From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 41AA2C10F11 for ; Wed, 24 Apr 2019 08:14:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F222E208E4 for ; Wed, 24 Apr 2019 08:14:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="UnSzf0sQ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726232AbfDXIOC (ORCPT ); Wed, 24 Apr 2019 04:14:02 -0400 Received: from perceval.ideasonboard.com ([213.167.242.64]:40802 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727248AbfDXIOC (ORCPT ); Wed, 24 Apr 2019 04:14:02 -0400 Received: from [192.168.43.26] (unknown [149.254.234.198]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 8FD685F; Wed, 24 Apr 2019 10:13:59 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1556093640; bh=LrKPUzqF6J1W7s0xUQqJnMDvhOf4twDomqfLQQb7V7M=; h=Reply-To:Subject:To:Cc:References:From:Date:In-Reply-To:From; b=UnSzf0sQNMwIjt1Hs4Fs8y8LYOgkMJot4mdVf3Mv2INyoewPguFqE5aGpQJ0l7UKu 3LmIQNcrcH+h2F8JCBhD7GEbC6uvwRPAOJBVlUeA1mEEq6S+TSoSSaioQfAgJs0b0g AhNyMB2Ba7wwqlAu2aP1l9qasrQkO4nneP7+AV/c= Reply-To: kieran.bingham@ideasonboard.com Subject: Re: [PATCH/RFC 03/15] drm/bridge: use bus flags in bridge timings To: Laurent Pinchart , dri-devel@lists.freedesktop.org Cc: linux-renesas-soc@vger.kernel.org References: <20190306232345.23052-1-laurent.pinchart+renesas@ideasonboard.com> <20190306232345.23052-4-laurent.pinchart+renesas@ideasonboard.com> From: Kieran Bingham Openpgp: preference=signencrypt Autocrypt: addr=kieran.bingham@ideasonboard.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <20190306232345.23052-4-laurent.pinchart+renesas@ideasonboard.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: 8bit Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Hi Laurent, On 06/03/2019 23:23, Laurent Pinchart wrote: > From: Stefan Agner > > The DRM bus flags convey additional information on pixel data on > the bus. All current available bus flags might be of interest for > a bridge. Remove the sampling_edge field and use bus_flags. > > In the case at hand a dumb VGA bridge needs a specific data enable > polarity (DRM_BUS_FLAG_DE_LOW). > > Signed-off-by: Stefan Agner > Signed-off-by: Laurent Pinchart Trivial but, should you have a +renesas ^ there? > Reviewed-by: Tomi Valkeinen Reviewed-by: Kieran Bingham > --- > drivers/gpu/drm/bridge/dumb-vga-dac.c | 6 +++--- > include/drm/drm_bridge.h | 12 +++++------- > 2 files changed, 8 insertions(+), 10 deletions(-) > > diff --git a/drivers/gpu/drm/bridge/dumb-vga-dac.c b/drivers/gpu/drm/bridge/dumb-vga-dac.c > index 94ed450e308d..e64736c39a9f 100644 > --- a/drivers/gpu/drm/bridge/dumb-vga-dac.c > +++ b/drivers/gpu/drm/bridge/dumb-vga-dac.c > @@ -234,7 +234,7 @@ static int dumb_vga_remove(struct platform_device *pdev) > */ > static const struct drm_bridge_timings default_dac_timings = { > /* Timing specifications, datasheet page 7 */ > - .sampling_edge = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE, > + .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE, > .setup_time_ps = 500, > .hold_time_ps = 1500, > }; > @@ -245,7 +245,7 @@ static const struct drm_bridge_timings default_dac_timings = { > */ > static const struct drm_bridge_timings ti_ths8134_dac_timings = { > /* From timing diagram, datasheet page 9 */ > - .sampling_edge = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE, > + .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE, > /* From datasheet, page 12 */ > .setup_time_ps = 3000, > /* I guess this means latched input */ > @@ -258,7 +258,7 @@ static const struct drm_bridge_timings ti_ths8134_dac_timings = { > */ > static const struct drm_bridge_timings ti_ths8135_dac_timings = { > /* From timing diagram, datasheet page 14 */ > - .sampling_edge = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE, > + .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE, > /* From datasheet, page 16 */ > .setup_time_ps = 2000, > .hold_time_ps = 500, > diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h > index 5e5129206f40..d4428913a4e1 100644 > --- a/include/drm/drm_bridge.h > +++ b/include/drm/drm_bridge.h > @@ -244,15 +244,13 @@ struct drm_bridge_funcs { > */ > struct drm_bridge_timings { > /** > - * @sampling_edge: > + * @input_bus_flags: > * > - * Tells whether the bridge samples the digital input signals from the > - * display engine on the positive or negative edge of the clock. This > - * should use the DRM_BUS_FLAG_PIXDATA_SAMPLE_[POS|NEG]EDGE and > - * DRM_BUS_FLAG_SYNC_SAMPLE_[POS|NEG]EDGE bitwise flags from the DRM > - * connector (bit 2, 3, 6 and 7 valid). > + * Tells what additional settings for the pixel data on the bus > + * this bridge requires (like pixel signal polarity). See also > + * &drm_display_info->bus_flags. > */ > - u32 sampling_edge; > + u32 input_bus_flags; > /** > * @setup_time_ps: > * > -- Regards -- Kieran From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kieran Bingham Subject: Re: [PATCH/RFC 03/15] drm/bridge: use bus flags in bridge timings Date: Wed, 24 Apr 2019 09:13:54 +0100 Message-ID: <6598594c-053b-34ab-2e8a-7f8044b3f29a@ideasonboard.com> References: <20190306232345.23052-1-laurent.pinchart+renesas@ideasonboard.com> <20190306232345.23052-4-laurent.pinchart+renesas@ideasonboard.com> Reply-To: kieran.bingham@ideasonboard.com Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by gabe.freedesktop.org (Postfix) with ESMTPS id 15E0388E33 for ; Wed, 24 Apr 2019 08:14:02 +0000 (UTC) In-Reply-To: <20190306232345.23052-4-laurent.pinchart+renesas@ideasonboard.com> Content-Language: en-GB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Laurent Pinchart , dri-devel@lists.freedesktop.org Cc: linux-renesas-soc@vger.kernel.org List-Id: dri-devel@lists.freedesktop.org SGkgTGF1cmVudCwKCk9uIDA2LzAzLzIwMTkgMjM6MjMsIExhdXJlbnQgUGluY2hhcnQgd3JvdGU6 Cj4gRnJvbTogU3RlZmFuIEFnbmVyIDxzdGVmYW5AYWduZXIuY2g+Cj4gCj4gVGhlIERSTSBidXMg ZmxhZ3MgY29udmV5IGFkZGl0aW9uYWwgaW5mb3JtYXRpb24gb24gcGl4ZWwgZGF0YSBvbgo+IHRo ZSBidXMuIEFsbCBjdXJyZW50IGF2YWlsYWJsZSBidXMgZmxhZ3MgbWlnaHQgYmUgb2YgaW50ZXJl c3QgZm9yCj4gYSBicmlkZ2UuIFJlbW92ZSB0aGUgc2FtcGxpbmdfZWRnZSBmaWVsZCBhbmQgdXNl IGJ1c19mbGFncy4KPiAKPiBJbiB0aGUgY2FzZSBhdCBoYW5kIGEgZHVtYiBWR0EgYnJpZGdlIG5l ZWRzIGEgc3BlY2lmaWMgZGF0YSBlbmFibGUKPiBwb2xhcml0eSAoRFJNX0JVU19GTEFHX0RFX0xP VykuCj4gCj4gU2lnbmVkLW9mZi1ieTogU3RlZmFuIEFnbmVyIDxzdGVmYW5AYWduZXIuY2g+Cj4g U2lnbmVkLW9mZi1ieTogTGF1cmVudCBQaW5jaGFydCA8bGF1cmVudC5waW5jaGFydEBpZGVhc29u 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