From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752750AbcFFRlw (ORCPT ); Mon, 6 Jun 2016 13:41:52 -0400 Received: from mail-pa0-f65.google.com ([209.85.220.65]:33377 "EHLO mail-pa0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752103AbcFFRlv (ORCPT ); Mon, 6 Jun 2016 13:41:51 -0400 From: Vinay Simha BN Cc: Vinay Simha BN , Archit Taneja , John Stultz , Thierry Reding , Sumit Semwal , Jani Nikula , David Airlie , dri-devel@lists.freedesktop.org (open list:DRM DRIVERS), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v2] drm/dsi: Implement set tear scanline Date: Mon, 6 Jun 2016 23:11:37 +0530 Message-Id: <1465234897-21365-1-git-send-email-simhavcs@gmail.com> X-Mailer: git-send-email 1.9.1 To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Provide a small convenience wrapper that transmits a set_tear_scanline command. Also includes small build fixes from Sumit Semwal. Cc: Archit Taneja Cc: John Stultz Cc: Thierry Reding Cc: Sumit Semwal Cc: Jani Nikula Signed-off-by: Vinay Simha BN -- v1: * helper function suggested by Thierry for set_tear_scanline v2: * one scanline parameter suggested by jani --- drivers/gpu/drm/drm_mipi_dsi.c | 22 ++++++++++++++++++++++ include/drm/drm_mipi_dsi.h | 1 + 2 files changed, 23 insertions(+) diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index f5d8083..c02d083 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -983,6 +983,28 @@ int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi, EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_on); /** + * mipi_dsi_set_tear_scanline() - turn on the display module's Tearing Effect + * output signal on the TE signal line when display module reaches line N + * defined by STS[n:0]. + * @dsi: DSI peripheral device + * @param: STS[10:0] + * Return: 0 on success or a negative error code on failure + */ +int mipi_dsi_set_tear_scanline(struct mipi_dsi_device *dsi, u16 param) +{ + u8 payload[3] = { MIPI_DCS_SET_TEAR_SCANLINE, param >> 8, + param & 0xff }; + ssize_t err; + + err = mipi_dsi_generic_write(dsi, &payload, sizeof(payload)); + if (err < 0) + return err; + + return 0; +} +EXPORT_SYMBOL(mipi_dsi_set_tear_scanline); + +/** * mipi_dsi_dcs_set_pixel_format() - sets the pixel format for the RGB image * data used by the interface * @dsi: DSI peripheral device diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 7a9840f..ec55285 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -263,6 +263,7 @@ int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start, u16 end); int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start, u16 end); +int mipi_dsi_set_tear_scanline(struct mipi_dsi_device *dsi, u16 param); int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi); int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi, enum mipi_dsi_dcs_tear_mode mode); -- 1.9.1