From: Mythri P K <mythr...@ti.com>
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 <mythr...@ti.com>
---
drivers/video/omap2/dss/ti_hdmi.h | 7 +++++
drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c | 40 +++++++++++++++++++++++++++++
2 files changed, 47 insertions(+), 0 deletions(-)
diff --git a/drivers/video/omap2/dss/ti_hdmi.h
b/drivers/video/omap2/dss/ti_hdmi.h
index 835cfb1..1b485ee 100644
--- a/drivers/video/omap2/dss/ti_hdmi.h
+++ b/drivers/video/omap2/dss/ti_hdmi.h
@@ -42,6 +42,11 @@ enum hdmi_clk_refsel {
HDMI_REFSEL_SYSCLK = 3
};
+enum hdmi_range {
+ HDMI_LIMITED_RANGE = 0,
+ HDMI_FULL_RANGE = 1,
+};
+
/* HDMI timing structure */
struct hdmi_video_timings {
u16 x_res;
@@ -159,6 +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);
@@ -172,5 +178,6 @@ void ti_hdmi_4xxx_wp_dump(struct hdmi_ip_data *ip_data,
struct seq_file *s);
void ti_hdmi_4xxx_pll_dump(struct hdmi_ip_data *ip_data, struct seq_file *s);
void ti_hdmi_4xxx_core_dump(struct hdmi_ip_data *ip_data, struct seq_file *s);
void ti_hdmi_4xxx_phy_dump(struct hdmi_ip_data *ip_data, struct seq_file *s);
+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 b66d82e..a98ce8a 100644
--- a/drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c
+++ b/drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c
@@ -610,6 +610,46 @@ 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:
+ default:
+ /* 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;
+ }
+ return 0;
+}
+
static void hdmi_core_av_packet_config(struct hdmi_ip_data *ip_data,
struct hdmi_core_packet_enable_repeat repeat_cfg)
{
--
1.7.5.4
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