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Message-ID: <20250321093435.94835-11-paul-pl.chen@mediatek.com>
Date: Fri, 21 Mar 2025 17:33:39 +0800
From: paul-pl.chen <paul-pl.chen@...iatek.com>
To: <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
<chunkuang.hu@...nel.org>, <angelogioacchino.delregno@...labora.com>
CC: <matthias.bgg@...il.com>, <p.zabel@...gutronix.de>,
<jason-jh.lin@...iatek.com>, <nancy.lin@...iatek.com>,
<singo.chang@...iatek.com>, <xiandong.wang@...iatek.com>,
<sirius.wang@...iatek.com>, <paul-pl.chen@...iatek.com>,
<sunny.shen@...iatek.com>, <fshao@...omium.org>, <treapking@...omium.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<dri-devel@...ts.freedesktop.org>, <linux-mediatek@...ts.infradead.org>,
<linux-arm-kernel@...ts.infradead.org>,
<Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH v2 10/15] drm/mediatek: add EXDMA support for MT8196
From: Nancy Lin <nancy.lin@...iatek.com>
EXDMA is a DMA engine for reading data from DRAM with
various DRAM footprints and data formats. For input
sources in certain color formats and color domains,
EXDMA also includes a color transfer function to
process pixels into a consistent color domain.
New Add: 6320385 Fix RG16 and refine RG24
Signed-off-by: Nancy Lin <nancy.lin@...iatek.com>
Signed-off-by: Paul-pl Chen <paul-pl.chen@...iatek.com>
---
drivers/gpu/drm/mediatek/Makefile | 1 +
drivers/gpu/drm/mediatek/mtk_ddp_comp.c | 1 +
drivers/gpu/drm/mediatek/mtk_ddp_comp.h | 1 +
drivers/gpu/drm/mediatek/mtk_disp_drv.h | 9 +
drivers/gpu/drm/mediatek/mtk_disp_exdma.c | 372 ++++++++++++++++++++++
drivers/gpu/drm/mediatek/mtk_drm_drv.c | 1 +
drivers/gpu/drm/mediatek/mtk_drm_drv.h | 1 +
7 files changed, 386 insertions(+)
create mode 100644 drivers/gpu/drm/mediatek/mtk_disp_exdma.c
diff --git a/drivers/gpu/drm/mediatek/Makefile b/drivers/gpu/drm/mediatek/Makefile
index 32a2ed6c0cfe..db92f4fb353d 100644
--- a/drivers/gpu/drm/mediatek/Makefile
+++ b/drivers/gpu/drm/mediatek/Makefile
@@ -5,6 +5,7 @@ mediatek-drm-y := mtk_crtc.o \
mtk_disp_aal.o \
mtk_disp_ccorr.o \
mtk_disp_color.o \
+ mtk_disp_exdma.o \
mtk_disp_gamma.o \
mtk_disp_merge.o \
mtk_disp_ovl.o \
diff --git a/drivers/gpu/drm/mediatek/mtk_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_ddp_comp.c
index edc6417639e6..3e0739d8e6f1 100644
--- a/drivers/gpu/drm/mediatek/mtk_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_ddp_comp.c
@@ -445,6 +445,7 @@ static const char * const mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX] = {
[MTK_DP_INTF] = "dp-intf",
[MTK_DPI] = "dpi",
[MTK_DSI] = "dsi",
+ [MTK_OVL_EXDMA] = "exdma",
};
struct mtk_ddp_comp_match {
diff --git a/drivers/gpu/drm/mediatek/mtk_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_ddp_comp.h
index 39720b27f4e9..86dc0ee3924c 100644
--- a/drivers/gpu/drm/mediatek/mtk_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_ddp_comp.h
@@ -43,6 +43,7 @@ enum mtk_ddp_comp_type {
MTK_DPI,
MTK_DP_INTF,
MTK_DSI,
+ MTK_OVL_EXDMA,
MTK_DDP_COMP_TYPE_MAX,
};
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
index 04217a36939c..4e3d2510bef5 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
@@ -39,6 +39,15 @@ void mtk_color_config(struct device *dev, unsigned int w,
unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
void mtk_color_start(struct device *dev);
+int mtk_disp_exdma_clk_enable(struct device *dev);
+void mtk_disp_exdma_clk_disable(struct device *dev);
+void mtk_disp_exdma_start(struct device *dev, struct cmdq_pkt *cmdq_pkt);
+void mtk_disp_exdma_stop(struct device *dev, struct cmdq_pkt *cmdq_pkt);
+void mtk_disp_exdma_layer_config(struct device *dev, struct mtk_plane_state *state,
+ struct cmdq_pkt *cmdq_pkt);
+const u32 *mtk_disp_exdma_get_formats(struct device *dev);
+size_t mtk_disp_exdma_get_num_formats(struct device *dev);
+
void mtk_dither_set_common(void __iomem *regs, struct cmdq_client_reg *cmdq_reg,
unsigned int bpc, unsigned int cfg,
unsigned int dither_en, struct cmdq_pkt *cmdq_pkt);
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_exdma.c b/drivers/gpu/drm/mediatek/mtk_disp_exdma.c
new file mode 100644
index 000000000000..d4f7021f98d7
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_disp_exdma.c
@@ -0,0 +1,372 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2025 MediaTek Inc.
+ */
+
+#include <drm/drm_fourcc.h>
+#include <drm/drm_blend.h>
+#include <drm/drm_framebuffer.h>
+#include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/soc/mediatek/mtk-cmdq.h>
+
+#include "mtk_disp_drv.h"
+#include "mtk_drm_drv.h"
+#include "mtk_disp_ovl.h"
+
+#define DISP_REG_OVL_EXDMA_EN_CON 0xc
+#define OVL_EXDMA_OP_8BIT_MODE BIT(4)
+#define OVL_EXDMA_HG_FOVL_EXDMA_CK_ON BIT(8)
+#define OVL_EXDMA_HF_FOVL_EXDMA_CK_ON BIT(10)
+#define DISP_REG_OVL_EXDMA_DATAPATH_CON 0x014
+#define OVL_EXDMA_DATAPATH_CON_LAYER_SMI_ID_EN BIT(0)
+#define OVL_EXDMA_DATAPATH_CON_GCLAST_EN BIT(24)
+#define OVL_EXDMA_DATAPATH_CON_HDR_GCLAST_EN BIT(25)
+#define DISP_REG_OVL_EXDMA_EN 0x020
+#define OVL_EXDMA_EN BIT(0)
+#define DISP_REG_OVL_EXDMA_RST 0x024
+#define OVL_EXDMA_RST BIT(0)
+#define DISP_REG_OVL_EXDMA_ROI_SIZE 0x030
+#define DISP_REG_OVL_EXDMA_L0_EN 0x040
+#define OVL_EXDMA_L0_EN BIT(0)
+#define DISP_REG_OVL_EXDMA_OFFSET 0x044
+#define DISP_REG_OVL_EXDMA_SRC_SIZE 0x048
+#define DISP_REG_OVL_EXDMA_L0_CLRFMT 0x050
+#define OVL_EXDMA_CON_FLD_CLRFMT GENMASK(3, 0)
+#define OVL_EXDMA_CON_CLRFMT_MAN BIT(4)
+#define OVL_EXDMA_CON_FLD_CLRFMT_NB GENMASK(9, 8)
+#define OVL_EXDMA_CON_CLRFMT_NB_10_BIT BIT(8)
+#define OVL_EXDMA_CON_BYTE_SWAP BIT(16)
+#define OVL_EXDMA_CON_RGB_SWAP BIT(17)
+#define DISP_REG_OVL_EXDMA_RDMA0_CTRL 0x100
+#define OVL_EXDMA_RDMA0_EN BIT(0)
+#define DISP_REG_OVL_EXDMA_RDMA_BURST_CON1 0x1f4
+#define OVL_EXDMA_RDMA_BURST_CON1_BURST16_EN BIT(28)
+#define OVL_EXDMA_RDMA_BURST_CON1_DDR_EN BIT(30)
+#define OVL_EXDMA_RDMA_BURST_CON1_DDR_ACK_EN BIT(31)
+#define DISP_REG_OVL_EXDMA_DUMMY_REG 0x200
+#define OVL_EXDMA_EXT_DDR_EN_OPT BIT(2)
+#define OVL_EXDMA_FORCE_EXT_DDR_EN BIT(3)
+#define DISP_REG_OVL_EXDMA_GDRDY_PRD 0x208
+#define DISP_REG_OVL_EXDMA_PITCH_MSB 0x2f0
+#define DISP_REG_OVL_EXDMA_PITCH 0x2f4
+#define OVL_EXDMA_L0_SRC_PITCH GENMASK(15, 0)
+#define OVL_EXDMA_L0_CONST_BLD BIT(28)
+#define OVL_EXDMA_L0_SRC_PITCH_MASK GENMASK(15, 0)
+#define DISP_REG_OVL_EXDMA_L0_GUSER_EXT 0x2fc
+#define OVL_EXDMA_RDMA0_L0_VCSEL BIT(5)
+#define OVL_EXDMA_RDMA0_HDR_L0_VCSEL BIT(21)
+#define DISP_REG_OVL_EXDMA_CON 0x300
+#define OVL_EXDMA_CON_FLD_INT_MTX_SEL GENMASK(19, 16)
+#define OVL_EXDMA_CON_INT_MTX_BT601_TO_RGB (6 << 16)
+#define OVL_EXDMA_CON_INT_MTX_BT709_TO_RGB (7 << 16)
+#define OVL_EXDMA_CON_INT_MTX_EN BIT(27)
+#define DISP_REG_OVL_EXDMA_ADDR 0xf40
+#define DISP_REG_OVL_EXDMA_MOUT 0xff0
+#define OVL_EXDMA_MOUT_OUT_DATA BIT(0)
+#define OVL_EXDMA_MOUT_BGCLR_OUT BIT(1)
+
+static const u32 formats[] = {
+ DRM_FORMAT_XRGB8888,
+ DRM_FORMAT_ARGB8888,
+ DRM_FORMAT_BGRX8888,
+ DRM_FORMAT_BGRA8888,
+ DRM_FORMAT_ABGR8888,
+ DRM_FORMAT_XBGR8888,
+ DRM_FORMAT_RGBX8888,
+ DRM_FORMAT_RGBA8888,
+ DRM_FORMAT_RGB888,
+ DRM_FORMAT_BGR888,
+ DRM_FORMAT_RGB565,
+ DRM_FORMAT_BGR565,
+ DRM_FORMAT_UYVY,
+ DRM_FORMAT_YUYV,
+ DRM_FORMAT_XRGB2101010,
+ DRM_FORMAT_ARGB2101010,
+ DRM_FORMAT_RGBX1010102,
+ DRM_FORMAT_RGBA1010102,
+ DRM_FORMAT_XBGR2101010,
+ DRM_FORMAT_ABGR2101010,
+ DRM_FORMAT_BGRX1010102,
+ DRM_FORMAT_BGRA1010102,
+};
+
+struct mtk_disp_exdma {
+ void __iomem *regs;
+ struct clk *clk;
+ struct cmdq_client_reg cmdq_reg;
+ struct device *larb;
+};
+
+static unsigned int mtk_disp_exdma_color_convert(unsigned int color_encoding)
+{
+ switch (color_encoding) {
+ default:
+ case DRM_COLOR_YCBCR_BT709:
+ return OVL_EXDMA_CON_INT_MTX_BT709_TO_RGB;
+ case DRM_COLOR_YCBCR_BT601:
+ return OVL_EXDMA_CON_INT_MTX_BT601_TO_RGB;
+ }
+}
+
+void mtk_disp_exdma_start(struct device *dev, struct cmdq_pkt *cmdq_pkt)
+{
+ struct mtk_disp_exdma *priv = dev_get_drvdata(dev);
+ unsigned int value = 0, mask = 0;
+
+ value = OVL_EXDMA_RDMA_BURST_CON1_BURST16_EN | OVL_EXDMA_RDMA_BURST_CON1_DDR_ACK_EN;
+ mask = OVL_EXDMA_RDMA_BURST_CON1_BURST16_EN | OVL_EXDMA_RDMA_BURST_CON1_DDR_EN |
+ OVL_EXDMA_RDMA_BURST_CON1_DDR_ACK_EN;
+ mtk_ddp_write_mask(cmdq_pkt, value, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_RDMA_BURST_CON1, mask);
+ /*
+ * The dummy register is used in the configuration of the EXDMA engine to
+ * write commands to DRAM, ensuring that data transfers occur normally.
+ */
+ value = OVL_EXDMA_EXT_DDR_EN_OPT | OVL_EXDMA_FORCE_EXT_DDR_EN;
+ mask = OVL_EXDMA_EXT_DDR_EN_OPT | OVL_EXDMA_FORCE_EXT_DDR_EN;
+ mtk_ddp_write_mask(cmdq_pkt, value, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_DUMMY_REG, mask);
+
+ value = OVL_EXDMA_DATAPATH_CON_LAYER_SMI_ID_EN |
+ OVL_EXDMA_DATAPATH_CON_HDR_GCLAST_EN |
+ OVL_EXDMA_DATAPATH_CON_GCLAST_EN;
+ mask = OVL_EXDMA_DATAPATH_CON_LAYER_SMI_ID_EN |
+ OVL_EXDMA_DATAPATH_CON_HDR_GCLAST_EN |
+ OVL_EXDMA_DATAPATH_CON_GCLAST_EN;
+ mtk_ddp_write_mask(cmdq_pkt, value, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_DATAPATH_CON, mask);
+
+ mtk_ddp_write_mask(cmdq_pkt, OVL_EXDMA_MOUT_BGCLR_OUT, &priv->cmdq_reg,
+ priv->regs, DISP_REG_OVL_EXDMA_MOUT,
+ OVL_EXDMA_MOUT_BGCLR_OUT | OVL_EXDMA_MOUT_OUT_DATA);
+
+ mtk_ddp_write(cmdq_pkt, ~0, &priv->cmdq_reg, priv->regs, DISP_REG_OVL_EXDMA_GDRDY_PRD);
+
+ mtk_ddp_write_mask(cmdq_pkt, OVL_EXDMA_RDMA0_EN, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_RDMA0_CTRL, OVL_EXDMA_RDMA0_EN);
+ mtk_ddp_write_mask(cmdq_pkt, OVL_EXDMA_L0_EN, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_L0_EN, OVL_EXDMA_L0_EN);
+
+ mtk_ddp_write_mask(cmdq_pkt, OVL_EXDMA_EN, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_EN, OVL_EXDMA_EN);
+}
+
+void mtk_disp_exdma_stop(struct device *dev, struct cmdq_pkt *cmdq_pkt)
+{
+ struct mtk_disp_exdma *priv = dev_get_drvdata(dev);
+
+ mtk_ddp_write_mask(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_EN, OVL_EXDMA_EN);
+ mtk_ddp_write_mask(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_RDMA0_CTRL, OVL_EXDMA_RDMA0_EN);
+ mtk_ddp_write_mask(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_DATAPATH_CON, OVL_EXDMA_DATAPATH_CON_LAYER_SMI_ID_EN);
+ mtk_ddp_write_mask(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_L0_EN, OVL_EXDMA_L0_EN);
+ mtk_ddp_write_mask(cmdq_pkt, OVL_EXDMA_RST, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_RST, OVL_EXDMA_RST);
+ mtk_ddp_write_mask(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_RST, OVL_EXDMA_RST);
+}
+
+void mtk_disp_exdma_layer_config(struct device *dev, struct mtk_plane_state *state,
+ struct cmdq_pkt *cmdq_pkt)
+{
+ struct mtk_disp_exdma *priv = dev_get_drvdata(dev);
+ struct mtk_plane_pending_state *pending = &state->pending;
+ const struct drm_format_info *fmt_info = drm_format_info(pending->format);
+ unsigned int align_width = 0;
+ bool csc_enable = (fmt_info) ? fmt_info->is_yuv : false;
+ unsigned int blend_mode = mtk_ovl_get_blend_mode(state,
+ BIT(DRM_MODE_BLEND_PREMULTI) |
+ BIT(DRM_MODE_BLEND_COVERAGE) |
+ BIT(DRM_MODE_BLEND_PIXEL_NONE));
+ unsigned int val = 0;
+ unsigned int clrfmt_mask = OVL_EXDMA_CON_RGB_SWAP |
+ OVL_EXDMA_CON_BYTE_SWAP |
+ OVL_EXDMA_CON_CLRFMT_MAN |
+ OVL_EXDMA_CON_FLD_CLRFMT |
+ OVL_EXDMA_CON_FLD_CLRFMT_NB;
+
+ if (!pending->enable) {
+ mtk_ddp_write_mask(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_RDMA0_CTRL, OVL_EXDMA_RDMA0_EN);
+ mtk_ddp_write_mask(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_L0_EN, OVL_EXDMA_L0_EN);
+ return;
+ }
+
+ /* OVLSYS is in 1T2P domain, width needs to be 2 pixels align */
+ align_width = ALIGN_DOWN(pending->width, 2);
+
+ mtk_ddp_write(cmdq_pkt, pending->height << 16 | align_width, &priv->cmdq_reg,
+ priv->regs, DISP_REG_OVL_EXDMA_ROI_SIZE);
+
+ mtk_ddp_write(cmdq_pkt, pending->height << 16 | align_width, &priv->cmdq_reg,
+ priv->regs, DISP_REG_OVL_EXDMA_SRC_SIZE);
+ mtk_ddp_write(cmdq_pkt, pending->height << 16 | align_width, &priv->cmdq_reg,
+ priv->regs, DISP_REG_OVL_EXDMA_SRC_SIZE);
+
+ mtk_ddp_write_mask(cmdq_pkt, pending->pitch, &priv->cmdq_reg,
+ priv->regs, DISP_REG_OVL_EXDMA_PITCH, OVL_EXDMA_L0_SRC_PITCH_MASK);
+ mtk_ddp_write_mask(cmdq_pkt, pending->pitch >> 16, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_PITCH_MSB, 0xf);
+
+ val = mtk_disp_exdma_color_convert(pending->color_encoding);
+ if (csc_enable)
+ val |= OVL_EXDMA_CON_INT_MTX_EN;
+ mtk_ddp_write_mask(cmdq_pkt, val, &priv->cmdq_reg, priv->regs, DISP_REG_OVL_EXDMA_CON,
+ OVL_EXDMA_CON_FLD_INT_MTX_SEL | OVL_EXDMA_CON_INT_MTX_EN);
+
+ val = mtk_ovl_fmt_convert(pending->format, blend_mode, true, false, 0,
+ OVL_EXDMA_CON_CLRFMT_MAN, OVL_EXDMA_CON_BYTE_SWAP,
+ OVL_EXDMA_CON_RGB_SWAP);
+ if (mtk_ovl_is_10bit_rgb(pending->format))
+ val |= OVL_EXDMA_CON_CLRFMT_NB_10_BIT;
+ mtk_ddp_write_mask(cmdq_pkt, val, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_L0_CLRFMT, clrfmt_mask);
+
+ val = OVL_EXDMA_HG_FOVL_EXDMA_CK_ON | OVL_EXDMA_HF_FOVL_EXDMA_CK_ON |
+ OVL_EXDMA_OP_8BIT_MODE;
+ mtk_ddp_write_mask(cmdq_pkt, val, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_EN_CON, val);
+
+ val = OVL_EXDMA_RDMA0_L0_VCSEL | OVL_EXDMA_RDMA0_HDR_L0_VCSEL;
+ mtk_ddp_write_mask(cmdq_pkt, val, &priv->cmdq_reg, priv->regs,
+ DISP_REG_OVL_EXDMA_L0_GUSER_EXT, val);
+
+ val = pending->pitch;
+ if (mtk_ovl_is_ignore_pixel_alpha(state, blend_mode))
+ val |= OVL_EXDMA_L0_CONST_BLD;
+ mtk_ddp_write_mask(cmdq_pkt, val, &priv->cmdq_reg, priv->regs, DISP_REG_OVL_EXDMA_PITCH,
+ OVL_EXDMA_L0_CONST_BLD | OVL_EXDMA_L0_SRC_PITCH);
+}
+
+const u32 *mtk_disp_exdma_get_formats(struct device *dev)
+{
+ return formats;
+}
+
+size_t mtk_disp_exdma_get_num_formats(struct device *dev)
+{
+ return ARRAY_SIZE(formats);
+}
+
+int mtk_disp_exdma_clk_enable(struct device *dev)
+{
+ struct mtk_disp_exdma *exdma = dev_get_drvdata(dev);
+
+ return clk_prepare_enable(exdma->clk);
+}
+
+void mtk_disp_exdma_clk_disable(struct device *dev)
+{
+ struct mtk_disp_exdma *exdma = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(exdma->clk);
+}
+
+static int mtk_disp_exdma_bind(struct device *dev, struct device *master,
+ void *data)
+{
+ return 0;
+}
+
+static void mtk_disp_exdma_unbind(struct device *dev, struct device *master,
+ void *data)
+{
+}
+
+static const struct component_ops mtk_disp_exdma_component_ops = {
+ .bind = mtk_disp_exdma_bind,
+ .unbind = mtk_disp_exdma_unbind,
+};
+
+static int mtk_disp_exdma_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct platform_device *larb_pdev = NULL;
+ struct device_node *larb_node = NULL;
+ struct resource *res;
+ struct mtk_disp_exdma *priv;
+ int ret = 0;
+
+ 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 exdma\n");
+ return PTR_ERR(priv->regs);
+ }
+
+ priv->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(priv->clk)) {
+ dev_err(dev, "failed to get exdma clk\n");
+ return PTR_ERR(priv->clk);
+ }
+
+ larb_node = of_parse_phandle(dev->of_node, "mediatek,larb", 0);
+ if (larb_node) {
+ larb_pdev = of_find_device_by_node(larb_node);
+ if (larb_pdev)
+ priv->larb = &larb_pdev->dev;
+ of_node_put(larb_node);
+ }
+
+ if (!priv->larb) {
+ dev_dbg(dev, "not find larb dev");
+ return -EPROBE_DEFER;
+ }
+ device_link_add(dev, priv->larb, DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS);
+
+#if IS_REACHABLE(CONFIG_MTK_CMDQ)
+ ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
+ if (ret)
+ dev_dbg(dev, "No mediatek,gce-client-reg\n");
+#endif
+ platform_set_drvdata(pdev, priv);
+
+ pm_runtime_enable(dev);
+
+ ret = component_add(dev, &mtk_disp_exdma_component_ops);
+ if (ret != 0) {
+ pm_runtime_disable(dev);
+ dev_err(dev, "Failed to add component: %d\n", ret);
+ }
+ return ret;
+}
+
+static void mtk_disp_exdma_remove(struct platform_device *pdev)
+{
+ component_del(&pdev->dev, &mtk_disp_exdma_component_ops);
+ pm_runtime_disable(&pdev->dev);
+}
+
+static const struct of_device_id mtk_disp_exdma_driver_dt_match[] = {
+ { .compatible = "mediatek,mt8196-exdma", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mtk_disp_exdma_driver_dt_match);
+
+struct platform_driver mtk_disp_exdma_driver = {
+ .probe = mtk_disp_exdma_probe,
+ .remove = mtk_disp_exdma_remove,
+ .driver = {
+ .name = "mediatek-disp-exdma",
+ .owner = THIS_MODULE,
+ .of_match_table = mtk_disp_exdma_driver_dt_match,
+ },
+};
+
+MODULE_AUTHOR("Nancy Lin <nancy.lin@...iatek.com>");
+MODULE_DESCRIPTION("MediaTek Exdma Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 74158b9d6503..bb7306a942ff 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -1276,6 +1276,7 @@ static struct platform_driver * const mtk_drm_drivers[] = {
&mtk_disp_aal_driver,
&mtk_disp_ccorr_driver,
&mtk_disp_color_driver,
+ &mtk_disp_exdma_driver,
&mtk_disp_gamma_driver,
&mtk_disp_merge_driver,
&mtk_disp_ovl_adaptor_driver,
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
index 675cdc90a440..898a75898775 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
@@ -72,6 +72,7 @@ struct mtk_drm_private {
extern struct platform_driver mtk_disp_aal_driver;
extern struct platform_driver mtk_disp_ccorr_driver;
extern struct platform_driver mtk_disp_color_driver;
+extern struct platform_driver mtk_disp_exdma_driver;
extern struct platform_driver mtk_disp_gamma_driver;
extern struct platform_driver mtk_disp_merge_driver;
extern struct platform_driver mtk_disp_ovl_adaptor_driver;
--
2.45.2
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