From patchwork Tue Jun 30 18:45:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tanmay Shah X-Patchwork-Id: 11634567 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 CD1ED912 for ; Tue, 30 Jun 2020 18:46:35 +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 A96A62068F for ; Tue, 30 Jun 2020 18:46:35 +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="YnzUmxdk" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A96A62068F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8DFF089C1B; Tue, 30 Jun 2020 18:46:33 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from m43-7.mailgun.net (m43-7.mailgun.net [69.72.43.7]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2FA2989C8F for ; Tue, 30 Jun 2020 18:46:30 +0000 (UTC) DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1593542792; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=pCxMGoAE11mzNnegsROvEKZ7dz7oA11oMEGTQyVjkqw=; b=YnzUmxdkYC3LVThCTVupMA4uitdL7UK/j0RepNsTUVmFpkM8uGEuKkTjUDaVXzbC+7cf9Sd3 0gssnOL8OK2TbHfdesTjrCAeY3oi9s0shHFkeDm3UL9kJLKISuzJNxO+Ou0rgXPkX++zYdlx PkFZhcpfowDJRzOzz8ns6r3YDuo= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyJkOTU5ZSIsICJkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n20.prod.us-west-2.postgun.com with SMTP id 5efb887f3a8a8b20b8265460 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 30 Jun 2020 18:46:23 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id CC45FC433CB; Tue, 30 Jun 2020 18:46:23 +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 31A94C433C6; Tue, 30 Jun 2020 18:46:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 31A94C433C6 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: robh+dt@kernel.org, swboyd@chromium.org, sam@ravnborg.org Subject: [PATCH v8 2/6] drm: add constant N value in helper file Date: Tue, 30 Jun 2020 11:45:03 -0700 Message-Id: <20200630184507.15589-3-tanmay@codeaurora.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200630184507.15589-1-tanmay@codeaurora.org> References: <20200630184507.15589-1-tanmay@codeaurora.org> MIME-Version: 1.0 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: , Cc: devicetree@vger.kernel.org, Tanmay Shah , airlied@linux.ie, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Jani Nikula , seanpaul@chromium.org, abhinavk@codeaurora.org, varar@codeaurora.org, aravindh@codeaurora.org, freedreno@lists.freedesktop.org, chandanu@codeaurora.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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 c1836095ea38..81c461aeb3ba 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -8085,7 +8085,7 @@ 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 1165ec105638..73dae5bd6048 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);