Commit e5d464d0 authored by Radhakrishna Sripada's avatar Radhakrishna Sripada
Browse files

drm/i915/mtl: Add gmbus and gpio support 



Add tables to map the GMBUS pin pairs to GPIO registers and port to DDC.
From spec we have registers GPIO_CTL[1-5] mapped to native display phys and
GPIO_CTL[9-12] are mapped to TC ports.

v2:
 - Drop unused GPIO pins(MattR)

BSpec: 49306

Cc: Matt Roper <matthew.d.roper@intel.com>
Original Author: Brian J Lovin
Signed-off-by: default avatarRadhakrishna Sripada <radhakrishna.sripada@intel.com>
Reviewed-by: default avatarBalasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Reviewed-by: default avatarMatt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220902060342.151824-6-radhakrishna.sripada@intel.com
parent f9e932a8

drivers/gpu/drm/i915/display/intel_gmbus.c

+15 −0
Original line number Diff line number Diff line
@@ -117,6 +117,18 @@ static const struct gmbus_pin gmbus_pins_dg2[] = { 
	[GMBUS_PIN_9_TC1_ICP] = { "tc1", GPIOJ },

};



static const struct gmbus_pin gmbus_pins_mtp[] = {

	[GMBUS_PIN_1_BXT] = { "dpa", GPIOB },

	[GMBUS_PIN_2_BXT] = { "dpb", GPIOC },

	[GMBUS_PIN_3_BXT] = { "dpc", GPIOD },

	[GMBUS_PIN_4_CNP] = { "dpd", GPIOE },

	[GMBUS_PIN_5_MTP] = { "dpe", GPIOF },

	[GMBUS_PIN_9_TC1_ICP] = { "tc1", GPIOJ },

	[GMBUS_PIN_10_TC2_ICP] = { "tc2", GPIOK },

	[GMBUS_PIN_11_TC3_ICP] = { "tc3", GPIOL },

	[GMBUS_PIN_12_TC4_ICP] = { "tc4", GPIOM },

};



static const struct gmbus_pin *get_gmbus_pin(struct drm_i915_private *i915,

					     unsigned int pin)

{
@@ -129,6 +141,9 @@ static const struct gmbus_pin *get_gmbus_pin(struct drm_i915_private *i915, 
	} else if (INTEL_PCH_TYPE(i915) >= PCH_DG1) {

		pins = gmbus_pins_dg1;

		size = ARRAY_SIZE(gmbus_pins_dg1);

	} else if (INTEL_PCH_TYPE(i915) >= PCH_MTP) {

		pins = gmbus_pins_mtp;

		size = ARRAY_SIZE(gmbus_pins_mtp);

	} else if (INTEL_PCH_TYPE(i915) >= PCH_ICP) {

		pins = gmbus_pins_icp;

		size = ARRAY_SIZE(gmbus_pins_icp);

drivers/gpu/drm/i915/display/intel_gmbus.h

+1 −0
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ struct i2c_adapter; 
#define GMBUS_PIN_2_BXT		2

#define GMBUS_PIN_3_BXT		3

#define GMBUS_PIN_4_CNP		4

#define GMBUS_PIN_5_MTP		5

#define GMBUS_PIN_9_TC1_ICP	9

#define GMBUS_PIN_10_TC2_ICP	10

#define GMBUS_PIN_11_TC3_ICP	11