diff options
| author |   Boris Brezillon <boris.brezillon@bootlin.com> | 2018-05-09 15:00:39 +0200 |
|---|---|---|
| committer |   Thierry Reding <treding@nvidia.com> | 2018-07-10 17:59:05 +0200 |
| commit | 5fa8e4a22182df8ea39adeba4bd518506e26a96d (patch) | |
| tree | 4b9a3df577632f7c2165ea86d4d98f2cb5018266 /drivers/gpu/drm/exynos/exynos_drm_dsi.c | |
| parent | drm/panel: simple: Add DLC DLC0700YZG-1 panel (diff) | |
| download | linux-dev-5fa8e4a22182df8ea39adeba4bd518506e26a96d.tar.xz linux-dev-5fa8e4a22182df8ea39adeba4bd518506e26a96d.zip | |
drm/panel: Make of_drm_find_panel() return an ERR_PTR() instead of NULL
Right now, the DRM panel logic returns NULL when a panel pointing to
the passed OF node is not present in the list of registered panels.
Most drivers interpret this NULL value as -EPROBE_DEFER, but we are
about to modify the semantic of of_drm_find_panel() and let the
framework return -ENODEV when the device node we're pointing to has
a status property that is not equal to "okay" or "ok".
Let's first patch the of_drm_find_panel() implementation to return
ERR_PTR(-EPROBE_DEFER) instead of NULL and patch all callers to replace
the '!panel' check by an 'IS_ERR(panel)' one.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180509130042.9435-2-boris.brezillon@bootlin.com
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_dsi.c')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_dsi.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c index 6d29777884f9..809e1e0447df 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c @@ -1519,6 +1519,9 @@ static int exynos_dsi_host_attach(struct mipi_dsi_host *host, dsi->format = device->format; dsi->mode_flags = device->mode_flags; dsi->panel = of_drm_find_panel(device->dev.of_node); + if (IS_ERR(dsi->panel)) + dsi->panel = NULL; + if (dsi->panel) { drm_panel_attach(dsi->panel, &dsi->connector); dsi->connector.status = connector_status_connected; |