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 X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B2CBDC10F0E for ; Mon, 15 Apr 2019 19:16:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7718F2075B for ; Mon, 15 Apr 2019 19:16:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555355819; bh=nfQk0ngZLn9Z95jPjbg83rWEtp/FkqerijGIbM4nnWw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=rjm6hKrhdel7PC9r3n9zWfQzXfe9nPoF9rrnqQsf1KSVRcoEux6zu+tZRkXxTm20b VBpfwv776thaQAisF2OPptaBMjNYLHNlRJQMzhM1nSFu4I3Nd9A3nKBlf03lKfsKHJ mStV8B2u0KOijiBFzKwXuO/gjLJTHdxSgbX6mAWQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730728AbfDOTMr (ORCPT ); Mon, 15 Apr 2019 15:12:47 -0400 Received: from mail.kernel.org ([198.145.29.99]:50212 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731431AbfDOTMn (ORCPT ); Mon, 15 Apr 2019 15:12:43 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8F0EE218A1; Mon, 15 Apr 2019 19:12:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555355563; bh=nfQk0ngZLn9Z95jPjbg83rWEtp/FkqerijGIbM4nnWw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cGlXHTevpibpyTiNO5xxpsNfWVYHL96lui3jJEP+Bt/OPG/2+WIqQYETrX++M31zb wmT6ooThF/xNk/XoGJdpsfvYEznsPgcMLk+b4zuhdOrctZC0b2bJEJ6OPcjUo2SstN irqtcfeE2Xnr9mVM69mYy9jogob1dBwJlRUMXhl8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jernej Skrabec , Maxime Ripard Subject: [PATCH 5.0 067/117] drm/sun4i: DW HDMI: Lower max. supported rate for H6 Date: Mon, 15 Apr 2019 21:00:37 +0200 Message-Id: <20190415183748.361833181@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190415183744.887851196@linuxfoundation.org> References: <20190415183744.887851196@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jernej Skrabec commit cd9063757a227cf31ebf5391ccda2bf583b0806e upstream. Currently resolutions with pixel clock higher than 340 MHz don't work with H6 HDMI controller. They just produce a blank screen. Limit maximum pixel clock rate to 340 MHz until scrambling is supported. Cc: stable@vger.kernel.org # 5.0 Fixes: 40bb9d3147b2 ("drm/sun4i: Add support for H6 DW HDMI controller") Signed-off-by: Jernej Skrabec Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20190324190609.32721-1-jernej.skrabec@siol.net Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c +++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c @@ -48,8 +48,13 @@ static enum drm_mode_status sun8i_dw_hdmi_mode_valid_h6(struct drm_connector *connector, const struct drm_display_mode *mode) { - /* This is max for HDMI 2.0b (4K@60Hz) */ - if (mode->clock > 594000) + /* + * Controller support maximum of 594 MHz, which correlates to + * 4K@60Hz 4:4:4 or RGB. However, for frequencies greater than + * 340 MHz scrambling has to be enabled. Because scrambling is + * not yet implemented, just limit to 340 MHz for now. + */ + if (mode->clock > 340000) return MODE_CLOCK_HIGH; return MODE_OK;