From patchwork Mon Apr 23 10:49:40 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Enric Balletbo i Serra X-Patchwork-Id: 10356685 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 B5F2960225 for ; Mon, 23 Apr 2018 10:55:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A46B528A64 for ; Mon, 23 Apr 2018 10:55:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 952D728A6A; Mon, 23 Apr 2018 10:55:05 +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=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, MAILING_LIST_MULTI, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B60B928A69 for ; Mon, 23 Apr 2018 10:55:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=72ROS2wpQbnJRfxwAlmJzPG4fBoscc4piq6G4b/GT1c=; b=JoeFmpIkxVLLDQ ycAtsijR2UhtwEbDFe/dA3DicwMMdrV5gopXUMn8SoVz2g0G+heEp/AVe643TTivXTk06hCxu7J9i NQ+QkbdHX3nNtCfqrbYkBYN022pRE/3djEcDgFn1QXbf8gYbcIRXiAmVMgS3qPgVIOhAQA4EcT4wJ PPiovhXIAfBeHBAcGswt3RW4cpeGCs89izQMNS17BYsHdaWhpRouDhjv2ni8VEIeM42GIu0l3wjTm id52mse73W8mnkfs7TQxtXP6QNMhUa9ltpqzSXRGR0wB88AF6xPRCR1tzC3pBJ97uMh8wRsF5+ccA RQO8LLg2fbfd9GIhy/6A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fAZ7W-0000zw-W2; Mon, 23 Apr 2018 10:54:55 +0000 Received: from bhuna.collabora.co.uk ([2a00:1098:0:82:1000:25:2eeb:e3e3]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fAZ3H-0007Q5-Us; Mon, 23 Apr 2018 10:50:37 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: eballetbo) with ESMTPSA id E2881277B99 From: Enric Balletbo i Serra To: architt@codeaurora.org, inki.dae@samsung.com, thierry.reding@gmail.com, hjc@rock-chips.com, seanpaul@chromium.org, airlied@linux.ie, tfiga@chromium.org, heiko@sntech.de Subject: [RESEND PATCH v6 04/27] drm/bridge: analogix_dp: Retry bridge enable when it failed Date: Mon, 23 Apr 2018 12:49:40 +0200 Message-Id: <20180423105003.9004-5-enric.balletbo@collabora.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180423105003.9004-1-enric.balletbo@collabora.com> References: <20180423105003.9004-1-enric.balletbo@collabora.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180423_035032_263245_DAFEE375 X-CRM114-Status: GOOD ( 15.15 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, a.hajda@samsung.com, Laurent.pinchart@ideasonboard.com, kernel@collabora.com, m.szyprowski@samsung.com, linux-samsung-soc@vger.kernel.org, jy0922.shim@samsung.com, rydberg@bitmath.org, krzk@kernel.org, linux-rockchip@lists.infradead.org, kgene@kernel.org, orjan.eide@arm.com, wxt@rock-chips.com, jeffy.chen@rock-chips.com, =?UTF-8?q?St=C3=A9phane=20Marchesin?= , linux-arm-kernel@lists.infradead.org, wzz@rock-chips.com, hl@rock-chips.com, jingoohan1@gmail.com, sw0312.kim@samsung.com, dianders@chromium.org, kyungmin.park@samsung.com, Enric Balletbo i Serra , kuankuan.y@gmail.com, hshi@chromium.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: zain wang When we enable bridge failed, we have to retry it, otherwise we would get the abnormal display. Cc: Stéphane Marchesin Signed-off-by: zain wang Signed-off-by: Sean Paul Signed-off-by: Thierry Escande Reviewed-by: Andrzej Hajda Signed-off-by: Enric Balletbo i Serra Tested-by: Marek Szyprowski Reviewed-by: Archit Taneja --- .../drm/bridge/analogix/analogix_dp_core.c | 65 +++++++++++++++---- .../drm/bridge/analogix/analogix_dp_core.h | 3 +- .../gpu/drm/bridge/analogix/analogix_dp_reg.c | 5 +- 3 files changed, 56 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index 85dbb1ca9886..bf805f156272 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -43,8 +43,10 @@ struct bridge_init { struct device_node *node; }; -static void analogix_dp_init_dp(struct analogix_dp_device *dp) +static int analogix_dp_init_dp(struct analogix_dp_device *dp) { + int ret; + analogix_dp_reset(dp); analogix_dp_swreset(dp); @@ -56,10 +58,13 @@ static void analogix_dp_init_dp(struct analogix_dp_device *dp) analogix_dp_enable_sw_function(dp); analogix_dp_config_interrupt(dp); - analogix_dp_init_analog_func(dp); + ret = analogix_dp_init_analog_func(dp); + if (ret) + return ret; analogix_dp_init_hpd(dp); analogix_dp_init_aux(dp); + return 0; } static int analogix_dp_detect_hpd(struct analogix_dp_device *dp) @@ -918,7 +923,7 @@ static irqreturn_t analogix_dp_irq_thread(int irq, void *arg) return IRQ_HANDLED; } -static void analogix_dp_commit(struct analogix_dp_device *dp) +static int analogix_dp_commit(struct analogix_dp_device *dp) { int ret; @@ -928,11 +933,10 @@ static void analogix_dp_commit(struct analogix_dp_device *dp) DRM_ERROR("failed to disable the panel\n"); } - ret = readx_poll_timeout(analogix_dp_train_link, dp, ret, !ret, 100, - DP_TIMEOUT_TRAINING_US * 5); + ret = analogix_dp_train_link(dp); if (ret) { dev_err(dp->dev, "unable to do link train, ret=%d\n", ret); - return; + return ret; } analogix_dp_enable_scramble(dp, 1); @@ -953,6 +957,7 @@ static void analogix_dp_commit(struct analogix_dp_device *dp) dp->psr_enable = analogix_dp_detect_sink_psr(dp); if (dp->psr_enable) analogix_dp_enable_sink_psr(dp); + return 0; } /* @@ -1149,12 +1154,9 @@ static void analogix_dp_bridge_pre_enable(struct drm_bridge *bridge) DRM_ERROR("failed to setup the panel ret = %d\n", ret); } -static void analogix_dp_bridge_enable(struct drm_bridge *bridge) +static int analogix_dp_set_bridge(struct analogix_dp_device *dp) { - struct analogix_dp_device *dp = bridge->driver_private; - - if (dp->dpms_mode == DRM_MODE_DPMS_ON) - return; + int ret; pm_runtime_get_sync(dp->dev); @@ -1162,11 +1164,46 @@ static void analogix_dp_bridge_enable(struct drm_bridge *bridge) dp->plat_data->power_on(dp->plat_data); phy_power_on(dp->phy); - analogix_dp_init_dp(dp); + + ret = analogix_dp_init_dp(dp); + if (ret) + goto out_dp_init; + + ret = analogix_dp_commit(dp); + if (ret) + goto out_dp_init; + enable_irq(dp->irq); - analogix_dp_commit(dp); + return 0; - dp->dpms_mode = DRM_MODE_DPMS_ON; +out_dp_init: + phy_power_off(dp->phy); + if (dp->plat_data->power_off) + dp->plat_data->power_off(dp->plat_data); + pm_runtime_put_sync(dp->dev); + + return ret; +} + +static void analogix_dp_bridge_enable(struct drm_bridge *bridge) +{ + struct analogix_dp_device *dp = bridge->driver_private; + int timeout_loop = 0; + + if (dp->dpms_mode == DRM_MODE_DPMS_ON) + return; + + while (timeout_loop < MAX_PLL_LOCK_LOOP) { + if (analogix_dp_set_bridge(dp) == 0) { + dp->dpms_mode = DRM_MODE_DPMS_ON; + return; + } + dev_err(dp->dev, "failed to set bridge, retry: %d\n", + timeout_loop); + timeout_loop++; + usleep_range(10, 11); + } + dev_err(dp->dev, "too many times retry set bridge, give it up\n"); } static void analogix_dp_bridge_disable(struct drm_bridge *bridge) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h index 403ff853464b..769255dc6e99 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h @@ -19,6 +19,7 @@ #define DP_TIMEOUT_LOOP_COUNT 100 #define MAX_CR_LOOP 5 #define MAX_EQ_LOOP 5 +#define MAX_PLL_LOCK_LOOP 5 /* Training takes 22ms if AUX channel comm fails. Use this as retry interval */ #define DP_TIMEOUT_TRAINING_US 22000 @@ -197,7 +198,7 @@ void analogix_dp_set_pll_power_down(struct analogix_dp_device *dp, bool enable); void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp, enum analog_power_block block, bool enable); -void analogix_dp_init_analog_func(struct analogix_dp_device *dp); +int analogix_dp_init_analog_func(struct analogix_dp_device *dp); void analogix_dp_init_hpd(struct analogix_dp_device *dp); void analogix_dp_force_hpd(struct analogix_dp_device *dp); enum dp_irq_type analogix_dp_get_irq_type(struct analogix_dp_device *dp); diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c index e78c861b9e06..b47c5af43560 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c @@ -333,7 +333,7 @@ void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp, } } -void analogix_dp_init_analog_func(struct analogix_dp_device *dp) +int analogix_dp_init_analog_func(struct analogix_dp_device *dp) { u32 reg; int timeout_loop = 0; @@ -355,7 +355,7 @@ void analogix_dp_init_analog_func(struct analogix_dp_device *dp) timeout_loop++; if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) { dev_err(dp->dev, "failed to get pll lock status\n"); - return; + return -ETIMEDOUT; } usleep_range(10, 20); } @@ -366,6 +366,7 @@ void analogix_dp_init_analog_func(struct analogix_dp_device *dp) reg &= ~(SERDES_FIFO_FUNC_EN_N | LS_CLK_DOMAIN_FUNC_EN_N | AUX_FUNC_EN_N); writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_2); + return 0; } void analogix_dp_clear_hotplug_interrupts(struct analogix_dp_device *dp)