This patch fixes rendering errors on some evergreen boards. Hardcoding the backend map is not an optimal solution, but a better fix is being worked on.
Similar to the fix for rv740 (6271901d828b34b27607314026deaf417f9f9b75).
Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=29986
Signed-off-by: Alex Deucher alexdeucher@gmail.com Cc: stable@kernel.org --- drivers/gpu/drm/radeon/evergreen.c | 27 +++++++++++++++++++-------- 1 files changed, 19 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c index f5430ed..8efffb6 100644 --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -1195,14 +1195,25 @@ static void evergreen_gpu_init(struct radeon_device *rdev) EVERGREEN_MAX_BACKENDS_MASK)); break; } - } else - gb_backend_map = - evergreen_get_tile_pipe_to_backend_map(rdev, - rdev->config.evergreen.max_tile_pipes, - rdev->config.evergreen.max_backends, - ((EVERGREEN_MAX_BACKENDS_MASK << - rdev->config.evergreen.max_backends) & - EVERGREEN_MAX_BACKENDS_MASK)); + } else { + switch (rdev->family) { + case CHIP_CYPRESS: + case CHIP_HEMLOCK: + gb_backend_map = 0x66442200; + break; + case CHIP_JUNIPER: + gb_backend_map = 0x00006420; + break; + default: + gb_backend_map = + evergreen_get_tile_pipe_to_backend_map(rdev, + rdev->config.evergreen.max_tile_pipes, + rdev->config.evergreen.max_backends, + ((EVERGREEN_MAX_BACKENDS_MASK << + rdev->config.evergreen.max_backends) & + EVERGREEN_MAX_BACKENDS_MASK)); + } + }
rdev->config.evergreen.tile_config = gb_addr_config; WREG32(GB_BACKEND_MAP, gb_backend_map);