now that the drm_display_mode also provides aspect
ratio for all resolutions, this patch adds its usage
to set the active aspect ratio of AVI info frame
packets as per CEA-861-D standard's Table 9.
This is also needed to abide by the 7-27
compliance test of HDMI.
Signed-off-by: Shirish S <s.shirish@xxxxxxxxxxx>
---
drivers/gpu/drm/exynos/exynos_hdmi.c | 33 +++++++++++++++++++++++++++------
1 file changed, 27 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index c021ddc..8aca52a 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -53,8 +53,6 @@
/* AVI header and aspect ratio */
#define HDMI_AVI_VERSION 0x02
#define HDMI_AVI_LENGTH 0x0D
-#define AVI_PIC_ASPECT_RATIO_16_9 (2 << 4)
-#define AVI_SAME_AS_PIC_ASPECT_RATIO 8
/* AUI header info */
#define HDMI_AUI_VERSION 0x01
@@ -65,6 +63,12 @@ enum hdmi_type {
HDMI_TYPE14,
};
+enum active_aspect_ratio {
+ AVI_SAME_AS_PIC_ASPECT_RATIO = 8,
+ AVI_4_3_Center_RATIO,
+ AVI_16_9_Center_RATIO,
+};
+
struct hdmi_resources {
struct clk *hdmi;
struct clk *sclk_hdmi;
@@ -162,6 +166,7 @@ struct hdmi_v14_conf {
struct hdmi_conf_regs {
int pixel_clock;
int cea_video_id;
+ enum hdmi_picture_aspect aspect_ratio;
union {
struct hdmi_v13_conf v13_conf;
struct hdmi_v14_conf v14_conf;
@@ -668,7 +673,6 @@ static void hdmi_reg_infoframe(struct hdmi_context *hdata,
{
u32 hdr_sum;
u8 chksum;
- u32 aspect_ratio;
u32 mod;
u32 vic;
@@ -697,10 +701,25 @@ static void hdmi_reg_infoframe(struct hdmi_context *hdata,
AVI_ACTIVE_FORMAT_VALID |
AVI_UNDERSCANNED_DISPLAY_VALID);
- aspect_ratio = AVI_PIC_ASPECT_RATIO_16_9;
-
- hdmi_reg_writeb(hdata, HDMI_AVI_BYTE(2), aspect_ratio |
+ /*
+ * Set the aspect ratio as per the mode, mentioned in
+ * Table 9 AVI InfoFrame Data Byte 2 of CEA-861-D Standard
+ */
+ switch (hdata->mode_conf.aspect_ratio) {
+ case HDMI_PICTURE_ASPECT_4_3:
+ hdmi_reg_writeb(hdata, HDMI_AVI_BYTE(2), aspect_ratio |
+ AVI_4_3_Center_RATIO);
+ break;
+ case HDMI_PICTURE_ASPECT_16_9:
+ hdmi_reg_writeb(hdata, HDMI_AVI_BYTE(2), aspect_ratio |
+ AVI_16_9_Center_RATIO);
+ break;
+ case HDMI_PICTURE_ASPECT_NONE:
+ default:
+ hdmi_reg_writeb(hdata, HDMI_AVI_BYTE(2), aspect_ratio |
AVI_SAME_AS_PIC_ASPECT_RATIO);
+ break;
+ }
vic = hdata->mode_conf.cea_video_id;
hdmi_reg_writeb(hdata, HDMI_AVI_BYTE(4), vic);
@@ -1421,6 +1440,7 @@ static void hdmi_v13_mode_set(struct hdmi_context *hdata,
hdata->mode_conf.cea_video_id =
drm_match_cea_mode((struct drm_display_mode *)m);
hdata->mode_conf.pixel_clock = m->clock * 1000;
+ hdata->mode_conf.aspect_ratio = m->picture_aspect_ratio;
hdmi_set_reg(core->h_blank, 2, m->htotal - m->hdisplay);
hdmi_set_reg(core->h_v_line, 3, (m->htotal << 12) | m->vtotal);
@@ -1517,6 +1537,7 @@ static void hdmi_v14_mode_set(struct hdmi_context *hdata,
hdata->mode_conf.cea_video_id =
drm_match_cea_mode((struct drm_display_mode *)m);
hdata->mode_conf.pixel_clock = m->clock * 1000;
+ hdata->mode_conf.aspect_ratio = m->picture_aspect_ratio;
hdmi_set_reg(core->h_blank, 2, m->htotal - m->hdisplay);
hdmi_set_reg(core->v_line, 2, m->vtotal);
--
1.7.10.4
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