[PATCH v3 11/12] drm/mediatek: add DSC support for MT8195
jason-jh.lin
jason-jh.lin at mediatek.com
Thu Jul 15 10:37:49 PDT 2021
Add DSC module file:
DSC is designed for real-time systems with real-time compression,
transmission, decompression and display.
The DSC standard is a specification of the algorithms used for
compressing and decompressing image display streams, including
the specification of the syntax and semantics of the compressed
video bit stream.
Signed-off-by: jason-jh.lin <jason-jh.lin at 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 | 161 ++++++++++++++++++++
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 19 ++-
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
drivers/gpu/drm/mediatek/mtk_drm_drv.c | 8 +-
drivers/gpu/drm/mediatek/mtk_drm_drv.h | 1 +
7 files changed, 194 insertions(+), 5 deletions(-)
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..44948e221fd3 100644
--- a/drivers/gpu/drm/mediatek/Makefile
+++ b/drivers/gpu/drm/mediatek/Makefile
@@ -2,6 +2,7 @@
mediatek-drm-y := mtk_disp_ccorr.o \
mtk_disp_color.o \
+ mtk_disp_dsc.o \
mtk_disp_gamma.o \
mtk_disp_ovl.o \
mtk_disp_rdma.o \
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
index cafd9df2d63b..c7e9bd370acd 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
@@ -33,6 +33,14 @@ void mtk_dither_set_common(void __iomem *regs, struct cmdq_client_reg *cmdq_reg,
void mtk_dpi_start(struct device *dev);
void mtk_dpi_stop(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);
+
void mtk_dsi_ddp_start(struct device *dev);
void mtk_dsi_ddp_stop(struct device *dev);
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..6a196220c532
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_disp_dsc.c
@@ -0,0 +1,161 @@
+// 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_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_BYPASS BIT(4)
+#define DSC_UFOE_SEL BIT(16)
+
+/**
+ * struct mtk_disp_dsc - DISP_DSC driver structure
+ * @clk - clk of dsc hardware
+ * @regs - hardware register address of dsc
+ * @cmdq_reg - structure containing cmdq hardware resource
+ */
+struct mtk_disp_dsc {
+ struct clk *clk;
+ void __iomem *regs;
+ 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;
+
+ mtk_ddp_write_mask(NULL, DSC_EN, &dsc->cmdq_reg, baddr,
+ DISP_REG_DSC_CON, DSC_EN);
+}
+
+void mtk_dsc_stop(struct device *dev)
+{
+ struct mtk_disp_dsc *dsc = dev_get_drvdata(dev);
+ void __iomem *baddr = dsc->regs;
+
+ mtk_ddp_write_mask(NULL, 0x0, &dsc->cmdq_reg, baddr,
+ DISP_REG_DSC_CON, DSC_EN);
+}
+
+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;
+ int irq;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ 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);
+
+ ret = component_add(dev, &mtk_disp_dsc_component_ops);
+ if (ret != 0)
+ dev_err(dev, "Failed to add component: %d\n", ret);
+
+ return ret;
+}
+
+static int mtk_disp_dsc_remove(struct platform_device *pdev)
+{
+ component_del(&pdev->dev, &mtk_disp_dsc_component_ops);
+
+ 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..ba3d7a1ce7ab 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 {
@@ -374,6 +383,9 @@ static const struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
[DDP_COMPONENT_DITHER] = { MTK_DISP_DITHER, 0, &ddp_dither },
[DDP_COMPONENT_DPI0] = { MTK_DPI, 0, &ddp_dpi },
[DDP_COMPONENT_DPI1] = { MTK_DPI, 1, &ddp_dpi },
+ [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 },
[DDP_COMPONENT_DSI0] = { MTK_DSI, 0, &ddp_dsi },
[DDP_COMPONENT_DSI1] = { MTK_DSI, 1, &ddp_dsi },
[DDP_COMPONENT_DSI2] = { MTK_DSI, 2, &ddp_dsi },
@@ -508,13 +520,14 @@ int mtk_ddp_comp_init(struct device_node *node, struct mtk_ddp_comp *comp,
if (type == MTK_DISP_BLS ||
type == MTK_DISP_CCORR ||
type == MTK_DISP_COLOR ||
+ type == MTK_DISP_DSC ||
type == MTK_DISP_GAMMA ||
- type == MTK_DPI ||
- type == MTK_DSI ||
type == MTK_DISP_OVL ||
type == MTK_DISP_OVL_2L ||
type == MTK_DISP_PWM ||
- type == MTK_DISP_RDMA)
+ type == MTK_DISP_RDMA ||
+ type == MTK_DPI ||
+ type == MTK_DSI)
return 0;
priv = devm_kzalloc(comp->dev, sizeof(*priv), GFP_KERNEL);
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..990a54049a7d 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",
@@ -562,12 +564,13 @@ static int mtk_drm_probe(struct platform_device *pdev)
*/
if (comp_type == MTK_DISP_CCORR ||
comp_type == MTK_DISP_COLOR ||
+ comp_type == MTK_DISP_DSC ||
comp_type == MTK_DISP_GAMMA ||
comp_type == MTK_DISP_OVL ||
comp_type == MTK_DISP_OVL_2L ||
comp_type == MTK_DISP_RDMA ||
- comp_type == MTK_DSI ||
- comp_type == MTK_DPI) {
+ comp_type == MTK_DPI ||
+ comp_type == MTK_DSI) {
dev_info(dev, "Adding component match for %pOF\n",
node);
drm_of_component_match_add(dev, &match, compare_of,
@@ -662,6 +665,7 @@ static struct platform_driver mtk_drm_platform_driver = {
static struct platform_driver * const mtk_drm_drivers[] = {
&mtk_disp_ccorr_driver,
&mtk_disp_color_driver,
+ &mtk_disp_dsc_driver,
&mtk_disp_gamma_driver,
&mtk_disp_ovl_driver,
&mtk_disp_rdma_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;
extern struct platform_driver mtk_dpi_driver;
extern struct platform_driver mtk_dsi_driver;
--
2.18.0
More information about the linux-arm-kernel
mailing list