From patchwork Thu Jun 7 20:50:29 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Abhinav Kumar X-Patchwork-Id: 10453575 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id F021360146 for ; Thu, 7 Jun 2018 20:50:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DFDF62945E for ; Thu, 7 Jun 2018 20:50:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D088829A01; Thu, 7 Jun 2018 20:50:39 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8D0672945E for ; Thu, 7 Jun 2018 20:50:39 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A170B6F3E6; Thu, 7 Jun 2018 20:50:38 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from smtp.codeaurora.org (smtp.codeaurora.org [198.145.29.96]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4F6EA6F3E6 for ; Thu, 7 Jun 2018 20:50:37 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 055F0608D2; Thu, 7 Jun 2018 20:50:35 +0000 (UTC) Received: from abhinavk-linux.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: abhinavk@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id BEDBB6063F; Thu, 7 Jun 2018 20:50:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org BEDBB6063F From: Abhinav Kumar To: dri-devel@lists.freedesktop.org Subject: [DPU PATCH v4] drm/msm: higher values of pclk can exceed 32 bits when multiplied by a factor Date: Thu, 7 Jun 2018 13:50:29 -0700 Message-Id: <1528404629-4301-1-git-send-email-abhinavk@codeaurora.org> X-Mailer: git-send-email 1.9.1 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-msm@vger.kernel.org, Abhinav Kumar , hoegsberg@google.com, chandanu@codeaurora.org MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Make the pclk_rate u64 to accommodate higher pixel clock rates. Changes in v4: - fixed commit message Signed-off-by: Abhinav Kumar --- drivers/gpu/drm/msm/dsi/dsi_host.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c index b9f2ef9..596959c 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_host.c +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -669,7 +669,8 @@ static int dsi_calc_clk_rate(struct msm_dsi_host *msm_host, bool is_dual_dsi) const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd; u8 lanes = msm_host->lanes; u32 bpp = dsi_get_bpp(msm_host->format); - u32 pclk_rate; + u64 pclk_rate; + u64 pclk_bpp; if (!mode) { pr_err("%s: mode not set\n", __func__); @@ -689,13 +690,15 @@ static int dsi_calc_clk_rate(struct msm_dsi_host *msm_host, bool is_dual_dsi) if (is_dual_dsi) pclk_rate /= 2; + pclk_bpp = pclk_rate * bpp; if (lanes > 0) { - msm_host->byte_clk_rate = (pclk_rate * bpp) / (8 * lanes); + do_div(pclk_bpp, (8 * lanes)); } else { pr_err("%s: forcing mdss_dsi lanes to 1\n", __func__); - msm_host->byte_clk_rate = (pclk_rate * bpp) / 8; + do_div(pclk_bpp, 8); } msm_host->pixel_clk_rate = pclk_rate; + msm_host->byte_clk_rate = pclk_bpp; DBG("pclk=%d, bclk=%d", msm_host->pixel_clk_rate, msm_host->byte_clk_rate);