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drivers/intel/mipi_camera: Add support to handle CIO2 device 

This change updates mipi_camera driver to handle CIO2 device type.

Change-Id: I521740524bc1c4da3d8593f011a033542e4a872c
Signed-off-by: Sugnan Prabhu S <sugnan.prabhu.s@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42470
Reviewed-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Matt Delco 2020-06-17 13:10:22 +05:30 committed by Patrick Georgi
parent 1ffee9d7f1
commit 879b3c195f
2 changed files with 124 additions and 3 deletions
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121
src/drivers/intel/mipi_camera/camera.c
View File

@ -1,5 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#include <stdlib.h>
#include <acpi/acpi.h>
#include <acpi/acpi_device.h>
#include <acpi/acpigen.h>
@ -13,6 +14,82 @@
#define SENSOR_NAME_UUID "822ace8f-2814-4174-a56b-5f029fe079ee"
#define SENSOR_TYPE_UUID "26257549-9271-4ca4-bb43-c4899d5a4881"
#define DEFAULT_ENDPOINT 0
#define DEFAULT_REMOTE_NAME "\\_SB.PCI0.CIO2"
#define CIO2_PCI_DEV 0x14
#define CIO2_PCI_FN 0x3
/*
* This implementation assumes there is only 1 endpoint at each end of every data port. It also
* assumes there are no clock lanes. It also assumes that any VCM or NVM for a CAM is on the
* same I2C bus as the CAM.
*/
/*
* Adds settings for a CIO2 device (typically at "\_SB.PCI0.CIO2"). A _DSD is added that
* specifies a child table for each port (e.g., PRT0 for "port0" and PRT1 for "port1"). Each
* PRTx table specifies a table for each endpoint (though only 1 endpoint is supported by this
* implementation so the table only has an "endpoint0" that points to a EPx0 table). The EPx0
* table primarily describes the # of lanes in "data-lines" and specifies the name of the other
* side in "remote-endpoint" (the name is usually of the form "\_SB.PCI0.I2Cx.CAM0" for the
* first port/cam and "\_SB.PCI0.I2Cx.CAM1" if there's a second port/cam).
*/
static void camera_fill_cio2(const struct device *dev)
{
struct drivers_intel_mipi_camera_config *config = dev->chip_info;
struct acpi_dp *dsd = acpi_dp_new_table("_DSD");
char *ep_table_name[MAX_PORT_ENTRIES] = {NULL};
char *port_table_name[MAX_PORT_ENTRIES] = {NULL};
char *port_name[MAX_PORT_ENTRIES] = {NULL};
unsigned int i, j;
char name[BUS_PATH_MAX];
struct acpi_dp *ep_table = NULL;
struct acpi_dp *port_table = NULL;
struct acpi_dp *remote = NULL;
struct acpi_dp *lanes = NULL;
for (i = 0; i < config->cio2_num_ports && i < MAX_PORT_ENTRIES; ++i) {
snprintf(name, sizeof(name), "EP%u0", i);
ep_table_name[i] = strdup(name);
ep_table = acpi_dp_new_table(ep_table_name[i]);
acpi_dp_add_integer(ep_table, "endpoint", 0);
acpi_dp_add_integer(ep_table, "clock-lanes", 0);
if (config->cio2_lanes_used[i] > 0) {
lanes = acpi_dp_new_table("data-lanes");
for (j = 1; j <= config->cio2_lanes_used[i] &&
j <= MAX_PORT_ENTRIES; ++j)
acpi_dp_add_integer(lanes, NULL, j);
acpi_dp_add_array(ep_table, lanes);
}
if (config->cio2_lane_endpoint[i]) {
remote = acpi_dp_new_table("remote-endpoint");
acpi_dp_add_reference(remote, NULL, config->cio2_lane_endpoint[i]);
acpi_dp_add_integer(remote, NULL, 0);
acpi_dp_add_integer(remote, NULL, 0);
acpi_dp_add_array(ep_table, remote);
}
snprintf(name, sizeof(name), "PRT%u", i);
port_table_name[i] = strdup(name);
port_table = acpi_dp_new_table(port_table_name[i]);
acpi_dp_add_integer(port_table, "port", config->cio2_prt[i]);
acpi_dp_add_child(port_table, "endpoint0", ep_table);
snprintf(name, sizeof(name), "port%u", i);
port_name[i] = strdup(name);
acpi_dp_add_child(dsd, port_name[i], port_table);
}
acpi_dp_write(dsd);
for (i = 0; i < config->cio2_num_ports; ++i) {
free(ep_table_name[i]);
free(port_table_name[i]);
free(port_name[i]);
}
}
static void apply_pld_defaults(struct drivers_intel_mipi_camera_config *config)
{
@ -144,11 +221,17 @@ static void camera_generate_dsm(const struct device *dev)
acpigen_pop_len(); /* Method _DSM */
}
static void camera_fill_sensor_defaults(struct drivers_intel_mipi_camera_config *config)
static void camera_fill_ssdb_defaults(struct drivers_intel_mipi_camera_config *config)
{
struct device *cio2 = pcidev_on_root(CIO2_PCI_DEV, CIO2_PCI_FN);
struct drivers_intel_mipi_camera_config *cio2_config;
if (config->disable_ssdb_defaults)
return;
if (!config->ssdb.bdf_value)
config->ssdb.bdf_value = PCI_DEVFN(CIO2_PCI_DEV, CIO2_PCI_FN);
if (!config->ssdb.platform)
config->ssdb.platform = PLATFORM_SKC;
@ -163,6 +246,24 @@ static void camera_fill_sensor_defaults(struct drivers_intel_mipi_camera_config
if (!config->ssdb.mclk_speed)
config->ssdb.mclk_speed = CLK_FREQ_19_2MHZ;
if (!config->ssdb.lanes_used) {
cio2_config = cio2 ? cio2->chip_info : NULL;
if (!cio2_config) {
printk(BIOS_ERR, "Failed to get CIO2 config\n");
} else if (cio2_config->device_type != INTEL_ACPI_CAMERA_CIO2) {
printk(BIOS_ERR, "Device type isn't CIO2: %u\n",
(u32)cio2_config->device_type);
} else if (config->ssdb.link_used >= cio2_config->cio2_num_ports) {
printk(BIOS_ERR, "%u exceeds CIO2's %u links\n",
(u32)config->ssdb.link_used,
(u32)cio2_config->cio2_num_ports);
} else {
config->ssdb.lanes_used =
cio2_config->cio2_lanes_used[config->ssdb.link_used];
}
}
}
/*
@ -193,10 +294,12 @@ static void camera_fill_sensor(const struct device *dev)
struct acpi_dp *remote = NULL;
const char *vcm_name = NULL;
struct acpi_dp *lens_focus = NULL;
const char *remote_name;
struct device *cio2 = pcidev_on_root(CIO2_PCI_DEV, CIO2_PCI_FN);
camera_generate_pld(dev);
camera_fill_sensor_defaults(config);
camera_fill_ssdb_defaults(config);
/* _DSM */
camera_generate_dsm(dev);
@ -223,7 +326,16 @@ static void camera_fill_sensor(const struct device *dev)
remote = acpi_dp_new_table("remote-endpoint");
acpi_dp_add_reference(remote, NULL, config->remote_name);
if (config->remote_name) {
remote_name = config->remote_name;
} else {
if (cio2)
remote_name = acpi_device_path(cio2);
else
remote_name = DEFAULT_REMOTE_NAME;
}
acpi_dp_add_reference(remote, NULL, remote_name);
acpi_dp_add_integer(remote, NULL, config->ssdb.link_used);
acpi_dp_add_integer(remote, NULL, DEFAULT_ENDPOINT);
acpi_dp_add_array(ep00, remote);
@ -408,6 +520,9 @@ static void write_camera_device_common(const struct device *dev)
}
switch (config->device_type) {
case INTEL_ACPI_CAMERA_CIO2:
camera_fill_cio2(dev);
break;
case INTEL_ACPI_CAMERA_SENSOR:
camera_fill_sensor(dev);
break;

6
src/drivers/intel/mipi_camera/chip.h
View File

@ -131,6 +131,12 @@ struct drivers_intel_mipi_camera_config {
const char *chip_name;
unsigned int acpi_uid;
/* Settings specific to CIO2 device */
uint32_t cio2_num_ports;
uint32_t cio2_lanes_used[MAX_PORT_ENTRIES];
const char *cio2_lane_endpoint[MAX_PORT_ENTRIES];
uint32_t cio2_prt[MAX_PORT_ENTRIES];
/* Settings specific to camera sensor */
bool disable_ssdb_defaults;