Use the imx_legacy bridge driver instead of handlign display modes via
the connector node.
All existing usecases already support attaching using
the DRM_BRIDGE_ATTACH_NO_CONNECTOR flag, while the imx_legacy bridge
doesn't support creating connector at all. Switch to
drm_bridge_connector at the same time.
Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
---
drivers/gpu/drm/imx/ipuv3/Kconfig | 1 +
drivers/gpu/drm/imx/ipuv3/imx-ldb.c | 103 ++++++++++--------------------------
2 files changed, 30 insertions(+), 74 deletions(-)
diff --git a/drivers/gpu/drm/imx/ipuv3/Kconfig
b/drivers/gpu/drm/imx/ipuv3/Kconfig
index 8aaf2441bcef..3e5c0f4a1d0d 100644
--- a/drivers/gpu/drm/imx/ipuv3/Kconfig
+++ b/drivers/gpu/drm/imx/ipuv3/Kconfig
@@ -33,6 +33,7 @@ config DRM_IMX_LDB
depends on DRM_BRIDGE
select DRM_PANEL
select DRM_PANEL_BRIDGE
+ select DRM_IMX_LEGACY_BRIDGE
help
Choose this to enable the internal LVDS Display Bridge (LDB)
found on i.MX53 and i.MX6 processors.
diff --git a/drivers/gpu/drm/imx/ipuv3/imx-ldb.c
b/drivers/gpu/drm/imx/ipuv3/imx-ldb.c
index 74b41a507219..10e608f0b040 100644
--- a/drivers/gpu/drm/imx/ipuv3/imx-ldb.c
+++ b/drivers/gpu/drm/imx/ipuv3/imx-ldb.c
@@ -19,18 +19,17 @@
#include <linux/regmap.h>
#include <linux/videodev2.h>
-#include <video/of_display_timing.h>
-#include <video/of_videomode.h>
-
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
+#include <drm/drm_bridge_connector.h>
#include <drm/drm_edid.h>
#include <drm/drm_managed.h>
#include <drm/drm_of.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
+#include <drm/bridge/imx.h>
#include "imx-drm.h"
@@ -54,7 +53,6 @@
struct imx_ldb_channel;
struct imx_ldb_encoder {
- struct drm_connector connector;
struct drm_encoder encoder;
struct imx_ldb_channel *channel;
};
@@ -68,17 +66,9 @@ struct imx_ldb_channel {
struct device_node *child;
int chno;
- struct drm_display_mode mode;
- int mode_valid;
u32 bus_format;
- u32 bus_flags;
};
-static inline struct imx_ldb_channel *con_to_imx_ldb_ch(struct drm_connector
*c)
-{
- return container_of(c, struct imx_ldb_encoder, connector)->channel;
-}
-
static inline struct imx_ldb_channel *enc_to_imx_ldb_ch(struct drm_encoder *e)
{
return container_of(e, struct imx_ldb_encoder, encoder)->channel;
@@ -128,25 +118,6 @@ static void imx_ldb_ch_set_bus_format(struct
imx_ldb_channel *imx_ldb_ch,
}
}
-static int imx_ldb_connector_get_modes(struct drm_connector *connector)
-{
- struct imx_ldb_channel *imx_ldb_ch = con_to_imx_ldb_ch(connector);
- int num_modes;
-
- if (imx_ldb_ch->mode_valid) {
- struct drm_display_mode *mode;
-
- mode = drm_mode_duplicate(connector->dev, &imx_ldb_ch->mode);
- if (!mode)
- return -EINVAL;
- mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
- drm_mode_probed_add(connector, mode);
- num_modes++;
- }
-
- return num_modes;
-}
-
static void imx_ldb_set_clock(struct imx_ldb *ldb, int mux, int chno,
unsigned long serial_clk, unsigned long di_clk)
{
@@ -348,11 +319,12 @@ static int imx_ldb_encoder_atomic_check(struct
drm_encoder *encoder,
/* Bus format description in DT overrides connector display info. */
if (!bus_format && di->num_bus_formats) {
bus_format = di->bus_formats[0];
- imx_crtc_state->bus_flags = di->bus_flags;
} else {
bus_format = imx_ldb_ch->bus_format;
- imx_crtc_state->bus_flags = imx_ldb_ch->bus_flags;
}
+
+ imx_crtc_state->bus_flags = di->bus_flags;
+
switch (bus_format) {
case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
imx_crtc_state->bus_format = MEDIA_BUS_FMT_RGB666_1X18;
@@ -372,18 +344,6 @@ static int imx_ldb_encoder_atomic_check(struct drm_encoder
*encoder,
}
-static const struct drm_connector_funcs imx_ldb_connector_funcs = {
- .fill_modes = drm_helper_probe_single_connector_modes,
- .destroy = imx_drm_connector_destroy,
- .reset = drm_atomic_helper_connector_reset,
- .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
- .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
-};
-
-static const struct drm_connector_helper_funcs imx_ldb_connector_helper_funcs
= {
- .get_modes = imx_ldb_connector_get_modes,
-};
-
static const struct drm_encoder_helper_funcs imx_ldb_encoder_helper_funcs = {
.atomic_mode_set = imx_ldb_encoder_atomic_mode_set,
.enable = imx_ldb_encoder_enable,
@@ -421,7 +381,6 @@ static int imx_ldb_register(struct drm_device *drm,
return PTR_ERR(ldb_encoder);
ldb_encoder->channel = imx_ldb_ch;
- connector = &ldb_encoder->connector;
encoder = &ldb_encoder->encoder;
ret = imx_drm_encoder_parse_of(drm, encoder, imx_ldb_ch->child);
@@ -440,24 +399,16 @@ static int imx_ldb_register(struct drm_device *drm,
drm_encoder_helper_add(encoder, &imx_ldb_encoder_helper_funcs);
- if (imx_ldb_ch->bridge) {
- ret = drm_bridge_attach(encoder, imx_ldb_ch->bridge, NULL, 0);
- if (ret)
- return ret;
- } else {
- /*
- * We want to add the connector whenever there is no bridge
- * that brings its own, not only when there is a panel. For
- * historical reasons, the ldb driver can also work without
- * a panel.
- */
- drm_connector_helper_add(connector,
- &imx_ldb_connector_helper_funcs);
- drm_connector_init(drm, connector,
- &imx_ldb_connector_funcs,
- DRM_MODE_CONNECTOR_LVDS);
- drm_connector_attach_encoder(connector, encoder);
- }
+ ret = drm_bridge_attach(encoder, imx_ldb_ch->bridge, NULL,
+ DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+ if (ret)
+ return ret;
+
+ connector = drm_bridge_connector_init(drm, encoder);
+ if (IS_ERR(connector))
+ return PTR_ERR(connector);
+
+ drm_connector_attach_encoder(connector, encoder);
return 0;
}
@@ -632,17 +583,7 @@ static int imx_ldb_probe(struct platform_device *pdev)
ret = PTR_ERR(channel->bridge);
if (ret != -ENODEV)
goto free_child;
-
channel->bridge = NULL;
-
- ret = of_get_drm_display_mode(child,
- &channel->mode,
- &channel->bus_flags,
- OF_USE_NATIVE_MODE);
- if (ret)
- goto free_child;
-
- channel->mode_valid = 1;
}
bus_format = of_get_bus_format(dev, child);
@@ -659,6 +600,20 @@ static int imx_ldb_probe(struct platform_device *pdev)
goto free_child;
}
channel->bus_format = bus_format;
+
+ /*
+ * legacy bridge doesn't handle bus_format, so create it after
+ * checking the bus_format property.
+ */
+ if (!channel->bridge) {
+ channel->bridge = devm_imx_drm_legacy_bridge(dev, child,
+
DRM_MODE_CONNECTOR_LVDS);
+ if (IS_ERR(channel->bridge)) {
+ ret = PTR_ERR(channel->bridge);
+ goto free_child;
+ }
+ }
+
channel->child = child;
}
--
2.39.2
