc: Merlijn Wajer <merlijn@wizzup.org>,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>,
	ruleh <ruleh@gmx.de>,
	dri-devel@lists.freedesktop.org, linux-omap@vger.kernel.org
Subject: [RFC] drm/omap: Create only one primary plane for CRTC
Date: Fri, 28 Feb 2020 12:05:34 -0800	[thread overview]
Message-ID: <20200228200534.GO37466@atomide.com> (raw)

Hi,

Looks like sway and wlroots won't work with omaprdrm because of
the following error:

backend/drm/drm.c:86: add_plane: Assertion
!(type == DRM_PLANE_TYPE_PRIMARY &&  crtc->primary)

Looks like there should only be one primary plane per CRTC?

There's some discussion about that for a wlroots bug at:

https://github.com/swaywm/wlroots/issues/1943

And there's a link pointing to the kms docs:

https://01.org/linuxgraphics/gfx-docs/drm/gpu/drm-kms.html#plane-abstraction

Below is a quick hack fix I used to get sway started.

Not sure how the primary plane should be picked? I just
used 0 as the primary plane to get things working :)

I can start xterm on sway, but so far no fonts only the
borders.

Regards,

Tony

8< ----------------------
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index d2750f60f519..122f8c4cf45b 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -268,7 +268,7 @@ static int omap_modeset_init(struct drm_device *dev)
 	plane_crtc_mask = (1 << priv->num_pipes) - 1;
 
 	for (i = 0; i < num_ovls; i++) {
-		enum drm_plane_type type = i < priv->num_pipes
+		enum drm_plane_type type = i == 0
 					 ? DRM_PLANE_TYPE_PRIMARY
 					 : DRM_PLANE_TYPE_OVERLAY;
 		struct drm_plane *plane;
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                 reply	other threads:[~2020-02-29 10:14 UTC|newest]

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