diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dvo.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dvo.c | 555 |
1 files changed, 555 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dvo.c b/drivers/gpu/drm/i915/display/intel_dvo.c new file mode 100644 index 000000000000..22666d28f4aa --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_dvo.c @@ -0,0 +1,555 @@ +/* + * 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 <linux/slab.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc.h> +#include <drm/i915_drm.h> + +#include "i915_drv.h" +#include "intel_connector.h" +#include "intel_drv.h" +#include "intel_dvo.h" +#include "intel_dvo_dev.h" +#include "intel_gmbus.h" +#include "intel_panel.h" + +#define INTEL_DVO_CHIP_NONE 0 +#define INTEL_DVO_CHIP_LVDS 1 +#define INTEL_DVO_CHIP_TMDS 2 +#define INTEL_DVO_CHIP_TVOUT 4 + +#define SIL164_ADDR 0x38 +#define CH7xxx_ADDR 0x76 +#define TFP410_ADDR 0x38 +#define NS2501_ADDR 0x38 + +static const struct intel_dvo_device intel_dvo_devices[] = { + { + .type = INTEL_DVO_CHIP_TMDS, + .name = "sil164", + .dvo_reg = DVOC, + .dvo_srcdim_reg = DVOC_SRCDIM, + .slave_addr = SIL164_ADDR, + .dev_ops = &sil164_ops, + }, + { + .type = INTEL_DVO_CHIP_TMDS, + .name = "ch7xxx", + .dvo_reg = DVOC, + .dvo_srcdim_reg = DVOC_SRCDIM, + .slave_addr = CH7xxx_ADDR, + .dev_ops = &ch7xxx_ops, + }, + { + .type = INTEL_DVO_CHIP_TMDS, + .name = "ch7xxx", + .dvo_reg = DVOC, + .dvo_srcdim_reg = DVOC_SRCDIM, + .slave_addr = 0x75, /* For some ch7010 */ + .dev_ops = &ch7xxx_ops, + }, + { + .type = INTEL_DVO_CHIP_LVDS, + .name = "ivch", + .dvo_reg = DVOA, + .dvo_srcdim_reg = DVOA_SRCDIM, + .slave_addr = 0x02, /* Might also be 0x44, 0x84, 0xc4 */ + .dev_ops = &ivch_ops, + }, + { + .type = INTEL_DVO_CHIP_TMDS, + .name = "tfp410", + .dvo_reg = DVOC, + .dvo_srcdim_reg = DVOC_SRCDIM, + .slave_addr = TFP410_ADDR, + .dev_ops = &tfp410_ops, + }, + { + .type = INTEL_DVO_CHIP_LVDS, + .name = "ch7017", + .dvo_reg = DVOC, + .dvo_srcdim_reg = DVOC_SRCDIM, + .slave_addr = 0x75, + .gpio = GMBUS_PIN_DPB, + .dev_ops = &ch7017_ops, + }, + { + .type = INTEL_DVO_CHIP_TMDS, + .name = "ns2501", + .dvo_reg = DVOB, + .dvo_srcdim_reg = DVOB_SRCDIM, + .slave_addr = NS2501_ADDR, + .dev_ops = &ns2501_ops, + } +}; + +struct intel_dvo { + struct intel_encoder base; + + struct intel_dvo_device dev; + + struct intel_connector *attached_connector; + + bool panel_wants_dither; +}; + +static struct intel_dvo *enc_to_dvo(struct intel_encoder *encoder) +{ + return container_of(encoder, struct intel_dvo, base); +} + +static struct intel_dvo *intel_attached_dvo(struct drm_connector *connector) +{ + return enc_to_dvo(intel_attached_encoder(connector)); +} + +static bool intel_dvo_connector_get_hw_state(struct intel_connector *connector) +{ + struct drm_device *dev = connector->base.dev; + struct drm_i915_private *dev_priv = to_i915(dev); + struct intel_dvo *intel_dvo = intel_attached_dvo(&connector->base); + u32 tmp; + + tmp = I915_READ(intel_dvo->dev.dvo_reg); + + if (!(tmp & DVO_ENABLE)) + return false; + + return intel_dvo->dev.dev_ops->get_hw_state(&intel_dvo->dev); +} + +static bool intel_dvo_get_hw_state(struct intel_encoder *encoder, + enum pipe *pipe) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + struct intel_dvo *intel_dvo = enc_to_dvo(encoder); + u32 tmp; + + tmp = I915_READ(intel_dvo->dev.dvo_reg); + + *pipe = (tmp & DVO_PIPE_SEL_MASK) >> DVO_PIPE_SEL_SHIFT; + + return tmp & DVO_ENABLE; +} + +static void intel_dvo_get_config(struct intel_encoder *encoder, + struct intel_crtc_state *pipe_config) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + struct intel_dvo *intel_dvo = enc_to_dvo(encoder); + u32 tmp, flags = 0; + + pipe_config->output_types |= BIT(INTEL_OUTPUT_DVO); + + tmp = I915_READ(intel_dvo->dev.dvo_reg); + if (tmp & DVO_HSYNC_ACTIVE_HIGH) + flags |= DRM_MODE_FLAG_PHSYNC; + else + flags |= DRM_MODE_FLAG_NHSYNC; + if (tmp & DVO_VSYNC_ACTIVE_HIGH) + flags |= DRM_MODE_FLAG_PVSYNC; + else + flags |= DRM_MODE_FLAG_NVSYNC; + + pipe_config->base.adjusted_mode.flags |= flags; + + pipe_config->base.adjusted_mode.crtc_clock = pipe_config->port_clock; +} + +static void intel_disable_dvo(struct intel_encoder *encoder, + const struct intel_crtc_state *old_crtc_state, + const struct drm_connector_state *old_conn_state) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + struct intel_dvo *intel_dvo = enc_to_dvo(encoder); + i915_reg_t dvo_reg = intel_dvo->dev.dvo_reg; + u32 temp = I915_READ(dvo_reg); + + intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false); + I915_WRITE(dvo_reg, temp & ~DVO_ENABLE); + I915_READ(dvo_reg); +} + +static void intel_enable_dvo(struct intel_encoder *encoder, + const struct intel_crtc_state *pipe_config, + const struct drm_connector_state *conn_state) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + struct intel_dvo *intel_dvo = enc_to_dvo(encoder); + i915_reg_t dvo_reg = intel_dvo->dev.dvo_reg; + u32 temp = I915_READ(dvo_reg); + + intel_dvo->dev.dev_ops->mode_set(&intel_dvo->dev, + &pipe_config->base.mode, + &pipe_config->base.adjusted_mode); + + I915_WRITE(dvo_reg, temp | DVO_ENABLE); + I915_READ(dvo_reg); + + intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true); +} + +static enum drm_mode_status +intel_dvo_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + struct intel_dvo *intel_dvo = intel_attached_dvo(connector); + const struct drm_display_mode *fixed_mode = + to_intel_connector(connector)->panel.fixed_mode; + int max_dotclk = to_i915(connector->dev)->max_dotclk_freq; + int target_clock = mode->clock; + + if (mode->flags & DRM_MODE_FLAG_DBLSCAN) + return MODE_NO_DBLESCAN; + + /* XXX: Validate clock range */ + + if (fixed_mode) { + if (mode->hdisplay > fixed_mode->hdisplay) + return MODE_PANEL; + if (mode->vdisplay > fixed_mode->vdisplay) + return MODE_PANEL; + + target_clock = fixed_mode->clock; + } + + if (target_clock > max_dotclk) + return MODE_CLOCK_HIGH; + + return intel_dvo->dev.dev_ops->mode_valid(&intel_dvo->dev, mode); +} + +static int intel_dvo_compute_config(struct intel_encoder *encoder, + struct intel_crtc_state *pipe_config, + struct drm_connector_state *conn_state) +{ + struct intel_dvo *intel_dvo = enc_to_dvo(encoder); + const struct drm_display_mode *fixed_mode = + intel_dvo->attached_connector->panel.fixed_mode; + struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; + + /* + * 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 (fixed_mode) + intel_fixed_panel_mode(fixed_mode, adjusted_mode); + + if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) + return -EINVAL; + + pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; + + return 0; +} + +static void intel_dvo_pre_enable(struct intel_encoder *encoder, + const struct intel_crtc_state *pipe_config, + const struct drm_connector_state *conn_state) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc); + const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; + struct intel_dvo *intel_dvo = enc_to_dvo(encoder); + int pipe = crtc->pipe; + u32 dvo_val; + i915_reg_t dvo_reg = intel_dvo->dev.dvo_reg; + i915_reg_t dvo_srcdim_reg = intel_dvo->dev.dvo_srcdim_reg; + + /* 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; + + dvo_val |= DVO_PIPE_SEL(pipe); + 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(DVOB_SRCDIM, + (adjusted_mode->crtc_hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) | + (adjusted_mode->crtc_vdisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/ + I915_WRITE(dvo_srcdim_reg, + (adjusted_mode->crtc_hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) | + (adjusted_mode->crtc_vdisplay << DVO_SRCDIM_VERTICAL_SHIFT)); + /*I915_WRITE(DVOB, dvo_val);*/ + I915_WRITE(dvo_reg, dvo_val); +} + +static enum drm_connector_status +intel_dvo_detect(struct drm_connector *connector, bool force) +{ + struct intel_dvo *intel_dvo = intel_attached_dvo(connector); + DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", + connector->base.id, connector->name); + return intel_dvo->dev.dev_ops->detect(&intel_dvo->dev); +} + +static int intel_dvo_get_modes(struct drm_connector *connector) +{ + struct drm_i915_private *dev_priv = to_i915(connector->dev); + const struct drm_display_mode *fixed_mode = + to_intel_connector(connector)->panel.fixed_mode; + + /* + * 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(connector, + intel_gmbus_get_adapter(dev_priv, GMBUS_PIN_DPC)); + if (!list_empty(&connector->probed_modes)) + return 1; + + if (fixed_mode) { + struct drm_display_mode *mode; + mode = drm_mode_duplicate(connector->dev, fixed_mode); + if (mode) { + drm_mode_probed_add(connector, mode); + return 1; + } + } + + return 0; +} + +static const struct drm_connector_funcs intel_dvo_connector_funcs = { + .detect = intel_dvo_detect, + .late_register = intel_connector_register, + .early_unregister = intel_connector_unregister, + .destroy = intel_connector_destroy, + .fill_modes = drm_helper_probe_single_connector_modes, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, +}; + +static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = { + .mode_valid = intel_dvo_mode_valid, + .get_modes = intel_dvo_get_modes, +}; + +static void intel_dvo_enc_destroy(struct drm_encoder *encoder) +{ + struct intel_dvo *intel_dvo = enc_to_dvo(to_intel_encoder(encoder)); + + if (intel_dvo->dev.dev_ops->destroy) + intel_dvo->dev.dev_ops->destroy(&intel_dvo->dev); + + intel_encoder_destroy(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 intel_encoder *encoder) +{ + struct drm_display_mode *mode; + + mode = intel_encoder_current_mode(encoder); + if (mode) { + DRM_DEBUG_KMS("using current (BIOS) mode: "); + drm_mode_debug_printmodeline(mode); + mode->type |= DRM_MODE_TYPE_PREFERRED; + } + + return mode; +} + +static enum port intel_dvo_port(i915_reg_t dvo_reg) +{ + if (i915_mmio_reg_equal(dvo_reg, DVOA)) + return PORT_A; + else if (i915_mmio_reg_equal(dvo_reg, DVOB)) + return PORT_B; + else + return PORT_C; +} + +void intel_dvo_init(struct drm_i915_private *dev_priv) +{ + struct intel_encoder *intel_encoder; + struct intel_dvo *intel_dvo; + struct intel_connector *intel_connector; + int i; + int encoder_type = DRM_MODE_ENCODER_NONE; + + intel_dvo = kzalloc(sizeof(*intel_dvo), GFP_KERNEL); + if (!intel_dvo) + return; + + intel_connector = intel_connector_alloc(); + if (!intel_connector) { + kfree(intel_dvo); + return; + } + + intel_dvo->attached_connector = intel_connector; + + intel_encoder = &intel_dvo->base; + + intel_encoder->disable = intel_disable_dvo; + intel_encoder->enable = intel_enable_dvo; + intel_encoder->get_hw_state = intel_dvo_get_hw_state; + intel_encoder->get_config = intel_dvo_get_config; + intel_encoder->compute_config = intel_dvo_compute_config; + intel_encoder->pre_enable = intel_dvo_pre_enable; + intel_connector->get_hw_state = intel_dvo_connector_get_hw_state; + + /* Now, try to find a controller */ + for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) { + struct drm_connector *connector = &intel_connector->base; + const struct intel_dvo_device *dvo = &intel_dvo_devices[i]; + struct i2c_adapter *i2c; + int gpio; + bool dvoinit; + enum pipe pipe; + u32 dpll[I915_MAX_PIPES]; + enum port port; + + /* + * 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 (intel_gmbus_is_valid_pin(dev_priv, dvo->gpio)) + gpio = dvo->gpio; + else if (dvo->type == INTEL_DVO_CHIP_LVDS) + gpio = GMBUS_PIN_SSC; + else + gpio = GMBUS_PIN_DPB; + + /* + * 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). + */ + i2c = intel_gmbus_get_adapter(dev_priv, gpio); + + intel_dvo->dev = *dvo; + + /* + * GMBUS NAK handling seems to be unstable, hence let the + * transmitter detection run in bit banging mode for now. + */ + intel_gmbus_force_bit(i2c, true); + + /* + * ns2501 requires the DVO 2x clock before it will + * respond to i2c accesses, so make sure we have + * have the clock enabled before we attempt to + * initialize the device. + */ + for_each_pipe(dev_priv, pipe) { + dpll[pipe] = I915_READ(DPLL(pipe)); + I915_WRITE(DPLL(pipe), dpll[pipe] | DPLL_DVO_2X_MODE); + } + + dvoinit = dvo->dev_ops->init(&intel_dvo->dev, i2c); + + /* restore the DVO 2x clock state to original */ + for_each_pipe(dev_priv, pipe) { + I915_WRITE(DPLL(pipe), dpll[pipe]); + } + + intel_gmbus_force_bit(i2c, false); + + if (!dvoinit) + continue; + + port = intel_dvo_port(dvo->dvo_reg); + drm_encoder_init(&dev_priv->drm, &intel_encoder->base, + &intel_dvo_enc_funcs, encoder_type, + "DVO %c", port_name(port)); + + intel_encoder->type = INTEL_OUTPUT_DVO; + intel_encoder->power_domain = POWER_DOMAIN_PORT_OTHER; + intel_encoder->port = port; + intel_encoder->crtc_mask = (1 << 0) | (1 << 1); + + switch (dvo->type) { + case INTEL_DVO_CHIP_TMDS: + intel_encoder->cloneable = (1 << INTEL_OUTPUT_ANALOG) | + (1 << INTEL_OUTPUT_DVO); + drm_connector_init(&dev_priv->drm, connector, + &intel_dvo_connector_funcs, + DRM_MODE_CONNECTOR_DVII); + encoder_type = DRM_MODE_ENCODER_TMDS; + break; + case INTEL_DVO_CHIP_LVDS: + intel_encoder->cloneable = 0; + drm_connector_init(&dev_priv->drm, 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_connector_attach_encoder(intel_connector, intel_encoder); + 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. + */ + intel_panel_init(&intel_connector->panel, + intel_dvo_get_current_mode(intel_encoder), + NULL); + intel_dvo->panel_wants_dither = true; + } + + return; + } + + kfree(intel_dvo); + kfree(intel_connector); +} |