From patchwork Mon Oct 17 11:22:19 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Sharma, Shashank" X-Patchwork-Id: 9378957 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 05F16607D4 for ; Mon, 17 Oct 2016 11:11:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EC3F329099 for ; Mon, 17 Oct 2016 11:11:49 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E0CD129108; Mon, 17 Oct 2016 11:11:49 +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=-4.2 required=2.0 tests=BAYES_00, 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 CBF7329099 for ; Mon, 17 Oct 2016 11:11:48 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4D61E6E2FA; Mon, 17 Oct 2016 11:11:43 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8F95F6E2FA; Mon, 17 Oct 2016 11:11:42 +0000 (UTC) Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga101.jf.intel.com with ESMTP; 17 Oct 2016 04:11:42 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.31,357,1473145200"; d="scan'208";a="20327754" Received: from shashanks-desktop.iind.intel.com ([10.223.26.24]) by fmsmga006.fm.intel.com with ESMTP; 17 Oct 2016 04:11:40 -0700 From: Shashank Sharma To: dri-devel@lists.freedesktop.org, jim.bride@linux.intel.com Subject: [PATCH v3 1/4] drm/i915: Add lspcon resume function Date: Mon, 17 Oct 2016 16:52:19 +0530 Message-Id: <1476703342-7950-2-git-send-email-shashank.sharma@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1476703342-7950-1-git-send-email-shashank.sharma@intel.com> References: <1476703342-7950-1-git-send-email-shashank.sharma@intel.com> Cc: daniel.vetter@intel.com, intel-gfx@lists.freedesktop.org X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP As per the software design, we are driving lspcon in PCON mode. But while resuming from suspend, lspcon can go in LS mode (which is its default operating mode on power on) This patch adds a resume function for lspcon, which makes sure its operating in PCON mode, post resume. V2: Address review comments from Imre - move lspcon_resume call to encoder->reset() - use early returns Signed-off-by: Shashank Sharma --- drivers/gpu/drm/i915/intel_dp.c | 7 ++++++- drivers/gpu/drm/i915/intel_drv.h | 1 + drivers/gpu/drm/i915/intel_lspcon.c | 8 ++++++++ 3 files changed, 15 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index bc03f61..25f4060 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -4755,11 +4755,16 @@ static void intel_edp_panel_vdd_sanitize(struct intel_dp *intel_dp) void intel_dp_encoder_reset(struct drm_encoder *encoder) { struct drm_i915_private *dev_priv = to_i915(encoder->dev); - struct intel_dp *intel_dp = enc_to_intel_dp(encoder); + struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder); + struct intel_lspcon *lspcon = &intel_dig_port->lspcon; + struct intel_dp *intel_dp = &intel_dig_port->dp; if (!HAS_DDI(dev_priv)) intel_dp->DP = I915_READ(intel_dp->output_reg); + if (IS_GEN9(dev_priv) && lspcon->active) + lspcon_resume(lspcon); + if (to_intel_encoder(encoder)->type != INTEL_OUTPUT_EDP) return; diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index cde05ff..ea43512 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -1856,4 +1856,5 @@ void intel_color_load_luts(struct drm_crtc_state *crtc_state); /* intel_lspcon.c */ bool lspcon_init(struct intel_digital_port *intel_dig_port); +void lspcon_resume(struct intel_lspcon *lspcon); #endif /* __INTEL_DRV_H__ */ diff --git a/drivers/gpu/drm/i915/intel_lspcon.c b/drivers/gpu/drm/i915/intel_lspcon.c index 628ae6fb..d606f1a 100644 --- a/drivers/gpu/drm/i915/intel_lspcon.c +++ b/drivers/gpu/drm/i915/intel_lspcon.c @@ -89,6 +89,14 @@ static bool lspcon_probe(struct intel_lspcon *lspcon) return true; } +void lspcon_resume(struct intel_lspcon *lspcon) +{ + if (lspcon_change_mode(lspcon, DRM_LSPCON_MODE_PCON, true)) + DRM_ERROR("LSPCON resume failed\n"); + else + DRM_DEBUG_KMS("LSPCON resume success\n"); +} + bool lspcon_init(struct intel_digital_port *intel_dig_port) { struct intel_dp *dp = &intel_dig_port->dp;