video: exynos_fb: add DT support for FIMD driver

Add function to parse FIMD data from device tree.
The driver still supports non-DT case.
Define panel_info statically in some file if you are not using DT.
If you have defined DT node for FIMD, panel_info will be filled
using the bindings of FIMD DT node.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

drivers/video/exynos_fb.c

@@ -23,6 +23,8 @@
 #include <config.h>
 #include <common.h>
 #include <lcd.h>
+#include <fdtdec.h>
+#include <libfdt.h>
 #include <asm/io.h>
 #include <asm/arch/cpu.h>
 #include <asm/arch/clock.h>
@@ -30,9 +32,12 @@
 #include <asm/arch/mipi_dsim.h>
 #include <asm/arch/dp_info.h>
 #include <asm/arch/system.h>
+#include <asm-generic/errno.h>
 
 #include "exynos_fb.h"
 
+DECLARE_GLOBAL_DATA_PTR;
+
 int lcd_line_length;
 int lcd_color_fg;
 int lcd_color_bg;
@@ -45,6 +50,20 @@ short console_row;
 
 static unsigned int panel_width, panel_height;
 
+/*
+ * board_init_f(arch/arm/lib/board.c) calls lcd_setmem() which needs
+ * panel_info.vl_col, panel_info.vl_row and panel_info.vl_bpix to reserve
+ * FB memory at a very early stage, i.e even before exynos_fimd_parse_dt()
+ * is called. So, we are forced to statically assign it.
+ */
+#ifdef CONFIG_OF_CONTROL
+vidinfo_t panel_info  = {
+	.vl_col = LCD_XRES,
+	.vl_row = LCD_YRES,
+	.vl_bpix = LCD_COLOR16,
+};
+#endif
+
 static void exynos_lcd_init_mem(void *lcdbase, vidinfo_t *vid)
 {
 	unsigned long palette_size;
@@ -164,11 +183,155 @@ static void lcd_panel_on(vidinfo_t *vid)
 		exynos_mipi_dsi_init();
 }
 
+#ifdef CONFIG_OF_CONTROL
+int exynos_fimd_parse_dt(const void *blob)
+{
+	unsigned int node;
+	node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS_FIMD);
+	if (node <= 0) {
+		debug("exynos_fb: Can't get device node for fimd\n");
+		return -ENODEV;
+	}
+
+	panel_info.vl_col = fdtdec_get_int(blob, node, "samsung,vl-col", 0);
+	if (panel_info.vl_col == 0) {
+		debug("Can't get XRES\n");
+		return -ENXIO;
+	}
+
+	panel_info.vl_row = fdtdec_get_int(blob, node, "samsung,vl-row", 0);
+	if (panel_info.vl_row == 0) {
+		debug("Can't get YRES\n");
+		return -ENXIO;
+	}
+
+	panel_info.vl_width = fdtdec_get_int(blob, node,
+						"samsung,vl-width", 0);
+
+	panel_info.vl_height = fdtdec_get_int(blob, node,
+						"samsung,vl-height", 0);
+
+	panel_info.vl_freq = fdtdec_get_int(blob, node, "samsung,vl-freq", 0);
+	if (panel_info.vl_freq == 0) {
+		debug("Can't get refresh rate\n");
+		return -ENXIO;
+	}
+
+	if (fdtdec_get_bool(blob, node, "samsung,vl-clkp"))
+		panel_info.vl_clkp = CONFIG_SYS_LOW;
+
+	if (fdtdec_get_bool(blob, node, "samsung,vl-oep"))
+		panel_info.vl_oep = CONFIG_SYS_LOW;
+
+	if (fdtdec_get_bool(blob, node, "samsung,vl-hsp"))
+		panel_info.vl_hsp = CONFIG_SYS_LOW;
+
+	if (fdtdec_get_bool(blob, node, "samsung,vl-vsp"))
+		panel_info.vl_vsp = CONFIG_SYS_LOW;
+
+	if (fdtdec_get_bool(blob, node, "samsung,vl-dp"))
+		panel_info.vl_dp = CONFIG_SYS_LOW;
+
+	panel_info.vl_bpix = fdtdec_get_int(blob, node, "samsung,vl-bpix", 0);
+	if (panel_info.vl_bpix == 0) {
+		debug("Can't get bits per pixel\n");
+		return -ENXIO;
+	}
+
+	panel_info.vl_hspw = fdtdec_get_int(blob, node, "samsung,vl-hspw", 0);
+	if (panel_info.vl_hspw == 0) {
+		debug("Can't get hsync width\n");
+		return -ENXIO;
+	}
+
+	panel_info.vl_hfpd = fdtdec_get_int(blob, node, "samsung,vl-hfpd", 0);
+	if (panel_info.vl_hfpd == 0) {
+		debug("Can't get right margin\n");
+		return -ENXIO;
+	}
+
+	panel_info.vl_hbpd = (u_char)fdtdec_get_int(blob, node,
+							"samsung,vl-hbpd", 0);
+	if (panel_info.vl_hbpd == 0) {
+		debug("Can't get left margin\n");
+		return -ENXIO;
+	}
+
+	panel_info.vl_vspw = (u_char)fdtdec_get_int(blob, node,
+							"samsung,vl-vspw", 0);
+	if (panel_info.vl_vspw == 0) {
+		debug("Can't get vsync width\n");
+		return -ENXIO;
+	}
+
+	panel_info.vl_vfpd = fdtdec_get_int(blob, node,
+							"samsung,vl-vfpd", 0);
+	if (panel_info.vl_vfpd == 0) {
+		debug("Can't get lower margin\n");
+		return -ENXIO;
+	}
+
+	panel_info.vl_vbpd = fdtdec_get_int(blob, node, "samsung,vl-vbpd", 0);
+	if (panel_info.vl_vbpd == 0) {
+		debug("Can't get upper margin\n");
+		return -ENXIO;
+	}
+
+	panel_info.vl_cmd_allow_len = fdtdec_get_int(blob, node,
+						"samsung,vl-cmd-allow-len", 0);
+
+	panel_info.win_id = fdtdec_get_int(blob, node, "samsung,winid", 0);
+	panel_info.init_delay = fdtdec_get_int(blob, node,
+						"samsung,init-delay", 0);
+	panel_info.power_on_delay = fdtdec_get_int(blob, node,
+						"samsung,power-on-delay", 0);
+	panel_info.reset_delay = fdtdec_get_int(blob, node,
+						"samsung,reset-delay", 0);
+	panel_info.interface_mode = fdtdec_get_int(blob, node,
+						"samsung,interface-mode", 0);
+	panel_info.mipi_enabled = fdtdec_get_int(blob, node,
+						"samsung,mipi-enabled", 0);
+	panel_info.dp_enabled = fdtdec_get_int(blob, node,
+						"samsung,dp-enabled", 0);
+	panel_info.cs_setup = fdtdec_get_int(blob, node,
+						"samsung,cs-setup", 0);
+	panel_info.wr_setup = fdtdec_get_int(blob, node,
+						"samsung,wr-setup", 0);
+	panel_info.wr_act = fdtdec_get_int(blob, node, "samsung,wr-act", 0);
+	panel_info.wr_hold = fdtdec_get_int(blob, node, "samsung,wr-hold", 0);
+
+	panel_info.logo_on = fdtdec_get_int(blob, node, "samsung,logo-on", 0);
+	if (panel_info.logo_on) {
+		panel_info.logo_width = fdtdec_get_int(blob, node,
+						"samsung,logo-width", 0);
+		panel_info.logo_height = fdtdec_get_int(blob, node,
+						"samsung,logo-height", 0);
+		panel_info.logo_addr = fdtdec_get_int(blob, node,
+						"samsung,logo-addr", 0);
+	}
+
+	panel_info.rgb_mode = fdtdec_get_int(blob, node,
+						"samsung,rgb-mode", 0);
+	panel_info.pclk_name = fdtdec_get_int(blob, node,
+						"samsung,pclk-name", 0);
+	panel_info.sclk_div = fdtdec_get_int(blob, node,
+						"samsung,sclk-div", 0);
+	panel_info.dual_lcd_enabled = fdtdec_get_int(blob, node,
+						"samsung,dual-lcd-enabled", 0);
+
+	return 0;
+}
+#endif
+
 void lcd_ctrl_init(void *lcdbase)
 {
 	set_system_display_ctrl();
 	set_lcd_clk();
 
+#ifdef CONFIG_OF_CONTROL
+	if (exynos_fimd_parse_dt(gd->fdt_blob))
+		debug("Can't get proper panel info\n");
+#endif
 	/* initialize parameters which is specific to panel. */
 	init_panel_info(&panel_info);
 

drivers/video/exynos_fimd.c

@@ -25,11 +25,15 @@
 #include <asm/io.h>
 #include <lcd.h>
 #include <div64.h>
+#include <fdtdec.h>
+#include <libfdt.h>
 #include <asm/arch/clk.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/cpu.h>
 #include "exynos_fb.h"
 
+DECLARE_GLOBAL_DATA_PTR;
+
 static unsigned long *lcd_base_addr;
 static vidinfo_t *pvid;
 static struct exynos_fb *fimd_ctrl;
@@ -264,6 +268,19 @@ void exynos_fimd_lcd_init(vidinfo_t *vid)
 {
 	unsigned int cfg = 0, rgb_mode;
 	unsigned int offset;
+#ifdef CONFIG_OF_CONTROL
+	unsigned int node;
+
+	node = fdtdec_next_compatible(gd->fdt_blob,
+					0, COMPAT_SAMSUNG_EXYNOS_FIMD);
+	if (node <= 0)
+		debug("exynos_fb: Can't get device node for fimd\n");
+
+	fimd_ctrl = (struct exynos_fb *)fdtdec_get_addr(gd->fdt_blob,
+								node, "reg");
+	if (fimd_ctrl == NULL)
+		debug("Can't get the FIMD base address\n");
+#endif
 	fimd_ctrl = (struct exynos_fb *)samsung_get_base_fimd();
 
 	offset = exynos_fimd_get_base_offset();