forked from Minki/linux
b0b29e1e29
When applications modify preview engine parameters, the new values are applied to the hardware by the preview engine interrupt handler during vertical blanking. If the parameters are being changed when the interrupt handler is called, it just delays applying the parameters until the next frame. If an application modifies the parameters for every frame, and the preview engine interrupt is triggerred synchronously, the parameters are never applied to the hardware. Fix this by storing new parameters in a shadow copy, and switch the active parameters with the shadow values atomically. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
174 lines
5.0 KiB
C
174 lines
5.0 KiB
C
/*
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* isppreview.h
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*
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* TI OMAP3 ISP - Preview module
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*
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* Copyright (C) 2010 Nokia Corporation
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* Copyright (C) 2009 Texas Instruments, Inc.
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*
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* Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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* Sakari Ailus <sakari.ailus@iki.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifndef OMAP3_ISP_PREVIEW_H
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#define OMAP3_ISP_PREVIEW_H
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#include <linux/omap3isp.h>
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#include <linux/types.h>
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#include <media/v4l2-ctrls.h>
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#include "ispvideo.h"
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#define ISPPRV_BRIGHT_STEP 0x1
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#define ISPPRV_BRIGHT_DEF 0x0
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#define ISPPRV_BRIGHT_LOW 0x0
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#define ISPPRV_BRIGHT_HIGH 0xFF
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#define ISPPRV_BRIGHT_UNITS 0x1
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#define ISPPRV_CONTRAST_STEP 0x1
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#define ISPPRV_CONTRAST_DEF 0x10
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#define ISPPRV_CONTRAST_LOW 0x0
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#define ISPPRV_CONTRAST_HIGH 0xFF
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#define ISPPRV_CONTRAST_UNITS 0x1
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/* Additional features not listed in linux/omap3isp.h */
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#define OMAP3ISP_PREV_CONTRAST (1 << 17)
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#define OMAP3ISP_PREV_BRIGHTNESS (1 << 18)
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#define OMAP3ISP_PREV_FEATURES_END (1 << 19)
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enum preview_input_entity {
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PREVIEW_INPUT_NONE,
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PREVIEW_INPUT_CCDC,
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PREVIEW_INPUT_MEMORY,
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};
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#define PREVIEW_OUTPUT_RESIZER (1 << 1)
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#define PREVIEW_OUTPUT_MEMORY (1 << 2)
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/* Configure byte layout of YUV image */
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enum preview_ycpos_mode {
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YCPOS_YCrYCb = 0,
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YCPOS_YCbYCr = 1,
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YCPOS_CbYCrY = 2,
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YCPOS_CrYCbY = 3
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};
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/*
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* struct prev_params - Structure for all configuration
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* @busy: Bitmask of busy parameters (being updated or used)
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* @update: Bitmask of the parameters to be updated
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* @features: Set of features enabled.
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* @cfa: CFA coefficients.
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* @csup: Chroma suppression coefficients.
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* @luma: Luma enhancement coefficients.
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* @nf: Noise filter coefficients.
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* @dcor: Noise filter coefficients.
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* @gamma: Gamma coefficients.
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* @wbal: White Balance parameters.
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* @blkadj: Black adjustment parameters.
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* @rgb2rgb: RGB blending parameters.
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* @csc: Color space conversion (RGB to YCbCr) parameters.
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* @hmed: Horizontal median filter.
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* @yclimit: YC limits parameters.
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* @contrast: Contrast.
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* @brightness: Brightness.
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*/
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struct prev_params {
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u32 busy;
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u32 update;
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u32 features;
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struct omap3isp_prev_cfa cfa;
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struct omap3isp_prev_csup csup;
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struct omap3isp_prev_luma luma;
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struct omap3isp_prev_nf nf;
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struct omap3isp_prev_dcor dcor;
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struct omap3isp_prev_gtables gamma;
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struct omap3isp_prev_wbal wbal;
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struct omap3isp_prev_blkadj blkadj;
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struct omap3isp_prev_rgbtorgb rgb2rgb;
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struct omap3isp_prev_csc csc;
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struct omap3isp_prev_hmed hmed;
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struct omap3isp_prev_yclimit yclimit;
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u8 contrast;
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u8 brightness;
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};
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/* Sink and source previewer pads */
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#define PREV_PAD_SINK 0
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#define PREV_PAD_SOURCE 1
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#define PREV_PADS_NUM 2
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/*
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* struct isp_prev_device - Structure for storing ISP Preview module information
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* @subdev: V4L2 subdevice
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* @pads: Media entity pads
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* @formats: Active formats at the subdev pad
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* @crop: Active crop rectangle
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* @input: Module currently connected to the input pad
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* @output: Bitmask of the active output
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* @video_in: Input video entity
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* @video_out: Output video entity
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* @params.params : Active and shadow parameters sets
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* @params.active: Bitmask of parameters active in set 0
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* @params.lock: Parameters lock, protects params.active and params.shadow
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* @underrun: Whether the preview entity has queued buffers on the output
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* @state: Current preview pipeline state
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*
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* This structure is used to store the OMAP ISP Preview module Information.
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*/
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struct isp_prev_device {
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struct v4l2_subdev subdev;
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struct media_pad pads[PREV_PADS_NUM];
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struct v4l2_mbus_framefmt formats[PREV_PADS_NUM];
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struct v4l2_rect crop;
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struct v4l2_ctrl_handler ctrls;
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enum preview_input_entity input;
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unsigned int output;
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struct isp_video video_in;
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struct isp_video video_out;
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struct {
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struct prev_params params[2];
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u32 active;
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spinlock_t lock;
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} params;
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enum isp_pipeline_stream_state state;
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wait_queue_head_t wait;
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atomic_t stopping;
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};
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struct isp_device;
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int omap3isp_preview_init(struct isp_device *isp);
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void omap3isp_preview_cleanup(struct isp_device *isp);
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int omap3isp_preview_register_entities(struct isp_prev_device *prv,
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struct v4l2_device *vdev);
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void omap3isp_preview_unregister_entities(struct isp_prev_device *prv);
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void omap3isp_preview_isr_frame_sync(struct isp_prev_device *prev);
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void omap3isp_preview_isr(struct isp_prev_device *prev);
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int omap3isp_preview_busy(struct isp_prev_device *isp_prev);
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void omap3isp_preview_restore_context(struct isp_device *isp);
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#endif /* OMAP3_ISP_PREVIEW_H */
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