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| author | Hans de Goede <hdegoede@redhat.com> | 2014-12-28 09:13:21 +0100 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2015-01-14 14:56:39 +0100 |
| commit | 7fad8a98020a0ead8b7bdd5f6b5eaf49b91658b5 (patch) | |
| tree | 9be5434cca311768081bbbf62b53c3aceae6ae85 /drivers/video/sunxi_display.c | |
| parent | d9786d23808fcbc5dd3bd3913b036d42dd48653f (diff) | |
| download | u-boot-imx-7fad8a98020a0ead8b7bdd5f6b5eaf49b91658b5.zip u-boot-imx-7fad8a98020a0ead8b7bdd5f6b5eaf49b91658b5.tar.gz u-boot-imx-7fad8a98020a0ead8b7bdd5f6b5eaf49b91658b5.tar.bz2 | |
sunxi: video: Add a hpd_delay parameter to configure hpd delay
In some extreme cases it may be necessary to wait 1.5 seconds or more for a hpd
signal to show up (and be able to read edid info), but we do not want to
penalize all headless boots with an extra second boot delay, so add a hpd_delay
parameter which can be set through the video-mode env. variable.
While at it raise the default from 300ms to 500ms as 300 may very well be too
low in many cases.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Diffstat (limited to 'drivers/video/sunxi_display.c')
| -rw-r--r-- | drivers/video/sunxi_display.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/video/sunxi_display.c b/drivers/video/sunxi_display.c index 536e1ca..8241492 100644 --- a/drivers/video/sunxi_display.c +++ b/drivers/video/sunxi_display.c @@ -56,13 +56,13 @@ static int await_completion(u32 *reg, u32 mask, u32 val) return 0; } -static int sunxi_hdmi_hpd_detect(void) +static int sunxi_hdmi_hpd_detect(int hpd_delay) { struct sunxi_ccm_reg * const ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; struct sunxi_hdmi_reg * const hdmi = (struct sunxi_hdmi_reg *)SUNXI_HDMI_BASE; - unsigned long tmo = timer_get_us() + 300000; + unsigned long tmo = timer_get_us() + hpd_delay * 1000; /* Set pll3 to 300MHz */ clock_set_pll3(300000000); @@ -851,7 +851,7 @@ void *video_hw_init(void) struct ctfb_res_modes custom; const char *options; #ifdef CONFIG_VIDEO_HDMI - int ret, hpd, edid; + int ret, hpd, hpd_delay, edid; #endif char mon[16]; char *lcd_mode = CONFIG_VIDEO_LCD_MODE; @@ -867,6 +867,7 @@ void *video_hw_init(void) &sunxi_display.depth, &options); #ifdef CONFIG_VIDEO_HDMI hpd = video_get_option_int(options, "hpd", 1); + hpd_delay = video_get_option_int(options, "hpd_delay", 500); edid = video_get_option_int(options, "edid", 1); sunxi_display.monitor = sunxi_monitor_dvi; #elif defined CONFIG_VIDEO_VGA_VIA_LCD @@ -891,7 +892,7 @@ void *video_hw_init(void) if (sunxi_display.monitor == sunxi_monitor_dvi || sunxi_display.monitor == sunxi_monitor_hdmi) { /* Always call hdp_detect, as it also enables clocks, etc. */ - ret = sunxi_hdmi_hpd_detect(); + ret = sunxi_hdmi_hpd_detect(hpd_delay); if (ret) { printf("HDMI connected: "); if (edid && sunxi_hdmi_edid_get_mode(&custom) == 0) |