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drm/rcar-du: Rework output routing support

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Split the output routing specification between SoC-internal data,
specified in the rcar_du_device_info structure, and board data, passed
through platform data.

The DU has 5 possible outputs (DPAD0/1, LVDS0/1, TCON). SoC-internal
output routing data specify which output are valid, which CRTCs can be
connected to the valid outputs, and the type of in-SoC encoder for the
output.

Platform data then specifies external encoders and the output they are
connected to.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2013-06-17 03:13:11 +02:00
parent 38b62fb380
commit ef67a902e9
9 changed files with 107 additions and 22 deletions
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6
drivers/gpu/drm/rcar-du/rcar_du_crtc.c
View File

@ -129,14 +129,16 @@ static void rcar_du_crtc_set_display_timing(struct rcar_du_crtc *rcrtc)
rcar_du_crtc_write(rcrtc, DEWR, mode->hdisplay);
}
void rcar_du_crtc_route_output(struct drm_crtc *crtc, unsigned int output)
void rcar_du_crtc_route_output(struct drm_crtc *crtc,
enum rcar_du_output output)
{
struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
struct rcar_du_device *rcdu = rcrtc->group->dev;
/* Store the route from the CRTC output to the DU output. The DU will be
* configured when starting the CRTC.
*/
rcrtc->outputs |= 1 << output;
rcrtc->outputs |= BIT(output);
}
void rcar_du_crtc_update_planes(struct drm_crtc *crtc)

4
drivers/gpu/drm/rcar-du/rcar_du_crtc.h
View File

@ -15,6 +15,7 @@
#define __RCAR_DU_CRTC_H__
#include <linux/mutex.h>
#include <linux/platform_data/rcar-du.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
@ -45,7 +46,8 @@ void rcar_du_crtc_cancel_page_flip(struct rcar_du_crtc *rcrtc,
void rcar_du_crtc_suspend(struct rcar_du_crtc *rcrtc);
void rcar_du_crtc_resume(struct rcar_du_crtc *rcrtc);
void rcar_du_crtc_route_output(struct drm_crtc *crtc, unsigned int output);
void rcar_du_crtc_route_output(struct drm_crtc *crtc,
enum rcar_du_output output);
void rcar_du_crtc_update_planes(struct drm_crtc *crtc);
#endif /* __RCAR_DU_CRTC_H__ */

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

@ -219,12 +219,42 @@ static int rcar_du_remove(struct platform_device *pdev)
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,
},
},
};
static const struct rcar_du_device_info rcar_du_r8a7790_info = {
.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_ALIGN_128B
| RCAR_DU_FEATURE_DEFR8,
.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,
},
},
};
static const struct platform_device_id rcar_du_id_table[] = {

16
drivers/gpu/drm/rcar-du/rcar_du_drv.h
View File

@ -29,14 +29,30 @@ struct rcar_du_device;
#define RCAR_DU_FEATURE_ALIGN_128B (1 << 1) /* Align pitches to 128 bytes */
#define RCAR_DU_FEATURE_DEFR8 (1 << 2) /* Has DEFR8 register */
/*
* 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
*
* 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
* of in-SoC encoder for the output.
*/
struct rcar_du_output_routing {
unsigned int possible_crtcs;
unsigned int encoder_type;
};
/*
* struct rcar_du_device_info - DU model-specific information
* @features: device features (RCAR_DU_FEATURE_*)
* @num_crtcs: total number of CRTCs
* @routes: array of CRTC to output routes, indexed by output (RCAR_DU_OUTPUT_*)
*/
struct rcar_du_device_info {
unsigned int features;
unsigned int num_crtcs;
struct rcar_du_output_routing routes[RCAR_DU_OUTPUT_MAX];
};
struct rcar_du_device {

26
drivers/gpu/drm/rcar-du/rcar_du_encoder.c
View File

@ -115,10 +115,12 @@ static const struct drm_encoder_funcs encoder_funcs = {
};
int rcar_du_encoder_init(struct rcar_du_device *rcdu,
enum rcar_du_encoder_type type, unsigned int output,
enum rcar_du_encoder_type type,
enum rcar_du_output output,
const struct rcar_du_encoder_data *data)
{
struct rcar_du_encoder *renc;
unsigned int encoder_type;
int ret;
renc = devm_kzalloc(rcdu->dev, sizeof(*renc), GFP_KERNEL);
@ -127,19 +129,33 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu,
renc->output = output;
switch (type) {
case RCAR_DU_ENCODER_VGA:
encoder_type = DRM_MODE_ENCODER_DAC;
break;
case RCAR_DU_ENCODER_LVDS:
encoder_type = DRM_MODE_ENCODER_LVDS;
break;
case RCAR_DU_ENCODER_NONE:
default:
/* No external encoder, use the internal encoder type. */
encoder_type = rcdu->info->routes[output].encoder_type;
break;
}
ret = drm_encoder_init(rcdu->ddev, &renc->encoder, &encoder_funcs,
type);
encoder_type);
if (ret < 0)
return ret;
drm_encoder_helper_add(&renc->encoder, &encoder_helper_funcs);
switch (type) {
case RCAR_DU_ENCODER_LVDS:
switch (encoder_type) {
case DRM_MODE_ENCODER_LVDS:
return rcar_du_lvds_connector_init(rcdu, renc,
&data->connector.lvds.panel);
case RCAR_DU_ENCODER_VGA:
case DRM_MODE_ENCODER_DAC:
return rcar_du_vga_connector_init(rcdu, renc);
default:

5
drivers/gpu/drm/rcar-du/rcar_du_encoder.h
View File

@ -22,7 +22,7 @@ struct rcar_du_device;
struct rcar_du_encoder {
struct drm_encoder encoder;
unsigned int output;
enum rcar_du_output output;
};
#define to_rcar_encoder(e) \
@ -40,7 +40,8 @@ struct drm_encoder *
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, unsigned int output,
enum rcar_du_encoder_type type,
enum rcar_du_output output,
const struct rcar_du_encoder_data *data);
#endif /* __RCAR_DU_ENCODER_H__ */

8
drivers/gpu/drm/rcar-du/rcar_du_group.c
View File

@ -135,11 +135,11 @@ void rcar_du_group_set_routing(struct rcar_du_group *rgrp)
dorcr &= ~(DORCR_PG2T | DORCR_DK2S | DORCR_PG2D_MASK);
/* Set the DU1 pins sources. Select CRTC 0 if explicitly requested and
* CRTC 1 in all other cases to avoid cloning CRTC 0 to DU0 and DU1 by
* default.
/* Set the DPAD1 pins sources. Select CRTC 0 if explicitly requested and
* CRTC 1 in all other cases to avoid cloning CRTC 0 to DPAD0 and DPAD1
* by default.
*/
if (crtc0->outputs & (1 << 1))
if (crtc0->outputs & BIT(RCAR_DU_OUTPUT_DPAD1))
dorcr |= DORCR_PG2D_DS1;
else
dorcr |= DORCR_PG2T | DORCR_DK2S | DORCR_PG2D_DS2;

17
drivers/gpu/drm/rcar-du/rcar_du_kms.c
View File

@ -220,11 +220,14 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
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 >= rcdu->num_crtcs) {
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);
@ -234,15 +237,17 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
rcar_du_encoder_init(rcdu, pdata->type, pdata->output, pdata);
}
/* Set the possible CRTCs and possible clones. All encoders can be
* driven by the CRTC associated with the output they're connected to,
* as well as by CRTC 0.
/* 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
* possible clones field.
*/
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
const struct rcar_du_output_routing *route =
&rcdu->info->routes[renc->output];
encoder->possible_crtcs = (1 << 0) | (1 << renc->output);
encoder->possible_clones = 1 << 0;
encoder->possible_crtcs = route->possible_crtcs;
encoder->possible_clones = (1 << rcdu->pdata->num_encoders) - 1;
}
/* Now that the CRTCs have been initialized register the planes. */

17
include/linux/platform_data/rcar-du.h
View File

@ -16,8 +16,18 @@
#include <drm/drm_mode.h>
enum rcar_du_output {
RCAR_DU_OUTPUT_DPAD0,
RCAR_DU_OUTPUT_DPAD1,
RCAR_DU_OUTPUT_LVDS0,
RCAR_DU_OUTPUT_LVDS1,
RCAR_DU_OUTPUT_TCON,
RCAR_DU_OUTPUT_MAX,
};
enum rcar_du_encoder_type {
RCAR_DU_ENCODER_UNUSED = 0,
RCAR_DU_ENCODER_NONE,
RCAR_DU_ENCODER_VGA,
RCAR_DU_ENCODER_LVDS,
};
@ -39,13 +49,16 @@ struct rcar_du_connector_vga_data {
/*
* struct rcar_du_encoder_data - Encoder platform data
* @type: the encoder type (RCAR_DU_ENCODER_*)
* @output: the DU output the connector is connected to
* @output: the DU output the connector is connected to (RCAR_DU_OUTPUT_*)
* @connector.lvds: platform data for LVDS connectors
* @connector.vga: platform data for VGA connectors
*
* Encoder platform data describes an on-board encoder, its associated DU SoC
* output, and the connector.
*/
struct rcar_du_encoder_data {
enum rcar_du_encoder_type type;
unsigned int output;
enum rcar_du_output output;
union {
struct rcar_du_connector_lvds_data lvds;