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([2a01:e0a:982:cbb0:af6f:bcbb:3c88:33c2]) by smtp.gmail.com with ESMTPSA id m26-20020a7bca5a000000b0040e54381a85sm14669897wml.26.2024.01.15.00.43.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 15 Jan 2024 00:43:33 -0800 (PST) Message-ID: Date: Mon, 15 Jan 2024 09:43:32 +0100 Precedence: bulk X-Mailing-List: phone-devel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Neil Armstrong Reply-To: neil.armstrong@linaro.org Subject: Re: [PATCH] drm/bridge: Select DRM_KMS_HELPER for DRM_PANEL_BRIDGE Content-Language: en-US, fr To: Luca Weiss , Andrzej Hajda , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter Cc: ~postmarketos/upstreaming@lists.sr.ht, phone-devel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org References: <20240111-drm-panel-bridge-fixup-v1-1-e06292f6f500@fairphone.com> Autocrypt: addr=neil.armstrong@linaro.org; keydata= xsBNBE1ZBs8BCAD78xVLsXPwV/2qQx2FaO/7mhWL0Qodw8UcQJnkrWmgTFRobtTWxuRx8WWP GTjuhvbleoQ5Cxjr+v+1ARGCH46MxFP5DwauzPekwJUD5QKZlaw/bURTLmS2id5wWi3lqVH4 BVF2WzvGyyeV1o4RTCYDnZ9VLLylJ9bneEaIs/7cjCEbipGGFlfIML3sfqnIvMAxIMZrvcl9 qPV2k+KQ7q+aXavU5W+yLNn7QtXUB530Zlk/d2ETgzQ5FLYYnUDAaRl+8JUTjc0CNOTpCeik 80TZcE6f8M76Xa6yU8VcNko94Ck7iB4vj70q76P/J7kt98hklrr85/3NU3oti3nrIHmHABEB AAHNKk5laWwgQXJtc3Ryb25nIDxuZWlsLmFybXN0cm9uZ0BsaW5hcm8ub3JnPsLAkQQTAQoA OwIbIwULCQgHAwUVCgkICwUWAgMBAAIeAQIXgBYhBInsPQWERiF0UPIoSBaat7Gkz/iuBQJk Q5wSAhkBAAoJEBaat7Gkz/iuyhMIANiD94qDtUTJRfEW6GwXmtKWwl/mvqQtaTtZID2dos04 YqBbshiJbejgVJjy+HODcNUIKBB3PSLaln4ltdsV73SBcwUNdzebfKspAQunCM22Mn6FBIxQ GizsMLcP/0FX4en9NaKGfK6ZdKK6kN1GR9YffMJd2P08EO8mHowmSRe/ExAODhAs9W7XXExw UNCY4pVJyRPpEhv373vvff60bHxc1k/FF9WaPscMt7hlkbFLUs85kHtQAmr8pV5Hy9ezsSRa GzJmiVclkPc2BY592IGBXRDQ38urXeM4nfhhvqA50b/nAEXc6FzqgXqDkEIwR66/Gbp0t3+r yQzpKRyQif3OwE0ETVkGzwEIALyKDN/OGURaHBVzwjgYq+ZtifvekdrSNl8TIDH8g1xicBYp QTbPn6bbSZbdvfeQPNCcD4/EhXZuhQXMcoJsQQQnO4vwVULmPGgtGf8PVc7dxKOeta+qUh6+ SRh3vIcAUFHDT3f/Zdspz+e2E0hPV2hiSvICLk11qO6cyJE13zeNFoeY3ggrKY+IzbFomIZY 4yG6xI99NIPEVE9lNBXBKIlewIyVlkOaYvJWSV+p5gdJXOvScNN1epm5YHmf9aE2ZjnqZGoM Mtsyw18YoX9BqMFInxqYQQ3j/HpVgTSvmo5ea5qQDDUaCsaTf8UeDcwYOtgI8iL4oHcsGtUX oUk33HEAEQEAAcLAXwQYAQIACQUCTVkGzwIbDAAKCRAWmrexpM/4rrXiB/sGbkQ6itMrAIfn M7IbRuiSZS1unlySUVYu3SD6YBYnNi3G5EpbwfBNuT3H8//rVvtOFK4OD8cRYkxXRQmTvqa3 3eDIHu/zr1HMKErm+2SD6PO9umRef8V82o2oaCLvf4WeIssFjwB0b6a12opuRP7yo3E3gTCS KmbUuLv1CtxKQF+fUV1cVaTPMyT25Od+RC1K+iOR0F54oUJvJeq7fUzbn/KdlhA8XPGzwGRy 4zcsPWvwnXgfe5tk680fEKZVwOZKIEuJC3v+/yZpQzDvGYJvbyix0lHnrCzq43WefRHI5XTT QbM0WUIBIcGmq38+OgUsMYu4NzLu7uZFAcmp6h8g Organization: Linaro Developer Services In-Reply-To: <20240111-drm-panel-bridge-fixup-v1-1-e06292f6f500@fairphone.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi Luca, On 11/01/2024 13:38, Luca Weiss wrote: > Since the kconfig symbol of DRM_PANEL_BRIDGE is only adding > bridge/panel.o to drm_kms_helper object, we need to select > DRM_KMS_HELPER to make sure the file is actually getting built. > > Otherwise with certain defconfigs e.g. devm_drm_of_get_bridge will not > be properly available: > > aarch64-linux-gnu-ld: drivers/phy/qualcomm/phy-qcom-qmp-combo.o: in function `qmp_combo_bridge_attach': > drivers/phy/qualcomm/phy-qcom-qmp-combo.c:3204:(.text+0x8f4): undefined reference to `devm_drm_of_get_bridge' > > Signed-off-by: Luca Weiss > --- > I can see "depends on DRM_KMS_HELPER" was removed with commit > 3c3384050d68 ("drm: Don't make DRM_PANEL_BRIDGE dependent on DRM_KMS_HELPERS") > > I'm not too familiar with Kconfig but it feels more correct if > PHY_QCOM_QMP_COMBO selects DRM_PANEL_BRIDGE that that's enough; and it > doesn't also has to explicitly select DRM_KMS_HELPER because of how the > objects are built in the Makefile. > > Alternatively solution to this patch could be adjusting this line in > include/drm/drm_bridge.h: > > -#if defined(CONFIG_OF) && defined(CONFIG_DRM_PANEL_BRIDGE) > +#if defined(CONFIG_OF) && defined(CONFIG_DRM_PANEL_BRIDGE) && defined(CONFIG_DRM_KMS_HELPER) > struct drm_bridge *devm_drm_of_get_bridge(struct device *dev, struct device_node *node, > u32 port, u32 endpoint); > > .. and then selecting DRM_KMS_HELPER for PHY_QCOM_QMP_COMBO. > > But I think the solution in this patch is better. Let me know what you > think. I think this is no more the case after on linux-next: 35921910bbd0 phy: qcom: qmp-combo: switch to DRM_AUX_BRIDGE But could you still check ? Neil > --- > drivers/gpu/drm/bridge/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig > index ac9ec5073619..ae782b427829 100644 > --- a/drivers/gpu/drm/bridge/Kconfig > +++ b/drivers/gpu/drm/bridge/Kconfig > @@ -8,6 +8,7 @@ config DRM_BRIDGE > config DRM_PANEL_BRIDGE > def_bool y > depends on DRM_BRIDGE > + select DRM_KMS_HELPER > select DRM_PANEL > help > DRM bridge wrapper of DRM panels > > --- > base-commit: b9c3a1fa6fb324e691a03cf124b79f4842e65d76 > change-id: 20240111-drm-panel-bridge-fixup-5c2977fb969f > > Best regards, 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 464CDC47258 for ; Mon, 15 Jan 2024 08:43:37 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6F7EE10E220; Mon, 15 Jan 2024 08:43:36 +0000 (UTC) Received: from mail-wm1-x334.google.com (mail-wm1-x334.google.com [IPv6:2a00:1450:4864:20::334]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6D6A610E220 for ; Mon, 15 Jan 2024 08:43:35 +0000 (UTC) Received: by mail-wm1-x334.google.com with SMTP id 5b1f17b1804b1-40e80046275so270525e9.2 for ; Mon, 15 Jan 2024 00:43:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1705308214; x=1705913014; darn=lists.freedesktop.org; h=content-transfer-encoding:in-reply-to:organization:autocrypt :references:cc:to:content-language:subject:reply-to:from:user-agent :mime-version:date:message-id:from:to:cc:subject:date:message-id :reply-to; bh=v7trEMMexp/L0cRP5nniRYAU6VEcRUVKr6Xlvoj7OOQ=; b=ckuQ795NrJ7DEIWQPoyQ77APiE/OrdTR9owUw+21rc1rCtnK8ep7RMP6KD5ELxQzOg DKVUYXq2TWm1E5L7x3kb8No0maWtmEAkDQOTzdHZwKU/xJCjaYbq1Mlox0aHY3HJC9KR p1PYZgG1a0uje6D3YzOTd7scRm1YWUBEZf8JXTlqgH1wlilMYJyTuSCGoMb5nFdpG/yK 8J2/Yq3LwrRLjHHJYa60BlHZzuGMnc+pwmTsMzDAYg1clK8344ZN8Me7bdUt9M78eSTr NedL3WFrcMoW5SZSXuVThTErhy29kBfgBPOzIV/YV/13pa+d0L79TMyCepxRAD0/TAoP Ch2Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1705308214; x=1705913014; h=content-transfer-encoding:in-reply-to:organization:autocrypt :references:cc:to:content-language:subject:reply-to:from:user-agent :mime-version:date:message-id:x-gm-message-state:from:to:cc:subject :date:message-id:reply-to; bh=v7trEMMexp/L0cRP5nniRYAU6VEcRUVKr6Xlvoj7OOQ=; b=f9HCpWex+kYM1GnOwuIL8ElUSqy6GxPokYrlAoWlYLWp56ArfSwd0aU2xvDNhgFvFV s4r++/BHm+aKIuzER5iwWN3vE1VbYTYHT9oClszJY42beFB/HS5dm60ja25NsWslKQ6+ 5YIH0MsJaq8Wk60jEeligFWz4XlKdPegdL2oa+BusuZpZP8LqoDKtrXfGiS1R7vlGhm9 wGTOYWy1PDCQvonoDitwFqwvwrRs1otQaQTGS95cz7/RVVqsPlecraYcsusTmemEJYpI TmVBnifayHeWOiA0jU74MH3PdperyLK7FP4TyPFT0CBM3gRA6LrSOOaXtPbx6o149Add pMGA== X-Gm-Message-State: AOJu0YzqKRtZKcBG8nWxcpBCKlkbPFNzW1d4+joN7z4/f+iUxuNxCPL5 DQuFcVg5+Q80p59YbIUUGZRlBm+ua1umhA== X-Google-Smtp-Source: AGHT+IH3YQraSdCl5E7fmni/nnmbQn6D7xvQbHJ4xwymZ9rctQpsSlaYCsbqYXIp3W6UjPUKaCNQtg== X-Received: by 2002:a05:600c:314b:b0:40e:6ee6:6fb with SMTP id h11-20020a05600c314b00b0040e6ee606fbmr1864869wmo.120.1705308213780; Mon, 15 Jan 2024 00:43:33 -0800 (PST) Received: from ?IPV6:2a01:e0a:982:cbb0:af6f:bcbb:3c88:33c2? ([2a01:e0a:982:cbb0:af6f:bcbb:3c88:33c2]) by smtp.gmail.com with ESMTPSA id m26-20020a7bca5a000000b0040e54381a85sm14669897wml.26.2024.01.15.00.43.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 15 Jan 2024 00:43:33 -0800 (PST) Message-ID: Date: Mon, 15 Jan 2024 09:43:32 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Neil Armstrong Subject: Re: [PATCH] drm/bridge: Select DRM_KMS_HELPER for DRM_PANEL_BRIDGE Content-Language: en-US, fr To: Luca Weiss , Andrzej Hajda , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter References: <20240111-drm-panel-bridge-fixup-v1-1-e06292f6f500@fairphone.com> Autocrypt: addr=neil.armstrong@linaro.org; keydata= xsBNBE1ZBs8BCAD78xVLsXPwV/2qQx2FaO/7mhWL0Qodw8UcQJnkrWmgTFRobtTWxuRx8WWP GTjuhvbleoQ5Cxjr+v+1ARGCH46MxFP5DwauzPekwJUD5QKZlaw/bURTLmS2id5wWi3lqVH4 BVF2WzvGyyeV1o4RTCYDnZ9VLLylJ9bneEaIs/7cjCEbipGGFlfIML3sfqnIvMAxIMZrvcl9 qPV2k+KQ7q+aXavU5W+yLNn7QtXUB530Zlk/d2ETgzQ5FLYYnUDAaRl+8JUTjc0CNOTpCeik 80TZcE6f8M76Xa6yU8VcNko94Ck7iB4vj70q76P/J7kt98hklrr85/3NU3oti3nrIHmHABEB AAHNKk5laWwgQXJtc3Ryb25nIDxuZWlsLmFybXN0cm9uZ0BsaW5hcm8ub3JnPsLAkQQTAQoA OwIbIwULCQgHAwUVCgkICwUWAgMBAAIeAQIXgBYhBInsPQWERiF0UPIoSBaat7Gkz/iuBQJk Q5wSAhkBAAoJEBaat7Gkz/iuyhMIANiD94qDtUTJRfEW6GwXmtKWwl/mvqQtaTtZID2dos04 YqBbshiJbejgVJjy+HODcNUIKBB3PSLaln4ltdsV73SBcwUNdzebfKspAQunCM22Mn6FBIxQ GizsMLcP/0FX4en9NaKGfK6ZdKK6kN1GR9YffMJd2P08EO8mHowmSRe/ExAODhAs9W7XXExw UNCY4pVJyRPpEhv373vvff60bHxc1k/FF9WaPscMt7hlkbFLUs85kHtQAmr8pV5Hy9ezsSRa GzJmiVclkPc2BY592IGBXRDQ38urXeM4nfhhvqA50b/nAEXc6FzqgXqDkEIwR66/Gbp0t3+r yQzpKRyQif3OwE0ETVkGzwEIALyKDN/OGURaHBVzwjgYq+ZtifvekdrSNl8TIDH8g1xicBYp QTbPn6bbSZbdvfeQPNCcD4/EhXZuhQXMcoJsQQQnO4vwVULmPGgtGf8PVc7dxKOeta+qUh6+ SRh3vIcAUFHDT3f/Zdspz+e2E0hPV2hiSvICLk11qO6cyJE13zeNFoeY3ggrKY+IzbFomIZY 4yG6xI99NIPEVE9lNBXBKIlewIyVlkOaYvJWSV+p5gdJXOvScNN1epm5YHmf9aE2ZjnqZGoM Mtsyw18YoX9BqMFInxqYQQ3j/HpVgTSvmo5ea5qQDDUaCsaTf8UeDcwYOtgI8iL4oHcsGtUX oUk33HEAEQEAAcLAXwQYAQIACQUCTVkGzwIbDAAKCRAWmrexpM/4rrXiB/sGbkQ6itMrAIfn M7IbRuiSZS1unlySUVYu3SD6YBYnNi3G5EpbwfBNuT3H8//rVvtOFK4OD8cRYkxXRQmTvqa3 3eDIHu/zr1HMKErm+2SD6PO9umRef8V82o2oaCLvf4WeIssFjwB0b6a12opuRP7yo3E3gTCS KmbUuLv1CtxKQF+fUV1cVaTPMyT25Od+RC1K+iOR0F54oUJvJeq7fUzbn/KdlhA8XPGzwGRy 4zcsPWvwnXgfe5tk680fEKZVwOZKIEuJC3v+/yZpQzDvGYJvbyix0lHnrCzq43WefRHI5XTT QbM0WUIBIcGmq38+OgUsMYu4NzLu7uZFAcmp6h8g Organization: Linaro Developer Services In-Reply-To: <20240111-drm-panel-bridge-fixup-v1-1-e06292f6f500@fairphone.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: neil.armstrong@linaro.org Cc: phone-devel@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hi Luca, On 11/01/2024 13:38, Luca Weiss wrote: > Since the kconfig symbol of DRM_PANEL_BRIDGE is only adding > bridge/panel.o to drm_kms_helper object, we need to select > DRM_KMS_HELPER to make sure the file is actually getting built. > > Otherwise with certain defconfigs e.g. devm_drm_of_get_bridge will not > be properly available: > > aarch64-linux-gnu-ld: drivers/phy/qualcomm/phy-qcom-qmp-combo.o: in function `qmp_combo_bridge_attach': > drivers/phy/qualcomm/phy-qcom-qmp-combo.c:3204:(.text+0x8f4): undefined reference to `devm_drm_of_get_bridge' > > Signed-off-by: Luca Weiss > --- > I can see "depends on DRM_KMS_HELPER" was removed with commit > 3c3384050d68 ("drm: Don't make DRM_PANEL_BRIDGE dependent on DRM_KMS_HELPERS") > > I'm not too familiar with Kconfig but it feels more correct if > PHY_QCOM_QMP_COMBO selects DRM_PANEL_BRIDGE that that's enough; and it > doesn't also has to explicitly select DRM_KMS_HELPER because of how the > objects are built in the Makefile. > > Alternatively solution to this patch could be adjusting this line in > include/drm/drm_bridge.h: > > -#if defined(CONFIG_OF) && defined(CONFIG_DRM_PANEL_BRIDGE) > +#if defined(CONFIG_OF) && defined(CONFIG_DRM_PANEL_BRIDGE) && defined(CONFIG_DRM_KMS_HELPER) > struct drm_bridge *devm_drm_of_get_bridge(struct device *dev, struct device_node *node, > u32 port, u32 endpoint); > > .. and then selecting DRM_KMS_HELPER for PHY_QCOM_QMP_COMBO. > > But I think the solution in this patch is better. Let me know what you > think. I think this is no more the case after on linux-next: 35921910bbd0 phy: qcom: qmp-combo: switch to DRM_AUX_BRIDGE But could you still check ? Neil > --- > drivers/gpu/drm/bridge/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig > index ac9ec5073619..ae782b427829 100644 > --- a/drivers/gpu/drm/bridge/Kconfig > +++ b/drivers/gpu/drm/bridge/Kconfig > @@ -8,6 +8,7 @@ config DRM_BRIDGE > config DRM_PANEL_BRIDGE > def_bool y > depends on DRM_BRIDGE > + select DRM_KMS_HELPER > select DRM_PANEL > help > DRM bridge wrapper of DRM panels > > --- > base-commit: b9c3a1fa6fb324e691a03cf124b79f4842e65d76 > change-id: 20240111-drm-panel-bridge-fixup-5c2977fb969f > > Best regards,