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path: root/drivers/gpu/drm/gma500/intel_bios.c
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Diffstat (limited to 'drivers/gpu/drm/gma500/intel_bios.c')
-rw-r--r--drivers/gpu/drm/gma500/intel_bios.c597
1 files changed, 597 insertions, 0 deletions
diff --git a/drivers/gpu/drm/gma500/intel_bios.c b/drivers/gpu/drm/gma500/intel_bios.c
new file mode 100644
index 00000000000..d3497348c4d
--- /dev/null
+++ b/drivers/gpu/drm/gma500/intel_bios.c
@@ -0,0 +1,597 @@
+/*
+ * Copyright (c) 2006 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Authors:
+ * Eric Anholt <eric@anholt.net>
+ *
+ */
+#include <drm/drmP.h>
+#include <drm/drm.h>
+#include <drm/gma_drm.h>
+#include "psb_drv.h"
+#include "psb_intel_drv.h"
+#include "psb_intel_reg.h"
+#include "intel_bios.h"
+
+#define SLAVE_ADDR1 0x70
+#define SLAVE_ADDR2 0x72
+
+static void *find_section(struct bdb_header *bdb, int section_id)
+{
+ u8 *base = (u8 *)bdb;
+ int index = 0;
+ u16 total, current_size;
+ u8 current_id;
+
+ /* skip to first section */
+ index += bdb->header_size;
+ total = bdb->bdb_size;
+
+ /* walk the sections looking for section_id */
+ while (index < total) {
+ current_id = *(base + index);
+ index++;
+ current_size = *((u16 *)(base + index));
+ index += 2;
+ if (current_id == section_id)
+ return base + index;
+ index += current_size;
+ }
+
+ return NULL;
+}
+
+static void
+parse_edp(struct drm_psb_private *dev_priv, struct bdb_header *bdb)
+{
+ struct bdb_edp *edp;
+ struct edp_power_seq *edp_pps;
+ struct edp_link_params *edp_link_params;
+ uint8_t panel_type;
+
+ edp = find_section(bdb, BDB_EDP);
+
+ dev_priv->edp.bpp = 18;
+ if (!edp) {
+ if (dev_priv->edp.support) {
+ DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported, assume %dbpp panel color depth.\n",
+ dev_priv->edp.bpp);
+ }
+ return;
+ }
+
+ panel_type = dev_priv->panel_type;
+ switch ((edp->color_depth >> (panel_type * 2)) & 3) {
+ case EDP_18BPP:
+ dev_priv->edp.bpp = 18;
+ break;
+ case EDP_24BPP:
+ dev_priv->edp.bpp = 24;
+ break;
+ case EDP_30BPP:
+ dev_priv->edp.bpp = 30;
+ break;
+ }
+
+ /* Get the eDP sequencing and link info */
+ edp_pps = &edp->power_seqs[panel_type];
+ edp_link_params = &edp->link_params[panel_type];
+
+ dev_priv->edp.pps = *edp_pps;
+
+ DRM_DEBUG_KMS("EDP timing in vbt t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
+ dev_priv->edp.pps.t1_t3, dev_priv->edp.pps.t8,
+ dev_priv->edp.pps.t9, dev_priv->edp.pps.t10,
+ dev_priv->edp.pps.t11_t12);
+
+ dev_priv->edp.rate = edp_link_params->rate ? DP_LINK_BW_2_7 :
+ DP_LINK_BW_1_62;
+ switch (edp_link_params->lanes) {
+ case 0:
+ dev_priv->edp.lanes = 1;
+ break;
+ case 1:
+ dev_priv->edp.lanes = 2;
+ break;
+ case 3:
+ default:
+ dev_priv->edp.lanes = 4;
+ break;
+ }
+ DRM_DEBUG_KMS("VBT reports EDP: Lane_count %d, Lane_rate %d, Bpp %d\n",
+ dev_priv->edp.lanes, dev_priv->edp.rate, dev_priv->edp.bpp);
+
+ switch (edp_link_params->preemphasis) {
+ case 0:
+ dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_0;
+ break;
+ case 1:
+ dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5;
+ break;
+ case 2:
+ dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_6;
+ break;
+ case 3:
+ dev_priv->edp.preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5;
+ break;
+ }
+ switch (edp_link_params->vswing) {
+ case 0:
+ dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_400;
+ break;
+ case 1:
+ dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_600;
+ break;
+ case 2:
+ dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_800;
+ break;
+ case 3:
+ dev_priv->edp.vswing = DP_TRAIN_VOLTAGE_SWING_1200;
+ break;
+ }
+ DRM_DEBUG_KMS("VBT reports EDP: VSwing %d, Preemph %d\n",
+ dev_priv->edp.vswing, dev_priv->edp.preemphasis);
+}
+
+static u16
+get_blocksize(void *p)
+{
+ u16 *block_ptr, block_size;
+
+ block_ptr = (u16 *)((char *)p - 2);
+ block_size = *block_ptr;
+ return block_size;
+}
+
+static void fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
+ struct lvds_dvo_timing *dvo_timing)
+{
+ panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
+ dvo_timing->hactive_lo;
+ panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
+ ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
+ panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
+ dvo_timing->hsync_pulse_width;
+ panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
+ ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
+
+ panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
+ dvo_timing->vactive_lo;
+ panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
+ dvo_timing->vsync_off;
+ panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
+ dvo_timing->vsync_pulse_width;
+ panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
+ ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
+ panel_fixed_mode->clock = dvo_timing->clock * 10;
+ panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
+
+ if (dvo_timing->hsync_positive)
+ panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
+ else
+ panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
+
+ if (dvo_timing->vsync_positive)
+ panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
+ else
+ panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
+
+ /* Some VBTs have bogus h/vtotal values */
+ if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
+ panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
+ if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
+ panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
+
+ drm_mode_set_name(panel_fixed_mode);
+}
+
+static void parse_backlight_data(struct drm_psb_private *dev_priv,
+ struct bdb_header *bdb)
+{
+ struct bdb_lvds_backlight *vbt_lvds_bl = NULL;
+ struct bdb_lvds_backlight *lvds_bl;
+ u8 p_type = 0;
+ void *bl_start = NULL;
+ struct bdb_lvds_options *lvds_opts
+ = find_section(bdb, BDB_LVDS_OPTIONS);
+
+ dev_priv->lvds_bl = NULL;
+
+ if (lvds_opts)
+ p_type = lvds_opts->panel_type;
+ else
+ return;
+
+ bl_start = find_section(bdb, BDB_LVDS_BACKLIGHT);
+ vbt_lvds_bl = (struct bdb_lvds_backlight *)(bl_start + 1) + p_type;
+
+ lvds_bl = kmemdup(vbt_lvds_bl, sizeof(*vbt_lvds_bl), GFP_KERNEL);
+ if (!lvds_bl) {
+ dev_err(dev_priv->dev->dev, "out of memory for backlight data\n");
+ return;
+ }
+ dev_priv->lvds_bl = lvds_bl;
+}
+
+/* Try to find integrated panel data */
+static void parse_lfp_panel_data(struct drm_psb_private *dev_priv,
+ struct bdb_header *bdb)
+{
+ struct bdb_lvds_options *lvds_options;
+ struct bdb_lvds_lfp_data *lvds_lfp_data;
+ struct bdb_lvds_lfp_data_entry *entry;
+ struct lvds_dvo_timing *dvo_timing;
+ struct drm_display_mode *panel_fixed_mode;
+
+ /* Defaults if we can't find VBT info */
+ dev_priv->lvds_dither = 0;
+ dev_priv->lvds_vbt = 0;
+
+ lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
+ if (!lvds_options)
+ return;
+
+ dev_priv->lvds_dither = lvds_options->pixel_dither;
+ dev_priv->panel_type = lvds_options->panel_type;
+
+ if (lvds_options->panel_type == 0xff)
+ return;
+
+ lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
+ if (!lvds_lfp_data)
+ return;
+
+
+ entry = &lvds_lfp_data->data[lvds_options->panel_type];
+ dvo_timing = &entry->dvo_timing;
+
+ panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode),
+ GFP_KERNEL);
+ if (panel_fixed_mode == NULL) {
+ dev_err(dev_priv->dev->dev, "out of memory for fixed panel mode\n");
+ return;
+ }
+
+ dev_priv->lvds_vbt = 1;
+ fill_detail_timing_data(panel_fixed_mode, dvo_timing);
+
+ if (panel_fixed_mode->htotal > 0 && panel_fixed_mode->vtotal > 0) {
+ dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode;
+ drm_mode_debug_printmodeline(panel_fixed_mode);
+ } else {
+ dev_dbg(dev_priv->dev->dev, "ignoring invalid LVDS VBT\n");
+ dev_priv->lvds_vbt = 0;
+ kfree(panel_fixed_mode);
+ }
+ return;
+}
+
+/* Try to find sdvo panel data */
+static void parse_sdvo_panel_data(struct drm_psb_private *dev_priv,
+ struct bdb_header *bdb)
+{
+ struct bdb_sdvo_lvds_options *sdvo_lvds_options;
+ struct lvds_dvo_timing *dvo_timing;
+ struct drm_display_mode *panel_fixed_mode;
+
+ dev_priv->sdvo_lvds_vbt_mode = NULL;
+
+ sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
+ if (!sdvo_lvds_options)
+ return;
+
+ dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
+ if (!dvo_timing)
+ return;
+
+ panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
+
+ if (!panel_fixed_mode)
+ return;
+
+ fill_detail_timing_data(panel_fixed_mode,
+ dvo_timing + sdvo_lvds_options->panel_type);
+
+ dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode;
+
+ return;
+}
+
+static void parse_general_features(struct drm_psb_private *dev_priv,
+ struct bdb_header *bdb)
+{
+ struct bdb_general_features *general;
+
+ /* Set sensible defaults in case we can't find the general block */
+ dev_priv->int_tv_support = 1;
+ dev_priv->int_crt_support = 1;
+
+ general = find_section(bdb, BDB_GENERAL_FEATURES);
+ if (general) {
+ dev_priv->int_tv_support = general->int_tv_support;
+ dev_priv->int_crt_support = general->int_crt_support;
+ dev_priv->lvds_use_ssc = general->enable_ssc;
+
+ if (dev_priv->lvds_use_ssc) {
+ dev_priv->lvds_ssc_freq
+ = general->ssc_freq ? 100 : 96;
+ }
+ }
+}
+
+static void
+parse_sdvo_device_mapping(struct drm_psb_private *dev_priv,
+ struct bdb_header *bdb)
+{
+ struct sdvo_device_mapping *p_mapping;
+ struct bdb_general_definitions *p_defs;
+ struct child_device_config *p_child;
+ int i, child_device_num, count;
+ u16 block_size;
+
+ p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
+ if (!p_defs) {
+ DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
+ return;
+ }
+ /* judge whether the size of child device meets the requirements.
+ * If the child device size obtained from general definition block
+ * is different with sizeof(struct child_device_config), skip the
+ * parsing of sdvo device info
+ */
+ if (p_defs->child_dev_size != sizeof(*p_child)) {
+ /* different child dev size . Ignore it */
+ DRM_DEBUG_KMS("different child size is found. Invalid.\n");
+ return;
+ }
+ /* get the block size of general definitions */
+ block_size = get_blocksize(p_defs);
+ /* get the number of child device */
+ child_device_num = (block_size - sizeof(*p_defs)) /
+ sizeof(*p_child);
+ count = 0;
+ for (i = 0; i < child_device_num; i++) {
+ p_child = &(p_defs->devices[i]);
+ if (!p_child->device_type) {
+ /* skip the device block if device type is invalid */
+ continue;
+ }
+ if (p_child->slave_addr != SLAVE_ADDR1 &&
+ p_child->slave_addr != SLAVE_ADDR2) {
+ /*
+ * If the slave address is neither 0x70 nor 0x72,
+ * it is not a SDVO device. Skip it.
+ */
+ continue;
+ }
+ if (p_child->dvo_port != DEVICE_PORT_DVOB &&
+ p_child->dvo_port != DEVICE_PORT_DVOC) {
+ /* skip the incorrect SDVO port */
+ DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
+ continue;
+ }
+ DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
+ " %s port\n",
+ p_child->slave_addr,
+ (p_child->dvo_port == DEVICE_PORT_DVOB) ?
+ "SDVOB" : "SDVOC");
+ p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]);
+ if (!p_mapping->initialized) {
+ p_mapping->dvo_port = p_child->dvo_port;
+ p_mapping->slave_addr = p_child->slave_addr;
+ p_mapping->dvo_wiring = p_child->dvo_wiring;
+ p_mapping->ddc_pin = p_child->ddc_pin;
+ p_mapping->i2c_pin = p_child->i2c_pin;
+ p_mapping->initialized = 1;
+ DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
+ p_mapping->dvo_port,
+ p_mapping->slave_addr,
+ p_mapping->dvo_wiring,
+ p_mapping->ddc_pin,
+ p_mapping->i2c_pin);
+ } else {
+ DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
+ "two SDVO device.\n");
+ }
+ if (p_child->slave2_addr) {
+ /* Maybe this is a SDVO device with multiple inputs */
+ /* And the mapping info is not added */
+ DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
+ " is a SDVO device with multiple inputs.\n");
+ }
+ count++;
+ }
+
+ if (!count) {
+ /* No SDVO device info is found */
+ DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
+ }
+ return;
+}
+
+
+static void
+parse_driver_features(struct drm_psb_private *dev_priv,
+ struct bdb_header *bdb)
+{
+ struct bdb_driver_features *driver;
+
+ driver = find_section(bdb, BDB_DRIVER_FEATURES);
+ if (!driver)
+ return;
+
+ if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
+ dev_priv->edp.support = 1;
+
+ /* This bit means to use 96Mhz for DPLL_A or not */
+ if (driver->primary_lfp_id)
+ dev_priv->dplla_96mhz = true;
+ else
+ dev_priv->dplla_96mhz = false;
+}
+
+static void
+parse_device_mapping(struct drm_psb_private *dev_priv,
+ struct bdb_header *bdb)
+{
+ struct bdb_general_definitions *p_defs;
+ struct child_device_config *p_child, *child_dev_ptr;
+ int i, child_device_num, count;
+ u16 block_size;
+
+ p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
+ if (!p_defs) {
+ DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
+ return;
+ }
+ /* judge whether the size of child device meets the requirements.
+ * If the child device size obtained from general definition block
+ * is different with sizeof(struct child_device_config), skip the
+ * parsing of sdvo device info
+ */
+ if (p_defs->child_dev_size != sizeof(*p_child)) {
+ /* different child dev size . Ignore it */
+ DRM_DEBUG_KMS("different child size is found. Invalid.\n");
+ return;
+ }
+ /* get the block size of general definitions */
+ block_size = get_blocksize(p_defs);
+ /* get the number of child device */
+ child_device_num = (block_size - sizeof(*p_defs)) /
+ sizeof(*p_child);
+ count = 0;
+ /* get the number of child devices that are present */
+ for (i = 0; i < child_device_num; i++) {
+ p_child = &(p_defs->devices[i]);
+ if (!p_child->device_type) {
+ /* skip the device block if device type is invalid */
+ continue;
+ }
+ count++;
+ }
+ if (!count) {
+ DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
+ return;
+ }
+ dev_priv->child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
+ if (!dev_priv->child_dev) {
+ DRM_DEBUG_KMS("No memory space for child devices\n");
+ return;
+ }
+
+ dev_priv->child_dev_num = count;
+ count = 0;
+ for (i = 0; i < child_device_num; i++) {
+ p_child = &(p_defs->devices[i]);
+ if (!p_child->device_type) {
+ /* skip the device block if device type is invalid */
+ continue;
+ }
+ child_dev_ptr = dev_priv->child_dev + count;
+ count++;
+ memcpy((void *)child_dev_ptr, (void *)p_child,
+ sizeof(*p_child));
+ }
+ return;
+}
+
+
+/**
+ * psb_intel_init_bios - initialize VBIOS settings & find VBT
+ * @dev: DRM device
+ *
+ * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
+ * to appropriate values.
+ *
+ * VBT existence is a sanity check that is relied on by other i830_bios.c code.
+ * Note that it would be better to use a BIOS call to get the VBT, as BIOSes may
+ * feed an updated VBT back through that, compared to what we'll fetch using
+ * this method of groping around in the BIOS data.
+ *
+ * Returns 0 on success, nonzero on failure.
+ */
+int psb_intel_init_bios(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ struct pci_dev *pdev = dev->pdev;
+ struct vbt_header *vbt = NULL;
+ struct bdb_header *bdb = NULL;
+ u8 __iomem *bios = NULL;
+ size_t size;
+ int i;
+
+
+ dev_priv->panel_type = 0xff;
+
+ /* XXX Should this validation be moved to intel_opregion.c? */
+ if (dev_priv->opregion.vbt) {
+ struct vbt_header *vbt = dev_priv->opregion.vbt;
+ if (memcmp(vbt->signature, "$VBT", 4) == 0) {
+ DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n",
+ vbt->signature);
+ bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset);
+ } else
+ dev_priv->opregion.vbt = NULL;
+ }
+
+ if (bdb == NULL) {
+ bios = pci_map_rom(pdev, &size);
+ if (!bios)
+ return -1;
+
+ /* Scour memory looking for the VBT signature */
+ for (i = 0; i + 4 < size; i++) {
+ if (!memcmp(bios + i, "$VBT", 4)) {
+ vbt = (struct vbt_header *)(bios + i);
+ break;
+ }
+ }
+
+ if (!vbt) {
+ dev_err(dev->dev, "VBT signature missing\n");
+ pci_unmap_rom(pdev, bios);
+ return -1;
+ }
+ bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset);
+ }
+
+ /* Grab useful general dxefinitions */
+ parse_general_features(dev_priv, bdb);
+ parse_driver_features(dev_priv, bdb);
+ parse_lfp_panel_data(dev_priv, bdb);
+ parse_sdvo_panel_data(dev_priv, bdb);
+ parse_sdvo_device_mapping(dev_priv, bdb);
+ parse_device_mapping(dev_priv, bdb);
+ parse_backlight_data(dev_priv, bdb);
+ parse_edp(dev_priv, bdb);
+
+ if (bios)
+ pci_unmap_rom(pdev, bios);
+
+ return 0;
+}
+
+/**
+ * Destroy and free VBT data
+ */
+void psb_intel_destroy_bios(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+
+ kfree(dev_priv->sdvo_lvds_vbt_mode);
+ kfree(dev_priv->lfp_lvds_vbt_mode);
+ kfree(dev_priv->lvds_bl);
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 12:59:46 +0000