From patchwork Thu Nov 17 12:25:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 13046706 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 B3C63C433FE for ; Thu, 17 Nov 2022 12:26:38 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C2E1D10E13E; Thu, 17 Nov 2022 12:26:36 +0000 (UTC) Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) by gabe.freedesktop.org (Postfix) with ESMTPS id A642C10E11E for ; Thu, 17 Nov 2022 12:26:16 +0000 (UTC) Received: from desky.lan (91-154-32-225.elisa-laajakaista.fi [91.154.32.225]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 8A02D1056; Thu, 17 Nov 2022 13:26:14 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1668687975; bh=J7rA5IBGFcu2N7Sh3o6C5ykD706eiPf84CkDTha4nHQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wNY4TSTe80fO5UHNwpmW5p9FeBFOvLGMBpmDKusupfPJBwNft9UY64m20BgSVrMhp OFpQHTJgqxy3ENwgGgvC/Rw2CvUzTEf5+8wf4/qfQsclzSah94HdsJ2eok+E/AHgzi VPSK4RmEw/d0VqMmQIrPhgfWRYFNewVCjC+WBfGg= From: Tomi Valkeinen To: Laurent Pinchart , Kieran Bingham , Rob Herring , Krzysztof Kozlowski , Geert Uytterhoeven , Magnus Damm , dri-devel@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 8/8] HACK: drm: rcar-du: dsi: use-extal-clk hack Date: Thu, 17 Nov 2022 14:25:47 +0200 Message-Id: <20221117122547.809644-9-tomi.valkeinen@ideasonboard.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221117122547.809644-1-tomi.valkeinen@ideasonboard.com> References: <20221117122547.809644-1-tomi.valkeinen@ideasonboard.com> MIME-Version: 1.0 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: Neil Armstrong , Jonas Karlman , Jernej Skrabec , Robert Foss , Andrzej Hajda , Tomi Valkeinen Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Tomi Valkeinen Renesas BSP kernel does this for Whitehawk board. It is not clear what it does, as the bits are marked reserved in the SoC documentation. Do not merge. Signed-off-by: Tomi Valkeinen --- drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c b/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c index 723c35726c38..c264cb689664 100644 --- a/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c +++ b/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c @@ -598,6 +598,10 @@ static int rcar_mipi_dsi_startup(struct rcar_mipi_dsi *dsi, return -ENODEV; } + /* XXX HACK for Whitehawk board. "use_extal_clk" from BSP Kernel. */ + if (dsi->info->model == RCAR_DSI_R8A779G0) + rcar_mipi_dsi_set(dsi, CLOCKSET1, 0x0100000C); + /* PLL Clock Setting */ rcar_mipi_dsi_clr(dsi, CLOCKSET1, CLOCKSET1_SHADOW_CLEAR); rcar_mipi_dsi_set(dsi, CLOCKSET1, CLOCKSET1_SHADOW_CLEAR);