From patchwork Wed Dec 12 16:15:49 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= X-Patchwork-Id: 1868471 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by patchwork2.kernel.org (Postfix) with ESMTP id 6E522DF266 for ; Wed, 12 Dec 2012 17:03:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6D6B3E6575 for ; Wed, 12 Dec 2012 09:03:59 -0800 (PST) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTP id E6FBCE5DD7; Wed, 12 Dec 2012 08:18:35 -0800 (PST) Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga102.jf.intel.com with ESMTP; 12 Dec 2012 08:17:45 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,267,1355126400"; d="scan'208";a="256477222" Received: from stinkbox.fi.intel.com (HELO stinkbox) ([10.237.72.168]) by orsmga002.jf.intel.com with SMTP; 12 Dec 2012 08:18:16 -0800 Received: by stinkbox (sSMTP sendmail emulation); Wed, 12 Dec 2012 18:18:16 +0200 From: ville.syrjala@linux.intel.com To: dri-devel@lists.freedesktop.org Subject: [PATCH 22/81] drm/i915: Add intel_check_clock() Date: Wed, 12 Dec 2012 18:15:49 +0200 Message-Id: <1355329008-31459-23-git-send-email-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 1.7.8.6 In-Reply-To: <1355329008-31459-1-git-send-email-ville.syrjala@linux.intel.com> References: <1355329008-31459-1-git-send-email-ville.syrjala@linux.intel.com> MIME-Version: 1.0 Cc: intel-gfx@lists.freedesktop.org X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces+patchwork-dri-devel=patchwork.kernel.org@lists.freedesktop.org Errors-To: dri-devel-bounces+patchwork-dri-devel=patchwork.kernel.org@lists.freedesktop.org From: Ville Syrjälä intel_check_clock() can be used to check clock validity w/o modifying hardware state. Signed-off-by: Ville Syrjälä --- drivers/gpu/drm/i915/i915_drv.h | 2 ++ drivers/gpu/drm/i915/intel_display.c | 34 ++++++++++++++++++++++++++++++++++ 2 files changed, 36 insertions(+), 0 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index ab0bd29..c41982e 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1719,6 +1719,8 @@ extern bool intel_fbc_enabled(struct drm_device *dev); extern void intel_disable_fbc(struct drm_device *dev); extern bool ironlake_set_drps(struct drm_device *dev, u8 val); extern void intel_init_pch_refclk(struct drm_device *dev); +extern int intel_check_clock(struct drm_crtc *crtc, + const struct drm_display_mode *adjusted_mode); extern void gen6_set_rps(struct drm_device *dev, u8 val); extern void intel_detect_pch(struct drm_device *dev); extern int intel_trans_dp_port_sel(struct drm_crtc *crtc); diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 2a2c664..dcd61fb 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -5686,6 +5686,40 @@ static int haswell_crtc_mode_set(struct drm_crtc *crtc, return ret; } +int intel_check_clock(struct drm_crtc *crtc, + const struct drm_display_mode *adjusted_mode) +{ + struct drm_device *dev = crtc->dev; + intel_clock_t clock, reduced_clock; + bool has_reduced_clock = false; + bool ok; + + if (IS_HASWELL(dev)) { + if (!intel_ddi_pll_mode_set(crtc, adjusted_mode->clock)) + return -EINVAL; + + if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) { + ok = ironlake_compute_clocks(crtc, adjusted_mode, &clock, + &has_reduced_clock, + &reduced_clock); + } else + ok = true; + } else if (HAS_PCH_SPLIT(dev)) { + ok = ironlake_compute_clocks(crtc, adjusted_mode, &clock, + &has_reduced_clock, &reduced_clock); + } else { + int num_connectors = 0; + bool is_dp = false; + int refclk; + + ok = i9xx_compute_clocks(crtc, adjusted_mode, &clock, + &has_reduced_clock, &reduced_clock, + &refclk, &num_connectors, &is_dp); + } + + return ok ? 0 : -EINVAL; +} + static int intel_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode,