From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 E7E1F41D635 for ; Mon, 7 Sep 2026 21:11:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788815485; cv=none; b=T6aoRvbQW7PIhg4Y4tbhO0EfjMaADXs/fldzOKQ7ANslFFk89x40IbDlATT+YZnhguNZsc7I3sV2YDXxZnvuk8Ro5+tfNCTFS0mt+ajIK94XEmPqY9IkNj2ZjNsWgFs3w21Jt08wOoSIdRYEBKjPuXt/MERQzQd7WHuJLrmUKyE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788815485; c=relaxed/simple; bh=WTSjkWf/gMwDD0G9Jxdz3k7VPH7hTuAGBNjTqgsI5l8=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Q4kDCs9P98TKQ1FL+MLbuyXyDqbOvmC5TtMvHUJ1QnA2H0744Z6K6W6YEBlF8fRvs2ug0sS8IY8iG971NbywiaiRwBLEhU6I2Jsa4cTzE39RHDsA+o25DeX9mft0ZS6NDDwaA0QtPOdlijJPZf2wvyN3CvZzmVmvkJ0F+H6Nb3k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=Ho5Y8RPy; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Ho5Y8RPy" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1788815481; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RXVQhrGkg3lXBqNlBJkrZ/ldyJ2zR16o0mRFm8tzu8Q=; b=Ho5Y8RPytOCu54pMhQNddHtlLlxiVp9hI8LdKIipV9YS0PrBpliMo6yIHEpAJEURa5x572 GIKpXYuSe9L31HJHaIqiqa0yybeJYwceskNFhjLkXzksm6VTb6PetyvcvlFf3beZzq7mFg Yio6iD+/moXdjqe6+WLlrlYVynt48z4= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-470-7Wm3Qa-DPQqcit3Nac4qSg-1; Mon, 07 Sep 2026 17:11:20 -0400 X-MC-Unique: 7Wm3Qa-DPQqcit3Nac4qSg-1 X-Mimecast-MFC-AGG-ID: 7Wm3Qa-DPQqcit3Nac4qSg_1788815477 Received: from mx-prod-int-10.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-10.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.95]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 8C2351964CFC; Mon, 7 Sep 2026 21:11:16 +0000 (UTC) Received: from [100.91.157.188] (headnet03.pony-001.prod.iad2.dc.redhat.com [10.2.32.114]) by mx-prod-int-10.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 5075A362; Mon, 7 Sep 2026 21:11:11 +0000 (UTC) Message-ID: <30966123-4b2d-470f-9344-7719bcc9ab3f@redhat.com> Date: Mon, 7 Sep 2026 23:11:07 +0200 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 09/14] drm/panic: Split draw_panic_plane() To: Thomas Zimmermann , javierm@redhat.com, airlied@gmail.com, simona@ffwll.ch, maarten.lankhorst@linux.intel.com, mripard@kernel.org, geert@linux-m68k.org, rdunlap@infradead.org Cc: dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org, amd-gfx@lists.freedesktop.org, rust-for-linux@vger.kernel.org, linux-hyperv@vger.kernel.org, intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, nouveau@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org, virtualization@lists.linux.dev, sashiko-reviews@lists.linux.dev References: <20260902121930.597222-1-tzimmermann@suse.de> <20260902121930.597222-10-tzimmermann@suse.de> Content-Language: en-US, fr From: Jocelyn Falempe In-Reply-To: <20260902121930.597222-10-tzimmermann@suse.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 3.6 on 10.30.177.95 On 9/2/26 14:13, Thomas Zimmermann wrote: > Move locking and parameters from draw_panic_plane() into the new > helper drm_panic_display_panic_screen(). Call draw_panic_plane() from > there. > > The new helper drm_panic_display_panic_screen() is now the DRM core's > interface for displaying a panic screen. The code remaining in > draw_panic_plane() still does all the heavy lifting. It will become a > plane helper for DRM drivers. Thanks, it looks good to me. Reviewed-by: Jocelyn Falempe > > v2: > - use panic_type argument in draw_panic_plane() (Sashiko) > > Signed-off-by: Thomas Zimmermann > --- > drivers/gpu/drm/drm_panic.c | 62 ++++++++++++++++++++----------------- > 1 file changed, 34 insertions(+), 28 deletions(-) > > diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c > index 690e96e8f1f9..624042c42a7f 100644 > --- a/drivers/gpu/drm/drm_panic.c > +++ b/drivers/gpu/drm/drm_panic.c > @@ -936,42 +936,25 @@ static void drm_panic_clear_description(void) > desc_line->txt = NULL; > } > > -static void draw_panic_plane(struct drm_plane *plane, const char *description) > +static void draw_panic_plane(struct drm_plane *plane, const char *description, > + enum drm_panic_type panic_type, u32 fg_color, u32 bg_color, > + unsigned int qr_version) > { > struct drm_scanout_buffer sb = { }; > int ret; > - unsigned long flags; > -#if defined(CONFIG_DRM_PANIC_FOREGROUND_COLOR) > - u32 fg_color = CONFIG_DRM_PANIC_FOREGROUND_COLOR; > -#else > - u32 fg_color = 0x00ffffff; > -#endif > -#if defined(CONFIG_DRM_PANIC_BACKGROUND_COLOR) > - u32 bg_color = CONFIG_DRM_PANIC_BACKGROUND_COLOR; > -#else > - u32 bg_color = 0x00000000; > -#endif > -#if IS_ENABLED(CONFIG_DRM_PANIC_SCREEN_QR_CODE) > - unsigned int qr_version = panic_qr_version; > -#else > - unsigned int qr_version = 0; > -#endif > - > - if (!drm_panic_trylock(plane->dev, flags)) > - return; > > ret = plane->helper_private->get_scanout_buffer(plane, &sb); > > if (ret || !drm_panic_is_format_supported(sb.format)) > - goto unlock; > + return; > > /* One of these should be set, or it can't draw pixels */ > if (!sb.set_pixel && !sb.pages && iosys_map_is_null(&sb.map[0])) > - goto unlock; > + return; > > drm_panic_set_description(description); > > - ret = draw_panic_dispatch(&sb, drm_panic_type, fg_color, bg_color, qr_version); > + ret = draw_panic_dispatch(&sb, panic_type, fg_color, bg_color, qr_version); > if (!ret) { > /* > * Only flush if we have a panic screen to display. Otherwise > @@ -982,9 +965,33 @@ static void draw_panic_plane(struct drm_plane *plane, const char *description) > } > > drm_panic_clear_description(); > +} > > -unlock: > - drm_panic_unlock(plane->dev, flags); > +static void drm_panic_display_panic_screen(struct drm_plane *plane, const char *description) > +{ > +#if defined(CONFIG_DRM_PANIC_FOREGROUND_COLOR) > + u32 fg_color = CONFIG_DRM_PANIC_FOREGROUND_COLOR; > +#else > + u32 fg_color = 0x00ffffff; > +#endif > +#if defined(CONFIG_DRM_PANIC_BACKGROUND_COLOR) > + u32 bg_color = CONFIG_DRM_PANIC_BACKGROUND_COLOR; > +#else > + u32 bg_color = 0x00000000; > +#endif > +#if IS_ENABLED(CONFIG_DRM_PANIC_SCREEN_QR_CODE) > + unsigned int qr_version = panic_qr_version; > +#else > + unsigned int qr_version = 0; > +#endif > + struct drm_device *dev = plane->dev; > + unsigned long flags; > + > + if (drm_panic_trylock(dev, flags)) { > + draw_panic_plane(plane, description, drm_panic_type, > + fg_color, bg_color, qr_version); > + drm_panic_unlock(dev, flags); > + } > } > > static struct drm_plane *to_drm_plane(struct kmsg_dumper *kd) > @@ -997,10 +1004,9 @@ static void drm_panic(struct kmsg_dumper *dumper, struct kmsg_dump_detail *detai > struct drm_plane *plane = to_drm_plane(dumper); > > if (detail->reason == KMSG_DUMP_PANIC) > - draw_panic_plane(plane, detail->description); > + drm_panic_display_panic_screen(plane, detail->description); > } > > - > /* > * DEBUG FS, This is currently unsafe. > * Create one file per plane, so it's possible to debug one plane at a time. > @@ -1017,7 +1023,7 @@ static ssize_t debugfs_trigger_write(struct file *file, const char __user *user_ > if (kstrtobool_from_user(user_buf, count, &run) == 0 && run) { > struct drm_plane *plane = file->private_data; > > - draw_panic_plane(plane, "Test from debugfs"); > + drm_panic_display_panic_screen(plane, "Test from debugfs"); > } > return count; > }