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authorHans de Goede <hdegoede@redhat.com>2014-12-20 14:31:45 +0100
committerHans de Goede <hdegoede@redhat.com>2015-01-14 14:56:38 +0100
commitf300068ddd85914dbec48d9ef2381b6f3ad92fc3 (patch)
tree6445e3f5bb4d33b057fec666a33e4c35f5fe96f7 /drivers/video/sunxi_display.c
parent63c5fbdfb9f4c4f735f5f8d21f2c6156cc5c6546 (diff)
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sunxi: video: When using edid use CEA681 extension blocks to select hdmi output
When using edid use CEA681 edid extension blocks to select between dvi and hdmi output formats, so that u-boot will automatically do the right thing. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk> Acked-by: Anatolij Gustschin <agust@denx.de>
Diffstat (limited to 'drivers/video/sunxi_display.c')
-rw-r--r--drivers/video/sunxi_display.c43
1 files changed, 34 insertions, 9 deletions
diff --git a/drivers/video/sunxi_display.c b/drivers/video/sunxi_display.c
index 3048410..795835d 100644
--- a/drivers/video/sunxi_display.c
+++ b/drivers/video/sunxi_display.c
@@ -155,16 +155,17 @@ static int sunxi_hdmi_edid_get_block(int block, u8 *buf)
return r;
}
-static int sunxi_hdmi_edid_get_mode(struct ctfb_res_modes *mode)
+static int sunxi_hdmi_edid_get_mode(struct ctfb_res_modes *mode, char *monitor)
{
struct edid1_info edid1;
+ struct edid_cea861_info cea681[4];
struct edid_detailed_timing *t =
(struct edid_detailed_timing *)edid1.monitor_details.timing;
struct sunxi_hdmi_reg * const hdmi =
(struct sunxi_hdmi_reg *)SUNXI_HDMI_BASE;
struct sunxi_ccm_reg * const ccm =
(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
- int i, r;
+ int i, r, ext_blocks = 0;
/* SUNXI_HDMI_CTRL_ENABLE & PAD_CTRL0 are already set by hpd_detect */
writel(SUNXI_HDMI_PAD_CTRL1 | SUNXI_HDMI_PAD_CTRL1_HALVE,
@@ -189,6 +190,25 @@ static int sunxi_hdmi_edid_get_mode(struct ctfb_res_modes *mode)
#endif
r = sunxi_hdmi_edid_get_block(0, (u8 *)&edid1);
+ if (r == 0) {
+ r = edid_check_info(&edid1);
+ if (r) {
+ printf("EDID: invalid EDID data\n");
+ r = -EINVAL;
+ }
+ }
+ if (r == 0) {
+ ext_blocks = edid1.extension_flag;
+ if (ext_blocks > 4)
+ ext_blocks = 4;
+ for (i = 0; i < ext_blocks; i++) {
+ if (sunxi_hdmi_edid_get_block(1 + i,
+ (u8 *)&cea681[i]) != 0) {
+ ext_blocks = i;
+ break;
+ }
+ }
+ }
/* Disable DDC engine, no longer needed */
clrbits_le32(&hdmi->ddc_ctrl, SUNXI_HMDI_DDC_CTRL_ENABLE);
@@ -197,12 +217,6 @@ static int sunxi_hdmi_edid_get_mode(struct ctfb_res_modes *mode)
if (r)
return r;
- r = edid_check_info(&edid1);
- if (r) {
- printf("EDID: invalid EDID data\n");
- return -EINVAL;
- }
-
/* We want version 1.3 or 1.2 with detailed timing info */
if (edid1.version != 1 || (edid1.revision < 3 &&
!EDID1_INFO_FEATURE_PREFERRED_TIMING_MODE(edid1))) {
@@ -222,6 +236,17 @@ static int sunxi_hdmi_edid_get_mode(struct ctfb_res_modes *mode)
return -ENOENT;
}
+ /* Check for basic audio support, if found enable hdmi output */
+ strcpy(monitor, "dvi");
+ for (i = 0; i < ext_blocks; i++) {
+ if (cea681[i].extension_tag != EDID_CEA861_EXTENSION_TAG ||
+ cea681[i].revision < 2)
+ continue;
+
+ if (EDID_CEA861_SUPPORTS_BASIC_AUDIO(cea681[i]))
+ strcpy(monitor, "hdmi");
+ }
+
return 0;
}
@@ -597,7 +622,7 @@ void *video_hw_init(void)
/* Check edid if requested and we've a cable plugged in */
if (edid && ret) {
- if (sunxi_hdmi_edid_get_mode(&edid_mode) == 0)
+ if (sunxi_hdmi_edid_get_mode(&edid_mode, monitor) == 0)
mode = &edid_mode;
}