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SubjectRe: [PATCH v2 8/9] drm/mediatek: add DSC support for mt8195
Hi, Jason:

jason-jh.lin <jason-jh.lin@mediatek.com> 於 2021年7月10日 週六 下午7:38寫道:
>
> Add DSC module file.

Introduce DSC here.

>
> Signed-off-by: jason-jh.lin <jason-jh.lin@mediatek.com>
> ---
> drivers/gpu/drm/mediatek/Makefile | 1 +
> drivers/gpu/drm/mediatek/mtk_disp_drv.h | 8 +
> drivers/gpu/drm/mediatek/mtk_disp_dsc.c | 205 ++++++++++++++++++++
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 13 ++
> 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 +
> 7 files changed, 233 insertions(+)
> create mode 100644 drivers/gpu/drm/mediatek/mtk_disp_dsc.c
>
> diff --git a/drivers/gpu/drm/mediatek/Makefile b/drivers/gpu/drm/mediatek/Makefile
> index dc54a7a69005..a1b239135c8f 100644
> --- a/drivers/gpu/drm/mediatek/Makefile
> +++ b/drivers/gpu/drm/mediatek/Makefile
> @@ -5,6 +5,7 @@ mediatek-drm-y := mtk_disp_ccorr.o \
> mtk_disp_gamma.o \
> mtk_disp_ovl.o \
> mtk_disp_rdma.o \
> + mtk_disp_dsc.o \
> mtk_drm_crtc.o \
> mtk_drm_ddp_comp.o \
> mtk_drm_drv.o \
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> index cafd9df2d63b..128d9fdbaf9e 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> @@ -89,4 +89,12 @@ void mtk_rdma_enable_vblank(struct device *dev,
> void *vblank_cb_data);
> void mtk_rdma_disable_vblank(struct device *dev);
>
> +int mtk_dsc_clk_enable(struct device *dev);
> +void mtk_dsc_clk_disable(struct device *dev);
> +void mtk_dsc_config(struct device *dev, unsigned int width,
> + unsigned int height, unsigned int vrefresh,
> + unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> +void mtk_dsc_start(struct device *dev);
> +void mtk_dsc_stop(struct device *dev);
> +
> #endif
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_dsc.c b/drivers/gpu/drm/mediatek/mtk_disp_dsc.c
> new file mode 100644
> index 000000000000..61187f824c19
> --- /dev/null
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_dsc.c
> @@ -0,0 +1,205 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2021 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/pm_runtime.h>
> +#include <linux/soc/mediatek/mtk-cmdq.h>
> +
> +#include "mtk_drm_crtc.h"
> +#include "mtk_drm_ddp_comp.h"
> +#include "mtk_drm_gem.h"
> +#include "mtk_disp_drv.h"
> +
> +#define DISP_REG_DSC_CON 0x0000
> +#define DSC_EN BIT(0)
> +#define DSC_DUAL_INOUT BIT(2)
> +#define DSC_IN_SRC_SEL BIT(3)
> +#define DSC_BYPASS BIT(4)
> +#define DSC_RELAY BIT(5)
> +#define DSC_EMPTY_FLAG_SEL 0xc000
> +#define DSC_UFOE_SEL BIT(16)
> +#define DISP_REG_DSC_OBUF 0x0070
> +
> +/**
> + * struct mtk_disp_dsc - DISP_DSC driver structure
> + * @clk - clk of dsc hardware
> + * @regs - hardware register address of dsc
> + * @comp_id - enum type of component id
> + * @cmdq_reg - structure containing cmdq hardware resource
> + */
> +struct mtk_disp_dsc {
> + struct clk *clk;
> + void __iomem *regs;
> + enum mtk_ddp_comp_id comp_id;

comp_id is useless, so remove.

> + struct cmdq_client_reg cmdq_reg;
> +};
> +
> +void mtk_dsc_start(struct device *dev)
> +{
> + struct mtk_disp_dsc *dsc = dev_get_drvdata(dev);
> + void __iomem *baddr = dsc->regs;
> + int ret = 0;
> +
> + ret = pm_runtime_get_sync(dev);

I think no sub driver enable the power, so sync with other sub driver.

> + if (ret < 0)
> + DRM_ERROR("Failed to enable power domain: %d\n", ret);
> +
> + mtk_ddp_write_mask(NULL, DSC_EN,
> + &dsc->cmdq_reg, baddr,
> + DISP_REG_DSC_CON, DSC_EN);
> +
> + pr_debug("dsc_start:0x%x\n", readl(baddr + DISP_REG_DSC_CON));

No sub driver print this, sync with other sub driver.

> +}
> +
> +void mtk_dsc_stop(struct device *dev)
> +{
> + struct mtk_disp_dsc *dsc = dev_get_drvdata(dev);
> + void __iomem *baddr = dsc->regs;
> + int ret = 0;
> +
> + mtk_ddp_write_mask(NULL, 0x0, &dsc->cmdq_reg, baddr,
> + DISP_REG_DSC_CON, DSC_EN);
> +
> + pr_debug("dsc_stop:0x%x\n", readl(baddr + DISP_REG_DSC_CON));

Why we need this information?

> +
> + ret = pm_runtime_put(dev);

Ditto as pm_runtime_get_sync().

> + if (ret < 0)
> + DRM_ERROR("Failed to disable power domain: %d\n", ret);
> +}
> +
> +int mtk_dsc_clk_enable(struct device *dev)
> +{
> + struct mtk_disp_dsc *dsc = dev_get_drvdata(dev);
> +
> + return clk_prepare_enable(dsc->clk);
> +}
> +
> +void mtk_dsc_clk_disable(struct device *dev)
> +{
> + struct mtk_disp_dsc *dsc = dev_get_drvdata(dev);
> +
> + clk_disable_unprepare(dsc->clk);
> +}
> +
> +void mtk_dsc_config(struct device *dev, unsigned int w,
> + unsigned int h, unsigned int vrefresh,
> + unsigned int bpc, struct cmdq_pkt *handle)
> +{
> + struct mtk_disp_dsc *dsc = dev_get_drvdata(dev);
> +
> + /* dsc bypass mode */
> + mtk_ddp_write_mask(handle, DSC_BYPASS,
> + &dsc->cmdq_reg, dsc->regs,
> + DISP_REG_DSC_CON, DSC_BYPASS);
> + mtk_ddp_write_mask(handle, DSC_UFOE_SEL,
> + &dsc->cmdq_reg, dsc->regs,
> + DISP_REG_DSC_CON, DSC_UFOE_SEL);
> + mtk_ddp_write_mask(handle, DSC_DUAL_INOUT,
> + &dsc->cmdq_reg, dsc->regs,
> + DISP_REG_DSC_CON, DSC_DUAL_INOUT);
> +}
> +
> +static int mtk_disp_dsc_bind(struct device *dev, struct device *master,
> + void *data)
> +{
> + return 0;
> +}
> +
> +static void mtk_disp_dsc_unbind(struct device *dev, struct device *master,
> + void *data)
> +{
> +}
> +
> +static const struct component_ops mtk_disp_dsc_component_ops = {
> + .bind = mtk_disp_dsc_bind,
> + .unbind = mtk_disp_dsc_unbind,
> +};
> +
> +static int mtk_disp_dsc_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct resource *res;
> + struct mtk_disp_dsc *priv;
> + enum mtk_ddp_comp_id comp_id;
> + int irq;
> + 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_DSC);
> + if ((int)comp_id < 0) {
> + dev_err(dev, "Failed to identify by alias: %d\n", comp_id);
> + return comp_id;
> + }
> +
> + priv->comp_id = comp_id;
> +
> + irq = platform_get_irq(pdev, 0);

Why do you get irq?

> + if (irq < 0)
> + return irq;
> +
> + priv->clk = devm_clk_get(dev, NULL);
> + if (IS_ERR(priv->clk)) {
> + dev_err(dev, "failed to get dsc clk\n");
> + return PTR_ERR(priv->clk);
> + }
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + priv->regs = devm_ioremap_resource(dev, res);
> + if (IS_ERR(priv->regs)) {
> + dev_err(dev, "failed to ioremap dsc\n");
> + return PTR_ERR(priv->regs);
> + }
> +
> +#if IS_REACHABLE(CONFIG_MTK_CMDQ)
> + ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
> + if (ret)
> + dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
> +#endif
> +
> + platform_set_drvdata(pdev, priv);
> +
> + pm_runtime_enable(dev);

Sync with other sub driver.

> +
> + ret = component_add(dev, &mtk_disp_dsc_component_ops);
> + if (ret != 0) {
> + dev_err(dev, "Failed to add component: %d\n", ret);
> + pm_runtime_disable(dev);
> + }
> +
> + return ret;
> +}
> +
> +static int mtk_disp_dsc_remove(struct platform_device *pdev)
> +{
> + component_del(&pdev->dev, &mtk_disp_dsc_component_ops);
> +
> + pm_runtime_disable(&pdev->dev);

Sync with other sub driver.

> +
> + return 0;
> +}
> +
> +static const struct of_device_id mtk_disp_dsc_driver_dt_match[] = {
> + { .compatible = "mediatek,mt8195-disp-dsc", },
> + {},
> +};
> +
> +MODULE_DEVICE_TABLE(of, mtk_disp_dsc_driver_dt_match);
> +
> +struct platform_driver mtk_disp_dsc_driver = {
> + .probe = mtk_disp_dsc_probe,
> + .remove = mtk_disp_dsc_remove,
> + .driver = {
> + .name = "mediatek-disp-dsc",
> + .owner = THIS_MODULE,
> + .of_match_table = mtk_disp_dsc_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 75bc00e17fc4..d0b0f41dfe5a 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> @@ -333,6 +333,14 @@ static const struct mtk_ddp_comp_funcs ddp_rdma = {
> .layer_config = mtk_rdma_layer_config,
> };
>
> +static const struct mtk_ddp_comp_funcs ddp_dsc = {
> + .config = mtk_dsc_config,
> + .start = mtk_dsc_start,
> + .stop = mtk_dsc_stop,
> + .clk_enable = mtk_dsc_clk_enable,
> + .clk_disable = mtk_dsc_clk_disable,
> +};
> +
> static const struct mtk_ddp_comp_funcs ddp_ufoe = {
> .clk_enable = mtk_ddp_clk_enable,
> .clk_disable = mtk_ddp_clk_disable,
> @@ -356,6 +364,7 @@ static const char * const mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX] = {
> [MTK_DISP_MUTEX] = "mutex",
> [MTK_DISP_OD] = "od",
> [MTK_DISP_BLS] = "bls",
> + [MTK_DISP_DSC] = "dsc",
> };
>
> struct mtk_ddp_comp_match {
> @@ -391,6 +400,9 @@ static const struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
> [DDP_COMPONENT_RDMA0] = { MTK_DISP_RDMA, 0, &ddp_rdma },
> [DDP_COMPONENT_RDMA1] = { MTK_DISP_RDMA, 1, &ddp_rdma },
> [DDP_COMPONENT_RDMA2] = { MTK_DISP_RDMA, 2, &ddp_rdma },
> + [DDP_COMPONENT_DSC0] = { MTK_DISP_DSC, 0, &ddp_dsc },
> + [DDP_COMPONENT_DSC1] = { MTK_DISP_DSC, 1, &ddp_dsc },
> + [DDP_COMPONENT_DSC1_VIRTUAL0] = { MTK_DISP_DSC, -1, &ddp_dsc },

Alphabetic order.

> [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 },
> @@ -509,6 +521,7 @@ int mtk_ddp_comp_init(struct device_node *node, struct mtk_ddp_comp *comp,
> type == MTK_DISP_CCORR ||
> type == MTK_DISP_COLOR ||
> type == MTK_DISP_GAMMA ||
> + type == MTK_DISP_DSC ||

Alphabetic order.

> type == MTK_DPI ||
> type == MTK_DSI ||
> type == MTK_DISP_OVL ||
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> index bb914d976cf5..661fb620e266 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> @@ -34,6 +34,7 @@ enum mtk_ddp_comp_type {
> MTK_DISP_MUTEX,
> MTK_DISP_OD,
> MTK_DISP_BLS,
> + MTK_DISP_DSC,
> MTK_DDP_COMP_TYPE_MAX,
> };
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index d6f6d1bdad85..7dfca63c1042 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -446,6 +446,8 @@ static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
> .data = (void *)MTK_DISP_GAMMA, },
> { .compatible = "mediatek,mt8183-disp-dither",
> .data = (void *)MTK_DISP_DITHER },
> + { .compatible = "mediatek,mt8195-disp-dsc",
> + .data = (void *)MTK_DISP_DSC },
> { .compatible = "mediatek,mt8173-disp-ufoe",
> .data = (void *)MTK_DISP_UFOE },
> { .compatible = "mediatek,mt2701-dsi",
> @@ -563,6 +565,7 @@ static int mtk_drm_probe(struct platform_device *pdev)
> if (comp_type == MTK_DISP_CCORR ||
> comp_type == MTK_DISP_COLOR ||
> comp_type == MTK_DISP_GAMMA ||
> + comp_type == MTK_DISP_DSC ||
> comp_type == MTK_DISP_OVL ||
> comp_type == MTK_DISP_OVL_2L ||
> comp_type == MTK_DISP_RDMA ||
> @@ -667,6 +670,7 @@ static struct platform_driver * const mtk_drm_drivers[] = {
> &mtk_disp_rdma_driver,
> &mtk_dpi_driver,
> &mtk_drm_platform_driver,
> + &mtk_disp_dsc_driver,

Alphabetic order.

> &mtk_dsi_driver,
> };
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> index 637f5669e895..8b722330ef7d 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> @@ -51,6 +51,7 @@ 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_disp_dsc_driver;

Alphabetic order.

Regards,
Chun-Kuang.

> extern struct platform_driver mtk_dpi_driver;
> extern struct platform_driver mtk_dsi_driver;
>
> --
> 2.18.0
>

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