drm/msm/mdp5: set rate before enabling clk

Set a "safe" rate at first, in order to read out the hw revision.  And
then after set the optimal value.

Signed-off-by: Rob Clark <robdclark@gmail.com>

diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c
index 64de0f9310c328d9f50b8e3dafb07408b03a6c69..adb45419b08d5a7bbda8ce002ddd0354f798db8a 100644 (file)
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c
@@ -323,6 +323,12 @@ struct msm_kms *mdp5_kms_init(struct drm_device *dev)
        if (ret)
                goto fail;
 
+       /* we need to set a default rate before enabling.  Set a safe
+        * rate first, then figure out hw revision, and then set a
+        * more optimal rate:
+        */
+       clk_set_rate(mdp5_kms->src_clk, 200000000);
+
        read_hw_revision(mdp5_kms, &major, &minor);
        priv = mdp5_cfg_init(mdp5_kms, major, minor);
        if (IS_ERR(priv)) {