From patchwork Thu Apr 4 08:16:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AngeloGioacchino Del Regno X-Patchwork-Id: 13617429 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 19DB5CD1292 for ; Thu, 4 Apr 2024 08:16:47 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F15BF1136BA; Thu, 4 Apr 2024 08:16:46 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=collabora.com header.i=@collabora.com header.b="wm7FNrnA"; dkim-atps=neutral Received: from madrid.collaboradmins.com (madrid.collaboradmins.com [46.235.227.194]) by gabe.freedesktop.org (Postfix) with ESMTPS id 597A61136B8 for ; Thu, 4 Apr 2024 08:16:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1712218601; bh=MEeUxwSfK3qSGYy1AhNxwTzbLHo3zAhiVdwm51OYXfA=; h=From:To:Cc:Subject:Date:From; b=wm7FNrnAHj4VppjQUc8/IKy1wbENRl5HrCs+A0ypdYjyvEBeG7YDfC3tYDMPhWB9E wv58lYcpsNnmSyNDx/n4gk9ajlTY679GKbjeCfjb4rlwjPISb1JZl7WLJLEs25y9L+ YtubQn1DxtNZoJ+W7Yx6NUEKPLRI57kecE4NcVJ+I7C5R85IMVkTio5qfGgvqXzUXR vy69y+XZD8qmHV5qxKzmLDL57CSHmP6tHKvGwlFwDrQzM+zs5uSzJikoG/PGQOGNmE v9ugQ1tjrWezBQnZc0q5COWLuxGXdteeng8zusoYnBLK84XS87CMyAd+GLWrbSeopT WrwfZNW0/PQvg== Received: from IcarusMOD.eternityproject.eu (cola.collaboradmins.com [195.201.22.229]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madrid.collaboradmins.com (Postfix) with ESMTPSA id 8ACE8378209A; Thu, 4 Apr 2024 08:16:40 +0000 (UTC) From: AngeloGioacchino Del Regno To: chunkuang.hu@kernel.org Cc: robh@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, p.zabel@pengutronix.de, airlied@gmail.com, daniel@ffwll.ch, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, shawn.sung@mediatek.com, yu-chang.lee@mediatek.com, ck.hu@mediatek.com, jitao.shi@mediatek.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, wenst@chromium.org, kernel@collabora.com Subject: [PATCH v1 0/3] drm/mediatek: Add support for OF graphs Date: Thu, 4 Apr 2024 10:16:32 +0200 Message-ID: <20240404081635.91412-1-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.44.0 MIME-Version: 1.0 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" The display IPs in MediaTek SoCs are *VERY* flexible and those support being interconnected with different instances of DDP IPs (for example, merge0 or merge1) and/or with different DDP IPs (for example, rdma can be connected with either color, dpi, dsi, merge, etc), forming a full Display Data Path that ends with an actual display. This series was born because of an issue that I've found while enabling support for MT8195/MT8395 boards with DSI output as main display: the current mtk_drm_route variations would not work as currently, the driver hardcodes a display path for Chromebooks, which have a DisplayPort panel with DSC support, instead of a DSI panel without DSC support. There are other reasons for which I wrote this series, and I find that hardcoding those paths - when a HW path is clearly board-specific - is highly suboptimal. Also, let's not forget about keeping this driver from becoming a huge list of paths for each combination of SoC->board->disp and... this and that. For more information, please look at the commit description for each of the commits included in this series. Please don't mind about the missing OVL_ADAPTOR support for OF graphs in this series: that needs a bit more thinking and a bit more work, and will come in a second series that will go on top of this a bit later, as the OF graph support for *at least* the primary display is essential *right now* to enable support for the MT8195/8395 EVK, Kontron SoM, Radxa NIO-12L and all of the other non-Chromebook boards to co-exist with Chromebooks. Besides, this is also a valid option for MT8188 Chromebooks which might have different DSI-or-eDP displays depending on the model (as far as I can see from the mtk_drm_route attempt for this SoC that is already present in this driver). This series was tested on MT8195 Cherry Tomato and on MT8395 Radxa NIO-12L with both hardcoded paths, OF graph support and partially hardcoded paths (meaning main display through OF graph and external display hardcoded, because of OVL_ADAPTOR). AngeloGioacchino Del Regno (3): dt-bindings: display: mediatek: Add OF graph support for board path dt-bindings: arm: mediatek: mmsys: Add OF graph support for board path drm/mediatek: Implement OF graphs support for display paths .../bindings/arm/mediatek/mediatek,mmsys.yaml | 23 ++ .../display/mediatek/mediatek,aal.yaml | 40 +++ .../display/mediatek/mediatek,ccorr.yaml | 21 ++ .../display/mediatek/mediatek,color.yaml | 22 ++ .../display/mediatek/mediatek,dither.yaml | 22 ++ .../display/mediatek/mediatek,dpi.yaml | 25 +- .../display/mediatek/mediatek,dsc.yaml | 24 ++ .../display/mediatek/mediatek,dsi.yaml | 27 +- .../display/mediatek/mediatek,ethdr.yaml | 22 ++ .../display/mediatek/mediatek,gamma.yaml | 19 ++ .../display/mediatek/mediatek,merge.yaml | 23 ++ .../display/mediatek/mediatek,od.yaml | 22 ++ .../display/mediatek/mediatek,ovl-2l.yaml | 22 ++ .../display/mediatek/mediatek,ovl.yaml | 22 ++ .../display/mediatek/mediatek,postmask.yaml | 21 ++ .../display/mediatek/mediatek,rdma.yaml | 22 ++ .../display/mediatek/mediatek,ufoe.yaml | 21 ++ drivers/gpu/drm/mediatek/mtk_dpi.c | 16 +- drivers/gpu/drm/mediatek/mtk_drm_drv.c | 255 ++++++++++++++++-- drivers/gpu/drm/mediatek/mtk_drm_drv.h | 2 +- drivers/gpu/drm/mediatek/mtk_dsi.c | 10 +- 21 files changed, 645 insertions(+), 36 deletions(-)