lkml.org 
[lkml]   [2020]   [May]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH v5 4/6] drm/tegra: output: Support DRM bridges
    On Sat, Apr 18, 2020 at 08:07:01PM +0300, Dmitry Osipenko wrote:
    > 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.
    >
    > Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
    Acked-by: Sam Ravnborg <sam@ravnborg.org>
    > ---
    > drivers/gpu/drm/tegra/drm.h | 2 ++
    > drivers/gpu/drm/tegra/output.c | 12 ++++++++++++
    > 2 files changed, 14 insertions(+)
    >
    > diff --git a/drivers/gpu/drm/tegra/drm.h b/drivers/gpu/drm/tegra/drm.h
    > index 804869799305..cccd368b6752 100644
    > --- a/drivers/gpu/drm/tegra/drm.h
    > +++ b/drivers/gpu/drm/tegra/drm.h
    > @@ -12,6 +12,7 @@
    > #include <linux/of_gpio.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 a6a711d54e88..ccd1421f1b24 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);
    >
    > --
    > 2.26.0
    >
    > _______________________________________________
    > dri-devel mailing list
    > dri-devel@lists.freedesktop.org
    > https://lists.freedesktop.org/mailman/listinfo/dri-devel

    \
     
     \ /
      Last update: 2020-05-06 18:43    [W:4.098 / U:0.020 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site