diff options
Diffstat (limited to 'linux-core/intel_crt.c')
| -rw-r--r-- | linux-core/intel_crt.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/linux-core/intel_crt.c b/linux-core/intel_crt.c new file mode 100644 index 00000000..d2e1f95c --- /dev/null +++ b/linux-core/intel_crt.c @@ -0,0 +1,248 @@ +/* + * 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" + +static void intel_crt_dpms(struct drm_output *output, int mode) +{ + struct drm_device *dev = output->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + u32 temp; + + temp = I915_READ(ADPA); + temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE); + temp &= ~ADPA_DAC_ENABLE; + + switch(mode) { + case DPMSModeOn: + temp |= ADPA_DAC_ENABLE; + break; + case DPMSModeStandby: + temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE; + break; + case DPMSModeSuspend: + temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE; + break; + case DPMSModeOff: + temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE; + break; + } + + I915_WRITE(ADPA, temp); +} + +static void intel_crt_save(struct drm_output *output) +{ + +} + +static void intel_crt_restore(struct drm_output *output) +{ + +} + +static int intel_crt_mode_valid(struct drm_output *output, + struct drm_display_mode *mode) +{ + if (mode->flags & V_DBLSCAN) + return MODE_NO_DBLESCAN; + + if (mode->clock > 400000 || mode->clock < 25000) + return MODE_CLOCK_RANGE; + + return MODE_OK; +} + +static bool intel_crt_mode_fixup(struct drm_output *output, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + return true; +} + +static void intel_crt_mode_set(struct drm_output *output, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + struct drm_device *dev = output->dev; + struct drm_crtc *crtc = output->crtc; + struct intel_crtc *intel_crtc = crtc->driver_private; + struct drm_i915_private *dev_priv = dev->dev_private; + int dpll_md_reg; + u32 adpa, dpll_md; + + if (intel_crtc->pipe == 0) + dpll_md_reg = DPLL_A_MD; + else + dpll_md_reg = DPLL_B_MD; + + /* + * Disable separate mode multiplier used when cloning SDVO to CRT + * XXX this needs to be adjusted when we really are cloning + */ + if (IS_I965G(dev)) { + dpll_md = I915_READ(dpll_md_reg); + I915_WRITE(dpll_md_reg, + dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK); + } + + adpa = 0; + if (adjusted_mode->flags & V_PHSYNC) + adpa |= ADPA_HSYNC_ACTIVE_HIGH; + if (adjusted_mode->flags & V_PVSYNC) + adpa |= ADPA_VSYNC_ACTIVE_HIGH; + + if (intel_crtc->pipe == 0) + adpa |= ADPA_PIPE_A_SELECT; + else + adpa |= ADPA_PIPE_B_SELECT; + + I915_WRITE(ADPA, adpa); +} + +/** + * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence. + * + * Only for I945G/GM. + * + * \return TRUE if CRT is connected. + * \return FALSE if CRT is disconnected. + */ +static bool intel_crt_detect_hotplug(struct drm_output *output) +{ + struct drm_device *dev = output->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + u32 temp; + unsigned long timeout = jiffies + msecs_to_jiffies(1000); + + temp = I915_READ(PORT_HOTPLUG_EN); + + I915_WRITE(PORT_HOTPLUG_EN, + temp | CRT_HOTPLUG_FORCE_DETECT | (1 << 5)); + + do { + if (!(I915_READ(PORT_HOTPLUG_EN) & CRT_HOTPLUG_FORCE_DETECT)) + break; + msleep(1); + } while (time_after(timeout, jiffies)); + + if ((I915_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) == + CRT_HOTPLUG_MONITOR_COLOR) + return true; + + return false; +} + +static bool intel_crt_detect_ddc(struct drm_output *output) +{ + struct intel_output *intel_output = output->driver_private; + + /* CRT should always be at 0, but check anyway */ + if (intel_output->type != INTEL_OUTPUT_ANALOG) + return false; + + return intel_ddc_probe(output); +} + +static enum drm_output_status intel_crt_detect(struct drm_output *output) +{ + struct drm_device *dev = output->dev; + + if (IS_I945G(dev)| IS_I945GM(dev) || IS_I965G(dev)) { + if (intel_crt_detect_hotplug(output)) + return output_status_connected; + else + return output_status_disconnected; + } + + if (intel_crt_detect_ddc(output)) + return output_status_connected; + + /* TODO use load detect */ + return output_status_unknown; +} + +static void intel_crt_destroy(struct drm_output *output) +{ + struct intel_output *intel_output = output->driver_private; + + intel_i2c_destroy(intel_output->ddc_bus); + kfree(output->driver_private); +} + +static int intel_crt_get_modes(struct drm_output *output) +{ + return intel_ddc_get_modes(output); +} + +/* + * Routines for controlling stuff on the analog port + */ +static const struct drm_output_funcs intel_crt_output_funcs = { + .dpms = intel_crt_dpms, + .save = intel_crt_save, + .restore = intel_crt_restore, + .mode_valid = intel_crt_mode_valid, + .mode_fixup = intel_crt_mode_fixup, + .prepare = intel_output_prepare, + .mode_set = intel_crt_mode_set, + .commit = intel_output_commit, + .detect = intel_crt_detect, + .get_modes = intel_crt_get_modes, + .cleanup = intel_crt_destroy, +}; + +void intel_crt_init(struct drm_device *dev) +{ + struct drm_output *output; + struct intel_output *intel_output; + + output = drm_output_create(dev, &intel_crt_output_funcs, "VGA"); + + intel_output = kmalloc(sizeof(struct intel_output), GFP_KERNEL); + if (!intel_output) { + drm_output_destroy(output); + return; + } + /* Set up the DDC bus. */ + intel_output->ddc_bus = intel_i2c_create(dev, GPIOA, "CRTDDC_A"); + if (!intel_output->ddc_bus) { + dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration " + "failed.\n"); + return; + } + + intel_output->type = INTEL_OUTPUT_ANALOG; + output->driver_private = intel_output; + output->interlace_allowed = 0; + output->doublescan_allowed = 0; +} |