| /* |
| * 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 "i915_drv.h" |
| #include "i915_reg.h" |
| #include "intel_connector.h" |
| #include "intel_de.h" |
| #include "intel_display_types.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 INTEL_DVO_CHIP_LVDS_NO_FIXED 5 |
| |
| #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_LVDS_NO_FIXED, |
| .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 intel_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); |
| u32 tmp; |
| |
| tmp = intel_de_read(dev_priv, 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 = intel_de_read(dev_priv, 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 = intel_de_read(dev_priv, 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->hw.adjusted_mode.flags |= flags; |
| |
| pipe_config->hw.adjusted_mode.crtc_clock = pipe_config->port_clock; |
| } |
| |
| static void intel_disable_dvo(struct intel_atomic_state *state, |
| 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 = intel_de_read(dev_priv, dvo_reg); |
| |
| intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false); |
| intel_de_write(dev_priv, dvo_reg, temp & ~DVO_ENABLE); |
| intel_de_read(dev_priv, dvo_reg); |
| } |
| |
| static void intel_enable_dvo(struct intel_atomic_state *state, |
| 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 = intel_de_read(dev_priv, dvo_reg); |
| |
| intel_dvo->dev.dev_ops->mode_set(&intel_dvo->dev, |
| &pipe_config->hw.mode, |
| &pipe_config->hw.adjusted_mode); |
| |
| intel_de_write(dev_priv, dvo_reg, temp | DVO_ENABLE); |
| intel_de_read(dev_priv, 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_connector *intel_connector = to_intel_connector(connector); |
| struct intel_dvo *intel_dvo = intel_attached_dvo(intel_connector); |
| const struct drm_display_mode *fixed_mode = |
| intel_panel_fixed_mode(intel_connector, 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) { |
| enum drm_mode_status status; |
| |
| status = intel_panel_mode_valid(intel_connector, mode); |
| if (status != MODE_OK) |
| return status; |
| |
| 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); |
| struct intel_connector *connector = to_intel_connector(conn_state->connector); |
| struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode; |
| const struct drm_display_mode *fixed_mode = |
| intel_panel_fixed_mode(intel_dvo->attached_connector, 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) { |
| int ret; |
| |
| ret = intel_panel_compute_config(connector, adjusted_mode); |
| if (ret) |
| return ret; |
| } |
| |
| 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_atomic_state *state, |
| 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->uapi.crtc); |
| const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode; |
| struct intel_dvo *intel_dvo = enc_to_dvo(encoder); |
| enum pipe 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 = intel_de_read(dev_priv, 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; |
| |
| intel_de_write(dev_priv, dvo_srcdim_reg, |
| (adjusted_mode->crtc_hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) | (adjusted_mode->crtc_vdisplay << DVO_SRCDIM_VERTICAL_SHIFT)); |
| intel_de_write(dev_priv, dvo_reg, dvo_val); |
| } |
| |
| static enum drm_connector_status |
| intel_dvo_detect(struct drm_connector *connector, bool force) |
| { |
| struct drm_i915_private *i915 = to_i915(connector->dev); |
| struct intel_dvo *intel_dvo = intel_attached_dvo(to_intel_connector(connector)); |
| |
| DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", |
| connector->base.id, connector->name); |
| |
| if (!INTEL_DISPLAY_ENABLED(i915)) |
| return connector_status_disconnected; |
| |
| 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); |
| int num_modes; |
| |
| /* |
| * 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. |
| */ |
| num_modes = intel_ddc_get_modes(connector, |
| intel_gmbus_get_adapter(dev_priv, GMBUS_PIN_DPC)); |
| if (num_modes) |
| return num_modes; |
| |
| return intel_panel_get_modes(to_intel_connector(connector)); |
| } |
| |
| 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, |
| }; |
| |
| 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] = intel_de_read(dev_priv, DPLL(pipe)); |
| intel_de_write(dev_priv, 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) { |
| intel_de_write(dev_priv, 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->pipe_mask = ~0; |
| |
| if (dvo->type != INTEL_DVO_CHIP_LVDS) |
| intel_encoder->cloneable = BIT(INTEL_OUTPUT_ANALOG) | |
| BIT(INTEL_OUTPUT_DVO); |
| |
| switch (dvo->type) { |
| case INTEL_DVO_CHIP_TMDS: |
| intel_connector->polled = DRM_CONNECTOR_POLL_CONNECT | |
| DRM_CONNECTOR_POLL_DISCONNECT; |
| 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_NO_FIXED: |
| case INTEL_DVO_CHIP_LVDS: |
| 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; |
| |
| 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_add_encoder_fixed_mode(intel_connector, |
| intel_encoder); |
| |
| intel_panel_init(intel_connector); |
| |
| intel_dvo->panel_wants_dither = true; |
| } |
| |
| return; |
| } |
| |
| kfree(intel_dvo); |
| kfree(intel_connector); |
| } |