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Message-ID: <CAAOTY_9Gt1Pd-qm0gwdMqmiWSn6v46J8cBirU7rR+6R-LH3KGQ@mail.gmail.com>
Date: Thu, 7 Jan 2021 18:25:14 +0800
From: Chun-Kuang Hu <chunkuang.hu@...nel.org>
To: Yongqiang Niu <yongqiang.niu@...iatek.com>
Cc: CK Hu <ck.hu@...iatek.com>, Philipp Zabel <p.zabel@...gutronix.de>,
Rob Herring <robh+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Mark Rutland <mark.rutland@....com>,
DTML <devicetree@...r.kernel.org>,
David Airlie <airlied@...ux.ie>,
linux-kernel <linux-kernel@...r.kernel.org>,
DRI Development <dri-devel@...ts.freedesktop.org>,
Project_Global_Chrome_Upstream_Group@...iatek.com,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@...ts.infradead.org>,
Daniel Vetter <daniel@...ll.ch>,
Hsin-Yi Wang <hsinyi@...omium.org>,
Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v9, 07/11] drm/mediatek: separate gamma module
Hi, Yongqiang:
Yongqiang Niu <yongqiang.niu@...iatek.com> 於 2021年1月7日 週四 上午11:12寫道：
>
> mt8183 gamma module will different with mt8173
> separate gamma for add private data
I've applied series "Decouple Mediatek DRM sub driver" [1] into
mediatek-drm-next [2] and this patch would conflict with
mediatek-drm-next, so please rebase this series onto
mediatek-drm-next.
[1] https://patchwork.kernel.org/project/linux-mediatek/list/?series=399915
[2] https://git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux.git/log/?h=mediatek-drm-next
Regards,
Chun-Kuang.
>
> Signed-off-by: Yongqiang Niu <yongqiang.niu@...iatek.com>
> ---
> drivers/gpu/drm/mediatek/Makefile | 1 +
> drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 185 ++++++++++++++++++++++++++++
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 58 +--------
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> drivers/gpu/drm/mediatek/mtk_drm_drv.c | 4 +-
> drivers/gpu/drm/mediatek/mtk_drm_drv.h | 1 +
> 6 files changed, 192 insertions(+), 58 deletions(-)
> create mode 100644 drivers/gpu/drm/mediatek/mtk_disp_gamma.c
>
> diff --git a/drivers/gpu/drm/mediatek/Makefile b/drivers/gpu/drm/mediatek/Makefile
> index a892ede..17a08e2 100644
> --- a/drivers/gpu/drm/mediatek/Makefile
> +++ b/drivers/gpu/drm/mediatek/Makefile
> @@ -1,6 +1,7 @@
> # SPDX-License-Identifier: GPL-2.0
>
> mediatek-drm-y := mtk_disp_color.o \
> + mtk_disp_gamma.o \
> mtk_disp_ovl.o \
> mtk_disp_rdma.o \
> mtk_drm_crtc.o \
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> new file mode 100644
> index 0000000..8501821
> --- /dev/null
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> @@ -0,0 +1,185 @@
> +/*
> + * SPDX-License-Identifier:
> + *
> + * Copyright (c) 2020 MediaTek Inc.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/component.h>
> +#include <linux/of_device.h>
> +#include <linux/of_irq.h>
> +#include <linux/platform_device.h>
> +#include <linux/soc/mediatek/mtk-cmdq.h>
> +
> +#include "mtk_drm_crtc.h"
> +#include "mtk_drm_ddp_comp.h"
> +
> +#define DISP_GAMMA_EN 0x0000
> +#define GAMMA_EN BIT(0)
> +#define DISP_GAMMA_CFG 0x0020
> +#define GAMMA_LUT_EN BIT(1)
> +#define DISP_GAMMA_SIZE 0x0030
> +#define DISP_GAMMA_LUT 0x0700
> +
> +#define LUT_10BIT_MASK 0x03ff
> +
> +struct mtk_disp_gamma_data {
> + u32 reserved;
> +};
> +
> +/**
> + * struct mtk_disp_gamma - DISP_GAMMA driver structure
> + * @ddp_comp - structure containing type enum and hardware resources
> + * @crtc - associated crtc to report irq events to
> + */
> +struct mtk_disp_gamma {
> + struct mtk_ddp_comp ddp_comp;
> + const struct mtk_disp_gamma_data *data;
> +};
> +
> +static inline struct mtk_disp_gamma *comp_to_gamma(struct mtk_ddp_comp *comp)
> +{
> + return container_of(comp, struct mtk_disp_gamma, ddp_comp);
> +}
> +
> +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 void mtk_gamma_config(struct mtk_ddp_comp *comp, unsigned int w,
> + unsigned int h, unsigned int vrefresh,
> + unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
> +{
> + struct mtk_disp_gamma *gamma = comp_to_gamma(comp);
> +
> + mtk_ddp_write(cmdq_pkt, h << 16 | w, comp, DISP_GAMMA_SIZE);
> +
> + mtk_dither_set(comp, bpc, DISP_GAMMA_CFG, cmdq_pkt);
> +}
> +
> +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 const struct mtk_ddp_comp_funcs mtk_disp_gamma_funcs = {
> + .gamma_set = mtk_gamma_set,
> + .config = mtk_gamma_config,
> + .start = mtk_gamma_start,
> + .stop = mtk_gamma_stop,
> +};
> +
> +static int mtk_disp_gamma_bind(struct device *dev, struct device *master,
> + void *data)
> +{
> + struct mtk_disp_gamma *priv = dev_get_drvdata(dev);
> + struct drm_device *drm_dev = data;
> + int ret;
> +
> + ret = mtk_ddp_comp_register(drm_dev, &priv->ddp_comp);
> + if (ret < 0) {
> + dev_err(dev, "Failed to register component %pOF: %d\n",
> + dev->of_node, ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static void mtk_disp_gamma_unbind(struct device *dev, struct device *master,
> + void *data)
> +{
> + struct mtk_disp_gamma *priv = dev_get_drvdata(dev);
> + struct drm_device *drm_dev = data;
> +
> + mtk_ddp_comp_unregister(drm_dev, &priv->ddp_comp);
> +}
> +
> +static const struct component_ops mtk_disp_gamma_component_ops = {
> + .bind = mtk_disp_gamma_bind,
> + .unbind = mtk_disp_gamma_unbind,
> +};
> +
> +static int mtk_disp_gamma_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct mtk_disp_gamma *priv;
> + int comp_id;
> + int ret;
> +
> + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> + if (!priv)
> + return -ENOMEM;
> +
> + comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DISP_GAMMA);
> + if (comp_id < 0) {
> + dev_err(dev, "Failed to identify by alias: %d\n", comp_id);
> + return comp_id;
> + }
> +
> + ret = mtk_ddp_comp_init(dev, dev->of_node, &priv->ddp_comp, comp_id,
> + &mtk_disp_gamma_funcs);
> + if (ret) {
> + if (ret != -EPROBE_DEFER)
> + dev_err(dev, "Failed to initialize component: %d\n",
> + ret);
> +
> + return ret;
> + }
> +
> + priv->data = of_device_get_match_data(dev);
> +
> + platform_set_drvdata(pdev, priv);
> +
> + ret = component_add(dev, &mtk_disp_gamma_component_ops);
> + if (ret)
> + dev_err(dev, "Failed to add component: %d\n", ret);
> +
> + return ret;
> +}
> +
> +static int mtk_disp_gamma_remove(struct platform_device *pdev)
> +{
> + component_del(&pdev->dev, &mtk_disp_gamma_component_ops);
> +
> + return 0;
> +}
> +
> +static const struct of_device_id mtk_disp_gamma_driver_dt_match[] = {
> + { .compatible = "mediatek,mt8173-disp-gamma"},
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, mtk_disp_gamma_driver_dt_match);
> +
> +struct platform_driver mtk_disp_gamma_driver = {
> + .probe = mtk_disp_gamma_probe,
> + .remove = mtk_disp_gamma_remove,
> + .driver = {
> + .name = "mediatek-disp-gamma",
> + .owner = THIS_MODULE,
> + .of_match_table = mtk_disp_gamma_driver_dt_match,
> + },
> +};
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> index 3064eac..03589c9 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> @@ -55,11 +55,6 @@
> #define DITHER_RELAY_MODE BIT(0)
> #define DISP_DITHER_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)
> @@ -68,9 +63,6 @@
>
> #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)
> @@ -280,47 +272,6 @@ static void mtk_dither_stop(struct mtk_ddp_comp *comp)
> writel_relaxed(0x0, comp->regs + DISP_DITHER_EN);
> }
>
> -static void mtk_gamma_config(struct mtk_ddp_comp *comp, unsigned int w,
> - unsigned int h, unsigned int vrefresh,
> - unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
> -{
> - mtk_ddp_write(cmdq_pkt, h << 16 | w, comp, DISP_GAMMA_SIZE);
> - mtk_dither_set(comp, bpc, DISP_GAMMA_CFG, cmdq_pkt);
> -}
> -
> -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,
> @@ -341,13 +292,6 @@ static void mtk_gamma_set(struct mtk_ddp_comp *comp,
> .stop = mtk_dither_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,
> @@ -396,7 +340,7 @@ struct mtk_ddp_comp_match {
> [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_GAMMA] = { MTK_DISP_GAMMA, 0, NULL },
> [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 },
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> index 5aa52b7..178fae9 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> @@ -179,6 +179,7 @@ int mtk_ddp_comp_init(struct device *dev, struct device_node *comp_node,
> void mtk_ddp_comp_unregister(struct drm_device *drm, struct mtk_ddp_comp *comp);
> void mtk_dither_set(struct mtk_ddp_comp *comp, unsigned int bpc,
> unsigned int CFG, struct cmdq_pkt *cmdq_pkt);
> +void mtk_gamma_set(struct mtk_ddp_comp *comp, struct drm_crtc_state *state);
> enum mtk_ddp_comp_type mtk_ddp_comp_get_type(enum mtk_ddp_comp_id comp_id);
> void mtk_ddp_write(struct cmdq_pkt *cmdq_pkt, unsigned int value,
> struct mtk_ddp_comp *comp, unsigned int offset);
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index 2f717df..37fec25 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -488,11 +488,12 @@ static int mtk_drm_probe(struct platform_device *pdev)
> private->comp_node[comp_id] = of_node_get(node);
>
> /*
> - * Currently only the COLOR, OVL, RDMA, DSI, and DPI blocks have
> + * Currently only the COLOR, GAMMA, OVL, RDMA, DSI, and DPI blocks have
> * separate component platform drivers and initialize their own
> * DDP component structure. The others are initialized here.
> */
> if (comp_type == MTK_DISP_COLOR ||
> + comp_type == MTK_DISP_GAMMA ||
> comp_type == MTK_DISP_OVL ||
> comp_type == MTK_DISP_OVL_2L ||
> comp_type == MTK_DISP_RDMA ||
> @@ -606,6 +607,7 @@ static SIMPLE_DEV_PM_OPS(mtk_drm_pm_ops, mtk_drm_sys_suspend,
> static struct platform_driver * const mtk_drm_drivers[] = {
> &mtk_ddp_driver,
> &mtk_disp_color_driver,
> + &mtk_disp_gamma_driver,
> &mtk_disp_ovl_driver,
> &mtk_disp_rdma_driver,
> &mtk_dpi_driver,
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> index 5d771cf..bbd362b 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> @@ -48,6 +48,7 @@ struct mtk_drm_private {
>
> extern struct platform_driver mtk_ddp_driver;
> extern struct platform_driver mtk_disp_color_driver;
> +extern struct platform_driver mtk_disp_gamma_driver;
> extern struct platform_driver mtk_disp_ovl_driver;
> extern struct platform_driver mtk_disp_rdma_driver;
> extern struct platform_driver mtk_dpi_driver;
> --
> 1.8.1.1.dirty
> _______________________________________________
> Linux-mediatek mailing list
> Linux-mediatek@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-mediatek
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