Hi all,
I went bit more through the code, looks overall very good! Thanks AMD!
Before we start the porting efforts here is the list of stuff needs to be done.
Is there anyone with spare time?
1) move fadt.c into sb700 directory
2) split ACPI dsl into smaller chunks, similar as we have for ICH7/945
3) Check why resourcemap.c is needed. The only change from default is change for maximum bus number settings which is set to 8. Not sure if we really need any limit here?
4) some DSDT methods are doing checks for Linux and do something with AC97 codec, I think it does not work anyway because Linux tells it is Windows to ACPI :) Some DSDT values should be generated using ACPIgen namely HPET and something else I forgot already. The ITE code should go to separate file, the _PTS method is doing something to SMI, which we don't want because we dont have any SMI trap handler.
5) The GFX reset stuff
The Mahagony board has separate GFX reset GPIO because some PCIe 16x are shared with displayport. I think this has to be checked for each board if such GPIO reset is needed.
6) GPIO for IDE cable This is also board dependent and must be find out.
7) PCIe lanes setup. The RS780 has very flexible setup for PCIe lanes, some for them can be multiplexed for Display Port, some for HDMI etc... There is something written in the DS of RS780 but it is hard to understand that how it suppose to work.
#Define gpp_configuration, A=0, B=1, C=2, D=3, E=4(default) #Define port_enable, (bit map): GFX(2,3), GPP(4,5,6,7) #Define gfx_dev2_dev3, 0: a link will never be established on Dev2 or Dev3, # 1: the system allows a PCIE link to be established on Dev2 or Dev3. #Define gfx_dual_slot, 0: single slot, 1: dual slot #Define gfx_lane_reversal, 0: disable lane reversal, 1: enable #Define gfx_tmds, 0: didn't support TMDS, 1: support #Define gfx_compliance, 0: didn't support compliance, 1: support #Define gfx_reconfiguration, 0: short reconfiguration, 1(default): long reconfiguration #Define gfx_link_width, 0: x16, 1: x1, 2: x2, 3: x4, 4: x8, 5: x12 (not supported), 6: x16
Each board can setup this differently, gpp_configuration = 0 means read it from STRAP which is good because we dont have to set it up.
Is dual_slot - crossfire?
Does TMDS here means DVI/HDMI?
I try to get more ideas how this is supposed to work, maybe AMD folks can also help ;)
Rudolf