From patchwork Wed Sep 5 18:00:18 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Agner X-Patchwork-Id: 10589233 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 96A011669 for ; Wed, 5 Sep 2018 18:00:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 810BB2A8B9 for ; Wed, 5 Sep 2018 18:00:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7E84A2A8AF; Wed, 5 Sep 2018 18:00:38 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B7A102A840 for ; Wed, 5 Sep 2018 18:00:37 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 893716E0ED; Wed, 5 Sep 2018 18:00:35 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail.kmu-office.ch (mail.kmu-office.ch [IPv6:2a02:418:6a02::a2]) by gabe.freedesktop.org (Postfix) with ESMTPS id 378B56E0ED for ; Wed, 5 Sep 2018 18:00:34 +0000 (UTC) Received: from trochilidae.toradex.int (75-146-58-181-Washington.hfc.comcastbusiness.net [75.146.58.181]) by mail.kmu-office.ch (Postfix) with ESMTPSA id CEB8D5C00FA; Wed, 5 Sep 2018 20:00:31 +0200 (CEST) From: Stefan Agner To: dri-devel@lists.freedesktop.org Subject: [PATCH 1/6] drm/bridge: use bus flags in bridge timings Date: Wed, 5 Sep 2018 11:00:18 -0700 Message-Id: <20180905180025.13282-1-stefan@agner.ch> X-Mailer: git-send-email 2.18.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP 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 --- drivers/gpu/drm/bridge/dumb-vga-dac.c | 6 +++--- include/drm/drm_bridge.h | 11 +++++------ 2 files changed, 8 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/bridge/dumb-vga-dac.c b/drivers/gpu/drm/bridge/dumb-vga-dac.c index 9b706789a341..7a5c24967115 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_POSEDGE, + .bus_flags = DRM_BUS_FLAG_PIXDATA_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_POSEDGE, + .bus_flags = DRM_BUS_FLAG_PIXDATA_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_POSEDGE, + .bus_flags = DRM_BUS_FLAG_PIXDATA_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 bd850747ce54..85d4b51eae19 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -244,14 +244,13 @@ struct drm_bridge_funcs { */ struct drm_bridge_timings { /** - * @sampling_edge: + * @bus_flags: * - * Tells whether the bridge samples the digital input signal - * from the display engine on the positive or negative edge of the - * clock, this should reuse the DRM_BUS_FLAG_PIXDATA_[POS|NEG]EDGE - * bitwise flags from the DRM connector (bit 2 and 3 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 bus_flags; /** * @setup_time_ps: *