Re: [PATCH 4/8] OMAPDSS: HDMI: use vdda_hdmi_dac

The HDMI driver requires vdda_hdmi_dac power for operation, but does not
enable it. This has worked because the regulator has been always
enabled.

But this may not always be the case, as I encountered when implementing
HDMI device tree support.

This patch changes the HDMI driver to use the vdda_hdmi_dac.

Signed-off-by: Tomi Valkeinen <redacted>
---
  drivers/video/omap2/dss/hdmi.c |   23 +++++++++++++++++++++++
  1 file changed, 23 insertions(+)

diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index 96a6e29..ccfc677 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c

@@ -33,6 +33,7 @@
  #include <linux/pm_runtime.h>
  #include <linux/clk.h>
  #include <linux/gpio.h>
+#include <linux/regulator/consumer.h>
  #include <video/omapdss.h>

  #include "ti_hdmi.h"

@@ -62,6 +63,7 @@ static struct {
  	struct hdmi_ip_data ip_data;

  	struct clk *sys_clk;
+	struct regulator *vdda_hdmi_dac_reg;

  	int ct_cp_hpd_gpio;
  	int ls_oe_gpio;

@@ -331,6 +333,19 @@ static int __init hdmi_init_display(struct omap_dss_device *dssdev)

  	dss_init_hdmi_ip_ops(&hdmi.ip_data);

+	if (hdmi.vdda_hdmi_dac_reg = NULL) {
+		struct regulator *reg;
+
+		reg = devm_regulator_get(&hdmi.pdev->dev, "vdda_hdmi_dac");