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/*
* Copyright © 2013 James Simmons
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors:
* James Simmons <jsimmons@infradead.org>
*/
#include "via_drv.h"
/*
* Routines for controlling stuff on the TMDS port
*/
static const struct drm_encoder_funcs via_tmds_enc_funcs = {
.destroy = via_encoder_cleanup,
};
/* Manage the power state of the DAC */
static void
via_tmds_dpms(struct drm_encoder *encoder, int mode)
{
struct drm_via_private *dev_priv = encoder->dev->dev_private;
switch (mode) {
case DRM_MODE_DPMS_SUSPEND:
case DRM_MODE_DPMS_STANDBY:
case DRM_MODE_DPMS_OFF:
svga_wcrt_mask(VGABASE, 0xD2, BIT(4), BIT(4));
svga_wcrt_mask(VGABASE, 0x91, 0x00, BIT(0));
/* Internal TMDS only use DFP_L */
/* Turn on DVI panel path(Only for internal),
* otherwise, the screen of DVI will be black. */
svga_wcrt_mask(VGABASE, 0x91, 0x00, BIT(7));
/* Power on TMDS */
svga_wcrt_mask(VGABASE, 0xD2, 0x00, BIT(3));
break;
case DRM_MODE_DPMS_ON:
default:
svga_wcrt_mask(VGABASE, 0x91, BIT(7), BIT(7));
/* Power off TMDS */
svga_wcrt_mask(VGABASE, 0xD2, BIT(3), BIT(3));
break;
}
}
/* Pass our mode to the connectors and the CRTC to give them a chance to
* adjust it according to limitations or connector properties, and also
* a chance to reject the mode entirely. Usefule for things like scaling.
*/
static bool
via_tmds_mode_fixup(struct drm_encoder *encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
drm_mode_set_crtcinfo(adjusted_mode, 0);
return true;
}
static const struct drm_encoder_helper_funcs via_tmds_enc_helper_funcs = {
.dpms = via_tmds_dpms,
.mode_fixup = via_tmds_mode_fixup,
.mode_set = via_set_sync_polarity,
.prepare = via_encoder_prepare,
.commit = via_encoder_commit,
.disable = via_encoder_disable,
};
static enum drm_connector_status
via_dvi_detect(struct drm_connector *connector, bool force)
{
struct via_connector *con = container_of(connector, struct via_connector, base);
enum drm_connector_status ret = connector_status_disconnected;
struct edid *edid = NULL;
drm_mode_connector_update_edid_property(connector, edid);
if (con->ddc_bus) {
edid = drm_get_edid(connector, con->ddc_bus);
if (edid) {
if ((connector->connector_type == DRM_MODE_CONNECTOR_DVIA) ^
(edid->input & DRM_EDID_INPUT_DIGITAL)) {
drm_mode_connector_update_edid_property(connector, edid);
ret = connector_status_connected;
}
kfree(edid);
}
}
return ret;
}
static const struct drm_connector_funcs via_dvi_connector_funcs = {
.dpms = drm_helper_connector_dpms,
.detect = via_dvi_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.set_property = via_connector_set_property,
.destroy = via_connector_destroy,
};
static const struct drm_connector_helper_funcs via_dvi_connector_helper_funcs = {
.mode_valid = via_connector_mode_valid,
.get_modes = via_get_edid_modes,
.best_encoder = via_best_encoder,
};
int
via_tmds_init(struct drm_device *dev)
{
struct drm_via_private *dev_priv = dev->dev_private;
struct via_connector *con;
struct via_encoder *enc;
int i2c_port = 0x3D;
if (!(vga_rseq(VGABASE, 0x3E) & BIT(5))) {
DRM_INFO("Internal DVI not detected\n");
return 1;
}
enc = kzalloc(sizeof(*enc) + 2 * sizeof(*con), GFP_KERNEL);
if (!enc) {
DRM_ERROR("Failed to allocate connector and encoder\n");
return -ENOMEM;
}
/* Setup the encoders and attach them */
drm_encoder_init(dev, &enc->base, &via_tmds_enc_funcs, DRM_MODE_ENCODER_DAC);
drm_encoder_helper_add(&enc->base, &via_tmds_enc_helper_funcs);
enc->base.possible_crtcs = BIT(1) | BIT(0);
enc->base.possible_clones = 0;
enc->diPort = DISP_DI_DFPL;
/* Piece together our DVI-D connector */
con = &enc->cons[0];
drm_connector_init(dev, &con->base, &via_dvi_connector_funcs,
DRM_MODE_CONNECTOR_DVID);
drm_connector_helper_add(&con->base, &via_dvi_connector_helper_funcs);
drm_sysfs_connector_add(&con->base);
switch (dev->pdev->device) {
case PCI_DEVICE_ID_VIA_VT1122:
if (dev_priv->revision < VX800_REVISION_B1)
break;
case PCI_DEVICE_ID_VIA_VX875:
case PCI_DEVICE_ID_VIA_VX900_VGA:
i2c_port = 0x31;
break;
default:
break;
}
con->ddc_bus = via_find_ddc_bus(i2c_port);
con->base.doublescan_allowed = false;
con->base.interlace_allowed = true;
INIT_LIST_HEAD(&con->props);
drm_mode_connector_attach_encoder(&con->base, &enc->base);
/* Now handle the DVI-A case */
con = &enc->cons[1];
drm_connector_init(dev, &con->base, &via_dvi_connector_funcs,
DRM_MODE_CONNECTOR_DVIA);
drm_connector_helper_add(&con->base, &via_dvi_connector_helper_funcs);
drm_sysfs_connector_add(&con->base);
con->ddc_bus = via_find_ddc_bus(i2c_port);
con->base.doublescan_allowed = false;
con->base.interlace_allowed = true;
INIT_LIST_HEAD(&con->props);
drm_mode_connector_attach_encoder(&con->base, &enc->base);
return 0;
}
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