Hi all,
I want to change RGB output resolution of i.mx28 evk board. I have modified the file lcd_43wvf1g.c (attached), in particular I changed the following define to obtain a resolution of 720x480
#define DOTCLK_H_ACTIVE 720
#define DOTCLK_H_PULSE_WIDTH 62
#define DOTCLK_HF_PORCH 16
#define DOTCLK_HB_PORCH 60
#define DOTCLK_H_WAIT_CNT (DOTCLK_H_PULSE_WIDTH + DOTCLK_HB_PORCH)
#define DOTCLK_H_PERIOD (DOTCLK_H_WAIT_CNT + DOTCLK_HF_PORCH + DOTCLK_H_ACTIVE)
#define DOTCLK_V_ACTIVE 480
#define DOTCLK_V_PULSE_WIDTH 6
#define DOTCLK_VF_PORCH 9
#define DOTCLK_VB_PORCH 30
#define DOTCLK_V_WAIT_CNT (DOTCLK_V_PULSE_WIDTH + DOTCLK_VB_PORCH)
#define DOTCLK_V_PERIOD (DOTCLK_VF_PORCH + DOTCLK_V_ACTIVE + DOTCLK_V_WAIT_CNT)
The problem is that, for example, the Linux penguin is shown on the display only if I set the values of x_res to 800 and y_res to 480 in lcd_43wvf1g.c file, as shown below:
static struct mxs_platform_fb_entry fb_entry = {
.name = "43wvf1g",
.x_res = 480,
.y_res = 800,
.bpp = 32,
.cycle_time_ns = 37,
.lcd_type = MXS_LCD_PANEL_DOTCLK,
.init_panel = init_panel,
.release_panel = release_panel,
.blank_panel = blank_panel,
.run_panel = mxs_lcdif_run,
.stop_panel = mxs_lcdif_stop,
.pan_display = mxs_lcdif_pan_display,
.bl_data = &bl_data,
};
If I set the x_res value to 720 I see the display all black. Why?
Do you have any suggestion or do you have a general suggestion on how to change the display resolution?
Thanks!!
Original Attachment has been moved to: lcd_43wvf1g.c.zip
