From patchwork Fri Sep 29 08:22:56 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen-Yu Tsai X-Patchwork-Id: 9977217 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id B014860365 for ; Fri, 29 Sep 2017 08:23:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9EF7628397 for ; Fri, 29 Sep 2017 08:23:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 932FD297C8; Fri, 29 Sep 2017 08:23:24 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1408428397 for ; Fri, 29 Sep 2017 08:23:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751910AbdI2IXX (ORCPT ); Fri, 29 Sep 2017 04:23:23 -0400 Received: from mirror2.csie.ntu.edu.tw ([140.112.30.76]:53802 "EHLO wens.csie.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751801AbdI2IXV (ORCPT ); Fri, 29 Sep 2017 04:23:21 -0400 Received: by wens.csie.org (Postfix, from userid 1000) id EB23E60067; Fri, 29 Sep 2017 16:23:17 +0800 (CST) From: Chen-Yu Tsai To: Mark Brown , Maxime Ripard , David Airlie , Michael Turquette , Stephen Boyd , Rob Herring , Mark Rutland Cc: Chen-Yu Tsai , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com Subject: [PATCH v3 04/14] drm/sun4i: tcon: Add support for demuxing TCON output on A31 Date: Fri, 29 Sep 2017 16:22:56 +0800 Message-Id: <20170929082306.16193-5-wens@csie.org> X-Mailer: git-send-email 2.14.2 In-Reply-To: <20170929082306.16193-1-wens@csie.org> References: <20170929082306.16193-1-wens@csie.org> Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP On systems with 2 TCONs such as the A31, it is possible to demux the output of the TCONs to one encoder. Add support for this for the A31. Signed-off-by: Chen-Yu Tsai --- drivers/gpu/drm/sun4i/sun4i_tcon.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c index 7bf51abaee97..c949309d4285 100644 --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c @@ -112,6 +112,21 @@ void sun4i_tcon_enable_vblank(struct sun4i_tcon *tcon, bool enable) } EXPORT_SYMBOL(sun4i_tcon_enable_vblank); +static struct sun4i_tcon *sun4i_get_first_tcon(struct drm_device *drm) +{ + struct sun4i_drv *drv = drm->dev_private; + struct sun4i_tcon *tcon; + + list_for_each_entry(tcon, &drv->tcon_list, list) + if (tcon->id == 0) + return tcon; + + dev_warn(drm->dev, + "TCON0 not found, display output muxing may not work\n"); + + return tcon; +} + void sun4i_tcon_set_mux(struct sun4i_tcon *tcon, int channel, struct drm_encoder *encoder) { @@ -777,6 +792,28 @@ static int sun5i_a13_tcon_set_mux(struct sun4i_tcon *tcon, return regmap_write(tcon->regs, SUN4I_TCON_MUX_CTRL_REG, val); } +static int sun6i_tcon_set_mux(struct sun4i_tcon *tcon, + struct drm_encoder *encoder) +{ + struct sun4i_tcon *tcon0 = sun4i_get_first_tcon(encoder->dev); + u32 shift; + + switch (encoder->encoder_type) { + case DRM_MODE_ENCODER_TMDS: + /* HDMI */ + shift = 8; + break; + default: + /* TODO A31 has MIPI DSI but A31s does not */ + return -EINVAL; + } + + regmap_update_bits(tcon0->regs, SUN4I_TCON_MUX_CTRL_REG, + 0x3 << shift, tcon->id << shift); + + return 0; +} + static const struct sun4i_tcon_quirks sun5i_a13_quirks = { .has_unknown_mux = true, .has_channel_1 = true, @@ -786,6 +823,7 @@ static const struct sun4i_tcon_quirks sun5i_a13_quirks = { static const struct sun4i_tcon_quirks sun6i_a31_quirks = { .has_channel_1 = true, .needs_de_be_mux = true, + .set_mux = sun6i_tcon_set_mux, }; static const struct sun4i_tcon_quirks sun6i_a31s_quirks = {