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From: Archit Taneja <architt@codeaurora.org>
To: robdclark@gmail.com
Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
	Archit Taneja <architt@codeaurora.org>,
	Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Subject: [PATCH] drm/msm/dsi: Set msm_dsi->encoders before initializing bridge
Date: Wed, 11 Jan 2017 12:09:51 +0530	[thread overview]
Message-ID: <1484116791-20523-1-git-send-email-architt@codeaurora.org> (raw)

The commit "drm: bridge: Link encoder and bridge in core code" updated
the drm_bridge_attach() API to also include the drm_encoder pointer
the bridge attaches to.

The func msm_dsi_manager_bridge_init() now relies on the drm_encoder
pointer stored in msm_dsi->encoders to pass the encoder to the bridge
API.

msm_dsi->encoders is unfortunately set after this function is called,
resulting in us passing a NULL pointer to drm_brigde_attach. This
results in an error and the DSI driver probe fails.

Move the initialization of msm_dsi->encoders[] a bit up. Also, don't
try to set the encoder's bridge. That's now managed by the bridge
API.

Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/msm/dsi/dsi.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c
index ec572f8..9593238 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.c
+++ b/drivers/gpu/drm/msm/dsi/dsi.c
@@ -205,6 +205,9 @@ int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
 		goto fail;
 	}
 
+	for (i = 0; i < MSM_DSI_ENCODER_NUM; i++)
+		msm_dsi->encoders[i] = encoders[i];
+
 	msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id);
 	if (IS_ERR(msm_dsi->bridge)) {
 		ret = PTR_ERR(msm_dsi->bridge);
@@ -213,11 +216,6 @@ int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
 		goto fail;
 	}
 
-	for (i = 0; i < MSM_DSI_ENCODER_NUM; i++) {
-		encoders[i]->bridge = msm_dsi->bridge;
-		msm_dsi->encoders[i] = encoders[i];
-	}
-
 	/*
 	 * check if the dsi encoder output is connected to a panel or an
 	 * external bridge. We create a connector only if we're connected to a
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation

             reply	other threads:[~2017-01-11  6:39 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-11  6:39 Archit Taneja [this message]
2017-01-11 11:14 ` [PATCH] drm/msm/dsi: Set msm_dsi->encoders before initializing bridge Laurent Pinchart

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