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drm/i915: Parse VBT data for lspcon

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Many GEN9 boards come with on-board lspcon cards.
Fot these boards, VBT configuration should properly point out
if a particular port contains lspcon device, so that driver can
initialize it properly.

This patch adds a utility function, which checks the VBT flag
for lspcon bit, and tells us if a port is configured to have a
lspcon device or not.

V2: Fixed review comments from Ville
- Do not forget PORT_D while checking lspcon for GEN9

V3: Addressed review comments from Rodrigo
- Create a HAS_LSPCON() macro for better use case handling.
- Do not dump warnings for non-gen-9 platforms, it will be noise.

V4: Rebase
V5: Rebase
V6: Pass dev_priv to HAS_LSPCON() macro

Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1476455212-27893-4-git-send-email-shashank.sharma@intel.com
This commit is contained in:
Shashank Sharma 2016-10-14 19:56:50 +05:30 committed by Jani Nikula
parent dbe9e61b8e
commit 6389dd8376
2 changed files with 54 additions and 0 deletions
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5
drivers/gpu/drm/i915/i915_drv.h
View File

@ -2862,6 +2862,8 @@ struct drm_i915_cmd_table {
#define HAS_GMCH_DISPLAY(dev_priv) ((dev_priv)->info.has_gmch_display)
#define HAS_LSPCON(dev_priv) (IS_GEN9(dev_priv))
/* DPF == dynamic parity feature */
#define HAS_L3_DPF(dev_priv) ((dev_priv)->info.has_l3_dpf)
#define NUM_L3_SLICES(dev_priv) (IS_HSW_GT3(dev_priv) ? \
@ -3629,6 +3631,9 @@ bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *dev_priv, enum por
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);
bool intel_bios_is_lspcon_present(struct drm_i915_private *dev_priv,
enum port port);
/* intel_opregion.c */
#ifdef CONFIG_ACPI

49
drivers/gpu/drm/i915/intel_bios.c
View File

@ -1763,3 +1763,52 @@ intel_bios_is_port_hpd_inverted(struct drm_i915_private *dev_priv,
return false;
}
/**
* intel_bios_is_lspcon_present - if LSPCON is attached on %port
* @dev_priv: i915 device instance
* @port: port to check
*
* Return true if LSPCON is present on this port
*/
bool
intel_bios_is_lspcon_present(struct drm_i915_private *dev_priv,
enum port port)
{
int i;
if (!HAS_LSPCON(dev_priv))
return false;
for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
if (!dev_priv->vbt.child_dev[i].common.lspcon)
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;
case DVO_PORT_DPD:
case DVO_PORT_HDMID:
if (port == PORT_D)
return true;
break;
default:
break;
}
}
return false;
}