From 5c9b69d259def75f365998603d68d6749209f8b0 Mon Sep 17 00:00:00 2001 From: Chia-I Wu Date: Fri, 10 May 2013 14:23:33 +0800 Subject: [PATCH] winsys/intel: test for and expose address swizzling Without knowing whether addresses are swizzled or not, we cannot manipulate a tiled surface in CPU. --- .../winsys/intel/drm/intel_drm_winsys.c | 22 +++++++++++++++++++ src/gallium/winsys/intel/drm/intel_winsys.h | 1 + 2 files changed, 23 insertions(+) diff --git a/src/gallium/winsys/intel/drm/intel_drm_winsys.c b/src/gallium/winsys/intel/drm/intel_drm_winsys.c index 8c0e29270f5..1a8d0f7292f 100644 --- a/src/gallium/winsys/intel/drm/intel_drm_winsys.c +++ b/src/gallium/winsys/intel/drm/intel_drm_winsys.c @@ -584,6 +584,26 @@ get_param(struct intel_drm_winsys *drm_ws, int param, int *value) return true; } +static bool +test_address_swizzling(struct intel_drm_winsys *drm_ws) +{ + drm_intel_bo *bo; + uint32_t tiling = I915_TILING_X, swizzle; + unsigned long pitch; + + bo = drm_intel_bo_alloc_tiled(drm_ws->bufmgr, + "address swizzling test", 64, 64, 4, &tiling, &pitch, 0); + if (bo) { + drm_intel_bo_get_tiling(bo, &tiling, &swizzle); + drm_intel_bo_unreference(bo); + } + else { + swizzle = I915_BIT_6_SWIZZLE_NONE; + } + + return (swizzle != I915_BIT_6_SWIZZLE_NONE); +} + static bool init_info(struct intel_drm_winsys *drm_ws) { @@ -605,6 +625,8 @@ init_info(struct intel_drm_winsys *drm_ws) get_param(drm_ws, I915_PARAM_HAS_GEN7_SOL_RESET, &val); info->has_gen7_sol_reset = val; + info->has_address_swizzling = test_address_swizzling(drm_ws); + return true; } diff --git a/src/gallium/winsys/intel/drm/intel_winsys.h b/src/gallium/winsys/intel/drm/intel_winsys.h index 37ee275d2d9..90f1b49df1a 100644 --- a/src/gallium/winsys/intel/drm/intel_winsys.h +++ b/src/gallium/winsys/intel/drm/intel_winsys.h @@ -74,6 +74,7 @@ struct intel_winsys_info { int devid; bool has_llc; bool has_gen7_sol_reset; + bool has_address_swizzling; }; /** -- 2.30.2