diff options
author | Kurt Kiefer <kekiefer@gmail.com> | 2023-09-14 09:25:50 -0700 |
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committer | Kurt Kiefer <kekiefer@gmail.com> | 2023-10-03 08:47:42 -0700 |
commit | 17a68dae5e9007d9a8b122b4ede1647d5900d6d4 (patch) | |
tree | 34dfc478ad113f41fe1e60883814bef3064b1d6c /src/plugins/platforms/eglfs | |
parent | 8419b56097bd08e0c5d07b47ccd149f2d19a9d24 (diff) |
eglfs: add a default framebuffer to NVIDIA eglstreams
Newer versions of NVIDIA's DRM driver are rejecting the previously
accepted but non-standard use of framebuffer_id -1 in order to set
the output mode but not issue a page flip.
This change adds a default framebuffer to the egldevice driver for
use with the initial calls to set the CRTC mode and plane.
Pick-to: 6.6 6.5
Change-Id: I63dbb6b099250fcff7d995eec38fb75c675894cd
Reviewed-by: Samuli Piippo <samuli.piippo@qt.io>
Diffstat (limited to 'src/plugins/platforms/eglfs')
2 files changed, 61 insertions, 4 deletions
diff --git a/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms_egldevice/qeglfskmsegldevicescreen.cpp b/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms_egldevice/qeglfskmsegldevicescreen.cpp index d4e5f2f90c..3fc46cd224 100644 --- a/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms_egldevice/qeglfskmsegldevicescreen.cpp +++ b/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms_egldevice/qeglfskmsegldevicescreen.cpp @@ -13,11 +13,62 @@ Q_DECLARE_LOGGING_CATEGORY(qLcEglfsKmsDebug) QEglFSKmsEglDeviceScreen::QEglFSKmsEglDeviceScreen(QEglFSKmsDevice *device, const QKmsOutput &output) : QEglFSKmsScreen(device, output) + , m_default_fb_handle(uint32_t(-1)) + , m_default_fb_id(uint32_t(-1)) { + const int fd = device->fd(); + + struct drm_mode_create_dumb createRequest; + createRequest.width = output.size.width(); + createRequest.height = output.size.height(); + createRequest.bpp = 32; + createRequest.flags = 0; + + qCDebug(qLcEglfsKmsDebug, "Creating dumb fb %dx%d", createRequest.width, createRequest.height); + + int ret = drmIoctl(fd, DRM_IOCTL_MODE_CREATE_DUMB, &createRequest); + if (ret < 0) + qFatal("Unable to create dumb buffer.\n"); + + m_default_fb_handle = createRequest.handle; + + uint32_t handles[4] = { 0, 0, 0, 0 }; + uint32_t pitches[4] = { 0, 0, 0, 0 }; + uint32_t offsets[4] = { 0, 0, 0, 0 }; + + handles[0] = createRequest.handle; + pitches[0] = createRequest.pitch; + offsets[0] = 0; + + ret = drmModeAddFB2(fd, createRequest.width, createRequest.height, DRM_FORMAT_ARGB8888, handles, + pitches, offsets, &m_default_fb_id, 0); + if (ret) + qFatal("Unable to add fb\n"); + + qCDebug(qLcEglfsKmsDebug, "Added dumb fb %dx%d handle:%u pitch:%d id:%u", createRequest.width, createRequest.height, + createRequest.handle, createRequest.pitch, m_default_fb_id); } QEglFSKmsEglDeviceScreen::~QEglFSKmsEglDeviceScreen() { + int ret; + const int fd = device()->fd(); + + if (m_default_fb_id != uint32_t(-1)) { + ret = drmModeRmFB(fd, m_default_fb_id); + if (ret) + qErrnoWarning("drmModeRmFB failed"); + } + + if (m_default_fb_handle != uint32_t(-1)) { + struct drm_mode_destroy_dumb destroyRequest; + destroyRequest.handle = m_default_fb_handle; + + ret = drmIoctl(fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroyRequest); + if (ret) + qErrnoWarning("DRM_IOCTL_MODE_DESTROY_DUMB failed"); + } + const int remainingScreenCount = qGuiApp->screens().size(); qCDebug(qLcEglfsKmsDebug, "Screen dtor. Remaining screens: %d", remainingScreenCount); if (!remainingScreenCount && !device()->screenConfig()->separateScreens()) @@ -53,8 +104,11 @@ void QEglFSKmsEglDeviceScreen::waitForFlip() if (alreadySet) { // Maybe detecting the DPMS mode could help here, but there are no properties // exposed on the connector apparently. So rely on an env var for now. - static bool alwaysDoSet = qEnvironmentVariableIntValue("QT_QPA_EGLFS_ALWAYS_SET_MODE"); - if (!alwaysDoSet) { + // Note that typically, we need to set crtc with the default fb even if the + // mode did not change, unless QT_QPA_EGLFS_ALWAYS_SET_MODE is explicitly specified. + static bool envVarSet = false; + static bool alwaysDoSet = qEnvironmentVariableIntValue("QT_QPA_EGLFS_ALWAYS_SET_MODE", &envVarSet); + if (envVarSet && !alwaysDoSet) { qCDebug(qLcEglfsKmsDebug, "Mode already set"); return; } @@ -62,7 +116,7 @@ void QEglFSKmsEglDeviceScreen::waitForFlip() qCDebug(qLcEglfsKmsDebug, "Setting mode"); int ret = drmModeSetCrtc(fd, op.crtc_id, - uint32_t(-1), 0, 0, + m_default_fb_id, 0, 0, &op.connector_id, 1, &op.modes[op.mode]); if (ret) @@ -74,7 +128,7 @@ void QEglFSKmsEglDeviceScreen::waitForFlip() if (op.wants_forced_plane) { qCDebug(qLcEglfsKmsDebug, "Setting plane %u", op.forced_plane_id); - int ret = drmModeSetPlane(fd, op.forced_plane_id, op.crtc_id, uint32_t(-1), 0, + int ret = drmModeSetPlane(fd, op.forced_plane_id, op.crtc_id, m_default_fb_id, 0, 0, 0, w, h, 0 << 16, 0 << 16, op.size.width() << 16, op.size.height() << 16); if (ret == -1) diff --git a/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms_egldevice/qeglfskmsegldevicescreen.h b/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms_egldevice/qeglfskmsegldevicescreen.h index 884a70093a..8779499bef 100644 --- a/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms_egldevice/qeglfskmsegldevicescreen.h +++ b/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms_egldevice/qeglfskmsegldevicescreen.h @@ -17,6 +17,9 @@ public: QPlatformCursor *cursor() const override; void waitForFlip() override; +private: + uint32_t m_default_fb_handle; + uint32_t m_default_fb_id; }; QT_END_NAMESPACE |