diff options
Diffstat (limited to 'drivers/video/omap2')
| -rw-r--r-- | drivers/video/omap2/dss/output.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/output.c b/drivers/video/omap2/dss/output.c index 388a6c997b9..1a84b79d558 100644 --- a/drivers/video/omap2/dss/output.c +++ b/drivers/video/omap2/dss/output.c @@ -16,6 +16,7 @@ */ #include <linux/kernel.h> +#include <linux/module.h> #include <linux/platform_device.h> #include <linux/slab.h> @@ -24,6 +25,72 @@ #include "dss.h" static LIST_HEAD(output_list); +static DEFINE_MUTEX(output_lock); + +int omapdss_output_set_device(struct omap_dss_output *out, + struct omap_dss_device *dssdev) +{ + int r; + + mutex_lock(&output_lock); + + if (out->device) { + DSSERR("output already has device %s connected to it\n", + out->device->name); + r = -EINVAL; + goto err; + } + + if (out->type != dssdev->type) { + DSSERR("output type and display type don't match\n"); + r = -EINVAL; + goto err; + } + + out->device = dssdev; + dssdev->output = out; + + mutex_unlock(&output_lock); + + return 0; +err: + mutex_unlock(&output_lock); + + return r; +} +EXPORT_SYMBOL(omapdss_output_set_device); + +int omapdss_output_unset_device(struct omap_dss_output *out) +{ + int r; + + mutex_lock(&output_lock); + + if (!out->device) { + DSSERR("output doesn't have a device connected to it\n"); + r = -EINVAL; + goto err; + } + + if (out->device->state != OMAP_DSS_DISPLAY_DISABLED) { + DSSERR("device %s is not disabled, cannot unset device\n", + out->device->name); + r = -EINVAL; + goto err; + } + + out->device->output = NULL; + out->device = NULL; + + mutex_unlock(&output_lock); + + return 0; +err: + mutex_unlock(&output_lock); + + return r; +} +EXPORT_SYMBOL(omapdss_output_unset_device); void dss_register_output(struct omap_dss_output *out) { |