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 95947CD4F3C for ; Wed, 20 May 2026 09:26:43 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E8BE410EF7D; Wed, 20 May 2026 09:26:42 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="TunhrEnl"; dkim-atps=neutral Received: from mail-wm1-f49.google.com (mail-wm1-f49.google.com [209.85.128.49]) by gabe.freedesktop.org (Postfix) with ESMTPS id A3B9110EF7D for ; Wed, 20 May 2026 09:26:41 +0000 (UTC) Received: by mail-wm1-f49.google.com with SMTP id 5b1f17b1804b1-490229aa522so12898735e9.3 for ; Wed, 20 May 2026 02:26:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1779269200; x=1779874000; darn=lists.freedesktop.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=bCzspFC4iU1ErByw0rXOAxKL/qHlXFlidyuZgRUC4+M=; b=TunhrEnlN4TBLZDRNGPULlBJBnWbO3xf2DsV33k97WLDMBaKZ4TBr1dJ7eu2o/mOJl MiMw+d+FQwxYqFIb2C1k099/jEZa79oVGlDfWVsAC7stOzTCXWkr54bCnMvj2i7GIV+z 7iE8Iet7XFl8JLgtJRIQLi03XEUaooJJOTZdyiMomIdynKgytqCaGWkqtcve2SNx+1VB ptwj4fxuMiOAVuAmso6Y+X/YKd6mf+og5gWyJb/gZkBfZuRrm2FK0+AjjwQneGCJp6DD /EC4tguvwGSbG0q13g8FNHv+c+S9J9YUqnRo13DrvGOoTxXBHNdBf2H2G9cF4I+fF+Ov zAmw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779269200; x=1779874000; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=bCzspFC4iU1ErByw0rXOAxKL/qHlXFlidyuZgRUC4+M=; b=pLxwgCq0dWr6Pc10rZdrrxtYwIBpZ/uMpDfXhJIyLoWMM42pRz12fWOnjeyV1gsH2G kQCoJDjhKpOfTDOmW7RoVH8smR/Me73vqGnXHHrmWgK0eKGNK8WRgN4hrhe1FA19hRf3 qitOKtGH/Uf2dSkQEeEYGWt/zozHKMvV5TxF7alH4pnCFrll+le2CJ2m+fPdTil3/c1o 96Gs0H3CHsA2aTAMhS9SOyLh0mGD12DI21+7VY7kMOdHUe2E3b/cos0GOXauYWDG1+fC X6XfgMDrb75bAe7ERNuMR3i0IbmHKeCQDbD7H0B4C9r7y4WO0jcAqdDU9YnohcIlc6FE SCbw== X-Gm-Message-State: AOJu0Yxa+86WBVRsRCqVM197c2wJ4LWakdh6BM5m5389t8/Wtg4EiGR6 0uILBRgXezfbz5e1dyfd5ilXYAUrVo6j9dngx/ibDa97TBkxjMXBYl1u X-Gm-Gg: Acq92OHaJU97DawY/y7st31eDbrEXOTXlJs6hokpQANpZkfUeyqiUkXhpeuuBSUftBN 7b0s3xSF8i4zQYyHmV6PVMYF+2rb8q4GC/vjCdJiJW9/pecKy9hHnXIy1gCOnUvJeyZSvxhyCKv sK1yNUxIAXfCnbkRhGzqhTvz0njIwpqfJHFvs9XTb7Tk1J0aexIsAYAiXKEDRum00VR3qmmzSpZ x0yuY6Vey//etORip92A+r2lzxxnASBNCF8UL+NTRqCoLoGEHejOHFCMBsgHVJTemsvLpy0hllA fSbrF6Pi6HuQhBVede2iGoKhn5kCqsr6mfY8G23ZTORkovkfjFs9JtAmNt0lu3kol+xf2pr01cT VqbI3/ZY2iw4SJEbpy8IpLdt1ciz9+eFCUduGugeg5c/6PxX+FR1go/sGlbNXdm3MbDq9PKm+GV HL1FIWgxEWJENo X-Received: by 2002:a05:600c:5297:b0:48a:5342:36b5 with SMTP id 5b1f17b1804b1-48fe61ed375mr346315465e9.21.1779269199972; Wed, 20 May 2026 02:26:39 -0700 (PDT) Received: from xeon ([188.163.112.61]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49031731733sm7960805e9.0.2026.05.20.02.26.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 May 2026 02:26:39 -0700 (PDT) From: Svyatoslav Ryhel To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Luca Ceresoli , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Svyatoslav Ryhel Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 0/1] gpu/drm: bridge: tc358768: Add delay after PLL setup Date: Wed, 20 May 2026 12:26:27 +0300 Message-ID: <20260520092628.47539-1-clamor95@gmail.com> X-Mailer: git-send-email 2.51.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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" After tc358768_setup_pll() enables PLL_CKEN and the lock indicator comes up, the DSI register sequence runs near immediately. On TF700T this results in the bridge claiming PLL lock but producing no DSI video output: the panel powers up, the backlight comes on, but the framebuffer is never scanned out. Insert a small settling delay between PLL setup and the rest of the attach. Svyatoslav Ryhel (1): gpu/drm: bridge: tc358768: Add delay after PLL setup drivers/gpu/drm/bridge/tc358768.c | 3 +++ 1 file changed, 3 insertions(+) -- 2.51.0