drm/omap: HDMI PLL: use runtime pm

To make it possible to use HDMI PLL for other video outputs than HDMI,
the HDMI PLL code needs to do runtime_get/put for the HDMI IP, so that
the IP (include the PLL) is enabled.

To do that we also need to store the HDMI pdev in the hdmi_pll_data.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

2 files changed, 10 insertions, 0 deletions

diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi.h b/drivers/gpu/drm/omapdrm/dss/hdmi.h
index 53616b02b613..d8757abfa175 100644
--- a/drivers/gpu/drm/omapdrm/dss/hdmi.h
+++ b/drivers/gpu/drm/omapdrm/dss/hdmi.h
@@ -240,6 +240,7 @@ struct hdmi_pll_data {
 
         void __iomem *base;
 
+        struct platform_device *pdev;
         struct hdmi_wp_data *wp;
 };
 
diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi_pll.c b/drivers/gpu/drm/omapdrm/dss/hdmi_pll.c
index 110ed50d5ce1..a9896e7454c5 100644
--- a/drivers/gpu/drm/omapdrm/dss/hdmi_pll.c
+++ b/drivers/gpu/drm/omapdrm/dss/hdmi_pll.c
@@ -16,6 +16,7 @@
 #include <linux/io.h>
 #include <linux/platform_device.h>
 #include <linux/clk.h>
+#include <linux/pm_runtime.h>
 
 #include <video/omapdss.h>
 
@@ -104,6 +105,9 @@ static int hdmi_pll_enable(struct dss_pll *dsspll)
         struct hdmi_wp_data *wp = pll->wp;
         int r;
 
+        r = pm_runtime_get_sync(&pll->pdev->dev);
+        WARN_ON(r < 0);
+
         dss_ctrl_pll_enable(DSS_PLL_HDMI, true);
 
         r = hdmi_wp_set_pll_pwr(wp, HDMI_PLLPWRCMD_BOTHON_ALLCLKS);
@@ -117,10 +121,14 @@ static void hdmi_pll_disable(struct dss_pll *dsspll)
 {
         struct hdmi_pll_data *pll = container_of(dsspll, struct hdmi_pll_data, pll);
         struct hdmi_wp_data *wp = pll->wp;
+        int r;
 
         hdmi_wp_set_pll_pwr(wp, HDMI_PLLPWRCMD_ALLOFF);
 
         dss_ctrl_pll_enable(DSS_PLL_HDMI, false);
+
+        r = pm_runtime_put_sync(&pll->pdev->dev);
+        WARN_ON(r < 0 && r != -ENOSYS);
 }
 
 static const struct dss_pll_ops dsi_pll_ops = {
@@ -228,6 +236,7 @@ int hdmi_pll_init(struct platform_device *pdev, struct hdmi_pll_data *pll,
         int r;
         struct resource *res;
 
+        pll->pdev = pdev;
         pll->wp = wp;
 
         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pll");