From patchwork Mon Sep 13 16:40:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Kai Vehmanen X-Patchwork-Id: 12490181 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 61F00C433F5 for ; Mon, 13 Sep 2021 16:46:47 +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 0A34260F3A for ; Mon, 13 Sep 2021 16:46:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 0A34260F3A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.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 566646E1BD; Mon, 13 Sep 2021 16:46:46 +0000 (UTC) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by gabe.freedesktop.org (Postfix) with ESMTPS id 559AB6E1BD for ; Mon, 13 Sep 2021 16:46:45 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10106"; a="201905213" X-IronPort-AV: E=Sophos;i="5.85,290,1624345200"; d="scan'208";a="201905213" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Sep 2021 09:46:40 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.85,290,1624345200"; d="scan'208";a="515514025" Received: from eliteleevi.tm.intel.com ([10.237.54.20]) by orsmga001.jf.intel.com with ESMTP; 13 Sep 2021 09:46:38 -0700 From: Kai Vehmanen To: intel-gfx@lists.freedesktop.org Cc: uma.shankar@intel.com, ville.syrjala@linux.intel.com, jani.nikula@intel.com, Kai Vehmanen Date: Mon, 13 Sep 2021 19:40:04 +0300 Message-Id: <20210913164004.3999218-1-kai.vehmanen@linux.intel.com> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v2] drm/i915/display: program audio CDCLK-TS for keepalives 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" XE_LPD display adds support for display audio codec keepalive feature. This feature works also when display codec is in D3 state and the audio link is off (BCLK off). To enable this functionality, display driver must update the AUD_TS_CDCLK_M/N registers whenever CDCLK is changed. Actual timestamps are generated only when the audio codec driver specifically enables the KeepAlive (KAE) feature. This patch adds new hooks to intel_set_cdclk() in order to inform display audio driver when CDCLK change is started and when it is complete. Bspec: 53679 Signed-off-by: Kai Vehmanen Reviewed-by: Uma Shankar Acked-by: Ville Syrjälä --- drivers/gpu/drm/i915/display/intel_audio.c | 37 ++++++++++++++++++++++ drivers/gpu/drm/i915/display/intel_audio.h | 2 ++ drivers/gpu/drm/i915/display/intel_cdclk.c | 5 +++ drivers/gpu/drm/i915/i915_reg.h | 4 +++ 4 files changed, 48 insertions(+) Changes V1->V2: - addressed review comments Jani Nikula (Sep 10) - added an initial call to intel_audio_cdclk_change_post() so that AUD_CDCLK initial configuration is always performance diff --git a/drivers/gpu/drm/i915/display/intel_audio.c b/drivers/gpu/drm/i915/display/intel_audio.c index 532237588511..ff74dc4dc121 100644 --- a/drivers/gpu/drm/i915/display/intel_audio.c +++ b/drivers/gpu/drm/i915/display/intel_audio.c @@ -936,6 +936,40 @@ void intel_init_audio_hooks(struct drm_i915_private *dev_priv) } } +struct aud_ts_cdclk_m_n { + u8 m; + u16 n; +}; + +void intel_audio_cdclk_change_pre(struct drm_i915_private *i915) +{ + if (DISPLAY_VER(i915) >= 13) + intel_de_rmw(i915, AUD_TS_CDCLK_M, AUD_TS_CDCLK_M_EN, 0); +} + +static void get_aud_ts_cdclk_m_n(int refclk, int cdclk, struct aud_ts_cdclk_m_n *aud_ts) +{ + if (refclk == 24000) + aud_ts->m = 12; + else + aud_ts->m = 15; + + aud_ts->n = cdclk * aud_ts->m / 24000; +} + +void intel_audio_cdclk_change_post(struct drm_i915_private *i915) +{ + struct aud_ts_cdclk_m_n aud_ts; + + if (DISPLAY_VER(i915) >= 13) { + get_aud_ts_cdclk_m_n(i915->cdclk.hw.ref, i915->cdclk.hw.cdclk, &aud_ts); + + intel_de_write(i915, AUD_TS_CDCLK_N, aud_ts.n); + intel_de_write(i915, AUD_TS_CDCLK_M, aud_ts.m | AUD_TS_CDCLK_M_EN); + drm_dbg_kms(&i915->drm, "aud_ts_cdclk set to M=%u, N=%u\n", aud_ts.m, aud_ts.n); + } +} + static int glk_force_audio_cdclk_commit(struct intel_atomic_state *state, struct intel_crtc *crtc, bool enable) @@ -1318,6 +1352,9 @@ static void i915_audio_component_init(struct drm_i915_private *dev_priv) dev_priv->audio_freq_cntrl = aud_freq; } + /* init with current cdclk */ + intel_audio_cdclk_change_post(dev_priv); + dev_priv->audio_component_registered = true; } diff --git a/drivers/gpu/drm/i915/display/intel_audio.h b/drivers/gpu/drm/i915/display/intel_audio.h index a3657c7a7ba2..dcb259dd2da7 100644 --- a/drivers/gpu/drm/i915/display/intel_audio.h +++ b/drivers/gpu/drm/i915/display/intel_audio.h @@ -18,6 +18,8 @@ void intel_audio_codec_enable(struct intel_encoder *encoder, void intel_audio_codec_disable(struct intel_encoder *encoder, const struct intel_crtc_state *old_crtc_state, const struct drm_connector_state *old_conn_state); +void intel_audio_cdclk_change_pre(struct drm_i915_private *dev_priv); +void intel_audio_cdclk_change_post(struct drm_i915_private *dev_priv); void intel_audio_init(struct drm_i915_private *dev_priv); void intel_audio_deinit(struct drm_i915_private *dev_priv); diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c index 9aec17b33819..a1365f31142d 100644 --- a/drivers/gpu/drm/i915/display/intel_cdclk.c +++ b/drivers/gpu/drm/i915/display/intel_cdclk.c @@ -24,6 +24,7 @@ #include #include "intel_atomic.h" +#include "intel_audio.h" #include "intel_bw.h" #include "intel_cdclk.h" #include "intel_de.h" @@ -1943,6 +1944,8 @@ static void intel_set_cdclk(struct drm_i915_private *dev_priv, intel_psr_pause(intel_dp); } + intel_audio_cdclk_change_pre(dev_priv); + /* * Lock aux/gmbus while we change cdclk in case those * functions use cdclk. Not all platforms/ports do, @@ -1971,6 +1974,8 @@ static void intel_set_cdclk(struct drm_i915_private *dev_priv, intel_psr_resume(intel_dp); } + intel_audio_cdclk_change_post(dev_priv); + if (drm_WARN(&dev_priv->drm, intel_cdclk_changed(&dev_priv->cdclk.hw, cdclk_config), "cdclk state doesn't match!\n")) { diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index bd63760207b0..795775c9e2eb 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -9734,6 +9734,10 @@ enum { #define AUD_PIN_BUF_CTL _MMIO(0x48414) #define AUD_PIN_BUF_ENABLE REG_BIT(31) +#define AUD_TS_CDCLK_M _MMIO(0x65ea0) +#define AUD_TS_CDCLK_M_EN REG_BIT(31) +#define AUD_TS_CDCLK_N _MMIO(0x65ea4) + /* Display Audio Config Reg */ #define AUD_CONFIG_BE _MMIO(0x65ef0) #define HBLANK_EARLY_ENABLE_ICL(pipe) (0x1 << (20 - (pipe)))