diff options
| author | Dmitry Osipenko <digetx@gmail.com> | 2020-08-14 01:06:54 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2020-09-17 12:30:11 +0200 |
| commit | f00b9dd579d0078123e33434c25f37d42747574d (patch) | |
| tree | 08b3155e4c16dcaecee97f78d3e66dedb4da1ab6 | |
| parent | 3d2e7aec70130af53289eccd41696c15ce2c3e89 (diff) | |
drm/tegra: output: Support DRM bridges
Newer Tegra device-trees will specify a video output graph which involves
a bridge. This patch adds initial support for the DRM bridges to the Tegra
DRM output.
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
| -rw-r--r-- | drivers/gpu/drm/tegra/drm.h | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/tegra/output.c | 12 |
2 files changed, 14 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/drm.h b/drivers/gpu/drm/tegra/drm.h index b25443255be6..f38de08e0c95 100644 --- a/drivers/gpu/drm/tegra/drm.h +++ b/drivers/gpu/drm/tegra/drm.h @@ -12,6 +12,7 @@ #include <linux/gpio/consumer.h> #include <drm/drm_atomic.h> +#include <drm/drm_bridge.h> #include <drm/drm_edid.h> #include <drm/drm_encoder.h> #include <drm/drm_fb_helper.h> @@ -116,6 +117,7 @@ struct tegra_output { struct device_node *of_node; struct device *dev; + struct drm_bridge *bridge; struct drm_panel *panel; struct i2c_adapter *ddc; const struct edid *edid; diff --git a/drivers/gpu/drm/tegra/output.c b/drivers/gpu/drm/tegra/output.c index f050c8bac398..925a9199a710 100644 --- a/drivers/gpu/drm/tegra/output.c +++ b/drivers/gpu/drm/tegra/output.c @@ -5,6 +5,7 @@ */ #include <drm/drm_atomic_helper.h> +#include <drm/drm_of.h> #include <drm/drm_panel.h> #include <drm/drm_simple_kms_helper.h> @@ -99,8 +100,19 @@ int tegra_output_probe(struct tegra_output *output) if (!output->of_node) output->of_node = output->dev->of_node; + err = drm_of_find_panel_or_bridge(output->of_node, -1, -1, + &output->panel, &output->bridge); + if (err && err != -ENODEV) + return err; + panel = of_parse_phandle(output->of_node, "nvidia,panel", 0); if (panel) { + /* + * Don't mix nvidia,panel phandle with the graph in a + * device-tree. + */ + WARN_ON(output->panel || output->bridge); + output->panel = of_drm_find_panel(panel); of_node_put(panel); |