Hello Morimoto-san,
Until I can get my ULCB to boot to test this here, I'll try to help you
debug the problem.
On Mon, Nov 01, 2021 at 03:49:24PM +0900, Kuninori Morimoto wrote:
>
> Hi Laurent, again
>
> About this topic, v5.15 was released, but it still
> has "No soundcards" issue.
> There is no dw-hdmi, thus no soundcards
>
> ...
> [ 1.431196] printk: console [ttySC0] enabled
> => [ 1.442432] rcar-du feb00000.display: failed to initialize DRM/KMS (-6)
> [ 1.481179] loop: module loaded
> ...
> [ 9.568307] ALSA device list:
> => [ 9.571446] No soundcards found.
> ...
Do you get any error message from the dw-hdmi driver ? In particular,
I'd like to know if the dw_hdmi_parse_dt() function fails. There are
error messages in all error paths but the last one, the following patch
may help debugging the problem.
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 54d8fdad395f..8be3a1042ede 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -3209,10 +3209,14 @@ static int dw_hdmi_parse_dt(struct dw_hdmi *hdmi)
}
hdmi->next_bridge = of_drm_find_bridge(remote);
- of_node_put(remote);
- if (!hdmi->next_bridge)
+ if (!hdmi->next_bridge) {
+ dev_err(hdmi->dev, "no bridge found for port@%u (%pOF)\n",
+ hdmi->plat_data->output_port, remote);
+ of_node_put(remote);
return -EPROBE_DEFER;
+ }
+ of_node_put(remote);
return 0;
}
Is the CONFIG_DRM_DISPLAY_CONNECTOR option enabled in your kernel ?
> I re-start works for me if I reverted this patch
>
> --------------------------------
> commit d0f44e0dac29aca3f85d238dfbcd2e52450b38dc
> Author: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
> Date: Mon May 25 07:05:26 2020 +0300
>
> drm: rcar-du: dw-hdmi: Set output port number
>
> Report the DT output port number in dw_hdmi_plat_data to connect to the
> next bridge in the dw-hdmi driver.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
> Tested-by: Kieran Bingham <kieran.bingham@xxxxxxxxxxxxxxxx> # On V3U
> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
> --------------------------------
>
> ...
> [ 1.431130] printk: console [ttySC0] enabled
> => [ 1.442219] rcar-du feb00000.display: failed to initialize DRM/KMS (-6)
> => [ 1.451050] rcar-dw-hdmi fead0000.hdmi: Detected HDMI TX controller v2.01a with HDCP (DWC HDMI 2.0 TX PHY)
> => [ 1.461560] rcar-dw-hdmi fead0000.hdmi: registered DesignWare HDMI I2C bus driver
> [ 1.501043] loop: module loaded
> ...
> [ 9.180464] ALSA device list:
> => [ 9.183519] #0: rcar-sound
> ...
--
Regards,
Laurent Pinchart
