From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753696AbdJGWr0 (ORCPT ); Sat, 7 Oct 2017 18:47:26 -0400 Received: from fldsmtpe03.verizon.com ([140.108.26.142]:56998 "EHLO fldsmtpe03.verizon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753523AbdJGWiW (ORCPT ); Sat, 7 Oct 2017 18:38:22 -0400 From: "Levin, Alexander (Sasha Levin)" Cc: Archit Taneja , Laurent Pinchart , Rob Clark , "Levin, Alexander (Sasha Levin)" X-Host: mariner.tdc.vzwcorp.com To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" Subject: [PATCH review for 4.9 27/50] drm/msm/dsi: Set msm_dsi->encoders before initializing bridge Thread-Topic: [PATCH review for 4.9 27/50] drm/msm/dsi: Set msm_dsi->encoders before initializing bridge Thread-Index: AQHTP7zFf3mIn1+Lsk+edPif/mzU6g== Date: Sat, 7 Oct 2017 22:36:52 +0000 Message-ID: <20171007223636.24797-27-alexander.levin@verizon.com> References: <20171007223636.24797-1-alexander.levin@verizon.com> In-Reply-To: <20171007223636.24797-1-alexander.levin@verizon.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.144.60.250] Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by nfs id v97MliB6029763 From: Archit Taneja [ Upstream commit 0bb70b82c2f91e4667f3c617505235efd6d77e46 ] 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 Reviewed-by: Laurent Pinchart Signed-off-by: Archit Taneja Signed-off-by: Rob Clark Signed-off-by: Sasha Levin --- 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 ec572f8389ed..9593238ccc1b 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 -- 2.11.0