tegra: video: support eDP displays on Tegra124 devices

Connect up the clocks and the eDP driver to make these displays work with
Tegra124-based devices.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Tom Warren <twarren@nvidia.com>

1 files changed, 97 insertions, 0 deletions

diff --git a/drivers/video/tegra124/tegra124-lcd.c b/drivers/video/tegra124/tegra124-lcd.c
new file mode 100644
index 0000000000..2733590754
--- /dev/null
+++ b/drivers/video/tegra124/tegra124-lcd.c
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ *
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <lcd.h>
+#include <asm/gpio.h>
+#include <asm/arch-tegra/clk_rst.h>
+#include <asm/arch/clock.h>
+#include <asm/arch-tegra/dc.h>
+#include <asm/io.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+enum {
+	/* Maximum LCD size we support */
+	LCD_MAX_WIDTH		= 1920,
+	LCD_MAX_HEIGHT		= 1200,
+	LCD_MAX_LOG2_BPP	= 4,		/* 2^4 = 16 bpp */
+};
+
+vidinfo_t panel_info = {
+	/* Insert a value here so that we don't end up in the BSS */
+	.vl_col = -1,
+};
+
+int tegra_lcd_check_next_stage(const void *blob, int wait)
+{
+	return 0;
+}
+
+void tegra_lcd_early_init(const void *blob)
+{
+	/*
+	 * Go with the maximum size for now. We will fix this up after
+	 * relocation. These values are only used for memory alocation.
+	 */
+	panel_info.vl_col = LCD_MAX_WIDTH;
+	panel_info.vl_row = LCD_MAX_HEIGHT;
+	panel_info.vl_bpix = LCD_MAX_LOG2_BPP;
+}
+
+static int tegra124_lcd_init(void *lcdbase)
+{
+	struct display_timing timing;
+	int ret;
+
+	clock_set_up_plldp();
+	clock_adjust_periph_pll_div(PERIPH_ID_HOST1X, CLOCK_ID_PERIPH,
+				    408000000, NULL);
+
+	clock_enable(PERIPH_ID_HOST1X);
+	clock_enable(PERIPH_ID_DISP1);
+	clock_enable(PERIPH_ID_PWM);
+	clock_enable(PERIPH_ID_DPAUX);
+	clock_enable(PERIPH_ID_SOR0);
+
+	udelay(2);
+
+	reset_set_enable(PERIPH_ID_HOST1X, 0);
+	reset_set_enable(PERIPH_ID_DISP1, 0);
+	reset_set_enable(PERIPH_ID_PWM, 0);
+	reset_set_enable(PERIPH_ID_DPAUX, 0);
+	reset_set_enable(PERIPH_ID_SOR0, 0);
+
+	ret = display_init(lcdbase, 1 << LCD_BPP, &timing);
+	if (ret)
+		return ret;
+
+	panel_info.vl_col = roundup(timing.hactive.typ, 16);
+	panel_info.vl_row = timing.vactive.typ;
+
+	lcd_set_flush_dcache(1);
+
+	return 0;
+}
+
+void lcd_ctrl_init(void *lcdbase)
+{
+	ulong start;
+	int ret;
+
+	start = get_timer(0);
+	ret = tegra124_lcd_init(lcdbase);
+	debug("LCD init took %lu ms\n", get_timer(start));
+	if (ret)
+		printf("%s: Error %d\n", __func__, ret);
+}
+
+void lcd_enable(void)
+{
+}