[PATCH v6 6/7] drm/mediatek: add MERGE support for mediatek-drm
Chun-Kuang Hu
chunkuang.hu at kernel.org
Fri Aug 6 10:10:53 PDT 2021
Hi, Jason:
jason-jh.lin <jason-jh.lin at mediatek.com> 於 2021年8月6日 週五 上午4:52寫道：
>
> Add MERGE engine file:
> MERGE module is used to merge two slice-per-line inputs
> into one side-by-side output.
>
> Signed-off-by: jason-jh.lin <jason-jh.lin at mediatek.com>
> ---
> This patch is base on [1]
>
> [1] dt-bindings: mediatek: display: add mt8195 SoC binding
> https://patchwork.kernel.org/project/linux-mediatek/patch/20210805171346.24249-5-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_merge.c | 263 ++++++++++++++++++++
> 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, 277 insertions(+), 1 deletion(-)
> create mode 100644 drivers/gpu/drm/mediatek/mtk_disp_merge.c
>
> diff --git a/drivers/gpu/drm/mediatek/Makefile b/drivers/gpu/drm/mediatek/Makefile
> index dc54a7a69005..538e0087a44c 100644
> --- a/drivers/gpu/drm/mediatek/Makefile
> +++ b/drivers/gpu/drm/mediatek/Makefile
> @@ -3,6 +3,7 @@
> mediatek-drm-y := mtk_disp_ccorr.o \
> mtk_disp_color.o \
> mtk_disp_gamma.o \
> + mtk_disp_merge.o \
> mtk_disp_ovl.o \
> mtk_disp_rdma.o \
> mtk_drm_crtc.o \
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> index cafd9df2d63b..f407cd9d873e 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> @@ -46,6 +46,14 @@ void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state);
> void mtk_gamma_start(struct device *dev);
> void mtk_gamma_stop(struct device *dev);
>
> +int mtk_merge_clk_enable(struct device *dev);
> +void mtk_merge_clk_disable(struct device *dev);
> +void mtk_merge_config(struct device *dev, unsigned int width,
> + unsigned int height, unsigned int vrefresh,
> + unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> +void mtk_merge_start(struct device *dev);
> +void mtk_merge_stop(struct device *dev);
> +
> void mtk_ovl_bgclr_in_on(struct device *dev);
> void mtk_ovl_bgclr_in_off(struct device *dev);
> void mtk_ovl_bypass_shadow(struct device *dev);
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_merge.c b/drivers/gpu/drm/mediatek/mtk_disp_merge.c
> new file mode 100644
> index 000000000000..f3d262792054
> --- /dev/null
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_merge.c
> @@ -0,0 +1,263 @@
> +// 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/soc/mediatek/mtk-cmdq.h>
> +
> +#include "mtk_drm_ddp_comp.h"
> +#include "mtk_drm_drv.h"
> +#include "mtk_disp_drv.h"
> +
> +#define DISP_REG_MERGE_CTRL 0x000
> +#define MERGE_EN 1
One more indent for the bitwise value.
> +#define DISP_REG_MERGE_CFG_0 0x010
> +#define DISP_REG_MERGE_CFG_4 0x020
> +#define DISP_REG_MERGE_CFG_10 0x038
> +/* no swap */
> +#define SWAP_MODE 0
> +#define FLD_SWAP_MODE GENMASK(4, 0)
> +#define DISP_REG_MERGE_CFG_12 0x040
> +#define CFG_10_10_1PI_2PO_BUF_MODE 6
> +#define CFG_10_10_2PI_2PO_BUF_MODE 8
> +#define FLD_CFG_MERGE_MODE GENMASK(4, 0)
> +#define DISP_REG_MERGE_CFG_24 0x070
> +#define DISP_REG_MERGE_CFG_25 0x074
> +#define DISP_REG_MERGE_CFG_36 0x0a0
> +#define ULTRA_EN 1
> +#define PREULTRA_EN 1
> +#define HALT_FOR_DVFS_EN 0
> +#define FLD_ULTRA_EN GENMASK(0, 0)
> +#define FLD_PREULTRA_EN GENMASK(4, 4)
> +#define FLD_HALT_FOR_DVFS_EN GENMASK(8, 8)
> +#define DISP_REG_MERGE_CFG_37 0x0a4
> +/* 0: Off, 1: SRAM0, 2: SRAM1, 3: SRAM0 + SRAM1 */
> +#define BUFFER_MODE 3
> +#define FLD_BUFFER_MODE GENMASK(1, 0)
> +#define DISP_REG_MERGE_CFG_38 0x0a8
> +#define FLD_VDE_BLOCK_ULTRA GENMASK(0, 0)
> +#define FLD_VALID_TH_BLOCK_ULTRA GENMASK(4, 4)
> +#define FLD_ULTRA_FIFO_VALID_TH GENMASK(31, 16)
> +#define DISP_REG_MERGE_CFG_39 0x0ac
> +#define FLD_NVDE_FORCE_PREULTRA GENMASK(8, 8)
> +#define FLD_NVALID_TH_FORCE_PREULTRA GENMASK(12, 12)
> +#define FLD_PREULTRA_FIFO_VALID_TH GENMASK(31, 16)
> +#define DISP_REG_MERGE_CFG_40 0x0b0
> +/* 6 us, 600M pixel/sec */
> +#define ULTRA_TH_LOW (6 * 600)
> +/* 8 us, 600M pixel/sec */
> +#define ULTRA_TH_HIGH (8 * 600)
> +#define FLD_ULTRA_TH_LOW GENMASK(15, 0)
> +#define FLD_ULTRA_TH_HIGH GENMASK(31, 16)
> +#define DISP_REG_MERGE_CFG_41 0x0b4
> +/* 8 us, 600M pixel/sec */
> +#define PREULTRA_TH_LOW (8 * 600)
> +/* 9 us, 600M pixel/sec */
Add comment that "6 us ~ 9us is experience value and max mmsys clock
frequency is 594MHz", and I think you should use 594 instead of 600.
Regards,
Chun-Kuang.
> +#define PREULTRA_TH_HIGH (9 * 600)
> +#define FLD_PREULTRA_TH_LOW GENMASK(15, 0)
> +#define FLD_PREULTRA_TH_HIGH GENMASK(31, 16)
> +
> +struct mtk_disp_merge {
> + void __iomem *regs;
> + struct clk *clk;
> + struct clk *async_clk;
> + struct cmdq_client_reg cmdq_reg;
> + bool fifo_en;
> +};
> +
> +void mtk_merge_start(struct device *dev)
> +{
> + struct mtk_disp_merge *priv = dev_get_drvdata(dev);
> +
> + writel(MERGE_EN, priv->regs + DISP_REG_MERGE_CTRL);
> +}
> +
> +void mtk_merge_stop(struct device *dev)
> +{
> + struct mtk_disp_merge *priv = dev_get_drvdata(dev);
> +
> + writel(0x0, priv->regs + DISP_REG_MERGE_CTRL);
> +}
> +
> +static void mtk_merge_fifo_setting(struct mtk_disp_merge *priv,
> + struct cmdq_pkt *handle)
> +{
> + mtk_ddp_write_mask(handle, ULTRA_EN | PREULTRA_EN << 4 | HALT_FOR_DVFS_EN << 8,
> + &priv->cmdq_reg, priv->regs, DISP_REG_MERGE_CFG_36,
> + FLD_ULTRA_EN | FLD_PREULTRA_EN | FLD_HALT_FOR_DVFS_EN);
> +
> + mtk_ddp_write_mask(handle, BUFFER_MODE,
> + &priv->cmdq_reg, priv->regs, DISP_REG_MERGE_CFG_37,
> + FLD_BUFFER_MODE);
> +
> + mtk_ddp_write_mask(handle, 0,
> + &priv->cmdq_reg, priv->regs, DISP_REG_MERGE_CFG_38,
> + FLD_VDE_BLOCK_ULTRA | FLD_VALID_TH_BLOCK_ULTRA |
> + FLD_ULTRA_FIFO_VALID_TH);
> +
> + mtk_ddp_write_mask(handle, 0,
> + &priv->cmdq_reg, priv->regs, DISP_REG_MERGE_CFG_39,
> + FLD_NVDE_FORCE_PREULTRA | FLD_NVALID_TH_FORCE_PREULTRA |
> + FLD_PREULTRA_FIFO_VALID_TH);
> +
> + mtk_ddp_write_mask(handle, ULTRA_TH_LOW | ULTRA_TH_HIGH << 16,
> + &priv->cmdq_reg, priv->regs, DISP_REG_MERGE_CFG_40,
> + FLD_ULTRA_TH_LOW | FLD_ULTRA_TH_HIGH);
> +
> + mtk_ddp_write_mask(handle, PREULTRA_TH_LOW | PREULTRA_TH_HIGH << 16,
> + &priv->cmdq_reg, priv->regs, DISP_REG_MERGE_CFG_41,
> + FLD_PREULTRA_TH_LOW | FLD_PREULTRA_TH_HIGH);
> +}
> +
> +void mtk_merge_config(struct device *dev, unsigned int w,
> + unsigned int h, unsigned int vrefresh,
> + unsigned int bpc, struct cmdq_pkt *handle)
> +{
> + struct mtk_disp_merge *priv = dev_get_drvdata(dev);
> + unsigned int mode = CFG_10_10_1PI_2PO_BUF_MODE;
> +
> + if (!h || !w) {
> + dev_err(dev, "%s: input width(%d) or height(%d) is invalid\n", __func__, w, h);
> + return;
> + }
> +
> + if (priv->fifo_en) {
> + mtk_merge_fifo_setting(priv, handle);
> + mode = CFG_10_10_2PI_2PO_BUF_MODE;
> + }
> +
> + mtk_ddp_write(handle, h << 16 | w, &priv->cmdq_reg, priv->regs,
> + DISP_REG_MERGE_CFG_0);
> + mtk_ddp_write(handle, h << 16 | w, &priv->cmdq_reg, priv->regs,
> + DISP_REG_MERGE_CFG_4);
> + mtk_ddp_write(handle, h << 16 | w, &priv->cmdq_reg, priv->regs,
> + DISP_REG_MERGE_CFG_24);
> + mtk_ddp_write(handle, h << 16 | w, &priv->cmdq_reg, priv->regs,
> + DISP_REG_MERGE_CFG_25);
> + mtk_ddp_write_mask(handle, SWAP_MODE, &priv->cmdq_reg, priv->regs,
> + DISP_REG_MERGE_CFG_10, FLD_SWAP_MODE);
> + mtk_ddp_write_mask(handle, mode, &priv->cmdq_reg, priv->regs,
> + DISP_REG_MERGE_CFG_12, FLD_CFG_MERGE_MODE);
> +}
> +
> +int mtk_merge_clk_enable(struct device *dev)
> +{
> + int ret = 0;
> + struct mtk_disp_merge *priv = dev_get_drvdata(dev);
> +
> + ret = clk_prepare_enable(priv->clk);
> + if (ret)
> + pr_err("merge clk prepare enable failed\n");
> +
> + if (priv->async_clk) {
> + ret = clk_prepare_enable(priv->async_clk);
> + if (ret)
> + pr_err("async clk prepare enable failed\n");
> + }
> +
> + return ret;
> +}
> +
> +void mtk_merge_clk_disable(struct device *dev)
> +{
> + struct mtk_disp_merge *priv = dev_get_drvdata(dev);
> +
> + if (priv->async_clk)
> + clk_disable_unprepare(priv->async_clk);
> +
> + clk_disable_unprepare(priv->clk);
> +}
> +
> +static int mtk_disp_merge_bind(struct device *dev, struct device *master,
> + void *data)
> +{
> + return 0;
> +}
> +
> +static void mtk_disp_merge_unbind(struct device *dev, struct device *master,
> + void *data)
> +{
> +}
> +
> +static const struct component_ops mtk_disp_merge_component_ops = {
> + .bind = mtk_disp_merge_bind,
> + .unbind = mtk_disp_merge_unbind,
> +};
> +
> +static int mtk_disp_merge_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct resource *res;
> + struct mtk_disp_merge *priv;
> + int ret;
> +
> + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> + if (!priv)
> + return -ENOMEM;
> +
> + 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 merge\n");
> + return PTR_ERR(priv->regs);
> + }
> +
> + priv->clk = devm_clk_get(dev, NULL);
> + if (IS_ERR(priv->clk)) {
> + dev_err(dev, "failed to get merge clk\n");
> + return PTR_ERR(priv->clk);
> + }
> +
> + priv->async_clk = of_clk_get(dev->of_node, 1);
> + if (IS_ERR(priv->async_clk)) {
> + ret = PTR_ERR(priv->async_clk);
> + dev_dbg(dev, "No merge async clock: %d\n", ret);
> + priv->async_clk = NULL;
> + }
> +
> +#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
> +
> + priv->fifo_en = of_property_read_bool(dev->of_node,
> + "mediatek,merge-fifo-en");
> +
> + platform_set_drvdata(pdev, priv);
> +
> + ret = component_add(dev, &mtk_disp_merge_component_ops);
> + if (ret != 0)
> + dev_err(dev, "Failed to add component: %d\n", ret);
> +
> + return ret;
> +}
> +
> +static int mtk_disp_merge_remove(struct platform_device *pdev)
> +{
> + component_del(&pdev->dev, &mtk_disp_merge_component_ops);
> +
> + return 0;
> +}
> +
> +static const struct of_device_id mtk_disp_merge_driver_dt_match[] = {
> + { .compatible = "mediatek,mt8195-disp-merge", },
> + {},
> +};
> +
> +MODULE_DEVICE_TABLE(of, mtk_disp_merge_driver_dt_match);
> +
> +struct platform_driver mtk_disp_merge_driver = {
> + .probe = mtk_disp_merge_probe,
> + .remove = mtk_disp_merge_remove,
> + .driver = {
> + .name = "mediatek-disp-merge",
> + .owner = THIS_MODULE,
> + .of_match_table = mtk_disp_merge_driver_dt_match,
> + },
> +};
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> index 560be6bc9d0e..b42a47c06956 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> @@ -25,6 +25,7 @@ enum mtk_ddp_comp_type {
> MTK_DISP_DITHER,
> MTK_DISP_DSC,
> MTK_DISP_GAMMA,
> + MTK_DISP_MERGE,
> MTK_DISP_MUTEX,
> MTK_DISP_OD,
> MTK_DISP_OVL,
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index a95dc1006b82..5eb9c0a04447 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -532,13 +532,14 @@ static int mtk_drm_probe(struct platform_device *pdev)
> private->comp_node[comp_id] = of_node_get(node);
>
> /*
> - * Currently only the CCORR, COLOR, GAMMA, OVL, RDMA, DSI, and DPI
> + * Currently only the CCORR, COLOR, GAMMA, MERGE, 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_CCORR ||
> comp_type == MTK_DISP_COLOR ||
> comp_type == MTK_DISP_GAMMA ||
> + comp_type == MTK_DISP_MERGE ||
> comp_type == MTK_DISP_OVL ||
> comp_type == MTK_DISP_OVL_2L ||
> comp_type == MTK_DISP_RDMA ||
> @@ -639,6 +640,7 @@ static struct platform_driver * const mtk_drm_drivers[] = {
> &mtk_disp_ccorr_driver,
> &mtk_disp_color_driver,
> &mtk_disp_gamma_driver,
> + &mtk_disp_merge_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 637f5669e895..0fa417219a69 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> @@ -49,6 +49,7 @@ struct mtk_drm_private {
> extern struct platform_driver mtk_disp_ccorr_driver;
> extern struct platform_driver mtk_disp_color_driver;
> extern struct platform_driver mtk_disp_gamma_driver;
> +extern struct platform_driver mtk_disp_merge_driver;
> extern struct platform_driver mtk_disp_ovl_driver;
> extern struct platform_driver mtk_disp_rdma_driver;
> extern struct platform_driver mtk_dpi_driver;
> --
> 2.18.0
>
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