static int tegra_dc_rgb_init(struct tegra_dc *dc)
{
struct tegra_edid *edid;
struct tegra_dc_edid *dc_edid;
struct fb_monspecs specs;
int err;
if (dc->out == NULL || dc->out->dcc_bus < 0)
return 0;
edid = tegra_edid_create(dc->out->dcc_bus);
if (IS_ERR_OR_NULL(edid)) {
dev_err(&dc->ndev->dev, "rgb: can't create edid\n");
return PTR_ERR(edid);
}
err = tegra_edid_get_monspecs(edid, &specs);
if (err < 0) {
dev_err(&dc->ndev->dev, "error reading edid\n");
return err;
}
if (dc->pdata->default_out->n_modes > 0) {
dc->mode.h_sync_width = specs.modedb->hsync_len;
dc->mode.v_sync_width = specs.modedb->vsync_len;
dc->mode.h_back_porch = specs.modedb->left_margin;
dc->mode.v_back_porch = specs.modedb->upper_margin;
dc->mode.h_active = specs.modedb->xres;
dc->mode.v_active = specs.modedb->yres;
dc->mode.h_front_porch = specs.modedb->right_margin;
if (!machine_is_avalon() && !machine_is_titan())
dc->mode.pclk = PICOS2KHZ(specs.modedb->pixclock) * 1000;
if (!machine_is_avalon())
dc->mode.v_front_porch = specs.modedb->lower_margin;
}
if (dc->pdata->fb) {
dc->pdata->fb->xres = specs.modedb->xres;
dc->pdata->fb->yres = specs.modedb->yres;
}
dc_edid = tegra_edid_get_data(edid);
if (IS_ERR_OR_NULL(dc_edid))
return PTR_ERR(dc_edid);
dc->out->width = dc_edid->buf[DTD_H_SIZE];
dc->out->height = dc_edid->buf[DTD_V_SIZE];
tegra_edid_put_data(dc_edid);
if (specs.modedb->xres > specs.modedb->yres) {
if (dc->out->width <= dc->out->height)
dc->out->width += 0xFF;
} else {
if (dc->out->width > dc->out->height)
dc->out->height += 0xFF;
}
fb_destroy_modedb(specs.modedb);
return 0;
}
/* re-read the edid and check to see if it has changed. Return 0 on a
* successful E-EDID read, or a non-zero error code on failure. If we succeed,
* set match to 1 if the old E-EDID matches the new E-EDID. Otherwise, set
* match to 0. */
static int hdmi_recheck_edid(struct tegra_dc_hdmi_data *hdmi, int *match)
{
int ret;
u8 tmp[HDMI_EDID_MAX_LENGTH] = {0};
ret = read_edid_into_buffer(hdmi, tmp, sizeof(tmp));
pr_info("%s: read_edid_into_buffer() returned %d\n", __func__, ret);
if (ret > 0) {
struct tegra_dc_edid *data = tegra_edid_get_data(hdmi->edid);
pr_info("old edid len = %d\n", data->len);
*match = ((ret == data->len) &&
!memcmp(tmp, data->buf, data->len));
if (*match == 0) {
print_hex_dump(KERN_INFO, "tmp :", DUMP_PREFIX_ADDRESS,
16, 4, tmp, ret, true);
print_hex_dump(KERN_INFO, "data:", DUMP_PREFIX_ADDRESS,
16, 4, data->buf, data->len, true);
}
tegra_edid_put_data(data);
ret = 0;
}
return ret;
}
