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drm/sysfs: add current display mode to sysfs

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Change-Id: I2a1a699bac74d9fe71151ba1eb8e33e0683a48a5
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
This commit is contained in:
Mark Yao
2017-01-15 16:50:24 +08:00
committed by Algea Cao
parent 2f86e91a4f
commit 6b6e9cabe9
1 changed files with 31 additions and 0 deletions
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31
drivers/gpu/drm/drm_sysfs.c
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@@ -229,16 +229,47 @@ static ssize_t modes_show(struct device *device,
return written;
}
static ssize_t 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(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_mode.attr,
NULL
};