This v5 of the patch series is based on v4 sent by Lucas Kannebley Tavares with a few changes:
1. Fix a compilation warning on the code from the first patch, where it was missing a declaration of struct pci_host_bridge, used on the definition of the function pointer pcibios_root_bridge_prepare() in arch/powerpc/include/asm/machdep.h. 2. Incorporate some changes proposed by Tony Breeds in pseries_root_bridge_prepare().
The following description of the changes was extrated from v4:
This patch series does: 1. max_bus_speed is used to set the device to gen2 speeds 2. on power there's no longer a conflict between the pseries call and other architectures, because the overwrite is done via a ppc_md hook 3. radeon is using bus->max_bus_speed instead of drm_pcie_get_speed_cap_mask for gen2 capability detection
The first patch consists of some architecture changes, such as adding a hook on powerpc for pci_root_bridge_prepare, so that pseries will initialize it to a function, while all other architectures get a NULL pointer. So that whenever pci_create_root_bus is called, we'll get max_bus_speed properly setup from OpenFirmware.
The second patch consists of simple radeon changes not to call drm_get_pcie_speed_cap_mask anymore. I assume that on x86 machines, the max_bus_speed property will be properly set already.
Kleber Sacilotto de Souza (2): ppc64: perform proper max_bus_speed detection radeon: use max_bus_speed to activate gen2 speeds
arch/powerpc/include/asm/machdep.h | 3 ++ arch/powerpc/kernel/pci-common.c | 8 ++++ arch/powerpc/platforms/pseries/pci.c | 53 ++++++++++++++++++++++++++++++ arch/powerpc/platforms/pseries/pseries.h | 4 ++ arch/powerpc/platforms/pseries/setup.c | 2 + drivers/gpu/drm/radeon/evergreen.c | 10 ++---- drivers/gpu/drm/radeon/r600.c | 9 +---- drivers/gpu/drm/radeon/rv770.c | 9 +---- 8 files changed, 77 insertions(+), 21 deletions(-)