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isp: Set S2 power through ACPI

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Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
This commit is contained in:
Patrik Jakobsson
2015-08-01 17:20:52 +02:00
parent e7c3775956
commit 4c233a7f5f
3 changed files with 56 additions and 0 deletions
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6
bcwc_hw.c
View File

@@ -754,6 +754,12 @@ int bcwc_hw_init(struct bcwc_private *dev_priv)
/* Save our working configuration */
bcwc_hw_ddr_phy_save_regs(dev_priv);
BCWC_S2_REG_WRITE(0x8, S2_D108);
BCWC_S2_REG_WRITE(0xc, S2_D104);
BCWC_ISP_REG_WRITE(0, ISP_REG_40004);
isp_init(dev_priv);
out:
return ret;

4
bcwc_reg.h
View File

@@ -20,6 +20,10 @@
#define S2_PCIE_LINK_D128 0xd128
#define S2_PCIE_LINK_D12C 0xd12c
/* Unknown */
#define S2_D104 0xd104
#define S2_D108 0xd108
/* These are written to 0x203 before DDR soc init */
#define S2_DDR_REG_1100 0x1100
#define S2_DDR_REG_1104 0x1104

46
isp.c
View File

@@ -11,11 +11,57 @@
*/
#include <linux/delay.h>
#include <linux/acpi.h>
#include "bcwc_drv.h"
#include "bcwc_hw.h"
#include "bcwc_reg.h"
#include "isp.h"
int isp_acpi_set_power(struct bcwc_private *dev_priv, int power)
{
acpi_status status;
acpi_handle handle;
struct acpi_object_list arg_list;
struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
union acpi_object args[1];
union acpi_object *result;
int ret = 0;
status = acpi_get_handle(NULL, "\\_SB.PCI0.RP02.CMRA.CMPE", &handle);
if (ACPI_FAILURE(status)) {
dev_err(&dev_priv->pdev->dev,
"Failed to get S2 CMPE ACPI handle\n");
ret = -ENODEV;
goto out;
}
args[0].type = ACPI_TYPE_INTEGER;
args[0].integer.value = power;
arg_list.count = 1;
arg_list.pointer = args;
status = acpi_evaluate_object(handle, NULL, &arg_list, &buffer);
if (ACPI_FAILURE(status)) {
dev_err(&dev_priv->pdev->dev,
"Failed to execute S2 CMPE ACPI method\n");
ret = -ENODEV;
goto out;
}
result = buffer.pointer;
if (result->type != ACPI_TYPE_INTEGER || result->integer.value != 0) {
dev_err(&dev_priv->pdev->dev,
"Invalid ACPI response (len: %Ld)\n", buffer.length);
ret = -EINVAL;
}
out:
kfree(buffer.pointer);
return ret;
}
int isp_init(struct bcwc_private *dev_priv)
{
u32 num_channels, queue_size;