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[media] v4l: s5p-tv: hdmi: fix mode synchronization

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The mode setup was applied on HDMI hardware only on resume event.  This caused
problem if HDMI was not suspended between mode switches.  This patch fixes this
problem by setting a dirty flag on a mode change event.  If flag is set, then
new mode is applied on the next stream-on event.

Signed-off-by: Tomasz Stanislawski <t.stanislaws@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Tomasz Stanislawski 2012-03-09 08:05:24 -03:00 committed by Mauro Carvalho Chehab
parent 3f468accf2
commit 2fd07a4a9e
1 changed files with 16 additions and 4 deletions
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20
drivers/media/video/s5p-tv/hdmi_drv.c
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@ -87,6 +87,8 @@ struct hdmi_device {
struct v4l2_subdev *mhl_sd;
/** configuration of current graphic mode */
const struct hdmi_timings *cur_conf;
/** flag indicating that timings are dirty */
int cur_conf_dirty;
/** current preset */
u32 cur_preset;
/** other resources */
@ -253,6 +255,10 @@ static int hdmi_conf_apply(struct hdmi_device *hdmi_dev)
dev_dbg(dev, "%s\n", __func__);
/* skip if conf is already synchronized with HW */
if (!hdmi_dev->cur_conf_dirty)
return 0;
/* reset hdmiphy */
hdmi_write_mask(hdmi_dev, HDMI_PHY_RSTOUT, ~0, HDMI_PHY_SW_RSTOUT);
mdelay(10);
@ -278,6 +284,8 @@ static int hdmi_conf_apply(struct hdmi_device *hdmi_dev)
/* setting core registers */
hdmi_timing_apply(hdmi_dev, conf);
hdmi_dev->cur_conf_dirty = 0;
return 0;
}
@ -500,6 +508,10 @@ static int hdmi_streamon(struct hdmi_device *hdev)
dev_dbg(dev, "%s\n", __func__);
ret = hdmi_conf_apply(hdev);
if (ret)
return ret;
ret = v4l2_subdev_call(hdev->phy_sd, video, s_stream, 1);
if (ret)
return ret;
@ -620,6 +632,7 @@ static int hdmi_s_dv_preset(struct v4l2_subdev *sd,
return -EINVAL;
}
hdev->cur_conf = conf;
hdev->cur_conf_dirty = 1;
hdev->cur_preset = preset->preset;
return 0;
}
@ -689,6 +702,8 @@ static int hdmi_runtime_suspend(struct device *dev)
dev_dbg(dev, "%s\n", __func__);
v4l2_subdev_call(hdev->mhl_sd, core, s_power, 0);
hdmi_resource_poweroff(&hdev->res);
/* flag that device context is lost */
hdev->cur_conf_dirty = 1;
return 0;
}
@ -702,10 +717,6 @@ static int hdmi_runtime_resume(struct device *dev)
hdmi_resource_poweron(&hdev->res);
ret = hdmi_conf_apply(hdev);
if (ret)
goto fail;
/* starting MHL */
ret = v4l2_subdev_call(hdev->mhl_sd, core, s_power, 1);
if (hdev->mhl_sd && ret)
@ -946,6 +957,7 @@ static int __devinit hdmi_probe(struct platform_device *pdev)
hdmi_dev->cur_preset = HDMI_DEFAULT_PRESET;
/* FIXME: missing fail preset is not supported */
hdmi_dev->cur_conf = hdmi_preset2timings(hdmi_dev->cur_preset);
hdmi_dev->cur_conf_dirty = 1;
/* storing subdev for call that have only access to struct device */
dev_set_drvdata(dev, sd);