Revert "ARM: OMAP2+: Remove legacy mux code for display.c"

Commit e30b06f4d5f000c31a7747a7e7ada78a5fd419a1 (ARM: OMAP2+: Remove
legacy mux code for display.c) removed non-DT DSI and HDMI pinmuxing.
However, DSI pinmuxing is still needed, and removing that caused DSI
displays not to work.

This reverts the DSI parts of the commit.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/mach-omap2/display.c b/arch/arm/mach-omap2/display.c
index 58347bb874a01dcd4d203f4f191712d473a338a3..4cf165502b35cfdd06c09696a20b09758d974169 100644 (file)
--- a/arch/arm/mach-omap2/display.c
+++ b/arch/arm/mach-omap2/display.c
@@ -101,13 +101,51 @@ static const struct omap_dss_hwmod_data omap4_dss_hwmod_data[] __initconst = {
        { "dss_hdmi", "omapdss_hdmi", -1 },
 };
 
+static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes)
+{
+       u32 enable_mask, enable_shift;
+       u32 pipd_mask, pipd_shift;
+       u32 reg;
+
+       if (dsi_id == 0) {
+               enable_mask = OMAP4_DSI1_LANEENABLE_MASK;
+               enable_shift = OMAP4_DSI1_LANEENABLE_SHIFT;
+               pipd_mask = OMAP4_DSI1_PIPD_MASK;
+               pipd_shift = OMAP4_DSI1_PIPD_SHIFT;
+       } else if (dsi_id == 1) {
+               enable_mask = OMAP4_DSI2_LANEENABLE_MASK;
+               enable_shift = OMAP4_DSI2_LANEENABLE_SHIFT;
+               pipd_mask = OMAP4_DSI2_PIPD_MASK;
+               pipd_shift = OMAP4_DSI2_PIPD_SHIFT;
+       } else {
+               return -ENODEV;
+       }
+
+       reg = omap4_ctrl_pad_readl(OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_DSIPHY);
+
+       reg &= ~enable_mask;
+       reg &= ~pipd_mask;
+
+       reg |= (lanes << enable_shift) & enable_mask;
+       reg |= (lanes << pipd_shift) & pipd_mask;
+
+       omap4_ctrl_pad_writel(reg, OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_DSIPHY);
+
+       return 0;
+}
+
 static int omap_dsi_enable_pads(int dsi_id, unsigned lane_mask)
 {
+       if (cpu_is_omap44xx())
+               return omap4_dsi_mux_pads(dsi_id, lane_mask);
+
        return 0;
 }
 
 static void omap_dsi_disable_pads(int dsi_id, unsigned lane_mask)
 {
+       if (cpu_is_omap44xx())
+               omap4_dsi_mux_pads(dsi_id, 0);
 }
 
 static int omap_dss_set_min_bus_tput(struct device *dev, unsigned long tput)