OMAP: DSS2: RFBI: clock enable/disable changes

RFBI enables and disables clocks inside almost every function to get a
finegrained control to the clocks. However, the current understanding is
that this is not necessary power-management-wise.

Change the clocking scheme so that RFBI clocks are enabled when the
omapdss_rfbi_display_enable is called, and disabled when
omapdss_rfbi_display_disable is called.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 4 insertions, 24 deletions

diff --git a/drivers/video/omap2/dss/rfbi.c b/drivers/video/omap2/dss/rfbi.c
index 46817e7fdaf4..1c19d174facb 100644
--- a/drivers/video/omap2/dss/rfbi.c
+++ b/drivers/video/omap2/dss/rfbi.c
@@ -163,7 +163,6 @@ EXPORT_SYMBOL(rfbi_bus_unlock);
 
 void omap_rfbi_write_command(const void *buf, u32 len)
 {
-        rfbi_enable_clocks(1);
         switch (rfbi.parallelmode) {
         case OMAP_DSS_RFBI_PARALLELMODE_8:
         {
@@ -187,13 +186,11 @@ void omap_rfbi_write_command(const void *buf, u32 len)
         default:
                 BUG();
         }
-        rfbi_enable_clocks(0);
 }
 EXPORT_SYMBOL(omap_rfbi_write_command);
 
 void omap_rfbi_read_data(void *buf, u32 len)
 {
-        rfbi_enable_clocks(1);
         switch (rfbi.parallelmode) {
         case OMAP_DSS_RFBI_PARALLELMODE_8:
         {
@@ -221,13 +218,11 @@ void omap_rfbi_read_data(void *buf, u32 len)
         default:
                 BUG();
         }
-        rfbi_enable_clocks(0);
 }
 EXPORT_SYMBOL(omap_rfbi_read_data);
 
 void omap_rfbi_write_data(const void *buf, u32 len)
 {
-        rfbi_enable_clocks(1);
         switch (rfbi.parallelmode) {
         case OMAP_DSS_RFBI_PARALLELMODE_8:
         {
@@ -252,7 +247,6 @@ void omap_rfbi_write_data(const void *buf, u32 len)
                 BUG();
 
         }
-        rfbi_enable_clocks(0);
 }
 EXPORT_SYMBOL(omap_rfbi_write_data);
 
@@ -264,8 +258,6 @@ void omap_rfbi_write_pixels(const void __iomem *buf, int scr_width,
         int horiz_offset = scr_width - w;
         int i;
 
-        rfbi_enable_clocks(1);
-
         if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 &&
            rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) {
                 const u16 __iomem *pd = buf;
@@ -310,8 +302,6 @@ void omap_rfbi_write_pixels(const void __iomem *buf, int scr_width,
         } else {
                 BUG();
         }
-
-        rfbi_enable_clocks(0);
 }
 EXPORT_SYMBOL(omap_rfbi_write_pixels);
 
@@ -332,8 +322,6 @@ void rfbi_transfer_area(struct omap_dss_device *dssdev, u16 width,
         rfbi.framedone_callback = callback;
         rfbi.framedone_callback_data = data;
 
-        rfbi_enable_clocks(1);
-
         rfbi_write_reg(RFBI_PIXEL_CNT, width * height);
 
         l = rfbi_read_reg(RFBI_CONTROL);
@@ -352,8 +340,6 @@ static void framedone_callback(void *data, u32 mask)
 
         REG_FLD_MOD(RFBI_CONTROL, 0, 0, 0);
 
-        rfbi_enable_clocks(0);
-
         callback = rfbi.framedone_callback;
         rfbi.framedone_callback = NULL;
 
@@ -462,7 +448,6 @@ void rfbi_set_timings(int rfbi_module, struct rfbi_timings *t)
 
         BUG_ON(!t->converted);
 
-        rfbi_enable_clocks(1);
         rfbi_write_reg(RFBI_ONOFF_TIME(rfbi_module), t->tim[0]);
         rfbi_write_reg(RFBI_CYCLE_TIME(rfbi_module), t->tim[1]);
 
@@ -471,7 +456,6 @@ void rfbi_set_timings(int rfbi_module, struct rfbi_timings *t)
                     (t->tim[2] ? 1 : 0), 4, 4);
 
         rfbi_print_timings();
-        rfbi_enable_clocks(0);
 }
 
 static int ps_to_rfbi_ticks(int time, int div)
@@ -659,7 +643,6 @@ int omap_rfbi_setup_te(enum omap_rfbi_te_mode mode,
         DSSDBG("setup_te: mode %d hs %d vs %d hs_inv %d vs_inv %d\n",
                 mode, hs, vs, hs_pol_inv, vs_pol_inv);
 
-        rfbi_enable_clocks(1);
         rfbi_write_reg(RFBI_HSYNC_WIDTH, hs);
         rfbi_write_reg(RFBI_VSYNC_WIDTH, vs);
 
@@ -672,7 +655,6 @@ int omap_rfbi_setup_te(enum omap_rfbi_te_mode mode,
                 l &= ~(1 << 20);
         else
                 l |= 1 << 20;
-        rfbi_enable_clocks(0);
 
         return 0;
 }
@@ -687,7 +669,6 @@ int omap_rfbi_enable_te(bool enable, unsigned line)
         if (line > (1 << 11) - 1)
                 return -EINVAL;
 
-        rfbi_enable_clocks(1);
         l = rfbi_read_reg(RFBI_CONFIG(0));
         l &= ~(0x3 << 2);
         if (enable) {
@@ -697,7 +678,6 @@ int omap_rfbi_enable_te(bool enable, unsigned line)
                 rfbi.te_enabled = 0;
         rfbi_write_reg(RFBI_CONFIG(0), l);
         rfbi_write_reg(RFBI_LINE_NUMBER, line);
-        rfbi_enable_clocks(0);
 
         return 0;
 }
@@ -836,8 +816,6 @@ int rfbi_configure(int rfbi_module, int bpp, int lines)
                 break;
         }
 
-        rfbi_enable_clocks(1);
-
         REG_FLD_MOD(RFBI_CONTROL, 0, 3, 2); /* clear CS */
 
         l = 0;
@@ -871,8 +849,6 @@ int rfbi_configure(int rfbi_module, int bpp, int lines)
         DSSDBG("RFBI config: bpp %d, lines %d, cycles: 0x%x 0x%x 0x%x\n",
                bpp, lines, cycle1, cycle2, cycle3);
 
-        rfbi_enable_clocks(0);
-
         return 0;
 }
 EXPORT_SYMBOL(rfbi_configure);
@@ -975,6 +951,8 @@ int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev)
 {
         int r;
 
+        rfbi_enable_clocks(1);
+
         r = omap_dss_start_device(dssdev);
         if (r) {
                 DSSERR("failed to start device\n");
@@ -1017,6 +995,8 @@ void omapdss_rfbi_display_disable(struct omap_dss_device *dssdev)
         omap_dispc_unregister_isr(framedone_callback, NULL,
                         DISPC_IRQ_FRAMEDONE);
         omap_dss_stop_device(dssdev);
+
+        rfbi_enable_clocks(0);
 }
 EXPORT_SYMBOL(omapdss_rfbi_display_disable);