static int dpi_verify_dsi_pll(struct platform_device *dsidev)
{
int r;
/* do initial setup with the PLL to see if it is operational */
r = dsi_runtime_get(dsidev);
if (r)
return r;
r = dsi_pll_init(dsidev, 0, 1);
if (r) {
dsi_runtime_put(dsidev);
return r;
}
dsi_pll_uninit(dsidev, true);
dsi_runtime_put(dsidev);
return 0;
}
/*
* enables mainclk (DSS clocks on OMAP4 if any device is enabled.
* Returns 0 on success.
*/
int dss_clken_restore_ctx(void)
{
int r;
struct bus_type *bus = dss_get_bus();
DSSDBG("%s enter\n", __func__);
r = bus_for_each_dev(bus, NULL, NULL, dss_check_state_disabled);
if (r) {
r = dsi_runtime_get();
if ((!r) && (atomic_cmpxchg(&context_state,
DSS_CONTEXT_NOT_RESTORED, DSS_CONTEXT_RESTORED) ==
DSS_CONTEXT_NOT_RESTORED)) {
restore_all_ctx();
}
return r;
} else {
/* All devices are disabled/suspended */
return -EAGAIN;
}
}
static int dpi_display_enable(struct omap_dss_device *dssdev)
{
struct omap_dss_device *out = &dpi.output;
int r;
mutex_lock(&dpi.lock);
if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI) && !dpi.vdds_dsi_reg) {
DSSERR("no VDSS_DSI regulator\n");
r = -ENODEV;
goto err_no_reg;
}
if (out == NULL || out->manager == NULL) {
DSSERR("failed to enable display: no output/manager\n");
r = -ENODEV;
goto err_no_out_mgr;
}
if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI)) {
r = regulator_enable(dpi.vdds_dsi_reg);
if (r)
goto err_reg_enable;
}
r = dispc_runtime_get();
if (r)
goto err_get_dispc;
r = dss_dpi_select_source(out->manager->id);
if (r)
goto err_src_sel;
if (dpi.dsidev) {
r = dsi_runtime_get(dpi.dsidev);
if (r)
goto err_get_dsi;
r = dsi_pll_init(dpi.dsidev, 0, 1);
if (r)
goto err_dsi_pll_init;
}
r = dpi_set_mode(out->manager);
if (r)
goto err_set_mode;
dpi_config_lcd_manager(out->manager);
mdelay(2);
r = dss_mgr_enable(out->manager);
if (r)
goto err_mgr_enable;
mutex_unlock(&dpi.lock);
return 0;
err_mgr_enable:
err_set_mode:
if (dpi.dsidev)
dsi_pll_uninit(dpi.dsidev, true);
err_dsi_pll_init:
if (dpi.dsidev)
dsi_runtime_put(dpi.dsidev);
err_get_dsi:
err_src_sel:
dispc_runtime_put();
err_get_dispc:
if (dss_has_feature(FEAT_DPI_USES_VDDS_DSI))
regulator_disable(dpi.vdds_dsi_reg);
err_reg_enable:
err_no_out_mgr:
err_no_reg:
mutex_unlock(&dpi.lock);
return r;
}
int omapdss_dpi_display_enable(struct omap_dss_device *dssdev)
{
int r;
r = omap_dss_start_device(dssdev);
if (r) {
DSSERR("failed to start device\n");
goto err_start_dev;
}
if (cpu_is_omap34xx()) {
r = regulator_enable(dpi.vdds_dsi_reg);
if (r)
goto err_reg_enable;
}
r = dss_runtime_get();
if (r)
goto err_get_dss;
if (!dssdev->skip_init) {
r = dispc_runtime_get();
if (r)
goto err_get_dispc;
}
dpi_basic_init(dssdev);
if (dpi_use_dsi_pll(dssdev)) {
r = dsi_runtime_get(dpi.dsidev);
if (r)
goto err_get_dsi;
if (!dssdev->skip_init) {
r = dsi_pll_init(dpi.dsidev, 0, 1);
if (r)
goto err_dsi_pll_init;
}
}
r = dpi_set_mode(dssdev);
if (r)
goto err_set_mode;
mdelay(2);
dssdev->manager->enable(dssdev->manager);
if (dssdev->skip_init)
dssdev->skip_init = false;
return 0;
err_set_mode:
if (dpi_use_dsi_pll(dssdev))
dsi_pll_uninit(dpi.dsidev, true);
err_dsi_pll_init:
if (dpi_use_dsi_pll(dssdev))
dsi_runtime_put(dpi.dsidev);
err_get_dsi:
dispc_runtime_put();
err_get_dispc:
dss_runtime_put();
err_get_dss:
if (cpu_is_omap34xx())
regulator_disable(dpi.vdds_dsi_reg);
err_reg_enable:
omap_dss_stop_device(dssdev);
err_start_dev:
return r;
}
int omapdss_dpi_display_enable(struct omap_dss_device *dssdev)
{
int r;
if (cpu_is_omap34xx() && !dpi.vdds_dsi_reg) {
DSSERR("no VDSS_DSI regulator\n");
return -ENODEV;
}
if (dssdev->manager == NULL) {
DSSERR("failed to enable display: no manager\n");
return -ENODEV;
}
r = omap_dss_start_device(dssdev);
if (r) {
DSSERR("failed to start device\n");
goto err_start_dev;
}
if (cpu_is_omap34xx()) {
r = regulator_enable(dpi.vdds_dsi_reg);
if (r)
goto err_reg_enable;
}
r = dispc_runtime_get();
if (r)
goto err_get_dispc;
dpi_basic_init(dssdev);
if (dpi_use_dsi_pll(dssdev)) {
r = dsi_runtime_get(dpi.dsidev);
if (r)
goto err_get_dsi;
r = dsi_pll_init(dpi.dsidev, 0, 1);
if (r)
goto err_dsi_pll_init;
}
r = dpi_set_mode(dssdev);
if (r)
goto err_set_mode;
mdelay(2);
r = dss_mgr_enable(dssdev->manager);
if (r)
goto err_mgr_enable;
return 0;
err_mgr_enable:
err_set_mode:
if (dpi_use_dsi_pll(dssdev))
dsi_pll_uninit(dpi.dsidev, true);
err_dsi_pll_init:
if (dpi_use_dsi_pll(dssdev))
dsi_runtime_put(dpi.dsidev);
err_get_dsi:
dispc_runtime_put();
err_get_dispc:
if (cpu_is_omap34xx())
regulator_disable(dpi.vdds_dsi_reg);
err_reg_enable:
omap_dss_stop_device(dssdev);
err_start_dev:
return r;
}