From 6d5750788b6fbe065c31a8e33977fc6a3dd94059 Mon Sep 17 00:00:00 2001
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From: Jeffy Chen <jeffy.chen@rock-chips.com>
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Date: Fri, 2 Apr 2021 11:23:36 +0800
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Subject: [PATCH 05/74] backend-drm: Bind Nth primary plane to Nth CRTC
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The vop2 allows primary planes to bind with random CRTC, but we need to
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use the same pair as the driver registered.
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Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
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---
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libweston/backend-drm/drm.c | 18 +++++++++++++++++-
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1 file changed, 17 insertions(+), 1 deletion(-)
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diff --git a/libweston/backend-drm/drm.c b/libweston/backend-drm/drm.c
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index 4278770..e557d41 100644
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--- a/libweston/backend-drm/drm.c
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+++ b/libweston/backend-drm/drm.c
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@@ -842,10 +842,26 @@ drm_output_find_special_plane(struct drm_backend *b, struct drm_output *output,
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enum wdrm_plane_type type)
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{
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struct drm_plane *plane;
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+ int num_primary;
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- wl_list_for_each(plane, &b->plane_list, link) {
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+ num_primary = 0;
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+ wl_list_for_each_reverse(plane, &b->plane_list, link) {
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struct drm_output *tmp;
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bool found_elsewhere = false;
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+ bool is_primary = plane->type == WDRM_PLANE_TYPE_PRIMARY;
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+
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+ if (is_primary)
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+ num_primary ++;
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+
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+ /**
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+ * HACK: Assuming Nth primary plane (or cursor) is the primary
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+ * plane for the Nth crtc.
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+ * See:
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+ * https://lore.kernel.org/dri-devel/20200807090706.GA2352366@phenom.ffwll.local/
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+ */
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+ if (type == WDRM_PLANE_TYPE_PRIMARY &&
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+ num_primary - 1 != output->crtc->pipe)
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+ continue;
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if (plane->type != type)
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continue;
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--
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2.20.1
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