[PATCH 2/3] staging: sm750fb: Fix DAC power-off bit handling

["Ali Köse" <shroot1337@gmail.com>]

The DAC state extracted by ddk750_set_logical_disp_out() is either
0 or 1, but MISC_CTRL_DAC_POWER_OFF occupies bit 20. OR-ing the
extracted value directly into MISC_CTRL therefore clears the DAC
power-off bit and, when off is requested, sets bit 0 instead.

Translate the state into MISC_CTRL_DAC_POWER_OFF before updating
the register, preserving unrelated bits.

Fixes: 5372350be30a ("staging: sm750fb: use BIT macro for MISC_CTRL single-bit fields")
Signed-off-by: Ali Köse <shroot1337@gmail.com>
---
 drivers/staging/sm750fb/ddk750_display.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/sm750fb/ddk750_display.c b/drivers/staging/sm750fb/ddk750_display.c
index d619e00fd88e..dbbdbe08ad38 100644
--- a/drivers/staging/sm750fb/ddk750_display.c
+++ b/drivers/staging/sm750fb/ddk750_display.c
@@ -7,7 +7,8 @@
 static void set_dac(unsigned int off)
 {
 	poke32(MISC_CTRL,
-	       (peek32(MISC_CTRL) & ~MISC_CTRL_DAC_POWER_OFF) | off);
+	       (peek32(MISC_CTRL) & ~MISC_CTRL_DAC_POWER_OFF) |
+	       (off ? MISC_CTRL_DAC_POWER_OFF : 0));
 }
 
 static void set_display_control(int ctrl, int disp_state)
-- 
2.53.0