[haiku-bugs] [Haiku] #8612: app_server needs to be multi-head aware
- From: "kallisti5" <trac@xxxxxxxxxxxx>
- Date: Tue, 29 May 2012 02:45:08 -0000
#8612: app_server needs to be multi-head aware
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Reporter: kallisti5 | Owner: axeld
Type: enhancement | Status: new
Priority: low | Milestone:
Component: Servers/app_server | Unscheduled
Keywords: multiple display, multiple crtc, | Version:
multihead, multi-head | R1/Development
Blocking: | Blocked By:
Platform: All | Has a Patch: 0
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Multiple monitors beyond the hacked together radeon driver will not
function due to hooks missing important information such as "which display
does this effect"
Each monitor is considered a crt controller (crtc)
The following hooks need a multi-monitor parameter (ex: uint8 display):
* B_ACCELERANT_MODE_COUNT
* B_GET_EDID_INFO
* B_GET_MODE_LIST
* B_GET_PREFERRED_DISPLAY_MODE
* B_GET_DISPLAY_MODE
* B_SET_DISPLAY_MODE (not *required* as we could just set the recommended
mode stored in the accelerant on all displays)
* is_mode_supported callback in "create_display_modes"
New hooks may be needed to specify:
* Get number of displays... B_GET_DISPLAY_COUNT?
Other hooks may include:
* Monitor hotplug events (reversed from accelerant -> app_server)
radeon_hd stores multiple monitors internally and shows that making the
app_server as unaware of multiple heads is almost possible except for the
cases above where we need guidance.
This is definitely a post-R1 enhancement as it would break binary
compatibility with existing Be drivers and would be a big task introducing
potential bugs.
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Ticket URL: <http://dev.haiku-os.org/ticket/8612>
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