From patchwork Fri May 10 09:38:18 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Hogander, Jouni" X-Patchwork-Id: 13661194 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id A1FF7C25B10 for ; Fri, 10 May 2024 09:38:55 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F173610E852; Fri, 10 May 2024 09:38:54 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="HhtomuZd"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8D4CF10E849 for ; Fri, 10 May 2024 09:38:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1715333934; x=1746869934; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=VBqGQ2Ymncvqk/TCMls4DMjNm92HwTtpMkdFcO9lPp4=; b=HhtomuZdCEfhZUc52lRIDDvls4RgjkwbmAb3B9WEU4QP2upnGh/PhBs/ buWBZVP4qBexqqNBgmfzzmQB0jy14TrNeex+PBnyeZiiE5rVPdFc3AApb sRM6N5heesygWNpIhYLiv6AhE6MejCCf/lyfhYeuuuC9KCsIaTDQ6747I M/I9WpMfwt+LFOk+hsYpM1fQlmhst1Ks+6BEqqM0cuV4mlqQlMSLQW74v X+f5e3ja7wEeHgYIvvCYEku/Gjt36CchaVykqiFn7PMKH/fqlklPuonY6 tk3YwgbF586MjuL7ip0C6v4NFFXIEUpbtr4G7h0IAzsOZrmgfOxmOLeTU w==; X-CSE-ConnectionGUID: 8p4cxQPkQT+fZFGmXu2CvA== X-CSE-MsgGUID: GPfp1hqBS+uUuiZMWQLFvg== X-IronPort-AV: E=McAfee;i="6600,9927,11068"; a="36684702" X-IronPort-AV: E=Sophos;i="6.08,150,1712646000"; d="scan'208";a="36684702" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 May 2024 02:38:54 -0700 X-CSE-ConnectionGUID: i22XGMjlRN2gQZqnFAlIXw== X-CSE-MsgGUID: l6TAjx72Sr+seQCFyPM8gA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,150,1712646000"; d="scan'208";a="34075547" Received: from dlazzaro-mobl1.ger.corp.intel.com (HELO jhogande-mobl1.intel.com) ([10.252.51.148]) by fmviesa003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 May 2024 02:38:52 -0700 From: =?utf-8?q?Jouni_H=C3=B6gander?= To: intel-gfx@lists.freedesktop.org Cc: animesh.manna@intel.com, =?utf-8?q?Jouni_H=C3=B6gander?= Subject: [PATCH v10 07/12] drm/i915/psr: Modify intel_dp_get_su_granularity to support panel replay Date: Fri, 10 May 2024 12:38:18 +0300 Message-Id: <20240510093823.3146455-8-jouni.hogander@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240510093823.3146455-1-jouni.hogander@intel.com> References: <20240510093823.3146455-1-jouni.hogander@intel.com> MIME-Version: 1.0 Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo 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" Currently intel_dp_get_su_granularity doesn't support panel replay. This fix modifies it to support panel replay as well. v4: - use drm_dp_dpcd_readb instead of drm_dp_dpcd_read - ensure return value is 0 if drm_dp_dpcd_readb fails v3: use correct offset for DP_PANEL_PANEL_REPLAY_CAPABILITY v2: rely on PSR definitions on common bits Signed-off-by: Jouni Högander Reviewed-by: Animesh Manna --- drivers/gpu/drm/i915/display/intel_psr.c | 62 +++++++++++++++++++++--- 1 file changed, 55 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c index 0a5ce29f09d1..6d1f442f3d14 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.c +++ b/drivers/gpu/drm/i915/display/intel_psr.c @@ -468,6 +468,40 @@ static u8 intel_dp_get_sink_sync_latency(struct intel_dp *intel_dp) return val; } +static u8 intel_dp_get_su_capability(struct intel_dp *intel_dp) +{ + u8 su_capability = 0; + + if (intel_dp->psr.sink_panel_replay_su_support) + drm_dp_dpcd_readb(&intel_dp->aux, + DP_PANEL_PANEL_REPLAY_CAPABILITY, + &su_capability); + else + su_capability = intel_dp->psr_dpcd[1]; + + return su_capability; +} + +static unsigned int +intel_dp_get_su_x_granularity_offset(struct intel_dp *intel_dp) +{ + return intel_dp->psr.sink_panel_replay_su_support ? + DP_PANEL_PANEL_REPLAY_X_GRANULARITY : + DP_PSR2_SU_X_GRANULARITY; +} + +static unsigned int +intel_dp_get_su_y_granularity_offset(struct intel_dp *intel_dp) +{ + return intel_dp->psr.sink_panel_replay_su_support ? + DP_PANEL_PANEL_REPLAY_Y_GRANULARITY : + DP_PSR2_SU_Y_GRANULARITY; +} + +/* + * Note: Bits related to granularity are same in panel replay and psr + * registers. Rely on PSR definitions on these "common" bits. + */ static void intel_dp_get_su_granularity(struct intel_dp *intel_dp) { struct drm_i915_private *i915 = dp_to_i915(intel_dp); @@ -475,18 +509,29 @@ static void intel_dp_get_su_granularity(struct intel_dp *intel_dp) u16 w; u8 y; - /* If sink don't have specific granularity requirements set legacy ones */ - if (!(intel_dp->psr_dpcd[1] & DP_PSR2_SU_GRANULARITY_REQUIRED)) { + /* + * TODO: Do we need to take into account panel supporting both PSR and + * Panel replay? + */ + + /* + * If sink don't have specific granularity requirements set legacy + * ones. + */ + if (!(intel_dp_get_su_capability(intel_dp) & + DP_PSR2_SU_GRANULARITY_REQUIRED)) { /* As PSR2 HW sends full lines, we do not care about x granularity */ w = 4; y = 4; goto exit; } - r = drm_dp_dpcd_read(&intel_dp->aux, DP_PSR2_SU_X_GRANULARITY, &w, 2); + r = drm_dp_dpcd_read(&intel_dp->aux, + intel_dp_get_su_x_granularity_offset(intel_dp), + &w, 2); if (r != 2) drm_dbg_kms(&i915->drm, - "Unable to read DP_PSR2_SU_X_GRANULARITY\n"); + "Unable to read selective update x granularity\n"); /* * Spec says that if the value read is 0 the default granularity should * be used instead. @@ -494,10 +539,12 @@ static void intel_dp_get_su_granularity(struct intel_dp *intel_dp) if (r != 2 || w == 0) w = 4; - r = drm_dp_dpcd_read(&intel_dp->aux, DP_PSR2_SU_Y_GRANULARITY, &y, 1); + r = drm_dp_dpcd_read(&intel_dp->aux, + intel_dp_get_su_y_granularity_offset(intel_dp), + &y, 1); if (r != 1) { drm_dbg_kms(&i915->drm, - "Unable to read DP_PSR2_SU_Y_GRANULARITY\n"); + "Unable to read selective update y granularity\n"); y = 4; } if (y == 0) @@ -590,7 +637,8 @@ void intel_psr_init_dpcd(struct intel_dp *intel_dp) if (intel_dp->psr_dpcd[0]) _psr_init_dpcd(intel_dp); - if (intel_dp->psr.sink_psr2_support) + if (intel_dp->psr.sink_psr2_support || + intel_dp->psr.sink_panel_replay_su_support) intel_dp_get_su_granularity(intel_dp); }