Hi Inki,
There is no problem with the DSI panels, so there is nothing to fix.
DSI receives notifications about panel presence via mipi dsi bus,
so it can attach/detach it to/from drm using connector's hotplug mechansim.
Deferring DSI in unnecessary.
Regards
Andrzej
On 05/27/2014 02:42 PM, Inki Dae wrote:
> This patch makes sure that mipi dsi driver makes it re-probe
> in case that panel driver isn't probed yet.
>
> For this, it checks if panel driver is probed or not before
> component_add() is called.
>
> Signed-off-by: Inki Dae <inki....@samsung.com>
> Acked-by: Kyungmin Park <kyungmin.p...@samsung.com>
> ---
> drivers/gpu/drm/exynos/exynos_drm_dsi.c | 38
> +++++++++++++++----------------
> 1 file changed, 19 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> index 1421d9b..22503f3 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> @@ -1166,11 +1166,8 @@ exynos_dsi_detect(struct drm_connector *connector,
> bool force)
> {
> struct exynos_dsi *dsi = connector_to_dsi(connector);
>
> - if (!dsi->panel) {
> - dsi->panel = of_drm_find_panel(dsi->panel_node);
> - if (dsi->panel)
> - drm_panel_attach(dsi->panel, &dsi->connector);
> - } else if (!dsi->panel_node) {
> + /* Power off if panel driver is removed. */
> + if (!dsi->panel_node) {
> struct exynos_drm_display *display;
>
> display = platform_get_drvdata(to_platform_device(dsi->dev));
> @@ -1383,19 +1380,8 @@ static int exynos_dsi_bind(struct device *dev, struct
> device *master,
> void *data)
> {
> struct drm_device *drm_dev = data;
> - struct exynos_dsi *dsi;
> - int ret;
>
> - ret = exynos_drm_create_enc_conn(drm_dev, &exynos_dsi_display);
> - if (ret) {
> - DRM_ERROR("Encoder create [%d] failed with %d\n",
> - exynos_dsi_display.type, ret);
> - return ret;
> - }
> -
> - dsi = exynos_dsi_display.ctx;
> -
> - return mipi_dsi_host_register(&dsi->dsi_host);
> + return exynos_drm_create_enc_conn(drm_dev, &exynos_dsi_display);
> }
>
> static void exynos_dsi_unbind(struct device *dev, struct device *master,
> @@ -1406,8 +1392,6 @@ static void exynos_dsi_unbind(struct device *dev,
> struct device *master,
>
> exynos_dsi_dpms(&exynos_dsi_display, DRM_MODE_DPMS_OFF);
>
> - mipi_dsi_host_unregister(&dsi->dsi_host);
> -
> encoder->funcs->destroy(encoder);
> drm_connector_cleanup(&dsi->connector);
> }
> @@ -1502,6 +1486,18 @@ static int exynos_dsi_probe(struct platform_device
> *pdev)
>
> platform_set_drvdata(pdev, &exynos_dsi_display);
>
> + ret = mipi_dsi_host_register(&dsi->dsi_host);
> + if (ret)
> + goto err_del_component;
> +
> + dsi->panel = of_drm_find_panel(dsi->panel_node);
> + if (!dsi->panel) {
> + mipi_dsi_host_unregister(&dsi->dsi_host);
> + return -EPROBE_DEFER;
> + }
> +
> + drm_panel_attach(dsi->panel, &dsi->connector);
> +
> ret = component_add(&pdev->dev, &exynos_dsi_component_ops);
> if (ret)
> goto err_del_component;
> @@ -1515,6 +1511,10 @@ err_del_component:
>
> static int exynos_dsi_remove(struct platform_device *pdev)
> {
> + struct exynos_dsi *dsi = exynos_dsi_display.ctx;
> +
> + mipi_dsi_host_unregister(&dsi->dsi_host);
> +
> component_del(&pdev->dev, &exynos_dsi_component_ops);
> exynos_drm_component_del(&pdev->dev);
>
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