From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thierry Reding Subject: [PATCH 09/15] drm/dsi: Implement DCS soft_reset command Date: Mon, 13 Oct 2014 12:16:29 +0200 Message-ID: <1413195395-3355-9-git-send-email-thierry.reding@gmail.com> References: <1413195395-3355-1-git-send-email-thierry.reding@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-wg0-f46.google.com (mail-wg0-f46.google.com [74.125.82.46]) by gabe.freedesktop.org (Postfix) with ESMTP id 5302989D2F for ; Mon, 13 Oct 2014 03:16:52 -0700 (PDT) Received: by mail-wg0-f46.google.com with SMTP id l18so8316912wgh.5 for ; Mon, 13 Oct 2014 03:16:51 -0700 (PDT) In-Reply-To: <1413195395-3355-1-git-send-email-thierry.reding@gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org Cc: Andrzej Hajda List-Id: dri-devel@lists.freedesktop.org From: Thierry Reding Provide a small convenience wrapper that transmits a DCS soft_reset command. Signed-off-by: Thierry Reding --- drivers/gpu/drm/drm_mipi_dsi.c | 18 ++++++++++++++++++ include/drm/drm_mipi_dsi.h | 1 + 2 files changed, 19 insertions(+) diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index c88dcda2f4ac..60bd68b520ae 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -535,6 +535,24 @@ int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi) EXPORT_SYMBOL(mipi_dsi_dcs_nop); /** + * mipi_dsi_dcs_soft_reset() - perform a software reset of the display module + * @dsi: DSI peripheral device + * + * Return: 0 on success or a negative error code on failure. + */ +int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi) +{ + ssize_t err; + + err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SOFT_RESET, NULL, 0); + if (err < 0) + return err; + + return 0; +} +EXPORT_SYMBOL(mipi_dsi_dcs_soft_reset); + +/** * mipi_dsi_dcs_enter_sleep_mode() - disable all unnecessary blocks inside the * display module except interface communication * @dsi: DSI peripheral device diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index be16c8e769bd..2afbd5853f78 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -171,6 +171,7 @@ ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd, ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data, size_t len); int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi); +int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi); int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi); int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi); int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi); -- 2.1.2