From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 46DF8136657; Wed, 4 Sep 2024 09:36:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725442567; cv=none; b=MjDc+95ImwhCnf+r5iJy4g+XKoj6IiCezvDYzXhxPV7bc4cruIx+HEPCLlUQJz28Vl8EK+3fvP7oh+L/X3NSBLSHwvB5UftsTeM8iZcT/UaUEavTxB4U8vRSnFjRtWUOx0yJ8vKsCh+LFeff9JCB/JOBmxVfWDek4vlxMYXPQfM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725442567; c=relaxed/simple; bh=LxkNSYAofDOvfm/1x55QP/ob58WB2jeme7PmvxzQTxc=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=bnT2pEZn7c4yFJJdVil/z8QjWmdgKww4xf0q5ddA0k94u7BAvMnf39pXhDG8VANHTgExLoTTLY4tgV2B6uw4e0Y3AgIckymhNHW1vFT1LeG6iUjFbvJwdqFtxK14Iw8DaamOWhsjiroFXUnzzKaPDzrJjnoVkEJ+v4GW7oIkbYk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Fjiksoh/; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Fjiksoh/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 45089C4CEC2; Wed, 4 Sep 2024 09:36:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1725442566; bh=LxkNSYAofDOvfm/1x55QP/ob58WB2jeme7PmvxzQTxc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Fjiksoh/7cDs5GAQtGkF7NbvnZvYCQXencrq4xsA3j8WLlB5ZuhafJ9Vxjm3ZDbwH GUh0CvwTi2GHEpHVM44sRvCEWC8sT0VAKXN7l89dwztEdpArFDCkp2KCHsS0vTHPPC r8l3OrP+06WDLdb0jQSBqTOD7W64qAA4kqkYkjE9vYnrYowoV7xu79/GHYQnmyywC4 XW3WHlGlZFOWro4shc+uMwsp5VeFQTizl6UasNkYoMWfRuDxWFL26r2MHgOvsfLEx1 8dKjtp7Va87ug3+24UIMvgmCZXw3juGcUHKjHsfADBFfQ9L70JyVtTPGydZclGRGzn +ZZ0F9aF6JDIw== Date: Wed, 4 Sep 2024 09:35:59 +0000 From: Tzung-Bi Shih To: Stephen Boyd Cc: chrome-platform@lists.linux.dev, linux-kernel@vger.kernel.org, patches@lists.linux.dev, devicetree@vger.kernel.org, Douglas Anderson , Pin-yen Lin , Andrzej Hajda , Benson Leung , Conor Dooley , Daniel Vetter , David Airlie , Dmitry Baryshkov , dri-devel@lists.freedesktop.org, Guenter Roeck , Jernej Skrabec , Jonas Karlman , Krzysztof Kozlowski , Laurent Pinchart , Lee Jones , Maarten Lankhorst , Maxime Ripard , Neil Armstrong , Prashant Malani , Robert Foss , Rob Herring , Thomas Zimmermann , Alexandre Belloni , Andy Shevchenko , Daniel Scally , Greg Kroah-Hartman , Heikki Krogerus , Ivan Orlov , linux-acpi@vger.kernel.org, linux-usb@vger.kernel.org, Mika Westerberg , "Rafael J . Wysocki" , Sakari Ailus , Vinod Koul Subject: Re: [PATCH v4 16/18] platform/chrome: cros_ec_typec: Add support for signaling DP HPD via drm_bridge Message-ID: References: <20240901040658.157425-1-swboyd@chromium.org> <20240901040658.157425-17-swboyd@chromium.org> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240901040658.157425-17-swboyd@chromium.org> On Sat, Aug 31, 2024 at 09:06:54PM -0700, Stephen Boyd wrote: > We can imagine that logically the EC is a device that has some number of > DisplayPort (DP) connector inputs, some number of USB3 connector inputs, > and some number of USB type-c connector outputs. If you squint enough it > looks like a USB type-c dock. Logically there's a crossbar pin > assignment capability within the EC that can assign USB and DP lanes to > USB type-c lanes in the connector (i.e. USB type-c pin configurations). > In reality, the EC is a microcontroller that has some TCPCs and > redrivers connected to it over something like i2c and DP/USB from the AP > is wired directly to those ICs, not the EC. > > [...] > > Cc: Prashant Malani > Cc: Benson Leung > Cc: Tzung-Bi Shih > Cc: > Cc: Pin-yen Lin > Signed-off-by: Stephen Boyd Reviewed-by: Tzung-Bi Shih