From patchwork Wed Aug 12 15:44:16 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Ville Syrjala X-Patchwork-Id: 7002861 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id B53509F358 for ; Wed, 12 Aug 2015 15:45:01 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D8AF6206CE for ; Wed, 12 Aug 2015 15:45:00 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id F08972055C for ; Wed, 12 Aug 2015 15:44:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6E07F6E5CA; Wed, 12 Aug 2015 08:44:59 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTP id 53C776E5CA for ; Wed, 12 Aug 2015 08:44:58 -0700 (PDT) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga103.fm.intel.com with ESMTP; 12 Aug 2015 08:44:58 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,662,1432623600"; d="scan'208";a="782144525" Received: from stinkbox.fi.intel.com (HELO stinkbox) ([10.237.72.88]) by fmsmga002.fm.intel.com with SMTP; 12 Aug 2015 08:44:56 -0700 Received: by stinkbox (sSMTP sendmail emulation); Wed, 12 Aug 2015 18:44:42 +0300 From: ville.syrjala@linux.intel.com To: intel-gfx@lists.freedesktop.org Date: Wed, 12 Aug 2015 18:44:16 +0300 Message-Id: <1439394260-15137-8-git-send-email-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 2.4.6 In-Reply-To: <1439394260-15137-1-git-send-email-ville.syrjala@linux.intel.com> References: <1439394260-15137-1-git-send-email-ville.syrjala@linux.intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 07/11] drm/i915: Add port A HPD support for ILK/SNB X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 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" X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Ville Syrjälä ILK/SNB support port A HPD. While HPD is optional on eDP let's at least try to wite it up so that we might notice if the link has issues. The eDP spec suggests that if HPD is not wired up, one should poll the link status instead. We don't even do that currently. Signed-off-by: Ville Syrjälä Reviewed-by: Paulo Zanoni --- drivers/gpu/drm/i915/i915_irq.c | 59 ++++++++++++++++++++++++++++++++++++++--- 1 file changed, 56 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index e2485bd..152be8b 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -45,6 +45,10 @@ * and related files, but that will be described in separate chapters. */ +static const u32 hpd_ilk[HPD_NUM_PINS] = { + [HPD_PORT_A] = DE_DP_A_HOTPLUG, +}; + static const u32 hpd_ibx[HPD_NUM_PINS] = { [HPD_CRT] = SDE_CRT_HOTPLUG, [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG, @@ -1270,6 +1274,16 @@ static bool spt_port_hotplug2_long_detect(enum port port, u32 val) } } +static bool ilk_port_hotplug_long_detect(enum port port, u32 val) +{ + switch (port) { + case PORT_A: + return val & DIGITAL_PORTA_HOTPLUG_LONG_DETECT; + default: + return false; + } +} + static bool pch_port_hotplug_long_detect(enum port port, u32 val) { switch (port) { @@ -1864,6 +1878,19 @@ static void ilk_display_irq_handler(struct drm_device *dev, u32 de_iir) { struct drm_i915_private *dev_priv = dev->dev_private; enum pipe pipe; + u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG; + + if (hotplug_trigger) { + u32 dig_hotplug_reg, pin_mask, long_mask; + + dig_hotplug_reg = I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL); + I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL, dig_hotplug_reg); + + intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger, + dig_hotplug_reg, hpd_ilk, + ilk_port_hotplug_long_detect); + intel_hpd_irq_handler(dev, pin_mask, long_mask); + } if (de_iir & DE_AUX_CHANNEL_A) dp_aux_irq_handler(dev); @@ -3105,6 +3132,28 @@ static void spt_hpd_irq_setup(struct drm_device *dev) I915_WRITE(PCH_PORT_HOTPLUG2, hotplug); } +static void ilk_hpd_irq_setup(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + u32 hotplug_irqs, hotplug, enabled_irqs; + + hotplug_irqs = DE_DP_A_HOTPLUG; + enabled_irqs = intel_hpd_enabled_irqs(dev, hpd_ilk); + + ilk_update_display_irq(dev_priv, hotplug_irqs, enabled_irqs); + + /* + * Enable digital hotplug on the CPU, and configure the DP short pulse + * duration to 2ms (which is the minimum in the Display Port spec) + */ + hotplug = I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL); + hotplug &= ~DIGITAL_PORTA_PULSE_DURATION_MASK; + hotplug |= DIGITAL_PORTA_HOTPLUG_ENABLE | DIGITAL_PORTA_PULSE_DURATION_2ms; + I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL, hotplug); + + ibx_hpd_irq_setup(dev); +} + static void bxt_hpd_irq_setup(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -3203,8 +3252,9 @@ static int ironlake_irq_postinstall(struct drm_device *dev) DE_AUX_CHANNEL_A | DE_PIPEB_CRC_DONE | DE_PIPEA_CRC_DONE | DE_POISON); - extra_mask = DE_PIPEA_VBLANK | DE_PIPEB_VBLANK | DE_PCU_EVENT | - DE_PIPEB_FIFO_UNDERRUN | DE_PIPEA_FIFO_UNDERRUN; + extra_mask = (DE_PIPEA_VBLANK | DE_PIPEB_VBLANK | DE_PCU_EVENT | + DE_PIPEB_FIFO_UNDERRUN | DE_PIPEA_FIFO_UNDERRUN | + DE_DP_A_HOTPLUG); } dev_priv->irq_mask = ~display_mask; @@ -4220,7 +4270,10 @@ void intel_irq_init(struct drm_i915_private *dev_priv) dev->driver->irq_uninstall = ironlake_irq_uninstall; dev->driver->enable_vblank = ironlake_enable_vblank; dev->driver->disable_vblank = ironlake_disable_vblank; - dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup; + if (INTEL_INFO(dev)->gen >= 7) + dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup; + else + dev_priv->display.hpd_irq_setup = ilk_hpd_irq_setup; } else { if (INTEL_INFO(dev_priv)->gen == 2) { dev->driver->irq_preinstall = i8xx_irq_preinstall;