diff options
| author | Cliff Huang <cliff.huang@intel.corp-partner.google.com> | 2022-04-28 18:55:48 -0700 |
|---|---|---|
| committer | Martin L Roth <gaumless@tutanota.com> | 2022-06-18 04:35:37 +0000 |
| commit | edf71a08b4cb7bd8683344aa4ad301f1526289c2 (patch) | |
| tree | f25e916dba05240397eaf1f62256e00bdd50371a /src/soc | |
| parent | 74ed2a5d609165dd1279d91d69dc811b59404d2e (diff) | |
soc/intel/alderlake: Skip PCIe source clock assignment if incorrect
When an enabled root port without pcie_rp clock being specified, the
empty structure provides invalid info, which indicates '0' is the
clock source and request. If a root port does not use clock source, it
should still need to provide pcie_rp clock structure with flags set to
PCIE_RP_CLK_SRC_UNUSED. If flags, clk_src, and clk_req are all '0', it
is considered that pcie_rp clock structure is not provided for that
root port.
Add check and skip for enabled root port that does not have clock
structure. In addition, a root port can not use a free running clock or
clock set to LAN.
Note that ClockUsage is either free running clock, LAN clock, or the
root port number which consumes the clock.
BRANCH=firmware-brya-14505.B
Signed-off-by: Cliff Huang <cliff.huang@intel.corp-partner.google.com>
Change-Id: I17d52374c84ec0abf888efa0fa2077a6eaf70f6c
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63947
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/intel/alderlake/romstage/fsp_params.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/soc/intel/alderlake/romstage/fsp_params.c b/src/soc/intel/alderlake/romstage/fsp_params.c index 38d7c67bdc..d98d006096 100644 --- a/src/soc/intel/alderlake/romstage/fsp_params.c +++ b/src/soc/intel/alderlake/romstage/fsp_params.c @@ -58,6 +58,10 @@ static void pcie_rp_init(FSP_M_CONFIG *m_cfg, uint32_t en_mask, enum pcie_rp_typ continue; if (cfg[i].flags & PCIE_RP_CLK_SRC_UNUSED) continue; + if (!cfg[i].flags && cfg[i].clk_src == 0 && cfg[i].clk_req == 0) { + printk(BIOS_WARNING, "Missing root port clock structure definition\n"); + continue; + } if (clk_req_mapping & (1 << cfg[i].clk_req)) printk(BIOS_WARNING, "Found overlapped clkreq assignment on clk req %d\n" , cfg[i].clk_req); |