From patchwork Thu Aug 27 21:16:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tanmay Shah X-Patchwork-Id: 250510 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=-12.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 813F3C433DF for ; Thu, 27 Aug 2020 21:17:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5AE9920872 for ; Thu, 27 Aug 2020 21:17:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="qlbY2nsb" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726073AbgH0VRW (ORCPT ); Thu, 27 Aug 2020 17:17:22 -0400 Received: from mail29.static.mailgun.info ([104.130.122.29]:59606 "EHLO mail29.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726798AbgH0VRV (ORCPT ); Thu, 27 Aug 2020 17:17:21 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1598563040; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=zgK2ctNuPAFHLiqOhSsrVju3LuGfn76WfACVh6WfTfY=; b=qlbY2nsbg1NZ9Ie+2TsCBUMYgbt0dOU6LdjjI65oCh+7+YFewiy620hEZa8nimirjOd8zh05 JLtLDfFZMrtDDxF7eHVMfQ34DJUndqHW/x6AJhtvLwwmKXrW57eY/1Qa9nCtGdprarXXY8sX lSw5GX7kgB+5PBFCNT1t1CtSfRQ= X-Mailgun-Sending-Ip: 104.130.122.29 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n04.prod.us-east-1.postgun.com with SMTP id 5f4822e0db22b129dfaed574 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Thu, 27 Aug 2020 21:17:20 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 16885C433C6; Thu, 27 Aug 2020 21:17:19 +0000 (UTC) Received: from linuxdisplay-lab-04.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: tanmay) by smtp.codeaurora.org (Postfix) with ESMTPSA id B7AD5C433CA; Thu, 27 Aug 2020 21:17:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org B7AD5C433CA Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=tanmay@codeaurora.org From: Tanmay Shah To: dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org Cc: swboyd@chromium.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, seanpaul@chromium.org, robdclark@gmail.com, daniel@ffwll.ch, airlied@linux.ie, aravindh@codeaurora.org, abhinavk@codeaurora.org, khsieh@codeaurora.org, Chandan Uddaraju , Vara Reddy , Tanmay Shah , Jani Nikula Subject: [PATCH v12 1/5] drm: add constant N value in helper file Date: Thu, 27 Aug 2020 14:16:54 -0700 Message-Id: <20200827211658.27479-2-tanmay@codeaurora.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200827211658.27479-1-tanmay@codeaurora.org> References: <20200827211658.27479-1-tanmay@codeaurora.org> MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Chandan Uddaraju The constant N value (0x8000) is used by i915 DP driver. Define this value in dp helper header file to use in multiple Display Port drivers. Change i915 driver accordingly. Change in v6: Change commit message Signed-off-by: Chandan Uddaraju Signed-off-by: Vara Reddy Signed-off-by: Tanmay Shah Reviewed-by: Stephen Boyd Acked-by: Jani Nikula --- drivers/gpu/drm/i915/display/intel_display.c | 2 +- include/drm/drm_dp_helper.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index b2ec3a5141cc..db959d9f8ebc 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -8114,7 +8114,7 @@ static void compute_m_n(unsigned int m, unsigned int n, * which the devices expect also in synchronous clock mode. */ if (constant_n) - *ret_n = 0x8000; + *ret_n = DP_LINK_CONSTANT_N_VALUE; else *ret_n = min_t(unsigned int, roundup_pow_of_two(n), DATA_LINK_N_MAX); diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index e47dc22ebf50..a31d7aebb8b8 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -1134,6 +1134,7 @@ #define DP_MST_PHYSICAL_PORT_0 0 #define DP_MST_LOGICAL_PORT_0 8 +#define DP_LINK_CONSTANT_N_VALUE 0x8000 #define DP_LINK_STATUS_SIZE 6 bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE], int lane_count);