Imx8mp & mipi-dsi display: drm_bridge_attach fails with error -19

[henrique.tx]

Hi @Mowlwurf!

@Mowlwurf

Now we are evaluating a Verdin iMX8MP Q 2GB WB IT with BSP6.2 on a custom carrier board for better graphical performance.

Could you please update your BSP to the latest quarterly (currently 6.5.0)? BSP 6.2.0 is not maintained.

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From the device tree you shared, I see:

@Mowlwurf

		enable-gpios = <&gpio5 0 GPIO_ACTIVE_HIGH>;	// I2S_2_BCLK (SODIMM 42)
[...]

			MX8MP_IOMUXC_SAI3_TXC__GPIO5_IO00		0x146	/* SODIMM 42 - reset of display (pulled-up as active-low) */

For the same pin you commented that it is active low, but you set it as GPIO_ACTIVE_HIGH. Maybe it should be GPIO_ACTIVE_LOW according to you comment?

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From the solution of another thread of yours (below),

Verdin imx8mm: suspend/resume of panel-simple failed

Hello @Mowlwurf , Not on this Raydium driver, but if you have the display working with panel-simple you could try to do something like this: diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c index 00d66d563b8ed..c6721d10aa6da 100644 --- a/drivers/gpu/drm/panel/panel-simple.c +++ b/drivers/gpu/drm/panel/panel-simple.c @@ -482,12 +482,6 @@ static int panel_simple_prepare(struct drm_panel *panel) if (p->prepared) return 0; - r…

I assume you have applied the same patch to the panel_simple, right? If yes, have you tried it without that patch?

Best regards,