drivers/video: use strings to specify the Freescale DIU monitor port
Instead of using ill-defined numbers (0, 1, and 2) for the monitor port, allow
the user to specify the port by name ("dvi", "lvds", or "dlvds"). This works
on the kernel command line, the module command-line, and the sysfs "monitor"
device.
Note that changing the monitor port does not currently work on the P1022DS,
because the code that talks to the PIXIS FPGA is broken.
Signed-off-by: Timur Tabi <timur@freescale.com>
Acked-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/drivers/video/fsl-diu-fb.c b/drivers/video/fsl-diu-fb.c
index 0acc7d6..0f1933b 100644
--- a/drivers/video/fsl-diu-fb.c
+++ b/drivers/video/fsl-diu-fb.c
@@ -31,8 +31,6 @@
#include <linux/uaccess.h>
#include <linux/vmalloc.h>
-#include <linux/of_platform.h>
-
#include <sysdev/fsl_soc.h>
#include <linux/fsl-diu-fb.h>
#include "edid.h"
@@ -183,7 +181,8 @@
static char *fb_mode = "1024x768-32@60";
static unsigned long default_bpp = 32;
-static int monitor_port;
+static enum fsl_diu_monitor_port monitor_port;
+static char *monitor_string;
#if defined(CONFIG_NOT_COHERENT_CACHE)
static u8 *coherence_data;
@@ -201,7 +200,7 @@
void *dummy_aoi_virt;
unsigned int irq;
int fb_enabled;
- int monitor_port;
+ enum fsl_diu_monitor_port monitor_port;
};
struct mfb_info {
@@ -282,6 +281,37 @@
static struct diu_pool pool;
/**
+ * fsl_diu_name_to_port - convert a port name to a monitor port enum
+ *
+ * Takes the name of a monitor port ("dvi", "lvds", or "dlvds") and returns
+ * the enum fsl_diu_monitor_port that corresponds to that string.
+ *
+ * For compatibility with older versions, a number ("0", "1", or "2") is also
+ * supported.
+ *
+ * If the string is unknown, DVI is assumed.
+ *
+ * If the particular port is not supported by the platform, another port
+ * (platform-specific) is chosen instead.
+ */
+static enum fsl_diu_monitor_port fsl_diu_name_to_port(const char *s)
+{
+ enum fsl_diu_monitor_port port = FSL_DIU_PORT_DVI;
+ unsigned long val;
+
+ if (s) {
+ if (!strict_strtoul(s, 10, &val) && (val <= 2))
+ port = (enum fsl_diu_monitor_port) val;
+ else if (strncmp(s, "lvds", 4) == 0)
+ port = FSL_DIU_PORT_LVDS;
+ else if (strncmp(s, "dlvds", 5) == 0)
+ port = FSL_DIU_PORT_DLVDS;
+ }
+
+ return diu_ops.valid_monitor_port(port);
+}
+
+/**
* fsl_diu_alloc - allocate memory for the DIU
* @size: number of bytes to allocate
* @param: returned physical address of memory
@@ -831,9 +861,8 @@
}
}
- ad->pix_fmt =
- diu_ops.get_pixel_format(var->bits_per_pixel,
- machine_data->monitor_port);
+ ad->pix_fmt = diu_ops.get_pixel_format(machine_data->monitor_port,
+ var->bits_per_pixel);
ad->addr = cpu_to_le32(info->fix.smem_start);
ad->src_size_g_alpha = cpu_to_le32((var->yres_virtual << 12) |
var->xres_virtual) | mfbi->g_alpha;
@@ -1439,16 +1468,12 @@
static ssize_t store_monitor(struct device *device,
struct device_attribute *attr, const char *buf, size_t count)
{
- int old_monitor_port;
- unsigned long val;
+ enum fsl_diu_monitor_port old_monitor_port;
struct fsl_diu_data *machine_data =
container_of(attr, struct fsl_diu_data, dev_attr);
- if (strict_strtoul(buf, 10, &val))
- return 0;
-
old_monitor_port = machine_data->monitor_port;
- machine_data->monitor_port = diu_ops.set_sysfs_monitor_port(val);
+ machine_data->monitor_port = fsl_diu_name_to_port(buf);
if (old_monitor_port != machine_data->monitor_port) {
/* All AOIs need adjust pixel format
@@ -1468,7 +1493,17 @@
{
struct fsl_diu_data *machine_data =
container_of(attr, struct fsl_diu_data, dev_attr);
- return diu_ops.show_monitor_port(machine_data->monitor_port, buf);
+
+ switch (machine_data->monitor_port) {
+ case FSL_DIU_PORT_DVI:
+ return sprintf(buf, "DVI\n");
+ case FSL_DIU_PORT_LVDS:
+ return sprintf(buf, "Single-link LVDS\n");
+ case FSL_DIU_PORT_DLVDS:
+ return sprintf(buf, "Dual-link LVDS\n");
+ }
+
+ return 0;
}
static int __devinit fsl_diu_probe(struct platform_device *ofdev)
@@ -1692,8 +1727,7 @@
if (!*opt)
continue;
if (!strncmp(opt, "monitor=", 8)) {
- if (!strict_strtoul(opt + 8, 10, &val) && (val <= 2))
- monitor_port = val;
+ monitor_port = fsl_diu_name_to_port(opt + 8);
} else if (!strncmp(opt, "bpp=", 4)) {
if (!strict_strtoul(opt + 4, 10, &val))
default_bpp = val;
@@ -1746,6 +1780,8 @@
if (fb_get_options("fslfb", &option))
return -ENODEV;
fsl_diu_setup(option);
+#else
+ monitor_port = fsl_diu_name_to_port(monitor_string);
#endif
printk(KERN_INFO "Freescale DIU driver\n");
@@ -1812,7 +1848,7 @@
"Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
module_param_named(bpp, default_bpp, ulong, 0);
MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified mode");
-module_param_named(monitor, monitor_port, int, 0);
-MODULE_PARM_DESC(monitor,
- "Specify the monitor port (0, 1 or 2) if supported by the platform");
+module_param_named(monitor, monitor_string, charp, 0);
+MODULE_PARM_DESC(monitor, "Specify the monitor port "
+ "(\"dvi\", \"lvds\", or \"dlvds\") if supported by the platform");