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Commit f2921d8c authored by Hoegeun Kwon's avatar Hoegeun Kwon Committed by Inki Dae
Browse files

drm/exynos: dsi: Fix the parse_dt function 



The dsi + panel is a parental relationship, so OF grpah is not needed.
Therefore, the current dsi_parse_dt function will throw an error,
because there is no linked OF graph for the case fimd + dsi + panel.

Parse the Pll burst and esc clock frequency properties in dsi_parse_dt()
and create a bridge_node only if there is an OF graph associated with dsi.

Signed-off-by: default avatarHoegeun Kwon <hoegeun.kwon@samsung.com>
Reviewed-by: default avatarAndrzej Hajda <a.hajda@samsung.com>
Reviewed-by: default avatarAndi Shyti <andi.shyti@samsung.com>
Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
parent 4013ef48

drivers/gpu/drm/exynos/exynos_drm_dsi.c

+5 −17
Original line number Diff line number Diff line
@@ -1633,7 +1633,6 @@ static int exynos_dsi_parse_dt(struct exynos_dsi *dsi) 
{

	struct device *dev = dsi->dev;

	struct device_node *node = dev->of_node;

	struct device_node *ep;

	int ret;



	ret = exynos_dsi_of_read_u32(node, "samsung,pll-clock-frequency",
@@ -1641,32 +1640,21 @@ static int exynos_dsi_parse_dt(struct exynos_dsi *dsi) 
	if (ret < 0)

		return ret;



	ep = of_graph_get_endpoint_by_regs(node, DSI_PORT_OUT, 0);

	if (!ep) {

		dev_err(dev, "no output port with endpoint specified\n");

		return -EINVAL;

	}



	ret = exynos_dsi_of_read_u32(ep, "samsung,burst-clock-frequency",

	ret = exynos_dsi_of_read_u32(node, "samsung,burst-clock-frequency",

				     &dsi->burst_clk_rate);

	if (ret < 0)

		goto end;

		return ret;



	ret = exynos_dsi_of_read_u32(ep, "samsung,esc-clock-frequency",

	ret = exynos_dsi_of_read_u32(node, "samsung,esc-clock-frequency",

				     &dsi->esc_clk_rate);

	if (ret < 0)

		goto end;



	of_node_put(ep);

		return ret;



	dsi->bridge_node = of_graph_get_remote_node(node, DSI_PORT_OUT, 0);

	if (!dsi->bridge_node)

		return -EINVAL;



end:

	of_node_put(ep);



	return ret;

	return 0;

}



static int exynos_dsi_bind(struct device *dev, struct device *master,