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Commit 6389dd83 authored by Shashank Sharma's avatar Shashank Sharma Committed by Jani Nikula
Browse files

drm/i915: Parse VBT data for lspcon 



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: default avatarShashank Sharma <shashank.sharma@intel.com>
Reviewed-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1476455212-27893-4-git-send-email-shashank.sharma@intel.com
parent dbe9e61b

drivers/gpu/drm/i915/i915_drv.h

+5 −0
Original line number Diff line number Diff line
@@ -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

drivers/gpu/drm/i915/intel_bios.c

+49 −0
Original line number Diff line number Diff line
@@ -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;

}