From nobody Sat Sep 26 22:02:17 2026 Received: from cstnet.cn (smtp81.cstnet.cn [159.226.251.81]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C1B2F21257F; Sat, 29 Aug 2026 04:20:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.81 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787977254; cv=none; b=tgooAjjL1nj3k5qSAeYrSi/b+U4jhmACYwwlZj5a0s+vGVqutoSRZTRRaW80J625ZqHA6EFnYEAA1sWj02qp1vcp0tPzInol3NPVIUpM/ucvrXoCuD9r2Z0fibkjDd2QUPaLclMRWWVafjB2WA7++yRWIohP9H4I12W2oeQmTas= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787977254; c=relaxed/simple; bh=NUOo5P7itQaXPFKS+Y8hDdeW53aAqqv9AJSoUQyBIBk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=tHvH1jos7G/oZYt8bIa5JBN9If2f4+MIaKTDQucLglgedFsM2GSzEWKp3C4UDAS200IvnOA+CES4ZbdLdHpS2lYjTmfsK/oI9m2R/BnwleTLaDlsqBBjb53NiR9WGKgADyKOM/kLTe5qVB0XOL5UozDVU9cbwtAldVn5HNeDeZo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from localhost.localdomain (unknown [111.196.241.250]) by APP-03 (Coremail) with SMTP id rQCowACnrjwQXpJqceWEBg--.26773S2; Sat, 29 Aug 2026 12:20:33 +0800 (CST) From: Pengpeng Hou To: Thierry Reding , Mikko Perttunen Cc: Pengpeng Hou , David Airlie , Simona Vetter , Jonathan Hunter , Philipp Zabel , dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] drm/tegra: dc: Propagate powergate failures on suspend Date: Sat, 29 Aug 2026 12:20:30 +0800 Message-ID: <20260829042030.21346-1-pengpeng@iscas.ac.cn> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: rQCowACnrjwQXpJqceWEBg--.26773S2 X-Coremail-Antispam: 1UD129KBjvdXoWrZrWDtF43CFyUCr4kJr13urg_yoWkWFg_ua 1rXrykKw42gFZ8A3ZxZr43ArWIvrWDuF40g340ka1xKry5XwnrK34vgr15CF17Ja1IqFnx J3sxZryvyF1xKjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb3AFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_JFI_Gr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr0_ Cr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVCY1x0267AKxVW8Jr 0_Cr1UM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj 6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr 0_Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E 8cxan2IY04v7MxkF7I0En4kS14v26r1q6r43MxAIw28IcxkI7VAKI48JMxC20s026xCaFV Cjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWl x4CE17CEb7AF67AKxVWUtVW8ZwCIc40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r 1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVWUJVW8JwCI42IY6xAIw20EY4v20xvaj40_Jr0_ JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x0267AKxVWUJVW8JbIYCT nIWIevJa73UjIFyTuYvjfUonmRUUUUU X-CM-SenderInfo: pshqw1xhqjqxpvfd2hldfou0/ Content-Type: text/plain; charset="utf-8" A lifecycle transition can continue after a required state restore operation fails, leaving software state inconsistent with hardware. Propagate the failure and unwind state acquired by the transition so callers cannot observe a false success. Signed-off-by: Pengpeng Hou --- drivers/gpu/drm/tegra/dc.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c index 0b3fcc7011b3..bac78b57dcff 100644 --- a/drivers/gpu/drm/tegra/dc.c +++ b/drivers/gpu/drm/tegra/dc.c @@ -2878,8 +2878,14 @@ static int tegra_dc_runtime_suspend(struct host1x_cl= ient *client) return err; } =20 - if (dc->soc->has_powergate) - tegra_pmc_powergate_power_off(dc->pmc, dc->powergate); + if (dc->soc->has_powergate) { + err =3D tegra_pmc_powergate_power_off(dc->pmc, dc->powergate); + if (err < 0) { + dev_err(dev, "failed to powergate partition: %d\n", err); + reset_control_deassert(dc->rst); + return err; + } + } =20 clk_disable_unprepare(dc->clk); pm_runtime_put_sync(dev); --=20 2.43.0