From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out198-23.us.a.mail.aliyun.com (out198-23.us.a.mail.aliyun.com [47.90.198.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 09A0A4EA364; Tue, 12 May 2026 06:40:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=47.90.198.23 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778568055; cv=none; b=l6sV2r+qcSH8lNzk81ww61U492I9iFkkX9qruOB9iIdG7Tz90IgwaD0ZwuNCW06rtyYdSHm6SZ9ScsnLdg1gsAMwe1nrCNj7/vqy9Jws2hGcAeZ2/ZKXxOneJ2n4Kk2wwPheWhETXna1fcLgXYQLeUJ2ym17PwcEwdc52IQZ/48= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778568055; c=relaxed/simple; bh=f3wKg8R35TS4gMhiVc/cHw1X44qSCFe4iPAa/tXPFrI=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version:Content-Type; b=jdHxkVzkhO7sQI1UJ5RX+uOJ3bzvZXiza4esdOqFZOGdFTIcjeMdFpi1qelc5hsQrtuZMakq3ATNbTJhIy2pPcvoOIZO4LBYBq/SDsP2zcLsE8HfJkbtonFlNMDTPfn7KQTwUPBLxeArkcLiZ/hvTi+OR+2DKl+TncSr2IVfgf4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lontium.com; spf=pass smtp.mailfrom=lontium.com; dkim=pass (2048-bit key) header.d=lontium.com header.i=@lontium.com header.b=cbWNv0eU; arc=none smtp.client-ip=47.90.198.23 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lontium.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lontium.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=lontium.com header.i=@lontium.com header.b="cbWNv0eU" DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=lontium.com; s=default; t=1778568020; h=From:To:Subject:Date:Message-Id:MIME-Version:Content-Type; bh=JW+7j7UCki/gpLvrThuhrppT/b1Nb9OAApGo1N8SQUE=; b=cbWNv0eUQLG/nb6oqCI+fzbj7k+xwkaO+g3l8VIWgiQBwVul96+Ld3t16fU7fF5Tr/vkiy60lkRgXsK731a3G0e2KD8FmI/g7fTuRVvGOUZPKuvt/BPUiogUh5srjDLg37tnE8Vvzo49S0xDpIXcrdDIxcc5qy+ZgFpI1q9AoylmPMyJmyATKhdLg1j0NB9w1MrAXXY7mv8qjCScEgzFTTseklHOW5Do2ttEwcJGrri5ZFX0Ln9QC/bKi7e4H37RFghuN1nbDh5MebQtmP0GdEKerIndqCSSJD+1Bkm05QCPBoV1ndd1BAy3MZgJOVHy0We3UVwHNqadUt/LJOJ1VA== X-Alimail-AntiSpam:AC=CONTINUE;BC=0.08034152|-1;CH=green;DM=|CONTINUE|false|;DS=CONTINUE|ham_system_inform|0.00515962-0.000134268-0.994706;FP=7586586509019170168|0|0|0|0|-1|-1|-1;HT=maildocker-contentspam033045213054;MF=syyang@lontium.com;NM=1;PH=DS;RN=21;RT=21;SR=0;TI=SMTPD_---.hVBka-7_1778568017; Received: from DESKTOP-V2MKAT2.localdomain(mailfrom:syyang@lontium.com fp:SMTPD_---.hVBka-7_1778568017 cluster:ay29) by smtp.aliyun-inc.com; Tue, 12 May 2026 14:40:18 +0800 From: syyang@lontium.com To: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andrzej.hajda@intel.com, neil.armstrong@linaro.org, dmitry.baryshkov@oss.qualcomm.com, maarten.lankhorst@linux.intel.com, rfoss@kernel.org, mripard@kernel.org Cc: Laurent.pinchart@ideasonboard.com, tzimmermann@suse.de, jonas@kwiboo.se, jernej.skrabec@gmail.com, devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, xmzhu@lontium.corp-partner.google.com, xmzhu@lontium.com, rlyu@lontium.com, xbpeng@lontium.com, Sunyun Yang Subject: [PATCH v7 0/2] Add Lontium LT7911EXC eDP to MIPI DSI bridge Date: Tue, 12 May 2026 14:40:11 +0800 Message-Id: <20260512064013.40066-1-syyang@lontium.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Sunyun Yang The LT7911EXC is an I2C-controlled bridge that receives eDP1.4 and output mipi dsi. This series introduces: - A device tree binding YAML file describing the hardware - A new DRM bridge driver implementing the basic functionality Signed-off-by: Sunyun Yang --- Change in v7: - dt-binding: 1. fix commit message typos(Receiver、signal) [sashiko-bot] 2. remove the ambiguity caused by "signal/dual". - drm/bridge: 1. using devm_regulator_get_enable avoids power leaks. [sashiko-bot] 2. set reset gpio is low after cutting off power in lt7911exc_remove function, avoid backpowering. 3. synchronous request_firmware() call cause a permanent probe failure if the driver is built-in, probe executes before the root filesystem is mounted, which would cause this to fail with -ENOENT, we have removed this functionality. Use trigger to upgrade. 4. add `depends on I2C` and `select REGMAP_I2C` in Kconfig. 5. add return value of `devm_drm_bridge_add()` in `probe()`. 6. add directly header files (linux/slab.h, linux/delay.h, linux/regulator/consumer.h) - Link to v6: https://lore.kernel.org/lkml/20260508134702.4713-1-syyang@lontium.com/ Change in v6: - dt-binding: - drm/bridge: 1. use #define FW_FILE "Lontium/lt7911exc_fw.bin" to match linux-firmware - Link to v5: https://lore.kernel.org/lkml/20260506013153.2240-1-syyang@lontium.com/ Change in v5: - dt-binding: - drm/bridge: 1. Change "mipi" to "mipi dsi" in the commit message. [Dmitry] 2. Change "eDP/MIPI" to "eDP/MIPI DSI" in Kconfig. - Link to v4: https://lore.kernel.org/lkml/20260430094612.3408174-1-syyang@lontium.com/ Change in v4: - dt-binding: 1. Fix the missing spaces on the "subject". [Krzysztof] 2. Fix the error descriptions for port@0 and port@1. - drm/bridge: - Link to v3: https://lore.kernel.org/lkml/20260429040541.3404116-1-syyang@lontium.com/ Change in v3: - dt-binding: - drm/bridge: 1. already submit lt7911exc_fw.bin to linux-firmware. [Dmitry] 2. remove lt7911exc_remove function. 3. drop the "lontium, " in lt7911exc_i2c_table. - Link to v2: https://lore.kernel.org/lkml/20260428063224.3316655-1-syyang@lontium.com/ Change in v2: - dt-binding: 1. reset pins use active low. [Dmitry] - drm/bridge: 1. use atomic_* callbacks. [Quentin] 2. fix the incorrect formatting and spaces. 3. add the required header files. [Dmitry] 4. remove "enabled" flag. 5. remove *fw from the lt7911exc struct. 6. .max_register and .range_max use actual range. 7. regulator use bulk interface. 8. use dev_err_probe, devm_mutex_init and devm_drm_bridge_add. 9. Replace GPL v2 with GPL. - Link to v1: https://lore.kernel.org/lkml/20260420023354.1192642-1-syyang@lontium.com/ --- Sunyun Yang (2): dt-bindings: bridge: Add Lontium LT7911EXC eDP to MIPI DSI bridge drm/bridge: Add Lontium LT7911EXC eDP to MIPI DSI bridge .../display/bridge/lontium,lt7911exc.yaml | 89 +++ drivers/gpu/drm/bridge/Kconfig | 15 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/lontium-lt7911exc.c | 514 ++++++++++++++++++ 4 files changed, 619 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/bridge/lontium,lt7911exc.yaml create mode 100644 drivers/gpu/drm/bridge/lontium-lt7911exc.c -- 2.34.1