diff options
| author | Shubhangi Shrivastava <shubhangi.shrivastava@intel.com> | 2016-03-31 13:41:47 +0300 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2016-04-06 14:22:48 +0300 |
| commit | d252bf68b75792108ae2821c3a6e1cdc58e88cb9 (patch) | |
| tree | 9ab7307ec317858af544fc984265af7fc639a99f /drivers/gpu/drm/i915/i915_irq.c | |
| parent | 4e27bd50739e41250a93dd131d6a4180e288cb10 (diff) | |
| download | linux-d252bf68b75792108ae2821c3a6e1cdc58e88cb9.tar.xz | |
drm/i915: Set invert bit for hpd based on VBT
This patch sets the invert bit for hpd detection for each port
based on VBT configuration. Since each AOB can be designed to
depend on invert bit or not, it is expected if an AOB requires
invert bit, the user will set respective bit in VBT.
v2: Separated VBT parsing from the rest of the logic. (Jani)
v3: Moved setting invert bit logic to bxt_hpd_irq_setup()
and changed its logic to avoid looping twice. (Ville)
v4: Changed the logic to mask out the bits first and then
set them to remove need of temporary variable. (Ville)
v5: Moved defines to existing set of defines for the register
and added required breaks. (Ville)
Signed-off-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: Durgadoss R <durgadoss.r@intel.com>
Signed-off-by: Shubhangi Shrivastava <shubhangi.shrivastava@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[Jani: fixed some checkpatch noise, added kernel-doc.]
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459420907-11383-2-git-send-email-shubhangi.shrivastava@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/i915_irq.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index c85eb8dec2dc..5bec13844800 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -3500,6 +3500,26 @@ static void bxt_hpd_irq_setup(struct drm_device *dev) hotplug = I915_READ(PCH_PORT_HOTPLUG); hotplug |= PORTC_HOTPLUG_ENABLE | PORTB_HOTPLUG_ENABLE | PORTA_HOTPLUG_ENABLE; + + DRM_DEBUG_KMS("Invert bit setting: hp_ctl:%x hp_port:%x\n", + hotplug, enabled_irqs); + hotplug &= ~BXT_DDI_HPD_INVERT_MASK; + + /* + * For BXT invert bit has to be set based on AOB design + * for HPD detection logic, update it based on VBT fields. + */ + + if ((enabled_irqs & BXT_DE_PORT_HP_DDIA) && + intel_bios_is_port_hpd_inverted(dev_priv, PORT_A)) + hotplug |= BXT_DDIA_HPD_INVERT; + if ((enabled_irqs & BXT_DE_PORT_HP_DDIB) && + intel_bios_is_port_hpd_inverted(dev_priv, PORT_B)) + hotplug |= BXT_DDIB_HPD_INVERT; + if ((enabled_irqs & BXT_DE_PORT_HP_DDIC) && + intel_bios_is_port_hpd_inverted(dev_priv, PORT_C)) + hotplug |= BXT_DDIC_HPD_INVERT; + I915_WRITE(PCH_PORT_HOTPLUG, hotplug); } |