From patchwork Fri Jan 14 17:54:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 12713870 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C57B1C4332F for ; Fri, 14 Jan 2022 17:55:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243964AbiANRzH (ORCPT ); Fri, 14 Jan 2022 12:55:07 -0500 Received: from alexa-out.qualcomm.com ([129.46.98.28]:46153 "EHLO alexa-out.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243952AbiANRzF (ORCPT ); Fri, 14 Jan 2022 12:55:05 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1642182906; x=1673718906; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=pfoQ5BboI4iWma110GILo0a/QjTbyn8jZoAt2MIZDP8=; b=hfww2O0IWX+Bl7I1yZPu4VFm875YqM21wiDW+K/KrddmlbGDRIbid4eo 7HuNN2nKsDbO5ZQFIX6rKjHOW+Uc45gKkGCqDvmPhWlzSJ36PxS2pUTD0 RbJV4qflwsTi35M58ISx8cYSMwTDqYTCl2Wkt2AJVRTkMHndoirqLN2sg E=; Received: from ironmsg08-lv.qualcomm.com ([10.47.202.152]) by alexa-out.qualcomm.com with ESMTP; 14 Jan 2022 09:55:05 -0800 X-QCInternal: smtphost Received: from nasanex01c.na.qualcomm.com ([10.47.97.222]) by ironmsg08-lv.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jan 2022 09:55:04 -0800 Received: from nalasex01a.na.qualcomm.com (10.47.209.196) by nasanex01c.na.qualcomm.com (10.47.97.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.922.19; Fri, 14 Jan 2022 09:54:49 -0800 Received: from khsieh-linux1.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.922.19; Fri, 14 Jan 2022 09:54:49 -0800 From: Kuogee Hsieh To: , , , , , , , , , CC: Kuogee Hsieh , , , , , , , Subject: [PATCH v14 3/4] drm/msm/dp: add support of tps4 (training pattern 4) for HBR3 Date: Fri, 14 Jan 2022 09:54:33 -0800 Message-ID: <1642182874-27296-4-git-send-email-quic_khsieh@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1642182874-27296-1-git-send-email-quic_khsieh@quicinc.com> References: <1642182874-27296-1-git-send-email-quic_khsieh@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Kuogee Hsieh Some DP sinkers prefer to use tps4 instead of tps3 during training #2. This patch will use tps4 to perform link training #2 if sinker's DPCD supports it. Changes in V2: -- replace dp_catalog_ctrl_set_pattern() with dp_catalog_ctrl_set_pattern_state_bit() Changes in V3: -- change state_ctrl_bits type to u32 and pattern type to u8 Changes in V4: -- align } else if { and } else { Changes in v10: -- group into one series Changes in v11: -- drop drm/msm/dp: dp_link_parse_sink_count() return immediately if aux read Signed-off-by: Kuogee Hsieh Reviewed-by: Stephen Boyd --- drivers/gpu/drm/msm/dp/dp_catalog.c | 12 ++++++------ drivers/gpu/drm/msm/dp/dp_catalog.h | 2 +- drivers/gpu/drm/msm/dp/dp_ctrl.c | 17 ++++++++++++----- 3 files changed, 19 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c index 6ae9b29..64f0b26 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.c +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c @@ -456,19 +456,19 @@ void dp_catalog_ctrl_config_msa(struct dp_catalog *dp_catalog, dp_write_p0(catalog, MMSS_DP_DSC_DTO, 0x0); } -int dp_catalog_ctrl_set_pattern(struct dp_catalog *dp_catalog, - u32 pattern) +int dp_catalog_ctrl_set_pattern_state_bit(struct dp_catalog *dp_catalog, + u32 state_bit) { int bit, ret; u32 data; struct dp_catalog_private *catalog = container_of(dp_catalog, struct dp_catalog_private, dp_catalog); - bit = BIT(pattern - 1); - DRM_DEBUG_DP("hw: bit=%d train=%d\n", bit, pattern); + bit = BIT(state_bit - 1); + DRM_DEBUG_DP("hw: bit=%d train=%d\n", bit, state_bit); dp_catalog_ctrl_state_ctrl(dp_catalog, bit); - bit = BIT(pattern - 1) << DP_MAINLINK_READY_LINK_TRAINING_SHIFT; + bit = BIT(state_bit - 1) << DP_MAINLINK_READY_LINK_TRAINING_SHIFT; /* Poll for mainlink ready status */ ret = readx_poll_timeout(readl, catalog->io->dp_controller.link.base + @@ -476,7 +476,7 @@ int dp_catalog_ctrl_set_pattern(struct dp_catalog *dp_catalog, data, data & bit, POLLING_SLEEP_US, POLLING_TIMEOUT_US); if (ret < 0) { - DRM_ERROR("set pattern for link_train=%d failed\n", pattern); + DRM_ERROR("set state_bit for link_train=%d failed\n", state_bit); return ret; } return 0; diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h index 6965afa..7dea101 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.h +++ b/drivers/gpu/drm/msm/dp/dp_catalog.h @@ -94,7 +94,7 @@ void dp_catalog_ctrl_mainlink_ctrl(struct dp_catalog *dp_catalog, bool enable); void dp_catalog_ctrl_config_misc(struct dp_catalog *dp_catalog, u32 cc, u32 tb); void dp_catalog_ctrl_config_msa(struct dp_catalog *dp_catalog, u32 rate, u32 stream_rate_khz, bool fixed_nvid); -int dp_catalog_ctrl_set_pattern(struct dp_catalog *dp_catalog, u32 pattern); +int dp_catalog_ctrl_set_pattern_state_bit(struct dp_catalog *dp_catalog, u32 pattern); void dp_catalog_ctrl_reset(struct dp_catalog *dp_catalog); bool dp_catalog_ctrl_mainlink_ready(struct dp_catalog *dp_catalog); void dp_catalog_ctrl_enable_irq(struct dp_catalog *dp_catalog, bool enable); diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index 9c80b49..f98df93 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -1083,7 +1083,7 @@ static int dp_ctrl_link_train_1(struct dp_ctrl_private *ctrl, *training_step = DP_TRAINING_1; - ret = dp_catalog_ctrl_set_pattern(ctrl->catalog, DP_TRAINING_PATTERN_1); + ret = dp_catalog_ctrl_set_pattern_state_bit(ctrl->catalog, 1); if (ret) return ret; dp_ctrl_train_pattern_set(ctrl, DP_TRAINING_PATTERN_1 | @@ -1181,7 +1181,8 @@ static int dp_ctrl_link_train_2(struct dp_ctrl_private *ctrl, int *training_step) { int tries = 0, ret = 0; - char pattern; + u8 pattern; + u32 state_ctrl_bit; int const maximum_retries = 5; u8 link_status[DP_LINK_STATUS_SIZE]; @@ -1189,12 +1190,18 @@ static int dp_ctrl_link_train_2(struct dp_ctrl_private *ctrl, *training_step = DP_TRAINING_2; - if (drm_dp_tps3_supported(ctrl->panel->dpcd)) + if (drm_dp_tps4_supported(ctrl->panel->dpcd)) { + pattern = DP_TRAINING_PATTERN_4; + state_ctrl_bit = 4; + } else if (drm_dp_tps3_supported(ctrl->panel->dpcd)) { pattern = DP_TRAINING_PATTERN_3; - else + state_ctrl_bit = 3; + } else { pattern = DP_TRAINING_PATTERN_2; + state_ctrl_bit = 2; + } - ret = dp_catalog_ctrl_set_pattern(ctrl->catalog, pattern); + ret = dp_catalog_ctrl_set_pattern_state_bit(ctrl->catalog, state_ctrl_bit); if (ret) return ret;