[PATCH v5 3/5] drm/exynos: dsi: Fix the parse_dt function

[Hoegeun Kwon]

Hi inki,

Could you check the this patch?
For reference, patch 1/5 and 2/5 have already been applied to Krzysztof 
tree.

Best regards,
Hoegeun


On 03/08/2017 01:54 PM, Hoegeun Kwon wrote:
> 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: Hoegeun Kwon <hoegeun.kwon at samsung.com>
> Reviewed-by: Andrzej Hajda <a.hajda at samsung.com>
> Reviewed-by: Andi Shyti <andi.shyti at samsung.com>
> ---
>   drivers/gpu/drm/exynos/exynos_drm_dsi.c | 32 ++++++++------------------------
>   1 file changed, 8 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> index f5c04d0..2d4e118 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> @@ -1652,39 +1652,23 @@ 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;
>   
>   	ep = of_graph_get_next_endpoint(node, NULL);
> -	if (!ep) {
> -		ret = -EINVAL;
> -		goto end;
> -	}
> -
> -	dsi->bridge_node = of_graph_get_remote_port_parent(ep);
> -	if (!dsi->bridge_node) {
> -		ret = -EINVAL;
> -		goto end;
> +	if (ep) {
> +		dsi->bridge_node = of_graph_get_remote_port_parent(ep);
> +		of_node_put(ep);
>   	}
> -end:
> -	of_node_put(ep);
>   
> -	return ret;
> +	return 0;
>   }
>   
>   static int exynos_dsi_bind(struct device *dev, struct device *master,