From patchwork Wed Mar 9 07:36:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?UmV4LUJDIENoZW4gKOmZs+afj+i+sCk=?= X-Patchwork-Id: 12774811 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DB2EBC433EF for ; Wed, 9 Mar 2022 07:39:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=34+TgoDD7AvCaFeMkGUDiYA6Sx31n6DWWSBomkw/crg=; b=J9xmg5B607AR0Z PH0iEC+3Q3hegVoaSti6cBwZYTWDPiF06r9zCu2IHaAlDkL9MjD45V63V9s8PsbJKJ60RdAWFV/dh 1GflE/otQOIL0ENQ3gOP01VZLSab0fcIVXAuQmxKGQrUF8cnBiazkwpdxG5eEsuFfXVI5FEVs4Osx /bMydX7aHJ2jfZF/HuuexwK70EYXzNrhur0N/rPCPeuoLHvOd1KkBnPIKW0YKC0BpVBTPqI77D6oU 2Ews6sLj2pdWl1izaiikolm71S/mwRZqv4fE6MrQ7Ug4ufRxjJFo60eh7o3yXuCS1JT7yLU0JIGRN p/2s0rMpzIhpnrwS0HaA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nRquR-007d21-TM; Wed, 09 Mar 2022 07:38:59 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nRquD-007cxu-94; Wed, 09 Mar 2022 07:38:47 +0000 X-UUID: b784c21a82da4bfc950be60aec871063-20220309 X-UUID: b784c21a82da4bfc950be60aec871063-20220309 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1654864655; Wed, 09 Mar 2022 00:38:38 -0700 Received: from mtkmbs07n1.mediatek.inc (172.21.101.16) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 8 Mar 2022 23:36:40 -0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 9 Mar 2022 15:36:39 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 9 Mar 2022 15:36:39 +0800 From: Rex-BC Chen To: , , , , , , , , , , CC: , , , , , , , , , , Rex-BC Chen Subject: [RESEND V11 1/3] drm/dsi: transfer DSI HS packets ending at the same time Date: Wed, 9 Mar 2022 15:36:35 +0800 Message-ID: <20220309073637.3591-2-rex-bc.chen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220309073637.3591-1-rex-bc.chen@mediatek.com> References: <20220309073637.3591-1-rex-bc.chen@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220308_233845_333214_4F945608 X-CRM114-Status: GOOD ( 10.73 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Since a HS transmission is composed of an arbitrary number of bytes that may not be an integer multiple of lanes, some lanes may run out of data before others. (Defined in 6.1.3 of mipi_DSI_specification_v.01-02-00) However, for some DSI RX devices (for example, anx7625), there is a limitation that packet number should be the same on all DSI lanes. In other words, they need to end a HS at the same time. Because this limitation is for some specific DSI RX devices, it is more reasonable to put the enable control in these DSI RX drivers. If DSI TX driver knows the information, they can adjust the setting for this situation. Signed-off-by: Jitao Shi Signed-off-by: Rex-BC Chen Acked-by: AngeloGioacchino Del Regno Reviewed-by: Andrzej Hajda --- include/drm/drm_mipi_dsi.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 147e51b6d241..51e09a1a106a 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -137,6 +137,8 @@ struct mipi_dsi_host *of_find_mipi_dsi_host_by_node(struct device_node *node); #define MIPI_DSI_CLOCK_NON_CONTINUOUS BIT(10) /* transmit data in low power */ #define MIPI_DSI_MODE_LPM BIT(11) +/* transmit data ending at the same time for all lanes within one hsync */ +#define MIPI_DSI_HS_PKT_END_ALIGNED BIT(12) enum mipi_dsi_pixel_format { MIPI_DSI_FMT_RGB888,