linux-kernel - [PATCH] drm/mipi: set fwnode when a mipi_dsi

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Message-Id: <20210717000345.2345429-1-willmcvicker@google.com>
Date:   Sat, 17 Jul 2021 00:03:45 +0000
From:   Will McVicker <willmcvicker@...gle.com>
To:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Will McVicker <willmcvicker@...gle.com>,
        Saravana Kannan <saravanak@...gle.com>, kernel-team@...roid.com
Subject: [PATCH] drm/mipi: set fwnode when a mipi_dsi_device is registered

This allows the fw_devlink feature to work across mipi_dsi bus devices too.
This feature avoids unnecessary probe deferrals of mipi_dsi devices, defers
consumers of mipi_dsi devices till the mipi_dsi devices probe, and allows
mipi_dsi drivers to implement sync_state() callbacks.

Suggested-by: Saravana Kannan <saravanak@...gle.com>
Signed-off-by: Will McVicker <willmcvicker@...gle.com>
Reviewed-by: Saravana Kannan <saravanak@...gle.com>
---
 drivers/gpu/drm/drm_mipi_dsi.c | 1 +
 1 file changed, 1 insertion(+)

v2:
 Thanks Saravana for the comments! I updated the commit message and added your
 reviewed-by.

diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index 5dd475e82995..469d56cf2a50 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -222,6 +222,7 @@ mipi_dsi_device_register_full(struct mipi_dsi_host *host,
 	}
 
 	dsi->dev.of_node = info->node;
+	dsi->dev.fwnode = of_fwnode_handle(info->node);
 	dsi->channel = info->channel;
 	strlcpy(dsi->name, info->type, sizeof(dsi->name));
 
-- 
2.32.0.402.g57bb445576-goog