We currently assume port A is connected to a DP sink when VBT is absent,
instead assume it is connected to an eDP sink, which seems like a more common
configuration. Although I don't have data to back this up, it is still just as
valid as asumming port A is not eDP. This reverts to the behavior before
a98d9c1 ("drm/i915/ddi: Rely on VBT DDI port info for eDP detection") except
only when there is no VBT. Knowing whether a panel is eDP or not from the panel
itself would have been nicer, but I cannot find any DPCD registers that provide
this reliably.
Cc: Jani Nikula <[email protected]>
Cc: Imre Deak <[email protected]>
Cc: Rodrigo Vivi <[email protected]>
Cc: Clint Taylor <[email protected]>
Signed-off-by: Dhinakaran Pandiyan <[email protected]>
Is this patch trying to fix a specific bug? Where do you plan to use
supports_edp flag?
I guess I am trying to understand the need for this in the vbt missing defaults
and what this patch is trying to solve here.
Manasi
---
drivers/gpu/drm/i915/intel_bios.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/i915/intel_bios.c
b/drivers/gpu/drm/i915/intel_bios.c
index 82b144c..89a405e 100644
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -1403,6 +1403,7 @@ init_vbt_missing_defaults(struct drm_i915_private
*dev_priv)
info->supports_dvi = (port != PORT_A && port != PORT_E);
info->supports_hdmi = info->supports_dvi;
info->supports_dp = (port != PORT_E);
+ info->supports_edp = (port == PORT_A);
}
}
--
2.7.4
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