From patchwork Fri Aug 7 07:17:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tanmay Shah X-Patchwork-Id: 11704977 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1AFC713B6 for ; Fri, 7 Aug 2020 07:17:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F392922CAF for ; Fri, 7 Aug 2020 07:17:44 +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="gXIgkMob" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726038AbgHGHRn (ORCPT ); Fri, 7 Aug 2020 03:17:43 -0400 Received: from mail29.static.mailgun.info ([104.130.122.29]:33838 "EHLO mail29.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726846AbgHGHRl (ORCPT ); Fri, 7 Aug 2020 03:17:41 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1596784661; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=7Nq0wp135Nx/L6BNy6QbckpPhcDK+sMN43/Zq4/evXg=; b=gXIgkMobAnNufCujWRyM30ZS84notjTBtLnr7kWGMwfxh4mTTCW5KDtPexPM6+1Gj/SX8B2/ yQj4P/rB/RLooexnSOJwRFyRI+/iBGC3FDmHM5cNmkiBpBaO57hD7E38aeRwW0wlhMVF9/fS aVUferkLqLDIaLtgXfLdlVjLLWw= 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-n15.prod.us-east-1.postgun.com with SMTP id 5f2d0014ba4c2cd367214f0e (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Fri, 07 Aug 2020 07:17:40 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 6EB6BC433C6; Fri, 7 Aug 2020 07:17:39 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 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 5FA69C433C6; Fri, 7 Aug 2020 07:17:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 5FA69C433C6 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: swboyd@chromium.org, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, robdclark@gmail.com Cc: linux-kernel@vger.kernel.org, freedreno@lists.freedesktop.org, seanpaul@chromium.org, 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 v9 1/5] drm: add constant N value in helper file Date: Fri, 7 Aug 2020 00:17:14 -0700 Message-Id: <20200807071718.17937-2-tanmay@codeaurora.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200807071718.17937-1-tanmay@codeaurora.org> References: <20200807071718.17937-1-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 729ec6e0d43a..10b8310f290b 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);