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authorTomi Valkeinen <tomi.valkeinen@ti.com>2015-12-09 18:28:28 +0200
committerTomi Valkeinen <tomi.valkeinen@ti.com>2015-12-29 11:07:46 +0200
commitf76ee892a99e68b55402b8d4b8aeffcae2aff34d (patch)
tree3760b7eb7a6db6bad5be5449e680ec5613c67848 /drivers/video/fbdev/omap2/omapfb/dss/core.c
parent1c6aac92ee6cbb007ec0765956095357e7d4090c (diff)
downloadlinux-stericsson-f76ee892a99e68b55402b8d4b8aeffcae2aff34d.tar.gz
omapfb: copy omapdss & displays for omapfb
This patch makes a copy of the omapdss driver and the omap panel & encoder drivers for omapfb. The purpose is to separate omapdrm and omapfb drivers from each other. Note that this patch only does a direct copy of the files without any other modifications. The files are not yet used. The original files are in: drivers/video/fbdev/omap2/dss/ drivers/video/fbdev/omap2/displays-new/ Here's a more detailed explanation about this and the following patches, from the introduction mail of the patch series: A short background on the current status. We have the following entities: * omapdss, located in drivers/video/fbdev/omap2/dss/. This is a driver for the display subsystem IPs used on OMAP (and related) SoCs. It offers only a kernel internal API, and does not implement anything for fbdev or drm. * omapdss panels and encoders, located in drivers/video/fbdev/omap2/displays-new/. These are panel and external encoder drivers, which use APIs offered by omapdss driver. These also don't implement anything for fbdev or drm. * omapdrm, located in drivers/gpu/drm/omapdrm/. This is a drm driver, which uses omapdss and the panel/encoder drivers to operate the hardware. * omapfb, located in drivers/video/fbdev/omap2/omapfb/. This is an fbdev driver, which uses omapdss and the panel/encoder drivers to operate the hardware. * omap_vout, located in drivers/media/platform/omap/. This is a v4l2 driver, which uses omapdss and omapfb to implement a v4l2 API for the video overlays. So, on the top level, we have either omapdrm, or omapfb+omap_vout. Both of those use the same low level drivers. Without going to the historical details why the architecture is like that, I think it's finally time to change that. The situation with omapfb+omap_vout is that it still works, but no new features have been added for a long time, and I want to keep it working as it's still being used. At some point in the future I'd like to remove omapfb and omap_vout altogether. Omapdrm, on the other hand, is being actively developed. Sharing the low level parts with omapfb makes that development more difficult than it should be. It also "hides" half of the development, as everything happening in the low level parts resides under fbdev directory, not in the drm directory. I've been wanting to clean this up for a long time, but I haven't figured out a very good way to do it. I still haven't, but here's the best way I have come up with. This series makes a full copy of the low level parts, omapdss and panel/encoder drivers. Both omapfb+omap_vout and omapdrm will have their own versions. The copy omapfb+omap_vout get is a new copy, and the copy that omapdrm gets is just the current files moved. This way git will associate the omapdrm version with the old files. The omapfb+omap_vout versions won't be touched unless there are some big issues there. The omapdrm versions can be refactored and cleaned up, as the omapfb support code is no longer needed. We can perhaps also merge omapdss and omapdrm into the same kernel module. This series only does the copy, and the absolutely necessary parts. No further cleanups are done yet. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Acked-by: Dave Airlie <airlied@gmail.com> Acked-by: Rob Clark <robdclark@gmail.com>
Diffstat (limited to 'drivers/video/fbdev/omap2/omapfb/dss/core.c')
-rw-r--r--drivers/video/fbdev/omap2/omapfb/dss/core.c343
1 files changed, 343 insertions, 0 deletions
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/core.c b/drivers/video/fbdev/omap2/omapfb/dss/core.c
new file mode 100644
index 000000000000..54eeb507f9b3
--- /dev/null
+++ b/drivers/video/fbdev/omap2/omapfb/dss/core.c
@@ -0,0 +1,343 @@
+/*
+ * linux/drivers/video/omap2/dss/core.c
+ *
+ * Copyright (C) 2009 Nokia Corporation
+ * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
+ *
+ * Some code and ideas taken from drivers/video/omap/ driver
+ * by Imre Deak.
+ *
+ * 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 "CORE"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/seq_file.h>
+#include <linux/debugfs.h>
+#include <linux/io.h>
+#include <linux/device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/suspend.h>
+#include <linux/slab.h>
+
+#include <video/omapdss.h>
+
+#include "dss.h"
+#include "dss_features.h"
+
+static struct {
+ struct platform_device *pdev;
+
+ const char *default_display_name;
+} core;
+
+static char *def_disp_name;
+module_param_named(def_disp, def_disp_name, charp, 0);
+MODULE_PARM_DESC(def_disp, "default display name");
+
+const char *omapdss_get_default_display_name(void)
+{
+ return core.default_display_name;
+}
+EXPORT_SYMBOL(omapdss_get_default_display_name);
+
+enum omapdss_version omapdss_get_version(void)
+{
+ struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
+ return pdata->version;
+}
+EXPORT_SYMBOL(omapdss_get_version);
+
+struct platform_device *dss_get_core_pdev(void)
+{
+ return core.pdev;
+}
+
+int dss_dsi_enable_pads(int dsi_id, unsigned lane_mask)
+{
+ struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
+
+ if (!board_data->dsi_enable_pads)
+ return -ENOENT;
+
+ return board_data->dsi_enable_pads(dsi_id, lane_mask);
+}
+
+void dss_dsi_disable_pads(int dsi_id, unsigned lane_mask)
+{
+ struct omap_dss_board_info *board_data = core.pdev->dev.platform_data;
+
+ if (!board_data->dsi_disable_pads)
+ return;
+
+ return board_data->dsi_disable_pads(dsi_id, lane_mask);
+}
+
+int dss_set_min_bus_tput(struct device *dev, unsigned long tput)
+{
+ struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
+
+ if (pdata->set_min_bus_tput)
+ return pdata->set_min_bus_tput(dev, tput);
+ else
+ return 0;
+}
+
+#if defined(CONFIG_OMAP2_DSS_DEBUGFS)
+static int dss_debug_show(struct seq_file *s, void *unused)
+{
+ void (*func)(struct seq_file *) = s->private;
+ func(s);
+ return 0;
+}
+
+static int dss_debug_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, dss_debug_show, inode->i_private);
+}
+
+static const struct file_operations dss_debug_fops = {
+ .open = dss_debug_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static struct dentry *dss_debugfs_dir;
+
+static int dss_initialize_debugfs(void)
+{
+ dss_debugfs_dir = debugfs_create_dir("omapdss", NULL);
+ if (IS_ERR(dss_debugfs_dir)) {
+ int err = PTR_ERR(dss_debugfs_dir);
+ dss_debugfs_dir = NULL;
+ return err;
+ }
+
+ debugfs_create_file("clk", S_IRUGO, dss_debugfs_dir,
+ &dss_debug_dump_clocks, &dss_debug_fops);
+
+ return 0;
+}
+
+static void dss_uninitialize_debugfs(void)
+{
+ if (dss_debugfs_dir)
+ debugfs_remove_recursive(dss_debugfs_dir);
+}
+
+int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
+{
+ struct dentry *d;
+
+ d = debugfs_create_file(name, S_IRUGO, dss_debugfs_dir,
+ write, &dss_debug_fops);
+
+ return PTR_ERR_OR_ZERO(d);
+}
+#else /* CONFIG_OMAP2_DSS_DEBUGFS */
+static inline int dss_initialize_debugfs(void)
+{
+ return 0;
+}
+static inline void dss_uninitialize_debugfs(void)
+{
+}
+int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
+{
+ return 0;
+}
+#endif /* CONFIG_OMAP2_DSS_DEBUGFS */
+
+/* PLATFORM DEVICE */
+static int omap_dss_pm_notif(struct notifier_block *b, unsigned long v, void *d)
+{
+ DSSDBG("pm notif %lu\n", v);
+
+ switch (v) {
+ case PM_SUSPEND_PREPARE:
+ case PM_HIBERNATION_PREPARE:
+ case PM_RESTORE_PREPARE:
+ DSSDBG("suspending displays\n");
+ return dss_suspend_all_devices();
+
+ case PM_POST_SUSPEND:
+ case PM_POST_HIBERNATION:
+ case PM_POST_RESTORE:
+ DSSDBG("resuming displays\n");
+ return dss_resume_all_devices();
+
+ default:
+ return 0;
+ }
+}
+
+static struct notifier_block omap_dss_pm_notif_block = {
+ .notifier_call = omap_dss_pm_notif,
+};
+
+static int __init omap_dss_probe(struct platform_device *pdev)
+{
+ struct omap_dss_board_info *pdata = pdev->dev.platform_data;
+ int r;
+
+ core.pdev = pdev;
+
+ dss_features_init(omapdss_get_version());
+
+ r = dss_initialize_debugfs();
+ if (r)
+ goto err_debugfs;
+
+ if (def_disp_name)
+ core.default_display_name = def_disp_name;
+ else if (pdata->default_display_name)
+ core.default_display_name = pdata->default_display_name;
+ else if (pdata->default_device)
+ core.default_display_name = pdata->default_device->name;
+
+ register_pm_notifier(&omap_dss_pm_notif_block);
+
+ return 0;
+
+err_debugfs:
+
+ return r;
+}
+
+static int omap_dss_remove(struct platform_device *pdev)
+{
+ unregister_pm_notifier(&omap_dss_pm_notif_block);
+
+ dss_uninitialize_debugfs();
+
+ return 0;
+}
+
+static void omap_dss_shutdown(struct platform_device *pdev)
+{
+ DSSDBG("shutdown\n");
+ dss_disable_all_devices();
+}
+
+static struct platform_driver omap_dss_driver = {
+ .remove = omap_dss_remove,
+ .shutdown = omap_dss_shutdown,
+ .driver = {
+ .name = "omapdss",
+ },
+};
+
+/* INIT */
+static int (*dss_output_drv_reg_funcs[])(void) __initdata = {
+ dss_init_platform_driver,
+ dispc_init_platform_driver,
+#ifdef CONFIG_OMAP2_DSS_DSI
+ dsi_init_platform_driver,
+#endif
+#ifdef CONFIG_OMAP2_DSS_DPI
+ dpi_init_platform_driver,
+#endif
+#ifdef CONFIG_OMAP2_DSS_SDI
+ sdi_init_platform_driver,
+#endif
+#ifdef CONFIG_OMAP2_DSS_RFBI
+ rfbi_init_platform_driver,
+#endif
+#ifdef CONFIG_OMAP2_DSS_VENC
+ venc_init_platform_driver,
+#endif
+#ifdef CONFIG_OMAP4_DSS_HDMI
+ hdmi4_init_platform_driver,
+#endif
+#ifdef CONFIG_OMAP5_DSS_HDMI
+ hdmi5_init_platform_driver,
+#endif
+};
+
+static void (*dss_output_drv_unreg_funcs[])(void) = {
+#ifdef CONFIG_OMAP5_DSS_HDMI
+ hdmi5_uninit_platform_driver,
+#endif
+#ifdef CONFIG_OMAP4_DSS_HDMI
+ hdmi4_uninit_platform_driver,
+#endif
+#ifdef CONFIG_OMAP2_DSS_VENC
+ venc_uninit_platform_driver,
+#endif
+#ifdef CONFIG_OMAP2_DSS_RFBI
+ rfbi_uninit_platform_driver,
+#endif
+#ifdef CONFIG_OMAP2_DSS_SDI
+ sdi_uninit_platform_driver,
+#endif
+#ifdef CONFIG_OMAP2_DSS_DPI
+ dpi_uninit_platform_driver,
+#endif
+#ifdef CONFIG_OMAP2_DSS_DSI
+ dsi_uninit_platform_driver,
+#endif
+ dispc_uninit_platform_driver,
+ dss_uninit_platform_driver,
+};
+
+static int __init omap_dss_init(void)
+{
+ int r;
+ int i;
+
+ r = platform_driver_probe(&omap_dss_driver, omap_dss_probe);
+ if (r)
+ return r;
+
+ for (i = 0; i < ARRAY_SIZE(dss_output_drv_reg_funcs); ++i) {
+ r = dss_output_drv_reg_funcs[i]();
+ if (r)
+ goto err_reg;
+ }
+
+ return 0;
+
+err_reg:
+ for (i = ARRAY_SIZE(dss_output_drv_reg_funcs) - i;
+ i < ARRAY_SIZE(dss_output_drv_reg_funcs);
+ ++i)
+ dss_output_drv_unreg_funcs[i]();
+
+ platform_driver_unregister(&omap_dss_driver);
+
+ return r;
+}
+
+static void __exit omap_dss_exit(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(dss_output_drv_unreg_funcs); ++i)
+ dss_output_drv_unreg_funcs[i]();
+
+ platform_driver_unregister(&omap_dss_driver);
+}
+
+module_init(omap_dss_init);
+module_exit(omap_dss_exit);
+
+MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
+MODULE_DESCRIPTION("OMAP2/3 Display Subsystem");
+MODULE_LICENSE("GPL v2");
+