From 2e1b65f98bcaea6544d8781c3b34c631fcebe29a Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Tue, 26 Feb 2013 11:26:51 -0500 Subject: [PATCH] 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 --- drivers/gpu/drm/radeon/radeon.h | 3 +++ drivers/gpu/drm/radeon/radeon_device.c | 36 ++++++++++++++++++++++++++ 2 files changed, 39 insertions(+) diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index 856a67d5bd9b..d6c8cbaa8693 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -1946,6 +1946,9 @@ extern void radeon_gtt_location(struct radeon_device *rdev, struct radeon_mc *mc extern int radeon_resume_kms(struct drm_device *dev); extern int radeon_suspend_kms(struct drm_device *dev, pm_message_t state); extern void radeon_ttm_set_active_vram_size(struct radeon_device *rdev, u64 size); +extern void radeon_program_register_sequence(struct radeon_device *rdev, + const u32 *registers, + const u32 array_size); /* * vm diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c index 62d0ba338582..237b7a7549e6 100644 --- a/drivers/gpu/drm/radeon/radeon_device.c +++ b/drivers/gpu/drm/radeon/radeon_device.c @@ -97,6 +97,42 @@ static const char radeon_family_name[][16] = { "LAST", }; +/** + * 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. * -- 2.30.2