From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sender4-op-o11.zoho.com (sender4-op-o11.zoho.com [136.143.188.11]) (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 5433A313E07 for ; Tue, 16 Jun 2026 19:16:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.11 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781637388; cv=pass; b=u50p1vjeYHKXXNkznNWUS0i7VOWxrizjSN7Qvsbk0LtgXc8ckZSD3SELhRbpMbWu1hXYZgLMXwkEQPOrT7kpTSMIuN9Ayy43KfFBePBCitJB2HVWC0qhlvhNIxoyvZpR9Nl9ANr4OIT+MUKfTD6wQ1dLdoHAV0tm8gcBSbKbVgw= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781637388; c=relaxed/simple; bh=s5GutOUeUR+SwyWw2PnOEkpDh6+Elq8hKiS8W8K/ueI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=d0Hp43u0kWdHNdroTKEdbSJjSnUfMy33zhPu21TW0eqeax8X+sw+/b+8d4HGPtAhncl8HqhRG8AHrj7K+yTLBTYCZWc7DlGerPUCSmUk3l6Z3KSL4E+RP5tE3WFkW7UlexCWyfvzvKSeFQaI5mh72XGTAzXIoVuz5ATE2omH7eQ= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (1024-bit key) header.d=collabora.com header.i=adrian.larumbe@collabora.com header.b=TOTSunRI; arc=pass smtp.client-ip=136.143.188.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=collabora.com header.i=adrian.larumbe@collabora.com header.b="TOTSunRI" ARC-Seal: i=1; a=rsa-sha256; t=1781637367; cv=none; d=zohomail.com; s=zohoarc; b=oD9wBVABTZ06Y9SqLS6//PKJ6HV0Uy0WaPmnugAW07TLRSElvLh8PpkEVxo69uwGPyxmVyfHSQQ9zUxhfOzLKz4HOfBWEENGIKgCO47KiyahbP85JWlDhwN4VxEVsI9eGRAsmEHA94kY/2ttjek0wIjcrMH+IFT0qw64I9Is+co= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1781637367; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=CmM3J7PF5BDdEv47qpyAkCJjv+suDMnpgC8mIrWCUtw=; b=KoAbmNO4fZCOJDZOJ0tJLZYkghiXZr8fqpXt0h06gOe4wD6mHLM6a5S8nMlkZiBNug0i5/Vh6AWwI3qvbFWdMpbp1EszkGUH5n3FbHKlcX+v/nTM1Cfuxmg9B3JIGJtaIyaSK0jtiQa01KowjpaeddoKTBm4jD2U3kGRUVQOgCE= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=adrian.larumbe@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1781637367; s=zohomail; d=collabora.com; i=adrian.larumbe@collabora.com; h=Date:Date:From:From:To:To:Cc:Cc:Subject:Subject:Message-ID:References:MIME-Version:Content-Type:Content-Transfer-Encoding:In-Reply-To:Message-Id:Reply-To; bh=CmM3J7PF5BDdEv47qpyAkCJjv+suDMnpgC8mIrWCUtw=; b=TOTSunRIQL3Y3vL8SlutSjEMcGxQTMJx2m7Hljb8xF9LWyLAV2FBeIVs2veuaPwd +dDzc1r4D+tLKaMyzMmnJGJmSbYaoQWzBg5AY9QujGyPBYokeM7d7BnaGEcnKFn9plv 41O7BX2AH6smH0HOeUyToOG9by6O2ioUcXk6C1tY= Received: by mx.zohomail.com with SMTPS id 1781637364886659.9998836413525; Tue, 16 Jun 2026 12:16:04 -0700 (PDT) Date: Tue, 16 Jun 2026 20:15:59 +0100 From: =?utf-8?Q?Adri=C3=A1n?= Larumbe To: Boris Brezillon Cc: Rob Herring , Steven Price , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Faith Ekstrand , "Marty E. Plummer" , Tomeu Vizoso , Eric Anholt , Alyssa Rosenzweig , Robin Murphy , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Collabora Kernel Team , Neil Armstrong Subject: Re: [PATCH v2 7/7] drm/panfrost: Explicitly enable MMU interrupts at device init Message-ID: References: <20260604-claude-fixes-v2-0-57c6bd4c1655@collabora.com> <20260604-claude-fixes-v2-7-57c6bd4c1655@collabora.com> <20260605085657.1c56998e@fedora-2.home> 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-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260605085657.1c56998e@fedora-2.home> On 05.06.2026 08:56, Boris Brezillon wrote: > On Thu, 04 Jun 2026 18:35:26 +0100 > Adrián Larumbe wrote: > > > Because the device must be in a position to accept jobs between the time > > drm_dev_register() is called and autosuspend first kicks in, there's a very > > narrow window inbetween during which jobs targeting the tiler buffer > > object would time out, since the device's PM status is 'Active', but no MMU > > interrupts were enabled at device initialisation time. > > > > Signed-off-by: Adrián Larumbe > > Fixes: 73e467f60acd ("drm/panfrost: Consolidate reset handling") > > --- > > drivers/gpu/drm/panfrost/panfrost_mmu.c | 11 +++++++++-- > > drivers/gpu/drm/panfrost/panfrost_mmu.h | 2 ++ > > 2 files changed, 11 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c > > index 4a3162c3b659..0e1ad6256c2c 100644 > > --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c > > +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c > > @@ -336,6 +336,12 @@ void panfrost_mmu_as_put(struct panfrost_device *pfdev, struct panfrost_mmu *mmu > > WARN_ON(atomic_read(&mmu->as_count) < 0); > > } > > > > +void panfrost_mmu_enable_interrupts(struct panfrost_device *pfdev) > > +{ > > + mmu_write(pfdev, MMU_INT_CLEAR, ~0); > > + mmu_write(pfdev, MMU_INT_MASK, ~0); > > +} > > + > > void panfrost_mmu_reset(struct panfrost_device *pfdev) > > { > > struct panfrost_mmu *mmu, *mmu_tmp; > > @@ -355,8 +361,7 @@ void panfrost_mmu_reset(struct panfrost_device *pfdev) > > > > spin_unlock(&pfdev->as_lock); > > > > - mmu_write(pfdev, MMU_INT_CLEAR, ~0); > > - mmu_write(pfdev, MMU_INT_MASK, ~0); > > + panfrost_mmu_enable_interrupts(pfdev); > > } > > > > static size_t get_pgsize(u64 addr, size_t size, size_t *count) > > @@ -970,6 +975,8 @@ int panfrost_mmu_init(struct panfrost_device *pfdev) > > return err; > > } > > > > + panfrost_mmu_enable_interrupts(pfdev); > > + > > return 0; > > } > > > > diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.h b/drivers/gpu/drm/panfrost/panfrost_mmu.h > > index 27c3c65ed074..3140eb4fea0f 100644 > > --- a/drivers/gpu/drm/panfrost/panfrost_mmu.h > > +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.h > > @@ -12,6 +12,8 @@ struct panfrost_mmu; > > int panfrost_mmu_map(struct panfrost_gem_mapping *mapping); > > void panfrost_mmu_unmap(struct panfrost_gem_mapping *mapping); > > > > +void panfrost_mmu_enable_interrupts(struct panfrost_device *pfdev); > > You don't need to expose this function, it's only used inside > panfrost_mmu.c. Will remove in the next revision. > > + > > int panfrost_mmu_init(struct panfrost_device *pfdev); > > void panfrost_mmu_fini(struct panfrost_device *pfdev); > > void panfrost_mmu_reset(struct panfrost_device *pfdev); > > Adrian Larumbe