[PATCHv4 0/2] Speed Cap fixes for ppc64
lucaskt at linux.vnet.ibm.com
lucaskt at linux.vnet.ibm.com
Wed Apr 24 15:54:48 PDT 2013
From: Lucas Kannebley Tavares <lucaskt at vnet.linux.ibm.com>
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
And I've also added the changes proposed by Michael Ellerman:
1. Corrected Patch 1's comments
2. Moved forward function declarations to pseries.h header
3. Added forward references to struct pci_host_bridge, preventing compilation fails.
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 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.
Lucas Kannebley Tavares (2):
ppc64: perform proper max_bus_speed detection
radeon: use max_bus_speed to activate gen2 speeds
arch/powerpc/include/asm/machdep.h | 2 ++
arch/powerpc/kernel/pci-common.c | 8 +++++
arch/powerpc/platforms/pseries/pci.c | 51 ++++++++++++++++++++++++++++++++
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, 74 insertions(+), 21 deletions(-)
--
1.8.1.4
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