From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (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 4B5BC20DD48 for ; Wed, 12 Nov 2025 09:22:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762939373; cv=none; b=uLGmRuXgssqj8FQbmpglfH61QJgxBvFrTughTpGydQv6eOPnCYTYQuSdlA8x0e9M1/l9oySVgRpOTMbHxeurMQ+ABrHtXIfHvcb2l/6pBTosF+taoru40sut5lNjumEKRjHQOGv9sIDqJISvpO2OpefpmqUH46VdgcJe8Dur/Gc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762939373; c=relaxed/simple; bh=FZ/0jtKLUWgbygyUSbN0xOSCJOX3o33PqNVNNKTnnDQ=; h=Message-ID:Date:MIME-Version:Subject:To:References:From:Cc: In-Reply-To:Content-Type; b=Bdu64fyrkSRlI4nhtOH4Ot14DOi0FjitjLN5knHKSSKbDdLX+mrthAkzO0yXl2hEns3Z/T+6cDLuXtOWoVqn5myTm2Ydunos0j4q0swTrERqG9nKs/6ZdP5COzFfO6y7jplqT2jEFW+DwN/gM7FTBtwQYfye+jBU8tZUq8z7zzI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=U2p6h2ff; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="U2p6h2ff" Received: from [192.168.88.20] (91-158-153-178.elisa-laajakaista.fi [91.158.153.178]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 4F6D082E; Wed, 12 Nov 2025 10:20:47 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1762939248; bh=FZ/0jtKLUWgbygyUSbN0xOSCJOX3o33PqNVNNKTnnDQ=; h=Date:Subject:To:References:From:Cc:In-Reply-To:From; b=U2p6h2ffYXJisMvYH5tmIdQvTGEntz98xt7rm/EAE/BsRwoy32GxbGLIXcizC6Uay dFQvOlsMygWVOlGdwCZDs2Z6qLwY7nVTs53y+A79rNIkHiHzI67aAp52FRh4Jlr3EB NOP6Dn3JMBLJBNF+eEC7dV5QNjfmw2/DhFdjgJv4= Message-ID: <3a05be44-97f6-4c0f-b565-0f70947d7fff@ideasonboard.com> Date: Wed, 12 Nov 2025 11:22:43 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v8 6/6] drm/bridge: cadence: cdns-mhdp8546-core: Handle HDCP state in bridge atomic check To: Harikrishna Shenoy References: <20251014094527.3916421-1-h-shenoy@ti.com> <20251014094527.3916421-7-h-shenoy@ti.com> From: Tomi Valkeinen Content-Language: en-US Cc: Laurent.pinchart@ideasonboard.com, airlied@gmail.com, andrzej.hajda@intel.com, andy.yan@rock-chips.com, aradhya.bhatia@linux.dev, devarsht@ti.com, dianders@chromium.org, dri-devel@lists.freedesktop.org, javierm@redhat.com, jernej.skrabec@gmail.com, jonas@kwiboo.se, linux-kernel@vger.kernel.org, linux@treblig.org, luca.ceresoli@bootlin.com, lumag@kernel.org, lyude@redhat.com, maarten.lankhorst@linux.intel.com, mordan@ispras.ru, mripard@kernel.org, neil.armstrong@linaro.org, rfoss@kernel.org, s-jain1@ti.com, simona@ffwll.ch, tzimmermann@suse.de, u-kumar1@ti.com Autocrypt: addr=tomi.valkeinen@ideasonboard.com; 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charset=UTF-8 Content-Transfer-Encoding: 7bit Hi, On 14/10/2025 12:45, Harikrishna Shenoy wrote: > Now that we have DBANC framework and legacy connector functions removed, > handle the HDCP disabling in bridge atomic check rather than in connector > atomic check in !(DBANC) usecase. This sounds odd. The patch is only adding new code, so "handle the HDCP disabling in bridge atomic check rather than in connector atomic check in !(DBANC) usecase." doesn't quite make sense. Afaiu in patch 3 you removed the HDCP code for !DBANC, and here you add it for DBANC. Correct me if I'm wrong, but HDCP support for DBANC is currently broken in upstream, as the HDCP code is only for the !DBANC case? Isn't this patch then similar to patch 2, which is a fix for a missing feature with DBANC? So should this also be a fix, and perhaps be moved as after patch 2? Tomi > Signed-off-by: Harikrishna Shenoy > --- > .../drm/bridge/cadence/cdns-mhdp8546-core.c | 23 +++++++++++++++++++ > 1 file changed, 23 insertions(+) > > diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c > index 06ac5c2ee78f..120eb7ffe20c 100644 > --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c > +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c > @@ -1962,6 +1962,10 @@ static int cdns_mhdp_atomic_check(struct drm_bridge *bridge, > { > struct cdns_mhdp_device *mhdp = bridge_to_mhdp(bridge); > const struct drm_display_mode *mode = &crtc_state->adjusted_mode; > + struct drm_connector_state *old_state, *new_state; > + struct drm_atomic_state *state = crtc_state->state; > + struct drm_connector *conn = mhdp->connector; > + u64 old_cp, new_cp; > > mutex_lock(&mhdp->link_mutex); > > @@ -1981,6 +1985,25 @@ static int cdns_mhdp_atomic_check(struct drm_bridge *bridge, > if (mhdp->info) > bridge_state->input_bus_cfg.flags = *mhdp->info->input_bus_flags; > > + if (conn && mhdp->hdcp_supported) { > + old_state = drm_atomic_get_old_connector_state(state, conn); > + new_state = drm_atomic_get_new_connector_state(state, conn); > + old_cp = old_state->content_protection; > + new_cp = new_state->content_protection; > + > + if (old_state->hdcp_content_type != new_state->hdcp_content_type && > + new_cp != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) { > + new_state->content_protection = DRM_MODE_CONTENT_PROTECTION_DESIRED; > + crtc_state = drm_atomic_get_new_crtc_state(state, new_state->crtc); > + crtc_state->mode_changed = true; > + } > + > + if (!new_state->crtc) { > + if (old_cp == DRM_MODE_CONTENT_PROTECTION_ENABLED) > + new_state->content_protection = DRM_MODE_CONTENT_PROTECTION_DESIRED; > + } > + } > + > mutex_unlock(&mhdp->link_mutex); > return 0; > }