From patchwork Tue Oct 18 06:21:37 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zain Wang X-Patchwork-Id: 9381553 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 5382C60487 for ; Tue, 18 Oct 2016 08:11:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 45BDC28C44 for ; Tue, 18 Oct 2016 08:11:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3A5E728ED5; Tue, 18 Oct 2016 08:11:47 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id CEE2328C44 for ; Tue, 18 Oct 2016 08:11:46 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 09A3D6E3D3; Tue, 18 Oct 2016 08:11:33 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from regular1.263xmail.com (regular1.263xmail.com [211.150.99.140]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8C4836E393 for ; Tue, 18 Oct 2016 06:21:48 +0000 (UTC) Received: from wzz?rock-chips.com (unknown [192.168.167.130]) by regular1.263xmail.com (Postfix) with ESMTP id 97FF64D21; Tue, 18 Oct 2016 14:21:44 +0800 (CST) X-263anti-spam: KSV:0;BIG:0;ABS:1;DNS:0;ATT:0;SPF:S; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 1 X-SKE-CHECKED: 1 X-ADDR-CHECKED: 0 Received: from localhost.localdomain (localhost [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id 4240F3BA; Tue, 18 Oct 2016 14:21:41 +0800 (CST) X-RL-SENDER: wzz@rock-chips.com X-FST-TO: seanpaul@chromium.org X-SENDER-IP: 103.29.142.67 X-LOGIN-NAME: wzz@rock-chips.com X-UNIQUE-TAG: <1e9edb7c34e5937a67f9b98087ed3c99> X-ATTACHMENT-NUM: 0 X-SENDER: zain.wang@rock-chips.com X-DNS-TYPE: 0 Received: from localhost.localdomain (unknown [103.29.142.67]) by smtp.263.net (Postfix) whith ESMTP id 14878VP8EJ5; Tue, 18 Oct 2016 14:21:45 +0800 (CST) From: Zain Wang To: Sean Paul , Daniel Vetter , Inki Dae , David Airlie Subject: [PATCH v3 3/6] drm/bridge: analogix_dp: detect Sink PSR state after configuring the PSR Date: Tue, 18 Oct 2016 14:21:37 +0800 Message-Id: <1476771697-11895-1-git-send-email-wzz@rock-chips.com> X-Mailer: git-send-email 1.9.1 X-Mailman-Approved-At: Tue, 18 Oct 2016 08:11:31 +0000 Cc: Krzysztof Kozlowski , linux-samsung-soc@vger.kernel.org, Tomeu Vizoso , linux-rockchip@lists.infradead.org, Jingoo Han , dianders@chromium.org, dri-devel@lists.freedesktop.org, Tomasz Figa , Javier Martinez Canillas , Mika Kahola , =?UTF-8?q?St=C3=A9phane=20Marchesin?= , Thierry Reding , linux-kernel@vger.kernel.org X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Yakir Yang Make sure the request PSR state takes effect in analogix_dp_send_psr_spd() function, or print the sink PSR error state if we failed to apply the requested PSR setting. Signed-off-by: zain wang Signed-off-by: Yakir Yang --- Changes in v3: None Changes in v2: None drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 6 ++---- drivers/gpu/drm/bridge/analogix/analogix_dp_core.h | 6 ++++-- drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 25 ++++++++++++++++++++-- drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 6 ++++-- 4 files changed, 33 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index bcae4dd..7faad93 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -124,8 +124,7 @@ int analogix_dp_enable_psr(struct device *dev) psr_vsc.DB0 = 0; psr_vsc.DB1 = EDP_VSC_PSR_STATE_ACTIVE | EDP_VSC_PSR_CRC_VALUES_VALID; - analogix_dp_send_psr_spd(dp, &psr_vsc); - return 0; + return analogix_dp_send_psr_spd(dp, &psr_vsc); } EXPORT_SYMBOL_GPL(analogix_dp_enable_psr); @@ -147,8 +146,7 @@ int analogix_dp_disable_psr(struct device *dev) psr_vsc.DB0 = 0; psr_vsc.DB1 = 0; - analogix_dp_send_psr_spd(dp, &psr_vsc); - return 0; + return analogix_dp_send_psr_spd(dp, &psr_vsc); } EXPORT_SYMBOL_GPL(analogix_dp_disable_psr); diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h index 5c6a288..cdc0535 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h @@ -20,6 +20,8 @@ #define MAX_CR_LOOP 5 #define MAX_EQ_LOOP 5 +#define DP_TIMEOUT_PSR_LOOP_MS msecs_to_jiffies(300) + /* DP_MAX_LANE_COUNT */ #define DPCD_ENHANCED_FRAME_CAP(x) (((x) >> 7) & 0x1) #define DPCD_MAX_LANE_COUNT(x) ((x) & 0x1f) @@ -247,8 +249,8 @@ void analogix_dp_config_video_slave_mode(struct analogix_dp_device *dp); void analogix_dp_enable_scrambling(struct analogix_dp_device *dp); void analogix_dp_disable_scrambling(struct analogix_dp_device *dp); void analogix_dp_enable_psr_crc(struct analogix_dp_device *dp); -void analogix_dp_send_psr_spd(struct analogix_dp_device *dp, - struct edp_vsc_psr *vsc); +int analogix_dp_send_psr_spd(struct analogix_dp_device *dp, + struct edp_vsc_psr *vsc); ssize_t analogix_dp_transfer(struct analogix_dp_device *dp, struct drm_dp_aux_msg *msg); diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c index cd37ac0..9e1177c 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c @@ -992,10 +992,12 @@ void analogix_dp_enable_psr_crc(struct analogix_dp_device *dp) writel(PSR_VID_CRC_ENABLE, dp->reg_base + ANALOGIX_DP_CRC_CON); } -void analogix_dp_send_psr_spd(struct analogix_dp_device *dp, - struct edp_vsc_psr *vsc) +int analogix_dp_send_psr_spd(struct analogix_dp_device *dp, + struct edp_vsc_psr *vsc) { + unsigned long timeout; unsigned int val; + u8 sink; /* don't send info frame */ val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL); @@ -1036,6 +1038,25 @@ void analogix_dp_send_psr_spd(struct analogix_dp_device *dp, val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL); val |= IF_EN; writel(val, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL); + + timeout = jiffies + DP_TIMEOUT_PSR_LOOP_MS; + while (time_before(jiffies, timeout)) { + val = drm_dp_dpcd_readb(&dp->aux, DP_PSR_STATUS, &sink); + if (val != 1) { + dev_err(dp->dev, "PSR_STATUS read failed ret=%d", val); + return -EBUSY; + } + + if ((vsc->DB1 && sink == DP_PSR_SINK_ACTIVE_RFB) || + (!vsc->DB1 && sink == DP_PSR_SINK_INACTIVE)) + return 0; + + usleep_range(1000, 1500); + } + + dev_warn(dp->dev, "Failed to apply PSR, sink state was [%x]", sink); + + return -ETIMEDOUT; } ssize_t analogix_dp_transfer(struct analogix_dp_device *dp, diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c index e5471e7..1c2d756 100644 --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c @@ -105,7 +105,7 @@ static void analogix_dp_psr_work(struct work_struct *work) struct rockchip_dp_device *dp = container_of(work, typeof(*dp), psr_work); struct drm_crtc *crtc = dp->encoder.crtc; - int psr_state = dp->psr_state; + int psr_state; int vact_end; int ret; unsigned long flags; @@ -123,11 +123,13 @@ static void analogix_dp_psr_work(struct work_struct *work) } spin_lock_irqsave(&dp->psr_lock, flags); + psr_state = dp->psr_state; + spin_unlock_irqrestore(&dp->psr_lock, flags); + if (psr_state == EDP_VSC_PSR_STATE_ACTIVE) analogix_dp_enable_psr(dp->dev); else analogix_dp_disable_psr(dp->dev); - spin_unlock_irqrestore(&dp->psr_lock, flags); } static int rockchip_dp_pre_init(struct rockchip_dp_device *dp)