From patchwork Sun Oct 24 15:50:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 12580305 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 06181C433FE for ; Sun, 24 Oct 2021 15:50:36 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id C113860F9C for ; Sun, 24 Oct 2021 15:50:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org C113860F9C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2C2586E160; Sun, 24 Oct 2021 15:50:35 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5EED46E16D for ; Sun, 24 Oct 2021 15:50:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1635090632; 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; bh=bfLfimrUvqbu/6ah4vDLzD9ejhn1HthsyzwipdT3dvI=; b=NcHqGz+bMIC9nGkK+8xfjESrt7GQsLrIqUWbJQyE3OQPm5EAnN4fB+C6zK66pLIS8rvNNz xFves7X1dnfiA6jKS93XEdqCGVn+T1CG9Ndv0CyRzXp3Kbrre1FxU09+4Crth3/ribUaoS UHzjXKFXtEgVTtC3CNORNeyu4mOYtqc= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-552-981J1C4XMROBq5PU68ZtjA-1; Sun, 24 Oct 2021 11:50:26 -0400 X-MC-Unique: 981J1C4XMROBq5PU68ZtjA-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 5124510A8E02; Sun, 24 Oct 2021 15:50:25 +0000 (UTC) Received: from x1.localdomain (unknown [10.39.192.91]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8C55717CDB; Sun, 24 Oct 2021 15:50:21 +0000 (UTC) From: Hans de Goede To: Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= Cc: Hans de Goede , intel-gfx , dri-devel@lists.freedesktop.org, Tsuchiya Yuto Subject: [PATCH] drm/i915/vlv_dsi: Double pixelclock on read-back for dual-link panels Date: Sun, 24 Oct 2021 17:50:20 +0200 Message-Id: <20211024155020.126328-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=hdegoede@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com 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" In intel_dsi_get_config() double the pclk returned by foo_dsi_get_pclk() for dual-link panels. This fixes the following WARN triggering: i915 0000:00:02.0: [drm] *ERROR* [CRTC:51:pipe A] mismatch in pixel_rate (expected 235710, found 118056) i915 0000:00:02.0: [drm] *ERROR* [CRTC:51:pipe A] mismatch in hw.pipe_mode.crtc_clock (expected 235710, found 118056) i915 0000:00:02.0: [drm] *ERROR* [CRTC:51:pipe A] mismatch in hw.adjusted_mode.crtc_clock (expected 235710, found 118056) i915 0000:00:02.0: [drm] *ERROR* [CRTC:51:pipe A] mismatch in port_clock (expected 235710, found 118056) ------------[ cut here ]------------ pipe state doesn't match! WARNING: CPU: 3 PID: 136 at drivers/gpu/drm/i915/display/intel_display.c:9125 intel_display_finish_reset+0x1bd3/0x2050 [i915] ... This has been tested on a Xiaomi Mi Pad 2 (with CHT x5-Z8500 SoC) tablet, with a 1536x2048 dual-link DSI panel. Note this fix was taken from icl_dsi.c which does the same in its get_config(). Cc: Tsuchiya Yuto Signed-off-by: Hans de Goede Acked-by: Jani Nikula --- drivers/gpu/drm/i915/display/vlv_dsi.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/i915/display/vlv_dsi.c b/drivers/gpu/drm/i915/display/vlv_dsi.c index 3e646a58b38a..2b7909bc52ff 100644 --- a/drivers/gpu/drm/i915/display/vlv_dsi.c +++ b/drivers/gpu/drm/i915/display/vlv_dsi.c @@ -1265,7 +1265,9 @@ static void intel_dsi_get_config(struct intel_encoder *encoder, struct intel_crtc_state *pipe_config) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder); u32 pclk; + drm_dbg_kms(&dev_priv->drm, "\n"); pipe_config->output_types |= BIT(INTEL_OUTPUT_DSI); @@ -1277,6 +1279,9 @@ static void intel_dsi_get_config(struct intel_encoder *encoder, pclk = vlv_dsi_get_pclk(encoder, pipe_config); } + if (intel_dsi->dual_link) + pclk *= 2; + if (pclk) { pipe_config->hw.adjusted_mode.crtc_clock = pclk; pipe_config->port_clock = pclk;