[RESEND v17 6/7] drm/mediatek: add MERGE support for mediatek-drm

jason-jh.lin
2022-04-07T03:14:35Z

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@mediatek.com>
Acked-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
---
drivers/gpu/drm/mediatek/Makefile | 1 +
drivers/gpu/drm/mediatek/mtk_disp_drv.h | 8 +
drivers/gpu/drm/mediatek/mtk_disp_merge.c | 246 ++++++++++++++++++++
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 16 ++
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, 276 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 29098d7c8307..a38e88e82d12 100644
--- a/drivers/gpu/drm/mediatek/Makefile
+++ b/drivers/gpu/drm/mediatek/Makefile
@@ -4,6 +4,7 @@ mediatek-drm-y := mtk_disp_aal.o \
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 86c3068894b1..a33b13fe2b6e 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
@@ -55,6 +55,14 @@ 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..45face638153
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_disp_merge.c
@@ -0,0 +1,246 @@
+// 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
+#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 BIT(0)
+#define PREULTRA_EN BIT(4)
+#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)
+/*
+ * For the ultra and preultra settings, 6us ~ 9us is experience value
+ * and the maximum frequency of mmsys clock is 594MHz.
+ */
+#define DISP_REG_MERGE_CFG_40 0x0b0
+/* 6 us, 594M pixel/sec */
+#define ULTRA_TH_LOW (6 * 594)
+/* 8 us, 594M pixel/sec */
+#define ULTRA_TH_HIGH (8 * 594)
+#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, 594M pixel/sec */
+#define PREULTRA_TH_LOW (8 * 594)
+/* 9 us, 594M pixel/sec */
+#define PREULTRA_TH_HIGH (9 * 594)
+#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 *cmdq_pkt)
+{
+ mtk_ddp_write(cmdq_pkt, ULTRA_EN | PREULTRA_EN,
+ &priv->cmdq_reg, priv->regs, DISP_REG_MERGE_CFG_36);
+
+ mtk_ddp_write_mask(cmdq_pkt, BUFFER_MODE,
+ &priv->cmdq_reg, priv->regs, DISP_REG_MERGE_CFG_37,
+ FLD_BUFFER_MODE);
+
+ mtk_ddp_write_mask(cmdq_pkt, 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(cmdq_pkt, 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 *cmdq_pkt)
+{
+ 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, cmdq_pkt);
+ mode = CFG_10_10_2PI_2PO_BUF_MODE;
+ }
+
+ mtk_ddp_write(cmdq_pkt, h << 16 | w, &priv->cmdq_reg, priv->regs,
+ DISP_REG_MERGE_CFG_0);
+ mtk_ddp_write(cmdq_pkt, h << 16 | w, &priv->cmdq_reg, priv->regs,
+ DISP_REG_MERGE_CFG_4);
+ mtk_ddp_write(cmdq_pkt, h << 16 | w, &priv->cmdq_reg, priv->regs,
+ DISP_REG_MERGE_CFG_24);
+ mtk_ddp_write(cmdq_pkt, h << 16 | w, &priv->cmdq_reg, priv->regs,
+ DISP_REG_MERGE_CFG_25);
+ mtk_ddp_write_mask(cmdq_pkt, SWAP_MODE, &priv->cmdq_reg, priv->regs,
+ DISP_REG_MERGE_CFG_10, FLD_SWAP_MODE);
+ mtk_ddp_write_mask(cmdq_pkt, 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) {
+ dev_err(dev, "merge clk prepare enable failed\n");
+ return ret;
+ }
+
+ ret = clk_prepare_enable(priv->async_clk);
+ if (ret) {
+ /* should clean up the state of priv->clk */
+ clk_disable_unprepare(priv->clk);
+
+ dev_err(dev, "async clk prepare enable failed\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+void mtk_merge_clk_disable(struct device *dev)
+{
+ struct mtk_disp_merge *priv = dev_get_drvdata(dev);
+
+ 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 = devm_clk_get_optional(dev, "merge_async");
+ if (IS_ERR(priv->async_clk)) {
+ dev_err(dev, "failed to get merge async clock\n");
+ return PTR_ERR(priv->async_clk);
+ }
+
+#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.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index b3d26a05741f..95722de4986b 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -328,6 +328,14 @@ static const struct mtk_ddp_comp_funcs ddp_gamma = {
.stop = mtk_gamma_stop,
};

+static const struct mtk_ddp_comp_funcs ddp_merge = {
+ .clk_enable = mtk_merge_clk_enable,
+ .clk_disable = mtk_merge_clk_disable,
+ .start = mtk_merge_start,
+ .stop = mtk_merge_stop,
+ .config = mtk_merge_config,
+};
+
static const struct mtk_ddp_comp_funcs ddp_od = {
.clk_enable = mtk_ddp_clk_enable,
.clk_disable = mtk_ddp_clk_disable,
@@ -385,6 +393,7 @@ static const char * const mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX] = {
[MTK_DISP_DITHER] = "dither",
[MTK_DISP_DSC] = "dsc",
[MTK_DISP_GAMMA] = "gamma",
+ [MTK_DISP_MERGE] = "merge",
[MTK_DISP_MUTEX] = "mutex",
[MTK_DISP_OD] = "od",
[MTK_DISP_OVL] = "ovl",
@@ -421,6 +430,12 @@ static const struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
[DDP_COMPONENT_DSI2] = { MTK_DSI, 2, &ddp_dsi },
[DDP_COMPONENT_DSI3] = { MTK_DSI, 3, &ddp_dsi },
[DDP_COMPONENT_GAMMA] = { MTK_DISP_GAMMA, 0, &ddp_gamma },
+ [DDP_COMPONENT_MERGE0] = { MTK_DISP_MERGE, 0, &ddp_merge },
+ [DDP_COMPONENT_MERGE1] = { MTK_DISP_MERGE, 1, &ddp_merge },
+ [DDP_COMPONENT_MERGE2] = { MTK_DISP_MERGE, 2, &ddp_merge },
+ [DDP_COMPONENT_MERGE3] = { MTK_DISP_MERGE, 3, &ddp_merge },
+ [DDP_COMPONENT_MERGE4] = { MTK_DISP_MERGE, 4, &ddp_merge },
+ [DDP_COMPONENT_MERGE5] = { MTK_DISP_MERGE, 5, &ddp_merge },
[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, &ddp_ovl },
@@ -523,6 +538,7 @@ 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_MERGE ||
type == MTK_DISP_OVL ||
type == MTK_DISP_OVL_2L ||
type == MTK_DISP_PWM ||
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index 763725fe72b3..09ac9496547d 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 6a0a167320f0..230b8aee12b2 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -597,7 +597,7 @@ static int mtk_drm_probe(struct platform_device *pdev)
private->comp_node[comp_id] = of_node_get(node);

/*
- * Currently only the AAL, CCORR, COLOR, GAMMA, OVL, RDMA, DSI, and DPI
+ * Currently only the AAL, 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.
*/
@@ -605,6 +605,7 @@ static int mtk_drm_probe(struct platform_device *pdev)
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 ||
@@ -703,6 +704,7 @@ 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 3e7d1e6fbe01..a58cebd01d35 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
@@ -50,6 +50,7 @@ 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_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