drivers/gpu/drm/openchrome/via_analog.c | 90 ++++++++++++++++++++++++++++++-
drivers/gpu/drm/openchrome/via_display.c | 2
drivers/gpu/drm/openchrome/via_display.h | 1
drivers/gpu/drm/openchrome/via_drv.h | 3 -
4 files changed, 93 insertions(+), 3 deletions(-)
New commits:
commit 7bbc9a8b4e02ea643d970c26185b607ef4ae5135
Author: Kevin Brace <kevinbr...@gmx.com>
Date: Tue Feb 13 08:26:13 2018 -0800
drm/openchrome: Version bumped to 3.0.76
Adds I2C bus 2 support for analog (VGA) output. This will now allow
DVI to VGA passive converter to work properly in most cases.
Signed-off-by: Kevin Brace <kevinbr...@gmx.com>
diff --git a/drivers/gpu/drm/openchrome/via_drv.h
b/drivers/gpu/drm/openchrome/via_drv.h
index 426a5d4d3751..070599f2c8a8 100644
--- a/drivers/gpu/drm/openchrome/via_drv.h
+++ b/drivers/gpu/drm/openchrome/via_drv.h
@@ -34,7 +34,7 @@
#define DRIVER_MAJOR 3
#define DRIVER_MINOR 0
-#define DRIVER_PATCHLEVEL 75
+#define DRIVER_PATCHLEVEL 76
#include <linux/module.h>
commit fc30c233ce774a331cd6f34a2252f7fe0e42df12
Author: Kevin Brace <kevinbr...@gmx.com>
Date: Tue Feb 13 08:21:44 2018 -0800
drm/openchrome: Add I2C bus 2 support for analog (VGA) output
Many DVI connectors are DVI-I type and analog signals come out of a
DVI-I connector. However, in many cases its I2C bus used is I2C bus 2,
but the support code for I2C bus 2 support with analog (VGA) output
was previously missing. This commit will now allow DVI to VGA passive
converter to work properly in most cases.
Signed-off-by: Kevin Brace <kevinbr...@gmx.com>
diff --git a/drivers/gpu/drm/openchrome/via_analog.c
b/drivers/gpu/drm/openchrome/via_analog.c
index 960b8eea2618..f113aa959675 100644
--- a/drivers/gpu/drm/openchrome/via_analog.c
+++ b/drivers/gpu/drm/openchrome/via_analog.c
@@ -238,9 +238,28 @@ via_analog_detect(struct drm_connector *connector, bool
force)
edid);
kfree(edid);
ret = connector_status_connected;
+ goto exit;
}
}
+ if (con->i2c_bus & VIA_I2C_BUS2) {
+ i2c_bus = via_find_ddc_bus(0x31);
+ } else {
+ i2c_bus = NULL;
+ }
+
+ if (i2c_bus) {
+ edid = drm_get_edid(&con->base, i2c_bus);
+ if (edid) {
+ drm_mode_connector_update_edid_property(connector,
+ edid);
+ kfree(edid);
+ ret = connector_status_connected;
+ goto exit;
+ }
+ }
+
+exit:
DRM_DEBUG_KMS("Exiting %s.\n", __func__);
return ret;
}
@@ -274,9 +293,26 @@ static int via_analog_get_modes(struct drm_connector
*connector)
if (edid) {
count = drm_add_edid_modes(connector, edid);
kfree(edid);
+ goto exit;
+ }
+ }
+
+ if (con->i2c_bus & VIA_I2C_BUS2) {
+ i2c_bus = via_find_ddc_bus(0x31);
+ } else {
+ i2c_bus = NULL;
+ }
+
+ if (i2c_bus) {
+ edid = drm_get_edid(&con->base, i2c_bus);
+ if (edid) {
+ count = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+ goto exit;
}
}
+exit:
DRM_DEBUG_KMS("Exiting %s.\n", __func__);
return count;
}
@@ -287,14 +323,64 @@ static const struct drm_connector_helper_funcs
via_analog_connector_helper_funcs
.best_encoder = via_best_encoder,
};
+void via_analog_probe(struct drm_device *dev)
+{
+ struct via_device *dev_priv = dev->dev_private;
+ u16 chipset = dev->pdev->device;
+ u8 sr13, sr5a;
+
+ DRM_DEBUG_KMS("Entered %s.\n", __func__);
+
+ switch (chipset) {
+ case PCI_DEVICE_ID_VIA_VT3157:
+ case PCI_DEVICE_ID_VIA_VT1122:
+ case PCI_DEVICE_ID_VIA_VX875:
+ case PCI_DEVICE_ID_VIA_VX900_VGA:
+ sr5a = vga_rseq(VGABASE, 0x5a);
+ DRM_DEBUG_KMS("SR5A: 0x%02x\n", sr5a);
+
+ /* Setting SR5A[0] to 1.
+ * This allows the reading out the alternative
+ * pin strapping information from SR12 and SR13. */
+ svga_wseq_mask(VGABASE, 0x5a, BIT(0), BIT(0));
+ DRM_DEBUG_KMS("SR5A: 0x%02x\n", sr5a);
+
+ sr13 = vga_rseq(VGABASE, 0x13);
+ DRM_DEBUG_KMS("SR13: 0x%02x\n", sr13);
+
+ if (!(sr13 & BIT(2))) {
+ dev_priv->analog_presence = true;
+ DRM_DEBUG_KMS("Detected the presence of VGA.\n");
+ } else {
+ dev_priv->analog_presence = false;
+ }
+
+ /* Restore SR5A. */
+ vga_wseq(VGABASE, 0x5a, sr5a);
+ break;
+ default:
+ dev_priv->analog_presence = true;
+ DRM_DEBUG_KMS("Detected the presence of VGA.\n");
+ break;
+ }
+
+ dev_priv->analog_i2c_bus = VIA_I2C_NONE;
+
+ if (dev_priv->analog_presence) {
+ dev_priv->analog_i2c_bus = VIA_I2C_BUS2 | VIA_I2C_BUS1;
+ }
+
+ dev_priv->mapped_i2c_bus |= dev_priv->analog_i2c_bus;
+
+ DRM_DEBUG_KMS("Exiting %s.\n", __func__);
+}
+
void via_analog_init(struct drm_device *dev)
{
struct via_connector *con;
struct via_encoder *enc;
struct via_device *dev_priv = dev->dev_private;
- dev_priv->analog_i2c_bus = VIA_I2C_BUS1;
-
enc = kzalloc(sizeof(*enc) + sizeof(*con), GFP_KERNEL);
if (!enc) {
DRM_ERROR("Failed to allocate connector and encoder\n");
diff --git a/drivers/gpu/drm/openchrome/via_display.c
b/drivers/gpu/drm/openchrome/via_display.c
index 8cdca0ce81b6..df104e6f9172 100644
--- a/drivers/gpu/drm/openchrome/via_display.c
+++ b/drivers/gpu/drm/openchrome/via_display.c
@@ -508,6 +508,8 @@ via_modeset_init(struct drm_device *dev)
via_fp_probe(dev);
+ via_analog_probe(dev);
+
via_tmds_init(dev);
diff --git a/drivers/gpu/drm/openchrome/via_display.h
b/drivers/gpu/drm/openchrome/via_display.h
index 938719b6ccd9..5aee32723bca 100644
--- a/drivers/gpu/drm/openchrome/via_display.h
+++ b/drivers/gpu/drm/openchrome/via_display.h
@@ -182,6 +182,7 @@ extern int via_connector_mode_valid(struct drm_connector
*connector,
struct drm_display_mode *mode);
extern void via_connector_destroy(struct drm_connector *connector);
+extern void via_analog_probe(struct drm_device *dev);
extern void via_tmds_probe(struct drm_device *dev);
extern void via_fp_probe(struct drm_device *dev);
diff --git a/drivers/gpu/drm/openchrome/via_drv.h
b/drivers/gpu/drm/openchrome/via_drv.h
index d4e812e3ad57..426a5d4d3751 100644
--- a/drivers/gpu/drm/openchrome/via_drv.h
+++ b/drivers/gpu/drm/openchrome/via_drv.h
@@ -209,6 +209,7 @@ struct via_device {
* is needed for properly controlling its FP. */
bool is_quanta_il1;
+ bool analog_presence;
u32 analog_i2c_bus;
bool int_tmds_presence;
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