From patchwork Fri Nov 19 13:13:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Kahola, Mika" X-Patchwork-Id: 12628823 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 73FF1C433EF for ; Fri, 19 Nov 2021 13:14:42 +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 3CC1361221 for ; Fri, 19 Nov 2021 13:14:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 3CC1361221 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DA4BE6F8C7; Fri, 19 Nov 2021 13:14:41 +0000 (UTC) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by gabe.freedesktop.org (Postfix) with ESMTPS id 44D6C6F5BA for ; Fri, 19 Nov 2021 13:14:38 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10172"; a="215124506" X-IronPort-AV: E=Sophos;i="5.87,247,1631602800"; d="scan'208";a="215124506" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Nov 2021 05:14:38 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.87,247,1631602800"; d="scan'208";a="507894083" Received: from sorvi2.fi.intel.com ([10.237.72.194]) by orsmga008.jf.intel.com with ESMTP; 19 Nov 2021 05:14:36 -0800 From: Mika Kahola To: intel-gfx@lists.freedesktop.org Date: Fri, 19 Nov 2021 15:13:48 +0200 Message-Id: <20211119131348.725220-6-mika.kahola@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20211119131348.725220-1-mika.kahola@intel.com> References: <20211119131348.725220-1-mika.kahola@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v2 5/5] drm/i915: Allow cdclk squasher to be reconfigured live X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Ville Syrjälä Supposedly we should be able to change the cdclk squasher waveform even when many pipes are active. Make it so. Signed-off-by: Ville Syrjälä Reviewed-by: Mika Kahola --- drivers/gpu/drm/i915/display/intel_cdclk.c | 40 ++++++++++++++++++++-- 1 file changed, 37 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c index 5fcb393079f7..075ad6055765 100644 --- a/drivers/gpu/drm/i915/display/intel_cdclk.c +++ b/drivers/gpu/drm/i915/display/intel_cdclk.c @@ -1951,6 +1951,25 @@ static bool intel_cdclk_can_crawl(struct drm_i915_private *dev_priv, a->ref == b->ref; } +static bool intel_cdclk_can_squash(struct drm_i915_private *dev_priv, + const struct intel_cdclk_config *a, + const struct intel_cdclk_config *b) +{ + /* + * FIXME should store a bit more state in intel_cdclk_config + * to differentiate squasher vs. cd2x divider properly. For + * the moment all platforms with squasher use a fixed cd2x + * divider. + */ + if (!has_cdclk_squasher(dev_priv)) + return false; + + return a->cdclk != b->cdclk && + a->vco != 0 && + a->vco == b->vco && + a->ref == b->ref; +} + /** * intel_cdclk_needs_modeset - Determine if changong between the CDCLK * configurations requires a modeset on all pipes @@ -1988,7 +2007,17 @@ static bool intel_cdclk_can_cd2x_update(struct drm_i915_private *dev_priv, if (DISPLAY_VER(dev_priv) < 10 && !IS_BROXTON(dev_priv)) return false; + /* + * FIXME should store a bit more state in intel_cdclk_config + * to differentiate squasher vs. cd2x divider properly. For + * the moment all platforms with squasher use a fixed cd2x + * divider. + */ + if (has_cdclk_squasher(dev_priv)) + return false; + return a->cdclk != b->cdclk && + a->vco != 0 && a->vco == b->vco && a->ref == b->ref; } @@ -2672,9 +2701,14 @@ int intel_modeset_calc_cdclk(struct intel_atomic_state *state) pipe = INVALID_PIPE; } - if (intel_cdclk_can_crawl(dev_priv, - &old_cdclk_state->actual, - &new_cdclk_state->actual)) { + if (intel_cdclk_can_squash(dev_priv, + &old_cdclk_state->actual, + &new_cdclk_state->actual)) { + drm_dbg_kms(&dev_priv->drm, + "Can change cdclk via squasher\n"); + } else if (intel_cdclk_can_crawl(dev_priv, + &old_cdclk_state->actual, + &new_cdclk_state->actual)) { drm_dbg_kms(&dev_priv->drm, "Can change cdclk via crawl\n"); } else if (pipe != INVALID_PIPE) {