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 Signed-off-by: Shashank Sharma <[email protected]> --- drivers/gpu/drm/i915/i915_drv.h | 3 +++ drivers/gpu/drm/i915/intel_bios.c | 49 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 52 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 25ebe46..3719b81 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -3671,6 +3671,9 @@ 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 diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c index da5ed4a..2b00c89 100644 --- a/drivers/gpu/drm/i915/intel_bios.c +++ b/drivers/gpu/drm/i915/intel_bios.c @@ -1759,3 +1759,52 @@ 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 (WARN_ON_ONCE(!IS_GEN9(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; +} -- 1.9.1 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
