From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thierry Reding Subject: [PATCH 12/15] drm/dsi: Implement DCS set_{column, page}_address commands Date: Mon, 13 Oct 2014 12:16:32 +0200 Message-ID: <1413195395-3355-12-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-wi0-f180.google.com (mail-wi0-f180.google.com [209.85.212.180]) by gabe.freedesktop.org (Postfix) with ESMTP id 71F0589F2E for ; Mon, 13 Oct 2014 03:16:57 -0700 (PDT) Received: by mail-wi0-f180.google.com with SMTP id em10so6973228wid.7 for ; Mon, 13 Oct 2014 03:16:56 -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 small convenience wrappers to set the column and page extents of the frame memory accessed by the host processors. Signed-off-by: Thierry Reding --- drivers/gpu/drm/drm_mipi_dsi.c | 46 ++++++++++++++++++++++++++++++++++++++++++ include/drm/drm_mipi_dsi.h | 4 ++++ 2 files changed, 50 insertions(+) diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index d7ca57f1fdd3..d4d3cf752be7 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -671,6 +671,52 @@ int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi) EXPORT_SYMBOL(mipi_dsi_dcs_set_display_on); /** + * mipi_dsi_dcs_set_column_address() - define the column extent of the frame + * memory accessed by the host processor + * @dsi: DSI peripheral device + * @start: first column of frame memory + * @end: last column of frame memory + * + * Return: 0 on success or a negative error code on failure. + */ +int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start, + u16 end) +{ + u8 payload[4] = { start >> 8, start & 0xff, end >> 8, end & 0xff }; + ssize_t err; + + err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_COLUMN_ADDRESS, payload, + sizeof(payload)); + if (err < 0) + return err; + + return 0; +} + +/** + * mipi_dsi_dcs_set_page_address() - define the page extent of the frame + * memory accessed by the host processor + * @dsi: DSI peripheral device + * @start: first page of frame memory + * @end: last page of frame memory + * + * Return: 0 on success or a negative error code on failure. + */ +int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start, + u16 end) +{ + u8 payload[4] = { start >> 8, start & 0xff, end >> 8, end & 0xff }; + ssize_t err; + + err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_PAGE_ADDRESS, payload, + sizeof(payload)); + if (err < 0) + return err; + + return 0; +} + +/** * mipi_dsi_dcs_set_tear_off() - turn off the display module's Tearing Effect * output signal on the TE signal line * @dsi: DSI peripheral device diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 968085b1ef73..17ef2fbb09a5 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -184,6 +184,10 @@ 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); int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi); +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_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