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Subject[PATCH v2] drm: bridge: dw-hdmi: add HDMI vendor specific infoframe config
Date
Vendor specific infoframe is mandatory for 4K2K resolution.
Without this, the HDMI protocol compliance fails.

Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
---
drivers/gpu/drm/bridge/dw-hdmi.c | 47 ++++++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/bridge/dw-hdmi.h | 4 ++++
2 files changed, 51 insertions(+)

diff --git a/drivers/gpu/drm/bridge/dw-hdmi.c b/drivers/gpu/drm/bridge/dw-hdmi.c
index 9a9ec27..07a16b1 100644
--- a/drivers/gpu/drm/bridge/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/dw-hdmi.c
@@ -1195,6 +1195,52 @@ static void hdmi_config_AVI(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
hdmi_writeb(hdmi, (frame.right_bar >> 8) & 0xff, HDMI_FC_AVISRB1);
}

+static void hdmi_config_vendor_specific_infoframe(struct dw_hdmi *hdmi,
+ struct drm_display_mode *mode)
+{
+ struct hdmi_vendor_infoframe frame;
+ u8 buffer[10];
+ ssize_t err;
+
+ err = drm_hdmi_vendor_infoframe_from_display_mode(&frame, mode);
+ if (err)
+ return;
+
+ err = hdmi_vendor_infoframe_pack(&frame, buffer, sizeof(buffer));
+ if (!err) {
+ dev_err(hdmi->dev, "Failed to pack vendor infoframe: %zd\n",
+ err);
+ return;
+ }
+ hdmi_mask_writeb(hdmi, 0, HDMI_FC_DATAUTO0, HDMI_FC_DATAUTO0_VSD_OFFSET,
+ HDMI_FC_DATAUTO0_VSD_MASK);
+
+ /* Set the length of HDMI vendor specific InfoFrame payload */
+ hdmi_writeb(hdmi, buffer[2], HDMI_FC_VSDSIZE);
+
+ /* Set 24bit IEEE Registration Identifier */
+ hdmi_writeb(hdmi, buffer[4], HDMI_FC_VSDIEEEID0);
+ hdmi_writeb(hdmi, buffer[5], HDMI_FC_VSDIEEEID1);
+ hdmi_writeb(hdmi, buffer[6], HDMI_FC_VSDIEEEID2);
+
+ /* Set HDMI_Video_Format and HDMI_VIC/3D_Structure */
+ hdmi_writeb(hdmi, buffer[7], HDMI_FC_VSDPAYLOAD0);
+ hdmi_writeb(hdmi, buffer[8], HDMI_FC_VSDPAYLOAD1);
+
+ if (frame.s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
+ hdmi_writeb(hdmi, buffer[9], HDMI_FC_VSDPAYLOAD2);
+
+ /* Packet frame interpolation */
+ hdmi_writeb(hdmi, 1, HDMI_FC_DATAUTO1);
+
+ /* Auto packets per frame and line spacing */
+ hdmi_writeb(hdmi, 0x11, HDMI_FC_DATAUTO2);
+
+ /* Configures the Frame Composer On RDRB mode */
+ hdmi_mask_writeb(hdmi, 1, HDMI_FC_DATAUTO0, HDMI_FC_DATAUTO0_VSD_OFFSET,
+ HDMI_FC_DATAUTO0_VSD_MASK);
+}
+
static void hdmi_av_composer(struct dw_hdmi *hdmi,
const struct drm_display_mode *mode)
{
@@ -1446,6 +1492,7 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)

/* HDMI Initialization Step F - Configure AVI InfoFrame */
hdmi_config_AVI(hdmi, mode);
+ hdmi_config_vendor_specific_infoframe(hdmi, mode);
} else {
dev_dbg(hdmi->dev, "%s DVI mode\n", __func__);
}
diff --git a/drivers/gpu/drm/bridge/dw-hdmi.h b/drivers/gpu/drm/bridge/dw-hdmi.h
index 325b0b8..c59f87e 100644
--- a/drivers/gpu/drm/bridge/dw-hdmi.h
+++ b/drivers/gpu/drm/bridge/dw-hdmi.h
@@ -854,6 +854,10 @@ enum {
HDMI_FC_DBGFORCE_FORCEAUDIO = 0x10,
HDMI_FC_DBGFORCE_FORCEVIDEO = 0x1,

+/* FC_DATAUTO0 field values */
+ HDMI_FC_DATAUTO0_VSD_MASK = 0x08,
+ HDMI_FC_DATAUTO0_VSD_OFFSET = 3,
+
/* PHY_CONF0 field values */
HDMI_PHY_CONF0_PDZ_MASK = 0x80,
HDMI_PHY_CONF0_PDZ_OFFSET = 7,
--
1.9.1

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