From patchwork Fri Jul 17 14:02:06 2026 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Albert Esteve X-Patchwork-Id: 2676 Return-Path: X-Original-To: noreply@patchwork.local Delivered-To: noreply@patchwork.local Received: from sea.lore.kernel.org (sea.lore.kernel.org [172.234.253.10]) by mxe881.netcup.net (Postfix) with ESMTPS id 2E5A71C2C22 for ; Fri, 17 Jul 2026 16:08:28 +0200 (CEST) Authentication-Results: mxe881; dkim=pass header.d=redhat.com; spf=pass (sender IP is 172.234.253.10) smtp.mailfrom=linux-sunxi+bounces-24486-noreply=patchwork.local@lists.linux.dev smtp.helo=sea.lore.kernel.org Received-SPF: pass (mxe881: domain of lists.linux.dev designates 172.234.253.10 as permitted sender) client-ip=172.234.253.10; envelope-from=linux-sunxi+bounces-24486-noreply=patchwork.local@lists.linux.dev; helo=sea.lore.kernel.org; Received: from smtp.subspace.kernel.org (conduit.subspace.kernel.org [100.90.174.1]) by sea.lore.kernel.org (Postfix) with ESMTP id BECBB3114E49 for ; Fri, 17 Jul 2026 14:03:39 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 9864C31326B; Fri, 17 Jul 2026 14:03:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="BnVKUaMp" X-Original-To: linux-sunxi@lists.linux.dev Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E55E33B71D3 for ; Fri, 17 Jul 2026 14:03:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784297019; cv=none; b=sRAUowRCLRCzkUhIIB40uYrFgDtm+9w6YG1lRC27n2UQY5wi+BfKVUAXz/HWSJXatnZMcv7FAIH3pkV1qmT38Yuwp5s40C5sGRe0O1LLCH7PRB5w5NjDztJwzxA6hQBun+NFj4+o8+hlTCWGK2OU7QmV8RZ/PQx5aIKF7rdYwy4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784297019; c=relaxed/simple; bh=3E/tqSH360XSqg1OCzjf9XdodE298Vql8IMXehxra3E=; h=From:Date:Subject:MIME-Version:Message-Id:References:In-Reply-To: To:Cc:Content-Type; b=CxYn+ObpT3kX0zYl4cZaylHlsmE4qjLKJHi0KpA4FGBPL6KimRSeJxKaUw1wqokUaLFMhSKw3bTtGlgX/ccEyT7rH4VYuMvoqWc6MRzOlF6Do/RDrXP+dAB3aAXi0Ra7TpO0sGjHKxbVsRHDHJ0CKizlnB1Pn02lZxI85hCdpWY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=BnVKUaMp; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1784297016; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=YK0UElVQAi+rBDr+qdXgzYaaDbZtSZ/mtY5vOEzXsbY=; b=BnVKUaMpZzFDFDaLxVHMLtXf1hUNM3yBVKLP/2a9qwZp1Z5rY/X6Ks5+3S1y39BaOVFjb0 6afKJzfRBuiMkhhIQOerlbY8vOQIMJ5ipKkNZ/DjhUsTEoU1k4P/0b0MsDRbQgXeDwVyyd aihx1OsXerhO4Ionha5S+O2p86xWSfk= Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-629-wGKLJ1nIN8KwvNUIWC06ug-1; Fri, 17 Jul 2026 10:03:33 -0400 X-MC-Unique: wGKLJ1nIN8KwvNUIWC06ug-1 X-Mimecast-MFC-AGG-ID: wGKLJ1nIN8KwvNUIWC06ug_1784297004 Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E8DCB18009EA; Fri, 17 Jul 2026 14:03:23 +0000 (UTC) Received: from [192.168.1.153] (headnet05.pony-001.prod.iad2.dc.redhat.com [10.2.32.117]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id BCEEC18005B3; Fri, 17 Jul 2026 14:03:09 +0000 (UTC) From: Albert Esteve Date: Fri, 17 Jul 2026 16:02:06 +0200 Subject: [PATCH v3 3/4] drm/panel: of_drm_find_panel() return a counted reference Precedence: bulk X-Mailing-List: linux-sunxi@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20260717-drm_refcount_wiring-v3-3-023900c32e01@redhat.com> References: <20260717-drm_refcount_wiring-v3-0-023900c32e01@redhat.com> In-Reply-To: <20260717-drm_refcount_wiring-v3-0-023900c32e01@redhat.com> To: Neil Armstrong , Jessica Zhang , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Andrzej Hajda , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Luca Ceresoli , Inki Dae , Jagan Teki , Marek Szyprowski , Laurentiu Palcu , Lucas Stach , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Paul Cercueil , Linus Walleij , Marek Vasut , Stefan Agner , Tomi Valkeinen , Laurent Pinchart , Kieran Bingham , Geert Uytterhoeven , Magnus Damm , Biju Das , Sandy Huang , =?utf-8?q?Heiko_St=C3=BCbner?= , Andy Yan , Yannick Fertre , Raphael Gallais-Pou , Philippe Cornu , Maxime Coquelin , Alexandre Torgue , Chen-Yu Tsai , Samuel Holland , Jyri Sarha , Jingoo Han , Seung-Woo Kim , Kyungmin Park , Krzysztof Kozlowski , Peter Griffin , Alim Akhtar , Alison Wang , Paul Kocialkowski , Alain Volmat , Raphael Gallais-Pou , Thierry Reding , Mikko Perttunen , Jonathan Hunter Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, linux-sunxi@lists.linux.dev, linux-samsung-soc@vger.kernel.org, linux-tegra@vger.kernel.org, Albert Esteve X-Developer-Signature: v=1; a=ed25519-sha256; t=1784296938; l=34080; i=aesteve@redhat.com; s=20260303; h=from:subject:message-id; bh=3E/tqSH360XSqg1OCzjf9XdodE298Vql8IMXehxra3E=; b=K0m1nQAlYkRE4QiygvbHDnFyW0AzrdUAC2GZFYXkMMjANVthJtAYC/F344HfpQg5tUMlkqfpU 7q/LsbQKzcVAghZalPT3FkEHEsUMuHyHzaeGAK7u2FaBGpz4XQf3kj/ X-Developer-Key: i=aesteve@redhat.com; a=ed25519; pk=YSFz6sOHd2L45+Fr8DIvHTi6lSIjhLZ5T+rkxspJt1s= X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: uejeE0lLUO1vmxp05NzRY8beCeyIRWj4v0_Aa6aNTW8_1784297004 X-Mimecast-Originator: redhat.com X-MORS-Enabled: yes X-MORS-DOMAIN: patchwork.local X-MORS-HOSTING: hosting172546 X-MORS-USER: hosting172546 X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= Callers of of_drm_find_panel() and drm_of_find_panel_or_bridge() receive a pointer with no reference held, creating a window where the panel device can be unregistered and freed between the lookup and first use (e.g., drm_panel_prepare()). Fix the lookup function by acquiring a reference with drm_panel_get() before returning, under panel_lock. Callers are now responsible for calling drm_panel_put() when they no longer need the pointer. For bridge drivers that immediately wrap the panel in a panel_bridge (which acquires its own reference), release the lookup reference right after the bridge creation call. For analogix-anx6345, which stores the panel for direct use, release the reference in the i2c remove path. For platform drivers using analogix_dp_core with a component lifecycle (exynos_dp, rockchip analogix_dp), release the lookup reference in the platform remove() function. The panel_bridge created during bind() holds a separate reference that devm cleanup releases after remove() returns. Also fix devm_drm_of_get_bridge() and drmm_of_get_bridge() in bridge/panel.c itself, update a second batch of drivers calling of_drm_find_panel() or drm_of_find_panel_or_bridge() to release the lookup reference after wrapping the panel in a bridge, and handle the cases where a panel is found but cannot be used, dropping the reference immediately in those paths. Assisted-by: Claude:claude-opus-4-6 Acked-by: Maxime Ripard Signed-off-by: Albert Esteve --- drivers/gpu/drm/bridge/analogix/analogix-anx6345.c | 12 +++++++++++ drivers/gpu/drm/bridge/fsl-ldb.c | 1 + drivers/gpu/drm/bridge/lontium-lt9211.c | 1 + drivers/gpu/drm/bridge/lvds-codec.c | 1 + drivers/gpu/drm/bridge/panel.c | 8 ++++++-- drivers/gpu/drm/bridge/samsung-dsim.c | 1 + drivers/gpu/drm/bridge/ssd2825.c | 1 + drivers/gpu/drm/bridge/tc358767.c | 2 ++ drivers/gpu/drm/bridge/tc358768.c | 1 + drivers/gpu/drm/bridge/waveshare-dsi.c | 1 + drivers/gpu/drm/drm_of.c | 3 ++- drivers/gpu/drm/drm_panel.c | 12 +++++++---- drivers/gpu/drm/exynos/exynos_dp.c | 19 ++++++++++++++++- drivers/gpu/drm/exynos/exynos_drm_dpi.c | 3 +++ drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c | 18 ++++++++++++++++ drivers/gpu/drm/imx/dcss/dcss-kms.c | 3 +++ drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 4 +++- drivers/gpu/drm/logicvc/logicvc_interface.c | 12 +++++++++++ drivers/gpu/drm/mcde/mcde_drv.c | 1 + drivers/gpu/drm/mcde/mcde_dsi.c | 1 + drivers/gpu/drm/mxsfb/mxsfb_drv.c | 1 + drivers/gpu/drm/omapdrm/dss/output.c | 1 + drivers/gpu/drm/pl111/pl111_drv.c | 1 + drivers/gpu/drm/renesas/rcar-du/rcar_du_encoder.c | 1 + drivers/gpu/drm/renesas/rcar-du/rcar_lvds.c | 1 + drivers/gpu/drm/renesas/rz-du/rzg2l_du_encoder.c | 1 + drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 11 ++++++++++ drivers/gpu/drm/rockchip/rockchip_lvds.c | 4 ++++ drivers/gpu/drm/rockchip/rockchip_rgb.c | 3 +++ drivers/gpu/drm/sti/sti_dvo.c | 3 +++ drivers/gpu/drm/stm/ltdc.c | 1 + drivers/gpu/drm/stm/lvds.c | 12 ++++++++--- drivers/gpu/drm/sun4i/sun4i_lvds.c | 13 ++++++++++++ drivers/gpu/drm/sun4i/sun4i_rgb.c | 13 ++++++++++++ drivers/gpu/drm/sun4i/sun4i_tcon.c | 2 ++ drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 6 +++++- drivers/gpu/drm/tegra/dsi.c | 5 +++++ drivers/gpu/drm/tegra/output.c | 24 +++++++++++++++++++--- drivers/gpu/drm/tidss/tidss_kms.c | 16 ++++++++++----- drivers/gpu/drm/tve200/tve200_drv.c | 1 + 40 files changed, 204 insertions(+), 21 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c b/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c index f3fe47b12edca..7330ccb2c74cf 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c +++ b/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c @@ -658,6 +658,11 @@ static bool anx6345_get_chip_id(struct anx6345 *anx6345) return false; } +static void anx6345_panel_put_action(void *data) +{ + drm_panel_put(data); +} + static int anx6345_i2c_probe(struct i2c_client *client) { struct anx6345 *anx6345; @@ -686,6 +691,13 @@ static int anx6345_i2c_probe(struct i2c_client *client) if (err) DRM_DEBUG("No panel found\n"); + if (anx6345->panel) { + err = devm_add_action_or_reset(dev, anx6345_panel_put_action, + anx6345->panel); + if (err) + return err; + } + /* 1.2V digital core power regulator */ anx6345->dvdd12 = devm_regulator_get(dev, "dvdd12"); if (IS_ERR(anx6345->dvdd12)) { diff --git a/drivers/gpu/drm/bridge/fsl-ldb.c b/drivers/gpu/drm/bridge/fsl-ldb.c index 9bfaa3f933709..27d7ba252927b 100644 --- a/drivers/gpu/drm/bridge/fsl-ldb.c +++ b/drivers/gpu/drm/bridge/fsl-ldb.c @@ -348,6 +348,7 @@ static int fsl_ldb_probe(struct platform_device *pdev) fsl_ldb->use_termination_resistor = true; fsl_ldb->panel_bridge = devm_drm_panel_bridge_add(dev, panel); + drm_panel_put(panel); if (IS_ERR(fsl_ldb->panel_bridge)) return PTR_ERR(fsl_ldb->panel_bridge); diff --git a/drivers/gpu/drm/bridge/lontium-lt9211.c b/drivers/gpu/drm/bridge/lontium-lt9211.c index 870175a848390..ae4aeba032a33 100644 --- a/drivers/gpu/drm/bridge/lontium-lt9211.c +++ b/drivers/gpu/drm/bridge/lontium-lt9211.c @@ -660,6 +660,7 @@ static int lt9211_parse_dt(struct lt9211 *ctx) return ret; if (panel) { panel_bridge = devm_drm_panel_bridge_add(dev, panel); + drm_panel_put(panel); if (IS_ERR(panel_bridge)) return PTR_ERR(panel_bridge); } diff --git a/drivers/gpu/drm/bridge/lvds-codec.c b/drivers/gpu/drm/bridge/lvds-codec.c index e6a7147e141b6..72ac427e7b88b 100644 --- a/drivers/gpu/drm/bridge/lvds-codec.c +++ b/drivers/gpu/drm/bridge/lvds-codec.c @@ -154,6 +154,7 @@ static int lvds_codec_probe(struct platform_device *pdev) lvds_codec->panel_bridge = devm_drm_panel_bridge_add_typed(dev, panel, lvds_codec->connector_type); + drm_panel_put(panel); if (IS_ERR(lvds_codec->panel_bridge)) return PTR_ERR(lvds_codec->panel_bridge); diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c index 3bfa18167dd26..218445528a57a 100644 --- a/drivers/gpu/drm/bridge/panel.c +++ b/drivers/gpu/drm/bridge/panel.c @@ -515,8 +515,10 @@ struct drm_bridge *devm_drm_of_get_bridge(struct device *dev, if (ret) return ERR_PTR(ret); - if (panel) + if (panel) { bridge = devm_drm_panel_bridge_add(dev, panel); + drm_panel_put(panel); + } return bridge; } @@ -549,8 +551,10 @@ struct drm_bridge *drmm_of_get_bridge(struct drm_device *drm, if (ret) return ERR_PTR(ret); - if (panel) + if (panel) { bridge = drmm_panel_bridge_add(drm, panel); + drm_panel_put(panel); + } return bridge; } diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c index 9ee0515074c78..0cd2a7e195061 100644 --- a/drivers/gpu/drm/bridge/samsung-dsim.c +++ b/drivers/gpu/drm/bridge/samsung-dsim.c @@ -1934,6 +1934,7 @@ static int samsung_dsim_host_attach(struct mipi_dsi_host *host, panel = of_drm_find_panel(remote); if (!IS_ERR(panel)) { next_bridge = devm_drm_panel_bridge_add(dev, panel); + drm_panel_put(panel); if (IS_ERR(next_bridge)) { ret = PTR_ERR(next_bridge); next_bridge = NULL; // Inhibit the cleanup action on an ERR_PTR diff --git a/drivers/gpu/drm/bridge/ssd2825.c b/drivers/gpu/drm/bridge/ssd2825.c index 54ca6bd6883ae..ac6d9b9d1f9e1 100644 --- a/drivers/gpu/drm/bridge/ssd2825.c +++ b/drivers/gpu/drm/bridge/ssd2825.c @@ -301,6 +301,7 @@ static int ssd2825_dsi_host_attach(struct mipi_dsi_host *host, struct mipi_dsi_d if (panel) { bridge = drm_panel_bridge_add_typed(panel, DRM_MODE_CONNECTOR_DSI); + drm_panel_put(panel); if (IS_ERR(bridge)) return PTR_ERR(bridge); } diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c index 7188935fdb826..29c0a58b907cc 100644 --- a/drivers/gpu/drm/bridge/tc358767.c +++ b/drivers/gpu/drm/bridge/tc358767.c @@ -2329,6 +2329,7 @@ static int tc_probe_dpi_bridge_endpoint(struct tc_data *tc) if (panel) { bridge = devm_drm_panel_bridge_add(dev, panel); + drm_panel_put(panel); if (IS_ERR(bridge)) return PTR_ERR(bridge); } @@ -2359,6 +2360,7 @@ static int tc_probe_edp_bridge_endpoint(struct tc_data *tc) struct drm_bridge *panel_bridge; panel_bridge = devm_drm_panel_bridge_add(dev, panel); + drm_panel_put(panel); if (IS_ERR(panel_bridge)) return PTR_ERR(panel_bridge); diff --git a/drivers/gpu/drm/bridge/tc358768.c b/drivers/gpu/drm/bridge/tc358768.c index 0f2820b373029..560cf2ab12079 100644 --- a/drivers/gpu/drm/bridge/tc358768.c +++ b/drivers/gpu/drm/bridge/tc358768.c @@ -479,6 +479,7 @@ static int tc358768_dsi_host_attach(struct mipi_dsi_host *host, if (panel) { bridge = drm_panel_bridge_add_typed(panel, DRM_MODE_CONNECTOR_DSI); + drm_panel_put(panel); if (IS_ERR(bridge)) return PTR_ERR(bridge); diff --git a/drivers/gpu/drm/bridge/waveshare-dsi.c b/drivers/gpu/drm/bridge/waveshare-dsi.c index ded57f298d640..650d9be7ae661 100644 --- a/drivers/gpu/drm/bridge/waveshare-dsi.c +++ b/drivers/gpu/drm/bridge/waveshare-dsi.c @@ -163,6 +163,7 @@ static int ws_bridge_probe(struct i2c_client *i2c) return dev_err_probe(dev, ret, "Failed to find remote panel\n"); ws->next_bridge = devm_drm_panel_bridge_add(dev, panel); + drm_panel_put(panel); if (IS_ERR(ws->next_bridge)) return PTR_ERR(ws->next_bridge); diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c index d03ada82eac96..1873a84514a68 100644 --- a/drivers/gpu/drm/drm_of.c +++ b/drivers/gpu/drm/drm_of.c @@ -225,7 +225,8 @@ EXPORT_SYMBOL_GPL(drm_of_encoder_active_endpoint); * @np: device tree node containing encoder output ports * @port: port in the device tree node * @endpoint: endpoint in the device tree node - * @panel: pointer to hold returned drm_panel, must not be NULL + * @panel: pointer to hold returned drm_panel, must not be NULL. On success + * the caller must call drm_panel_put() when done with the panel * @bridge: pointer to hold returned drm_bridge * * Given a DT node's port and endpoint number, find the connected node and diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c index 545fe93dc28fe..72cf86253c0cd 100644 --- a/drivers/gpu/drm/drm_panel.c +++ b/drivers/gpu/drm/drm_panel.c @@ -458,14 +458,17 @@ EXPORT_SYMBOL(__devm_drm_panel_alloc); #ifdef CONFIG_OF /** - * of_drm_find_panel - look up a panel using a device tree node + * of_drm_find_panel - look up and reference a panel by device tree node * @np: device tree node of the panel * * Searches the set of registered panels for one that matches the given device - * tree node. If a matching panel is found, return a pointer to it. + * tree node. If a matching panel is found, the panel's reference count is + * incremented before returning a pointer to it. The caller must call + * drm_panel_put() when it no longer needs the panel pointer. * - * Return: A pointer to the panel registered for the specified device tree - * node or an ERR_PTR() if no panel matching the device tree node can be found. + * Return: A reference-counted pointer to the panel registered for the specified + * device tree node or an ERR_PTR() if no panel matching the device tree node + * can be found. * * Possible error codes returned by this function: * @@ -484,6 +487,7 @@ struct drm_panel *of_drm_find_panel(const struct device_node *np) list_for_each_entry(panel, &panel_list, list) { if (panel->dev->of_node == np) { + drm_panel_get(panel); mutex_unlock(&panel_lock); return panel; } diff --git a/drivers/gpu/drm/exynos/exynos_dp.c b/drivers/gpu/drm/exynos/exynos_dp.c index b805403281504..a418011f7d4d6 100644 --- a/drivers/gpu/drm/exynos/exynos_dp.c +++ b/drivers/gpu/drm/exynos/exynos_dp.c @@ -182,8 +182,15 @@ static int exynos_dp_probe(struct platform_device *pdev) out: dp->adp = analogix_dp_probe(dev, &dp->plat_data); - if (IS_ERR(dp->adp)) + if (IS_ERR(dp->adp)) { + /* + * The driver core does not invoke remove() for failed probes, + * so release the probe-time panel reference here. + */ + if (dp->plat_data.panel) + drm_panel_put(dp->plat_data.panel); return PTR_ERR(dp->adp); + } if (dp->plat_data.panel || dp->plat_data.next_bridge) return component_add(&pdev->dev, &exynos_dp_ops); @@ -193,6 +200,16 @@ static int exynos_dp_probe(struct platform_device *pdev) static void exynos_dp_remove(struct platform_device *pdev) { + struct exynos_dp_device *dp = platform_get_drvdata(pdev); + + /* + * Release the probe-time reference from of_drm_find_panel(). If bind + * ran, the panel_bridge holds a second reference that devm cleanup + * will release when the bridge is destroyed after remove() returns. + */ + if (dp->plat_data.panel) + drm_panel_put(dp->plat_data.panel); + component_del(&pdev->dev, &exynos_dp_ops); } diff --git a/drivers/gpu/drm/exynos/exynos_drm_dpi.c b/drivers/gpu/drm/exynos/exynos_drm_dpi.c index 0dc36df6ada34..9d15a0035ea99 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dpi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dpi.c @@ -245,5 +245,8 @@ int exynos_dpi_remove(struct drm_encoder *encoder) exynos_dpi_disable(&ctx->encoder); + if (ctx->panel) + drm_panel_put(ctx->panel); + return 0; } diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c index 84eff7519e322..ec71fbbb0eb89 100644 --- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c +++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c @@ -109,6 +109,13 @@ static int fsl_dcu_attach_panel(struct fsl_dcu_drm_device *fsl_dev, return ret; } +static void fsl_dcu_panel_put_action(void *data) +{ + struct drm_panel *panel = data; + + drm_panel_put(panel); +} + int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev) { struct device_node *panel_node; @@ -124,6 +131,12 @@ int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev) if (IS_ERR(fsl_dev->connector.panel)) return PTR_ERR(fsl_dev->connector.panel); + ret = devm_add_action_or_reset(fsl_dev->dev, + fsl_dcu_panel_put_action, + fsl_dev->connector.panel); + if (ret) + return ret; + return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel); } @@ -132,6 +145,11 @@ int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev) return ret; if (panel) { + ret = devm_add_action_or_reset(fsl_dev->dev, + fsl_dcu_panel_put_action, panel); + if (ret) + return ret; + fsl_dev->connector.panel = panel; return fsl_dcu_attach_panel(fsl_dev, panel); } diff --git a/drivers/gpu/drm/imx/dcss/dcss-kms.c b/drivers/gpu/drm/imx/dcss/dcss-kms.c index 50bd7f36d36dd..01e0c10b6ea1a 100644 --- a/drivers/gpu/drm/imx/dcss/dcss-kms.c +++ b/drivers/gpu/drm/imx/dcss/dcss-kms.c @@ -77,6 +77,9 @@ static int dcss_kms_bridge_connector_init(struct dcss_kms_dev *kms) if (ret) return ret; + if (panel) + drm_panel_put(panel); + if (!bridge) { dev_err(ddev->dev, "No bridge found %d.\n", ret); return -ENODEV; diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c index 42c86f195c66b..1887e01d29701 100644 --- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c +++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c @@ -1297,9 +1297,11 @@ static int ingenic_drm_bind(struct device *dev, bool has_components) goto err_drvdata; } - if (panel) + if (panel) { bridge = devm_drm_panel_bridge_add_typed(dev, panel, DRM_MODE_CONNECTOR_DPI); + drm_panel_put(panel); + } ib = drmm_encoder_alloc(drm, struct ingenic_drm_bridge, encoder, NULL, DRM_MODE_ENCODER_DPI, NULL); diff --git a/drivers/gpu/drm/logicvc/logicvc_interface.c b/drivers/gpu/drm/logicvc/logicvc_interface.c index 689049d395c0d..81f760dc07f8d 100644 --- a/drivers/gpu/drm/logicvc/logicvc_interface.c +++ b/drivers/gpu/drm/logicvc/logicvc_interface.c @@ -28,6 +28,11 @@ #define logicvc_interface_from_drm_connector(c) \ container_of(c, struct logicvc_interface, drm_connector) +static void logicvc_panel_put_action(void *data) +{ + drm_panel_put(data); +} + static void logicvc_encoder_enable(struct drm_encoder *drm_encoder) { struct logicvc_drm *logicvc = logicvc_drm(drm_encoder->dev); @@ -160,6 +165,13 @@ int logicvc_interface_init(struct logicvc_drm *logicvc) if (ret == -EPROBE_DEFER) goto error_early; + if (interface->drm_panel) { + ret = devm_add_action_or_reset(dev, logicvc_panel_put_action, + interface->drm_panel); + if (ret) + goto error_early; + } + ret = drm_encoder_init(drm_dev, &interface->drm_encoder, &logicvc_encoder_funcs, encoder_type, NULL); if (ret) { diff --git a/drivers/gpu/drm/mcde/mcde_drv.c b/drivers/gpu/drm/mcde/mcde_drv.c index 5f2c462bad7e1..53275b575f0cb 100644 --- a/drivers/gpu/drm/mcde/mcde_drv.c +++ b/drivers/gpu/drm/mcde/mcde_drv.c @@ -153,6 +153,7 @@ static int mcde_modeset_init(struct drm_device *drm) if (panel) { bridge = drm_panel_bridge_add_typed(panel, DRM_MODE_CONNECTOR_DPI); + drm_panel_put(panel); if (IS_ERR(bridge)) { dev_err(drm->dev, "Could not connect panel bridge\n"); diff --git a/drivers/gpu/drm/mcde/mcde_dsi.c b/drivers/gpu/drm/mcde/mcde_dsi.c index 47d45897ed069..d9a454f226f79 100644 --- a/drivers/gpu/drm/mcde/mcde_dsi.c +++ b/drivers/gpu/drm/mcde/mcde_dsi.c @@ -1124,6 +1124,7 @@ static int mcde_dsi_bind(struct device *dev, struct device *master, if (panel) { bridge = drm_panel_bridge_add_typed(panel, DRM_MODE_CONNECTOR_DSI); + drm_panel_put(panel); if (IS_ERR(bridge)) { dev_err(dev, "error adding panel bridge\n"); return PTR_ERR(bridge); diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c b/drivers/gpu/drm/mxsfb/mxsfb_drv.c index 9b8fbda85d28a..7cb19c15bf39e 100644 --- a/drivers/gpu/drm/mxsfb/mxsfb_drv.c +++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c @@ -127,6 +127,7 @@ static int mxsfb_attach_bridge(struct mxsfb_drm_private *mxsfb) if (panel) { bridge = devm_drm_panel_bridge_add_typed(drm->dev, panel, DRM_MODE_CONNECTOR_DPI); + drm_panel_put(panel); if (IS_ERR(bridge)) return PTR_ERR(bridge); } diff --git a/drivers/gpu/drm/omapdrm/dss/output.c b/drivers/gpu/drm/omapdrm/dss/output.c index ca891aba38209..6e9bc605ee22f 100644 --- a/drivers/gpu/drm/omapdrm/dss/output.c +++ b/drivers/gpu/drm/omapdrm/dss/output.c @@ -43,6 +43,7 @@ int omapdss_device_init_output(struct omap_dss_device *out, struct drm_bridge *bridge; bridge = drm_panel_bridge_add(out->panel); + drm_panel_put(out->panel); if (IS_ERR(bridge)) { dev_err(out->dev, "unable to create panel bridge (%ld)\n", diff --git a/drivers/gpu/drm/pl111/pl111_drv.c b/drivers/gpu/drm/pl111/pl111_drv.c index ac7b1d12a0f59..8ec659b3c08eb 100644 --- a/drivers/gpu/drm/pl111/pl111_drv.c +++ b/drivers/gpu/drm/pl111/pl111_drv.c @@ -145,6 +145,7 @@ static int pl111_modeset_init(struct drm_device *dev) if (panel) { bridge = drm_panel_bridge_add_typed(panel, DRM_MODE_CONNECTOR_Unknown); + drm_panel_put(panel); if (IS_ERR(bridge)) { ret = PTR_ERR(bridge); goto finish; diff --git a/drivers/gpu/drm/renesas/rcar-du/rcar_du_encoder.c b/drivers/gpu/drm/renesas/rcar-du/rcar_du_encoder.c index db2088529b480..d8e7e9877ba86 100644 --- a/drivers/gpu/drm/renesas/rcar-du/rcar_du_encoder.c +++ b/drivers/gpu/drm/renesas/rcar-du/rcar_du_encoder.c @@ -69,6 +69,7 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu, bridge = devm_drm_panel_bridge_add_typed(rcdu->dev, panel, DRM_MODE_CONNECTOR_DPI); + drm_panel_put(panel); if (IS_ERR(bridge)) return PTR_ERR(no_free_ptr(bridge)); diff --git a/drivers/gpu/drm/renesas/rcar-du/rcar_lvds.c b/drivers/gpu/drm/renesas/rcar-du/rcar_lvds.c index 154410745a74b..cc2996f044721 100644 --- a/drivers/gpu/drm/renesas/rcar-du/rcar_lvds.c +++ b/drivers/gpu/drm/renesas/rcar-du/rcar_lvds.c @@ -791,6 +791,7 @@ static int rcar_lvds_parse_dt(struct rcar_lvds *lvds) if (lvds->panel) { lvds->next_bridge = devm_drm_panel_bridge_add(lvds->dev, lvds->panel); + drm_panel_put(lvds->panel); if (IS_ERR_OR_NULL(lvds->next_bridge)) { ret = -EINVAL; goto done; diff --git a/drivers/gpu/drm/renesas/rz-du/rzg2l_du_encoder.c b/drivers/gpu/drm/renesas/rz-du/rzg2l_du_encoder.c index f50d166b764f5..3d0999e4fcfdf 100644 --- a/drivers/gpu/drm/renesas/rz-du/rzg2l_du_encoder.c +++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_du_encoder.c @@ -90,6 +90,7 @@ int rzg2l_du_encoder_init(struct rzg2l_du_device *rcdu, bridge = devm_drm_panel_bridge_add_typed(rcdu->dev, panel, DRM_MODE_CONNECTOR_DPI); + drm_panel_put(panel); if (IS_ERR(bridge)) return PTR_ERR(no_free_ptr(bridge)); diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c index 06072efd7fca3..4b2795a6caf8c 100644 --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include #include @@ -472,6 +473,16 @@ static int rockchip_dp_probe(struct platform_device *pdev) static void rockchip_dp_remove(struct platform_device *pdev) { + struct rockchip_dp_device *dp = platform_get_drvdata(pdev); + + /* + * Release the probe-time reference from of_drm_find_panel(). If bind + * ran, the panel_bridge holds a second reference that devm cleanup + * will release when the bridge is destroyed after remove() returns. + */ + if (dp->plat_data.panel) + drm_panel_put(dp->plat_data.panel); + component_del(&pdev->dev, &rockchip_dp_component_ops); } diff --git a/drivers/gpu/drm/rockchip/rockchip_lvds.c b/drivers/gpu/drm/rockchip/rockchip_lvds.c index 7a0c4fa29f2f0..d99dc708572e1 100644 --- a/drivers/gpu/drm/rockchip/rockchip_lvds.c +++ b/drivers/gpu/drm/rockchip/rockchip_lvds.c @@ -605,6 +605,8 @@ static int rockchip_lvds_bind(struct device *dev, struct device *master, if (lvds->panel) { lvds->bridge = drm_panel_bridge_add_typed(lvds->panel, DRM_MODE_CONNECTOR_LVDS); + drm_panel_put(lvds->panel); + lvds->panel = NULL; if (IS_ERR(lvds->bridge)) { ret = PTR_ERR(lvds->bridge); goto err_free_encoder; @@ -641,6 +643,8 @@ static int rockchip_lvds_bind(struct device *dev, struct device *master, err_free_encoder: drm_encoder_cleanup(encoder); err_put_remote: + if (lvds->panel) + drm_panel_put(lvds->panel); of_node_put(remote); err_put_port: of_node_put(port); diff --git a/drivers/gpu/drm/rockchip/rockchip_rgb.c b/drivers/gpu/drm/rockchip/rockchip_rgb.c index add3123e5ce70..c908ea4cfa67a 100644 --- a/drivers/gpu/drm/rockchip/rockchip_rgb.c +++ b/drivers/gpu/drm/rockchip/rockchip_rgb.c @@ -131,6 +131,8 @@ struct rockchip_rgb *rockchip_rgb_init(struct device *dev, if (ret < 0) { DRM_DEV_ERROR(drm_dev->dev, "failed to initialize encoder: %d\n", ret); + if (panel) + drm_panel_put(panel); return ERR_PTR(ret); } @@ -139,6 +141,7 @@ struct rockchip_rgb *rockchip_rgb_init(struct device *dev, if (panel) { bridge = drm_panel_bridge_add_typed(panel, DRM_MODE_CONNECTOR_LVDS); + drm_panel_put(panel); if (IS_ERR(bridge)) return ERR_CAST(bridge); } diff --git a/drivers/gpu/drm/sti/sti_dvo.c b/drivers/gpu/drm/sti/sti_dvo.c index 7484d3c3f4ed5..64a9da0362fb8 100644 --- a/drivers/gpu/drm/sti/sti_dvo.c +++ b/drivers/gpu/drm/sti/sti_dvo.c @@ -492,6 +492,9 @@ static void sti_dvo_unbind(struct device *dev, { struct sti_dvo *dvo = dev_get_drvdata(dev); + if (dvo->panel) + drm_panel_put(dvo->panel); + drm_bridge_remove(&dvo->bridge); } diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c index 95fcfa48d8be3..daf198edb42f5 100644 --- a/drivers/gpu/drm/stm/ltdc.c +++ b/drivers/gpu/drm/stm/ltdc.c @@ -1982,6 +1982,7 @@ int ltdc_load(struct drm_device *ddev) if (panel) { bridge = drmm_panel_bridge_add(ddev, panel); + drm_panel_put(panel); if (IS_ERR(bridge)) { drm_err(ddev, "panel-bridge endpoint %d\n", i); ret = PTR_ERR(bridge); diff --git a/drivers/gpu/drm/stm/lvds.c b/drivers/gpu/drm/stm/lvds.c index 50a878688e477..f887a708afb73 100644 --- a/drivers/gpu/drm/stm/lvds.c +++ b/drivers/gpu/drm/stm/lvds.c @@ -1068,20 +1068,20 @@ static int lvds_probe(struct platform_device *pdev) if (IS_ERR(lvds->base)) { ret = PTR_ERR(lvds->base); dev_err(dev, "Unable to get regs %d\n", ret); - return ret; + goto err_put_panel; } lvds->pclk = devm_clk_get(dev, "pclk"); if (IS_ERR(lvds->pclk)) { ret = PTR_ERR(lvds->pclk); dev_err(dev, "Unable to get peripheral clock: %d\n", ret); - return ret; + goto err_put_panel; } ret = clk_prepare_enable(lvds->pclk); if (ret) { dev_err(dev, "%s: Failed to enable peripheral clk\n", __func__); - return ret; + goto err_put_panel; } rstc = devm_reset_control_get_exclusive(dev, NULL); @@ -1181,6 +1181,9 @@ static int lvds_probe(struct platform_device *pdev) err_lvds_probe: clk_disable_unprepare(lvds->pclk); +err_put_panel: + if (lvds->panel) + drm_panel_put(lvds->panel); return ret; } @@ -1189,6 +1192,9 @@ static void lvds_remove(struct platform_device *pdev) { struct stm_lvds *lvds = platform_get_drvdata(pdev); + if (lvds->panel) + drm_panel_put(lvds->panel); + lvds_pixel_clk_unregister(lvds); drm_bridge_remove(&lvds->lvds_bridge); diff --git a/drivers/gpu/drm/sun4i/sun4i_lvds.c b/drivers/gpu/drm/sun4i/sun4i_lvds.c index 6716e895ae8a4..e1b342c922224 100644 --- a/drivers/gpu/drm/sun4i/sun4i_lvds.c +++ b/drivers/gpu/drm/sun4i/sun4i_lvds.c @@ -18,6 +18,11 @@ #include "sun4i_tcon.h" #include "sun4i_lvds.h" +static void sun4i_panel_put_action(void *data) +{ + drm_panel_put(data); +} + struct sun4i_lvds { struct drm_connector connector; struct drm_encoder encoder; @@ -113,6 +118,14 @@ int sun4i_lvds_init(struct drm_device *drm, struct sun4i_tcon *tcon) return 0; } + if (lvds->panel) { + ret = devm_add_action_or_reset(tcon->dev, + sun4i_panel_put_action, + lvds->panel); + if (ret) + return ret; + } + drm_encoder_helper_add(&lvds->encoder, &sun4i_lvds_enc_helper_funcs); ret = drm_simple_encoder_init(drm, &lvds->encoder, diff --git a/drivers/gpu/drm/sun4i/sun4i_rgb.c b/drivers/gpu/drm/sun4i/sun4i_rgb.c index dfb6acc42f02e..0066bec5a9e5a 100644 --- a/drivers/gpu/drm/sun4i/sun4i_rgb.c +++ b/drivers/gpu/drm/sun4i/sun4i_rgb.c @@ -43,6 +43,11 @@ drm_encoder_to_sun4i_rgb(struct drm_encoder *encoder) encoder); } +static void sun4i_panel_put_action(void *data) +{ + drm_panel_put(data); +} + static int sun4i_rgb_get_modes(struct drm_connector *connector) { struct sun4i_rgb *rgb = @@ -205,6 +210,14 @@ int sun4i_rgb_init(struct drm_device *drm, struct sun4i_tcon *tcon) return 0; } + if (rgb->panel) { + ret = devm_add_action_or_reset(tcon->dev, + sun4i_panel_put_action, + rgb->panel); + if (ret) + return ret; + } + drm_encoder_helper_add(&rgb->encoder, &sun4i_rgb_enc_helper_funcs); ret = drm_simple_encoder_init(drm, &rgb->encoder, diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c index 960e83c8291da..d4c1723c5e3d8 100644 --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c @@ -1326,6 +1326,8 @@ static int sun4i_tcon_probe(struct platform_device *pdev) ret = drm_of_find_panel_or_bridge(node, 1, 0, &panel, &bridge); if (ret == -EPROBE_DEFER) return ret; + if (panel) + drm_panel_put(panel); } return component_add(&pdev->dev, &sun4i_tcon_ops); diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c index c35b70d83e53b..09c2a48b59128 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c @@ -967,8 +967,10 @@ static int sun6i_dsi_attach(struct mipi_dsi_host *host, if (IS_ERR(panel)) return PTR_ERR(panel); - if (!dsi->drm || !dsi->drm->registered) + if (!dsi->drm || !dsi->drm->registered) { + drm_panel_put(panel); return -EPROBE_DEFER; + } dsi->panel = panel; dsi->device = device; @@ -985,6 +987,8 @@ static int sun6i_dsi_detach(struct mipi_dsi_host *host, { struct sun6i_dsi *dsi = host_to_sun6i_dsi(host); + if (dsi->panel) + drm_panel_put(dsi->panel); dsi->panel = NULL; dsi->device = NULL; diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c index 7f25c50621c94..500d7afd86db1 100644 --- a/drivers/gpu/drm/tegra/dsi.c +++ b/drivers/gpu/drm/tegra/dsi.c @@ -1498,6 +1498,10 @@ static int tegra_dsi_host_attach(struct mipi_dsi_host *host, if (!dsi->master) { struct tegra_output *output = &dsi->output; + /* + * tegra_output_probe() never populates a panel for DSI + * outputs, so output->panel is always NULL here. + */ output->panel = of_drm_find_panel(device->dev.of_node); if (IS_ERR(output->panel)) output->panel = NULL; @@ -1516,6 +1520,7 @@ static int tegra_dsi_host_detach(struct mipi_dsi_host *host, struct tegra_output *output = &dsi->output; if (output->panel && &device->dev == output->panel->dev) { + drm_panel_put(output->panel); output->panel = NULL; if (output->connector.dev) diff --git a/drivers/gpu/drm/tegra/output.c b/drivers/gpu/drm/tegra/output.c index 49e4f63a5550d..d0ba3bd0aab8f 100644 --- a/drivers/gpu/drm/tegra/output.c +++ b/drivers/gpu/drm/tegra/output.c @@ -117,11 +117,19 @@ int tegra_output_probe(struct tegra_output *output) */ WARN_ON(output->panel || output->bridge); + if (output->panel) { + drm_panel_put(output->panel); + output->panel = NULL; + } + output->panel = of_drm_find_panel(panel); of_node_put(panel); - if (IS_ERR(output->panel)) - return PTR_ERR(output->panel); + if (IS_ERR(output->panel)) { + err = PTR_ERR(output->panel); + output->panel = NULL; + return err; + } } ddc = of_parse_phandle(output->of_node, "nvidia,ddc-i2c-bus", 0); @@ -131,7 +139,7 @@ int tegra_output_probe(struct tegra_output *output) if (!output->ddc) { err = -EPROBE_DEFER; - return err; + goto put_i2c; } } @@ -185,6 +193,11 @@ int tegra_output_probe(struct tegra_output *output) return 0; put_i2c: + if (output->panel) { + drm_panel_put(output->panel); + output->panel = NULL; + } + if (output->ddc) i2c_put_adapter(output->ddc); @@ -195,6 +208,11 @@ int tegra_output_probe(struct tegra_output *output) void tegra_output_remove(struct tegra_output *output) { + if (output->panel) { + drm_panel_put(output->panel); + output->panel = NULL; + } + if (output->hpd_gpio) free_irq(output->hpd_irq, output); diff --git a/drivers/gpu/drm/tidss/tidss_kms.c b/drivers/gpu/drm/tidss/tidss_kms.c index 1512ee2574b66..70c14c3be10d5 100644 --- a/drivers/gpu/drm/tidss/tidss_kms.c +++ b/drivers/gpu/drm/tidss/tidss_kms.c @@ -162,6 +162,7 @@ static int tidss_dispc_modeset_init(struct tidss_device *tidss) if (panel) { u32 conn_type; + int ret; dev_dbg(dev, "Setting up panel for port %d\n", i); @@ -176,7 +177,8 @@ static int tidss_dispc_modeset_init(struct tidss_device *tidss) break; default: WARN_ON(1); - return -EINVAL; + ret = -EINVAL; + goto put_panel; } if (panel->connector_type != conn_type) { @@ -184,16 +186,20 @@ static int tidss_dispc_modeset_init(struct tidss_device *tidss) "%s: Panel %s has incompatible connector type for vp%d (%d != %d)\n", __func__, dev_name(panel->dev), i, panel->connector_type, conn_type); - return -EINVAL; + ret = -EINVAL; + goto put_panel; } bridge = devm_drm_panel_bridge_add(dev, panel); - if (IS_ERR(bridge)) { + ret = PTR_ERR_OR_ZERO(bridge); + if (ret) dev_err(dev, "failed to set up panel bridge for port %d\n", i); - return PTR_ERR(bridge); - } +put_panel: + drm_panel_put(panel); + if (ret) + return ret; } pipes[num_pipes].hw_videoport = i; diff --git a/drivers/gpu/drm/tve200/tve200_drv.c b/drivers/gpu/drm/tve200/tve200_drv.c index 562f3f11812a3..f858c58ccb994 100644 --- a/drivers/gpu/drm/tve200/tve200_drv.c +++ b/drivers/gpu/drm/tve200/tve200_drv.c @@ -84,6 +84,7 @@ static int tve200_modeset_init(struct drm_device *dev) if (panel) { bridge = drm_panel_bridge_add_typed(panel, DRM_MODE_CONNECTOR_Unknown); + drm_panel_put(panel); if (IS_ERR(bridge)) { ret = PTR_ERR(bridge); goto out_bridge;