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 X-Spam-Level: X-Spam-Status: No, score=-9.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_2 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1A03CC433DB for ; Thu, 28 Jan 2021 11:04:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C5D8E6146D for ; Thu, 28 Jan 2021 11:04:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229658AbhA1LDy (ORCPT ); Thu, 28 Jan 2021 06:03:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55288 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229569AbhA1LDv (ORCPT ); Thu, 28 Jan 2021 06:03:51 -0500 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A1F7DC061573; Thu, 28 Jan 2021 03:03:09 -0800 (PST) Received: by mail-pl1-x62f.google.com with SMTP id b8so3106976plh.12; Thu, 28 Jan 2021 03:03:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:in-reply-to:references :organization:mime-version:content-transfer-encoding; bh=sBkTD1ZtjeS8jkP5hzFFT8Mun2/mkX9YEzpaHUFxKDc=; b=oWU+dINW3A0WDBPghq7TwOLXYGxn8ZkRNOSVDRg1ZoLaH3tdPLGkRb+/TjL3IYxi/t yL01IxDEFsbuWL4/FWKNeq1HG3nMJdFjnT2B+aCjX71phI82H9u7q+C3c6FPZBQmQ5Xm TpjmQbpkFZzMPm029X2JLq2jCljq1OAfy3e177WBsYDvmrP+uingSJpcWoKlqG18IpS9 PUxzurfgaUSLguu4Hw5ChRSCchxcXAUIY7YqXj129oIJ+GGqABf2Jp9ctWIVMxJrFmMj qERYj5C96cgwnz//AGUDzeow2Ps8or8pBU4WPRZZcO0P8+S3B7XWK2ABKcw0nlHrM8YP J4RA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:in-reply-to :references:organization:mime-version:content-transfer-encoding; bh=sBkTD1ZtjeS8jkP5hzFFT8Mun2/mkX9YEzpaHUFxKDc=; b=qR1Bl23z1jZ7e5zXhnQGYM68jLUFjipk3DECmSm1RtvjlYkVqhT+agxwYtLwkFu575 ttXYYv440h1qd6n0adOFAKKegtGXRoV1p3h3NyB/kOaBPVIF1SEI1JyiBTYPKTbzqVUR 9dOzGoydKbBg78wVr2AnTzR1/JqjY71R2z+0+4TAj97SygU9ZUIKDOm2kDtUTsqTvscm oslGU41CzTjd0Sc22I4RkwuQZn01KfpnkIv+yIq80nJDlcJ39PvC28mxCdYurkcQ4pbC iurSFBOyVyTn9tocERrSMNRKst72Yt6ET0oB++AVXTEUCwLwaBRR5Z/tm/gZ8Uecj3S3 P8Dw== X-Gm-Message-State: AOAM530U1APRxvR7dV4uqXROZM53n8imEVxyJc+E37NFsiuU/OKF+oq1 xUHIoTqPKF7k9vojN2wtYk4= X-Google-Smtp-Source: ABdhPJxuKefhxuATg5SzADrFU6X/JMwte19Bjrcs0K6eys/yFrX6MPMndXfWktd7S71LXqppupaCdg== X-Received: by 2002:a17:90a:db50:: with SMTP id u16mr10793125pjx.39.1611831789172; Thu, 28 Jan 2021 03:03:09 -0800 (PST) Received: from localhost ([103.220.76.197]) by smtp.gmail.com with ESMTPSA id h6sm5685953pfr.47.2021.01.28.03.03.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Jan 2021 03:03:08 -0800 (PST) Date: Thu, 28 Jan 2021 19:03:01 +0800 From: carlis To: Geert Uytterhoeven Cc: Kari Argillander , Greg KH , Colin King , oliver.graute@kococonnector.com, zhangxuezhi1@yulong.com, mh12gx2825@gmail.com, Stefano Brivio , DRI Development , Linux Fbdev development list , driverdevel , Linux Kernel Mailing List Subject: Re: [PATCH v10] staging: fbtft: add tearing signal detect Message-ID: <20210128190301.00007ebe@gmail.com> In-Reply-To: References: <1611754972-151016-1-git-send-email-zhangxuezhi3@gmail.com> <20210127223222.3lavtl3roc4cabso@kari-VirtualBox> <20210128094258.000012c3@gmail.com> <20210128065233.ji4b7ea54ihyu2l5@kari-VirtualBox> Organization: Tyzmig-ryrjum-8kedto X-Mailer: Claws Mail 3.17.4 (GTK+ 2.24.32; i686-w64-mingw32) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org On Thu, 28 Jan 2021 10:42:54 +0100 Geert Uytterhoeven wrote: > Hi Kari, > > On Thu, Jan 28, 2021 at 7:53 AM Kari Argillander > wrote: > > On Thu, Jan 28, 2021 at 09:42:58AM +0800, carlis wrote: > > > On Thu, 28 Jan 2021 00:32:22 +0200 > > > Kari Argillander wrote: > > > > > #include "fbtft.h" > > > > > > > > > > #define DRVNAME "fb_st7789v" > > > > > @@ -66,6 +69,32 @@ enum st7789v_command { > > > > > #define MADCTL_MX BIT(6) /* bitmask for column address order > > > > > */ #define MADCTL_MY BIT(7) /* bitmask for page address order > > > > > */ > > > > > > > > > > +#define SPI_PANEL_TE_TIMEOUT 400 /* msecs */ > > > > > +static struct mutex te_mutex;/* mutex for set te gpio irq > > > > > status */ > > > > > > > > Space after ; > > > hi, i have fix it in the patch v11 > > > > > > > > Yeah sorry. I accidentally review wrong patch. But mostly stuff are > > still relevant. > > > > > > > @@ -82,6 +111,33 @@ enum st7789v_command { > > > > > */ > > > > > static int init_display(struct fbtft_par *par) > > > > > { > > > > > + int rc; > > > > > + struct device *dev = par->info->device; > > > > > + > > > > > + par->gpio.te = devm_gpiod_get_index_optional(dev, "te", 0, > > > > > GPIOD_IN); > > > > > + if (IS_ERR(par->gpio.te)) { > > > > > + rc = PTR_ERR(par->gpio.te); > > > > > + dev_err(par->info->device, "Failed to request te > > > > > gpio: %d\n", rc); > > > > > + return rc; > > > > > + } > > > > > > > > You request with optinal and you still want to error out? We > > > > could just continue and not care about that error. User will be > > > > happier if device still works somehow. > > devm_gpiod_get_index_optional() returns NULL, not an error, if the > GPIO is not found. So if IS_ERR() is the right check. > > And checks for -EPROBE_DEFER can be handled automatically > by using dev_err_probe() instead of dev_err(). > hi, i fix it like below!? par->gpio.te = devm_gpiod_get_index_optional(dev, "te", 0, GPIOD_IN); if (IS_ERR(par->gpio.te)) { rc = PTR_ERR(par->gpio.te); dev_err_probe(par->info->device, rc, "Failed to request te gpio\n"); return rc; } if (par->gpio.te) { init_completion(&spi_panel_te); rc = devm_request_irq(dev, gpiod_to_irq(par->gpio.te), spi_panel_te_handler, IRQF_TRIGGER_RISING, "TE_GPIO", par); if (rc) { dev_err(par->info->device, "TE request_irq failed.\n"); return rc; } disable_irq_nosync(gpiod_to_irq(par->gpio.te)); } else { dev_info(par->info->device, "%s:%d, TE gpio not specified\n", __func__, __LINE__); } > > > You mean i just delete this dev_err print ?! > > > like this: > > > par->gpio.te = devm_gpiod_get_index_optional(dev, "te", > > > 0,GPIOD_IN); > > > if (IS_ERR(par->gpio.te)) > > > return PTR_ERR(par->gpio.te); > > > > Not exactly. I'm suggesting something like this. > > > > if (IS_ERR(par->gpio.te) == -EPROBE_DEFER) { > > return -EPROBE_DEFER; > > > > if (IS_ERR(par->gpio.te)) > > par-gpio.te = NULL; > > > > This like beginning of your patch series but the difference is that > > if EPROBE_DEFER then we will try again later. Any other error and > > we will just ignore TE gpio. But this is up to you what you want to > > do. To me this just seems place where this kind of logic can work. > > Gr{oetje,eeting}s, > > Geert > regards, zhangxuezhi