add this node to get the current true mode.
Signed-off-by: Sandy Huang hjc@rock-chips.com --- drivers/gpu/drm/drm_sysfs.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+)
diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c index 939f0032aab1..f39bcd34853b 100644 --- a/drivers/gpu/drm/drm_sysfs.c +++ b/drivers/gpu/drm/drm_sysfs.c @@ -19,6 +19,7 @@ #include <linux/slab.h>
#include <drm/drm_connector.h> +#include <drm/drm_crtc.h> #include <drm/drm_device.h> #include <drm/drm_file.h> #include <drm/drm_modes.h> @@ -236,16 +237,45 @@ static ssize_t modes_show(struct device *device, return written; }
+static ssize_t current_mode_show(struct device *device, + struct device_attribute *attr, + char *buf) +{ + struct drm_connector *connector = to_drm_connector(device); + struct drm_display_mode *mode; + struct drm_crtc_state *crtc_state; + bool interlaced; + int written = 0; + + if (!connector->state || !connector->state->crtc) + return written; + + crtc_state = connector->state->crtc->state; + if (!crtc_state) + return written; + + mode = &crtc_state->mode; + + interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); + written += snprintf(buf + written, PAGE_SIZE - written, "%dx%d%s%d\n", + mode->hdisplay, mode->vdisplay, + interlaced ? "i" : "p", drm_mode_vrefresh(mode)); + + return written; +} + static DEVICE_ATTR_RW(status); static DEVICE_ATTR_RO(enabled); static DEVICE_ATTR_RO(dpms); static DEVICE_ATTR_RO(modes); +static DEVICE_ATTR_RO(current_mode);
static struct attribute *connector_dev_attrs[] = { &dev_attr_status.attr, &dev_attr_enabled.attr, &dev_attr_dpms.attr, &dev_attr_modes.attr, + &dev_attr_current_mode.attr, NULL };