From 67f3b58f3bac975f35c312fd8876edb599cc24be Mon Sep 17 00:00:00 2001 From: Animesh Manna Date: Fri, 20 Sep 2019 17:29:22 +0530 Subject: drm/i915/dsb: DSB context creation. This patch adds a function, which will internally get the gem buffer for DSB engine. The GEM buffer is from global GTT, and is mapped into CPU domain, contains the data + opcode to be feed to DSB engine. v1: Initial version. v2: - removed some unwanted code. (Chris) - Used i915_gem_object_create_internal instead of _shmem. (Chris) - cmd_buf_tail removed and can be derived through vma object. (Chris) v3: vma realeased if i915_gem_object_pin_map() failed. (Shashank) v4: for simplification and based on current usage added single dsb object in intel_crtc. (Shashank) v5: seting NULL to cmd_buf moved outside of mutex in dsb-put(). (Shashank) v6: - refcount machanism added. - Used atomic_add_return and atomic_dec_and_test instead of atomic_inc and atomic_dec. (Jani) Cc: Imre Deak Cc: Michel Thierry Cc: Jani Nikula Cc: Rodrigo Vivi Cc: Shashank Sharma Signed-off-by: Animesh Manna [Jani: added #include while pushing] Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20190920115930.27829-3-animesh.manna@intel.com --- drivers/gpu/drm/i915/display/intel_dsb.h | 33 ++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 drivers/gpu/drm/i915/display/intel_dsb.h (limited to 'drivers/gpu/drm/i915/display/intel_dsb.h') diff --git a/drivers/gpu/drm/i915/display/intel_dsb.h b/drivers/gpu/drm/i915/display/intel_dsb.h new file mode 100644 index 000000000000..b8639864df50 --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_dsb.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: MIT + * + * Copyright © 2019 Intel Corporation + */ + +#ifndef _INTEL_DSB_H +#define _INTEL_DSB_H + +#include + +struct intel_crtc; +struct i915_vma; + +enum dsb_id { + INVALID_DSB = -1, + DSB1, + DSB2, + DSB3, + MAX_DSB_PER_PIPE +}; + +struct intel_dsb { + atomic_t refcount; + enum dsb_id id; + u32 *cmd_buf; + struct i915_vma *vma; +}; + +struct intel_dsb * +intel_dsb_get(struct intel_crtc *crtc); +void intel_dsb_put(struct intel_dsb *dsb); + +#endif -- cgit v1.2.3