[PATCH v2] video: ti: am335x: restore driver-model code
The commit 82f7b869f5d7a ("video: Drop CONFIG_AM335X_LCD") removed not only the LCD legacy implementation but also the code with driver model support. The patch restores the code with driver model support.
Signed-off-by: Dario Binacchi dario.binacchi@amarulasolutions.com
---
Changes in v2: - Collapse the two patches: - Revert "video: Drop CONFIG_AM335X_LCD" - video: ti: am335x: drop pre-driver-model code into one only. - Fix the compilation failure.
drivers/video/Kconfig | 2 + drivers/video/Makefile | 1 + drivers/video/ti/Kconfig | 8 + drivers/video/ti/Makefile | 6 + drivers/video/ti/tilcdc-panel.c | 172 +++++++++++++ drivers/video/ti/tilcdc-panel.h | 14 ++ drivers/video/ti/tilcdc.c | 426 ++++++++++++++++++++++++++++++++ drivers/video/ti/tilcdc.h | 38 +++ 8 files changed, 667 insertions(+) create mode 100644 drivers/video/ti/Kconfig create mode 100644 drivers/video/ti/Makefile create mode 100644 drivers/video/ti/tilcdc-panel.c create mode 100644 drivers/video/ti/tilcdc-panel.h create mode 100644 drivers/video/ti/tilcdc.c create mode 100644 drivers/video/ti/tilcdc.h
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index c841b99bb30d..54fa93adb4f8 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -573,6 +573,8 @@ config ATMEL_HLCD help HLCDC supports video output to an attached LCD panel.
+source "drivers/video/ti/Kconfig" + source "drivers/video/exynos/Kconfig"
config LOGICORE_DP_TX diff --git a/drivers/video/Makefile b/drivers/video/Makefile index 40a871d638e9..b359b0784050 100644 --- a/drivers/video/Makefile +++ b/drivers/video/Makefile @@ -26,6 +26,7 @@ obj-${CONFIG_EXYNOS_FB} += exynos/ obj-${CONFIG_VIDEO_ROCKCHIP} += rockchip/ obj-${CONFIG_VIDEO_STM32} += stm32/ obj-${CONFIG_VIDEO_TEGRA124} += tegra124/ +obj-y += ti/
obj-$(CONFIG_ATMEL_HLCD) += atmel_hlcdfb.o obj-$(CONFIG_ATMEL_LCD) += atmel_lcdfb.o diff --git a/drivers/video/ti/Kconfig b/drivers/video/ti/Kconfig new file mode 100644 index 000000000000..3081e9e8c09b --- /dev/null +++ b/drivers/video/ti/Kconfig @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# Copyright (C) 2020 Dario Binacchi dariobin@libero.it +# +config AM335X_LCD + bool "Enable AM335x video support" + help + Supports video output to an attached LCD panel. diff --git a/drivers/video/ti/Makefile b/drivers/video/ti/Makefile new file mode 100644 index 000000000000..1f551c84f347 --- /dev/null +++ b/drivers/video/ti/Makefile @@ -0,0 +1,6 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# Copyright (C) 2020 Dario Binacchi dariobin@libero.it +# + +obj-$(CONFIG_AM335X_LCD) += tilcdc.o tilcdc-panel.o diff --git a/drivers/video/ti/tilcdc-panel.c b/drivers/video/ti/tilcdc-panel.c new file mode 100644 index 000000000000..df95086a5151 --- /dev/null +++ b/drivers/video/ti/tilcdc-panel.c @@ -0,0 +1,172 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * OMAP panel support + * + * Copyright (C) 2020 Dario Binacchi dariobin@libero.it + */ + +#include <common.h> +#include <backlight.h> +#include <clk.h> +#include <display.h> +#include <dm.h> +#include <dm/device_compat.h> +#include <log.h> +#include <panel.h> +#include <asm/gpio.h> +#include <linux/err.h> +#include "tilcdc.h" + +struct tilcdc_panel_priv { + struct tilcdc_panel_info info; + struct display_timing timing; + struct udevice *backlight; + struct gpio_desc enable; +}; + +static int tilcdc_panel_enable_backlight(struct udevice *dev) +{ + struct tilcdc_panel_priv *priv = dev_get_priv(dev); + + if (dm_gpio_is_valid(&priv->enable)) + dm_gpio_set_value(&priv->enable, 1); + + if (priv->backlight) + return backlight_enable(priv->backlight); + + return 0; +} + +static int tilcdc_panel_set_backlight(struct udevice *dev, int percent) +{ + struct tilcdc_panel_priv *priv = dev_get_priv(dev); + + if (dm_gpio_is_valid(&priv->enable)) + dm_gpio_set_value(&priv->enable, 1); + + if (priv->backlight) + return backlight_set_brightness(priv->backlight, percent); + + return 0; +} + +int tilcdc_panel_get_display_info(struct udevice *dev, + struct tilcdc_panel_info *info) +{ + struct tilcdc_panel_priv *priv = dev_get_priv(dev); + + memcpy(info, &priv->info, sizeof(*info)); + return 0; +} + +static int tilcdc_panel_get_display_timing(struct udevice *dev, + struct display_timing *timing) +{ + struct tilcdc_panel_priv *priv = dev_get_priv(dev); + + memcpy(timing, &priv->timing, sizeof(*timing)); + return 0; +} + +static int tilcdc_panel_remove(struct udevice *dev) +{ + struct tilcdc_panel_priv *priv = dev_get_priv(dev); + + if (dm_gpio_is_valid(&priv->enable)) + dm_gpio_free(dev, &priv->enable); + + return 0; +} + +static int tilcdc_panel_probe(struct udevice *dev) +{ + struct tilcdc_panel_priv *priv = dev_get_priv(dev); + int err; + + err = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev, + "backlight", &priv->backlight); + if (err) + dev_warn(dev, "failed to get backlight\n"); + + err = gpio_request_by_name(dev, "enable-gpios", 0, &priv->enable, + GPIOD_IS_OUT); + if (err) { + dev_warn(dev, "failed to get enable GPIO\n"); + if (err != -ENOENT) + return err; + } + + return 0; +} + +static int tilcdc_panel_of_to_plat(struct udevice *dev) +{ + struct tilcdc_panel_priv *priv = dev_get_priv(dev); + ofnode node; + int err; + + err = ofnode_decode_display_timing(dev_ofnode(dev), 0, &priv->timing); + if (err) { + dev_err(dev, "failed to get display timing\n"); + return err; + } + + node = dev_read_subnode(dev, "panel-info"); + if (!ofnode_valid(node)) { + dev_err(dev, "missing 'panel-info' node\n"); + return -ENXIO; + } + + err |= ofnode_read_u32(node, "ac-bias", &priv->info.ac_bias); + err |= ofnode_read_u32(node, "ac-bias-intrpt", + &priv->info.ac_bias_intrpt); + err |= ofnode_read_u32(node, "dma-burst-sz", &priv->info.dma_burst_sz); + err |= ofnode_read_u32(node, "bpp", &priv->info.bpp); + err |= ofnode_read_u32(node, "fdd", &priv->info.fdd); + err |= ofnode_read_u32(node, "sync-edge", &priv->info.sync_edge); + err |= ofnode_read_u32(node, "sync-ctrl", &priv->info.sync_ctrl); + err |= ofnode_read_u32(node, "raster-order", &priv->info.raster_order); + err |= ofnode_read_u32(node, "fifo-th", &priv->info.fifo_th); + if (err) { + dev_err(dev, "failed to get panel info\n"); + return err; + } + + /* optional */ + priv->info.tft_alt_mode = ofnode_read_bool(node, "tft-alt-mode"); + priv->info.invert_pxl_clk = ofnode_read_bool(node, "invert-pxl-clk"); + + dev_dbg(dev, "LCD: %dx%d, bpp=%d, clk=%d Hz\n", + priv->timing.hactive.typ, priv->timing.vactive.typ, + priv->info.bpp, priv->timing.pixelclock.typ); + dev_dbg(dev, " hbp=%d, hfp=%d, hsw=%d\n", + priv->timing.hback_porch.typ, priv->timing.hfront_porch.typ, + priv->timing.hsync_len.typ); + dev_dbg(dev, " vbp=%d, vfp=%d, vsw=%d\n", + priv->timing.vback_porch.typ, priv->timing.vfront_porch.typ, + priv->timing.vsync_len.typ); + + return 0; +} + +static const struct panel_ops tilcdc_panel_ops = { + .enable_backlight = tilcdc_panel_enable_backlight, + .set_backlight = tilcdc_panel_set_backlight, + .get_display_timing = tilcdc_panel_get_display_timing, +}; + +static const struct udevice_id tilcdc_panel_ids[] = { + {.compatible = "ti,tilcdc,panel"}, + {} +}; + +U_BOOT_DRIVER(tilcdc_panel) = { + .name = "tilcdc_panel", + .id = UCLASS_PANEL, + .of_match = tilcdc_panel_ids, + .ops = &tilcdc_panel_ops, + .of_to_plat = tilcdc_panel_of_to_plat, + .probe = tilcdc_panel_probe, + .remove = tilcdc_panel_remove, + .priv_auto = sizeof(struct tilcdc_panel_priv), +}; diff --git a/drivers/video/ti/tilcdc-panel.h b/drivers/video/ti/tilcdc-panel.h new file mode 100644 index 000000000000..6bcfbf8a8b4c --- /dev/null +++ b/drivers/video/ti/tilcdc-panel.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2020 Dario Binacchi dariobin@libero.it + */ + +#ifndef _TILCDC_PANEL_H +#define _TILCDC_PANEL_H + +#include "tilcdc.h" + +int tilcdc_panel_get_display_info(struct udevice *dev, + struct tilcdc_panel_info *info); + +#endif /* _TILCDC_PANEL_H */ diff --git a/drivers/video/ti/tilcdc.c b/drivers/video/ti/tilcdc.c new file mode 100644 index 000000000000..90c1edd87e6f --- /dev/null +++ b/drivers/video/ti/tilcdc.c @@ -0,0 +1,426 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2020 Dario Binacchi dariobin@libero.it + */ + +#include <common.h> +#include <clk.h> +#include <dm.h> +#include <dm/device_compat.h> +#include <lcd.h> +#include <log.h> +#include <panel.h> +#include <video.h> +#include <asm/global_data.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 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_plat *uc_plat = dev_get_uclass_plat(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); + return 0; +} + +static int tilcdc_probe(struct udevice *dev) +{ + struct video_uc_plat *uc_plat = dev_get_uclass_plat(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 = uclass_get_device_by_name(UCLASS_CLK, "lcd_gclk@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@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_of_to_plat(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_plat *uc_plat = dev_get_uclass_plat(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, + .of_to_plat = tilcdc_of_to_plat, + .probe = tilcdc_probe, + .remove = tilcdc_remove, + .priv_auto = sizeof(struct tilcdc_priv) +}; diff --git a/drivers/video/ti/tilcdc.h b/drivers/video/ti/tilcdc.h new file mode 100644 index 000000000000..2645921df651 --- /dev/null +++ b/drivers/video/ti/tilcdc.h @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2020 Dario Binacchi dariobin@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 */
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Dario Binacchi