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drm/i915/icl: Work around broken VBTs for port F detection

Browse source 
VBT may include incorrect information about the presence of port F. Work
around this on SKUs where we know the port is not present.

v2:
- Fix IS_ICL_WITH_PORT_F, so it's useable from any context.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108915
Cc: Mika Kahola <[email protected]>
Cc: Jani Nikula <[email protected]>
Signed-off-by: Imre Deak <[email protected]>
Reviewed-by: Dhinakaran Pandiyan <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
This commit is contained in:
Imre Deak 2018-12-20 17:52:11 +02:00
commit 2b34e56236
2 changed files with 5 additions and 1 deletions
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2
drivers/gpu/drm/i915/i915_drv.h
View file

@ -2353,6 +2353,8 @@ static inline unsigned int i915_sg_segment_size(void)
INTEL_INFO(dev_priv)->gt == 3)
#define IS_CNL_WITH_PORT_F(dev_priv) (IS_CANNONLAKE(dev_priv) && \
(INTEL_DEVID(dev_priv) & 0x0004) == 0x0004)
#define IS_ICL_WITH_PORT_F(dev_priv) (IS_ICELAKE(dev_priv) && \
INTEL_DEVID(dev_priv) != 0x8A51)
#define IS_ALPHA_SUPPORT(intel_info) ((intel_info)->is_alpha_support)

4
drivers/gpu/drm/i915/intel_display.c
View file

@ -14376,8 +14376,10 @@ static void intel_setup_outputs(struct drm_i915_private *dev_priv)
/*
* On some ICL SKUs port F is not present. No strap bits for
* this, so rely on VBT.
* Work around broken VBTs on SKUs known to have no port F.
*/
if (intel_bios_is_port_present(dev_priv, PORT_F))
if (IS_ICL_WITH_PORT_F(dev_priv) &&
intel_bios_is_port_present(dev_priv, PORT_F))
intel_ddi_init(dev_priv, PORT_F);
icl_dsi_init(dev_priv);