From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 3E13DE7717F for ; Thu, 12 Dec 2024 08:56:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=FoVNNZh4L/GMNtlxTr6ggp+PnIEfUziJ14W8Sk9sycA=; b=fglGh3XICRpquEEiwGuaTtPvwf bavaFb7rNVv6U5ZzUd0GWSdzlwAdKfb8zQ5cWr1XqgwzUy189zvVBo/T4peH163y23ixdZlJhrZMO x/4OiOa2ONkUOOSEudQauJtpg4y3hmFqrnKriqR0LfK78emDrMqHVnghXvDJ8TXmEd+Cb939Gho01 O4SeJz6agLTWIWGjeSbW5b8TaqkC5l9gB1wB0C7K/gZ1g/Y0iCYXw4GjOrCLt0TtocjAB9EFoLgiD 35lDuO8kgeIMALd9jqSZmZmlSDcSCH7HwddO0+nLectNTtnu5jufafauj/BEHCZZ40G24jM9pXaLB 6pi6yhgA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tLezz-0000000HOPe-4C69; Thu, 12 Dec 2024 08:56:44 +0000 Received: from mail-m12746.qiye.163.com ([115.236.127.46]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tLeyq-0000000HOBD-1QID; Thu, 12 Dec 2024 08:55:34 +0000 Received: from [172.16.12.26] (unknown [58.22.7.114]) by smtp.qiye.163.com (Hmail) with ESMTP id 587970be; Thu, 12 Dec 2024 16:55:19 +0800 (GMT+08:00) Message-ID: Date: Thu, 12 Dec 2024 16:55:19 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 06/10] drm/bridge: analogix_dp: Add support for phy configuration. To: Dmitry Baryshkov Cc: heiko@sntech.de, robh@kernel.org, conor+dt@kernel.org, algea.cao@rock-chips.com, rfoss@kernel.org, devicetree@vger.kernel.org, linux-phy@lists.infradead.org, linux-kernel@vger.kernel.org, sebastian.reichel@collabora.com, dri-devel@lists.freedesktop.org, hjc@rock-chips.com, kever.yang@rock-chips.com, linux-rockchip@lists.infradead.org, vkoul@kernel.org, andy.yan@rock-chips.com, krzk+dt@kernel.org, linux-arm-kernel@lists.infradead.org, l.stach@pengutronix.de References: <20241127075157.856029-1-damon.ding@rock-chips.com> <20241127075157.856029-7-damon.ding@rock-chips.com> Content-Language: en-US From: Damon Ding In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFDSUNOT01LS0k3V1ktWUFJV1kPCRoVCBIfWUFZGk1DT1YYHk1DQkkaHUtOGUpWFRQJFh oXVRMBExYaEhckFA4PWVdZGBILWUFZTkNVSUlVTFVKSk9ZV1kWGg8SFR0UWUFZT0tIVUpLSUhCSE NVSktLVUpCS0tZBg++ X-HM-Tid: 0a93ba14685803a3kunm587970be X-HM-MType: 1 X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6MzI6Qjo4FTIPOjQOCTcYCB0h DS8wCT9VSlVKTEhIQkJITElKQ09MVTMWGhIXVR8aFhQVVR8SFRw7CRQYEFYYExILCFUYFBZFWVdZ EgtZQVlOQ1VJSVVMVUpKT1lXWQgBWUFMTE1JNwY+ DKIM-Signature: a=rsa-sha256; b=Bm2MQOWkXjx8Pf9F3W4LsD7hTW78m7eB7oq2XDcJbwtsVGle3yaMemLVAEN+zVoWZx1sSiKi07Y1Rcxs8X+7lH/hi9FsqJO5eqOVWzogYs3zRK3doeb9Kv0vTMPvpyP88zoti2YuAe7NHqy+LN/uRRr11+USss2pTU7MU1cFiqk=; s=default; c=relaxed/relaxed; d=rock-chips.com; v=1; bh=FoVNNZh4L/GMNtlxTr6ggp+PnIEfUziJ14W8Sk9sycA=; h=date:mime-version:subject:message-id:from; X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241212_005532_918779_22120C5B X-CRM114-Status: GOOD ( 17.46 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Dmitry, On 2024/11/30 16:53, Dmitry Baryshkov wrote: > On Wed, Nov 27, 2024 at 03:51:53PM +0800, Damon Ding wrote: >> Add support to configurate link rate, lane count, voltage swing and >> pre-emphasis with phy_configure(). It is helpful in application scenarios >> where analogix controller is mixed with the phy of other vendors. >> >> Signed-off-by: Damon Ding >> --- >> .../drm/bridge/analogix/analogix_dp_core.c | 4 +- >> .../drm/bridge/analogix/analogix_dp_core.h | 2 + >> .../gpu/drm/bridge/analogix/analogix_dp_reg.c | 90 +++++++++++++++++++ >> 3 files changed, 94 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c >> index 6f10d88a34c5..7624ed13cdbf 100644 >> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c >> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c >> @@ -1672,7 +1672,7 @@ EXPORT_SYMBOL_GPL(analogix_dp_probe); >> >> int analogix_dp_suspend(struct analogix_dp_device *dp) >> { >> - phy_power_off(dp->phy); >> + analogix_dp_phy_power_off(dp); > > Why? > >> >> if (dp->plat_data->power_off) >> dp->plat_data->power_off(dp->plat_data); >> @@ -1696,7 +1696,7 @@ int analogix_dp_resume(struct analogix_dp_device *dp) >> if (dp->plat_data->power_on) >> dp->plat_data->power_on(dp->plat_data); >> >> - phy_power_on(dp->phy); >> + analogix_dp_phy_power_on(dp); > > Why? > These changes for phy_power_on()/phy_power_off() may be unnecessary. I will just put the phy_set_mode() before phy_power_on() in next version. >> >> analogix_dp_init_dp(dp); >> >> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h >> index 774d11574b09..a76079d61768 100644 >> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h >> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h >> @@ -232,5 +232,7 @@ int analogix_dp_send_psr_spd(struct analogix_dp_device *dp, >> struct dp_sdp *vsc, bool blocking); >> ssize_t analogix_dp_transfer(struct analogix_dp_device *dp, >> struct drm_dp_aux_msg *msg); >> +void analogix_dp_phy_power_on(struct analogix_dp_device *dp); >> +void analogix_dp_phy_power_off(struct analogix_dp_device *dp); >> >> #endif /* _ANALOGIX_DP_CORE_H */ >> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c >> index 3afc73c858c4..809bb0c72d18 100644 >> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c >> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c >> @@ -11,6 +11,7 @@ >> #include >> #include >> #include >> +#include >> >> #include >> >> @@ -513,10 +514,27 @@ void analogix_dp_enable_sw_function(struct analogix_dp_device *dp) >> void analogix_dp_set_link_bandwidth(struct analogix_dp_device *dp, u32 bwtype) >> { >> u32 reg; >> + int ret; >> >> reg = bwtype; >> if ((bwtype == DP_LINK_BW_2_7) || (bwtype == DP_LINK_BW_1_62)) >> writel(reg, dp->reg_base + ANALOGIX_DP_LINK_BW_SET); >> + >> + if (dp->phy) { >> + union phy_configure_opts phy_cfg = {0}; >> + >> + phy_cfg.dp.lanes = dp->link_train.lane_count; > > You can drop this, .set_lanes is false. > >> + phy_cfg.dp.link_rate = >> + drm_dp_bw_code_to_link_rate(dp->link_train.link_rate) / 100; >> + phy_cfg.dp.set_lanes = false; >> + phy_cfg.dp.set_rate = true; >> + phy_cfg.dp.set_voltages = false; > > You don't need to set those to false, it's cleared by = {0}; > >> + ret = phy_configure(dp->phy, &phy_cfg); >> + if (ret && ret != -EOPNOTSUPP) { >> + dev_err(dp->dev, "%s: phy_configure() failed: %d\n", __func__, ret); >> + return; >> + } >> + } >> } >> >> void analogix_dp_get_link_bandwidth(struct analogix_dp_device *dp, u32 *bwtype) >> @@ -530,9 +548,24 @@ void analogix_dp_get_link_bandwidth(struct analogix_dp_device *dp, u32 *bwtype) >> void analogix_dp_set_lane_count(struct analogix_dp_device *dp, u32 count) >> { >> u32 reg; >> + int ret; >> >> reg = count; >> writel(reg, dp->reg_base + ANALOGIX_DP_LANE_COUNT_SET); >> + >> + if (dp->phy) { >> + union phy_configure_opts phy_cfg = {0}; >> + >> + phy_cfg.dp.lanes = dp->link_train.lane_count; >> + phy_cfg.dp.set_lanes = true; >> + phy_cfg.dp.set_rate = false; >> + phy_cfg.dp.set_voltages = false; > > Likewise > >> + ret = phy_configure(dp->phy, &phy_cfg); >> + if (ret && ret != -EOPNOTSUPP) { >> + dev_err(dp->dev, "%s: phy_configure() failed: %d\n", __func__, ret); >> + return; >> + } >> + } >> } >> >> void analogix_dp_get_lane_count(struct analogix_dp_device *dp, u32 *count) >> @@ -546,10 +579,39 @@ void analogix_dp_get_lane_count(struct analogix_dp_device *dp, u32 *count) >> void analogix_dp_set_lane_link_training(struct analogix_dp_device *dp) >> { >> u8 lane; >> + int ret; >> >> for (lane = 0; lane < dp->link_train.lane_count; lane++) >> writel(dp->link_train.training_lane[lane], >> dp->reg_base + ANALOGIX_DP_LN0_LINK_TRAINING_CTL + 4 * lane); >> + >> + if (dp->phy) { >> + union phy_configure_opts phy_cfg = {0}; >> + >> + for (lane = 0; lane < dp->link_train.lane_count; lane++) { >> + u8 training_lane = dp->link_train.training_lane[lane]; >> + u8 vs, pe; >> + >> + vs = (training_lane & DP_TRAIN_VOLTAGE_SWING_MASK) >> >> + DP_TRAIN_VOLTAGE_SWING_SHIFT; >> + pe = (training_lane & DP_TRAIN_PRE_EMPHASIS_MASK) >> >> + DP_TRAIN_PRE_EMPHASIS_SHIFT; >> + phy_cfg.dp.voltage[lane] = vs; >> + phy_cfg.dp.pre[lane] = pe; >> + } >> + >> + phy_cfg.dp.lanes = dp->link_train.lane_count; >> + phy_cfg.dp.link_rate = >> + drm_dp_bw_code_to_link_rate(dp->link_train.link_rate) / 100; > > You can drop these two. Indeed, all the needless assignments for phy_configure() will be deleted in next version. > >> + phy_cfg.dp.set_lanes = false; >> + phy_cfg.dp.set_rate = false; >> + phy_cfg.dp.set_voltages = true; >> + ret = phy_configure(dp->phy, &phy_cfg); >> + if (ret && ret != -EOPNOTSUPP) { >> + dev_err(dp->dev, "%s: phy_configure() failed: %d\n", __func__, ret); >> + return; >> + } >> + } >> } >> >> u32 analogix_dp_get_lane_link_training(struct analogix_dp_device *dp, u8 lane) >> @@ -1053,3 +1115,31 @@ ssize_t analogix_dp_transfer(struct analogix_dp_device *dp, >> >> return -EREMOTEIO; >> } >> + >> +void analogix_dp_phy_power_on(struct analogix_dp_device *dp) >> +{ >> + int ret; >> + >> + ret = phy_set_mode(dp->phy, PHY_MODE_DP); >> + if (ret) { >> + dev_err(dp->dev, "%s: phy_set_mode() failed: %d\n", __func__, ret); >> + return; >> + } >> + >> + ret = phy_power_on(dp->phy); >> + if (ret) { >> + dev_err(dp->dev, "%s: phy_power_on() failed: %d\n", __func__, ret); > > There is already a dev_err() call in phy_power_on(). > >> + return; >> + } >> +} >> + >> +void analogix_dp_phy_power_off(struct analogix_dp_device *dp) >> +{ >> + int ret; >> + >> + ret = phy_power_off(dp->phy); >> + if (ret) { >> + dev_err(dp->dev, "%s: phy_power_off() failed: %d\n", __func__, ret); > > There is already a dev_err() call in phy_power_off(). > >> + return; >> + } >> +} >> -- >> 2.34.1 >> >> >> _______________________________________________ >> Linux-rockchip mailing list >> Linux-rockchip@lists.infradead.org >> http://lists.infradead.org/mailman/listinfo/linux-rockchip > Best regards, Damon