Staging: add MSM framebuffer driver

Qualcomm development of the MSM SOC framebuffer driver has
diverged significantly from the driver used by Android. This
is a snapshot of our current driver, in all it's agony. We are
putting this in staging to help with the process of converging
the two drivers.

At this point, the driver has been tested only in dumb
framebuffer mode.

Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
[dwalker@codeaurora.org: added a small compile fix and TODO.]
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 79 insertions, 0 deletions

diff --git a/drivers/staging/msm/msm_fb_bl.c b/drivers/staging/msm/msm_fb_bl.c
new file mode 100644
index 00000000000..033fc9486e0
--- /dev/null
+++ b/drivers/staging/msm/msm_fb_bl.c
@@ -0,0 +1,79 @@
+/* Copyright (c) 2008-2009, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/fb.h>
+#include <linux/string.h>
+#include <linux/version.h>
+#include <linux/backlight.h>
+
+#include "msm_fb.h"
+
+static int msm_fb_bl_get_brightness(struct backlight_device *pbd)
+{
+	return pbd->props.brightness;
+}
+
+static int msm_fb_bl_update_status(struct backlight_device *pbd)
+{
+	struct msm_fb_data_type *mfd = bl_get_data(pbd);
+	__u32 bl_lvl;
+
+	bl_lvl = pbd->props.brightness;
+	bl_lvl = mfd->fbi->bl_curve[bl_lvl];
+	msm_fb_set_backlight(mfd, bl_lvl, 1);
+	return 0;
+}
+
+static struct backlight_ops msm_fb_bl_ops = {
+	.get_brightness = msm_fb_bl_get_brightness,
+	.update_status = msm_fb_bl_update_status,
+};
+
+void msm_fb_config_backlight(struct msm_fb_data_type *mfd)
+{
+	struct msm_fb_panel_data *pdata;
+	struct backlight_device *pbd;
+	struct fb_info *fbi;
+	char name[16];
+
+	fbi = mfd->fbi;
+	pdata = (struct msm_fb_panel_data *)mfd->pdev->dev.platform_data;
+
+	if ((pdata) && (pdata->set_backlight)) {
+		snprintf(name, sizeof(name), "msmfb_bl%d", mfd->index);
+		pbd =
+		    backlight_device_register(name, fbi->dev, mfd,
+					      &msm_fb_bl_ops);
+		if (!IS_ERR(pbd)) {
+			fbi->bl_dev = pbd;
+			fb_bl_default_curve(fbi,
+					    0,
+					    mfd->panel_info.bl_min,
+					    mfd->panel_info.bl_max);
+			pbd->props.max_brightness = FB_BACKLIGHT_LEVELS - 1;
+			pbd->props.brightness = FB_BACKLIGHT_LEVELS - 1;
+			backlight_update_status(pbd);
+		} else {
+			fbi->bl_dev = NULL;
+			printk(KERN_ERR "msm_fb: backlight_device_register failed!\n");
+		}
+	}
+}