viafb: introduce per output device power management

This patch moves common parts of dvi.c, lcd.c and vt1636.c to hw.c to
start a per output device power management. There should be no runtime
changes aside that this patch enables the proc interface to enable/disable
devices when needed which greatly increases the chances that changes to
the output device configuration will work. However the power management is
not yet complete so it might fail on some configurations. As this area is
quite complex and touches undocumented things there is a slight chance of
regressions.

Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/video/via/hw.h b/drivers/video/via/hw.h
index 657dbd64a089..b067cbb45ebf 100644
--- a/drivers/video/via/hw.h
+++ b/drivers/video/via/hw.h
@@ -41,6 +41,12 @@
 #define VIA_LVDS1       0x00000040
 #define VIA_LVDS2       0x00000080
 
+/* VIA output device power states */
+#define VIA_STATE_ON            0
+#define VIA_STATE_STANDBY       1
+#define VIA_STATE_SUSPEND       2
+#define VIA_STATE_OFF           3
+
 /***************************************************
 * Definition IGA1 Design Method of CRTC Registers *
 ****************************************************/
@@ -904,9 +910,8 @@ void viafb_set_vclock(u32 CLK, int set_iga);
 void viafb_load_reg(int timing_value, int viafb_load_reg_num,
         struct io_register *reg,
               int io_type);
-void viafb_crt_disable(void);
-void viafb_crt_enable(void);
 void via_set_source(u32 devices, u8 iga);
+void via_set_state(u32 devices, u8 state);
 u32 via_parse_odev(char *input, char **end);
 void via_odev_to_seq(struct seq_file *m, u32 odev);
 void init_ad9389(void);