Unverified Commit 85854fa9 authored by Marek Vasut's avatar Marek Vasut Committed by Robert Foss
Browse files

drm/bridge: ti-sn65dsi83: Check link status register after enabling the bridge 



In rare cases, the bridge may not start up correctly, which usually
leads to no display output. In case this happens, warn about it in
the kernel log.

Signed-off-by: default avatarMarek Vasut <marex@denx.de>
Cc: Jagan Teki <jagan@amarulasolutions.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Robert Foss <robert.foss@linaro.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: default avatarRobert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220213022648.495895-1-marex@denx.de
parent 17a9c1aa

drivers/gpu/drm/bridge/ti-sn65dsi83.c

+5 −0
Original line number Diff line number Diff line
@@ -488,6 +488,11 @@ static void sn65dsi83_atomic_enable(struct drm_bridge *bridge, 
	/* Clear all errors that got asserted during initialization. */

	regmap_read(ctx->regmap, REG_IRQ_STAT, &pval);

	regmap_write(ctx->regmap, REG_IRQ_STAT, pval);



	usleep_range(10000, 12000);

	regmap_read(ctx->regmap, REG_IRQ_STAT, &pval);

	if (pval)

		dev_err(ctx->dev, "Unexpected link status 0x%02x\n", pval);

}



static void sn65dsi83_atomic_disable(struct drm_bridge *bridge,