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author | Alex Deucher <alexander.deucher@amd.com> | 2013-02-26 11:26:51 -0500 |
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committer | Alex Deucher <alexander.deucher@amd.com> | 2013-04-23 18:03:55 -0400 |
commit | 2e1b65f98bcaea6544d8781c3b34c631fcebe29a (patch) | |
tree | 57d2f6e9fb9f616dd99d0d828a63b4b056896287 /drivers/gpu/drm/radeon/radeon_device.c | |
parent | 79b52d6a7085a3e430c6de450a5847fdbe04159b (diff) | |
download | op-kernel-dev-2e1b65f98bcaea6544d8781c3b34c631fcebe29a.zip op-kernel-dev-2e1b65f98bcaea6544d8781c3b34c631fcebe29a.tar.gz |
drm/radeon: add helper function to support golden registers
Golden registers are arrays of register settings from the
hw team that need to be initialized at asic startup.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_device.c')
-rw-r--r-- | drivers/gpu/drm/radeon/radeon_device.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c index 62d0ba3..237b7a7 100644 --- a/drivers/gpu/drm/radeon/radeon_device.c +++ b/drivers/gpu/drm/radeon/radeon_device.c @@ -98,6 +98,42 @@ static const char radeon_family_name[][16] = { }; /** + * radeon_program_register_sequence - program an array of registers. + * + * @rdev: radeon_device pointer + * @registers: pointer to the register array + * @array_size: size of the register array + * + * Programs an array or registers with and and or masks. + * This is a helper for setting golden registers. + */ +void radeon_program_register_sequence(struct radeon_device *rdev, + const u32 *registers, + const u32 array_size) +{ + u32 tmp, reg, and_mask, or_mask; + int i; + + if (array_size % 3) + return; + + for (i = 0; i < array_size; i +=3) { + reg = registers[i + 0]; + and_mask = registers[i + 1]; + or_mask = registers[i + 2]; + + if (and_mask == 0xffffffff) { + tmp = or_mask; + } else { + tmp = RREG32(reg); + tmp &= ~and_mask; + tmp |= or_mask; + } + WREG32(reg, tmp); + } +} + +/** * radeon_surface_init - Clear GPU surface registers. * * @rdev: radeon_device pointer |