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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 48284C433EF for ; Wed, 6 Jul 2022 14:58:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233308AbiGFO6U (ORCPT ); Wed, 6 Jul 2022 10:58:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44844 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232950AbiGFO6R (ORCPT ); Wed, 6 Jul 2022 10:58:17 -0400 Received: from mail-wr1-x430.google.com (mail-wr1-x430.google.com [IPv6:2a00:1450:4864:20::430]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B14B51838E for ; Wed, 6 Jul 2022 07:58:15 -0700 (PDT) Received: by mail-wr1-x430.google.com with SMTP id d16so16134802wrv.10 for ; Wed, 06 Jul 2022 07:58:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=date:from:subject:to:cc:message-id:mime-version; bh=LKQeiupsjWXxBDwoTZSPPHdlPTjQPIAaFqaKyAW0P6U=; b=AD0lLbpH8JCVYBU8V3rmJht/6J16Po5+P/vNLyVCHtt0EA7frZi8VfFKSmyBXKf0UF Fq25TQnM5SB2+zbQWN6y0vPiJFPJM6O0GT6AoAcjzDAPAJbK6dcEoF90dlVg3kCrCCYk yWGGQmVHEFjX8mNnIffKqpqRyvvECVP1kZvEqxIoVNLPc0ecAit3djDIupPDkRSFEPlr QupFTmdUsp/26Hv2YB0A32L8MC+e+PYmq7DBZaFZ3wAyIc87LuvPMXimrafEvRFelH3K 4WiR0RjZUX2l1DJed69UhYRXtCC7dqTun6l2iQqSErP6Y/CR7KENojKdPyxDjveccUk0 K/eg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:subject:to:cc:message-id:mime-version; bh=LKQeiupsjWXxBDwoTZSPPHdlPTjQPIAaFqaKyAW0P6U=; b=0jmEkKfKHFIHpaKpGCPLfCeebLkmf8G4H1MCGrgeq9ty2Tmv4U0fu0YufVDr1WxMXz pTMudECPRkhZPWxtKl1++bsnj15rueVj/WZG1W7d9JKzCnR9ti2BmC/vZZI7ndQ9ek5Q M8nQCo0s0dlEihJ7JGkPS4sIoFW5Fv6HLs6W58kdDOHW/J6fb4meUh8yk6lD9n7d5Ymw yL/ihGQmTHMxqAgjbsWyw4p87kKDXjM/qL2LgbImxKz68/Rv6V+ovEVZJtBC1f/SXNfm NRWQnxvrKPSaJjekFltRUybu5Rb1k73Y98e8EB1lZlK4FrfokI7XQT6JgFRPPGJ6yi7d cIpQ== X-Gm-Message-State: AJIora8b+YqbuljMu+r0/nDHvaf6/foTMUwdyhm414P5UUwtq9Cc9zXH Y9d9/IuclgG5+XTAw7PA2vc= X-Google-Smtp-Source: AGRyM1t7OPKW7PZbAb2gyV/DYZUlzsdR3QqWCthq6pHCgy7hgoIS8GpNVeQjjUpKLMQt6P7ZydXHhg== X-Received: by 2002:adf:e104:0:b0:21b:9938:b07a with SMTP id t4-20020adfe104000000b0021b9938b07amr38373405wrz.682.1657119494202; Wed, 06 Jul 2022 07:58:14 -0700 (PDT) Received: from fedora ([2a01:e0a:1d2:1f90:be95:f3a2:4d99:a3b3]) by smtp.gmail.com with ESMTPSA id v3-20020a5d59c3000000b00210bac248c8sm18593495wry.11.2022.07.06.07.58.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Jul 2022 07:58:13 -0700 (PDT) Date: Wed, 06 Jul 2022 16:58:08 +0200 From: Matthieu CHARETTE Subject: [PATCH] drm: Fix EDID firmware load on resume To: matthieu.charette@gmail.com Cc: matthieu.charette@gmail.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@linux.ie, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Message-Id: X-Mailer: geary/40.0 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Loading an EDID using drm.edid_firmware parameter makes resume to fail after firmware cache is being cleaned. This is because edid_load() use a temporary device to request the firmware. This cause the EDID firmware not to be cached from suspend. And, requesting the EDID firmware return an error during resume. So the request_firmware() call should use a permanent device for each connector. Also, we should cache the EDID even if no monitor is connected, in case it's plugged while suspended. Signed-off-by: Matthieu CHARETTE --- drivers/gpu/drm/drm_connector.c | 9 ++++ drivers/gpu/drm/drm_edid_load.c | 81 ++++++++++++++++++++++++++++----- include/drm/drm_connector.h | 12 +++++ include/drm/drm_edid.h | 3 ++ 4 files changed, 94 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 1c48d162c77e..e8819ebf1c4b 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -31,6 +31,7 @@ #include #include +#include #include #include "drm_crtc_internal.h" @@ -289,6 +290,9 @@ int drm_connector_init(struct drm_device *dev, drm_connector_get_cmdline_mode(connector); + connector->edid_load_pdev = NULL; + drm_cache_edid_firmware(connector); + /* We should add connectors at the end to avoid upsetting the connector * index too much. */ @@ -473,6 +477,11 @@ void drm_connector_cleanup(struct drm_connector *connector) connector->tile_group = NULL; } + if (connector->edid_load_pdev) { + platform_device_unregister(connector->edid_load_pdev); + connector->edid_load_pdev = NULL; + } + list_for_each_entry_safe(mode, t, &connector->probed_modes, head) drm_mode_remove(connector, mode); diff --git a/drivers/gpu/drm/drm_edid_load.c b/drivers/gpu/drm/drm_edid_load.c index 37d8ba3ddb46..5a82be9917ec 100644 --- a/drivers/gpu/drm/drm_edid_load.c +++ b/drivers/gpu/drm/drm_edid_load.c @@ -167,6 +167,19 @@ static int edid_size(const u8 *edid, int data_size) return (edid[0x7e] + 1) * EDID_LENGTH; } +static struct platform_device *edid_pdev(const char *connector_name) +{ + struct platform_device *pdev = platform_device_register_simple(connector_name, -1, NULL, 0); + + if (IS_ERR(pdev)) { + DRM_ERROR("Failed to register EDID firmware platform device " + "for connector \"%s\"\n", connector_name); + return ERR_CAST(pdev); + } + + return pdev; +} + static void *edid_load(struct drm_connector *connector, const char *name, const char *connector_name) { @@ -182,18 +195,17 @@ static void *edid_load(struct drm_connector *connector, const char *name, fwdata = generic_edid[builtin]; fwsize = sizeof(generic_edid[builtin]); } else { - struct platform_device *pdev; + struct platform_device *pdev = connector->edid_load_pdev; int err; - pdev = platform_device_register_simple(connector_name, -1, NULL, 0); - if (IS_ERR(pdev)) { - DRM_ERROR("Failed to register EDID firmware platform device " - "for connector \"%s\"\n", connector_name); - return ERR_CAST(pdev); + if (WARN_ON(!pdev)) { + pdev = edid_pdev(connector_name); + if (IS_ERR(pdev)) + return ERR_CAST(pdev); + connector->edid_load_pdev = pdev; } err = request_firmware(&fw, name, &pdev->dev); - platform_device_unregister(pdev); if (err) { DRM_ERROR("Requesting EDID firmware \"%s\" failed (err=%d)\n", name, err); @@ -263,11 +275,9 @@ static void *edid_load(struct drm_connector *connector, const char *name, return edid; } -struct edid *drm_load_edid_firmware(struct drm_connector *connector) +static char *edid_name(const char *connector_name) { - const char *connector_name = connector->name; char *edidname, *last, *colon, *fwstr, *edidstr, *fallback = NULL; - struct edid *edid; if (edid_firmware[0] == '\0') return ERR_PTR(-ENOENT); @@ -310,8 +320,57 @@ struct edid *drm_load_edid_firmware(struct drm_connector *connector) if (*last == '\n') *last = '\0'; - edid = edid_load(connector, edidname, connector_name); + edidname = kstrdup(edidname, GFP_KERNEL); + if (!edidname) { + kfree(fwstr); + return ERR_PTR(-ENOMEM); + } + kfree(fwstr); + return edidname; +} + +void drm_cache_edid_firmware(struct drm_connector *connector) +{ + const char *connector_name = connector->name; + const char *edidname = edid_name(connector_name); + struct platform_device *pdev; + int err; + + if (IS_ERR(edidname)) + return; + + if (match_string(generic_edid_name, GENERIC_EDIDS, edidname) >= 0) { + kfree(edidname); + return; + } + + pdev = edid_pdev(connector_name); + if (IS_ERR(pdev)) { + kfree(edidname); + return; + } + connector->edid_load_pdev = pdev; + + err = firmware_request_cache(&pdev->dev, edidname); + if (err) + DRM_ERROR("Requesting EDID firmware cache \"%s\" failed (err=%d)\n", + edidname, err); + + kfree(edidname); +} + +struct edid *drm_load_edid_firmware(struct drm_connector *connector) +{ + const char *connector_name = connector->name; + const char *edidname = edid_name(connector_name); + struct edid *edid; + + if (IS_ERR(edidname)) + return ERR_CAST(edidname); + + edid = edid_load(connector, edidname, connector_name); + kfree(edidname); return edid; } diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 3ac4bf87f257..47c84741517e 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -1573,6 +1573,18 @@ struct drm_connector { */ struct i2c_adapter *ddc; + /** + * @edid_load_pdev: Platform device for loading EDID via firmware. + * + * The platform device is registered in drm_connector_init() in case a + * custom EDID firmware is used with `edid_firmware` parameter. Otherwise, + * it is set to NULL. + * + * Platform device is unregistered in drm_connector_cleanup() if it + * is not NULL. + */ + struct platform_device *edid_load_pdev; + /** * @null_edid_counter: track sinks that give us all zeros for the EDID. * Needed to workaround some HW bugs where we get all 0s diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h index b2756753370b..b54cea3f1107 100644 --- a/include/drm/drm_edid.h +++ b/include/drm/drm_edid.h @@ -378,10 +378,13 @@ int drm_av_sync_delay(struct drm_connector *connector, const struct drm_display_mode *mode); #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE +void drm_cache_edid_firmware(struct drm_connector *connector); struct edid *drm_load_edid_firmware(struct drm_connector *connector); int __drm_set_edid_firmware_path(const char *path); int __drm_get_edid_firmware_path(char *buf, size_t bufsize); #else +static inline void +drm_cache_edid_firmware(struct drm_connector *connector); static inline struct edid * drm_load_edid_firmware(struct drm_connector *connector) { -- 2.36.1