xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/amdgpu: store pcie gen mask and link width

Browse Source 
We'll need this later for pcie dpm.

Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher
2015-11-11 19:45:06 -05:00
parent 60d8edd415
commit d0dd7f0cc3
4 changed files with 99 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/gpu/drm/amd/amdgpu/cik.c
View File

@@ -32,6 +32,7 @@
#include "amdgpu_vce.h"
#include "cikd.h"
#include "atom.h"
#include "amd_pcie.h"
#include "cik.h"
#include "gmc_v7_0.h"
@@ -1595,8 +1596,8 @@ static void cik_pcie_gen3_enable(struct amdgpu_device *adev)
{
struct pci_dev *root = adev->pdev->bus->self;
int bridge_pos, gpu_pos;
u32 speed_cntl, mask, current_data_rate;
int ret, i;
u32 speed_cntl, current_data_rate;
int i;
u16 tmp16;
if (pci_is_root_bus(adev->pdev->bus))
@@ -1608,23 +1609,20 @@ static void cik_pcie_gen3_enable(struct amdgpu_device *adev)
if (adev->flags & AMD_IS_APU)
return;
ret = drm_pcie_get_speed_cap_mask(adev->ddev, &mask);
if (ret != 0)
return;
if (!(mask & (DRM_PCIE_SPEED_50 | DRM_PCIE_SPEED_80)))
if (!(adev->pm.pcie_gen_mask & (CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2 |
CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3)))
return;
speed_cntl = RREG32_PCIE(ixPCIE_LC_SPEED_CNTL);
current_data_rate = (speed_cntl & PCIE_LC_SPEED_CNTL__LC_CURRENT_DATA_RATE_MASK) >>
PCIE_LC_SPEED_CNTL__LC_CURRENT_DATA_RATE__SHIFT;
if (mask & DRM_PCIE_SPEED_80) {
if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3) {
if (current_data_rate == 2) {
DRM_INFO("PCIE gen 3 link speeds already enabled\n");
return;
}
DRM_INFO("enabling PCIE gen 3 link speeds, disable with amdgpu.pcie_gen2=0\n");
} else if (mask & DRM_PCIE_SPEED_50) {
} else if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2) {
if (current_data_rate == 1) {
DRM_INFO("PCIE gen 2 link speeds already enabled\n");
return;
@@ -1640,7 +1638,7 @@ static void cik_pcie_gen3_enable(struct amdgpu_device *adev)
if (!gpu_pos)
return;
if (mask & DRM_PCIE_SPEED_80) {
if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3) {
/* re-try equalization if gen3 is not already enabled */
if (current_data_rate != 2) {
u16 bridge_cfg, gpu_cfg;
@@ -1735,9 +1733,9 @@ static void cik_pcie_gen3_enable(struct amdgpu_device *adev)
pci_read_config_word(adev->pdev, gpu_pos + PCI_EXP_LNKCTL2, &tmp16);
tmp16 &= ~0xf;
if (mask & DRM_PCIE_SPEED_80)
if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3)
tmp16 |= 3; /* gen3 */
else if (mask & DRM_PCIE_SPEED_50)
else if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2)
tmp16 |= 2; /* gen2 */
else
tmp16 |= 1; /* gen1 */
@@ -2450,6 +2448,8 @@ static int cik_common_early_init(void *handle)
return -EINVAL;
}
amdgpu_get_pcie_info(adev);
return 0;
}