From patchwork Mon Aug 23 03:21:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kulkarni, Vandita" X-Patchwork-Id: 12451893 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9B07DC4338F for ; Mon, 23 Aug 2021 03:21:27 +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 588476127B for ; Mon, 23 Aug 2021 03:21:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 588476127B 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 A7BD689E7C; Mon, 23 Aug 2021 03:21:24 +0000 (UTC) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id EC25E89B7D for ; Mon, 23 Aug 2021 03:21:22 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10084"; a="239159305" X-IronPort-AV: E=Sophos;i="5.84,343,1620716400"; d="scan'208";a="239159305" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Aug 2021 20:21:22 -0700 X-IronPort-AV: E=Sophos;i="5.84,343,1620716400"; d="scan'208";a="514550806" Received: from unknown (HELO vandita-Z390-AORUS-ULTRA.iind.intel.com) ([10.190.238.8]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Aug 2021 20:21:21 -0700 From: Vandita Kulkarni To: intel-gfx@lists.freedesktop.org Cc: jani.nikula@intel.com, Vandita Kulkarni Date: Mon, 23 Aug 2021 08:51:35 +0530 Message-Id: <20210823032136.2564-2-vandita.kulkarni@intel.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210823032136.2564-1-vandita.kulkarni@intel.com> References: <20210823032136.2564-1-vandita.kulkarni@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 1/2] drm/i915/dsi/xelpd: Add WA to program LP to HS wakeup guardband 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" Wa_16012360555 SW will have to program the "LP to HS Wakeup Guardband" field to account for the repeaters on the HS Request/Ready PPI signaling between the Display engine and the DPHY. Signed-off-by: Vandita Kulkarni Reported-by: kernel test robot Reported-by: kernel test robot Reported-by: kernel test robot --- drivers/gpu/drm/i915/display/icl_dsi.c | 24 ++++++++++++++++++++++++ drivers/gpu/drm/i915/i915_reg.h | 8 ++++++++ 2 files changed, 32 insertions(+) diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c index 43ec7fcd3f5d..61aea695c565 100644 --- a/drivers/gpu/drm/i915/display/icl_dsi.c +++ b/drivers/gpu/drm/i915/display/icl_dsi.c @@ -1270,6 +1270,27 @@ static void icl_apply_kvmr_pipe_a_wa(struct intel_encoder *encoder, IGNORE_KVMR_PIPE_A, enable ? IGNORE_KVMR_PIPE_A : 0); } + +/* + * Wa_16012360555:ADLP + * SW will have to program the "LP to HS Wakeup Guardband" + * field (bits 15:12) of register offset 0x6B0C0 (DSI0) + * and 0x6B8C0 (DSI1) to a value of 4 to account for the repeaters + * on the HS Request/Ready PPI signaling between + * the Display engine and the DPHY. + */ +static void adlp_set_lp_hs_wakeup_gb(struct intel_encoder *encoder) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder); + enum port port; + + if (DISPLAY_VER(dev_priv) == 13) + for_each_dsi_port(port, intel_dsi->ports) + intel_de_rmw(dev_priv, TGL_DSI_CHKN_REG(port), + TGL_DSI_CHKN_LSHS_GB, 0x4); +} + static void gen11_dsi_enable(struct intel_atomic_state *state, struct intel_encoder *encoder, const struct intel_crtc_state *crtc_state, @@ -1283,6 +1304,9 @@ static void gen11_dsi_enable(struct intel_atomic_state *state, /* Wa_1409054076:icl,jsl,ehl */ icl_apply_kvmr_pipe_a_wa(encoder, crtc->pipe, true); + /* Wa_16012360555: adlp */ + adlp_set_lp_hs_wakeup_gb(encoder); + /* step6d: enable dsi transcoder */ gen11_dsi_enable_transcoder(encoder); diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 72dd3a6d205d..34ad288de748 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -11614,6 +11614,14 @@ enum skl_power_gate { _ICL_DSI_IO_MODECTL_1) #define COMBO_PHY_MODE_DSI (1 << 0) +/* TGL DSI Chicken register */ +#define TGL_DSI_CHKN_REG_0 0x6B0C0 +#define TGL_DSI_CHKN_REG_1 0x6B8C0 +#define TGL_DSI_CHKN_REG(port) _MMIO_PORT(port, \ + _TGL_DSI_CHKN_REG_0, \ + _TGL_DSI_CHKN_REG_1) +#define TGL_DSI_CHKN_LSHS_GB (0xF << 12) + /* Display Stream Splitter Control */ #define DSS_CTL1 _MMIO(0x67400) #define SPLITTER_ENABLE (1 << 31)