From: Mythri P K <[email protected]> Add sysfs support for the uset space to configure limited range or full range quantization for HDMI.
Signed-off-by: Mythri P K <[email protected]> --- drivers/video/omap2/dss/dss.h | 2 + drivers/video/omap2/dss/dss_features.c | 1 + drivers/video/omap2/dss/hdmi.c | 28 +++++++++++++++++++++++ drivers/video/omap2/dss/hdmi_panel.c | 39 +++++++++++++++++++++++++++++++- drivers/video/omap2/dss/ti_hdmi.h | 2 + 5 files changed, 71 insertions(+), 1 deletions(-) diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h index 3cf99a9..0b1b6f2 100644 --- a/drivers/video/omap2/dss/dss.h +++ b/drivers/video/omap2/dss/dss.h @@ -518,6 +518,8 @@ int omapdss_hdmi_display_check_timing(struct omap_dss_device *dssdev, struct omap_video_timings *timings); int omapdss_hdmi_read_edid(u8 *buf, int len); bool omapdss_hdmi_detect(void); +int omapdss_hdmi_get_range(void); +int omapdss_hdmi_set_range(enum hdmi_range range); int hdmi_panel_init(void); void hdmi_panel_exit(void); diff --git a/drivers/video/omap2/dss/dss_features.c b/drivers/video/omap2/dss/dss_features.c index afcb593..544b172 100644 --- a/drivers/video/omap2/dss/dss_features.c +++ b/drivers/video/omap2/dss/dss_features.c @@ -476,6 +476,7 @@ static const struct ti_hdmi_ip_ops omap4_hdmi_functions = { defined(CONFIG_SND_OMAP_SOC_OMAP4_HDMI_MODULE) .audio_enable = ti_hdmi_4xxx_wp_audio_enable, #endif + .configure_range = ti_hdmi_4xxx_configure_range, }; diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c index 92a6679..65397f7 100644 --- a/drivers/video/omap2/dss/hdmi.c +++ b/drivers/video/omap2/dss/hdmi.c @@ -384,6 +384,34 @@ static void hdmi_power_off(struct omap_dss_device *dssdev) hdmi_runtime_put(); } +int omapdss_hdmi_set_range(enum hdmi_range range) +{ + int r = 0; + enum hdmi_range old_range; + + old_range = hdmi.ip_data.range; + hdmi.ip_data.range = range; + + /* HDMI 1.3 section 6.6 VGA (640x480) format requires Full Range */ + if ((range == HDMI_LIMITED_RANGE) && + ((hdmi.ip_data.cfg.cm.code == 4 && + hdmi.ip_data.cfg.cm.mode == HDMI_DVI) || + (hdmi.ip_data.cfg.cm.code == 1 && + hdmi.ip_data.cfg.cm.mode == HDMI_HDMI))) + return -EINVAL; + + r = hdmi.ip_data.ops->configure_range(&hdmi.ip_data); + if (r) + hdmi.ip_data.range = old_range; + + return r; +} + +int omapdss_hdmi_get_range(void) +{ + return hdmi.ip_data.range; +} + int omapdss_hdmi_display_check_timing(struct omap_dss_device *dssdev, struct omap_video_timings *timings) { diff --git a/drivers/video/omap2/dss/hdmi_panel.c b/drivers/video/omap2/dss/hdmi_panel.c index 533d5dc..3166602 100644 --- a/drivers/video/omap2/dss/hdmi_panel.c +++ b/drivers/video/omap2/dss/hdmi_panel.c @@ -33,6 +33,37 @@ static struct { struct mutex hdmi_lock; } hdmi; +static ssize_t hdmi_range_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int r; + + r = omapdss_hdmi_get_range(); + return snprintf(buf, PAGE_SIZE, "%d\n", r); +} + +static ssize_t hdmi_range_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + unsigned long range; + int r ; + + if (strncmp("limited", buf, 7) == 0) + range = 0; + else if (strncmp("full", buf, 4) == 0) + range = 1; + else + return -EINVAL; + + r = omapdss_hdmi_set_range(range); + if (r) + return r; + + return size; +} + +static DEVICE_ATTR(range, S_IRUGO | S_IWUSR, hdmi_range_show, hdmi_range_store); static int hdmi_panel_probe(struct omap_dss_device *dssdev) { @@ -41,6 +72,12 @@ static int hdmi_panel_probe(struct omap_dss_device *dssdev) dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS | OMAP_DSS_LCD_IHS; + /* sysfs entry to provide user space control to set + * quantization range + */ + if (device_create_file(&dssdev->dev, &dev_attr_range)) + DSSERR("failed to create sysfs file\n"); + dssdev->panel.timings = (struct omap_video_timings){640, 480, 25175, 96, 16, 48, 2 , 11, 31}; DSSDBG("hdmi_panel_probe x_res= %d y_res = %d\n", @@ -51,7 +88,7 @@ static int hdmi_panel_probe(struct omap_dss_device *dssdev) static void hdmi_panel_remove(struct omap_dss_device *dssdev) { - + device_remove_file(&dssdev->dev, &dev_attr_range); } static int hdmi_panel_enable(struct omap_dss_device *dssdev) diff --git a/drivers/video/omap2/dss/ti_hdmi.h b/drivers/video/omap2/dss/ti_hdmi.h index ab0f2c2..9a31683 100644 --- a/drivers/video/omap2/dss/ti_hdmi.h +++ b/drivers/video/omap2/dss/ti_hdmi.h @@ -111,6 +111,8 @@ struct ti_hdmi_ip_ops { void (*audio_enable)(struct hdmi_ip_data *ip_data, bool start); #endif + int (*configure_range)(struct hdmi_ip_data *ip_data); + }; /* -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
