From: Mythri P K <mythripk@xxxxxx>
Configure the IP to support the limited range and full range quantization
mode. If the full range is configured HDMI transmitter will expand the range
of pixel data from 16-235 to full 8 bit 0-235.
Signed-off-by: Mythri P K <mythripk@xxxxxx>
---
drivers/video/omap2/dss/ti_hdmi.h | 2 +
drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c | 41 +++++++++++++++++++++++++++++
include/video/omapdss.h | 5 +++
3 files changed, 48 insertions(+), 0 deletions(-)
diff --git a/drivers/video/omap2/dss/ti_hdmi.h b/drivers/video/omap2/dss/ti_hdmi.h
index 46e776c..ab0f2c2 100644
--- a/drivers/video/omap2/dss/ti_hdmi.h
+++ b/drivers/video/omap2/dss/ti_hdmi.h
@@ -164,6 +164,7 @@ struct hdmi_ip_data {
struct hdmi_config cfg;
struct hdmi_pll_info pll_data;
struct hdmi_core_infoframe_avi avi_cfg;
+ enum hdmi_range range;
};
int ti_hdmi_4xxx_phy_enable(struct hdmi_ip_data *ip_data);
void ti_hdmi_4xxx_phy_disable(struct hdmi_ip_data *ip_data);
@@ -181,4 +182,5 @@ void ti_hdmi_4xxx_phy_dump(struct hdmi_ip_data *ip_data, struct seq_file *s);
defined(CONFIG_SND_OMAP_SOC_OMAP4_HDMI_MODULE)
void ti_hdmi_4xxx_wp_audio_enable(struct hdmi_ip_data *ip_data, bool enable);
#endif
+int ti_hdmi_4xxx_configure_range(struct hdmi_ip_data *ip_data);
#endif
diff --git a/drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c b/drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c
index 6f93271..b0a9573 100644
--- a/drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c
+++ b/drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c
@@ -610,6 +610,47 @@ static void hdmi_core_aux_infoframe_avi_config(struct hdmi_ip_data *ip_data)
hdmi_write_reg(av_base, HDMI_CORE_AV_AVI_CHSUM, checksum);
}
+int ti_hdmi_4xxx_configure_range(struct hdmi_ip_data *ip_data)
+{
+ int var;
+
+ switch (ip_data->range) {
+ /*
+ * Setting the AVI infroframe to respective limited range
+ * 0 if limited range 1 if full range
+ */
+ case HDMI_LIMITED_RANGE:
+ ip_data->avi_cfg.db3_q_range = HDMI_INFOFRAME_AVI_DB3Q_LR;
+ hdmi_core_aux_infoframe_avi_config(ip_data);
+ var = hdmi_read_reg(hdmi_core_sys_base(ip_data),
+ HDMI_CORE_SYS_VID_ACEN);
+ var = FLD_MOD(var, 1, 1, 1);
+ hdmi_write_reg(hdmi_core_sys_base(ip_data),
+ HDMI_CORE_SYS_VID_ACEN, var);
+ break;
+ case HDMI_FULL_RANGE:
+ /* HDMI 1.3 section 6.6 YCBCR components shall
+ * always be Limited Range
+ */
+ if (ip_data->avi_cfg.db1_format ==
+ HDMI_INFOFRAME_AVI_DB1Y_YUV422) {
+ pr_err("Only limited range is supported for YUV");
+ return -EINVAL;
+ }
+ ip_data->avi_cfg.db3_q_range = HDMI_INFOFRAME_AVI_DB3Q_FR;
+ hdmi_core_aux_infoframe_avi_config(ip_data);
+ var = hdmi_read_reg(hdmi_core_sys_base(ip_data),
+ HDMI_CORE_SYS_VID_MODE);
+ var = FLD_MOD(var, 1, 4, 4);
+ hdmi_write_reg(hdmi_core_sys_base(ip_data),
+ HDMI_CORE_SYS_VID_MODE, var);
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
static void hdmi_core_av_packet_config(struct hdmi_ip_data *ip_data,
struct hdmi_core_packet_enable_repeat repeat_cfg)
{
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 062b3b2..29f4e78 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -204,6 +204,11 @@ enum omap_hdmi_flags {
OMAP_HDMI_SDA_SCL_EXTERNAL_PULLUP = 1 << 0,
};
+enum hdmi_range {
+ HDMI_LIMITED_RANGE = 0,
+ HDMI_FULL_RANGE = 1,
+};
+
/* RFBI */
struct rfbi_timings {
--
1.7.5.4
--
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