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author | Laszlo Agocs <laszlo.agocs@qt.io> | 2016-08-04 10:29:29 +0200 |
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committer | Laszlo Agocs <laszlo.agocs@qt.io> | 2016-08-04 09:34:49 +0000 |
commit | dba1dc7d6b93b55b5b303b12e2f7549dc7c68ca2 (patch) | |
tree | d84ffd0553ffefb1fc2b5403aa4b3f965ec0b8e7 | |
parent | 103af0f07364c66e27e3e7b9dd2d7e3478f999e1 (diff) | |
download | qtdoc-dba1dc7d6b93b55b5b303b12e2f7549dc7c68ca2.tar.gz |
embedded: Add rpi output env var doc and reword the paragraph
Change-Id: Ibd1516d65dde9fcfaef102f7e1fa2ce1dba8b358
Reviewed-by: Topi Reiniƶ <topi.reinio@theqtcompany.com>
-rw-r--r-- | doc/src/platforms/emb-linux.qdoc | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/doc/src/platforms/emb-linux.qdoc b/doc/src/platforms/emb-linux.qdoc index dfe60142..75391493 100644 --- a/doc/src/platforms/emb-linux.qdoc +++ b/doc/src/platforms/emb-linux.qdoc @@ -552,13 +552,18 @@ \section2 eglfs with other backends - Other backends, that are typically based on targeting the framebuffer - directly via the vendor's EGL implementation, usually provides limited or - no support for multiple displays. In some cases the \c {QT_QPA_EGLFS_FB} - environment variable can be used to specify the framebuffer to target, - similarly to linuxfb. Alternatively, driver-specific environment variables or - kernel parameters may also be available to control the used framebuffer. Refer - to the embedded board's documentation. + Other backends, that are typically based on targeting the framebuffer or a + composition API directly via the vendor's EGL implementation, usually provide + limited or no support for multiple displays. On i.MX6-based boards with + Vivante GPUs the \c{QT_QPA_EGLFS_FB} environment variable can be used to + specify the framebuffer to target, similarly to linuxfb. On the Raspberry Pi + the \c{QT_QPA_EGLFS_DISPMANX_ID} environment variable can be used to specify + the screen to output to. The value corresponds to one of the \c{DISPMANX_ID_} + constants, refer to the Dispmanx documentation. Note that these approaches, + unlike KMS/DRM, will not typically allow to output to multiple screens from + the same application. Alternatively, driver-specific environment variables or + kernel parameters may also be available as well to control the used + framebuffer. Refer to the embedded board's documentation. \section2 Video Memory |