From d252bf68b75792108ae2821c3a6e1cdc58e88cb9 Mon Sep 17 00:00:00 2001 From: Shubhangi Shrivastava Date: Thu, 31 Mar 2016 16:11:47 +0530 Subject: [PATCH] drm/i915: Set invert bit for hpd based on VBT MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Durgadoss R Signed-off-by: Shubhangi Shrivastava Reviewed-by: Ville Syrjälä [Jani: fixed some checkpatch noise, added kernel-doc.] Signed-off-by: Jani Nikula Link: http://patchwork.freedesktop.org/patch/msgid/1459420907-11383-2-git-send-email-shubhangi.shrivastava@intel.com --- drivers/gpu/drm/i915/i915_drv.h | 2 ++ drivers/gpu/drm/i915/i915_irq.c | 20 ++++++++++++++ drivers/gpu/drm/i915/i915_reg.h | 6 +++++ drivers/gpu/drm/i915/intel_bios.c | 44 +++++++++++++++++++++++++++++++ 4 files changed, 72 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 313bc3576d87..a1f78f275c55 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -3408,6 +3408,8 @@ bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv); bool intel_bios_is_lvds_present(struct drm_i915_private *dev_priv, u8 *i2c_pin); bool intel_bios_is_port_edp(struct drm_i915_private *dev_priv, enum port port); bool intel_bios_is_dsi_present(struct drm_i915_private *dev_priv, enum port *port); +bool intel_bios_is_port_hpd_inverted(struct drm_i915_private *dev_priv, + enum port port); /* intel_opregion.c */ #ifdef CONFIG_ACPI 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); } diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 17603ada78ea..0744759170d3 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -6196,6 +6196,7 @@ enum skl_disp_power_wells { /* digital port hotplug */ #define PCH_PORT_HOTPLUG _MMIO(0xc4030) /* SHOTPLUG_CTL */ #define PORTA_HOTPLUG_ENABLE (1 << 28) /* LPT:LP+ & BXT */ +#define BXT_DDIA_HPD_INVERT (1 << 27) #define PORTA_HOTPLUG_STATUS_MASK (3 << 24) /* SPT+ & BXT */ #define PORTA_HOTPLUG_NO_DETECT (0 << 24) /* SPT+ & BXT */ #define PORTA_HOTPLUG_SHORT_DETECT (1 << 24) /* SPT+ & BXT */ @@ -6211,6 +6212,7 @@ enum skl_disp_power_wells { #define PORTD_HOTPLUG_SHORT_DETECT (1 << 16) #define PORTD_HOTPLUG_LONG_DETECT (2 << 16) #define PORTC_HOTPLUG_ENABLE (1 << 12) +#define BXT_DDIC_HPD_INVERT (1 << 11) #define PORTC_PULSE_DURATION_2ms (0 << 10) /* pre-LPT */ #define PORTC_PULSE_DURATION_4_5ms (1 << 10) /* pre-LPT */ #define PORTC_PULSE_DURATION_6ms (2 << 10) /* pre-LPT */ @@ -6221,6 +6223,7 @@ enum skl_disp_power_wells { #define PORTC_HOTPLUG_SHORT_DETECT (1 << 8) #define PORTC_HOTPLUG_LONG_DETECT (2 << 8) #define PORTB_HOTPLUG_ENABLE (1 << 4) +#define BXT_DDIB_HPD_INVERT (1 << 3) #define PORTB_PULSE_DURATION_2ms (0 << 2) /* pre-LPT */ #define PORTB_PULSE_DURATION_4_5ms (1 << 2) /* pre-LPT */ #define PORTB_PULSE_DURATION_6ms (2 << 2) /* pre-LPT */ @@ -6230,6 +6233,9 @@ enum skl_disp_power_wells { #define PORTB_HOTPLUG_NO_DETECT (0 << 0) #define PORTB_HOTPLUG_SHORT_DETECT (1 << 0) #define PORTB_HOTPLUG_LONG_DETECT (2 << 0) +#define BXT_DDI_HPD_INVERT_MASK (BXT_DDIA_HPD_INVERT | \ + BXT_DDIB_HPD_INVERT | \ + BXT_DDIC_HPD_INVERT) #define PCH_PORT_HOTPLUG2 _MMIO(0xc403C) /* SHOTPLUG_CTL2 SPT+ */ #define PORTE_HOTPLUG_ENABLE (1 << 4) diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c index 4222f52d95f8..eb756c41d9e1 100644 --- a/drivers/gpu/drm/i915/intel_bios.c +++ b/drivers/gpu/drm/i915/intel_bios.c @@ -1598,3 +1598,47 @@ bool intel_bios_is_dsi_present(struct drm_i915_private *dev_priv, return false; } + +/** + * intel_bios_is_port_hpd_inverted - is HPD inverted for %port + * @dev_priv: i915 device instance + * @port: port to check + * + * Return true if HPD should be inverted for %port. + */ +bool +intel_bios_is_port_hpd_inverted(struct drm_i915_private *dev_priv, + enum port port) +{ + int i; + + if (WARN_ON_ONCE(!IS_BROXTON(dev_priv))) + return false; + + for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { + if (!dev_priv->vbt.child_dev[i].common.hpd_invert) + continue; + + switch (dev_priv->vbt.child_dev[i].common.dvo_port) { + case DVO_PORT_DPA: + case DVO_PORT_HDMIA: + if (port == PORT_A) + return true; + break; + case DVO_PORT_DPB: + case DVO_PORT_HDMIB: + if (port == PORT_B) + return true; + break; + case DVO_PORT_DPC: + case DVO_PORT_HDMIC: + if (port == PORT_C) + return true; + break; + default: + break; + } + } + + return false; +} -- 2.20.1