OMAP: DSS2: DSI: Wait for DSI PLL clocks to be active before selecting them
The TRM tells us to wait for the DSI PLL derived clocks to become
active before selecting them for use. I didn't actually have any issues
which this would fix but according to the TRM it seems to be the right
thing to do.
Signed-off-by: Ville Syrjälä <ville.syrjala@nokia.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
index 24b1825..77c3621 100644
--- a/drivers/video/omap2/dss/dss.c
+++ b/drivers/video/omap2/dss/dss.c
@@ -265,6 +265,9 @@
b = clk_src == DSS_SRC_DSS1_ALWON_FCLK ? 0 : 1;
+ if (clk_src == DSS_SRC_DSI1_PLL_FCLK)
+ dsi_wait_dsi1_pll_active();
+
REG_FLD_MOD(DSS_CONTROL, b, 0, 0); /* DISPC_CLK_SWITCH */
dss.dispc_clk_source = clk_src;
@@ -279,6 +282,9 @@
b = clk_src == DSS_SRC_DSS1_ALWON_FCLK ? 0 : 1;
+ if (clk_src == DSS_SRC_DSI2_PLL_FCLK)
+ dsi_wait_dsi2_pll_active();
+
REG_FLD_MOD(DSS_CONTROL, b, 1, 1); /* DSI_CLK_SWITCH */
dss.dsi_clk_source = clk_src;