From patchwork Fri Aug 30 12:45:29 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Manna, Animesh" X-Patchwork-Id: 11123889 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6D6331399 for ; Fri, 30 Aug 2019 12:53:28 +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 5743721874 for ; Fri, 30 Aug 2019 12:53:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5743721874 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id AA0E16E328; Fri, 30 Aug 2019 12:53:27 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by gabe.freedesktop.org (Postfix) with ESMTPS id 510C96E323 for ; Fri, 30 Aug 2019 12:53:26 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 30 Aug 2019 05:53:26 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,447,1559545200"; d="scan'208";a="198029818" Received: from amanna.iind.intel.com ([10.223.74.216]) by fmsmga001.fm.intel.com with ESMTP; 30 Aug 2019 05:53:24 -0700 From: Animesh Manna To: intel-gfx@lists.freedesktop.org Date: Fri, 30 Aug 2019 18:15:29 +0530 Message-Id: <20190830124533.26573-7-animesh.manna@intel.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190830124533.26573-1-animesh.manna@intel.com> References: <20190830124533.26573-1-animesh.manna@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v4 06/10] drm/i915/dsb: functions to enable/disable DSB engine. X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Michel Thierry , Jani Nikula Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" DSB will be used for performance improvement for some special scenario. DSB engine will be enabled based on need and after completion of its work will be disabled. Api added for enable/disable operation by using DSB_CTRL register. v1: Initial version. v2: POSTING_READ added after writing control register. (Shashank) Cc: Michel Thierry Cc: Jani Nikula Cc: Rodrigo Vivi Signed-off-by: Animesh Manna --- drivers/gpu/drm/i915/display/intel_dsb.c | 42 ++++++++++++++++++++++++ drivers/gpu/drm/i915/i915_reg.h | 1 + 2 files changed, 43 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c index 1022b5720d17..485748e63a94 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.c +++ b/drivers/gpu/drm/i915/display/intel_dsb.c @@ -26,6 +26,48 @@ static inline bool is_dsb_busy(struct intel_dsb *dsb) return DSB_STATUS & I915_READ(DSB_CTRL(pipe, dsb->id)); } +static inline bool intel_dsb_enable_engine(struct intel_dsb *dsb) +{ + struct intel_crtc *crtc = dsb->crtc; + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + enum pipe pipe = crtc->pipe; + u32 dsb_ctrl; + + dsb_ctrl = I915_READ(DSB_CTRL(pipe, dsb->id)); + + if (DSB_STATUS & dsb_ctrl) { + DRM_DEBUG_KMS("DSB engine is busy.\n"); + return false; + } + + dsb_ctrl |= DSB_ENABLE; + I915_WRITE(DSB_CTRL(pipe, dsb->id), dsb_ctrl); + + POSTING_READ(DSB_CTRL(pipe, dsb->id)); + return true; +} + +static inline bool intel_dsb_disable_engine(struct intel_dsb *dsb) +{ + struct intel_crtc *crtc = dsb->crtc; + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + enum pipe pipe = crtc->pipe; + u32 dsb_ctrl; + + dsb_ctrl = I915_READ(DSB_CTRL(pipe, dsb->id)); + + if (DSB_STATUS & dsb_ctrl) { + DRM_DEBUG_KMS("DSB engine is busy.\n"); + return false; + } + + dsb_ctrl &= ~DSB_ENABLE; + I915_WRITE(DSB_CTRL(pipe, dsb->id), dsb_ctrl); + + POSTING_READ(DSB_CTRL(pipe, dsb->id)); + return true; +} + struct intel_dsb * intel_dsb_get(struct intel_crtc *crtc) { diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 3e35d7a4d2c4..067f86d3a9de 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -11675,6 +11675,7 @@ enum skl_power_gate { #define DSBSL_INSTANCE(pipe, id) (_DSBSL_INSTANCE_BASE + \ (pipe) * 0x1000 + (id) * 100) #define DSB_CTRL(pipe, id) _MMIO(DSBSL_INSTANCE(pipe, id) + 0x8) +#define DSB_ENABLE (1 << 31) #define DSB_STATUS (1 << 0) #endif /* _I915_REG_H_ */