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-rw-r--r--linux-core/intel_crt.c248
1 files changed, 248 insertions, 0 deletions
diff --git a/linux-core/intel_crt.c b/linux-core/intel_crt.c
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+/*
+ * 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)
+{
+ drm_device_t *dev = output->dev;
+ drm_i915_private_t *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)
+{
+ drm_device_t *dev = output->dev;
+ struct drm_crtc *crtc = output->crtc;
+ struct intel_crtc *intel_crtc = crtc->driver_private;
+ drm_i915_private_t *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)
+{
+ drm_device_t *dev = output->dev;
+ drm_i915_private_t *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)
+{
+ drm_device_t *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(drm_device_t *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;
+}