drm/verisilicon: hdmi: Add feature to check cea mode

There is a problem with output for modes that are not supported, and
due to this, the hdmi sound is not played. Add feature to check cea
mode.

Change-Id: I55e3daa4e6e98f6df26bf91de84c099077e7f339
Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>

diff --git a/drivers/gpu/drm/verisilicon/starfive_hdmi.c b/drivers/gpu/drm/verisilicon/starfive_hdmi.c
index ccd307b..907831b 100644 (file)
--- a/drivers/gpu/drm/verisilicon/starfive_hdmi.c
+++ b/drivers/gpu/drm/verisilicon/starfive_hdmi.c
@@ -388,6 +388,34 @@ static int starfive_hdmi_config_video_timing(struct starfive_hdmi *hdmi,
        return 0;
 }
 
+static void starfive_hdmi_improve_eye_diagram(struct starfive_hdmi *hdmi)
+{
+       switch (hdmi->hdmi_data.vic) {
+       case 95:
+       case 94:
+       case 93:
+               hdmi_writeb(hdmi, 0x100, 0x00);
+               hdmi_writeb(hdmi, 0x1bb, 0x40);
+               hdmi_writeb(hdmi, 0x1bc, 0x40);
+               hdmi_writeb(hdmi, 0x1bd, 0x40);
+               hdmi_writeb(hdmi, 0x1bf, 0x02);
+               hdmi_writeb(hdmi, 0x1c0, 0x22);
+               break;
+       case 16:
+       case 31:
+               hdmi_writeb(hdmi, 0x1bf, 0x02);
+               hdmi_writeb(hdmi, 0x1c0, 0x22);
+               break;
+       case 4:
+       case 3:
+       case 1:
+               hdmi_writeb(hdmi, 0x1bf, 0x00);
+               hdmi_writeb(hdmi, 0x1c0, 0x00);
+               break;
+
+       }
+}
+
 static int starfive_hdmi_setup(struct starfive_hdmi *hdmi,
                               struct drm_display_mode *mode)
 {
@@ -408,6 +436,8 @@ static int starfive_hdmi_setup(struct starfive_hdmi *hdmi,
        /*turn on serializer*/
        hdmi_writeb(hdmi, STARFIVE_SERIALIER_CONTROL, STARFIVE_SERIALIER_ENABLE);
 
+       starfive_hdmi_improve_eye_diagram(hdmi);
+
        starfive_hdmi_tx_phy_power_down(hdmi);
        starfive_hdmi_config_video_timing(hdmi, mode);
        starfive_hdmi_tx_phy_power_on(hdmi);
@@ -511,21 +541,29 @@ starfive_hdmi_connector_mode_valid(struct drm_connector *connector,
                                   struct drm_display_mode *mode)
 {
        const struct pre_pll_config *cfg = pre_pll_cfg_table;
+       u32 vic = drm_match_cea_mode(mode);
        int pclk = mode->clock * 1000;
        bool valid = false;
        int i;
 
+
+       if (pclk > 297000000)
+               return MODE_BAD;
+
        for (i = 0; cfg[i].pixclock != (~0UL); i++) {
                if (pclk == cfg[i].pixclock) {
-                       if (pclk > 297000000)
-                               continue;
-
                        valid = true;
                        break;
                }
        }
 
-       return (valid) ? MODE_OK : MODE_BAD;
+       if (!valid)
+               return MODE_BAD;
+
+       if (vic >= 1)
+               return MODE_OK;
+       else
+               return MODE_BAD;
 }
 
 static int