diff options
| -rw-r--r-- | drivers/video/omap2/dss/sdi.c | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c new file mode 100644 index 000000000000..c24f307d3da1 --- /dev/null +++ b/drivers/video/omap2/dss/sdi.c @@ -0,0 +1,277 @@ +/* + * linux/drivers/video/omap2/dss/sdi.c + * + * Copyright (C) 2009 Nokia Corporation + * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com> + * + * 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 <http://www.gnu.org/licenses/>. + */ + +#define DSS_SUBSYS_NAME "SDI" + +#include <linux/kernel.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/err.h> + +#include <plat/display.h> +#include "dss.h" + +static struct { + bool skip_init; + bool update_enabled; +} sdi; + +static void sdi_basic_init(void) +{ + dispc_set_parallel_interface_mode(OMAP_DSS_PARALLELMODE_BYPASS); + + dispc_set_lcd_display_type(OMAP_DSS_LCD_DISPLAY_TFT); + dispc_set_tft_data_lines(24); + dispc_lcd_enable_signal_polarity(1); +} + +static int sdi_display_enable(struct omap_dss_device *dssdev) +{ + struct omap_video_timings *t = &dssdev->panel.timings; + struct dss_clock_info dss_cinfo; + struct dispc_clock_info dispc_cinfo; + u16 lck_div, pck_div; + unsigned long fck; + unsigned long pck; + int r; + + r = omap_dss_start_device(dssdev); + if (r) { + DSSERR("failed to start device\n"); + goto err0; + } + + if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) { + DSSERR("dssdev already enabled\n"); + r = -EINVAL; + goto err1; + } + + /* In case of skip_init sdi_init has already enabled the clocks */ + if (!sdi.skip_init) + dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1); + + sdi_basic_init(); + + /* 15.5.9.1.2 */ + dssdev->panel.config |= OMAP_DSS_LCD_RF | OMAP_DSS_LCD_ONOFF; + + dispc_set_pol_freq(dssdev->panel.config, dssdev->panel.acbi, + dssdev->panel.acb); + + if (!sdi.skip_init) { + r = dss_calc_clock_div(1, t->pixel_clock * 1000, + &dss_cinfo, &dispc_cinfo); + } else { + r = dss_get_clock_div(&dss_cinfo); + r = dispc_get_clock_div(&dispc_cinfo); + } + + if (r) + goto err2; + + fck = dss_cinfo.fck; + lck_div = dispc_cinfo.lck_div; + pck_div = dispc_cinfo.pck_div; + + pck = fck / lck_div / pck_div / 1000; + + if (pck != t->pixel_clock) { + DSSWARN("Could not find exact pixel clock. Requested %d kHz, " + "got %lu kHz\n", + t->pixel_clock, pck); + + t->pixel_clock = pck; + } + + + dispc_set_lcd_timings(t); + + r = dss_set_clock_div(&dss_cinfo); + if (r) + goto err2; + + r = dispc_set_clock_div(&dispc_cinfo); + if (r) + goto err2; + + if (!sdi.skip_init) { + dss_sdi_init(dssdev->phy.sdi.datapairs); + r = dss_sdi_enable(); + if (r) + goto err1; + mdelay(2); + } + + dispc_enable_lcd_out(1); + + if (dssdev->driver->enable) { + r = dssdev->driver->enable(dssdev); + if (r) + goto err3; + } + + dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; + + sdi.skip_init = 0; + + return 0; +err3: + dispc_enable_lcd_out(0); +err2: + dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1); +err1: + omap_dss_stop_device(dssdev); +err0: + return r; +} + +static int sdi_display_resume(struct omap_dss_device *dssdev); + +static void sdi_display_disable(struct omap_dss_device *dssdev) +{ + if (dssdev->state == OMAP_DSS_DISPLAY_DISABLED) + return; + + if (dssdev->state == OMAP_DSS_DISPLAY_SUSPENDED) + if (sdi_display_resume(dssdev)) + return; + + if (dssdev->driver->disable) + dssdev->driver->disable(dssdev); + + dispc_enable_lcd_out(0); + + dss_sdi_disable(); + + dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1); + + dssdev->state = OMAP_DSS_DISPLAY_DISABLED; + + omap_dss_stop_device(dssdev); +} + +static int sdi_display_suspend(struct omap_dss_device *dssdev) +{ + if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) + return -EINVAL; + + if (dssdev->driver->suspend) + dssdev->driver->suspend(dssdev); + + dispc_enable_lcd_out(0); + + dss_sdi_disable(); + + dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1); + + dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED; + + return 0; +} + +static int sdi_display_resume(struct omap_dss_device *dssdev) +{ + int r; + + if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED) + return -EINVAL; + + dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1); + + r = dss_sdi_enable(); + if (r) + goto err; + mdelay(2); + + dispc_enable_lcd_out(1); + + if (dssdev->driver->resume) + dssdev->driver->resume(dssdev); + + dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; + + return 0; +err: + dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1); + return r; +} + +static int sdi_display_set_update_mode(struct omap_dss_device *dssdev, + enum omap_dss_update_mode mode) +{ + if (mode == OMAP_DSS_UPDATE_MANUAL) + return -EINVAL; + + if (mode == OMAP_DSS_UPDATE_DISABLED) { + dispc_enable_lcd_out(0); + sdi.update_enabled = 0; + } else { + dispc_enable_lcd_out(1); + sdi.update_enabled = 1; + } + + return 0; +} + +static enum omap_dss_update_mode sdi_display_get_update_mode( + struct omap_dss_device *dssdev) +{ + return sdi.update_enabled ? OMAP_DSS_UPDATE_AUTO : + OMAP_DSS_UPDATE_DISABLED; +} + +static void sdi_get_timings(struct omap_dss_device *dssdev, + struct omap_video_timings *timings) +{ + *timings = dssdev->panel.timings; +} + +int sdi_init_display(struct omap_dss_device *dssdev) +{ + DSSDBG("SDI init\n"); + + dssdev->enable = sdi_display_enable; + dssdev->disable = sdi_display_disable; + dssdev->suspend = sdi_display_suspend; + dssdev->resume = sdi_display_resume; + dssdev->set_update_mode = sdi_display_set_update_mode; + dssdev->get_update_mode = sdi_display_get_update_mode; + dssdev->get_timings = sdi_get_timings; + + return 0; +} + +int sdi_init(bool skip_init) +{ + /* we store this for first display enable, then clear it */ + sdi.skip_init = skip_init; + + /* + * Enable clocks already here, otherwise there would be a toggle + * of them until sdi_display_enable is called. + */ + if (skip_init) + dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1); + return 0; +} + +void sdi_exit(void) +{ +} |
