1 files changed, 11 insertions, 5 deletions

diff --git a/drivers/gpu/drm/msm/dsi/dsi_phy.c b/drivers/gpu/drm/msm/dsi/dsi_phy.c
index bd37e61123bf..799201e1a14f 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_phy.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_phy.c
@@ -157,17 +157,21 @@ fail:
         return ret;
 }
 
-static void dsi_phy_set_src_pll(struct msm_dsi_phy *phy, int pll_id, u32 reg)
+static void dsi_phy_set_src_pll(struct msm_dsi_phy *phy, int pll_id, u32 reg,
+                                u32 bit_mask)
 {
         int phy_id = phy->id;
+        u32 val;
 
         if ((phy_id >= DSI_MAX) || (pll_id >= DSI_MAX))
                 return;
 
+        val = dsi_phy_read(phy->base + reg);
+
         if (phy->cfg->src_pll_truthtable[phy_id][pll_id])
-                dsi_phy_write(phy->base + reg, 0x01);
+                dsi_phy_write(phy->base + reg, val | bit_mask);
         else
-                dsi_phy_write(phy->base + reg, 0x00);
+                dsi_phy_write(phy->base + reg, val & (~bit_mask));
 }
 
 #define S_DIV_ROUND_UP(n, d)    \
@@ -389,7 +393,8 @@ static int dsi_28nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
 
         dsi_phy_write(base + REG_DSI_28nm_PHY_CTRL_0, 0x5f);
 
-        dsi_phy_set_src_pll(phy, src_pll_id, REG_DSI_28nm_PHY_GLBL_TEST_CTRL);
+        dsi_phy_set_src_pll(phy, src_pll_id, REG_DSI_28nm_PHY_GLBL_TEST_CTRL,
+                        DSI_28nm_PHY_GLBL_TEST_CTRL_BITCLK_HS_SEL);
 
         return 0;
 }
@@ -451,7 +456,8 @@ static int dsi_20nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
 
         dsi_phy_write(base + REG_DSI_20nm_PHY_STRENGTH_0, 0xff);
 
-        dsi_phy_set_src_pll(phy, src_pll_id, REG_DSI_20nm_PHY_GLBL_TEST_CTRL);
+        dsi_phy_set_src_pll(phy, src_pll_id, REG_DSI_20nm_PHY_GLBL_TEST_CTRL,
+                        DSI_20nm_PHY_GLBL_TEST_CTRL_BITCLK_HS_SEL);
 
         for (i = 0; i < 4; i++) {
                 dsi_phy_write(base + REG_DSI_20nm_PHY_LN_CFG_3(i),