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path: root/drivers/video/omap2/dss/sdi.c
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Diffstat (limited to 'drivers/video/omap2/dss/sdi.c')
-rw-r--r--drivers/video/omap2/dss/sdi.c389
1 files changed, 0 insertions, 389 deletions
diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
deleted file mode 100644
index ccc569ae7cc..00000000000
--- a/drivers/video/omap2/dss/sdi.c
+++ /dev/null
@@ -1,389 +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);
-}
-
-static int 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;
-}
-
-static void 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);
-}
-
-static void sdi_set_timings(struct omap_dss_device *dssdev,
- struct omap_video_timings *timings)
-{
- sdi.timings = *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;
-}
-
-static void sdi_set_datapairs(struct omap_dss_device *dssdev, int datapairs)
-{
- sdi.datapairs = datapairs;
-}
-
-static int sdi_init_regulator(void)
-{
- struct regulator *vdds_sdi;
-
- if (sdi.vdds_sdi_reg)
- return 0;
-
- 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 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->dst);
-
- if (dst != dssdev->dst)
- 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 = sdi_display_enable,
- .disable = sdi_display_disable,
-
- .check_timings = sdi_check_timings,
- .set_timings = sdi_set_timings,
- .get_timings = sdi_get_timings,
-
- .set_datapairs = 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)
-{
- sdi.pdev = pdev;
-
- sdi_init_output(pdev);
-
- return 0;
-}
-
-static int __exit omap_sdi_remove(struct platform_device *pdev)
-{
- 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);
-}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 13:11:18 +0000