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-rw-r--r--kms++/inc/kms++/videomode.h19
-rw-r--r--kms++/src/videomode.cpp82
2 files changed, 98 insertions, 3 deletions
diff --git a/kms++/inc/kms++/videomode.h b/kms++/inc/kms++/videomode.h
index ec16969..39e5639 100644
--- a/kms++/inc/kms++/videomode.h
+++ b/kms++/inc/kms++/videomode.h
@@ -9,6 +9,13 @@
namespace kms
{
+enum class SyncPolarity
+{
+ Undefined,
+ Positive,
+ Negative,
+};
+
struct Videomode
{
std::string name;
@@ -32,8 +39,18 @@ struct Videomode
uint16_t vsw() const { return vsync_end - vsync_start; }
uint16_t vbp() const { return vtotal - vsync_end; }
- bool interlace() const;
float calculated_vrefresh() const;
+
+ bool interlace() const;
+ SyncPolarity hsync() const;
+ SyncPolarity vsync() const;
+
+ void set_interlace(bool ilace);
+ void set_hsync(SyncPolarity pol);
+ void set_vsync(SyncPolarity pol);
};
+struct Videomode videomode_from_timings(uint32_t clock_khz,
+ uint16_t hact, uint16_t hfp, uint16_t hsw, uint16_t hbp,
+ uint16_t vact, uint16_t vfp, uint16_t vsw, uint16_t vbp);
}
diff --git a/kms++/src/videomode.cpp b/kms++/src/videomode.cpp
index 16330bb..107ee3b 100644
--- a/kms++/src/videomode.cpp
+++ b/kms++/src/videomode.cpp
@@ -16,14 +16,92 @@ unique_ptr<Blob> Videomode::to_blob(Card& card) const
return unique_ptr<Blob>(new Blob(card, &drm_mode, sizeof(drm_mode)));
}
+float Videomode::calculated_vrefresh() const
+{
+ return (clock * 1000.0) / (htotal * vtotal) * (interlace() ? 2 : 1);
+}
+
bool Videomode::interlace() const
{
return flags & DRM_MODE_FLAG_INTERLACE;
}
-float Videomode::calculated_vrefresh() const
+SyncPolarity Videomode::hsync() const
{
- return (clock * 1000.0) / (htotal * vtotal) * (interlace() ? 2 : 1);
+ if (flags & DRM_MODE_FLAG_PHSYNC)
+ return SyncPolarity::Positive;
+ if (flags & DRM_MODE_FLAG_NHSYNC)
+ return SyncPolarity::Negative;
+ return SyncPolarity::Undefined;
+}
+
+SyncPolarity Videomode::vsync() const
+{
+ if (flags & DRM_MODE_FLAG_PVSYNC)
+ return SyncPolarity::Positive;
+ if (flags & DRM_MODE_FLAG_NVSYNC)
+ return SyncPolarity::Negative;
+ return SyncPolarity::Undefined;
+}
+
+void Videomode::set_interlace(bool ilace)
+{
+ if (ilace)
+ flags |= DRM_MODE_FLAG_INTERLACE;
+ else
+ flags &= ~DRM_MODE_FLAG_INTERLACE;
+}
+
+void Videomode::set_hsync(SyncPolarity pol)
+{
+ flags &= ~(DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NHSYNC);
+
+ switch (pol) {
+ case SyncPolarity::Positive:
+ flags |= DRM_MODE_FLAG_PHSYNC;
+ break;
+ case SyncPolarity::Negative:
+ flags |= DRM_MODE_FLAG_NHSYNC;
+ break;
+ default:
+ break;
+ }
+}
+
+void Videomode::set_vsync(SyncPolarity pol)
+{
+ flags &= ~(DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_NVSYNC);
+
+ switch (pol) {
+ case SyncPolarity::Positive:
+ flags |= DRM_MODE_FLAG_PVSYNC;
+ break;
+ case SyncPolarity::Negative:
+ flags |= DRM_MODE_FLAG_NVSYNC;
+ break;
+ default:
+ break;
+ }
+}
+
+Videomode videomode_from_timings(uint32_t clock_khz,
+ uint16_t hact, uint16_t hfp, uint16_t hsw, uint16_t hbp,
+ uint16_t vact, uint16_t vfp, uint16_t vsw, uint16_t vbp)
+{
+ Videomode m { };
+ m.clock = clock_khz;
+
+ m.hdisplay = hact;
+ m.hsync_start = hact + hfp;
+ m.hsync_end = hact + hfp + hsw;
+ m.htotal = hact + hfp + hsw + hbp;
+
+ m.vdisplay = vact;
+ m.vsync_start = vact + vfp;
+ m.vsync_end = vact + vfp + vsw;
+ m.vtotal = vact + vfp + vsw + vbp;
+
+ return m;
}
}