On the A31, the HDMI DDC block is different from the one in the
other SoCs. As far as the DDC clock goes, it has no pre-divider,
as it is clocked from a slower parent clock, not the TMDS clock.
The divider offset from the register value is different. And the
clock control register is at a different offset.
This patch adds support for this variant.
Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx>
---
drivers/gpu/drm/sun4i/sun4i_hdmi.h | 1 +
drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c | 11 +++++++++++
2 files changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi.h b/drivers/gpu/drm/sun4i/sun4i_hdmi.h
index 08c514672fd3..c39c2a245339 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi.h
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi.h
@@ -178,6 +178,7 @@ struct sun4i_hdmi {
};
int sun4i_ddc_create(struct sun4i_hdmi *hdmi, struct clk *clk);
+int sun6i_ddc_create(struct sun4i_hdmi *hdmi, struct clk *clk);
int sun4i_tmds_create(struct sun4i_hdmi *hdmi);
int sun6i_tmds_create(struct sun4i_hdmi *hdmi);
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c
index 9a6b6243e977..b1395e7b242c 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c
@@ -151,3 +151,14 @@ int sun4i_ddc_create(struct sun4i_hdmi *hdmi, struct clk *parent)
{
return _sun4i_ddc_create(hdmi, parent, &sun4i_variant);
}
+
+static const struct sun4i_ddc_variant sun6i_variant = {
+ .reg_offset = SUN6I_HDMI_DDC_CLK_REG,
+ .pre_divider = 1,
+ .m_offset = 2,
+};
+
+int sun6i_ddc_create(struct sun4i_hdmi *hdmi, struct clk *parent)
+{
+ return _sun4i_ddc_create(hdmi, parent, &sun6i_variant);
+}
--
2.11.0
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