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drm/omap: dsi: Ensure the device is active during probe

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The probe function performs hardware access to read the number of
supported data lanes from a configuration register and thus requires the
device to be active. Ensure this by surrounding the access with
dsi_runtime_get() and dsi_runtime_put() calls.

Fixes: edb715dffd ("drm/omap: dss: dsi: Move initialization code from bind to probe")
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181110111654.4387-4-laurent.pinchart@ideasonboard.com
This commit is contained in:
Laurent Pinchart 2018-11-10 13:16:53 +02:00 committed by Tomi Valkeinen
parent f8523b64d2
commit 350c03e880
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/omapdrm/dss/dsi.c
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@ -5409,11 +5409,14 @@ static int dsi_probe(struct platform_device *pdev)
/* DSI on OMAP3 doesn't have register DSI_GNQ, set number
* of data to 3 by default */
if (dsi->data->quirks & DSI_QUIRK_GNQ)
if (dsi->data->quirks & DSI_QUIRK_GNQ) {
dsi_runtime_get(dsi);
/* NB_DATA_LANES */
dsi->num_lanes_supported = 1 + REG_GET(dsi, DSI_GNQ, 11, 9);
else
dsi_runtime_put(dsi);
} else {
dsi->num_lanes_supported = 3;
}
r = dsi_init_output(dsi);
if (r)