From: Sandy Huang <hjc@rock-chips.com>
To: heiko@sntech.de,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>
Cc: huangtao@rock-chips.com, linux-kernel@vger.kernel.org,
Sandy Huang <hjc@rock-chips.com>,
dri-devel@lists.freedesktop.org, kever.yang@rock-chips.com,
linux-rockchip@lists.infradead.org, andy.yan@rock-chips.com
Subject: [PATCH] drm: sysfs: Add to get current mode
Date: Wed, 5 Aug 2020 16:36:46 +0800 [thread overview]
Message-ID: <20200805083646.4123-1-hjc@rock-chips.com> (raw)
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
};
--
2.17.1
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
next reply other threads:[~2020-08-06 11:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-05 8:36 Sandy Huang [this message]
2020-08-05 9:36 ` [PATCH] drm: sysfs: Add to get current mode Daniel Vetter
2020-08-05 10:03 ` Huang Jiachai
2020-08-05 11:26 ` daniel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200805083646.4123-1-hjc@rock-chips.com \
--to=hjc@rock-chips.com \
--cc=airlied@linux.ie \
--cc=andy.yan@rock-chips.com \
--cc=daniel@ffwll.ch \
--cc=dri-devel@lists.freedesktop.org \
--cc=heiko@sntech.de \
--cc=huangtao@rock-chips.com \
--cc=kever.yang@rock-chips.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rockchip@lists.infradead.org \
--cc=maarten.lankhorst@linux.intel.com \
--cc=mripard@kernel.org \
--cc=tzimmermann@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).