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drm/rcar-du: Add OF support 

Implement support for the R-Car DU DT bindings in the rcar-du DRM
driver.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2014-01-21 15:57:26 +01:00
parent 1d46fea7d0
commit 96c0269118
7 changed files with 344 additions and 106 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

170
drivers/gpu/drm/rcar-du/rcar_du_drv.c
View File

@ -15,6 +15,7 @@
#include <linux/io.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/slab.h>
@ -29,6 +30,97 @@
#include "rcar_du_kms.h"
#include "rcar_du_regs.h"
/* -----------------------------------------------------------------------------
* Device Information
*/
static const struct rcar_du_device_info rcar_du_r8a7779_info = {
.features = 0,
.num_crtcs = 2,
.routes = {
/* R8A7779 has two RGB outputs and one (currently unsupported)
* TCON output.
*/
[RCAR_DU_OUTPUT_DPAD0] = {
.possible_crtcs = BIT(0),
.encoder_type = DRM_MODE_ENCODER_NONE,
.port = 0,
},
[RCAR_DU_OUTPUT_DPAD1] = {
.possible_crtcs = BIT(1) | BIT(0),
.encoder_type = DRM_MODE_ENCODER_NONE,
.port = 1,
},
},
.num_lvds = 0,
};
static const struct rcar_du_device_info rcar_du_r8a7790_info = {
.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8,
.quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
.num_crtcs = 3,
.routes = {
/* R8A7790 has one RGB output, two LVDS outputs and one
* (currently unsupported) TCON output.
*/
[RCAR_DU_OUTPUT_DPAD0] = {
.possible_crtcs = BIT(2) | BIT(1) | BIT(0),
.encoder_type = DRM_MODE_ENCODER_NONE,
.port = 0,
},
[RCAR_DU_OUTPUT_LVDS0] = {
.possible_crtcs = BIT(0),
.encoder_type = DRM_MODE_ENCODER_LVDS,
.port = 1,
},
[RCAR_DU_OUTPUT_LVDS1] = {
.possible_crtcs = BIT(2) | BIT(1),
.encoder_type = DRM_MODE_ENCODER_LVDS,
.port = 2,
},
},
.num_lvds = 2,
};
static const struct rcar_du_device_info rcar_du_r8a7791_info = {
.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8,
.num_crtcs = 2,
.routes = {
/* R8A7791 has one RGB output, one LVDS output and one
* (currently unsupported) TCON output.
*/
[RCAR_DU_OUTPUT_DPAD0] = {
.possible_crtcs = BIT(1),
.encoder_type = DRM_MODE_ENCODER_NONE,
.port = 0,
},
[RCAR_DU_OUTPUT_LVDS0] = {
.possible_crtcs = BIT(0),
.encoder_type = DRM_MODE_ENCODER_LVDS,
.port = 1,
},
},
.num_lvds = 1,
};
static const struct platform_device_id rcar_du_id_table[] = {
{ "rcar-du-r8a7779", (kernel_ulong_t)&rcar_du_r8a7779_info },
{ "rcar-du-r8a7790", (kernel_ulong_t)&rcar_du_r8a7790_info },
{ "rcar-du-r8a7791", (kernel_ulong_t)&rcar_du_r8a7791_info },
{ }
};
MODULE_DEVICE_TABLE(platform, rcar_du_id_table);
static const struct of_device_id rcar_du_of_table[] = {
{ .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info },
{ .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info },
{ .compatible = "renesas,du-r8a7791", .data = &rcar_du_r8a7791_info },
{ }
};
MODULE_DEVICE_TABLE(of, rcar_du_of_table);
/* -----------------------------------------------------------------------------
* DRM operations
*/
@ -53,12 +145,13 @@ static int rcar_du_unload(struct drm_device *dev)
static int rcar_du_load(struct drm_device *dev, unsigned long flags)
{
struct platform_device *pdev = dev->platformdev;
struct device_node *np = pdev->dev.of_node;
struct rcar_du_platform_data *pdata = pdev->dev.platform_data;
struct rcar_du_device *rcdu;
struct resource *mem;
int ret;
if (pdata == NULL) {
if (pdata == NULL && np == NULL) {
dev_err(dev->dev, "no platform data\n");
return -ENODEV;
}
@ -71,7 +164,8 @@ static int rcar_du_load(struct drm_device *dev, unsigned long flags)
rcdu->dev = &pdev->dev;
rcdu->pdata = pdata;
rcdu->info = (struct rcar_du_device_info *)pdev->id_entry->driver_data;
rcdu->info = np ? of_match_device(rcar_du_of_table, rcdu->dev)->data
: (void *)platform_get_device_id(pdev)->driver_data;
rcdu->ddev = dev;
dev->dev_private = rcdu;
@ -232,77 +326,6 @@ static int rcar_du_remove(struct platform_device *pdev)
return 0;
}
static const struct rcar_du_device_info rcar_du_r8a7779_info = {
.features = 0,
.num_crtcs = 2,
.routes = {
/* R8A7779 has two RGB outputs and one (currently unsupported)
* TCON output.
*/
[RCAR_DU_OUTPUT_DPAD0] = {
.possible_crtcs = BIT(0),
.encoder_type = DRM_MODE_ENCODER_NONE,
},
[RCAR_DU_OUTPUT_DPAD1] = {
.possible_crtcs = BIT(1) | BIT(0),
.encoder_type = DRM_MODE_ENCODER_NONE,
},
},
.num_lvds = 0,
};
static const struct rcar_du_device_info rcar_du_r8a7790_info = {
.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8,
.quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
.num_crtcs = 3,
.routes = {
/* R8A7790 has one RGB output, two LVDS outputs and one
* (currently unsupported) TCON output.
*/
[RCAR_DU_OUTPUT_DPAD0] = {
.possible_crtcs = BIT(2) | BIT(1) | BIT(0),
.encoder_type = DRM_MODE_ENCODER_NONE,
},
[RCAR_DU_OUTPUT_LVDS0] = {
.possible_crtcs = BIT(0),
.encoder_type = DRM_MODE_ENCODER_LVDS,
},
[RCAR_DU_OUTPUT_LVDS1] = {
.possible_crtcs = BIT(2) | BIT(1),
.encoder_type = DRM_MODE_ENCODER_LVDS,
},
},
.num_lvds = 2,
};
static const struct rcar_du_device_info rcar_du_r8a7791_info = {
.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8,
.num_crtcs = 2,
.routes = {
/* R8A7791 has one RGB output, one LVDS output and one
* (currently unsupported) TCON output.
*/
[RCAR_DU_OUTPUT_DPAD0] = {
.possible_crtcs = BIT(1),
.encoder_type = DRM_MODE_ENCODER_NONE,
},
[RCAR_DU_OUTPUT_LVDS0] = {
.possible_crtcs = BIT(0),
.encoder_type = DRM_MODE_ENCODER_LVDS,
},
},
.num_lvds = 1,
};
static const struct platform_device_id rcar_du_id_table[] = {
{ "rcar-du-r8a7779", (kernel_ulong_t)&rcar_du_r8a7779_info },
{ "rcar-du-r8a7790", (kernel_ulong_t)&rcar_du_r8a7790_info },
{ "rcar-du-r8a7791", (kernel_ulong_t)&rcar_du_r8a7791_info },
{ }
};
MODULE_DEVICE_TABLE(platform, rcar_du_id_table);
static struct platform_driver rcar_du_platform_driver = {
.probe = rcar_du_probe,
.remove = rcar_du_remove,
@ -310,6 +333,7 @@ static struct platform_driver rcar_du_platform_driver = {
.owner = THIS_MODULE,
.name = "rcar-du",
.pm = &rcar_du_pm_ops,
.of_match_table = rcar_du_of_table,
},
.id_table = rcar_du_id_table,
};

2
drivers/gpu/drm/rcar-du/rcar_du_drv.h
View File

@ -37,6 +37,7 @@ struct rcar_du_lvdsenc;
* struct rcar_du_output_routing - Output routing specification
* @possible_crtcs: bitmask of possible CRTCs for the output
* @encoder_type: DRM type of the internal encoder associated with the output
* @port: device tree port number corresponding to this output route
*
* The DU has 5 possible outputs (DPAD0/1, LVDS0/1, TCON). Output routing data
* specify the valid SoC outputs, which CRTCs can drive the output, and the type
@ -45,6 +46,7 @@ struct rcar_du_lvdsenc;
struct rcar_du_output_routing {
unsigned int possible_crtcs;
unsigned int encoder_type;
unsigned int port;
};
/*

11
drivers/gpu/drm/rcar-du/rcar_du_encoder.c
View File

@ -142,7 +142,8 @@ static const struct drm_encoder_funcs encoder_funcs = {
int rcar_du_encoder_init(struct rcar_du_device *rcdu,
enum rcar_du_encoder_type type,
enum rcar_du_output output,
const struct rcar_du_encoder_data *data)
const struct rcar_du_encoder_data *data,
struct device_node *np)
{
struct rcar_du_encoder *renc;
unsigned int encoder_type;
@ -189,9 +190,11 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu,
drm_encoder_helper_add(&renc->encoder, &encoder_helper_funcs);
switch (encoder_type) {
case DRM_MODE_ENCODER_LVDS:
return rcar_du_lvds_connector_init(rcdu, renc,
&data->connector.lvds.panel);
case DRM_MODE_ENCODER_LVDS: {
const struct rcar_du_panel_data *pdata =
data ? &data->connector.lvds.panel : NULL;
return rcar_du_lvds_connector_init(rcdu, renc, pdata, np);
}
case DRM_MODE_ENCODER_DAC:
return rcar_du_vga_connector_init(rcdu, renc);

3
drivers/gpu/drm/rcar-du/rcar_du_encoder.h
View File

@ -44,6 +44,7 @@ rcar_du_connector_best_encoder(struct drm_connector *connector);
int rcar_du_encoder_init(struct rcar_du_device *rcdu,
enum rcar_du_encoder_type type,
enum rcar_du_output output,
const struct rcar_du_encoder_data *data);
const struct rcar_du_encoder_data *data,
struct device_node *np);
#endif /* __RCAR_DU_ENCODER_H__ */

231
drivers/gpu/drm/rcar-du/rcar_du_kms.c
View File

@ -17,6 +17,8 @@
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <linux/of_graph.h>
#include "rcar_du_crtc.h"
#include "rcar_du_drv.h"
#include "rcar_du_encoder.h"
@ -188,6 +190,205 @@ static const struct drm_mode_config_funcs rcar_du_mode_config_funcs = {
.output_poll_changed = rcar_du_output_poll_changed,
};
static int rcar_du_encoders_init_pdata(struct rcar_du_device *rcdu)
{
unsigned int num_encoders = 0;
unsigned int i;
int ret;
for (i = 0; i < rcdu->pdata->num_encoders; ++i) {
const struct rcar_du_encoder_data *pdata =
&rcdu->pdata->encoders[i];
const struct rcar_du_output_routing *route =
&rcdu->info->routes[pdata->output];
if (pdata->type == RCAR_DU_ENCODER_UNUSED)
continue;
if (pdata->output >= RCAR_DU_OUTPUT_MAX ||
route->possible_crtcs == 0) {
dev_warn(rcdu->dev,
"encoder %u references unexisting output %u, skipping\n",
i, pdata->output);
continue;
}
ret = rcar_du_encoder_init(rcdu, pdata->type, pdata->output,
pdata, NULL);
if (ret < 0)
return ret;
num_encoders++;
}
return num_encoders;
}
static int rcar_du_encoders_init_dt_one(struct rcar_du_device *rcdu,
enum rcar_du_output output,
struct of_endpoint *ep)
{
static const struct {
const char *compatible;
enum rcar_du_encoder_type type;
} encoders[] = {
{ "adi,adv7123", RCAR_DU_ENCODER_VGA },
{ "thine,thc63lvdm83d", RCAR_DU_ENCODER_LVDS },
};
enum rcar_du_encoder_type enc_type = RCAR_DU_ENCODER_NONE;
struct device_node *connector = NULL;
struct device_node *encoder = NULL;
struct device_node *prev = NULL;
struct device_node *entity_ep_node;
struct device_node *entity;
int ret;
/*
* Locate the connected entity and infer its type from the number of
* endpoints.
*/
entity = of_graph_get_remote_port_parent(ep->local_node);
if (!entity) {
dev_dbg(rcdu->dev, "unconnected endpoint %s, skipping\n",
ep->local_node->full_name);
return 0;
}
entity_ep_node = of_parse_phandle(ep->local_node, "remote-endpoint", 0);
while (1) {
struct device_node *ep_node;
ep_node = of_graph_get_next_endpoint(entity, prev);
of_node_put(prev);
prev = ep_node;
if (!ep_node)
break;
if (ep_node == entity_ep_node)
continue;
/*
* We've found one endpoint other than the input, this must
* be an encoder. Locate the connector.
*/
encoder = entity;
connector = of_graph_get_remote_port_parent(ep_node);
of_node_put(ep_node);
if (!connector) {
dev_warn(rcdu->dev,
"no connector for encoder %s, skipping\n",
encoder->full_name);
of_node_put(entity_ep_node);
of_node_put(encoder);
return 0;
}
break;
}
of_node_put(entity_ep_node);
if (encoder) {
/*
* If an encoder has been found, get its type based on its
* compatible string.
*/
unsigned int i;
for (i = 0; i < ARRAY_SIZE(encoders); ++i) {
if (of_device_is_compatible(encoder,
encoders[i].compatible)) {
enc_type = encoders[i].type;
break;
}
}
if (i == ARRAY_SIZE(encoders)) {
dev_warn(rcdu->dev,
"unknown encoder type for %s, skipping\n",
encoder->full_name);
of_node_put(encoder);
of_node_put(connector);
return 0;
}
} else {
/*
* If no encoder has been found the entity must be the
* connector.
*/
connector = entity;
}
ret = rcar_du_encoder_init(rcdu, enc_type, output, NULL, connector);
of_node_put(encoder);
of_node_put(connector);
return ret < 0 ? ret : 1;
}
static int rcar_du_encoders_init_dt(struct rcar_du_device *rcdu)
{
struct device_node *np = rcdu->dev->of_node;
struct device_node *prev = NULL;
unsigned int num_encoders = 0;
/*
* Iterate over the endpoints and create one encoder for each output
* pipeline.
*/
while (1) {
struct device_node *ep_node;
enum rcar_du_output output;
struct of_endpoint ep;
unsigned int i;
int ret;
ep_node = of_graph_get_next_endpoint(np, prev);
of_node_put(prev);
prev = ep_node;
if (ep_node == NULL)
break;
ret = of_graph_parse_endpoint(ep_node, &ep);
if (ret < 0) {
of_node_put(ep_node);
return ret;
}
/* Find the output route corresponding to the port number. */
for (i = 0; i < RCAR_DU_OUTPUT_MAX; ++i) {
if (rcdu->info->routes[i].possible_crtcs &&
rcdu->info->routes[i].port == ep.port) {
output = i;
break;
}
}
if (i == RCAR_DU_OUTPUT_MAX) {
dev_warn(rcdu->dev,
"port %u references unexisting output, skipping\n",
ep.port);
continue;
}
/* Process the output pipeline. */
ret = rcar_du_encoders_init_dt_one(rcdu, output, &ep);
if (ret < 0) {
of_node_put(ep_node);
return ret;
}
num_encoders += ret;
}
return num_encoders;
}
int rcar_du_modeset_init(struct rcar_du_device *rcdu)
{
static const unsigned int mmio_offsets[] = {
@ -197,6 +398,7 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
struct drm_device *dev = rcdu->ddev;
struct drm_encoder *encoder;
struct drm_fbdev_cma *fbdev;
unsigned int num_encoders;
unsigned int num_groups;
unsigned int i;
int ret;
@ -240,28 +442,15 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
if (ret < 0)
return ret;
for (i = 0; i < rcdu->pdata->num_encoders; ++i) {
const struct rcar_du_encoder_data *pdata =
&rcdu->pdata->encoders[i];
const struct rcar_du_output_routing *route =
&rcdu->info->routes[pdata->output];
if (rcdu->pdata)
ret = rcar_du_encoders_init_pdata(rcdu);
else
ret = rcar_du_encoders_init_dt(rcdu);
if (pdata->type == RCAR_DU_ENCODER_UNUSED)
continue;
if (ret < 0)
return ret;
if (pdata->output >= RCAR_DU_OUTPUT_MAX ||
route->possible_crtcs == 0) {
dev_warn(rcdu->dev,
"encoder %u references unexisting output %u, skipping\n",
i, pdata->output);
continue;
}
ret = rcar_du_encoder_init(rcdu, pdata->type, pdata->output,
pdata);
if (ret < 0)
return ret;
}
num_encoders = ret;
/* Set the possible CRTCs and possible clones. There's always at least
* one way for all encoders to clone each other, set all bits in the
@ -273,7 +462,7 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
&rcdu->info->routes[renc->output];
encoder->possible_crtcs = route->possible_crtcs;
encoder->possible_clones = (1 << rcdu->pdata->num_encoders) - 1;
encoder->possible_clones = (1 << num_encoders) - 1;
}
/* Now that the CRTCs have been initialized register the planes. */

30
drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c
View File

@ -15,6 +15,10 @@
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <video/display_timing.h>
#include <video/of_display_timing.h>
#include <video/videomode.h>
#include "rcar_du_drv.h"
#include "rcar_du_encoder.h"
#include "rcar_du_kms.h"
@ -23,7 +27,7 @@
struct rcar_du_lvds_connector {
struct rcar_du_connector connector;
const struct rcar_du_panel_data *panel;
struct rcar_du_panel_data panel;
};
#define to_rcar_lvds_connector(c) \
@ -41,7 +45,7 @@ static int rcar_du_lvds_connector_get_modes(struct drm_connector *connector)
mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
drm_display_mode_from_videomode(&lvdscon->panel->mode, mode);
drm_display_mode_from_videomode(&lvdscon->panel.mode, mode);
drm_mode_probed_add(connector, mode);
@ -74,7 +78,8 @@ static const struct drm_connector_funcs connector_funcs = {
int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
struct rcar_du_encoder *renc,
const struct rcar_du_panel_data *panel)
const struct rcar_du_panel_data *panel,
/* TODO const */ struct device_node *np)
{
struct rcar_du_lvds_connector *lvdscon;
struct drm_connector *connector;
@ -84,11 +89,24 @@ int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
if (lvdscon == NULL)
return -ENOMEM;
lvdscon->panel = panel;
if (panel) {
lvdscon->panel = *panel;
} else {
struct display_timing timing;
ret = of_get_display_timing(np, "panel-timing", &timing);
if (ret < 0)
return ret;
videomode_from_timing(&timing, &lvdscon->panel.mode);
of_property_read_u32(np, "width-mm", &lvdscon->panel.width_mm);
of_property_read_u32(np, "height-mm", &lvdscon->panel.height_mm);
}
connector = &lvdscon->connector.connector;
connector->display_info.width_mm = panel->width_mm;
connector->display_info.height_mm = panel->height_mm;
connector->display_info.width_mm = lvdscon->panel.width_mm;
connector->display_info.height_mm = lvdscon->panel.height_mm;
ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
DRM_MODE_CONNECTOR_LVDS);

3
drivers/gpu/drm/rcar-du/rcar_du_lvdscon.h
View File

@ -20,6 +20,7 @@ struct rcar_du_panel_data;
int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
struct rcar_du_encoder *renc,
const struct rcar_du_panel_data *panel);
const struct rcar_du_panel_data *panel,
struct device_node *np);
#endif /* __RCAR_DU_LVDSCON_H__ */