From patchwork Mon Nov 7 07:20:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nautiyal, Ankit K" X-Patchwork-Id: 13033883 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 69B52C433FE for ; Mon, 7 Nov 2022 07:21:29 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1D8B810E1F4; Mon, 7 Nov 2022 07:21:06 +0000 (UTC) Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id B9B1810E1FC; Mon, 7 Nov 2022 07:20:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1667805641; x=1699341641; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=BVhn3qxYXFyXLd/cxchSoeyQ1oDKrnQZn5mzg2RTFjs=; b=FYhHuFPsI+2OjRPEWHugd1neL0y7WwHyvaV2Xr3yUQRwpw+8FJr2qRO4 2Mc9aOYDyCaLrPv/nsQuI8xCiv4Ov0VAFpD/bPRJczvWYidUr35k7zB0G S7n6Mp6FAJAZpKx8EWRlUc/KoyqWjg159/ExbRGCfGt3ncsVN9xbiGXcr Op9Fi4dJJ1PFYpH3LG8PQProZsVOpqLK4gEdegDm8/uNu61oAq1BqCdm0 WHo0mu71d1/+b9UOqVgd+bQH1SKGOT/yOrmpIgPTnLR6Nmz9dzSmE47wy zqKeMCS9UbTGZBCQGj5gBH+7YAGF/pJKP9Q/fSr4FHuVEE4uHMQXf1CL1 Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10523"; a="372463398" X-IronPort-AV: E=Sophos;i="5.96,143,1665471600"; d="scan'208";a="372463398" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Nov 2022 23:20:41 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10523"; a="704767296" X-IronPort-AV: E=Sophos;i="5.96,143,1665471600"; d="scan'208";a="704767296" Received: from srr4-3-linux-103-aknautiy.iind.intel.com ([10.223.34.160]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Nov 2022 23:20:39 -0800 From: Ankit Nautiyal To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Date: Mon, 7 Nov 2022 12:50:43 +0530 Message-Id: <20221107072045.628895-14-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221107072045.628895-1-ankit.k.nautiyal@intel.com> References: <20221107072045.628895-1-ankit.k.nautiyal@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [RFC 13/15] drm/i915/hdmi21/mtl: Enable Scrambling only for FRL mode X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" In FRL mode, the Scrambling is always enabled by the HW. The High TMDS Char Rate and Scrambing Enable bit of reg TRANS_DDI_FUNC_CTRL are only set in TMDS mode and not in FRL mode. Signed-off-by: Ankit Nautiyal --- drivers/gpu/drm/i915/display/intel_hdmi.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c index 1dd0b0f2e2f1..1eadf77dc819 100644 --- a/drivers/gpu/drm/i915/display/intel_hdmi.c +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c @@ -2292,7 +2292,13 @@ int intel_hdmi_compute_config(struct intel_encoder *encoder, pipe_config->lane_count = 4; - if (scdc->scrambling.supported && DISPLAY_VER(dev_priv) >= 10) { + /* + * Enable scrambing for only for TMDS mode. + * For FRL mode, scrambling is always enabled by HW, and + * scrambling enable and high tmds clock bits are not used. + */ + if (scdc->scrambling.supported && DISPLAY_VER(dev_priv) >= 10 && + !pipe_config->frl.enable) { if (scdc->scrambling.low_rates) pipe_config->hdmi_scrambling = true;