Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 409 insertions, 0 deletions

diff --git a/drivers/gpu/drm/imx/dcss/dcss-dtg.c b/drivers/gpu/drm/imx/dcss/dcss-dtg.c
new file mode 100644
index 000000000..30de00540
--- /dev/null
+++ b/drivers/gpu/drm/imx/dcss/dcss-dtg.c
@@ -0,0 +1,409 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2019 NXP.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include "dcss-dev.h"
+
+#define DCSS_DTG_TC_CONTROL_STATUS			0x00
+#define   CH3_EN					BIT(0)
+#define   CH2_EN					BIT(1)
+#define   CH1_EN					BIT(2)
+#define   OVL_DATA_MODE					BIT(3)
+#define   BLENDER_VIDEO_ALPHA_SEL			BIT(7)
+#define   DTG_START					BIT(8)
+#define   DBY_MODE_EN					BIT(9)
+#define   CH1_ALPHA_SEL					BIT(10)
+#define   CSS_PIX_COMP_SWAP_POS				12
+#define   CSS_PIX_COMP_SWAP_MASK			GENMASK(14, 12)
+#define   DEFAULT_FG_ALPHA_POS				24
+#define   DEFAULT_FG_ALPHA_MASK				GENMASK(31, 24)
+#define DCSS_DTG_TC_DTG					0x04
+#define DCSS_DTG_TC_DISP_TOP				0x08
+#define DCSS_DTG_TC_DISP_BOT				0x0C
+#define DCSS_DTG_TC_CH1_TOP				0x10
+#define DCSS_DTG_TC_CH1_BOT				0x14
+#define DCSS_DTG_TC_CH2_TOP				0x18
+#define DCSS_DTG_TC_CH2_BOT				0x1C
+#define DCSS_DTG_TC_CH3_TOP				0x20
+#define DCSS_DTG_TC_CH3_BOT				0x24
+#define   TC_X_POS					0
+#define   TC_X_MASK					GENMASK(12, 0)
+#define   TC_Y_POS					16
+#define   TC_Y_MASK					GENMASK(28, 16)
+#define DCSS_DTG_TC_CTXLD				0x28
+#define   TC_CTXLD_DB_Y_POS				0
+#define   TC_CTXLD_DB_Y_MASK				GENMASK(12, 0)
+#define   TC_CTXLD_SB_Y_POS				16
+#define   TC_CTXLD_SB_Y_MASK				GENMASK(28, 16)
+#define DCSS_DTG_TC_CH1_BKRND				0x2C
+#define DCSS_DTG_TC_CH2_BKRND				0x30
+#define   BKRND_R_Y_COMP_POS				20
+#define   BKRND_R_Y_COMP_MASK				GENMASK(29, 20)
+#define   BKRND_G_U_COMP_POS				10
+#define   BKRND_G_U_COMP_MASK				GENMASK(19, 10)
+#define   BKRND_B_V_COMP_POS				0
+#define   BKRND_B_V_COMP_MASK				GENMASK(9, 0)
+#define DCSS_DTG_BLENDER_DBY_RANGEINV			0x38
+#define DCSS_DTG_BLENDER_DBY_RANGEMIN			0x3C
+#define DCSS_DTG_BLENDER_DBY_BDP			0x40
+#define DCSS_DTG_BLENDER_BKRND_I			0x44
+#define DCSS_DTG_BLENDER_BKRND_P			0x48
+#define DCSS_DTG_BLENDER_BKRND_T			0x4C
+#define DCSS_DTG_LINE0_INT				0x50
+#define DCSS_DTG_LINE1_INT				0x54
+#define DCSS_DTG_BG_ALPHA_DEFAULT			0x58
+#define DCSS_DTG_INT_STATUS				0x5C
+#define DCSS_DTG_INT_CONTROL				0x60
+#define DCSS_DTG_TC_CH3_BKRND				0x64
+#define DCSS_DTG_INT_MASK				0x68
+#define   LINE0_IRQ					BIT(0)
+#define   LINE1_IRQ					BIT(1)
+#define   LINE2_IRQ					BIT(2)
+#define   LINE3_IRQ					BIT(3)
+#define DCSS_DTG_LINE2_INT				0x6C
+#define DCSS_DTG_LINE3_INT				0x70
+#define DCSS_DTG_DBY_OL					0x74
+#define DCSS_DTG_DBY_BL					0x78
+#define DCSS_DTG_DBY_EL					0x7C
+
+struct dcss_dtg {
+	struct device *dev;
+	struct dcss_ctxld *ctxld;
+	void __iomem *base_reg;
+	u32 base_ofs;
+
+	u32 ctx_id;
+
+	bool in_use;
+
+	u32 dis_ulc_x;
+	u32 dis_ulc_y;
+
+	u32 control_status;
+	u32 alpha;
+	u32 alpha_cfg;
+
+	int ctxld_kick_irq;
+	bool ctxld_kick_irq_en;
+};
+
+static void dcss_dtg_write(struct dcss_dtg *dtg, u32 val, u32 ofs)
+{
+	if (!dtg->in_use)
+		dcss_writel(val, dtg->base_reg + ofs);
+
+	dcss_ctxld_write(dtg->ctxld, dtg->ctx_id,
+			 val, dtg->base_ofs + ofs);
+}
+
+static irqreturn_t dcss_dtg_irq_handler(int irq, void *data)
+{
+	struct dcss_dtg *dtg = data;
+	u32 status;
+
+	status = dcss_readl(dtg->base_reg + DCSS_DTG_INT_STATUS);
+
+	if (!(status & LINE0_IRQ))
+		return IRQ_NONE;
+
+	dcss_ctxld_kick(dtg->ctxld);
+
+	dcss_writel(status & LINE0_IRQ, dtg->base_reg + DCSS_DTG_INT_CONTROL);
+
+	return IRQ_HANDLED;
+}
+
+static int dcss_dtg_irq_config(struct dcss_dtg *dtg,
+			       struct platform_device *pdev)
+{
+	int ret;
+
+	dtg->ctxld_kick_irq = platform_get_irq_byname(pdev, "ctxld_kick");
+	if (dtg->ctxld_kick_irq < 0)
+		return dtg->ctxld_kick_irq;
+
+	dcss_update(0, LINE0_IRQ | LINE1_IRQ,
+		    dtg->base_reg + DCSS_DTG_INT_MASK);
+
+	ret = request_irq(dtg->ctxld_kick_irq, dcss_dtg_irq_handler,
+			  0, "dcss_ctxld_kick", dtg);
+	if (ret) {
+		dev_err(dtg->dev, "dtg: irq request failed.\n");
+		return ret;
+	}
+
+	disable_irq(dtg->ctxld_kick_irq);
+
+	dtg->ctxld_kick_irq_en = false;
+
+	return 0;
+}
+
+int dcss_dtg_init(struct dcss_dev *dcss, unsigned long dtg_base)
+{
+	int ret = 0;
+	struct dcss_dtg *dtg;
+
+	dtg = kzalloc(sizeof(*dtg), GFP_KERNEL);
+	if (!dtg)
+		return -ENOMEM;
+
+	dcss->dtg = dtg;
+	dtg->dev = dcss->dev;
+	dtg->ctxld = dcss->ctxld;
+
+	dtg->base_reg = ioremap(dtg_base, SZ_4K);
+	if (!dtg->base_reg) {
+		dev_err(dcss->dev, "dtg: unable to remap dtg base\n");
+		ret = -ENOMEM;
+		goto err_ioremap;
+	}
+
+	dtg->base_ofs = dtg_base;
+	dtg->ctx_id = CTX_DB;
+
+	dtg->alpha = 255;
+
+	dtg->control_status |= OVL_DATA_MODE | BLENDER_VIDEO_ALPHA_SEL |
+		((dtg->alpha << DEFAULT_FG_ALPHA_POS) & DEFAULT_FG_ALPHA_MASK);
+
+	ret = dcss_dtg_irq_config(dtg, to_platform_device(dcss->dev));
+	if (ret)
+		goto err_irq;
+
+	return 0;
+
+err_irq:
+	iounmap(dtg->base_reg);
+
+err_ioremap:
+	kfree(dtg);
+
+	return ret;
+}
+
+void dcss_dtg_exit(struct dcss_dtg *dtg)
+{
+	free_irq(dtg->ctxld_kick_irq, dtg);
+
+	if (dtg->base_reg)
+		iounmap(dtg->base_reg);
+
+	kfree(dtg);
+}
+
+void dcss_dtg_sync_set(struct dcss_dtg *dtg, struct videomode *vm)
+{
+	struct dcss_dev *dcss = dcss_drv_dev_to_dcss(dtg->dev);
+	u16 dtg_lrc_x, dtg_lrc_y;
+	u16 dis_ulc_x, dis_ulc_y;
+	u16 dis_lrc_x, dis_lrc_y;
+	u32 sb_ctxld_trig, db_ctxld_trig;
+	u32 pixclock = vm->pixelclock;
+	u32 actual_clk;
+
+	dtg_lrc_x = vm->hfront_porch + vm->hback_porch + vm->hsync_len +
+		    vm->hactive - 1;
+	dtg_lrc_y = vm->vfront_porch + vm->vback_porch + vm->vsync_len +
+		    vm->vactive - 1;
+	dis_ulc_x = vm->hsync_len + vm->hback_porch - 1;
+	dis_ulc_y = vm->vsync_len + vm->vfront_porch + vm->vback_porch - 1;
+	dis_lrc_x = vm->hsync_len + vm->hback_porch + vm->hactive - 1;
+	dis_lrc_y = vm->vsync_len + vm->vfront_porch + vm->vback_porch +
+		    vm->vactive - 1;
+
+	clk_disable_unprepare(dcss->pix_clk);
+	clk_set_rate(dcss->pix_clk, vm->pixelclock);
+	clk_prepare_enable(dcss->pix_clk);
+
+	actual_clk = clk_get_rate(dcss->pix_clk);
+	if (pixclock != actual_clk) {
+		dev_info(dtg->dev,
+			 "Pixel clock set to %u kHz instead of %u kHz.\n",
+			 (actual_clk / 1000), (pixclock / 1000));
+	}
+
+	dcss_dtg_write(dtg, ((dtg_lrc_y << TC_Y_POS) | dtg_lrc_x),
+		       DCSS_DTG_TC_DTG);
+	dcss_dtg_write(dtg, ((dis_ulc_y << TC_Y_POS) | dis_ulc_x),
+		       DCSS_DTG_TC_DISP_TOP);
+	dcss_dtg_write(dtg, ((dis_lrc_y << TC_Y_POS) | dis_lrc_x),
+		       DCSS_DTG_TC_DISP_BOT);
+
+	dtg->dis_ulc_x = dis_ulc_x;
+	dtg->dis_ulc_y = dis_ulc_y;
+
+	sb_ctxld_trig = ((0 * dis_lrc_y / 100) << TC_CTXLD_SB_Y_POS) &
+							TC_CTXLD_SB_Y_MASK;
+	db_ctxld_trig = ((99 * dis_lrc_y / 100) << TC_CTXLD_DB_Y_POS) &
+							TC_CTXLD_DB_Y_MASK;
+
+	dcss_dtg_write(dtg, sb_ctxld_trig | db_ctxld_trig, DCSS_DTG_TC_CTXLD);
+
+	/* vblank trigger */
+	dcss_dtg_write(dtg, 0, DCSS_DTG_LINE1_INT);
+
+	/* CTXLD trigger */
+	dcss_dtg_write(dtg, ((90 * dis_lrc_y) / 100) << 16, DCSS_DTG_LINE0_INT);
+}
+
+void dcss_dtg_plane_pos_set(struct dcss_dtg *dtg, int ch_num,
+			    int px, int py, int pw, int ph)
+{
+	u16 p_ulc_x, p_ulc_y;
+	u16 p_lrc_x, p_lrc_y;
+
+	p_ulc_x = dtg->dis_ulc_x + px;
+	p_ulc_y = dtg->dis_ulc_y + py;
+	p_lrc_x = p_ulc_x + pw;
+	p_lrc_y = p_ulc_y + ph;
+
+	if (!px && !py && !pw && !ph) {
+		dcss_dtg_write(dtg, 0, DCSS_DTG_TC_CH1_TOP + 0x8 * ch_num);
+		dcss_dtg_write(dtg, 0, DCSS_DTG_TC_CH1_BOT + 0x8 * ch_num);
+	} else {
+		dcss_dtg_write(dtg, ((p_ulc_y << TC_Y_POS) | p_ulc_x),
+			       DCSS_DTG_TC_CH1_TOP + 0x8 * ch_num);
+		dcss_dtg_write(dtg, ((p_lrc_y << TC_Y_POS) | p_lrc_x),
+			       DCSS_DTG_TC_CH1_BOT + 0x8 * ch_num);
+	}
+}
+
+bool dcss_dtg_global_alpha_changed(struct dcss_dtg *dtg, int ch_num, int alpha)
+{
+	if (ch_num)
+		return false;
+
+	return alpha != dtg->alpha;
+}
+
+void dcss_dtg_plane_alpha_set(struct dcss_dtg *dtg, int ch_num,
+			      const struct drm_format_info *format, int alpha)
+{
+	/* we care about alpha only when channel 0 is concerned */
+	if (ch_num)
+		return;
+
+	/*
+	 * Use global alpha if pixel format does not have alpha channel or the
+	 * user explicitly chose to use global alpha (i.e. alpha is not OPAQUE).
+	 */
+	if (!format->has_alpha || alpha != 255)
+		dtg->alpha_cfg = (alpha << DEFAULT_FG_ALPHA_POS) & DEFAULT_FG_ALPHA_MASK;
+	else /* use per-pixel alpha otherwise */
+		dtg->alpha_cfg = CH1_ALPHA_SEL;
+
+	dtg->alpha = alpha;
+}
+
+void dcss_dtg_css_set(struct dcss_dtg *dtg)
+{
+	dtg->control_status |=
+			(0x5 << CSS_PIX_COMP_SWAP_POS) & CSS_PIX_COMP_SWAP_MASK;
+}
+
+void dcss_dtg_enable(struct dcss_dtg *dtg)
+{
+	dtg->control_status |= DTG_START;
+
+	dtg->control_status &= ~(CH1_ALPHA_SEL | DEFAULT_FG_ALPHA_MASK);
+	dtg->control_status |= dtg->alpha_cfg;
+
+	dcss_dtg_write(dtg, dtg->control_status, DCSS_DTG_TC_CONTROL_STATUS);
+
+	dtg->in_use = true;
+}
+
+void dcss_dtg_shutoff(struct dcss_dtg *dtg)
+{
+	dtg->control_status &= ~DTG_START;
+
+	dcss_writel(dtg->control_status,
+		    dtg->base_reg + DCSS_DTG_TC_CONTROL_STATUS);
+
+	dtg->in_use = false;
+}
+
+bool dcss_dtg_is_enabled(struct dcss_dtg *dtg)
+{
+	return dtg->in_use;
+}
+
+void dcss_dtg_ch_enable(struct dcss_dtg *dtg, int ch_num, bool en)
+{
+	u32 ch_en_map[] = {CH1_EN, CH2_EN, CH3_EN};
+	u32 control_status;
+
+	control_status = dtg->control_status & ~ch_en_map[ch_num];
+	control_status |= en ? ch_en_map[ch_num] : 0;
+
+	control_status &= ~(CH1_ALPHA_SEL | DEFAULT_FG_ALPHA_MASK);
+	control_status |= dtg->alpha_cfg;
+
+	if (dtg->control_status != control_status)
+		dcss_dtg_write(dtg, control_status, DCSS_DTG_TC_CONTROL_STATUS);
+
+	dtg->control_status = control_status;
+}
+
+void dcss_dtg_vblank_irq_enable(struct dcss_dtg *dtg, bool en)
+{
+	u32 status;
+	u32 mask = en ? LINE1_IRQ : 0;
+
+	if (en) {
+		status = dcss_readl(dtg->base_reg + DCSS_DTG_INT_STATUS);
+		dcss_writel(status & LINE1_IRQ,
+			    dtg->base_reg + DCSS_DTG_INT_CONTROL);
+	}
+
+	dcss_update(mask, LINE1_IRQ, dtg->base_reg + DCSS_DTG_INT_MASK);
+}
+
+void dcss_dtg_ctxld_kick_irq_enable(struct dcss_dtg *dtg, bool en)
+{
+	u32 status;
+	u32 mask = en ? LINE0_IRQ : 0;
+
+	if (en) {
+		status = dcss_readl(dtg->base_reg + DCSS_DTG_INT_STATUS);
+
+		if (!dtg->ctxld_kick_irq_en) {
+			dcss_writel(status & LINE0_IRQ,
+				    dtg->base_reg + DCSS_DTG_INT_CONTROL);
+			enable_irq(dtg->ctxld_kick_irq);
+			dtg->ctxld_kick_irq_en = true;
+			dcss_update(mask, LINE0_IRQ,
+				    dtg->base_reg + DCSS_DTG_INT_MASK);
+		}
+
+		return;
+	}
+
+	if (!dtg->ctxld_kick_irq_en)
+		return;
+
+	disable_irq_nosync(dtg->ctxld_kick_irq);
+	dtg->ctxld_kick_irq_en = false;
+
+	dcss_update(mask, LINE0_IRQ, dtg->base_reg + DCSS_DTG_INT_MASK);
+}
+
+void dcss_dtg_vblank_irq_clear(struct dcss_dtg *dtg)
+{
+	dcss_update(LINE1_IRQ, LINE1_IRQ, dtg->base_reg + DCSS_DTG_INT_CONTROL);
+}
+
+bool dcss_dtg_vblank_irq_valid(struct dcss_dtg *dtg)
+{
+	return !!(dcss_readl(dtg->base_reg + DCSS_DTG_INT_STATUS) & LINE1_IRQ);
+}
+