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AJvYcCU9aajz6HYX/8uv6oUNrhaOgKcUu1uSitPmM9ddEMf6HRGgD4rZptAWFGiDKtGcrZMJTqKJY/o8qQz2K3gdoxwP@lists.infradead.org X-Gm-Message-State: AOJu0Ywe8Fp6vgDEl2U7M3opC3wh2SLJ17wDdC2l8Iie+5BfqFqbED03 RLV+0YM8Rbdyd2t82iJ4bavcs3yGGXj9/fnYGdhXiAAnUi5X3Q67NST5EDkNkKmqZps2uFvw2IN xlkAZSMnTjlwAPA== X-Google-Smtp-Source: AGHT+IGtw++CFsHM6UsXTaa07P8s7oTXdItvei/TRQB3GwOD9DmownHZlFBOwrDDCuKJGIw70cl6vC5daxpXLbk= X-Received: from saravanak.san.corp.google.com ([2620:15c:2d:3:965e:f81d:c9fb:b352]) (user=saravanak job=sendgmr) by 2002:a5b:602:0:b0:e28:f2a5:f1d with SMTP id 3f1490d57ef6-e2e3a632bffmr3981276.4.1729710824576; Wed, 23 Oct 2024 12:13:44 -0700 (PDT) Date: Wed, 23 Oct 2024 12:13:36 -0700 Message-Id: <20241023191339.1491282-1-saravanak@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.47.0.105.g07ac214952-goog Subject: [PATCH] drm: display: Set fwnode for aux bus devices From: Saravana Kannan To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Matthias Brugger , AngeloGioacchino Del Regno Cc: Saravana Kannan , " =?utf-8?b?TsOtY29sYXMgRi4g?= =?utf-8?b?Ui4gQS4gUHJhZG8=?= " , Jon Hunter , kernel-team@android.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241023_121346_186783_955DE4EE X-CRM114-Status: GOOD ( 12.57 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org fwnode needs to be set for a device for fw_devlink to be able to track/enforce its dependencies correctly. Without this, you'll see error messages like this when the supplier has probed and tries to make sure all its fwnode consumers are linked to it using device links: mediatek-drm-dp 1c500000.edp-tx: Failed to create device link (0x180) with backlight-lcd0 tegra-xusb-padctl 3520000.padctl: Failed to create device link (0x180) with 1-0008 Reported-by: "Nícolas F. R. A. Prado" Closes: https://lore.kernel.org/all/7b995947-4540-4b17-872e-e107adca4598@notapiano/ Tested-by: "Nícolas F. R. A. Prado" Reported-by: Jon Hunter Closes: https://lore.kernel.org/all/20240910130019.35081-1-jonathanh@nvidia.com/ Signed-off-by: Saravana Kannan --- Don't pull this into stable branches unless its causing a regression in older LTS branches. fw_devlink code is complicated and it might end up with missing dependencies picking up changes piecemeal. -Saravana drivers/gpu/drm/display/drm_dp_aux_bus.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/display/drm_dp_aux_bus.c b/drivers/gpu/drm/display/drm_dp_aux_bus.c index d810529ebfb6..ec7eac6b595f 100644 --- a/drivers/gpu/drm/display/drm_dp_aux_bus.c +++ b/drivers/gpu/drm/display/drm_dp_aux_bus.c @@ -292,7 +292,7 @@ int of_dp_aux_populate_bus(struct drm_dp_aux *aux, aux_ep->dev.parent = aux->dev; aux_ep->dev.bus = &dp_aux_bus_type; aux_ep->dev.type = &dp_aux_device_type_type; - aux_ep->dev.of_node = of_node_get(np); + device_set_node(&aux_ep->dev, of_fwnode_handle(of_node_get(np))); dev_set_name(&aux_ep->dev, "aux-%s", dev_name(aux->dev)); ret = device_register(&aux_ep->dev);