From patchwork Thu Mar 31 15:19:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 12797244 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 42905C433FE for ; Thu, 31 Mar 2022 15:20:56 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D911E10F3CF; Thu, 31 Mar 2022 15:20:51 +0000 (UTC) Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) by gabe.freedesktop.org (Postfix) with ESMTPS id A71ED10F397 for ; Thu, 31 Mar 2022 15:20:43 +0000 (UTC) Received: from tr.lan (ip-89-176-112-137.net.upcbroadband.cz [89.176.112.137]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: marex@denx.de) by phobos.denx.de (Postfix) with ESMTPSA id 08E92841F3; Thu, 31 Mar 2022 17:20:42 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=denx.de; s=phobos-20191101; t=1648740042; bh=V3TN3Ues3mM6tHWyS0JVp0eLOWtPmyB6/Lr4TYKHo10=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pHkIMWKrPB8UWLyZWKGsC81oNWFO906lVSrgzxvHjvgKqQBFFMldK2duqlkLWMWMc 6QDG7r4hVx7Z4HVvFsV1P8BGB0KmVxzJgBCPZMj1n/2LKTHnzqBiLeHxsj5xkSc7Jg TKq8HYZJd74NEOS0fgYFdjtg6Toam23NeKHQOUYafcHt3daSRnSY0GFL/PT5vcNar3 1WlB1dVziEMQZjmq+E4e9pINEi/gbfLygRq/AEfL9lO7kFAf6b8AdtnybaTu6L085D lRzQTTCuY+x9xbKuG7q/Mb7aXyW4fN+lOSmokfLku4TSUVoGlFualedhhicMwqENB7 nfQEhxmBWDRrQ== From: Marek Vasut To: dri-devel@lists.freedesktop.org Subject: [PATCH v6 09/11] drm/bridge: tc358767: Detect bridge mode from connected endpoints in DT Date: Thu, 31 Mar 2022 17:19:50 +0200 Message-Id: <20220331151952.13221-10-marex@denx.de> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220331151952.13221-1-marex@denx.de> References: <20220331151952.13221-1-marex@denx.de> MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.103.5 at phobos.denx.de X-Virus-Status: Clean X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Marek Vasut , Jonas Karlman , Neil Armstrong , robert.foss@linaro.org, Maxime Ripard , Sam Ravnborg , Laurent Pinchart Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The TC358767/TC358867/TC9595 are all capable of operating in multiple modes, DPI-to-(e)DP, DSI-to-(e)DP, DSI-to-DPI. Only the first mode is currently supported. It is possible to find out the mode in which the bridge should be operated by testing connected endpoints in DT. Port allocation: port@0 - DSI input port@1 - DPI input/output port@2 - eDP output Possible connections: DPI -> port@1 -> port@2 -> eDP :: [port@0 is not connected] DSI -> port@0 -> port@2 -> eDP :: [port@1 is not connected] DSI -> port@0 -> port@1 -> DPI :: [port@2 is not connected] Add function to determine the bridge mode based on connected endpoints. Reviewed-by: Lucas Stach Tested-by: Lucas Stach # In both DPI to eDP and DSI to DPI mode. Signed-off-by: Marek Vasut Cc: Jonas Karlman Cc: Laurent Pinchart Cc: Maxime Ripard Cc: Neil Armstrong Cc: Sam Ravnborg --- V2: - New patch V3: - Add RB from Lucas V4: - Add TB from Lucas V5: - No change V6: - No change --- drivers/gpu/drm/bridge/tc358767.c | 46 ++++++++++++++++++++++++++++++- 1 file changed, 45 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c index 8c468f77618d..dd324cf16e4d 100644 --- a/drivers/gpu/drm/bridge/tc358767.c +++ b/drivers/gpu/drm/bridge/tc358767.c @@ -1621,6 +1621,50 @@ static int tc_probe_edp_bridge_endpoint(struct tc_data *tc) return ret; } +static int tc_probe_bridge_endpoint(struct tc_data *tc) +{ + struct device *dev = tc->dev; + struct of_endpoint endpoint; + struct device_node *node = NULL; + const u8 mode_dpi_to_edp = BIT(1) | BIT(2); + const u8 mode_dsi_to_edp = BIT(0) | BIT(2); + const u8 mode_dsi_to_dpi = BIT(0) | BIT(1); + u8 mode = 0; + + /* + * Determine bridge configuration. + * + * Port allocation: + * port@0 - DSI input + * port@1 - DPI input/output + * port@2 - eDP output + * + * Possible connections: + * DPI -> port@1 -> port@2 -> eDP :: [port@0 is not connected] + * DSI -> port@0 -> port@2 -> eDP :: [port@1 is not connected] + * DSI -> port@0 -> port@1 -> DPI :: [port@2 is not connected] + */ + + for_each_endpoint_of_node(dev->of_node, node) { + of_graph_parse_endpoint(node, &endpoint); + if (endpoint.port > 2) + return -EINVAL; + + mode |= BIT(endpoint.port); + } + + if (mode == mode_dpi_to_edp) + return tc_probe_edp_bridge_endpoint(tc); + else if (mode == mode_dsi_to_dpi) + dev_warn(dev, "The mode DSI-to-DPI is not supported!\n"); + else if (mode == mode_dsi_to_edp) + dev_warn(dev, "The mode DSI-to-(e)DP is not supported!\n"); + else + dev_warn(dev, "Invalid mode (0x%x) is not supported!\n", mode); + + return -EINVAL; +} + static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct device *dev = &client->dev; @@ -1633,7 +1677,7 @@ static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id) tc->dev = dev; - ret = tc_probe_edp_bridge_endpoint(tc); + ret = tc_probe_bridge_endpoint(tc); if (ret) return ret;