/*
* Copyright © 2018 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors:
* Madhav Chauhan <madhav.chauhan@intel.com>
* Jani Nikula <jani.nikula@intel.com>
*/
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_atomic_helper.h>
#include "intel_dsi.h"
static inline int header_credits_available(struct drm_i915_private *dev_priv,
enum transcoder dsi_trans)
{
return (I915_READ(DSI_CMD_TXCTL(dsi_trans)) & FREE_HEADER_CREDIT_MASK)
>> FREE_HEADER_CREDIT_SHIFT;
}
static inline int payload_credits_available(struct drm_i915_private *dev_priv,
enum transcoder dsi_trans)
{
return (I915_READ(DSI_CMD_TXCTL(dsi_trans)) & FREE_PLOAD_CREDIT_MASK)
>> FREE_PLOAD_CREDIT_SHIFT;
}
static void wait_for_header_credits(struct drm_i915_private *dev_priv,
enum transcoder dsi_trans)
{
if (wait_for_us(header_credits_available(dev_priv