drm: xilinx: dp: Add runtime PM calls in dpms function

Call the pm_runtime_get/put() based on the requested DPMS.
These calls are translated into PMU FW APIs at the end.

Signed-off-by: Hyun Kwon <hyun.kwon@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/drivers/gpu/drm/xilinx/xilinx_drm_dp.c b/drivers/gpu/drm/xilinx/xilinx_drm_dp.c
index 0fe26dca33b34f35ad4c524f1970fa24a6360fa5..0a591d396d940f99e959888def4167883ef2271c 100644 (file)
--- a/drivers/gpu/drm/xilinx/xilinx_drm_dp.c
+++ b/drivers/gpu/drm/xilinx/xilinx_drm_dp.c
@@ -29,7 +29,7 @@
 #include <linux/phy/phy.h>
 #include <linux/phy/phy-zynqmp.h>
 #include <linux/platform_device.h>
-#include <linux/pm.h>
+#include <linux/pm_runtime.h>
 
 #include "xilinx_drm_dp_sub.h"
 #include "xilinx_drm_drv.h"
@@ -870,6 +870,8 @@ static void xilinx_drm_dp_dpms(struct drm_encoder *encoder, int dpms)
 
        switch (dpms) {
        case DRM_MODE_DPMS_ON:
+               pm_runtime_get_sync(dp->dev);
+
                if (dp->aud_clk)
                        xilinx_drm_writel(iomem, XILINX_DP_TX_AUDIO_CONTROL, 1);
 
@@ -895,6 +897,8 @@ static void xilinx_drm_dp_dpms(struct drm_encoder *encoder, int dpms)
                if (dp->aud_clk)
                        xilinx_drm_writel(iomem, XILINX_DP_TX_AUDIO_CONTROL, 0);
 
+               pm_runtime_put_sync(dp->dev);
+
                return;
        }
 }
@@ -1543,6 +1547,8 @@ static int xilinx_drm_dp_probe(struct platform_device *pdev)
                 ((version & XILINX_DP_TX_CORE_ID_REVISION_MASK) >>
                  XILINX_DP_TX_CORE_ID_REVISION_SHIFT));
 
+       pm_runtime_enable(dp->dev);
+
        return 0;
 
 error:
@@ -1570,6 +1576,7 @@ static int xilinx_drm_dp_remove(struct platform_device *pdev)
        struct xilinx_drm_dp *dp = platform_get_drvdata(pdev);
        unsigned int i;
 
+       pm_runtime_disable(dp->dev);
        xilinx_drm_writel(dp->iomem, XILINX_DP_TX_ENABLE, 0);
 
        drm_dp_aux_unregister(&dp->aux);