OMAP: DSS2: DSI: Fix DSI PLL power bug

OMAP3630 has a HW bug causing DSI PLL power command POWER_ON_DIV (0x3)
to not work properly. The bug prevents us from enabling DSI PLL power
only to HS divider block.

This patch adds a dss feature for the bug and converts POWER_ON_DIV
requests to POWER_ON_ALL (0x2).
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/omap2/dss/dsi.c

@@ -1059,6 +1059,11 @@ static int dsi_pll_power(enum dsi_pll_power_state state)
 {
 	int t = 0;
 
+	/* DSI-PLL power command 0x3 is not working */
+	if (dss_has_feature(FEAT_DSI_PLL_PWR_BUG) &&
+			state == DSI_PLL_POWER_ON_DIV)
+		state = DSI_PLL_POWER_ON_ALL;
+
 	REG_FLD_MOD(DSI_CLK_CTRL, state, 31, 30);	/* PLL_PWR_CMD */
 
 	/* PLL_PWR_STATUS */

drivers/video/omap2/dss/dss_features.c

@@ -271,7 +271,7 @@ static struct omap_dss_features omap3630_dss_features = {
 		FEAT_LCDENABLESIGNAL | FEAT_PCKFREEENABLE |
 		FEAT_PRE_MULT_ALPHA | FEAT_FUNCGATED |
 		FEAT_ROWREPEATENABLE | FEAT_LINEBUFFERSPLIT |
-		FEAT_RESIZECONF,
+		FEAT_RESIZECONF | FEAT_DSI_PLL_PWR_BUG,
 
 	.num_mgrs = 2,
 	.num_ovls = 3,

drivers/video/omap2/dss/dss_features.h

@@ -40,6 +40,8 @@ enum dss_feat_id {
 	/* Independent core clk divider */
 	FEAT_CORE_CLK_DIV	= 1 << 11,
 	FEAT_LCD_CLK_SRC	= 1 << 12,
+	/* DSI-PLL power command 0x3 is not working */
+	FEAT_DSI_PLL_PWR_BUG	= 1 << 13,
 };
 
 /* DSS register field id */