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// SPDX-License-Identifier: MIT
#include <drm/drm_atomic_state_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_modeset_helper_vtables.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#include "ast_ddc.h"
#include "ast_drv.h"
/*
* Encoder
*/
static const struct drm_encoder_funcs ast_vga_encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
/*
* Connector
*/
static int ast_vga_connector_helper_get_modes(struct drm_connector *connector)
{
struct ast_connector *ast_connector = to_ast_connector(connector);
int count;
if (ast_connector->physical_status == connector_status_connected) {
count = drm_connector_helper_get_modes(connector);
} else {
/*
* There's no EDID data without a connected monitor. Set BMC-
* compatible modes in this case. The XGA default resolution
* should work well for all BMCs.
*/
count = drm_add_modes_noedid(connector, 4096, 4096);
if (count)
drm_set_preferred_mode(connector, 1024, 768);
}
return count;
}
static int ast_vga_connector_helper_detect_ctx(struct drm_connector *connector,
struct drm_modeset_acquire_ctx *ctx,
bool force)
{
struct ast_connector *ast_connector = to_ast_connector(connector);
enum drm_connector_status status;
status = drm_connector_helper_detect_from_ddc(connector, ctx, force);
if (status != ast_connector->physical_status)
++connector->epoch_counter;
ast_connector->physical_status = status;
return connector_status_connected;
}
static const struct drm_connector_helper_funcs ast_vga_connector_helper_funcs = {
.get_modes = ast_vga_connector_helper_get_modes,
.detect_ctx = ast_vga_connector_helper_detect_ctx,
};
static const struct drm_connector_funcs ast_vga_connector_funcs = {
.reset = drm_atomic_helper_connector_reset,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = drm_connector_cleanup,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static int ast_vga_connector_init(struct drm_device *dev, struct drm_connector *connector)
{
struct ast_device *ast = to_ast_device(dev);
struct i2c_adapter *ddc;
int ret;
ddc = ast_ddc_create(ast);
if (IS_ERR(ddc)) {
ret = PTR_ERR(ddc);
drm_err(dev, "failed to add DDC bus for connector; ret=%d\n", ret);
return ret;
}
ret = drm_connector_init_with_ddc(dev, connector, &ast_vga_connector_funcs,
DRM_MODE_CONNECTOR_VGA, ddc);
if (ret)
return ret;
drm_connector_helper_add(connector, &ast_vga_connector_helper_funcs);
connector->interlace_allowed = 0;
connector->doublescan_allowed = 0;
connector->polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT;
return 0;
}
int ast_vga_output_init(struct ast_device *ast)
{
struct drm_device *dev = &ast->base;
struct drm_crtc *crtc = &ast->crtc;
struct drm_encoder *encoder = &ast->output.vga.encoder;
struct ast_connector *ast_connector = &ast->output.vga.connector;
struct drm_connector *connector = &ast_connector->base;
int ret;
ret = drm_encoder_init(dev, encoder, &ast_vga_encoder_funcs,
DRM_MODE_ENCODER_DAC, NULL);
if (ret)
return ret;
encoder->possible_crtcs = drm_crtc_mask(crtc);
ret = ast_vga_connector_init(dev, connector);
if (ret)
return ret;
ast_connector->physical_status = connector->status;
ret = drm_connector_attach_encoder(connector, encoder);
if (ret)
return ret;
return 0;
}
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