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dmarc=fail (p=quarantine dis=none) header.from=ti.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 542E16E104; Wed, 21 Oct 2020 11:31:55 +0000 (UTC) Received: from fllv0016.ext.ti.com (fllv0016.ext.ti.com [198.47.19.142]) by gabe.freedesktop.org (Postfix) with ESMTPS id F06E06E104 for ; Wed, 21 Oct 2020 11:31:53 +0000 (UTC) Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 09LBVlQw027176; Wed, 21 Oct 2020 06:31:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1603279907; bh=bSm+XbdrrxDgou+V+B5Ey7KPyehT6gn8sO8/XIWyDyA=; h=Subject:To:CC:References:From:Date:In-Reply-To; b=i/H9j7g8tuynNtFuTDqe3AhkBCcz9ABhzZkHtaYQrgu78nrQqA24LQBtO+mhIfVV+ VL2TLD39WrfUOumScgOjir1g3QJjvz2GWFj4+VYIo/uk6hhz8jS4nlHRKkIOwM/0fZ EUYxlUszna3/q2aCaTax2V+lrAi6O9mxVQYfxE5A= Received: from DLEE114.ent.ti.com (dlee114.ent.ti.com [157.170.170.25]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 09LBVlIg078950 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 21 Oct 2020 06:31:47 -0500 Received: from DLEE115.ent.ti.com (157.170.170.26) by DLEE114.ent.ti.com (157.170.170.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Wed, 21 Oct 2020 06:31:47 -0500 Received: from fllv0039.itg.ti.com (10.64.41.19) by DLEE115.ent.ti.com (157.170.170.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Wed, 21 Oct 2020 06:31:46 -0500 Received: from [192.168.2.6] (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 09LBVjkO089719; Wed, 21 Oct 2020 06:31:45 -0500 Subject: Re: [PATCH 3/5] drm: bridge: Propagate the bus flags from bridge->timings To: Nikhil Devshatwar , , Boris Brezillon References: <20201016103917.26838-1-nikhil.nd@ti.com> <20201016103917.26838-4-nikhil.nd@ti.com> From: Tomi Valkeinen Message-ID: Date: Wed, 21 Oct 2020 14:31:44 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20201016103917.26838-4-nikhil.nd@ti.com> Content-Language: en-US X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sekhar Nori , Laurent Pinchart , Swapnil Jakhade Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On 16/10/2020 13:39, Nikhil Devshatwar wrote: > When the next bridge does not specify any bus flags, use the > bridge->timings->input_bus_flags as fallback when propagating > bus flags from next bridge to current bridge. > > Signed-off-by: Nikhil Devshatwar > --- > drivers/gpu/drm/drm_bridge.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c > index 64f0effb52ac..8353723323ab 100644 > --- a/drivers/gpu/drm/drm_bridge.c > +++ b/drivers/gpu/drm/drm_bridge.c > @@ -975,6 +975,13 @@ drm_atomic_bridge_propagate_bus_flags(struct drm_bridge *bridge, > * duplicate the "dummy propagation" logic. > */ > bridge_state->input_bus_cfg.flags = output_flags; > + > + /* > + * Use the bridge->timings->input_bus_flags as fallback if the next bridge > + * does not specify the flags > + */ > + if (!bridge_state->input_bus_cfg.flags) > + bridge_state->input_bus_cfg.flags = bridge->timings->input_bus_flags; According to docs, timings can be NULL. And, hmm... It's too easy to get confused with these, but... If the bridge defines timings, and timings->input_bus_flags != 0, should we always pick that, even if we got something via output_flags? Logic being, if this bridge defines timings->input_bus_flags, it probably wants that to be used regardless whether we got something from the next bridge. Tomi -- Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel