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drm/sun4i: Clear encoder->bridge if a bridge is not found 

The KMS helpers (drm_atomic_helper_check_modeset/mode_fixup) pass
encoder->bridge directly to drm_bridge_mode_fixup, which expects a
valid pointer, or NULL (in which case it just returns).

Clear encoder->bridge if a bridge is not found, instead of keeping
the ERR_PTR value.

Since other drm_bridge functions also follow this pattern of checking
for a non-NULL pointer, we can drop the ifs around the calls and just
pass the pointer directly.

Fixes: 894f5a9f4b ("drm/sun4i: Add bridge support")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
This commit is contained in:
Chen-Yu Tsai 2016-09-01 14:13:32 +08:00 committed by Maxime Ripard
parent 4b30950252
commit b5644a5e72
1 changed files with 6 additions and 4 deletions
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10
drivers/gpu/drm/sun4i/sun4i_rgb.c
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@ -156,8 +156,8 @@ static void sun4i_rgb_encoder_enable(struct drm_encoder *encoder)
drm_panel_enable(tcon->panel);
}
if (!IS_ERR(encoder->bridge))
drm_bridge_enable(encoder->bridge);
/* encoder->bridge can be NULL; drm_bridge_enable checks for it */
drm_bridge_enable(encoder->bridge);
sun4i_tcon_channel_enable(tcon, 0);
}
@ -172,8 +172,8 @@ static void sun4i_rgb_encoder_disable(struct drm_encoder *encoder)
sun4i_tcon_channel_disable(tcon, 0);
if (!IS_ERR(encoder->bridge))
drm_bridge_disable(encoder->bridge);
/* encoder->bridge can be NULL; drm_bridge_disable checks for it */
drm_bridge_disable(encoder->bridge);
if (!IS_ERR(tcon->panel)) {
drm_panel_disable(tcon->panel);
@ -278,6 +278,8 @@ int sun4i_rgb_init(struct drm_device *drm)
dev_err(drm->dev, "Couldn't attach our bridge\n");
goto err_cleanup_connector;
}
} else {
encoder->bridge = NULL;
}
return 0;