[haiku-bugs] Re: [Haiku] #8457: Blank screen after boot on Radeon Mobility 4670 HD
- From: "kvark" <trac@xxxxxxxxxxxx>
- Date: Mon, 01 Jul 2013 17:34:16 -0000
#8457: Blank screen after boot on Radeon Mobility 4670 HD
------------------------------------------+----------------------------
Reporter: kvark | Owner: kallisti5
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: Drivers/Graphics/radeon_hd | Version: R1/Development
Resolution: | Keywords: blank radeon
Blocked By: | Blocking: 7662
Has a Patch: 0 | Platform: x86
------------------------------------------+----------------------------
Comment (by kvark):
LCDPANEL_CAP_READ_EDID seems like it would be the answer, though the
AtomBIOS dump shows ucLCDPanel_SpecialHandlingCap to be 0 :(
{{{
-//Definitions for ucLCDPanel_SpecialHandlingCap:
-
-//Once DAL sees this CAP is set, it will read EDID from LCD on its own
instead of using sLCDTiming in ATOM_LVDS_INFO_V12.
-//Other entries in ATOM_LVDS_INFO_V12 are still valid/useful to DAL
-#define LCDPANEL_CAP_READ_EDID 0x1
-
-//If a design supports DRR (dynamic refresh rate) on internal panels
(LVDS or EDP), this cap is set in ucLCDPanel_SpecialHandlingCap together
-//with multiple supported refresh rates@usSupportedRefreshRate. This cap
should not be set when only slow refresh rate is supported (static
-//refresh rate switch by SW. This is only valid from ATOM_LVDS_INFO_V12
-#define LCDPANEL_CAP_DRR_SUPPORTED 0x2
-
-//Use this cap bit for a quick reference whether an embadded panel (LCD1
) is LVDS or eDP.
-#define LCDPANEL_CAP_eDP 0x4
}}}
--
Ticket URL: <http://dev.haiku-os.org/ticket/8457#comment:29>
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