Use the DRM panel framework to attach a panel to an output.
Signed-off-by: Thierry Reding <tred...@nvidia.com>
---
drivers/gpu/host1x/drm/Kconfig | 1 +
drivers/gpu/host1x/drm/drm.h | 1 +
drivers/gpu/host1x/drm/output.c | 28 ++++++++++++++++++++++++++--
3 files changed, 28 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/host1x/drm/Kconfig b/drivers/gpu/host1x/drm/Kconfig
index 69853a4..01b036d 100644
--- a/drivers/gpu/host1x/drm/Kconfig
+++ b/drivers/gpu/host1x/drm/Kconfig
@@ -2,6 +2,7 @@ config DRM_TEGRA
bool "NVIDIA Tegra DRM"
depends on DRM
select DRM_KMS_HELPER
+ select DRM_PANEL
select FB_SYS_FILLRECT
select FB_SYS_COPYAREA
select FB_SYS_IMAGEBLIT
diff --git a/drivers/gpu/host1x/drm/drm.h b/drivers/gpu/host1x/drm/drm.h
index 02ce020..a30276c 100644
--- a/drivers/gpu/host1x/drm/drm.h
+++ b/drivers/gpu/host1x/drm/drm.h
@@ -195,6 +195,7 @@ struct tegra_output {
const struct tegra_output_ops *ops;
enum tegra_output_type type;
+ struct drm_panel *panel;
struct i2c_adapter *ddc;
const struct edid *edid;
unsigned int hpd_irq;
diff --git a/drivers/gpu/host1x/drm/output.c b/drivers/gpu/host1x/drm/output.c
index 137ae81..2ce03c1 100644
--- a/drivers/gpu/host1x/drm/output.c
+++ b/drivers/gpu/host1x/drm/output.c
@@ -11,6 +11,7 @@
#include <linux/of_gpio.h>
#include <linux/i2c.h>
+#include <drm/drm_panel.h>
#include "drm.h"
static int tegra_connector_get_modes(struct drm_connector *connector)
@@ -19,6 +20,9 @@ static int tegra_connector_get_modes(struct drm_connector
*connector)
struct edid *edid = NULL;
int err = 0;
+ if (output->panel)
+ return output->panel->funcs->get_modes(output->panel);
+
if (output->edid)
edid = kmemdup(output->edid, sizeof(*edid), GFP_KERNEL);
else if (output->ddc)
@@ -74,6 +78,9 @@ tegra_connector_detect(struct drm_connector *connector, bool
force)
else
status = connector_status_connected;
} else {
+ if (output->panel)
+ status = connector_status_connected;
+
if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
status = connector_status_connected;
}
@@ -105,6 +112,11 @@ static const struct drm_encoder_funcs encoder_funcs = {
static void tegra_encoder_dpms(struct drm_encoder *encoder, int mode)
{
+ struct tegra_output *output = encoder_to_output(encoder);
+ struct drm_panel *panel = output->panel;
+
+ if (panel && panel->funcs && panel->funcs->dpms)
+ panel->funcs->dpms(panel, mode);
}
static bool tegra_encoder_mode_fixup(struct drm_encoder *encoder,
@@ -153,14 +165,23 @@ static irqreturn_t hpd_irq(int irq, void *data)
int tegra_output_parse_dt(struct tegra_output *output)
{
+ struct device_node *ddc, *panel;
enum of_gpio_flags flags;
- struct device_node *ddc;
size_t size;
int err;
if (!output->of_node)
output->of_node = output->dev->of_node;
+ panel = of_parse_phandle(output->of_node, "nvidia,panel", 0);
+ if (panel) {
+ output->panel = of_drm_find_panel(panel);
+ if (!output->panel)
+ return -EPROBE_DEFER;
+
+ of_node_put(panel);
+ }
+
output->edid = of_get_property(output->of_node, "nvidia,edid", &size);
ddc = of_parse_phandle(output->of_node, "nvidia,ddc-i2c-bus", 0);
@@ -175,7 +196,7 @@ int tegra_output_parse_dt(struct tegra_output *output)
of_node_put(ddc);
}
- if (!output->edid && !output->ddc)
+ if (!output->panel && !output->edid && !output->ddc)
return -ENODEV;
output->hpd_gpio = of_get_named_gpio_flags(output->of_node,
@@ -242,6 +263,9 @@ int tegra_output_init(struct drm_device *drm, struct
tegra_output *output)
connector);
drm_connector_helper_add(&output->connector, &connector_helper_funcs);
+ if (output->panel)
+ drm_panel_attach(output->panel, &output->connector);
+
drm_encoder_init(drm, &output->encoder, &encoder_funcs, encoder);
drm_encoder_helper_add(&output->encoder, &encoder_helper_funcs);
--
1.8.4
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