Further cleanup and unification of i2c code

- unify the ddc and i2c code
- add gpio mask support for legacy chips
- remove the magic gpio dance for ancient monitors
  (if you have an ancient monitor that ddc stops
   working on let me know).  This should speed up DDC
  on legacy chips.

-- radeon sw gpio i2c --
4 sets of gpio registers for clk and data and corresponding bit masks
mask - locks the gpio for use by sw
get  - reads the value off the gpio pad
put  - sets the gpio direction to output
a    - "other stuff" On legacy chips you clear them if you want
       to use a gpio for i2c.  In some cases they are used for the
       output value when the gpio in the output state.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/radeon_probe.h b/src/radeon_probe.h
index 944ab9fa..3770abfd 100644
--- a/src/radeon_probe.h
+++ b/src/radeon_probe.h
@@ -166,6 +166,8 @@ typedef struct
     Bool   valid;
     uint32_t mask_clk_reg;
     uint32_t mask_data_reg;
+    uint32_t a_clk_reg;
+    uint32_t a_data_reg;
     uint32_t put_clk_reg;
     uint32_t put_data_reg;
     uint32_t get_clk_reg;
@@ -176,6 +178,8 @@ typedef struct
     uint32_t put_data_mask;
     uint32_t get_clk_mask;
     uint32_t get_data_mask;
+    uint32_t a_clk_mask;
+    uint32_t a_data_mask;
 } RADEONI2CBusRec, *RADEONI2CBusPtr;
 
 typedef struct _RADEONCrtcPrivateRec {