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Date: Mon, 6 Oct 2008 11:58:58 -0500
From: "Castaneda Gonzalez, Axel" <x0055901@...com>
To: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH 01/02] [omapzoom]ARM-OMAP3-TV_detection_support
From: Axel Castaneda Gonzalez<x0055901@...com>
ARM: OMAP3: TV detection support
This patch provides TV detection support on omapzoom
display driver.
User will be able to check if TV is connected to
SDP34030 or LDP S-Video port through the use of /sys/class/display_control/omap_disp_control/tv_state
sysfs entry.
Signed-off-by: Axel Castaneda Gonzalez<x0055901@...com>
---
arch/arm/plat-omap/display.c | 22 +++++++++++
arch/arm/plat-omap/include/mach/display.h | 3 +
drivers/video/omap/omap_disp_out.c | 56 ++++++++++++++++++++++++++++++
3 files changed, 80 insertions(+), 1 deletion(-)
Index: git-ti-omap34tree/arch/arm/plat-omap/display.c
===================================================================
--- git-ti-omap34tree.orig/arch/arm/plat-omap/display.c
+++ git-ti-omap34tree/arch/arm/plat-omap/display.c
@@ -3847,6 +3847,26 @@ int omap2_disp_lpr_disable(void)
}
#endif /* CONFIG_ARCH_OMAP34XX */
+/**
+ * omap2_enable_tv_detect - Enables TVDET pulse generation
+ */
+void omap2_enable_tv_detect(void){
+ /* TVDET Active High Setting */
+ venc_reg_merge(VENC_GEN_CTRL, 0x1 << 16, 0x1 << 16);
+ /* Enable TVDET pulse generation */
+ venc_reg_merge(VENC_GEN_CTRL, 0x1, 0x1);
+}
+EXPORT_SYMBOL(omap2_enable_tv_detect);
+
+/**
+ * omap2_disable_tv_detect - Disables TVDET pulse generation
+ */
+void omap2_disable_tv_detect(void){
+ /* Disable TVDET pulse generation */
+ venc_reg_merge(VENC_GEN_CTRL, 0x0, 0x1);
+}
+EXPORT_SYMBOL(omap2_disable_tv_detect);
+
/* Start before devices */
subsys_initcall(omap2_disp_init);
Index: git-ti-omap34tree/arch/arm/plat-omap/include/mach/display.h
===================================================================
--- git-ti-omap34tree.orig/arch/arm/plat-omap/include/mach/display.h
+++ git-ti-omap34tree/arch/arm/plat-omap/include/mach/display.h
@@ -849,6 +849,9 @@ void omap2_disp_set_gfx_fifo_high_thresh
extern void omap2_disp_put_all_clks(void);
extern void omap2_disp_get_all_clks(void);
+/* TV detection*/
+void omap2_enable_tv_detect(void);
+void omap2_disable_tv_detect(void);
/*------------------ end of exposed values and APIs -------------------------*/
#endif /* __ASM_ARCH_OMAP2_DISP_H */
Index: git-ti-omap34tree/drivers/video/omap/omap_disp_out.c
===================================================================
--- git-ti-omap34tree.orig/drivers/video/omap/omap_disp_out.c
+++ git-ti-omap34tree/drivers/video/omap/omap_disp_out.c
@@ -139,6 +139,9 @@
#endif
#endif
+#define TV_INT_GPIO 33
+#define TV_DETECT_DELAY 40 /*Delay for TV detection logic*/
+
#define CONFIG_OMAP2_LCD
#define ENABLE_VDAC_DEDICATED 0x03
#define ENABLE_VDAC_DEV_GRP 0x20
@@ -1147,6 +1150,9 @@ tv_init(void)
printk(KERN_DEBUG DRIVER
"TV %dx%d interlaced\n", H4_TV_XRES, H4_TV_YRES);
+ omap_request_gpio(TV_INT_GPIO);
+ omap_set_gpio_direction(TV_INT_GPIO, 1);
+
#if 0 /* To be added back once SRF is in place */
resource_request(tv_rhandle,T2_VDAC_1V80);
resource_release(tv_rhandle);
@@ -1164,6 +1170,7 @@ tv_exit(void)
omap2_disp_disable_output_dev(OMAP2_OUTPUT_TV);
power_tv(TV_OFF);
omap2_disp_put_all_clks();
+ omap_free_gpio(TV_INT_GPIO);
tv_in_use = 0;
return 0;
}
@@ -1822,6 +1829,54 @@ tv_standard_store(struct device *dev, st
return count;
}
+
+static void enable_tv_detect(void){
+ omap2_disp_get_all_clks();
+ if (!tv_in_use) {
+ omap2_disp_set_tvref(TVREF_ON);
+#ifdef CONFIG_OMAP3_PM
+ resource_request(tv_rhandle, T2_VDAC_1V80);
+#else
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
+ ENABLE_VDAC_DEDICATED, TWL4030_VDAC_DEDICATED);
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
+ ENABLE_VDAC_DEV_GRP, TWL4030_VDAC_DEV_GRP);
+#endif
+ }
+ omap2_enable_tv_detect();
+}
+
+static void disable_tv_detect(void){
+ omap2_disable_tv_detect();
+ if (!tv_in_use) {
+ omap2_disp_set_tvref(TVREF_OFF);
+#ifdef CONFIG_OMAP3_PM
+ resource_release(tv_rhandle);
+#else
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x00,
+ TWL4030_VDAC_DEDICATED);
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x00,
+ TWL4030_VDAC_DEV_GRP);
+#endif
+ }
+ omap2_disp_put_all_clks();
+}
+
+static ssize_t
+tv_state_show(struct device *dev, struct device_attribute *attr, char *buf) {
+ int tv_state;
+ enable_tv_detect();
+ msleep(TV_DETECT_DELAY);
+ tv_state = omap_get_gpio_datain(TV_INT_GPIO);
+ disable_tv_detect();
+ return sprintf(buf, "%d\n", tv_state);
+}
+
+static ssize_t
+tv_state_store(struct device *dev, struct device_attribute *attr,
+ const char *buffer, size_t count) {
+ return 0;
+}
#endif
#define DECLARE_ATTR(_name,_mode,_show,_store) \
@@ -1855,6 +1910,7 @@ static struct device_attribute bl_device
#endif
#ifdef CONFIG_OMAP2_TV
DECLARE_ATTR(tv_standard, 0644, tv_standard_show, tv_standard_store),
+ DECLARE_ATTR(tv_state, S_IRWXUGO, tv_state_show, tv_state_store),
#endif
};
--
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