linux-kernel - [PATCH] drm/mediatek: mtk_dpi: Create connector for bridges

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Message-Id: <20201203082445.1342763-1-hsinyi@chromium.org>
Date:   Thu,  3 Dec 2020 16:24:45 +0800
From:   Hsin-Yi Wang <hsinyi@...omium.org>
To:     Chun-Kuang Hu <chunkuang.hu@...nel.org>
Cc:     Philipp Zabel <p.zabel@...gutronix.de>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Matthias Brugger <matthias.bgg@...il.com>,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm/mediatek: mtk_dpi: Create connector for bridges

Similar to a9d9fea74be2 ("drm/mediatek: mtk_dsi: Create connector for bridges"):

Use the drm_bridge_connector helper to create a connector for pipelines
that use drm_bridge. This allows splitting connector operations across
multiple bridges when necessary, instead of having the last bridge in
the chain creating the connector and handling all connector operations
internally.

Signed-off-by: Hsin-Yi Wang <hsinyi@...omium.org>
---
 drivers/gpu/drm/mediatek/mtk_dpi.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index 52f11a63a330..189377e342fa 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -20,6 +20,7 @@
 
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_bridge.h>
+#include <drm/drm_bridge_connector.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_of.h>
 #include <drm/drm_simple_kms_helper.h>
@@ -66,6 +67,7 @@ struct mtk_dpi {
 	struct drm_encoder encoder;
 	struct drm_bridge bridge;
 	struct drm_bridge *next_bridge;
+	struct drm_connector *connector;
 	void __iomem *regs;
 	struct device *dev;
 	struct clk *engine_clk;
@@ -603,12 +605,21 @@ static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
 
 	dpi->encoder.possible_crtcs = mtk_drm_find_possible_crtc_by_comp(drm_dev, dpi->ddp_comp);
 
-	ret = drm_bridge_attach(&dpi->encoder, &dpi->bridge, NULL, 0);
+	ret = drm_bridge_attach(&dpi->encoder, &dpi->bridge, NULL,
+				DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 	if (ret) {
 		dev_err(dev, "Failed to attach bridge: %d\n", ret);
 		goto err_cleanup;
 	}
 
+	dpi->connector = drm_bridge_connector_init(drm_dev, &dpi->encoder);
+	if (IS_ERR(dpi->connector)) {
+		dev_err(dev, "Unable to create bridge connector\n");
+		ret = PTR_ERR(dpi->connector);
+		goto err_cleanup;
+	}
+	drm_connector_attach_encoder(dpi->connector, &dpi->encoder);
+
 	dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
 	dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
 	dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
-- 
2.29.2.576.ga3fc446d84-goog