From patchwork Mon Feb 11 14:41:22 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 10805987 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 3003D1390 for ; Mon, 11 Feb 2019 14:41:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1F60F2A88B for ; Mon, 11 Feb 2019 14:41:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1DB972A88C; Mon, 11 Feb 2019 14:41:48 +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,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B3C152A893 for ; Mon, 11 Feb 2019 14:41:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=BfHNjkZdOPIM2CBbO8FN3iVRYh+p2fMjfjC0LQUhw/U=; b=nXPNGnrE3ChGdp t6cPAYp32IgE3tu6Vkfo4GqsoSdcOwVtJhVV/QCUc3NOz90QEeS0lW9yGLwK+XlmP4GP8cVAJ1IM2 V1nbS9mGNRWbDJoTUrM9Khg+sFNP5ICV/lakknu6CILJsXavNzA4i1nuSplsSC1YCJLAqhzJkOGfd q4+iunxykPWeoFzB6BNlNqppC9+a2D8DtvkuHeFNvfpmI89XQT+o1LfK4VULbzN64ukctZ1oMYVqH TTu+odo7z6ctk4+J23HoO1+vCRiyb31UxmS+CykZTovxfwdOu1GI33wDsmmz1VjnEQ/ltpDAzxi9N 9o7ENSudlp4RR5badGHg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gtCmD-0004pg-28; Mon, 11 Feb 2019 14:41:41 +0000 Received: from relay9-d.mail.gandi.net ([217.70.183.199]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gtCm9-0004oo-OM for linux-arm-kernel@lists.infradead.org; Mon, 11 Feb 2019 14:41:39 +0000 X-Originating-IP: 185.94.189.187 Received: from localhost (unknown [185.94.189.187]) (Authenticated sender: maxime.ripard@bootlin.com) by relay9-d.mail.gandi.net (Postfix) with ESMTPSA id 73BFFFF80B; Mon, 11 Feb 2019 14:41:34 +0000 (UTC) From: Maxime Ripard To: Maarten Lankhorst , Sean Paul , Maxime Ripard Subject: [PATCH v3 1/8] drm/sun4i: dsi: Restrict DSI tcon clock divider Date: Mon, 11 Feb 2019 15:41:22 +0100 Message-Id: <074e88ae472f5e0492e26939c74b44fb4125ffbd.1549896081.git-series.maxime.ripard@bootlin.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190211_064137_935159_1A94B67C X-CRM114-Status: GOOD ( 12.70 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: bbrezillon@kernel.org, dri-devel@lists.freedesktop.org, Paul Kocialkowski , Chen-Yu Tsai , Thomas Petazzoni , Jagan Teki , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The current code allows the TCON clock divider to have a range between 4 and 127 when feeding the DSI controller. The only display supported so far had a display clock rate that ended up using a divider of 4, but testing with other displays show that only 4 seems to be functional. This also aligns with what Allwinner is doing in their BSP, so let's just hardcode that we want a divider of 4 when using the DSI output. Reviewed-by: Paul Kocialkowski Signed-off-by: Maxime Ripard --- drivers/gpu/drm/sun4i/sun4i_tcon.c | 4 ++-- drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h | 2 ++ 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c index 0420f5c978b9..bee73ead732a 100644 --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c @@ -341,8 +341,8 @@ static void sun4i_tcon0_mode_set_cpu(struct sun4i_tcon *tcon, u32 block_space, start_delay; u32 tcon_div; - tcon->dclk_min_div = 4; - tcon->dclk_max_div = 127; + tcon->dclk_min_div = SUN6I_DSI_TCON_DIV; + tcon->dclk_max_div = SUN6I_DSI_TCON_DIV; sun4i_tcon0_mode_set_common(tcon, mode); diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h index dbbc5b3ecbda..6d4a3c0fd9b5 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h @@ -13,6 +13,8 @@ #include #include +#define SUN6I_DSI_TCON_DIV 4 + struct sun6i_dphy { struct clk *bus_clk; struct clk *mod_clk;