From patchwork Fri Jun 14 22:47:29 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 10996863 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1892A1515 for ; Fri, 14 Jun 2019 22:47:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0375C28795 for ; Fri, 14 Jun 2019 22:47:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EB5EF287A4; Fri, 14 Jun 2019 22:47:58 +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 A088328795 for ; Fri, 14 Jun 2019 22:47:58 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 59A1189590; Fri, 14 Jun 2019 22:47:57 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-pg1-x542.google.com (mail-pg1-x542.google.com [IPv6:2607:f8b0:4864:20::542]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7AC4489590 for ; Fri, 14 Jun 2019 22:47:55 +0000 (UTC) Received: by mail-pg1-x542.google.com with SMTP id 20so2313729pgr.4 for ; Fri, 14 Jun 2019 15:47:55 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=B/paYYaNElnUhrLCMfr9aofzvSpDY7fIjtUGwDwrL/w=; b=kT3OL61hUhHwGIOyV35avdQ1XtN9U5Duo7IdrImWRB6kI6mXt+V+iOEGoia4j78uby jjgugJnzubzRIfZo5cKzhKJvyaown7fW+HYNDzh07C+qGUyRiqyHsqjln8emvtx1k402 UBY1PgAs5ucRHSsX/WVhJGq7qksgO/deIJu3sE1d3m4clQ+9Vj0eWZER4TF37u2DOzAZ 0zOT2IPE+4gJFAxTgfQfTfyPIg6bd7yNINaVfuxsePYOOdw/egJlGBb0DqBWwMjb5Z3h krYcaI1AHv27prqRe0ILx1MSGSEebQ+mRoASd/Yc9JPytXM0ZEf7VOB70tS43ZIo9Rq0 Yyxw== X-Gm-Message-State: APjAAAVK+4DZqPq5X53W7H9Gcd+DQNeCwyCKkSsOHNkaMcPVHvkcpeu3 +oVS9t1A/M5LLOYRXIJLJ8NkNA== X-Google-Smtp-Source: APXvYqwCFm4zexZwb/yHk0T7k2vyRVj2XJif4vKx4gUkaC3e6ysgiT29t7k5lmVupIUZSX9ZhqMjSw== X-Received: by 2002:a63:441c:: with SMTP id r28mr37978657pga.255.1560552475017; Fri, 14 Jun 2019 15:47:55 -0700 (PDT) Received: from tictac2.mtv.corp.google.com ([2620:15c:202:1:24fa:e766:52c9:e3b2]) by smtp.gmail.com with ESMTPSA id x7sm3706087pfm.82.2019.06.14.15.47.54 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Fri, 14 Jun 2019 15:47:54 -0700 (PDT) From: Douglas Anderson To: Sandy Huang , heiko@sntech.de, seanpaul@chromium.org Subject: [PATCH 1/2] drm/rockchip: Properly adjust to a true clock in adjusted_mode Date: Fri, 14 Jun 2019 15:47:29 -0700 Message-Id: <20190614224730.98622-1-dianders@chromium.org> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog MIME-Version: 1.0 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=B/paYYaNElnUhrLCMfr9aofzvSpDY7fIjtUGwDwrL/w=; b=ApCzoYVFWJ+gmiLTLvrC4zRCv/sxTzAUuGigYReuCPkwv8+JbQtTQ1ujJvy8eXWLqB +IQTzppqRJKhqe+8V7UEuUHo4bd+AM07L3HjWFZQQdGpjnep077mDCdlHdC1RIk2DgQq 5mJV4O++xveG92zkhvhU6kYaRMIla/IEBvu+I= 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: David Airlie , Douglas Anderson , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, urjaman@gmail.com, linux-rockchip@lists.infradead.org, Yakir Yang , linux-arm-kernel@lists.infradead.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP When fixing up the clock in vop_crtc_mode_fixup() we're not doing it quite correctly. Specifically if we've got the true clock 266666667 Hz, we'll perform this calculation: 266666667 / 1000 => 266666 Later when we try to set the clock we'll do clk_set_rate(266666 * 1000). The common clock framework won't actually pick the proper clock in this case since it always wants clocks <= the specified one. Let's solve this by using DIV_ROUND_UP. Fixes: b59b8de31497 ("drm/rockchip: return a true clock rate to adjusted_mode") Signed-off-by: Douglas Anderson Signed-off-by: Sean Paul Reviewed-by: Yakir Yang --- Back in 2016 Mark Yao said he applied this to his drm fixes [1], but it's 2019 and it's still missing so I'm posting again. [1] https://patchwork.freedesktop.org/patch/103872/ drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c index e4580d8f21e1..d124f34ab9fc 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c @@ -1006,7 +1006,8 @@ static bool vop_crtc_mode_fixup(struct drm_crtc *crtc, struct vop *vop = to_vop(crtc); adjusted_mode->clock = - clk_round_rate(vop->dclk, mode->clock * 1000) / 1000; + DIV_ROUND_UP(clk_round_rate(vop->dclk, mode->clock * 1000), + 1000); return true; }