drivers/intel/mipi_camera: Add camera power resource to SSDT
This change adds support function to parse entries in the devicetree to
generate PowerResource entries for the MIPI camera.
Change-Id: I31e198b50acf2c64035aff9cb054fbe3602dd83e
Signed-off-by: Sugnan Prabhu S <sugnan.prabhu.s@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41624
Reviewed-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/drivers/intel/mipi_camera/camera.c b/src/drivers/intel/mipi_camera/camera.c
index 03e5ab6..f32f744 100644
--- a/src/drivers/intel/mipi_camera/camera.c
+++ b/src/drivers/intel/mipi_camera/camera.c
@@ -17,6 +17,7 @@
#define DEFAULT_REMOTE_NAME "\\_SB.PCI0.CIO2"
#define CIO2_PCI_DEV 0x14
#define CIO2_PCI_FN 0x3
+#define POWER_RESOURCE_NAME "PRIC"
/*
* This implementation assumes there is only 1 endpoint at each end of every data port. It also
@@ -435,6 +436,58 @@
acpi_dp_write(dsd);
}
+static void fill_power_res_sequence(struct drivers_intel_mipi_camera_config *config,
+ struct operation_seq *seq)
+{
+ unsigned int i;
+ uint8_t index;
+ uint8_t gpio_num;
+
+ for (i = 0; i < seq->ops_cnt; i++) {
+ switch (seq->ops[i].type) {
+ case IMGCLK:
+ index = seq->ops[i].index;
+ if (seq->ops[i].action == ENABLE) {
+ acpigen_emit_namestring("MCON");
+ acpigen_write_byte(config->clk_panel.clks[index].clknum);
+ acpigen_write_byte(config->clk_panel.clks[index].freq);
+ } else if (seq->ops[i].action == DISABLE) {
+ acpigen_emit_namestring("MCOF");
+ acpigen_write_byte(config->clk_panel.clks[index].clknum);
+ } else {
+ acpigen_write_debug_string("Unsupported clock action");
+ printk(BIOS_ERR, "Unsupported clock action: %x\n",
+ seq->ops[i].action);
+ printk(BIOS_ERR, "OS camera driver will likely not work");
+ }
+
+ break;
+ case GPIO:
+ index = seq->ops[i].index;
+ gpio_num = config->gpio_panel.gpio[index].gpio_num;
+ if (seq->ops[i].action == ENABLE) {
+ acpigen_soc_set_tx_gpio(gpio_num);
+ } else if (seq->ops[i].action == DISABLE) {
+ acpigen_soc_clear_tx_gpio(gpio_num);
+ } else {
+ acpigen_write_debug_string("Unsupported GPIO action");
+ printk(BIOS_ERR, "Unsupported GPIO action: %x\n",
+ seq->ops[i].action);
+ printk(BIOS_ERR, "OS camera driver will likely not work");
+ }
+
+ break;
+ default:
+ printk(BIOS_ERR, "Unsupported power operation: %x\n", seq->ops[i].type);
+ printk(BIOS_ERR, "OS camera driver will likely not work");
+ break;
+ }
+
+ if (seq->ops[i].delay_ms)
+ acpigen_write_sleep(seq->ops[i].delay_ms);
+ }
+}
+
static void write_pci_camera_device(const struct device *dev)
{
struct drivers_intel_mipi_camera_config *config = dev->chip_info;
@@ -467,6 +520,40 @@
acpigen_write_device(acpi_device_name(dev));
+ /* add power resource */
+ if (config->has_power_resource) {
+ acpigen_write_power_res(POWER_RESOURCE_NAME, 0, 0, NULL, 0);
+ acpigen_write_name_integer("STA", 0);
+ acpigen_write_STA_ext("STA");
+
+ acpigen_write_method_serialized("_ON", 0);
+ acpigen_write_if();
+ acpigen_emit_byte(LEQUAL_OP);
+ acpigen_emit_namestring("STA");
+ acpigen_write_integer(0);
+
+ fill_power_res_sequence(config, &config->on_seq);
+
+ acpigen_write_store_op_to_namestr(1, "STA");
+ acpigen_pop_len(); /* if */
+ acpigen_pop_len(); /* _ON */
+
+ /* _OFF operations */
+ acpigen_write_method_serialized("_OFF", 0);
+ acpigen_write_if();
+ acpigen_emit_byte(LEQUAL_OP);
+ acpigen_emit_namestring("STA");
+ acpigen_write_integer(1);
+
+ fill_power_res_sequence(config, &config->off_seq);
+
+ acpigen_write_store_op_to_namestr(0, "STA");
+ acpigen_pop_len(); /* if */
+ acpigen_pop_len(); /* _ON */
+
+ acpigen_pop_len(); /* Power Resource */
+ }
+
if (config->device_type == INTEL_ACPI_CAMERA_SENSOR)
acpigen_write_name_integer("_ADR", 0);
@@ -519,6 +606,17 @@
acpigen_write_name_integer("CAMD", config->device_type);
}
+ if (config->pr0 || config->has_power_resource) {
+ acpigen_write_name("_PR0");
+ acpigen_write_package(1);
+ if (config->pr0)
+ acpigen_emit_namestring(config->pr0); /* External power resource */
+ else
+ acpigen_emit_namestring(POWER_RESOURCE_NAME);
+
+ acpigen_pop_len(); /* _PR0 */
+ }
+
switch (config->device_type) {
case INTEL_ACPI_CAMERA_CIO2:
camera_fill_cio2(dev);