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linux-next/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
Thomas Gleixner 1802d0beec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation this program is
  distributed in the hope that it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 655 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:41 -07:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2015 MediaTek Inc.
* Authors:
* YT Shen <yt.shen@mediatek.com>
* CK Hu <ck.hu@mediatek.com>
*/
#include <linux/clk.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <drm/drmP.h>
#include "mtk_drm_drv.h"
#include "mtk_drm_plane.h"
#include "mtk_drm_ddp_comp.h"
#include "mtk_drm_crtc.h"
#define DISP_OD_EN 0x0000
#define DISP_OD_INTEN 0x0008
#define DISP_OD_INTSTA 0x000c
#define DISP_OD_CFG 0x0020
#define DISP_OD_SIZE 0x0030
#define DISP_DITHER_5 0x0114
#define DISP_DITHER_7 0x011c
#define DISP_DITHER_15 0x013c
#define DISP_DITHER_16 0x0140
#define DISP_REG_UFO_START 0x0000
#define DISP_AAL_EN 0x0000
#define DISP_AAL_SIZE 0x0030
#define DISP_GAMMA_EN 0x0000
#define DISP_GAMMA_CFG 0x0020
#define DISP_GAMMA_SIZE 0x0030
#define DISP_GAMMA_LUT 0x0700
#define LUT_10BIT_MASK 0x03ff
#define OD_RELAYMODE BIT(0)
#define UFO_BYPASS BIT(2)
#define AAL_EN BIT(0)
#define GAMMA_EN BIT(0)
#define GAMMA_LUT_EN BIT(1)
#define DISP_DITHERING BIT(2)
#define DITHER_LSB_ERR_SHIFT_R(x) (((x) & 0x7) << 28)
#define DITHER_OVFLW_BIT_R(x) (((x) & 0x7) << 24)
#define DITHER_ADD_LSHIFT_R(x) (((x) & 0x7) << 20)
#define DITHER_ADD_RSHIFT_R(x) (((x) & 0x7) << 16)
#define DITHER_NEW_BIT_MODE BIT(0)
#define DITHER_LSB_ERR_SHIFT_B(x) (((x) & 0x7) << 28)
#define DITHER_OVFLW_BIT_B(x) (((x) & 0x7) << 24)
#define DITHER_ADD_LSHIFT_B(x) (((x) & 0x7) << 20)
#define DITHER_ADD_RSHIFT_B(x) (((x) & 0x7) << 16)
#define DITHER_LSB_ERR_SHIFT_G(x) (((x) & 0x7) << 12)
#define DITHER_OVFLW_BIT_G(x) (((x) & 0x7) << 8)
#define DITHER_ADD_LSHIFT_G(x) (((x) & 0x7) << 4)
#define DITHER_ADD_RSHIFT_G(x) (((x) & 0x7) << 0)
void mtk_dither_set(struct mtk_ddp_comp *comp, unsigned int bpc,
unsigned int CFG)
{
/* If bpc equal to 0, the dithering function didn't be enabled */
if (bpc == 0)
return;
if (bpc >= MTK_MIN_BPC) {
writel(0, comp->regs + DISP_DITHER_5);
writel(0, comp->regs + DISP_DITHER_7);
writel(DITHER_LSB_ERR_SHIFT_R(MTK_MAX_BPC - bpc) |
DITHER_ADD_LSHIFT_R(MTK_MAX_BPC - bpc) |
DITHER_NEW_BIT_MODE,
comp->regs + DISP_DITHER_15);
writel(DITHER_LSB_ERR_SHIFT_B(MTK_MAX_BPC - bpc) |
DITHER_ADD_LSHIFT_B(MTK_MAX_BPC - bpc) |
DITHER_LSB_ERR_SHIFT_G(MTK_MAX_BPC - bpc) |
DITHER_ADD_LSHIFT_G(MTK_MAX_BPC - bpc),
comp->regs + DISP_DITHER_16);
writel(DISP_DITHERING, comp->regs + CFG);
}
}
static void mtk_od_config(struct mtk_ddp_comp *comp, unsigned int w,
unsigned int h, unsigned int vrefresh,
unsigned int bpc)
{
writel(w << 16 | h, comp->regs + DISP_OD_SIZE);
writel(OD_RELAYMODE, comp->regs + DISP_OD_CFG);
mtk_dither_set(comp, bpc, DISP_OD_CFG);
}
static void mtk_od_start(struct mtk_ddp_comp *comp)
{
writel(1, comp->regs + DISP_OD_EN);
}
static void mtk_ufoe_start(struct mtk_ddp_comp *comp)
{
writel(UFO_BYPASS, comp->regs + DISP_REG_UFO_START);
}
static void mtk_aal_config(struct mtk_ddp_comp *comp, unsigned int w,
unsigned int h, unsigned int vrefresh,
unsigned int bpc)
{
writel(h << 16 | w, comp->regs + DISP_AAL_SIZE);
}
static void mtk_aal_start(struct mtk_ddp_comp *comp)
{
writel(AAL_EN, comp->regs + DISP_AAL_EN);
}
static void mtk_aal_stop(struct mtk_ddp_comp *comp)
{
writel_relaxed(0x0, comp->regs + DISP_AAL_EN);
}
static void mtk_gamma_config(struct mtk_ddp_comp *comp, unsigned int w,
unsigned int h, unsigned int vrefresh,
unsigned int bpc)
{
writel(h << 16 | w, comp->regs + DISP_GAMMA_SIZE);
mtk_dither_set(comp, bpc, DISP_GAMMA_CFG);
}
static void mtk_gamma_start(struct mtk_ddp_comp *comp)
{
writel(GAMMA_EN, comp->regs + DISP_GAMMA_EN);
}
static void mtk_gamma_stop(struct mtk_ddp_comp *comp)
{
writel_relaxed(0x0, comp->regs + DISP_GAMMA_EN);
}
static void mtk_gamma_set(struct mtk_ddp_comp *comp,
struct drm_crtc_state *state)
{
unsigned int i, reg;
struct drm_color_lut *lut;
void __iomem *lut_base;
u32 word;
if (state->gamma_lut) {
reg = readl(comp->regs + DISP_GAMMA_CFG);
reg = reg | GAMMA_LUT_EN;
writel(reg, comp->regs + DISP_GAMMA_CFG);
lut_base = comp->regs + DISP_GAMMA_LUT;
lut = (struct drm_color_lut *)state->gamma_lut->data;
for (i = 0; i < MTK_LUT_SIZE; i++) {
word = (((lut[i].red >> 6) & LUT_10BIT_MASK) << 20) +
(((lut[i].green >> 6) & LUT_10BIT_MASK) << 10) +
((lut[i].blue >> 6) & LUT_10BIT_MASK);
writel(word, (lut_base + i * 4));
}
}
}
static const struct mtk_ddp_comp_funcs ddp_aal = {
.gamma_set = mtk_gamma_set,
.config = mtk_aal_config,
.start = mtk_aal_start,
.stop = mtk_aal_stop,
};
static const struct mtk_ddp_comp_funcs ddp_gamma = {
.gamma_set = mtk_gamma_set,
.config = mtk_gamma_config,
.start = mtk_gamma_start,
.stop = mtk_gamma_stop,
};
static const struct mtk_ddp_comp_funcs ddp_od = {
.config = mtk_od_config,
.start = mtk_od_start,
};
static const struct mtk_ddp_comp_funcs ddp_ufoe = {
.start = mtk_ufoe_start,
};
static const char * const mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX] = {
[MTK_DISP_OVL] = "ovl",
[MTK_DISP_RDMA] = "rdma",
[MTK_DISP_WDMA] = "wdma",
[MTK_DISP_COLOR] = "color",
[MTK_DISP_AAL] = "aal",
[MTK_DISP_GAMMA] = "gamma",
[MTK_DISP_UFOE] = "ufoe",
[MTK_DSI] = "dsi",
[MTK_DPI] = "dpi",
[MTK_DISP_PWM] = "pwm",
[MTK_DISP_MUTEX] = "mutex",
[MTK_DISP_OD] = "od",
[MTK_DISP_BLS] = "bls",
};
struct mtk_ddp_comp_match {
enum mtk_ddp_comp_type type;
int alias_id;
const struct mtk_ddp_comp_funcs *funcs;
};
static const struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
[DDP_COMPONENT_AAL0] = { MTK_DISP_AAL, 0, &ddp_aal },
[DDP_COMPONENT_AAL1] = { MTK_DISP_AAL, 1, &ddp_aal },
[DDP_COMPONENT_BLS] = { MTK_DISP_BLS, 0, NULL },
[DDP_COMPONENT_COLOR0] = { MTK_DISP_COLOR, 0, NULL },
[DDP_COMPONENT_COLOR1] = { MTK_DISP_COLOR, 1, NULL },
[DDP_COMPONENT_DPI0] = { MTK_DPI, 0, NULL },
[DDP_COMPONENT_DPI1] = { MTK_DPI, 1, NULL },
[DDP_COMPONENT_DSI0] = { MTK_DSI, 0, NULL },
[DDP_COMPONENT_DSI1] = { MTK_DSI, 1, NULL },
[DDP_COMPONENT_DSI2] = { MTK_DSI, 2, NULL },
[DDP_COMPONENT_DSI3] = { MTK_DSI, 3, NULL },
[DDP_COMPONENT_GAMMA] = { MTK_DISP_GAMMA, 0, &ddp_gamma },
[DDP_COMPONENT_OD0] = { MTK_DISP_OD, 0, &ddp_od },
[DDP_COMPONENT_OD1] = { MTK_DISP_OD, 1, &ddp_od },
[DDP_COMPONENT_OVL0] = { MTK_DISP_OVL, 0, NULL },
[DDP_COMPONENT_OVL1] = { MTK_DISP_OVL, 1, NULL },
[DDP_COMPONENT_PWM0] = { MTK_DISP_PWM, 0, NULL },
[DDP_COMPONENT_PWM1] = { MTK_DISP_PWM, 1, NULL },
[DDP_COMPONENT_PWM2] = { MTK_DISP_PWM, 2, NULL },
[DDP_COMPONENT_RDMA0] = { MTK_DISP_RDMA, 0, NULL },
[DDP_COMPONENT_RDMA1] = { MTK_DISP_RDMA, 1, NULL },
[DDP_COMPONENT_RDMA2] = { MTK_DISP_RDMA, 2, NULL },
[DDP_COMPONENT_UFOE] = { MTK_DISP_UFOE, 0, &ddp_ufoe },
[DDP_COMPONENT_WDMA0] = { MTK_DISP_WDMA, 0, NULL },
[DDP_COMPONENT_WDMA1] = { MTK_DISP_WDMA, 1, NULL },
};
int mtk_ddp_comp_get_id(struct device_node *node,
enum mtk_ddp_comp_type comp_type)
{
int id = of_alias_get_id(node, mtk_ddp_comp_stem[comp_type]);
int i;
for (i = 0; i < ARRAY_SIZE(mtk_ddp_matches); i++) {
if (comp_type == mtk_ddp_matches[i].type &&
(id < 0 || id == mtk_ddp_matches[i].alias_id))
return i;
}
return -EINVAL;
}
int mtk_ddp_comp_init(struct device *dev, struct device_node *node,
struct mtk_ddp_comp *comp, enum mtk_ddp_comp_id comp_id,
const struct mtk_ddp_comp_funcs *funcs)
{
enum mtk_ddp_comp_type type;
struct device_node *larb_node;
struct platform_device *larb_pdev;
if (comp_id < 0 || comp_id >= DDP_COMPONENT_ID_MAX)
return -EINVAL;
type = mtk_ddp_matches[comp_id].type;
comp->id = comp_id;
comp->funcs = funcs ?: mtk_ddp_matches[comp_id].funcs;
if (comp_id == DDP_COMPONENT_BLS ||
comp_id == DDP_COMPONENT_DPI0 ||
comp_id == DDP_COMPONENT_DPI1 ||
comp_id == DDP_COMPONENT_DSI0 ||
comp_id == DDP_COMPONENT_DSI1 ||
comp_id == DDP_COMPONENT_DSI2 ||
comp_id == DDP_COMPONENT_DSI3 ||
comp_id == DDP_COMPONENT_PWM0) {
comp->regs = NULL;
comp->clk = NULL;
comp->irq = 0;
return 0;
}
comp->regs = of_iomap(node, 0);
comp->irq = of_irq_get(node, 0);
comp->clk = of_clk_get(node, 0);
if (IS_ERR(comp->clk))
return PTR_ERR(comp->clk);
/* Only DMA capable components need the LARB property */
comp->larb_dev = NULL;
if (type != MTK_DISP_OVL &&
type != MTK_DISP_RDMA &&
type != MTK_DISP_WDMA)
return 0;
larb_node = of_parse_phandle(node, "mediatek,larb", 0);
if (!larb_node) {
dev_err(dev,
"Missing mediadek,larb phandle in %pOF node\n", node);
return -EINVAL;
}
larb_pdev = of_find_device_by_node(larb_node);
if (!larb_pdev) {
dev_warn(dev, "Waiting for larb device %pOF\n", larb_node);
of_node_put(larb_node);
return -EPROBE_DEFER;
}
of_node_put(larb_node);
comp->larb_dev = &larb_pdev->dev;
return 0;
}
int mtk_ddp_comp_register(struct drm_device *drm, struct mtk_ddp_comp *comp)
{
struct mtk_drm_private *private = drm->dev_private;
if (private->ddp_comp[comp->id])
return -EBUSY;
private->ddp_comp[comp->id] = comp;
return 0;
}
void mtk_ddp_comp_unregister(struct drm_device *drm, struct mtk_ddp_comp *comp)
{
struct mtk_drm_private *private = drm->dev_private;
private->ddp_comp[comp->id] = NULL;
}
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