drivers/media/platform/ti/omap3isp/isph3a_af.c
Source file repositories/reference/linux-study-clean/drivers/media/platform/ti/omap3isp/isph3a_af.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/media/platform/ti/omap3isp/isph3a_af.c- Extension
.c- Size
- 11078 bytes
- Lines
- 406
- Domain
- Driver Families
- Bucket
- drivers/media
- Inferred role
- Driver Families: implementation source
- Status
- source implementation candidate
Why This File Exists
Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Allocates kernel memory; connect allocation flags and lifetime to context constraints.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/device.hlinux/slab.hisp.hisph3a.hispstat.h
Detected Declarations
function Copyrightfunction h3a_af_enablefunction h3a_af_busyfunction h3a_af_get_buf_sizefunction h3a_af_validate_paramsfunction h3a_af_set_paramsfunction h3a_af_ioctlfunction omap3isp_h3a_af_initfunction omap3isp_h3a_af_cleanup
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0-only
/*
* isph3a_af.c
*
* TI OMAP3 ISP - H3A AF module
*
* Copyright (C) 2010 Nokia Corporation
* Copyright (C) 2009 Texas Instruments, Inc.
*
* Contacts: David Cohen <dacohen@gmail.com>
* Laurent Pinchart <laurent.pinchart@ideasonboard.com>
* Sakari Ailus <sakari.ailus@iki.fi>
*/
/* Linux specific include files */
#include <linux/device.h>
#include <linux/slab.h>
#include "isp.h"
#include "isph3a.h"
#include "ispstat.h"
#define IS_OUT_OF_BOUNDS(value, min, max) \
((((unsigned int)value) < (min)) || (((unsigned int)value) > (max)))
static void h3a_af_setup_regs(struct ispstat *af, void *priv)
{
struct omap3isp_h3a_af_config *conf = priv;
u32 pcr;
u32 pax1;
u32 pax2;
u32 paxstart;
u32 coef;
u32 base_coef_set0;
u32 base_coef_set1;
int index;
if (af->state == ISPSTAT_DISABLED)
return;
isp_reg_writel(af->isp, af->active_buf->dma_addr, OMAP3_ISP_IOMEM_H3A,
ISPH3A_AFBUFST);
if (!af->update)
return;
/* Configure Hardware Registers */
pax1 = ((conf->paxel.width >> 1) - 1) << AF_PAXW_SHIFT;
/* Set height in AFPAX1 */
pax1 |= (conf->paxel.height >> 1) - 1;
isp_reg_writel(af->isp, pax1, OMAP3_ISP_IOMEM_H3A, ISPH3A_AFPAX1);
/* Configure AFPAX2 Register */
/* Set Line Increment in AFPAX2 Register */
pax2 = ((conf->paxel.line_inc >> 1) - 1) << AF_LINE_INCR_SHIFT;
/* Set Vertical Count */
pax2 |= (conf->paxel.v_cnt - 1) << AF_VT_COUNT_SHIFT;
/* Set Horizontal Count */
pax2 |= (conf->paxel.h_cnt - 1);
isp_reg_writel(af->isp, pax2, OMAP3_ISP_IOMEM_H3A, ISPH3A_AFPAX2);
/* Configure PAXSTART Register */
/*Configure Horizontal Start */
paxstart = conf->paxel.h_start << AF_HZ_START_SHIFT;
/* Configure Vertical Start */
paxstart |= conf->paxel.v_start;
isp_reg_writel(af->isp, paxstart, OMAP3_ISP_IOMEM_H3A,
ISPH3A_AFPAXSTART);
/*SetIIRSH Register */
isp_reg_writel(af->isp, conf->iir.h_start,
OMAP3_ISP_IOMEM_H3A, ISPH3A_AFIIRSH);
base_coef_set0 = ISPH3A_AFCOEF010;
base_coef_set1 = ISPH3A_AFCOEF110;
for (index = 0; index <= 8; index += 2) {
/*Set IIR Filter0 Coefficients */
coef = 0;
coef |= conf->iir.coeff_set0[index];
coef |= conf->iir.coeff_set0[index + 1] <<
AF_COEF_SHIFT;
isp_reg_writel(af->isp, coef, OMAP3_ISP_IOMEM_H3A,
base_coef_set0);
base_coef_set0 += AFCOEF_OFFSET;
/*Set IIR Filter1 Coefficients */
coef = 0;
coef |= conf->iir.coeff_set1[index];
coef |= conf->iir.coeff_set1[index + 1] <<
AF_COEF_SHIFT;
Annotation
- Immediate include surface: `linux/device.h`, `linux/slab.h`, `isp.h`, `isph3a.h`, `ispstat.h`.
- Detected declarations: `function Copyright`, `function h3a_af_enable`, `function h3a_af_busy`, `function h3a_af_get_buf_size`, `function h3a_af_validate_params`, `function h3a_af_set_params`, `function h3a_af_ioctl`, `function omap3isp_h3a_af_init`, `function omap3isp_h3a_af_cleanup`.
- Atlas domain: Driver Families / drivers/media.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.