From 2fd07a4a9e0d34fc53443601781ae58b2e8f1649 Mon Sep 17 00:00:00 2001 From: Tomasz Stanislawski Date: Fri, 9 Mar 2012 08:05:24 -0300 Subject: [PATCH] [media] v4l: s5p-tv: hdmi: fix mode synchronization 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 Signed-off-by: Kyungmin Park Signed-off-by: Sylwester Nawrocki Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/s5p-tv/hdmi_drv.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/media/video/s5p-tv/hdmi_drv.c b/drivers/media/video/s5p-tv/hdmi_drv.c index eefb903313c3..20cb6eef2979 100644 --- a/drivers/media/video/s5p-tv/hdmi_drv.c +++ b/drivers/media/video/s5p-tv/hdmi_drv.c @@ -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); -- GitLab