linux-kernel - [PATCH v3 09/14] drm/sun4i: Allow VI layers to be primary planes

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Date:   Sun, 24 Apr 2022 11:26:27 -0500
From:   Samuel Holland <samuel@...lland.org>
To:     Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Maxime Ripard <mripard@...nel.org>
Cc:     Samuel Holland <samuel@...lland.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...ts.linux.dev
Subject: [PATCH v3 09/14] drm/sun4i: Allow VI layers to be primary planes

D1's mixer 1 has no UI layers, only a single VI layer. That means the
mixer can only be used if the primary plane comes from this VI layer.
Add the code to handle this case.

Signed-off-by: Samuel Holland <samuel@...lland.org>
---

(no changes since v2)

Changes in v2:
 - Use Jernej's patches for mixer mode setting.

 drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
index bb7c43036dfa..f7d0b082d634 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
@@ -542,6 +542,7 @@ struct sun8i_vi_layer *sun8i_vi_layer_init_one(struct drm_device *drm,
 					       struct sun8i_mixer *mixer,
 					       int index)
 {
+	enum drm_plane_type type = DRM_PLANE_TYPE_OVERLAY;
 	u32 supported_encodings, supported_ranges;
 	unsigned int plane_cnt, format_count;
 	struct sun8i_vi_layer *layer;
@@ -560,12 +561,15 @@ struct sun8i_vi_layer *sun8i_vi_layer_init_one(struct drm_device *drm,
 		format_count = ARRAY_SIZE(sun8i_vi_layer_formats);
 	}
 
+	if (!mixer->cfg->ui_num && index == 0)
+		type = DRM_PLANE_TYPE_PRIMARY;
+
 	/* possible crtcs are set later */
 	ret = drm_universal_plane_init(drm, &layer->plane, 0,
 				       &sun8i_vi_layer_funcs,
 				       formats, format_count,
 				       sun8i_layer_modifiers,
-				       DRM_PLANE_TYPE_OVERLAY, NULL);
+				       type, NULL);
 	if (ret) {
 		dev_err(drm->dev, "Couldn't initialize layer\n");
 		return ERR_PTR(ret);
-- 
2.35.1