From f925c13c0125b9d8159116c9b41bb01d2702bf5f Mon Sep 17 00:00:00 2001 From: Laszlo Agocs Date: Fri, 13 Mar 2015 11:47:25 +0100 Subject: eglfs: Report the QScreen refresh rate from eglfs For KMS we can always know the correct rate so report it from the backend's custom screen implementation. For the rest, query from the framebuffer. If the fb driver publishes the timings then we can calculate the vertical refresh rate from them. If not, default to 60. Task-number: QTBUG-44971 Change-Id: I854a34e7c0d652790cc2ac967715828ec76f5733 Reviewed-by: Andy Nichols --- .../eglconvenience/qeglconvenience.cpp | 27 ++++++++++++++++++++++ .../eglconvenience/qeglconvenience_p.h | 1 + 2 files changed, 28 insertions(+) (limited to 'src/platformsupport') diff --git a/src/platformsupport/eglconvenience/qeglconvenience.cpp b/src/platformsupport/eglconvenience/qeglconvenience.cpp index 011e2c2961..922455c96f 100644 --- a/src/platformsupport/eglconvenience/qeglconvenience.cpp +++ b/src/platformsupport/eglconvenience/qeglconvenience.cpp @@ -576,6 +576,33 @@ int q_screenDepthFromFb(int framebufferDevice) return depth; } +qreal q_refreshRateFromFb(int framebufferDevice) +{ + static qreal rate = 0; + +#ifdef Q_OS_LINUX + if (rate == 0) { + if (framebufferDevice != -1) { + struct fb_var_screeninfo vinfo; + if (ioctl(framebufferDevice, FBIOGET_VSCREENINFO, &vinfo) != -1) { + const quint64 quot = quint64(vinfo.left_margin + vinfo.right_margin + vinfo.xres + vinfo.hsync_len) + * quint64(vinfo.upper_margin + vinfo.lower_margin + vinfo.yres + vinfo.vsync_len) + * vinfo.pixclock; + if (quot) + rate = 1000000000000LLU / quot; + } else { + qWarning("eglconvenience: Could not query screen info"); + } + } + } +#endif + + if (rate == 0) + rate = 60; + + return rate; +} + #endif // Q_OS_UNIX QT_END_NAMESPACE diff --git a/src/platformsupport/eglconvenience/qeglconvenience_p.h b/src/platformsupport/eglconvenience/qeglconvenience_p.h index 1d35545430..59441d8c9a 100644 --- a/src/platformsupport/eglconvenience/qeglconvenience_p.h +++ b/src/platformsupport/eglconvenience/qeglconvenience_p.h @@ -63,6 +63,7 @@ void q_printEglConfig(EGLDisplay display, EGLConfig config); QSizeF q_physicalScreenSizeFromFb(int framebufferDevice, const QSize &screenSize = QSize()); QSize q_screenSizeFromFb(int framebufferDevice); int q_screenDepthFromFb(int framebufferDevice); +qreal q_refreshRateFromFb(int framebufferDevice); #endif class QEglConfigChooser -- cgit v1.2.3