From 70be83235ea2815f6c2a5fd45753de406be6c6aa Mon Sep 17 00:00:00 2001 From: Mythri P K Date: Thu, 10 Mar 2011 15:48:48 +0530 Subject: [PATCH] OMAP4: DSS2: HDMI: HDMI panel driver addition in the DSS The panel driver(hdmi_omap4_panel.c) in omap2/dss acts as a controller to manage the enable and disable requests and synchronize audio and video. Signed-off-by: Mythri P K Signed-off-by: Tomi Valkeinen --- drivers/video/omap2/dss/dss.h | 2 + drivers/video/omap2/dss/hdmi_omap4_panel.c | 222 +++++++++++++++++++++ 2 files changed, 224 insertions(+) create mode 100644 drivers/video/omap2/dss/hdmi_omap4_panel.c diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h index 91ed3fa8e60d..c2f582bb19c0 100644 --- a/drivers/video/omap2/dss/dss.h +++ b/drivers/video/omap2/dss/dss.h @@ -477,6 +477,8 @@ void omapdss_hdmi_display_disable(struct omap_dss_device *dssdev); void omapdss_hdmi_display_set_timing(struct omap_dss_device *dssdev); int omapdss_hdmi_display_check_timing(struct omap_dss_device *dssdev, struct omap_video_timings *timings); +int hdmi_panel_init(void); +void hdmi_panel_exit(void); /* RFBI */ #ifdef CONFIG_OMAP2_DSS_RFBI diff --git a/drivers/video/omap2/dss/hdmi_omap4_panel.c b/drivers/video/omap2/dss/hdmi_omap4_panel.c new file mode 100644 index 000000000000..ffb5de94131f --- /dev/null +++ b/drivers/video/omap2/dss/hdmi_omap4_panel.c @@ -0,0 +1,222 @@ +/* + * hdmi_omap4_panel.c + * + * HDMI library support functions for TI OMAP4 processors. + * + * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com/ + * Authors: Mythri P k + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see . + */ + +#include +#include +#include +#include +#include +#include + +#include "dss.h" + +static struct { + struct mutex hdmi_lock; +} hdmi; + + +static int hdmi_panel_probe(struct omap_dss_device *dssdev) +{ + DSSDBG("ENTER hdmi_panel_probe\n"); + + dssdev->panel.config = OMAP_DSS_LCD_TFT | + OMAP_DSS_LCD_IVS | OMAP_DSS_LCD_IHS; + + /* + * Initialize the timings to 640 * 480 + * This is only for framebuffer update not for TV timing setting + * Setting TV timing will be done only on enable + */ + dssdev->panel.timings.x_res = 640; + dssdev->panel.timings.y_res = 480; + + DSSDBG("hdmi_panel_probe x_res= %d y_res = %d\n", + dssdev->panel.timings.x_res, + dssdev->panel.timings.y_res); + return 0; +} + +static void hdmi_panel_remove(struct omap_dss_device *dssdev) +{ + +} + +static int hdmi_panel_enable(struct omap_dss_device *dssdev) +{ + int r = 0; + DSSDBG("ENTER hdmi_panel_enable\n"); + + mutex_lock(&hdmi.hdmi_lock); + + if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) { + r = -EINVAL; + goto err; + } + + r = omapdss_hdmi_display_enable(dssdev); + if (r) { + DSSERR("failed to power on\n"); + goto err; + } + + dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; + +err: + mutex_unlock(&hdmi.hdmi_lock); + + return r; +} + +static void hdmi_panel_disable(struct omap_dss_device *dssdev) +{ + mutex_lock(&hdmi.hdmi_lock); + + if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) + omapdss_hdmi_display_disable(dssdev); + + dssdev->state = OMAP_DSS_DISPLAY_DISABLED; + + mutex_unlock(&hdmi.hdmi_lock); +} + +static int hdmi_panel_suspend(struct omap_dss_device *dssdev) +{ + int r = 0; + + mutex_lock(&hdmi.hdmi_lock); + + if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) { + r = -EINVAL; + goto err; + } + + dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED; + + omapdss_hdmi_display_disable(dssdev); + +err: + mutex_unlock(&hdmi.hdmi_lock); + + return r; +} + +static int hdmi_panel_resume(struct omap_dss_device *dssdev) +{ + int r = 0; + + mutex_lock(&hdmi.hdmi_lock); + + if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED) { + r = -EINVAL; + goto err; + } + + r = omapdss_hdmi_display_enable(dssdev); + if (r) { + DSSERR("failed to power on\n"); + goto err; + } + + dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; + +err: + mutex_unlock(&hdmi.hdmi_lock); + + return r; +} + +static void hdmi_get_timings(struct omap_dss_device *dssdev, + struct omap_video_timings *timings) +{ + mutex_lock(&hdmi.hdmi_lock); + + *timings = dssdev->panel.timings; + + mutex_unlock(&hdmi.hdmi_lock); +} + +static void hdmi_set_timings(struct omap_dss_device *dssdev, + struct omap_video_timings *timings) +{ + DSSDBG("hdmi_set_timings\n"); + + mutex_lock(&hdmi.hdmi_lock); + + dssdev->panel.timings = *timings; + + if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) { + /* turn the hdmi off and on to get new timings to use */ + omapdss_hdmi_display_disable(dssdev); + omapdss_hdmi_display_set_timing(dssdev); + } + + mutex_unlock(&hdmi.hdmi_lock); +} + +static int hdmi_check_timings(struct omap_dss_device *dssdev, + struct omap_video_timings *timings) +{ + int r = 0; + + DSSDBG("hdmi_check_timings\n"); + + mutex_lock(&hdmi.hdmi_lock); + + r = omapdss_hdmi_display_check_timing(dssdev, timings); + if (r) { + DSSERR("Timing cannot be applied\n"); + goto err; + } +err: + mutex_unlock(&hdmi.hdmi_lock); + return r; +} + +static struct omap_dss_driver hdmi_driver = { + .probe = hdmi_panel_probe, + .remove = hdmi_panel_remove, + .enable = hdmi_panel_enable, + .disable = hdmi_panel_disable, + .suspend = hdmi_panel_suspend, + .resume = hdmi_panel_resume, + .get_timings = hdmi_get_timings, + .set_timings = hdmi_set_timings, + .check_timings = hdmi_check_timings, + .driver = { + .name = "hdmi_panel", + .owner = THIS_MODULE, + }, +}; + +int hdmi_panel_init(void) +{ + mutex_init(&hdmi.hdmi_lock); + + omap_dss_register_driver(&hdmi_driver); + + return 0; +} + +void hdmi_panel_exit(void) +{ + omap_dss_unregister_driver(&hdmi_driver); + +} -- 2.34.1