From patchwork Mon Nov 18 15:14:53 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jani Nikula X-Patchwork-Id: 13878765 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 263BDD49232 for ; Mon, 18 Nov 2024 15:15:15 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 66E2210E50D; Mon, 18 Nov 2024 15:15:14 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="X9z3Z/um"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.14]) by gabe.freedesktop.org (Postfix) with ESMTPS id DE0D710E50C; Mon, 18 Nov 2024 15:15:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1731942913; x=1763478913; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=SNtr0/1UvnN+H5Z3qBusgfxCUOPk+agIa4Ir9GUEOWw=; b=X9z3Z/umvSKAPjTrIOLdeBootwgzpipwk8070HgqlLzALOUVVo1E4his 7SVXGeYZ/2AIVsNdX+smAherpTRRNFS6ZBEo2+QHmNl9QhYrTKTVWglBF wYgOB/jx03GOa8IeSzlTY0aQ/kd/RkI1FFI1O/XOJfaGE+0EXzP7ZHUqd hLThKbcChKywMX/z2U1EPMdarbotIcrmjQ4Od/BoAjpcU30d+04/U4f/P 95vBjGx1HBYjgZbVIF/bh6L1oC1+gqnRQpJxK29XRkskrt/K6WZ2zAaMo 8jldI/Fz7PxkWwdn+AfGqyKhbLVKYmO/gR3NEa/EKF/7Qcr6V4WxvCmwZ Q==; X-CSE-ConnectionGUID: 3A5fx4T7RwK8GO0RV3BtOw== X-CSE-MsgGUID: UiZtS/YSRXqJugUOvS/HbA== X-IronPort-AV: E=McAfee;i="6700,10204,11260"; a="32139262" X-IronPort-AV: E=Sophos;i="6.12,164,1728975600"; d="scan'208";a="32139262" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by fmvoesa108.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Nov 2024 07:15:13 -0800 X-CSE-ConnectionGUID: whRcMqmMQvGl+fCZuK8R7Q== X-CSE-MsgGUID: F17E2XShTV6kMzUNIOwFRw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,164,1728975600"; d="scan'208";a="89040842" Received: from jkrzyszt-mobl2.ger.corp.intel.com (HELO localhost) ([10.245.246.148]) by fmviesa007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Nov 2024 07:15:10 -0800 From: Jani Nikula To: dri-devel@lists.freedesktop.org Cc: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, jani.nikula@intel.com, imre.deak@intel.com Subject: [PATCH 2/3] drm/dp: extract drm_dp_dpcd_write_payload() Date: Mon, 18 Nov 2024 17:14:53 +0200 Message-Id: <6ce384b33eb6cb1d78731ea2c0e4da2340835325.1731942780.git.jani.nikula@intel.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: References: 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" SST with 128b/132b channel coding needs this too. Extract to a separate helper, independent of MST. Signed-off-by: Jani Nikula --- drivers/gpu/drm/display/drm_dp_helper.c | 56 +++++++++++++++++++ drivers/gpu/drm/display/drm_dp_mst_topology.c | 52 +---------------- include/drm/display/drm_dp_helper.h | 2 + 3 files changed, 61 insertions(+), 49 deletions(-) diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c index b7e03bf02cd8..0c9230f3f994 100644 --- a/drivers/gpu/drm/display/drm_dp_helper.c +++ b/drivers/gpu/drm/display/drm_dp_helper.c @@ -792,6 +792,62 @@ static int read_payload_update_status(struct drm_dp_aux *aux) return status; } +/** + * drm_dp_dpcd_write_payload() - Write payload + * @aux: DisplayPort AUX channel + * @vcpid: Virtual Channel Payload ID + * @start_time_slot: Starting time slot + * @time_slot_count: Time slot count + * + * Write payload table, poll status. + * + * Returns: + * 0 on success, negative error otherwise + */ +int drm_dp_dpcd_write_payload(struct drm_dp_aux *aux, + int vcpid, u8 start_time_slot, u8 time_slot_count) +{ + u8 payload_alloc[3], status; + int ret; + int retries = 0; + + drm_dp_dpcd_writeb(aux, DP_PAYLOAD_TABLE_UPDATE_STATUS, + DP_PAYLOAD_TABLE_UPDATED); + + payload_alloc[0] = vcpid; + payload_alloc[1] = start_time_slot; + payload_alloc[2] = time_slot_count; + + ret = drm_dp_dpcd_write(aux, DP_PAYLOAD_ALLOCATE_SET, payload_alloc, 3); + if (ret != 3) { + drm_dbg_kms(aux->drm_dev, "failed to write payload allocation %d\n", ret); + goto fail; + } + +retry: + ret = drm_dp_dpcd_readb(aux, DP_PAYLOAD_TABLE_UPDATE_STATUS, &status); + if (ret < 0) { + drm_dbg_kms(aux->drm_dev, "failed to read payload table status %d\n", ret); + goto fail; + } + + if (!(status & DP_PAYLOAD_TABLE_UPDATED)) { + retries++; + if (retries < 20) { + usleep_range(10000, 20000); + goto retry; + } + drm_dbg_kms(aux->drm_dev, "status not set after read payload table status %d\n", + status); + ret = -EINVAL; + goto fail; + } + ret = 0; +fail: + return ret; +} +EXPORT_SYMBOL(drm_dp_dpcd_write_payload); + /** * drm_dp_dpcd_poll_act_handled() - Polls for ACT handled status. * @aux: DisplayPort AUX channel diff --git a/drivers/gpu/drm/display/drm_dp_mst_topology.c b/drivers/gpu/drm/display/drm_dp_mst_topology.c index 2bdbc1eb282b..a426d13a7a36 100644 --- a/drivers/gpu/drm/display/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/display/drm_dp_mst_topology.c @@ -67,9 +67,6 @@ static bool dump_dp_payload_table(struct drm_dp_mst_topology_mgr *mgr, static void drm_dp_mst_topology_put_port(struct drm_dp_mst_port *port); -static int drm_dp_dpcd_write_payload(struct drm_dp_mst_topology_mgr *mgr, - int id, u8 start_slot, u8 num_slots); - static int drm_dp_send_dpcd_read(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, int offset, int size, u8 *bytes); @@ -3263,7 +3260,7 @@ EXPORT_SYMBOL(drm_dp_send_query_stream_enc_status); static int drm_dp_create_payload_at_dfp(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_atomic_payload *payload) { - return drm_dp_dpcd_write_payload(mgr, payload->vcpi, payload->vc_start_slot, + return drm_dp_dpcd_write_payload(mgr->aux, payload->vcpi, payload->vc_start_slot, payload->time_slots); } @@ -3294,7 +3291,7 @@ static void drm_dp_destroy_payload_at_remote_and_dfp(struct drm_dp_mst_topology_ } if (payload->payload_allocation_status == DRM_DP_MST_PAYLOAD_ALLOCATION_DFP) - drm_dp_dpcd_write_payload(mgr, payload->vcpi, payload->vc_start_slot, 0); + drm_dp_dpcd_write_payload(mgr->aux, payload->vcpi, payload->vc_start_slot, 0); } /** @@ -3682,7 +3679,7 @@ int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool ms goto out_unlock; /* Write reset payload */ - drm_dp_dpcd_write_payload(mgr, 0, 0, 0x3f); + drm_dp_dpcd_write_payload(mgr->aux, 0, 0, 0x3f); drm_dp_mst_queue_probe_work(mgr); @@ -4679,49 +4676,6 @@ void drm_dp_mst_update_slots(struct drm_dp_mst_topology_state *mst_state, uint8_ } EXPORT_SYMBOL(drm_dp_mst_update_slots); -static int drm_dp_dpcd_write_payload(struct drm_dp_mst_topology_mgr *mgr, - int id, u8 start_slot, u8 num_slots) -{ - u8 payload_alloc[3], status; - int ret; - int retries = 0; - - drm_dp_dpcd_writeb(mgr->aux, DP_PAYLOAD_TABLE_UPDATE_STATUS, - DP_PAYLOAD_TABLE_UPDATED); - - payload_alloc[0] = id; - payload_alloc[1] = start_slot; - payload_alloc[2] = num_slots; - - ret = drm_dp_dpcd_write(mgr->aux, DP_PAYLOAD_ALLOCATE_SET, payload_alloc, 3); - if (ret != 3) { - drm_dbg_kms(mgr->dev, "failed to write payload allocation %d\n", ret); - goto fail; - } - -retry: - ret = drm_dp_dpcd_readb(mgr->aux, DP_PAYLOAD_TABLE_UPDATE_STATUS, &status); - if (ret < 0) { - drm_dbg_kms(mgr->dev, "failed to read payload table status %d\n", ret); - goto fail; - } - - if (!(status & DP_PAYLOAD_TABLE_UPDATED)) { - retries++; - if (retries < 20) { - usleep_range(10000, 20000); - goto retry; - } - drm_dbg_kms(mgr->dev, "status not set after read payload table status %d\n", - status); - ret = -EINVAL; - goto fail; - } - ret = 0; -fail: - return ret; -} - /** * drm_dp_check_act_status() - Polls for ACT handled status. * @mgr: manager to use diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h index 38eea21d1082..69793815aa82 100644 --- a/include/drm/display/drm_dp_helper.h +++ b/include/drm/display/drm_dp_helper.h @@ -567,6 +567,8 @@ int drm_dp_dpcd_read_phy_link_status(struct drm_dp_aux *aux, enum drm_dp_phy dp_phy, u8 link_status[DP_LINK_STATUS_SIZE]); +int drm_dp_dpcd_write_payload(struct drm_dp_aux *aux, + int vcpid, u8 start_time_slot, u8 time_slot_count); int drm_dp_dpcd_poll_act_handled(struct drm_dp_aux *aux, int timeout_ms); bool drm_dp_send_real_edid_checksum(struct drm_dp_aux *aux,