[PATCH v2 28/30] video: omap: split the legacy code from the DM code
Dario Binacchi
dariobin at libero.it
Sun Sep 6 14:16:49 CEST 2020
The schedule for deprecating the features of the pre-driver-model puts
2019.17 as the deadline for the video subsystem. Furthermore, the latest
patches applied to the am335x-fb.c module have decreased the amount of
code shared with the pre-driver-model implementation. Splitting the two
implementations into two modules improves the readability of the code
and will make it easier to drop the pre-driver-model code.
I have not created a header file with the data structures and the
constants for accessing the LCD controller registers, but I preferred to
keep them inside the two c modules. This is a code replication until the
pre-driver-model version is dropped.
Signed-off-by: Dario Binacchi <dariobin at libero.it>
---
(no changes since v1)
drivers/video/Makefile | 5 +-
drivers/video/am335x-fb.c | 350 ----------------------------
drivers/video/am335x-fb.h | 35 ---
drivers/video/tilcdc-panel.c | 2 +-
drivers/video/tilcdc-panel.h | 2 +-
drivers/video/tilcdc.c | 438 +++++++++++++++++++++++++++++++++++
drivers/video/tilcdc.h | 38 +++
7 files changed, 481 insertions(+), 389 deletions(-)
create mode 100644 drivers/video/tilcdc.c
create mode 100644 drivers/video/tilcdc.h
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index 132a63ecea..29f3434f7c 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -16,7 +16,9 @@ obj-$(CONFIG_DM_VIDEO) += video-uclass.o vidconsole-uclass.o
obj-$(CONFIG_DM_VIDEO) += video_bmp.o
obj-$(CONFIG_PANEL) += panel-uclass.o
obj-$(CONFIG_SIMPLE_PANEL) += simple_panel.o
-obj-$(CONFIG_AM335X_LCD) += tilcdc-panel.o
+obj-$(CONFIG_AM335X_LCD) += tilcdc.o tilcdc-panel.o
+else
+obj-$(CONFIG_AM335X_LCD) += am335x-fb.o
endif
obj-${CONFIG_EXYNOS_FB} += exynos/
@@ -24,7 +26,6 @@ obj-${CONFIG_VIDEO_ROCKCHIP} += rockchip/
obj-${CONFIG_VIDEO_STM32} += stm32/
obj-${CONFIG_VIDEO_TEGRA124} += tegra124/
-obj-$(CONFIG_AM335X_LCD) += am335x-fb.o
obj-$(CONFIG_ATI_RADEON_FB) += ati_radeon_fb.o videomodes.o
obj-$(CONFIG_ATMEL_HLCD) += atmel_hlcdfb.o
obj-$(CONFIG_ATMEL_LCD) += atmel_lcdfb.o
diff --git a/drivers/video/am335x-fb.c b/drivers/video/am335x-fb.c
index 021da5de3c..eb9d692035 100644
--- a/drivers/video/am335x-fb.c
+++ b/drivers/video/am335x-fb.c
@@ -12,22 +12,15 @@
* - starts output DMA from gd->fb_base buffer
*/
#include <common.h>
-#include <clk.h>
-#include <dm.h>
#include <lcd.h>
#include <log.h>
-#include <panel.h>
-#include <video.h>
#include <asm/arch/clock.h>
#include <asm/arch/hardware.h>
#include <asm/arch/omap.h>
#include <asm/arch/sys_proto.h>
#include <asm/io.h>
-#include <asm/utils.h>
#include <linux/delay.h>
-#include <linux/err.h>
#include "am335x-fb.h"
-#include "tilcdc-panel.h"
#define LCDC_FMAX 200000000
@@ -115,8 +108,6 @@ struct am335x_lcdhw {
DECLARE_GLOBAL_DATA_PTR;
-#if !CONFIG_IS_ENABLED(DM_VIDEO)
-
#if !defined(LCD_CNTL_BASE)
#error "hw-base address of LCD-Controller (LCD_CNTL_BASE) not defined!"
#endif
@@ -323,344 +314,3 @@ int am335xfb_init(struct am335x_lcdpanel *panel)
return 0;
}
-
-#else /* CONFIG_DM_VIDEO */
-
-#define FBSIZE(t, p) (((t).hactive.typ * (t).vactive.typ * (p).bpp) >> 3)
-
-enum {
- LCD_MAX_WIDTH = 2048,
- LCD_MAX_HEIGHT = 2048,
- LCD_MAX_LOG2_BPP = VIDEO_BPP32,
-};
-
-struct am335x_fb_priv {
- struct am335x_lcdhw *regs;
- struct clk clkdm;
- struct clk gclk;
- struct clk dpll_m2_clk;
-};
-
-static ulong tilcdc_set_pixel_clk_rate(struct udevice *dev, ulong rate)
-{
- struct am335x_fb_priv *priv = dev_get_priv(dev);
- struct am335x_lcdhw *regs = priv->regs;
- ulong mult_rate, mult_round_rate, best_err, err;
- u32 v;
- int div, i;
-
- best_err = rate;
- div = 0;
- for (i = 2; i <= 255; i++) {
- mult_rate = rate * i;
- mult_round_rate = clk_round_rate(&priv->gclk, mult_rate);
- if (IS_ERR_VALUE(mult_round_rate))
- return mult_round_rate;
-
- err = mult_rate - mult_round_rate;
- if (err < best_err) {
- best_err = err;
- div = i;
- if (err == 0)
- break;
- }
- }
-
- if (div == 0) {
- dev_err(dev, "failed to find a divisor\n");
- return -EFAULT;
- }
-
- mult_rate = clk_set_rate(&priv->gclk, rate * div);
- v = readl(®s->ctrl) & ~LCDC_CTRL_CLK_DIVISOR_MASK;
- v |= LCDC_CTRL_CLK_DIVISOR(div);
- writel(v, ®s->ctrl);
- rate = mult_rate / div;
- dev_dbg(dev, "rate=%ld, div=%d, err=%ld\n", rate, div, err);
- return rate;
-}
-
-static int am335x_fb_remove(struct udevice *dev)
-{
- struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
- struct am335x_fb_priv *priv = dev_get_priv(dev);
-
- uc_plat->base -= 0x20;
- uc_plat->size += 0x20;
- clk_release_all(&priv->gclk, 1);
- clk_release_all(&priv->dpll_m2_clk, 1);
- clk_release_all(&priv->clkdm, 1);
- return 0;
-}
-
-static int am335x_fb_probe(struct udevice *dev)
-{
- struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
- struct video_priv *uc_priv = dev_get_uclass_priv(dev);
- struct am335x_fb_priv *priv = dev_get_priv(dev);
- struct am335x_lcdhw *regs = priv->regs;
- struct udevice *panel, *clk_dev;
- struct tilcdc_panel_info info;
- struct display_timing timing;
- ulong rate;
- u32 reg;
- int err;
-
- /* Before relocation we don't need to do anything */
- if (!(gd->flags & GD_FLG_RELOC))
- return 0;
-
- err = uclass_get_device(UCLASS_PANEL, 0, &panel);
- if (err) {
- dev_err(dev, "failed to get panel\n");
- return err;
- }
-
- err = panel_get_display_timing(panel, &timing);
- if (err) {
- dev_err(dev, "failed to get display timing\n");
- return err;
- }
-
- if (timing.pixelclock.typ > (LCDC_FMAX / 2)) {
- dev_err(dev, "invalid display clock-frequency: %d Hz\n",
- timing.pixelclock.typ);
- return -EINVAL;
- }
-
- if (timing.hactive.typ > LCD_MAX_WIDTH)
- timing.hactive.typ = LCD_MAX_WIDTH;
-
- if (timing.vactive.typ > LCD_MAX_HEIGHT)
- timing.vactive.typ = LCD_MAX_HEIGHT;
-
- err = tilcdc_panel_get_display_info(panel, &info);
- if (err) {
- dev_err(dev, "failed to get panel info\n");
- return err;
- }
-
- switch (info.bpp) {
- case 16:
- case 24:
- case 32:
- break;
- default:
- dev_err(dev, "invalid seting, bpp: %d\n", info.bpp);
- return -EINVAL;
- }
-
- switch (info.dma_burst_sz) {
- case 1:
- case 2:
- case 4:
- case 8:
- case 16:
- break;
- default:
- dev_err(dev, "invalid setting, dma-burst-sz: %d\n",
- info.dma_burst_sz);
- return -EINVAL;
- }
-
- err = clk_get_by_name(dev, "fck", &priv->clkdm);
- if (err) {
- dev_err(dev, "%s: failed to get clock domain\n", __func__);
- return err;
- }
-
- err = clk_enable(&priv->clkdm);
- if (err) {
- dev_err(dev, "%s: failed to enable clock domain\n", __func__);
- return err;
- }
-
- err = uclass_get_device_by_name(UCLASS_CLK, "lcd_gclk at 534", &clk_dev);
- if (err) {
- dev_err(dev, "failed to get lcd_gclk device\n");
- return err;
- }
-
- err = clk_request(clk_dev, &priv->gclk);
- if (err) {
- dev_err(dev, "failed to get %s clock\n", clk_dev->name);
- return err;
- }
-
- rate = tilcdc_set_pixel_clk_rate(dev, timing.pixelclock.typ);
- if (IS_ERR_VALUE(rate)) {
- dev_err(dev, "failed to set pixel clock rate\n");
- return rate;
- }
-
- err = uclass_get_device_by_name(UCLASS_CLK, "dpll_disp_m2_ck at 4a4", &clk_dev);
- if (err) {
- dev_err(dev, "failed to get dpll_disp_m2 clock device\n");
- return err;
- }
-
- err = clk_request(clk_dev, &priv->dpll_m2_clk);
- if (err) {
- dev_err(dev, "failed to get %s clock\n", clk_dev->name);
- return err;
- }
-
- err = clk_set_parent(&priv->gclk, &priv->dpll_m2_clk);
- if (err) {
- dev_err(dev, "failed to set %s clock as %s's parent\n",
- priv->dpll_m2_clk.dev->name, priv->gclk.dev->name);
- return err;
- }
-
- /* palette default entry */
- memset((void *)uc_plat->base, 0, 0x20);
- *(unsigned int *)uc_plat->base = 0x4000;
- /* point fb behind palette */
- uc_plat->base += 0x20;
- uc_plat->size -= 0x20;
-
- writel(LCDC_CLKC_ENABLE_CORECLKEN | LCDC_CLKC_ENABLE_LIDDCLKEN |
- LCDC_CLKC_ENABLE_DMACLKEN, ®s->clkc_enable);
- writel(0, ®s->raster_ctrl);
-
- reg = readl(®s->ctrl) & LCDC_CTRL_CLK_DIVISOR_MASK;
- reg |= LCDC_CTRL_RASTER_MODE;
- writel(reg, ®s->ctrl);
-
- writel(uc_plat->base, ®s->lcddma_fb0_base);
- writel(uc_plat->base + FBSIZE(timing, info),
- ®s->lcddma_fb0_ceiling);
- writel(uc_plat->base, ®s->lcddma_fb1_base);
- writel(uc_plat->base + FBSIZE(timing, info),
- ®s->lcddma_fb1_ceiling);
-
- reg = LCDC_DMA_CTRL_FIFO_TH(info.fifo_th);
- switch (info.dma_burst_sz) {
- case 1:
- reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_1);
- break;
- case 2:
- reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_2);
- break;
- case 4:
- reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_4);
- break;
- case 8:
- reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_8);
- break;
- case 16:
- reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_16);
- break;
- }
-
- writel(reg, ®s->lcddma_ctrl);
-
- writel(LCDC_RASTER_TIMING_0_HORLSB(timing.hactive.typ) |
- LCDC_RASTER_TIMING_0_HORMSB(timing.hactive.typ) |
- LCDC_RASTER_TIMING_0_HFPLSB(timing.hfront_porch.typ) |
- LCDC_RASTER_TIMING_0_HBPLSB(timing.hback_porch.typ) |
- LCDC_RASTER_TIMING_0_HSWLSB(timing.hsync_len.typ),
- ®s->raster_timing0);
-
- writel(LCDC_RASTER_TIMING_1_VBP(timing.vback_porch.typ) |
- LCDC_RASTER_TIMING_1_VFP(timing.vfront_porch.typ) |
- LCDC_RASTER_TIMING_1_VSW(timing.vsync_len.typ) |
- LCDC_RASTER_TIMING_1_VERLSB(timing.vactive.typ),
- ®s->raster_timing1);
-
- reg = LCDC_RASTER_TIMING_2_ACB(info.ac_bias) |
- LCDC_RASTER_TIMING_2_ACBI(info.ac_bias_intrpt) |
- LCDC_RASTER_TIMING_2_HSWMSB(timing.hsync_len.typ) |
- LCDC_RASTER_TIMING_2_VERMSB(timing.vactive.typ) |
- LCDC_RASTER_TIMING_2_HBPMSB(timing.hback_porch.typ) |
- LCDC_RASTER_TIMING_2_HFPMSB(timing.hfront_porch.typ);
-
- if (timing.flags & DISPLAY_FLAGS_VSYNC_LOW)
- reg |= LCDC_RASTER_TIMING_2_VSYNC_INVERT;
-
- if (timing.flags & DISPLAY_FLAGS_HSYNC_LOW)
- reg |= LCDC_RASTER_TIMING_2_HSYNC_INVERT;
-
- if (info.invert_pxl_clk)
- reg |= LCDC_RASTER_TIMING_2_PXCLK_INVERT;
-
- if (info.sync_edge)
- reg |= LCDC_RASTER_TIMING_2_HSVS_RISEFALL;
-
- if (info.sync_ctrl)
- reg |= LCDC_RASTER_TIMING_2_HSVS_CONTROL;
-
- writel(reg, ®s->raster_timing2);
-
- reg = LCDC_RASTER_CTRL_PALMODE_RAWDATA | LCDC_RASTER_CTRL_TFT_MODE |
- LCDC_RASTER_CTRL_ENABLE | LCDC_RASTER_CTRL_REQDLY(info.fdd);
-
- if (info.tft_alt_mode)
- reg |= LCDC_RASTER_CTRL_TFT_ALT_ENABLE;
-
- if (info.bpp == 24)
- reg |= LCDC_RASTER_CTRL_TFT_24BPP_MODE;
- else if (info.bpp == 32)
- reg |= LCDC_RASTER_CTRL_TFT_24BPP_MODE |
- LCDC_RASTER_CTRL_TFT_24BPP_UNPACK;
-
- if (info.raster_order)
- reg |= LCDC_RASTER_CTRL_DATA_ORDER;
-
- writel(reg, ®s->raster_ctrl);
-
- uc_priv->xsize = timing.hactive.typ;
- uc_priv->ysize = timing.vactive.typ;
- uc_priv->bpix = log_2_n_round_up(info.bpp);
-
- err = panel_enable_backlight(panel);
- if (err) {
- dev_err(dev, "failed to enable panel backlight\n");
- return err;
- }
-
- return 0;
-}
-
-static int am335x_fb_ofdata_to_platdata(struct udevice *dev)
-{
- struct am335x_fb_priv *priv = dev_get_priv(dev);
-
- priv->regs = (struct am335x_lcdhw *)dev_read_addr(dev);
- if ((fdt_addr_t)priv->regs == FDT_ADDR_T_NONE) {
- dev_err(dev, "failed to get base address\n");
- return -EINVAL;
- }
-
- dev_dbg(dev, "LCD: base address=0x%x\n", (unsigned int)priv->regs);
- return 0;
-}
-
-static int am335x_fb_bind(struct udevice *dev)
-{
- struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
-
- uc_plat->size = ((LCD_MAX_WIDTH * LCD_MAX_HEIGHT *
- (1 << LCD_MAX_LOG2_BPP)) >> 3) + 0x20;
-
- dev_dbg(dev, "frame buffer size 0x%x\n", uc_plat->size);
- return 0;
-}
-
-static const struct udevice_id am335x_fb_ids[] = {
- { .compatible = "ti,am33xx-tilcdc" },
- { }
-};
-
-U_BOOT_DRIVER(am335x_fb) = {
- .name = "am335x_fb",
- .id = UCLASS_VIDEO,
- .of_match = am335x_fb_ids,
- .bind = am335x_fb_bind,
- .ofdata_to_platdata = am335x_fb_ofdata_to_platdata,
- .probe = am335x_fb_probe,
- .remove = am335x_fb_remove,
- .priv_auto_alloc_size = sizeof(struct am335x_fb_priv),
-};
-
-#endif /* CONFIG_DM_VIDEO */
diff --git a/drivers/video/am335x-fb.h b/drivers/video/am335x-fb.h
index 4952dd96e9..ad9b015e09 100644
--- a/drivers/video/am335x-fb.h
+++ b/drivers/video/am335x-fb.h
@@ -7,8 +7,6 @@
#ifndef AM335X_FB_H
#define AM335X_FB_H
-#if !CONFIG_IS_ENABLED(DM_VIDEO)
-
#define HSVS_CONTROL BIT(25) /*
* 0 = lcd_lp and lcd_fp are driven on
* opposite edges of pixel clock than
@@ -70,37 +68,4 @@ struct am335x_lcdpanel {
int am335xfb_init(struct am335x_lcdpanel *panel);
-#else /* CONFIG_DM_VIDEO */
-
-/**
- * tilcdc_panel_info: Panel parameters
- *
- * @ac_bias: AC Bias Pin Frequency
- * @ac_bias_intrpt: AC Bias Pin Transitions per Interrupt
- * @dma_burst_sz: DMA burst size
- * @bpp: Bits per pixel
- * @fdd: FIFO DMA Request Delay
- * @tft_alt_mode: TFT Alternative Signal Mapping (Only for active)
- * @invert_pxl_clk: Invert pixel clock
- * @sync_edge: Horizontal and Vertical Sync Edge: 0=rising 1=falling
- * @sync_ctrl: Horizontal and Vertical Sync: Control: 0=ignore
- * @raster_order: Raster Data Order Select: 1=Most-to-least 0=Least-to-most
- * @fifo_th: DMA FIFO threshold
- */
-struct tilcdc_panel_info {
- u32 ac_bias;
- u32 ac_bias_intrpt;
- u32 dma_burst_sz;
- u32 bpp;
- u32 fdd;
- bool tft_alt_mode;
- bool invert_pxl_clk;
- u32 sync_edge;
- u32 sync_ctrl;
- u32 raster_order;
- u32 fifo_th;
-};
-
-#endif /* CONFIG_DM_VIDEO */
-
#endif /* AM335X_FB_H */
diff --git a/drivers/video/tilcdc-panel.c b/drivers/video/tilcdc-panel.c
index 911e9b4c73..930523bf5e 100644
--- a/drivers/video/tilcdc-panel.c
+++ b/drivers/video/tilcdc-panel.c
@@ -14,7 +14,7 @@
#include <panel.h>
#include <asm/gpio.h>
#include <linux/err.h>
-#include "am335x-fb.h"
+#include "tilcdc.h"
struct tilcdc_panel_priv {
struct tilcdc_panel_info info;
diff --git a/drivers/video/tilcdc-panel.h b/drivers/video/tilcdc-panel.h
index 6b40731304..6bcfbf8a8b 100644
--- a/drivers/video/tilcdc-panel.h
+++ b/drivers/video/tilcdc-panel.h
@@ -6,7 +6,7 @@
#ifndef _TILCDC_PANEL_H
#define _TILCDC_PANEL_H
-#include "am335x-fb.h"
+#include "tilcdc.h"
int tilcdc_panel_get_display_info(struct udevice *dev,
struct tilcdc_panel_info *info);
diff --git a/drivers/video/tilcdc.c b/drivers/video/tilcdc.c
new file mode 100644
index 0000000000..32de3c9edc
--- /dev/null
+++ b/drivers/video/tilcdc.c
@@ -0,0 +1,438 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020 Dario Binacchi <dariobin at libero.it>
+ */
+
+#include <common.h>
+#include <clk.h>
+#include <dm.h>
+#include <lcd.h>
+#include <log.h>
+#include <panel.h>
+#include <video.h>
+#include <asm/io.h>
+#include <asm/utils.h>
+#include "tilcdc.h"
+#include "tilcdc-panel.h"
+
+#define LCDC_FMAX 200000000
+
+/* LCD Control Register */
+#define LCDC_CTRL_CLK_DIVISOR_MASK GENMASK(15, 8)
+#define LCDC_CTRL_RASTER_MODE BIT(0)
+#define LCDC_CTRL_CLK_DIVISOR(x) (((x) & GENMASK(7, 0)) << 8)
+/* LCD Clock Enable Register */
+#define LCDC_CLKC_ENABLE_CORECLKEN BIT(0)
+#define LCDC_CLKC_ENABLE_LIDDCLKEN BIT(1)
+#define LCDC_CLKC_ENABLE_DMACLKEN BIT(2)
+/* LCD DMA Control Register */
+#define LCDC_DMA_CTRL_BURST_SIZE(x) (((x) & GENMASK(2, 0)) << 4)
+#define LCDC_DMA_CTRL_BURST_1 0x0
+#define LCDC_DMA_CTRL_BURST_2 0x1
+#define LCDC_DMA_CTRL_BURST_4 0x2
+#define LCDC_DMA_CTRL_BURST_8 0x3
+#define LCDC_DMA_CTRL_BURST_16 0x4
+#define LCDC_DMA_CTRL_FIFO_TH(x) (((x) & GENMASK(2, 0)) << 8)
+/* LCD Timing_0 Register */
+#define LCDC_RASTER_TIMING_0_HORMSB(x) ((((x) - 1) & BIT(10)) >> 7)
+#define LCDC_RASTER_TIMING_0_HORLSB(x) (((((x) >> 4) - 1) & GENMASK(5, 0)) << 4)
+#define LCDC_RASTER_TIMING_0_HSWLSB(x) ((((x) - 1) & GENMASK(5, 0)) << 10)
+#define LCDC_RASTER_TIMING_0_HFPLSB(x) ((((x) - 1) & GENMASK(7, 0)) << 16)
+#define LCDC_RASTER_TIMING_0_HBPLSB(x) ((((x) - 1) & GENMASK(7, 0)) << 24)
+/* LCD Timing_1 Register */
+#define LCDC_RASTER_TIMING_1_VERLSB(x) (((x) - 1) & GENMASK(9, 0))
+#define LCDC_RASTER_TIMING_1_VSW(x) ((((x) - 1) & GENMASK(5, 0)) << 10)
+#define LCDC_RASTER_TIMING_1_VFP(x) (((x) & GENMASK(7, 0)) << 16)
+#define LCDC_RASTER_TIMING_1_VBP(x) (((x) & GENMASK(7, 0)) << 24)
+/* LCD Timing_2 Register */
+#define LCDC_RASTER_TIMING_2_HFPMSB(x) ((((x) - 1) & GENMASK(9, 8)) >> 8)
+#define LCDC_RASTER_TIMING_2_HBPMSB(x) ((((x) - 1) & GENMASK(9, 8)) >> 4)
+#define LCDC_RASTER_TIMING_2_ACB(x) (((x) & GENMASK(7, 0)) << 8)
+#define LCDC_RASTER_TIMING_2_ACBI(x) (((x) & GENMASK(3, 0)) << 16)
+#define LCDC_RASTER_TIMING_2_VSYNC_INVERT BIT(20)
+#define LCDC_RASTER_TIMING_2_HSYNC_INVERT BIT(21)
+#define LCDC_RASTER_TIMING_2_PXCLK_INVERT BIT(22)
+#define LCDC_RASTER_TIMING_2_DE_INVERT BIT(23)
+#define LCDC_RASTER_TIMING_2_HSVS_RISEFALL BIT(24)
+#define LCDC_RASTER_TIMING_2_HSVS_CONTROL BIT(25)
+#define LCDC_RASTER_TIMING_2_VERMSB(x) ((((x) - 1) & BIT(10)) << 16)
+#define LCDC_RASTER_TIMING_2_HSWMSB(x) ((((x) - 1) & GENMASK(9, 6)) << 21)
+/* LCD Raster Ctrl Register */
+#define LCDC_RASTER_CTRL_ENABLE BIT(0)
+#define LCDC_RASTER_CTRL_TFT_MODE BIT(7)
+#define LCDC_RASTER_CTRL_DATA_ORDER BIT(8)
+#define LCDC_RASTER_CTRL_REQDLY(x) (((x) & GENMASK(7, 0)) << 12)
+#define LCDC_RASTER_CTRL_PALMODE_RAWDATA (0x02 << 20)
+#define LCDC_RASTER_CTRL_TFT_ALT_ENABLE BIT(23)
+#define LCDC_RASTER_CTRL_TFT_24BPP_MODE BIT(25)
+#define LCDC_RASTER_CTRL_TFT_24BPP_UNPACK BIT(26)
+
+enum {
+ LCDC_MAX_WIDTH = 2048,
+ LCDC_MAX_HEIGHT = 2048,
+ LCDC_MAX_LOG2_BPP = VIDEO_BPP32,
+};
+
+struct tilcdc_regs {
+ u32 pid;
+ u32 ctrl;
+ u32 gap0;
+ u32 lidd_ctrl;
+ u32 lidd_cs0_conf;
+ u32 lidd_cs0_addr;
+ u32 lidd_cs0_data;
+ u32 lidd_cs1_conf;
+ u32 lidd_cs1_addr;
+ u32 lidd_cs1_data;
+ u32 raster_ctrl;
+ u32 raster_timing0;
+ u32 raster_timing1;
+ u32 raster_timing2;
+ u32 raster_subpanel;
+ u32 raster_subpanel2;
+ u32 lcddma_ctrl;
+ u32 lcddma_fb0_base;
+ u32 lcddma_fb0_ceiling;
+ u32 lcddma_fb1_base;
+ u32 lcddma_fb1_ceiling;
+ u32 sysconfig;
+ u32 irqstatus_raw;
+ u32 irqstatus;
+ u32 irqenable_set;
+ u32 irqenable_clear;
+ u32 gap1;
+ u32 clkc_enable;
+ u32 clkc_reset;
+};
+
+struct tilcdc_priv {
+ struct tilcdc_regs *regs;
+ struct clk clkdm;
+ struct clk gclk;
+ struct clk dpll_m2_clk;
+};
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static ulong tilcdc_set_pixel_clk_rate(struct udevice *dev, ulong rate)
+{
+ struct tilcdc_priv *priv = dev_get_priv(dev);
+ struct tilcdc_regs *regs = priv->regs;
+ ulong mult_rate, mult_round_rate, best_err, err;
+ u32 v;
+ int div, i;
+
+ best_err = rate;
+ div = 0;
+ for (i = 2; i <= 255; i++) {
+ mult_rate = rate * i;
+ mult_round_rate = clk_round_rate(&priv->gclk, mult_rate);
+ if (IS_ERR_VALUE(mult_round_rate))
+ return mult_round_rate;
+
+ err = mult_rate - mult_round_rate;
+ if (err < best_err) {
+ best_err = err;
+ div = i;
+ if (err == 0)
+ break;
+ }
+ }
+
+ if (div == 0) {
+ dev_err(dev, "failed to find a divisor\n");
+ return -EFAULT;
+ }
+
+ mult_rate = clk_set_rate(&priv->gclk, rate * div);
+ v = readl(®s->ctrl) & ~LCDC_CTRL_CLK_DIVISOR_MASK;
+ v |= LCDC_CTRL_CLK_DIVISOR(div);
+ writel(v, ®s->ctrl);
+ rate = mult_rate / div;
+ dev_dbg(dev, "rate=%ld, div=%d, err=%ld\n", rate, div, err);
+ return rate;
+}
+
+static int tilcdc_remove(struct udevice *dev)
+{
+ struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
+ struct tilcdc_priv *priv = dev_get_priv(dev);
+
+ uc_plat->base -= 0x20;
+ uc_plat->size += 0x20;
+ clk_release_all(&priv->gclk, 1);
+ clk_release_all(&priv->dpll_m2_clk, 1);
+ clk_release_all(&priv->clkdm, 1);
+ return 0;
+}
+
+static int tilcdc_probe(struct udevice *dev)
+{
+ struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
+ struct video_priv *uc_priv = dev_get_uclass_priv(dev);
+ struct tilcdc_priv *priv = dev_get_priv(dev);
+ struct tilcdc_regs *regs = priv->regs;
+ struct udevice *panel, *clk_dev;
+ struct tilcdc_panel_info info;
+ struct display_timing timing;
+ ulong rate;
+ u32 reg;
+ int err;
+
+ /* Before relocation we don't need to do anything */
+ if (!(gd->flags & GD_FLG_RELOC))
+ return 0;
+
+ err = uclass_get_device(UCLASS_PANEL, 0, &panel);
+ if (err) {
+ dev_err(dev, "failed to get panel\n");
+ return err;
+ }
+
+ err = panel_get_display_timing(panel, &timing);
+ if (err) {
+ dev_err(dev, "failed to get display timing\n");
+ return err;
+ }
+
+ if (timing.pixelclock.typ > (LCDC_FMAX / 2)) {
+ dev_err(dev, "invalid display clock-frequency: %d Hz\n",
+ timing.pixelclock.typ);
+ return -EINVAL;
+ }
+
+ if (timing.hactive.typ > LCDC_MAX_WIDTH)
+ timing.hactive.typ = LCDC_MAX_WIDTH;
+
+ if (timing.vactive.typ > LCDC_MAX_HEIGHT)
+ timing.vactive.typ = LCDC_MAX_HEIGHT;
+
+ err = tilcdc_panel_get_display_info(panel, &info);
+ if (err) {
+ dev_err(dev, "failed to get panel info\n");
+ return err;
+ }
+
+ switch (info.bpp) {
+ case 16:
+ case 24:
+ case 32:
+ break;
+ default:
+ dev_err(dev, "invalid seting, bpp: %d\n", info.bpp);
+ return -EINVAL;
+ }
+
+ switch (info.dma_burst_sz) {
+ case 1:
+ case 2:
+ case 4:
+ case 8:
+ case 16:
+ break;
+ default:
+ dev_err(dev, "invalid setting, dma-burst-sz: %d\n",
+ info.dma_burst_sz);
+ return -EINVAL;
+ }
+
+ err = clk_get_by_name(dev, "fck", &priv->clkdm);
+ if (err) {
+ dev_err(dev, "%s: failed to get clock domain\n", __func__);
+ return err;
+ }
+
+ err = clk_enable(&priv->clkdm);
+ if (err) {
+ dev_err(dev, "%s: failed to enable clock domain\n", __func__);
+ return err;
+ }
+
+ err = uclass_get_device_by_name(UCLASS_CLK, "lcd_gclk at 534", &clk_dev);
+ if (err) {
+ dev_err(dev, "failed to get lcd_gclk device\n");
+ return err;
+ }
+
+ err = clk_request(clk_dev, &priv->gclk);
+ if (err) {
+ dev_err(dev, "failed to get %s clock\n", clk_dev->name);
+ return err;
+ }
+
+ rate = tilcdc_set_pixel_clk_rate(dev, timing.pixelclock.typ);
+ if (IS_ERR_VALUE(rate)) {
+ dev_err(dev, "failed to set pixel clock rate\n");
+ return rate;
+ }
+
+ err = uclass_get_device_by_name(UCLASS_CLK, "dpll_disp_m2_ck at 4a4",
+ &clk_dev);
+ if (err) {
+ dev_err(dev, "failed to get dpll_disp_m2 clock device\n");
+ return err;
+ }
+
+ err = clk_request(clk_dev, &priv->dpll_m2_clk);
+ if (err) {
+ dev_err(dev, "failed to get %s clock\n", clk_dev->name);
+ return err;
+ }
+
+ err = clk_set_parent(&priv->gclk, &priv->dpll_m2_clk);
+ if (err) {
+ dev_err(dev, "failed to set %s clock as %s's parent\n",
+ priv->dpll_m2_clk.dev->name, priv->gclk.dev->name);
+ return err;
+ }
+
+ /* palette default entry */
+ memset((void *)uc_plat->base, 0, 0x20);
+ *(unsigned int *)uc_plat->base = 0x4000;
+ /* point fb behind palette */
+ uc_plat->base += 0x20;
+ uc_plat->size -= 0x20;
+
+ writel(LCDC_CLKC_ENABLE_CORECLKEN | LCDC_CLKC_ENABLE_LIDDCLKEN |
+ LCDC_CLKC_ENABLE_DMACLKEN, ®s->clkc_enable);
+ writel(0, ®s->raster_ctrl);
+
+ reg = readl(®s->ctrl) & LCDC_CTRL_CLK_DIVISOR_MASK;
+ reg |= LCDC_CTRL_RASTER_MODE;
+ writel(reg, ®s->ctrl);
+
+ reg = (timing.hactive.typ * timing.vactive.typ * info.bpp) >> 3;
+ reg += uc_plat->base;
+ writel(uc_plat->base, ®s->lcddma_fb0_base);
+ writel(reg, ®s->lcddma_fb0_ceiling);
+ writel(uc_plat->base, ®s->lcddma_fb1_base);
+ writel(reg, ®s->lcddma_fb1_ceiling);
+
+ reg = LCDC_DMA_CTRL_FIFO_TH(info.fifo_th);
+ switch (info.dma_burst_sz) {
+ case 1:
+ reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_1);
+ break;
+ case 2:
+ reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_2);
+ break;
+ case 4:
+ reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_4);
+ break;
+ case 8:
+ reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_8);
+ break;
+ case 16:
+ reg |= LCDC_DMA_CTRL_BURST_SIZE(LCDC_DMA_CTRL_BURST_16);
+ break;
+ }
+
+ writel(reg, ®s->lcddma_ctrl);
+
+ writel(LCDC_RASTER_TIMING_0_HORLSB(timing.hactive.typ) |
+ LCDC_RASTER_TIMING_0_HORMSB(timing.hactive.typ) |
+ LCDC_RASTER_TIMING_0_HFPLSB(timing.hfront_porch.typ) |
+ LCDC_RASTER_TIMING_0_HBPLSB(timing.hback_porch.typ) |
+ LCDC_RASTER_TIMING_0_HSWLSB(timing.hsync_len.typ),
+ ®s->raster_timing0);
+
+ writel(LCDC_RASTER_TIMING_1_VBP(timing.vback_porch.typ) |
+ LCDC_RASTER_TIMING_1_VFP(timing.vfront_porch.typ) |
+ LCDC_RASTER_TIMING_1_VSW(timing.vsync_len.typ) |
+ LCDC_RASTER_TIMING_1_VERLSB(timing.vactive.typ),
+ ®s->raster_timing1);
+
+ reg = LCDC_RASTER_TIMING_2_ACB(info.ac_bias) |
+ LCDC_RASTER_TIMING_2_ACBI(info.ac_bias_intrpt) |
+ LCDC_RASTER_TIMING_2_HSWMSB(timing.hsync_len.typ) |
+ LCDC_RASTER_TIMING_2_VERMSB(timing.vactive.typ) |
+ LCDC_RASTER_TIMING_2_HBPMSB(timing.hback_porch.typ) |
+ LCDC_RASTER_TIMING_2_HFPMSB(timing.hfront_porch.typ);
+
+ if (timing.flags & DISPLAY_FLAGS_VSYNC_LOW)
+ reg |= LCDC_RASTER_TIMING_2_VSYNC_INVERT;
+
+ if (timing.flags & DISPLAY_FLAGS_HSYNC_LOW)
+ reg |= LCDC_RASTER_TIMING_2_HSYNC_INVERT;
+
+ if (info.invert_pxl_clk)
+ reg |= LCDC_RASTER_TIMING_2_PXCLK_INVERT;
+
+ if (info.sync_edge)
+ reg |= LCDC_RASTER_TIMING_2_HSVS_RISEFALL;
+
+ if (info.sync_ctrl)
+ reg |= LCDC_RASTER_TIMING_2_HSVS_CONTROL;
+
+ writel(reg, ®s->raster_timing2);
+
+ reg = LCDC_RASTER_CTRL_PALMODE_RAWDATA | LCDC_RASTER_CTRL_TFT_MODE |
+ LCDC_RASTER_CTRL_ENABLE | LCDC_RASTER_CTRL_REQDLY(info.fdd);
+
+ if (info.tft_alt_mode)
+ reg |= LCDC_RASTER_CTRL_TFT_ALT_ENABLE;
+
+ if (info.bpp == 24)
+ reg |= LCDC_RASTER_CTRL_TFT_24BPP_MODE;
+ else if (info.bpp == 32)
+ reg |= LCDC_RASTER_CTRL_TFT_24BPP_MODE |
+ LCDC_RASTER_CTRL_TFT_24BPP_UNPACK;
+
+ if (info.raster_order)
+ reg |= LCDC_RASTER_CTRL_DATA_ORDER;
+
+ writel(reg, ®s->raster_ctrl);
+
+ uc_priv->xsize = timing.hactive.typ;
+ uc_priv->ysize = timing.vactive.typ;
+ uc_priv->bpix = log_2_n_round_up(info.bpp);
+
+ err = panel_enable_backlight(panel);
+ if (err) {
+ dev_err(dev, "failed to enable panel backlight\n");
+ return err;
+ }
+
+ return 0;
+}
+
+static int tilcdc_ofdata_to_platdata(struct udevice *dev)
+{
+ struct tilcdc_priv *priv = dev_get_priv(dev);
+
+ priv->regs = (struct tilcdc_regs *)dev_read_addr(dev);
+ if ((fdt_addr_t)priv->regs == FDT_ADDR_T_NONE) {
+ dev_err(dev, "failed to get base address\n");
+ return -EINVAL;
+ }
+
+ dev_dbg(dev, "LCD: base address=0x%x\n", (unsigned int)priv->regs);
+ return 0;
+}
+
+static int tilcdc_bind(struct udevice *dev)
+{
+ struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
+
+ uc_plat->size = ((LCDC_MAX_WIDTH * LCDC_MAX_HEIGHT *
+ (1 << LCDC_MAX_LOG2_BPP)) >> 3) + 0x20;
+
+ dev_dbg(dev, "frame buffer size 0x%x\n", uc_plat->size);
+ return 0;
+}
+
+static const struct udevice_id tilcdc_ids[] = {
+ {.compatible = "ti,am33xx-tilcdc"},
+ {}
+};
+
+U_BOOT_DRIVER(tilcdc) = {
+ .name = "tilcdc",
+ .id = UCLASS_VIDEO,
+ .of_match = tilcdc_ids,
+ .bind = tilcdc_bind,
+ .ofdata_to_platdata = tilcdc_ofdata_to_platdata,
+ .probe = tilcdc_probe,
+ .remove = tilcdc_remove,
+ .priv_auto_alloc_size = sizeof(struct tilcdc_priv)
+};
diff --git a/drivers/video/tilcdc.h b/drivers/video/tilcdc.h
new file mode 100644
index 0000000000..2645921df6
--- /dev/null
+++ b/drivers/video/tilcdc.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2020 Dario Binacchi <dariobin at libero.it>
+ */
+
+#ifndef _TILCDC_H
+#define _TILCDC_H
+
+/**
+ * tilcdc_panel_info: Panel parameters
+ *
+ * @ac_bias: AC Bias Pin Frequency
+ * @ac_bias_intrpt: AC Bias Pin Transitions per Interrupt
+ * @dma_burst_sz: DMA burst size
+ * @bpp: Bits per pixel
+ * @fdd: FIFO DMA Request Delay
+ * @tft_alt_mode: TFT Alternative Signal Mapping (Only for active)
+ * @invert_pxl_clk: Invert pixel clock
+ * @sync_edge: Horizontal and Vertical Sync Edge: 0=rising 1=falling
+ * @sync_ctrl: Horizontal and Vertical Sync: Control: 0=ignore
+ * @raster_order: Raster Data Order Select: 1=Most-to-least 0=Least-to-most
+ * @fifo_th: DMA FIFO threshold
+ */
+struct tilcdc_panel_info {
+ u32 ac_bias;
+ u32 ac_bias_intrpt;
+ u32 dma_burst_sz;
+ u32 bpp;
+ u32 fdd;
+ bool tft_alt_mode;
+ bool invert_pxl_clk;
+ u32 sync_edge;
+ u32 sync_ctrl;
+ u32 raster_order;
+ u32 fifo_th;
+};
+
+#endif /* _TILCDC_H */
--
2.17.1
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