From patchwork Mon Feb 20 14:08:35 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 9582917 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 AFA3060578 for ; Mon, 20 Feb 2017 14:08:57 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A21102886F for ; Mon, 20 Feb 2017 14:08:57 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 96EBF28875; Mon, 20 Feb 2017 14:08:57 +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=-4.2 required=2.0 tests=BAYES_00, 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 59A8F2886F for ; Mon, 20 Feb 2017 14:08:57 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C72056E401; Mon, 20 Feb 2017 14:08:56 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9DC1C6E403 for ; Mon, 20 Feb 2017 14:08:55 +0000 (UTC) Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 37CDA4621C; Mon, 20 Feb 2017 14:08:56 +0000 (UTC) Received: from shalem.localdomain.com (ovpn-117-9.ams2.redhat.com [10.36.117.9]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id v1KE8lWG022874; Mon, 20 Feb 2017 09:08:55 -0500 From: Hans de Goede To: Daniel Vetter , Jani Nikula , =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Mon, 20 Feb 2017 15:08:35 +0100 Message-Id: <20170220140845.1714-6-hdegoede@redhat.com> In-Reply-To: <20170220140845.1714-1-hdegoede@redhat.com> References: <20170220140845.1714-1-hdegoede@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Mon, 20 Feb 2017 14:08:56 +0000 (UTC) Cc: Hans de Goede , intel-gfx Subject: [Intel-gfx] [PATCH resend 05/15] drm/i915/dsi: Document the panel enable / disable sequences from the spec X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP Document the DSI panel enable / disable sequences from the spec, for easy comparison between the code and the spec. Signed-off-by: Hans de Goede Acked-by: Jani Nikula --- drivers/gpu/drm/i915/intel_dsi.c | 68 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c index 072f99b..8808f87 100644 --- a/drivers/gpu/drm/i915/intel_dsi.c +++ b/drivers/gpu/drm/i915/intel_dsi.c @@ -552,6 +552,74 @@ static void intel_dsi_prepare(struct intel_encoder *intel_encoder, struct intel_crtc_state *pipe_config); static void intel_dsi_unprepare(struct intel_encoder *encoder); +/* + * Panel enable/disable sequences from the VBT spec. + * + * Note the spec has AssertReset / DeassertReset swapped from their + * usual naming. We use the normal names to avoid confusion (so below + * they are swapped compared to the spec). + * + * v2 sequence for video mode: + * - power on + * - wait t1+t2 + * - MIPIDeassertResetPin + * - clk/data lines to lp-11 + * - MIPISendInitialDcsCmds + * - turn on DPI + * - MIPIDisplayOn + * - wait t5 + * - backlight on + * ... + * - backlight off + * - wait t6 + * - MIPIDisplayOff + * - turn off DPI + * - clk/data lines to lp-00 + * - MIPIAssertResetPin + * - wait t3 + * - power off + * - wait t4 + * + * v3 sequence for video mode: + * - MIPIPanelPowerOn + * - MIPIDeassertResetPin + * - set clk/data lines to lp-11 + * - MIPISendInitialDcsCmds (LP) + * - turn on DPI + * - MIPITearOn (command mode only) + MIPIDisplayOn (LP and HS) + * - MIPIBacklightOn + * ... + * - MIPIBacklightOff + * - turn off DPI + * - MIPITearOff + MIPIDisplayOff (LP) + * - clk/data lines to lp-00 + * - MIPIAssertResetPin + * - MIPIPanelPowerOff + * + * sequence for command mode: + * - power on + * - wait t1+t2 + * - MIPIDeassertResetPin + * - clk/data lines to lp-11 + * - MIPISendInitialDcsCmds + * - MIPITearOn + * - MIPIDisplayOn + * - set pipe to dsr mode + * - wait t5 + * - backlight on + * ... issue write_mem_start/write_mem_continue commands ... + * - backlight off + * - wait t6 + * - disable pipe dsr mode + * - MIPITearOff + * - MIPIDisplayOff + * - clk/data lines to lp-00 + * - MIPIAssertResetPin + * - wait t3 + * - power off + * - wait t4 + */ + static void intel_dsi_pre_enable(struct intel_encoder *encoder, struct intel_crtc_state *pipe_config, struct drm_connector_state *conn_state)