Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751835AbcDUG1s (ORCPT ); Thu, 21 Apr 2016 02:27:48 -0400 Received: from mail-pa0-f53.google.com ([209.85.220.53]:36783 "EHLO mail-pa0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751761AbcDUG1q (ORCPT ); Thu, 21 Apr 2016 02:27:46 -0400 From: Vinay Simha BN Cc: Vinay Simha BN , Archit Taneja , John Stultz , Thierry Reding , Sumit Semwal , David Airlie , dri-devel@lists.freedesktop.org (open list:DRM DRIVERS), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v3] drm/dsi: Implement set tear scanline Date: Thu, 21 Apr 2016 11:56:57 +0530 Message-Id: <1461220017-8897-1-git-send-email-simhavcs@gmail.com> X-Mailer: git-send-email 2.1.2 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 Content-Length: 2370 Lines: 65 Provide a small convenience wrapper that transmits a set_tear_scanline command. Cc: Archit Taneja Cc: John Stultz [thierry.reding: suggested to create helper function (v1)] Cc: Thierry Reding [sumit.semwal: create a single patch for compilation fix (v2)] Cc: Sumit Semwal [vinay simha bn: subject line changed (v3)] Signed-off-by: Vinay Simha BN --- drivers/gpu/drm/drm_mipi_dsi.c | 23 +++++++++++++++++++++++ include/drm/drm_mipi_dsi.h | 2 ++ 2 files changed, 25 insertions(+) diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index f5d8083..2f0b85c 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -983,6 +983,29 @@ 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 + * @param1: STS[10:8] + * @param2: STS[7:0] + * Return: 0 on success or a negative error code on failure + */ +int mipi_dsi_set_tear_scanline(struct mipi_dsi_device *dsi, + u8 param1, u8 param2) +{ + u8 payload[3] = { MIPI_DCS_SET_TEAR_SCANLINE, param1, param2}; + 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..2788dbe 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -263,6 +263,8 @@ 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, u8 param1, + u8 param2); 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); -- 2.1.2