hwc: Add assertive display support.
Add assertive display support to hwc. This feature takes effect when
node /sys/class/graphics/fb*/ad is present. This signifies that that LM0
is being used with fb* for writeback.
When a video playback begins we write "1" to this node to indicate to
post processing that a writeback will happen. Likewise a "0" is written
to this node when playback stops.
The original contents are worked upon and the modified output is fed
via writeback to either rotator or mdp as appropriate.
The feature doesnt trigger when either:
1) Buffer size exceeds 2048
2) External display is connected
3) Multiple yuv streams are present
When this mode is active, MDP comp is applied only to yuv layer.
Change-Id: If5520f9dc849de3189c9f9ed4e9072c8f8f760e1
diff --git a/libhwcomposer/hwc_ad.h b/libhwcomposer/hwc_ad.h
new file mode 100644
index 0000000..38b724d
--- /dev/null
+++ b/libhwcomposer/hwc_ad.h
@@ -0,0 +1,67 @@
+/*
+* Copyright (c) 2013 The Linux Foundation. All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions are
+* met:
+* * Redistributions of source code must retain the above copyright
+* notice, this list of conditions and the following disclaimer.
+* * Redistributions in binary form must reproduce the above
+* copyright notice, this list of conditions and the following
+* disclaimer in the documentation and/or other materials provided
+* with the distribution.
+* * Neither the name of The Linux Foundation. nor the names of its
+* contributors may be used to endorse or promote products derived
+* from this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef HWC_AD_H
+#define HWC_AD_H
+
+#include <overlayUtils.h>
+#include <hwc_utils.h>
+
+struct hwc_context_t;
+
+namespace qhwc {
+
+class AssertiveDisplay {
+public:
+ AssertiveDisplay();
+ void markDoable(hwc_context_t *ctx, const hwc_display_contents_1_t* list);
+ bool prepare(hwc_context_t *ctx, const hwc_rect_t& crop,
+ const overlay::utils::Whf& whf,
+ const private_handle_t *hnd);
+ bool draw(hwc_context_t *ctx, int fd, uint32_t offset);
+ //Resets a few members on each draw round
+ void reset() { mDoable = false;
+ mDest = overlay::utils::OV_INVALID;
+ }
+ bool isDoable() const { return mDoable; }
+ bool isModeOn() const { return (mWbFd >= 0); }
+ int getDstFd(hwc_context_t *ctx) const;
+ uint32_t getDstOffset(hwc_context_t *ctx) const;
+
+private:
+ //State of feature turned on and off
+ int mWbFd;
+ bool mDoable;
+ //State of feature existence on certain devices and configs.
+ bool mFeatureEnabled;
+ overlay::utils::eDest mDest;
+};
+
+}
+#endif