diff options
Diffstat (limited to 'drivers/video/omap2/dss/sdi.c')
| -rw-r--r-- | drivers/video/omap2/dss/sdi.c | 482 |
1 files changed, 0 insertions, 482 deletions
diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c deleted file mode 100644 index 856af2e8976..00000000000 --- a/drivers/video/omap2/dss/sdi.c +++ /dev/null @@ -1,482 +0,0 @@ -/* - * 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/delay.h> -#include <linux/err.h> -#include <linux/regulator/consumer.h> -#include <linux/export.h> -#include <linux/platform_device.h> -#include <linux/string.h> - -#include <video/omapdss.h> -#include "dss.h" - -static struct { - struct platform_device *pdev; - - bool update_enabled; - struct regulator *vdds_sdi_reg; - - struct dss_lcd_mgr_config mgr_config; - struct omap_video_timings timings; - int datapairs; - - struct omap_dss_device output; -} sdi; - -struct sdi_clk_calc_ctx { - unsigned long pck_min, pck_max; - - struct dss_clock_info dss_cinfo; - struct dispc_clock_info dispc_cinfo; -}; - -static bool dpi_calc_dispc_cb(int lckd, int pckd, unsigned long lck, - unsigned long pck, void *data) -{ - struct sdi_clk_calc_ctx *ctx = data; - - ctx->dispc_cinfo.lck_div = lckd; - ctx->dispc_cinfo.pck_div = pckd; - ctx->dispc_cinfo.lck = lck; - ctx->dispc_cinfo.pck = pck; - - return true; -} - -static bool dpi_calc_dss_cb(int fckd, unsigned long fck, void *data) -{ - struct sdi_clk_calc_ctx *ctx = data; - - ctx->dss_cinfo.fck = fck; - ctx->dss_cinfo.fck_div = fckd; - - return dispc_div_calc(fck, ctx->pck_min, ctx->pck_max, - dpi_calc_dispc_cb, ctx); -} - -static int sdi_calc_clock_div(unsigned long pclk, - struct dss_clock_info *dss_cinfo, - struct dispc_clock_info *dispc_cinfo) -{ - int i; - struct sdi_clk_calc_ctx ctx; - - /* - * DSS fclk gives us very few possibilities, so finding a good pixel - * clock may not be possible. We try multiple times to find the clock, - * each time widening the pixel clock range we look for, up to - * +/- 1MHz. - */ - - for (i = 0; i < 10; ++i) { - bool ok; - - memset(&ctx, 0, sizeof(ctx)); - if (pclk > 1000 * i * i * i) - ctx.pck_min = max(pclk - 1000 * i * i * i, 0lu); - else - ctx.pck_min = 0; - ctx.pck_max = pclk + 1000 * i * i * i; - - ok = dss_div_calc(ctx.pck_min, dpi_calc_dss_cb, &ctx); - if (ok) { - *dss_cinfo = ctx.dss_cinfo; - *dispc_cinfo = ctx.dispc_cinfo; - return 0; - } - } - - return -EINVAL; -} - -static void sdi_config_lcd_manager(struct omap_dss_device *dssdev) -{ - struct omap_overlay_manager *mgr = sdi.output.manager; - - sdi.mgr_config.io_pad_mode = DSS_IO_PAD_MODE_BYPASS; - - sdi.mgr_config.stallmode = false; - sdi.mgr_config.fifohandcheck = false; - - sdi.mgr_config.video_port_width = 24; - sdi.mgr_config.lcden_sig_polarity = 1; - - dss_mgr_set_lcd_config(mgr, &sdi.mgr_config); -} - -int omapdss_sdi_display_enable(struct omap_dss_device *dssdev) -{ - struct omap_dss_device *out = &sdi.output; - struct omap_video_timings *t = &sdi.timings; - struct dss_clock_info dss_cinfo; - struct dispc_clock_info dispc_cinfo; - unsigned long pck; - int r; - - if (out == NULL || out->manager == NULL) { - DSSERR("failed to enable display: no output/manager\n"); - return -ENODEV; - } - - r = regulator_enable(sdi.vdds_sdi_reg); - if (r) - goto err_reg_enable; - - r = dispc_runtime_get(); - if (r) - goto err_get_dispc; - - /* 15.5.9.1.2 */ - t->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE; - t->sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE; - - r = sdi_calc_clock_div(t->pixel_clock * 1000, &dss_cinfo, &dispc_cinfo); - if (r) - goto err_calc_clock_div; - - sdi.mgr_config.clock_info = dispc_cinfo; - - pck = dss_cinfo.fck / dispc_cinfo.lck_div / dispc_cinfo.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; - } - - - dss_mgr_set_timings(out->manager, t); - - r = dss_set_clock_div(&dss_cinfo); - if (r) - goto err_set_dss_clock_div; - - sdi_config_lcd_manager(dssdev); - - /* - * LCLK and PCLK divisors are located in shadow registers, and we - * normally write them to DISPC registers when enabling the output. - * However, SDI uses pck-free as source clock for its PLL, and pck-free - * is affected by the divisors. And as we need the PLL before enabling - * the output, we need to write the divisors early. - * - * It seems just writing to the DISPC register is enough, and we don't - * need to care about the shadow register mechanism for pck-free. The - * exact reason for this is unknown. - */ - dispc_mgr_set_clock_div(out->manager->id, &sdi.mgr_config.clock_info); - - dss_sdi_init(sdi.datapairs); - r = dss_sdi_enable(); - if (r) - goto err_sdi_enable; - mdelay(2); - - r = dss_mgr_enable(out->manager); - if (r) - goto err_mgr_enable; - - return 0; - -err_mgr_enable: - dss_sdi_disable(); -err_sdi_enable: -err_set_dss_clock_div: -err_calc_clock_div: - dispc_runtime_put(); -err_get_dispc: - regulator_disable(sdi.vdds_sdi_reg); -err_reg_enable: - return r; -} -EXPORT_SYMBOL(omapdss_sdi_display_enable); - -void omapdss_sdi_display_disable(struct omap_dss_device *dssdev) -{ - struct omap_overlay_manager *mgr = sdi.output.manager; - - dss_mgr_disable(mgr); - - dss_sdi_disable(); - - dispc_runtime_put(); - - regulator_disable(sdi.vdds_sdi_reg); -} -EXPORT_SYMBOL(omapdss_sdi_display_disable); - -void omapdss_sdi_set_timings(struct omap_dss_device *dssdev, - struct omap_video_timings *timings) -{ - sdi.timings = *timings; -} -EXPORT_SYMBOL(omapdss_sdi_set_timings); - -static void sdi_get_timings(struct omap_dss_device *dssdev, - struct omap_video_timings *timings) -{ - *timings = sdi.timings; -} - -static int sdi_check_timings(struct omap_dss_device *dssdev, - struct omap_video_timings *timings) -{ - struct omap_overlay_manager *mgr = sdi.output.manager; - - if (mgr && !dispc_mgr_timings_ok(mgr->id, timings)) - return -EINVAL; - - if (timings->pixel_clock == 0) - return -EINVAL; - - return 0; -} - -void omapdss_sdi_set_datapairs(struct omap_dss_device *dssdev, int datapairs) -{ - sdi.datapairs = datapairs; -} -EXPORT_SYMBOL(omapdss_sdi_set_datapairs); - -static int sdi_init_regulator(void) -{ - struct regulator *vdds_sdi; - - if (sdi.vdds_sdi_reg) - return 0; - - vdds_sdi = dss_get_vdds_sdi(); - - if (IS_ERR(vdds_sdi)) { - vdds_sdi = devm_regulator_get(&sdi.pdev->dev, "vdds_sdi"); - if (IS_ERR(vdds_sdi)) { - DSSERR("can't get VDDS_SDI regulator\n"); - return PTR_ERR(vdds_sdi); - } - } - - sdi.vdds_sdi_reg = vdds_sdi; - - return 0; -} - -static struct omap_dss_device *sdi_find_dssdev(struct platform_device *pdev) -{ - struct omap_dss_board_info *pdata = pdev->dev.platform_data; - const char *def_disp_name = omapdss_get_default_display_name(); - struct omap_dss_device *def_dssdev; - int i; - - def_dssdev = NULL; - - for (i = 0; i < pdata->num_devices; ++i) { - struct omap_dss_device *dssdev = pdata->devices[i]; - - if (dssdev->type != OMAP_DISPLAY_TYPE_SDI) - continue; - - if (def_dssdev == NULL) - def_dssdev = dssdev; - - if (def_disp_name != NULL && - strcmp(dssdev->name, def_disp_name) == 0) { - def_dssdev = dssdev; - break; - } - } - - return def_dssdev; -} - -static int sdi_probe_pdata(struct platform_device *sdidev) -{ - struct omap_dss_device *plat_dssdev; - struct omap_dss_device *dssdev; - int r; - - plat_dssdev = sdi_find_dssdev(sdidev); - - if (!plat_dssdev) - return 0; - - dssdev = dss_alloc_and_init_device(&sdidev->dev); - if (!dssdev) - return -ENOMEM; - - dss_copy_device_pdata(dssdev, plat_dssdev); - - r = sdi_init_regulator(); - if (r) { - DSSERR("device %s init failed: %d\n", dssdev->name, r); - dss_put_device(dssdev); - return r; - } - - r = omapdss_output_set_device(&sdi.output, dssdev); - if (r) { - DSSERR("failed to connect output to new device: %s\n", - dssdev->name); - dss_put_device(dssdev); - return r; - } - - r = dss_add_device(dssdev); - if (r) { - DSSERR("device %s register failed: %d\n", dssdev->name, r); - omapdss_output_unset_device(&sdi.output); - dss_put_device(dssdev); - return r; - } - - return 0; -} - -static int sdi_connect(struct omap_dss_device *dssdev, - struct omap_dss_device *dst) -{ - struct omap_overlay_manager *mgr; - int r; - - r = sdi_init_regulator(); - if (r) - return r; - - mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel); - if (!mgr) - return -ENODEV; - - r = dss_mgr_connect(mgr, dssdev); - if (r) - return r; - - r = omapdss_output_set_device(dssdev, dst); - if (r) { - DSSERR("failed to connect output to new device: %s\n", - dst->name); - dss_mgr_disconnect(mgr, dssdev); - return r; - } - - return 0; -} - -static void sdi_disconnect(struct omap_dss_device *dssdev, - struct omap_dss_device *dst) -{ - WARN_ON(dst != dssdev->device); - - if (dst != dssdev->device) - return; - - omapdss_output_unset_device(dssdev); - - if (dssdev->manager) - dss_mgr_disconnect(dssdev->manager, dssdev); -} - -static const struct omapdss_sdi_ops sdi_ops = { - .connect = sdi_connect, - .disconnect = sdi_disconnect, - - .enable = omapdss_sdi_display_enable, - .disable = omapdss_sdi_display_disable, - - .check_timings = sdi_check_timings, - .set_timings = omapdss_sdi_set_timings, - .get_timings = sdi_get_timings, - - .set_datapairs = omapdss_sdi_set_datapairs, -}; - -static void sdi_init_output(struct platform_device *pdev) -{ - struct omap_dss_device *out = &sdi.output; - - out->dev = &pdev->dev; - out->id = OMAP_DSS_OUTPUT_SDI; - out->output_type = OMAP_DISPLAY_TYPE_SDI; - out->name = "sdi.0"; - out->dispc_channel = OMAP_DSS_CHANNEL_LCD; - out->ops.sdi = &sdi_ops; - out->owner = THIS_MODULE; - - omapdss_register_output(out); -} - -static void __exit sdi_uninit_output(struct platform_device *pdev) -{ - struct omap_dss_device *out = &sdi.output; - - omapdss_unregister_output(out); -} - -static int omap_sdi_probe(struct platform_device *pdev) -{ - int r; - - sdi.pdev = pdev; - - sdi_init_output(pdev); - - if (pdev->dev.platform_data) { - r = sdi_probe_pdata(pdev); - if (r) - goto err_probe; - } - - return 0; - -err_probe: - sdi_uninit_output(pdev); - return r; -} - -static int __exit omap_sdi_remove(struct platform_device *pdev) -{ - dss_unregister_child_devices(&pdev->dev); - - sdi_uninit_output(pdev); - - return 0; -} - -static struct platform_driver omap_sdi_driver = { - .probe = omap_sdi_probe, - .remove = __exit_p(omap_sdi_remove), - .driver = { - .name = "omapdss_sdi", - .owner = THIS_MODULE, - }, -}; - -int __init sdi_init_platform_driver(void) -{ - return platform_driver_register(&omap_sdi_driver); -} - -void __exit sdi_uninit_platform_driver(void) -{ - platform_driver_unregister(&omap_sdi_driver); -} |