video: mcde: Add Fictive display

The possibility to use a fictive display that is
not using HW, is added.

Depends-On: I1ba92f35528518c9a9e2c805973dac8033a17f39

ST-Ericsson ID: 344358
ST-Ericsson Linux next: Not tested, ER 282779
ST-Ericsson FOSS-OUT ID: Trivial

Change-Id: I8ddc6069e037d879582c810f9298273b3d75cc15
Signed-off-by: Per Persson <per.xb.persson@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/24716
Reviewed-by: QATOOLS
Reviewed-by: QATEST
Reviewed-by: Marcel TUNNISSEN <marcel.tuennissen@stericsson.com>
Reviewed-by: Linus WALLEIJ <linus.walleij@stericsson.com>

3 files changed, 94 insertions, 16 deletions

diff --git a/drivers/video/mcde/Makefile b/drivers/video/mcde/Makefile
index 93097f8961e..7c9324ded3a 100644
--- a/drivers/video/mcde/Makefile
+++ b/drivers/video/mcde/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_MCDE_DISPLAY_SONY_SY35560_DSI)	+= display-sony_sy35560_dsi.o
 obj-$(CONFIG_MCDE_DISPLAY_VUIB500_DPI)		+= display-vuib500-dpi.o
 obj-$(CONFIG_MCDE_DISPLAY_AB8500_DENC)		+= display-ab8500.o
 obj-$(CONFIG_MCDE_DISPLAY_AV8100)		+= display-av8100.o
+obj-$(CONFIG_DISPLAY_FICTIVE)			+= display-fictive.o
 
 ifdef CONFIG_FB_MCDE_DEBUG
 EXTRA_CFLAGS += -DDEBUG
diff --git a/drivers/video/mcde/display-fictive.c b/drivers/video/mcde/display-fictive.c
new file mode 100644
index 00000000000..8389357a693
--- /dev/null
+++ b/drivers/video/mcde/display-fictive.c
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2011
+ *
+ * ST-Ericsson MCDE fictive display driver
+ *
+ * Author: Per Persson <per.xb.persson@stericsson.com>
+ * for ST-Ericsson.
+ *
+ * License terms: GNU General Public License (GPL), version 2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/err.h>
+
+#include <video/mcde_display.h>
+
+static int __devinit fictive_probe(struct mcde_display_device *dev)
+{
+	dev->prepare_for_update = NULL;
+	dev->platform_enable = NULL,
+	dev->platform_disable = NULL,
+	dev->set_power_mode = NULL;
+
+	dev_info(&dev->dev, "Fictive display probed\n");
+
+	return 0;
+}
+
+static int __devexit fictive_remove(struct mcde_display_device *dev)
+{
+	return 0;
+}
+
+static struct mcde_display_driver fictive_driver = {
+	.probe	= fictive_probe,
+	.remove = fictive_remove,
+	.driver = {
+		.name	= "mcde_disp_fictive",
+	},
+};
+
+/* Module init */
+static int __init mcde_display_fictive_init(void)
+{
+	pr_info("%s\n", __func__);
+
+	return mcde_display_driver_register(&fictive_driver);
+}
+module_init(mcde_display_fictive_init);
+
+static void __exit mcde_display_fictive_exit(void)
+{
+	pr_info("%s\n", __func__);
+
+	mcde_display_driver_unregister(&fictive_driver);
+}
+module_exit(mcde_display_fictive_exit);
+
+MODULE_AUTHOR("Per Persson <per.xb.persson@stericsson.com>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ST-Ericsson MCDE fictive display driver");
diff --git a/drivers/video/mcde/mcde_fb.c b/drivers/video/mcde/mcde_fb.c
index cd7dd70101d..3b464cd8024 100644
--- a/drivers/video/mcde/mcde_fb.c
+++ b/drivers/video/mcde/mcde_fb.c
@@ -490,6 +490,9 @@ static int apply_var(struct fb_info *fbi, struct mcde_display_device *ddev)
 	}
 	fbi->fix.line_length = line_len;
 
+	if (ddev->fictive)
+		goto apply_var_end;
+
 	if (ddev) {
 		/* Apply pixel format */
 		fmt = var_to_pix_fmt_info(var);
@@ -520,6 +523,7 @@ static int apply_var(struct fb_info *fbi, struct mcde_display_device *ddev)
 		mcde_dss_update_overlay(ovly, num_buffers == 3);
 	}
 
+apply_var_end:
 	return 0;
 }
 
@@ -638,13 +642,15 @@ struct fb_info *mcde_fb_create(struct mcde_display_device *ddev,
 	init_fb(fbi);
 	mfb = to_mcde_fb(fbi);
 
-	ret = mcde_dss_open_channel(ddev);
-	if (ret)
-		goto channel_open_failed;
+	if (ddev->fictive == false) {
+		ret = mcde_dss_open_channel(ddev);
+		if (ret)
+			goto channel_open_failed;
 
-	ret = mcde_dss_enable_display(ddev);
-	if (ret)
-		goto display_enable_failed;
+		ret = mcde_dss_enable_display(ddev);
+		if (ret)
+			goto display_enable_failed;
+	}
 
 	/* Prepare var and allocate frame buffer memory */
 	init_var_fmt(&fbi->var, w, h, vw, vh, pix_fmt, rotate);
@@ -653,7 +659,8 @@ struct fb_info *mcde_fb_create(struct mcde_display_device *ddev,
 	if (ret)
 		goto apply_var_failed;
 
-	mcde_dss_set_pixel_format(ddev, ddev->port->pixel_format);
+	if (ddev->fictive == false)
+		mcde_dss_set_pixel_format(ddev, ddev->port->pixel_format);
 
 	/* Setup overlay */
 	get_ovly_info(fbi, NULL, &ovly_info);
@@ -665,9 +672,11 @@ struct fb_info *mcde_fb_create(struct mcde_display_device *ddev,
 	mfb->ovlys[0] = ovly;
 	mfb->num_ovlys = 1;
 
-	ret = mcde_dss_enable_overlay(ovly);
-	if (ret)
-		goto ovly_enable_failed;
+	if (ddev->fictive == false) {
+		ret = mcde_dss_enable_overlay(ovly);
+		if (ret)
+			goto ovly_enable_failed;
+	}
 
 	mfb->id = ddev->id;
 
@@ -679,11 +688,13 @@ struct fb_info *mcde_fb_create(struct mcde_display_device *ddev,
 	ddev->fbi = fbi;
 
 #ifdef CONFIG_HAS_EARLYSUSPEND
-	mfb->early_suspend.level =
+	if (ddev->fictive == false) {
+		mfb->early_suspend.level =
 				EARLY_SUSPEND_LEVEL_DISABLE_FB;
-	mfb->early_suspend.suspend = early_suspend;
-	mfb->early_suspend.resume = late_resume;
-	register_early_suspend(&mfb->early_suspend);
+		mfb->early_suspend.suspend = early_suspend;
+		mfb->early_suspend.resume = late_resume;
+		register_early_suspend(&mfb->early_suspend);
+	}
 #endif
 
 	goto out;
@@ -719,8 +730,10 @@ void mcde_fb_destroy(struct mcde_display_device *dev)
 
 	dev_vdbg(&dev->dev, "%s\n", __func__);
 
-	mcde_dss_disable_display(dev);
-	mcde_dss_close_channel(dev);
+	if (dev->fictive == false) {
+		mcde_dss_disable_display(dev);
+		mcde_dss_close_channel(dev);
+	}
 
 	mfb = to_mcde_fb(dev->fbi);
 	for (i = 0; i < mfb->num_ovlys; i++) {