src/add-ons/accelerants/intel_extreme/PanelFitter.cpp

   1 /*
   2  * Copyright 2011, Haiku, Inc. All Rights Reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              Michael Lotz, mmlr@mlotz.ch
   7  */
   8
   9
  10 #include "PanelFitter.h"
  11
  12 #include "accelerant.h"
  13 #include "intel_extreme.h"
  14
  15 #include <stdlib.h>
  16 #include <string.h>
  17
  18
  19 #undef TRACE
  20 #define TRACE_FITTER
  21 #ifdef TRACE_FITTER
  22 #   define TRACE(x...) _sPrintf("intel_extreme: " x)
  23 #else
  24 #   define TRACE(x...)
  25 #endif
  26
  27 #define ERROR(x...) _sPrintf("intel_extreme: " x)
  28 #define CALLED(x...) TRACE("CALLED %s\n", __PRETTY_FUNCTION__)
  29
  30
  31 // #pragma mark - PanelFitter
  32
  33
  34 PanelFitter::PanelFitter(int32 pipeIndex)
  35         :
  36         fBaseRegister(PCH_PANEL_FITTER_BASE_REGISTER
  37                 + pipeIndex * PCH_PANEL_FITTER_PIPE_OFFSET)
  38 {
  39 }
  40
  41
  42 bool
  43 PanelFitter::IsEnabled()
  44 {
  45         return (read32(fBaseRegister + PCH_PANEL_FITTER_CONTROL)
  46                 & PANEL_FITTER_ENABLED) != 0;
  47 }
  48
  49
  50 void
  51 PanelFitter::Enable(const display_mode& mode)
  52 {
  53         // TODO: program the right window size and position based on the mode
  54         _Enable(true);
  55 }
  56
  57
  58 void
  59 PanelFitter::Disable()
  60 {
  61         _Enable(false);
  62 }
  63
  64
  65 void
  66 PanelFitter::_Enable(bool enable)
  67 {
  68         uint32 targetRegister = fBaseRegister + PCH_PANEL_FITTER_CONTROL;
  69         write32(targetRegister, read32(targetRegister) & ~PANEL_FITTER_ENABLED
  70                 | (enable ? PANEL_FITTER_ENABLED | 0));
  71         read32(targetRegister);
  72 }