/*
* Copyright 2006 Dave Airlie <airlied@linux.ie>
* Copyright © 2006-2007 Intel Corporation
*
* 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:
* Eric Anholt <eric@anholt.net>
*/
#include <linux/i2c.h>
#include "drmP.h"
#include "drm.h"
#include "drm_crtc.h"
#include "intel_drv.h"
#include "i915_drm.h"
#include "i915_drv.h"
#include "dvo.h"
#define SIL164_ADDR 0x38
#define CH7xxx_ADDR 0x76
#define TFP410_ADDR 0x38
static struct intel_dvo_device intel_dvo_devices[] = {
{
.type = INTEL_DVO_CHIP_TMDS,
.name = "sil164",
.dvo_reg = DVOC,
.slave_addr = SIL164_ADDR,
.dev_ops = &sil164_ops,
},
{
.type = INTEL_DVO_CHIP_TMDS,
.name = "ch7xxx",
.dvo_reg = DVOC,
.slave_addr = CH7xxx_ADDR,
.dev_ops = &ch7xxx_ops,
},
{
.type = INTEL_DVO_CHIP_LVDS,
.name = "ivch",
.dvo_reg = DVOA,
.slave_addr = 0x02, /* Might also be 0x44, 0x84, 0xc4 */
.dev_ops = &ivch_ops,
},
{
.type = INTEL_DVO_CHIP_TMDS,
.name = "tfp410",
.dvo_reg = DVOC,
.slave_addr = TFP410_ADDR,
.dev_ops = &tfp410_ops,
},
{
.type = INTEL_DVO_CHIP_LVDS,
.name = "ch7017",
.dvo_reg = DVOC,
.slave_addr = 0x75,
.gpio = GPIOE,
.dev_ops = &ch7017_ops,
}
};
static void intel_dvo_dpms(struct drm_encoder *encoder, int mode)
{
struct drm_i915_private *dev_priv = encoder->dev->dev_private;
struct intel_output *intel_output = enc_to_intel_output(encoder);
struct intel_dvo_device *dvo = intel_output->dev_priv;
u32 dvo_reg = dvo->dvo_reg;
u32 temp = I915_READ(dvo_reg);
if (mode == DRM_MODE_DPMS_ON) {
I915_WRITE(dvo_reg, temp | DVO_ENABLE);
I915_READ(dvo_reg);
dvo->dev_ops->dpms(dvo, mode);
} else {
dvo->dev_ops->dpms(dvo, mode);
I915_WRITE(dvo_reg, temp & ~DVO_ENABLE);
I915_READ(dvo_reg);
}
}
static void intel_dvo_save(struct drm_connector *connector)
{
struct drm_i915_private *dev_priv = connector->dev->dev_private;
struct intel_output *intel_output = to_intel_output(connector);
struct intel_dvo_device *dvo = intel_output->dev_priv;
/* Each output should probably just save the registers it touches,
* but for now, use more overkill.
*/
dev_priv->saveDVOA = I915_READ(DVOA);
dev_priv->saveDVOB = I915_READ(DVOB);
dev_priv->saveDVOC = I915_READ(DVOC);
dvo->dev_ops->save(dvo);
}
static void intel_dvo_restore(struct drm_connector *connector)
{
struct drm_i915_private *dev_priv = connector->dev->dev_private;
struct intel_output *intel_output = to_intel_output(connector);
struct intel_dvo_device *dvo = intel_output->dev_priv;
dvo->dev_ops->restore(dvo);
I915_WRITE(DVOA, dev_priv->saveDVOA);
I915_WRITE(DVOB, dev_priv->saveDVOB);
I915_WRITE(DVOC, dev_priv->saveDVOC);
}
static int intel_dvo_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
struct intel_output *intel_output = to_intel_output(connector);
struct intel_dvo_device *dvo = intel_output->dev_priv;
if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
return MODE_NO_DBLESCAN;
/* XXX: Validate clock range */
if (dvo->panel_fixed_mode) {
if (mode->hdisplay > dvo->panel_fixed_mode->hdisplay)
return MODE_PANEL;
if (mode->vdisplay > dvo->panel_fixed_mode->vdisplay)
return MODE_PANEL;
}
return dvo->dev_ops->mode_valid(dvo, mode);
}
static bool intel_dvo_mode_fixup(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct intel_output *intel_output = enc_to_intel_output(encoder);
struct intel_dvo_device *dvo = intel_output->dev_priv;
/* If we have timings from the BIOS for the panel, put them in
* to the adjusted mode. The CRTC will be set up for this mode,
* with the panel scaling set up to source from the H/VDisplay
* of the original mode.
*/
if (dvo->panel_fixed_mode != NULL) {
#define C(x) adjusted_mode->x = dvo->panel_fixed_mode->x
C(hdisplay);
C(hsync_start);
C(hsync_end);
C(htotal);
C(vdisplay);
C(vsync_start);
C(vsync_end);
C(vtotal);
C(clock);
drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
#undef C
}
if (dvo->dev_ops->mode_fixup)
return dvo->dev_ops->mode_fixup(dvo, mode, adjusted_mode);
return true;
}
static void intel_dvo_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct drm_device *dev = encoder->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
struct intel_output *intel_output = enc_to_intel_output(encoder);
struct intel_dvo_device *dvo = intel_output->dev_priv;
int pipe = intel_crtc->pipe;
u32 dvo_val;
u32 dvo_reg = dvo->dvo_reg, dvo_srcdim_reg;
int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;
switch (dvo_reg) {
case DVOA:
default:
dvo_srcdim_reg = DVOA_SRCDIM;
break;
case DVOB:
dvo_srcdim_reg = DVOB_SRCDIM;
break;
case DVOC:
dvo_srcdim_reg = DVOC_SRCDIM;
break;
}
dvo->dev_ops->mode_set(dvo, mode, adjusted_mode);
/* Save the data order, since I don't know what it should be set to. */
dvo_val = I915_READ(dvo_reg) &
(DVO_PRESERVE_MASK | DVO_DATA_ORDER_GBRG);
dvo_val |= DVO_DATA_ORDER_FP | DVO_BORDER_ENABLE |
DVO_BLANK_ACTIVE_HIGH;
if (pipe == 1)
dvo_val |= DVO_PIPE_B_SELECT;
dvo_val |= DVO_PIPE_STALL;
if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
dvo_val |= DVO_HSYNC_ACTIVE_HIGH;
if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
dvo_val |= DVO_VSYNC_ACTIVE_HIGH;
I915_WRITE(dpll_reg, I915_READ(dpll_reg) | DPLL_DVO_HIGH_SPEED);
/*I915_WRITE(DVOB_SRCDIM,
(adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
(adjusted_mode->VDisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/
I915_WRITE(dvo_srcdim_reg,
(adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
(adjusted_mode->vdisplay << DVO_SRCDIM_VERTICAL_SHIFT));
/*I915_WRITE(DVOB, dvo_val);*/
I915_WRITE(dvo_reg, dvo_val);
}
/**
* Detect the output connection on our DVO device.
*
* Unimplemented.
*/
static enum drm_connector_status intel_dvo_detect(struct drm_connector *connector)
{
struct intel_output *intel_output = to_intel_output(connector);
struct intel_dvo_device *dvo = intel_output->dev_priv;
return dvo->dev_ops->detect(dvo);
}
static int intel_dvo_get_modes(struct drm_connector *connector)
{
struct intel_output *intel_output = to_intel_output(connector);
struct intel_dvo_device *dvo = intel_output->dev_priv;
/* We should probably have an i2c driver get_modes function for those
* devices which will have a fixed set of modes determined by the chip
* (TV-out, for example), but for now with just TMDS and LVDS,
* that's not the case.
*/
intel_ddc_get_modes(intel_output);
if (!list_empty(&connector->probed_modes))
return 1;
if (dvo->panel_fixed_mode != NULL) {
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, dvo->panel_fixed_mode);
if (mode) {
drm_mode_probed_add(connector, mode);
return 1;
}
}
return 0;
}
static void intel_dvo_destroy (struct drm_connector *connector)
{
struct intel_output *intel_output = to_intel_output(connector);
struct intel_dvo_device *dvo = intel_output->dev_priv;
if (dvo) {
if (dvo->dev_ops->destroy)
dvo->dev_ops->destroy(dvo);
if (dvo->panel_fixed_mode)
kfree(dvo->panel_fixed_mode);
/* no need, in i830_dvoices[] now */
//kfree(dvo);
}
if (intel_output->i2c_bus)
intel_i2c_destroy(intel_output->i2c_bus);
if (intel_output->ddc_bus)
intel_i2c_destroy(intel_output->ddc_bus);
drm_sysfs_connector_remove(connector);
drm_connector_cleanup(connector);
kfree(intel_output);
}
#ifdef RANDR_GET_CRTC_INTERFACE
static struct drm_crtc *intel_dvo_get_crtc(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_output *intel_output = to_intel_output(connector);
struct intel_dvo_device *dvo = intel_output->dev_priv;
int pipe = !!(I915_READ(dvo->dvo_reg) & SDVO_PIPE_B_SELECT);
return intel_pipe_to_crtc(pScrn, pipe);
}
#endif
static const struct drm_encoder_helper_funcs intel_dvo_helper_funcs = {
.dpms = intel_dvo_dpms,
.mode_fixup = intel_dvo_mode_fixup,
.prepare = intel_encoder_prepare,
.mode_set = intel_dvo_mode_set,
.commit = intel_encoder_commit,
};
static const struct drm_connector_funcs intel_dvo_connector_funcs = {
.dpms = drm_helper_connector_dpms,
.save = intel_dvo_save,
.restore = intel_dvo_restore,
.detect = intel_dvo_detect,
.destroy = intel_dvo_destroy,
.fill_modes = drm_helper_probe_single_connector_modes,
};
static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = {
.mode_valid = intel_dvo_mode_valid,
.get_modes = intel_dvo_get_modes,
.best_encoder = intel_best_encoder,
};
static void intel_dvo_enc_destroy(struct drm_encoder *encoder)
{
drm_encoder_cleanup(encoder);
}
static const struct drm_encoder_funcs intel_dvo_enc_funcs = {
.destroy = intel_dvo_enc_destroy,
};
/**
* Attempts to get a fixed panel timing for LVDS (currently only the i830).
*
* Other chips with DVO LVDS will need to extend this to deal with the LVDS
* chip being on DVOB/C and having multiple pipes.
*/
static struct drm_display_mode *
intel_dvo_get_current_mode (struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_output *intel_output = to_intel_output(connector);
struct intel_dvo_device *dvo = intel_output->dev_priv;
uint32_t dvo_reg = dvo->dvo_reg;
uint32_t dvo_val = I915_READ(dvo_reg);
struct drm_display_mode *mode = NULL;
/* If the DVO port is active, that'll be the LVDS, so we can pull out
* its timings to get how the BIOS set up the panel.
*/
if (dvo_val & DVO_ENABLE) {
struct drm_crtc *crtc;
int pipe = (dvo_val & DVO_PIPE_B_SELECT) ? 1 : 0;
crtc = intel_get_crtc_from_pipe(dev, pipe);
if (crtc) {
mode = intel_crtc_mode_get(dev, crtc);
if (mode) {
mode->type |= DRM_MODE_TYPE_PREFERRED;
if (dvo_val & DVO_HSYNC_ACTIVE_HIGH)
mode->flags |= DRM_MODE_FLAG_PHSYNC;
if (dvo_val & DVO_VSYNC_ACTIVE_HIGH)
mode->flags |= DRM_MODE_FLAG_PVSYNC;
}
}
}
return mode;
}
void intel_dvo_init(struct drm_device *dev)
{
struct intel_output *intel_output;
struct intel_dvo_device *dvo;
struct intel_i2c_chan *i2cbus = NULL;
int ret = 0;
int i;
int gpio_inited = 0;
int encoder_type = DRM_MODE_ENCODER_NONE;
intel_output = kzalloc (sizeof(struct intel_output), GFP_KERNEL);
if (!intel_output)
return;
/* Set up the DDC bus */
intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "DVODDC_D");
if (!intel_output->ddc_bus)
goto free_intel;
/* Now, try to find a controller */
for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
struct drm_connector *connector = &intel_output->base;
int gpio;
dvo = &intel_dvo_devices[i];
/* Allow the I2C driver info to specify the GPIO to be used in
* special cases, but otherwise default to what's defined
* in the spec.
*/
if (dvo->gpio != 0)
gpio = dvo->gpio;
else if (dvo->type == INTEL_DVO_CHIP_LVDS)
gpio = GPIOB;
else
gpio = GPIOE;
/* Set up the I2C bus necessary for the chip we're probing.
* It appears that everything is on GPIOE except for panels
* on i830 laptops, which are on GPIOB (DVOA).
*/
if (gpio_inited != gpio) {
if (i2cbus != NULL)
intel_i2c_destroy(i2cbus);
if (!(i2cbus = intel_i2c_create(dev, gpio,
gpio == GPIOB ? "DVOI2C_B" : "DVOI2C_E"))) {
continue;
}
gpio_inited = gpio;
}
if (dvo->dev_ops!= NULL)
ret = dvo->dev_ops->init(dvo, i2cbus);
else
ret = false;
if (!ret)
continue;
intel_output->type = INTEL_OUTPUT_DVO;
switch (dvo->type) {
case INTEL_DVO_CHIP_TMDS:
drm_connector_init(dev, connector,
&intel_dvo_connector_funcs,
DRM_MODE_CONNECTOR_DVII);
encoder_type = DRM_MODE_ENCODER_TMDS;
break;
case INTEL_DVO_CHIP_LVDS:
drm_connector_init(dev, connector,
&intel_dvo_connector_funcs,
DRM_MODE_CONNECTOR_LVDS);
encoder_type = DRM_MODE_ENCODER_LVDS;
break;
}
drm_connector_helper_add(connector,
&intel_dvo_connector_helper_funcs);
connector->display_info.subpixel_order = SubPixelHorizontalRGB;
connector->interlace_allowed = false;
connector->doublescan_allowed = false;
intel_output->dev_priv = dvo;
intel_output->i2c_bus = i2cbus;
drm_encoder_init(dev, &intel_output->enc,
&intel_dvo_enc_funcs, encoder_type);
drm_encoder_helper_add(&intel_output->enc,
&intel_dvo_helper_funcs);
drm_mode_connector_attach_encoder(&intel_output->base,
&intel_output->enc);
if (dvo->type == INTEL_DVO_CHIP_LVDS) {
/* For our LVDS chipsets, we should hopefully be able
* to dig the fixed panel mode out of the BIOS data.
* However, it's in a different format from the BIOS
* data on chipsets with integrated LVDS (stored in AIM
* headers, likely), so for now, just get the current
* mode being output through DVO.
*/
dvo->panel_fixed_mode =
intel_dvo_get_current_mode(connector);
dvo->panel_wants_dither = true;
}
drm_sysfs_connector_add(connector);
return;
}
intel_i2c_destroy(intel_output->ddc_bus);
/* Didn't find a chip, so tear down. */
if (i2cbus != NULL)
intel_i2c_destroy(i2cbus);
free_intel:
kfree(intel_output);
}
