From patchwork Tue Sep 12 04:48:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas De Marchi X-Patchwork-Id: 13380632 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 4F575CA0EC3 for ; Tue, 12 Sep 2023 04:49:00 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 349FC10E36E; Tue, 12 Sep 2023 04:48:45 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2631C10E35B; Tue, 12 Sep 2023 04:48:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1694494116; x=1726030116; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=hClkUmKNtPwN+1T8/LZ1sd9IsLmMBSP6cw8gCzsPxPs=; b=feKTFHY29KLoDeFRPbElgbk5qoPhoth0vsJNhgeEJez+B/XXrCofz63G v8ajb7GV1AvNz2V1WBh+pIRjLrxbiQWdDYGAH0lh5Xj5C8DeqElxnZb8K Zg7zsFJM6SaAfof0NARorH6Sytn9LNzOqkSM3959paL8nFhSlcei6u1C4 /tT2JkaUWLX3DSH+ZhSqwxXrr3d95z3CYgdBrBniAZvDNBBR/rmL0QVLZ c1OlWrpiR8Bsmk7zQ7g7VevMkphtmasrH7RCYo7m+6BAdirrbHqZulob5 y7ew9kXChwIFP1GRTUTHl5s6sTuAedl4ZVtLMln3QeEKI5p2TRT/iJFs8 A==; X-IronPort-AV: E=McAfee;i="6600,9927,10830"; a="378182336" X-IronPort-AV: E=Sophos;i="6.02,245,1688454000"; d="scan'208";a="378182336" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Sep 2023 21:48:36 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10830"; a="1074419965" X-IronPort-AV: E=Sophos;i="6.02,245,1688454000"; d="scan'208";a="1074419965" Received: from lucas-s2600cw.jf.intel.com ([10.165.21.196]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Sep 2023 21:48:35 -0700 From: Lucas De Marchi To: intel-xe@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Date: Mon, 11 Sep 2023 21:48:27 -0700 Message-Id: <20230912044837.1672060-20-lucas.demarchi@intel.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230912044837.1672060-1-lucas.demarchi@intel.com> References: <20230912044837.1672060-1-lucas.demarchi@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v3 19/29] drm/i915/xe2lpd: Read pin assignment from IOM 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: , Cc: Lucas De Marchi , Matt Roper , Luca Coelho Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Luca Coelho Starting from display version 20, we need to read the pin assignment from the IOM TCSS_DDI_STATUS register instead of reading it from the FIA. We use the pin assignment to decide the maximum lane count. So, to support this change, add a new lnl_tc_port_get_max_lane_count() function that reads from the TCSS_DDI_STATUS register and decides the maximum lane count based on that. BSpec: 69594 Cc: Mika Kahola Signed-off-by: Luca Coelho Reviewed-by: Matt Roper Reviewed-by: Mika Kahola Signed-off-by: Lucas De Marchi --- drivers/gpu/drm/i915/display/intel_tc.c | 28 +++++++++++++++++++++++++ drivers/gpu/drm/i915/i915_reg.h | 1 + 2 files changed, 29 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_tc.c b/drivers/gpu/drm/i915/display/intel_tc.c index 678693978892..e9ced251c170 100644 --- a/drivers/gpu/drm/i915/display/intel_tc.c +++ b/drivers/gpu/drm/i915/display/intel_tc.c @@ -290,6 +290,31 @@ u32 intel_tc_port_get_pin_assignment_mask(struct intel_digital_port *dig_port) DP_PIN_ASSIGNMENT_SHIFT(tc->phy_fia_idx); } +static int lnl_tc_port_get_max_lane_count(struct intel_digital_port *dig_port) +{ + struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); + enum tc_port tc_port = intel_port_to_tc(i915, dig_port->base.port); + intel_wakeref_t wakeref; + u32 val, pin_assignment; + + with_intel_display_power(i915, POWER_DOMAIN_DISPLAY_CORE, wakeref) + val = intel_de_read(i915, TCSS_DDI_STATUS(tc_port)); + + pin_assignment = + REG_FIELD_GET(TCSS_DDI_STATUS_PIN_ASSIGNMENT_MASK, val); + + switch (pin_assignment) { + default: + MISSING_CASE(pin_assignment); + fallthrough; + case DP_PIN_ASSIGNMENT_D: + return 2; + case DP_PIN_ASSIGNMENT_C: + case DP_PIN_ASSIGNMENT_E: + return 4; + } +} + static int mtl_tc_port_get_max_lane_count(struct intel_digital_port *dig_port) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); @@ -348,6 +373,9 @@ int intel_tc_port_max_lane_count(struct intel_digital_port *dig_port) assert_tc_cold_blocked(tc); + if (DISPLAY_VER(i915) >= 20) + return lnl_tc_port_get_max_lane_count(dig_port); + if (DISPLAY_VER(i915) >= 14) return mtl_tc_port_get_max_lane_count(dig_port); diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 2f115d339913..efcf1461988f 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -6351,6 +6351,7 @@ enum skl_power_gate { #define TCSS_DDI_STATUS(tc) _MMIO(_PICK_EVEN(tc, \ _TCSS_DDI_STATUS_1, \ _TCSS_DDI_STATUS_2)) +#define TCSS_DDI_STATUS_PIN_ASSIGNMENT_MASK REG_GENMASK(28, 25) #define TCSS_DDI_STATUS_READY REG_BIT(2) #define TCSS_DDI_STATUS_HPD_LIVE_STATUS_TBT REG_BIT(1) #define TCSS_DDI_STATUS_HPD_LIVE_STATUS_ALT REG_BIT(0)