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| author | Pavel Pisa <pisa@cmp.felk.cvut.cz> | 2016-07-31 13:10:28 +0200 |
|---|---|---|
| committer | Pavel Pisa <pisa@cmp.felk.cvut.cz> | 2016-07-31 13:10:28 +0200 |
| commit | 912a1a90ce2f40a56f174b4dac5716bb6951178d (patch) | |
| tree | 0ee56b1e93a5063e8b75410d73a5ea33c9016081 | |
| parent | arm/raspberrypi: VideoCore access corrections in cache operation and more err... (diff) | |
| download | rtems-912a1a90ce2f40a56f174b4dac5716bb6951178d.tar.bz2 | |
arm/raspberrypi: framebuffer driver checks for initialization and tries runtime init if required.
Code works but there is problem how to setup caching for the regions
(arm_cp15_set_translation_table_entries arguments).
If ARMV7_MMU_DATA_READ_WRITE_CACHED is used then CPU
accesses are noncoherent with VideoCore and some
part of image update are not visible until pushed from
cache by other activities. If ARMV7_MMU_DATA_READ_WRITE
is used then access is extremely slow.
Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
| -rw-r--r-- | c/src/lib/libbsp/arm/raspberrypi/console/fb.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/c/src/lib/libbsp/arm/raspberrypi/console/fb.c b/c/src/lib/libbsp/arm/raspberrypi/console/fb.c index 1900a06eab..815d17e8ca 100644 --- a/c/src/lib/libbsp/arm/raspberrypi/console/fb.c +++ b/c/src/lib/libbsp/arm/raspberrypi/console/fb.c @@ -319,10 +319,20 @@ rtems_device_driver frame_buffer_open( { if ( _Atomic_Flag_test_and_set( &driver_mutex, ATOMIC_ORDER_ACQUIRE ) != 0 ) { - printk( "FB_CIRRUS could not lock driver_mutex\n" ); + printk( "RaspberryPi framebuffer could not lock driver_mutex\n" ); return RTEMS_UNSATISFIED; } + if ( fb_fix_info.smem_start == NULL ) { + int res; + res = rpi_fb_init(); + if ( (res < RPI_FB_INIT_OK) || (fb_fix_info.smem_start == NULL) ) { + _Atomic_Flag_clear( &driver_mutex, ATOMIC_ORDER_RELEASE ); + printk( "RaspberryPi framebuffer initialization failed\n" ); + return RTEMS_UNSATISFIED; + } + } + memset( (void *) fb_fix_info.smem_start, 0, fb_fix_info.smem_len ); return RTEMS_SUCCESSFUL; } |