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sunxi: video: Add hpd option

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Allow the user to specify hpd=0 as option in the video-mode env. variable,
if hpd is set to 0 then the hdmi output will be brought up even if no cable
is connected.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Acked-by: Anatolij Gustschin <agust@denx.de>
This commit is contained in:
Hans de Goede 2014-12-19 15:13:57 +01:00
parent 5f33993b7e
commit 518cef20f8
1 changed files with 17 additions and 9 deletions
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26
drivers/video/sunxi_display.c
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@ -53,10 +53,16 @@ static int sunxi_hdmi_hpd_detect(void)
udelay(1000);
if (readl(&hdmi->hpd) & SUNXI_HDMI_HPD_DETECT)
return 1;
return (readl(&hdmi->hpd) & SUNXI_HDMI_HPD_DETECT) ? 1 : 0;
}
static void sunxi_hdmi_shutdown(void)
{
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;
/* No need to keep these running */
clrbits_le32(&hdmi->ctrl, SUNXI_HDMI_CTRL_ENABLE);
clrbits_le32(&ccm->hdmi_clk_cfg, CCM_HDMI_CTRL_GATE);
clrbits_le32(&ccm->ahb_gate1, 1 << AHB_GATE_OFFSET_HDMI);
@ -64,8 +70,6 @@ static int sunxi_hdmi_hpd_detect(void)
clrbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_HDMI);
#endif
clock_set_pll3(0);
return 0;
}
/*
@ -361,7 +365,7 @@ void *video_hw_init(void)
const struct ctfb_res_modes *mode;
const char *options;
unsigned int depth;
int ret;
int ret, hpd;
memset(&sunxi_display, 0, sizeof(struct sunxi_display));
@ -370,12 +374,16 @@ void *video_hw_init(void)
gd->fb_base = gd->ram_top;
video_get_ctfb_res_modes(RES_MODE_1024x768, 24, &mode, &depth, &options);
hpd = video_get_option_int(options, "hpd", 1);
/* Always call hdp_detect, as it also enables various clocks, etc. */
ret = sunxi_hdmi_hpd_detect();
if (!ret)
if (hpd && !ret) {
sunxi_hdmi_shutdown();
return NULL;
printf("HDMI connected.\n");
}
if (ret)
printf("HDMI connected: ");
if (mode->vmode != FB_VMODE_NONINTERLACED) {
printf("Only non-interlaced modes supported, falling back to 1024x768\n");