So far we always encountered socs with 2 output crtcs needing the driver
to tell the hdmi block which output to connect to. But there also exist
socs with only one crtc like the rk3228, rk3328 and rk3368.
So adapt the register field to simply carry a negative value to signal
that now output-switching is necessary.
Signed-off-by: Heiko Stuebner <he...@sntech.de>
---
drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index 1eb02a82fd91..304f61bd2eec 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -36,7 +36,7 @@
* @lcdsel_lit: reg value of selecting vop little for HDMI
*/
struct rockchip_hdmi_chip_data {
- u32 lcdsel_grf_reg;
+ int lcdsel_grf_reg;
u32 lcdsel_big;
u32 lcdsel_lit;
};
@@ -252,6 +252,9 @@ static void dw_hdmi_rockchip_encoder_enable(struct
drm_encoder *encoder)
u32 val;
int ret;
+ if (hdmi->chip_data->lcdsel_grf_reg < 0)
+ return;
+
ret = drm_of_encoder_active_endpoint_id(hdmi->dev->of_node, encoder);
if (ret)
val = hdmi->chip_data->lcdsel_lit;
--
2.15.1
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