From mboxrd@z Thu Jan 1 00:00:00 1970 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 4414DC021B8 for ; Tue, 4 Mar 2025 15:00:40 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BB08F10E2E4; Tue, 4 Mar 2025 15:00:39 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=tq-group.com header.i=@tq-group.com header.b="MXl9PX4B"; dkim=fail reason="key not found in DNS" (0-bit key; unprotected) header.d=ew.tq-group.com header.i=@ew.tq-group.com header.b="HFuLYNrg"; dkim-atps=neutral Received: from mx1.tq-group.com (mx1.tq-group.com [93.104.207.81]) by gabe.freedesktop.org (Postfix) with ESMTPS id 649A810E20D for ; Tue, 4 Mar 2025 15:00:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tq-group.com; i=@tq-group.com; q=dns/txt; s=key1; t=1741100432; x=1772636432; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Lykf3xaLUig9uEA0bAfwrVFURjMxGoC8WA1DRVWsg3U=; b=MXl9PX4BvdcS5am8mt973KVWwjuY6rriN+7u5FWE7KgP9HqEbn53WFx3 QMRqf99bxJGqI2+NrEaGYX58wz7dnUpF/68kRMsNfGtLrRJkPfarK44Ia BArrq1YUyo2oFl0V1oYi/+O43sB7XvzthCVQMb9bHvL72p16yWw63N2DS Httl97VlGn0uck6jLH4QGLjeDSQjn2Ds9NEDePX0QndtUSgpH9dCz0Q+8 NGc8R20CYmojtnz90dxZm5vqKMGZaAdP8wQHB+4qFErkXMaycui/mm0kR vafLrKoPc0t7PWh7oN7Tdl24WvEOVKzyoKS8GBOlf31QA/lOfX7Sb0mg9 Q==; X-CSE-ConnectionGUID: IRExU1k4THu6QG+Ybe9BqA== X-CSE-MsgGUID: XSWG8FDkRNmak4xANBU0ww== X-IronPort-AV: E=Sophos;i="6.14,220,1736809200"; d="scan'208";a="42271641" Received: from vmailcow01.tq-net.de ([10.150.86.48]) by mx1.tq-group.com with ESMTP; 04 Mar 2025 16:00:30 +0100 X-CheckPoint: {67C7158E-1E-903EAEAC-E04C76C8} X-MAIL-CPID: C2F7047D101734CC6A65597C5FF5C1BA_5 X-Control-Analysis: str=0001.0A006369.67C71591.004C, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 0CA0B16C670; Tue, 4 Mar 2025 16:00:21 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ew.tq-group.com; s=dkim; t=1741100425; 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=Lykf3xaLUig9uEA0bAfwrVFURjMxGoC8WA1DRVWsg3U=; b=HFuLYNrgATor3X44V0mhFXFM9yZTVQYOs9nf9eofeFEt8zh0aiX6SnpTHWS3ZjKzmQT3wk NPSksgs1prE95SLty+lkXiYQ6CCVGQf5Um7WehPNb+T5bjgHVCzCETclsaMeveuErfTBUJ Qqg/sqoxcYfwue0/+SaQqjkibmA4TIMY66ysDHmCAawZanMhtbljZY5rliBEccHwV20nEa L+WkFqpeuklmPkuWL1JQ5UfEm/7+bDk2tdwaLw4Kc96sOM41pSeRhBOs2RLAOCKc757ahi BHfILKL/SCJp0JiRygtITE/CgoJke523+rJeXxMFj+fvxtiF0EpkKvimBEBHMQ== From: Alexander Stein To: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andrzej.hajda@intel.com, neil.armstrong@linaro.org, rfoss@kernel.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, Liu Ying Subject: Re: [PATCH 0/5] drm/bridge: simple-bridge: Add DPI color encoder support Date: Tue, 04 Mar 2025 16:00:21 +0100 Message-ID: <22618349.EfDdHjke4D@steina-w> Organization: TQ-Systems GmbH In-Reply-To: <20250304101530.969920-1-victor.liu@nxp.com> References: <20250304101530.969920-1-victor.liu@nxp.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="iso-8859-1" X-Last-TLS-Session-Version: TLSv1.3 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hi, Am Dienstag, 4. M=E4rz 2025, 11:15:25 CET schrieb Liu Ying: > Hi, >=20 > This patch series aims to add DPI color encoder support as a simple DRM > bridge. A DPI color encoder simply converts input DPI color coding to > output DPI color coding, like Adafruit Kippah DPI hat[1] which converts > input 18-bit pixel data to 24-bit pixel data(with 2 low padding bits in > every color component though). A real use case is that NXP i.MX93 11x11 > EVK[2] and i.MX93 9x9 QSB[3] boards may connect a 24-bit DPI panel through > the Adafruit Kippah DPI hat. The display pipeline is >=20 > i.MX93 LCDIF display controller(RGB888) -> > i.MX93 parallel display format configuration(RGB666) -> > on-board Raspiberry Pi compatible interface(RPi)(RGB666) -> > Adafruit Kippah DPI hat(RGB888 with 2 low padding bits in color component= s) -> > 24-bit "ontat,kd50g21-40nt-a1" DPI panel >=20 > [1] https://learn.adafruit.com/adafruit-dpi-display-kippah-ttl-tft/downlo= ads > [2] https://www.nxp.com/design/design-center/development-boards-and-desig= ns/i.MX93EVK > [3] https://www.nxp.com/design/design-center/development-boards-and-desig= ns/IMX93QSB Thanks for this series. Actually I was about to create a similar (dumb) bridge. My use case is wrong wiring on hardware for DPI displays. The current workaround was to use a "new" display compatible with bus_format changes from MEDIA_BUS_FMT_RGB666_1X18 -> MEDIA_BUS_FMT_RGB888_1X24. I added this new bridge and changed my DT and it works flawlessly. Best regards Alexander > Liu Ying (5): > dt-bindings: display: Document DPI color codings > drm/of: Add drm_of_dpi_get_color_coding() > dt-bindings: display: simple-bridge: Document DPI color encoder > drm/bridge: simple-bridge: Add DPI color encoder support > drm/bridge: simple-bridge: Add next panel support >=20 > .../display/bridge/simple-bridge.yaml | 89 +++++++++++- > .../bindings/display/dpi-color-coding.yaml | 90 ++++++++++++ > drivers/gpu/drm/bridge/Kconfig | 1 + > drivers/gpu/drm/bridge/simple-bridge.c | 132 ++++++++++++++++-- > drivers/gpu/drm/drm_of.c | 43 ++++++ > include/drm/drm_of.h | 7 + > 6 files changed, 348 insertions(+), 14 deletions(-) > create mode 100644 Documentation/devicetree/bindings/display/dpi-color-c= oding.yaml >=20 >=20 =2D-=20 TQ-Systems GmbH | M=FChlstra=DFe 2, Gut Delling | 82229 Seefeld, Germany Amtsgericht M=FCnchen, HRB 105018 Gesch=E4ftsf=FChrer: Detlef Schneider, R=FCdiger Stahl, Stefan Schneider http://www.tq-group.com/