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-rw-r--r--linux-core/Makefile.kernel2
-rw-r--r--linux-core/intel_bios.c244
-rw-r--r--linux-core/intel_bios.h187
-rw-r--r--shared-core/i915_drv.h6
-rw-r--r--shared-core/i915_init.c7
5 files changed, 445 insertions, 1 deletions
diff --git a/linux-core/Makefile.kernel b/linux-core/Makefile.kernel
index 6480d51a..f77f8642 100644
--- a/linux-core/Makefile.kernel
+++ b/linux-core/Makefile.kernel
@@ -22,7 +22,7 @@ mga-objs := mga_drv.o mga_dma.o mga_state.o mga_warp.o mga_irq.o
i810-objs := i810_drv.o i810_dma.o
i915-objs := i915_drv.o i915_dma.o i915_irq.o i915_mem.o i915_fence.o \
i915_buffer.o i915_execbuf.o \
- intel_display.o intel_crt.o intel_lvds.o \
+ intel_display.o intel_crt.o intel_lvds.o intel_bios.o \
intel_sdvo.o intel_modes.o intel_i2c.o i915_init.o intel_fb.o \
intel_tv.o i915_compat.o intel_dvo.o dvo_ch7xxx.o \
dvo_ch7017.o dvo_ivch.o dvo_tfp410.o dvo_sil164.o
diff --git a/linux-core/intel_bios.c b/linux-core/intel_bios.c
new file mode 100644
index 00000000..7f8e8513
--- /dev/null
+++ b/linux-core/intel_bios.c
@@ -0,0 +1,244 @@
+/*
+ * Copyright © 2006 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 "drmP.h"
+#include "drm.h"
+#include "i915_drm.h"
+#include "i915_drv.h"
+#include "intel_bios.h"
+
+#define VBT_OFFSET 0x1a
+
+/**
+ * intel_find_vbt - find the VBT
+ * @dev: DRM device
+ *
+ * Loads the Video BIOS and checks that the VBT exists.
+ *
+ * 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.
+ */
+bool
+intel_find_bios(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct pci_dev *pdev = dev->pdev;
+ void __iomem *bios;
+ size_t size;
+
+ bios = pci_map_rom(pdev, &size);
+ if (!bios)
+ return NULL;
+
+ dev_priv->vbt = (struct vbt_header *)((u8 *)bios + VBT_OFFSET);
+ dev_priv->bdb = (struct bdb_header *)((u8 *)bios + VBT_OFFSET +
+ dev_priv->vbt->bdb_offset);
+
+ if (memcmp(dev_priv->vbt->signature, "$VBT", 4) != 0) {
+ DRM_ERROR("Bad VBT signature\n");
+ pci_unmap_rom(pdev, bios);
+ return NULL;
+ }
+
+ return bios;
+}
+
+#if 0
+/**
+ * Returns the BIOS's fixed panel mode.
+ *
+ * Note that many BIOSes will have the appropriate tables for a panel even when
+ * a panel is not attached. Additionally, many BIOSes adjust table sizes or
+ * offsets, such that this parsing fails. Thus, almost any other method for
+ * detecting the panel mode is preferable.
+ */
+struct drm_display_mode *
+i830_bios_get_panel_mode(struct drm_device *dev, bool *wants_dither)
+{
+ I830Ptr pI830 = I830PTR(pScrn);
+ struct vbt_header *vbt;
+ struct bdb_header *bdb;
+ int vbt_off, bdb_off, bdb_block_off, block_size;
+ int panel_type = -1;
+ unsigned char *bios;
+
+ bios = i830_bios_get (pScrn);
+
+ if (bios == NULL)
+ return NULL;
+
+ vbt_off = INTEL_BIOS_16(0x1a);
+ vbt = (struct vbt_header *)(bios + vbt_off);
+ bdb_off = vbt_off + vbt->bdb_offset;
+ bdb = (struct bdb_header *)(bios + bdb_off);
+
+ if (memcmp(bdb->signature, "BIOS_DATA_BLOCK ", 16) != 0) {
+ xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "Bad BDB signature\n");
+ xfree(bios);
+ return NULL;
+ }
+
+ *wants_dither = FALSE;
+ for (bdb_block_off = bdb->header_size; bdb_block_off < bdb->bdb_size;
+ bdb_block_off += block_size)
+ {
+ int start = bdb_off + bdb_block_off;
+ int id;
+ struct lvds_bdb_1 *lvds1;
+ struct lvds_bdb_2 *lvds2;
+ struct lvds_bdb_2_fp_params *fpparam;
+ struct lvds_bdb_2_fp_edid_dtd *fptiming;
+ DisplayModePtr fixed_mode;
+ CARD8 *timing_ptr;
+
+ id = INTEL_BIOS_8(start);
+ block_size = INTEL_BIOS_16(start + 1) + 3;
+ switch (id) {
+ case 40:
+ lvds1 = (struct lvds_bdb_1 *)(bios + start);
+ panel_type = lvds1->panel_type;
+ if (lvds1->caps & LVDS_CAP_DITHER)
+ *wants_dither = TRUE;
+ break;
+ case 41:
+ if (panel_type == -1)
+ break;
+
+ lvds2 = (struct lvds_bdb_2 *)(bios + start);
+ fpparam = (struct lvds_bdb_2_fp_params *)(bios +
+ bdb_off + lvds2->panels[panel_type].fp_params_offset);
+ fptiming = (struct lvds_bdb_2_fp_edid_dtd *)(bios +
+ bdb_off + lvds2->panels[panel_type].fp_edid_dtd_offset);
+ timing_ptr = bios + bdb_off +
+ lvds2->panels[panel_type].fp_edid_dtd_offset;
+
+ if (fpparam->terminator != 0xffff) {
+ /* Apparently the offsets are wrong for some BIOSes, so we
+ * try the other offsets if we find a bad terminator.
+ */
+ fpparam = (struct lvds_bdb_2_fp_params *)(bios +
+ bdb_off + lvds2->panels[panel_type].fp_params_offset + 8);
+ fptiming = (struct lvds_bdb_2_fp_edid_dtd *)(bios +
+ bdb_off + lvds2->panels[panel_type].fp_edid_dtd_offset + 8);
+ timing_ptr = bios + bdb_off +
+ lvds2->panels[panel_type].fp_edid_dtd_offset + 8;
+
+ if (fpparam->terminator != 0xffff)
+ continue;
+ }
+
+ fixed_mode = xnfalloc(sizeof(DisplayModeRec));
+ memset(fixed_mode, 0, sizeof(*fixed_mode));
+
+ /* Since lvds_bdb_2_fp_edid_dtd is just an EDID detailed timing
+ * block, pull the contents out using EDID macros.
+ */
+ fixed_mode->HDisplay = _H_ACTIVE(timing_ptr);
+ fixed_mode->VDisplay = _V_ACTIVE(timing_ptr);
+ fixed_mode->HSyncStart = fixed_mode->HDisplay +
+ _H_SYNC_OFF(timing_ptr);
+ fixed_mode->HSyncEnd = fixed_mode->HSyncStart +
+ _H_SYNC_WIDTH(timing_ptr);
+ fixed_mode->HTotal = fixed_mode->HDisplay +
+ _H_BLANK(timing_ptr);
+ fixed_mode->VSyncStart = fixed_mode->VDisplay +
+ _V_SYNC_OFF(timing_ptr);
+ fixed_mode->VSyncEnd = fixed_mode->VSyncStart +
+ _V_SYNC_WIDTH(timing_ptr);
+ fixed_mode->VTotal = fixed_mode->VDisplay +
+ _V_BLANK(timing_ptr);
+ fixed_mode->Clock = _PIXEL_CLOCK(timing_ptr) / 1000;
+ fixed_mode->type = M_T_PREFERRED;
+
+ xf86SetModeDefaultName(fixed_mode);
+
+ if (pI830->debug_modes) {
+ xf86DrvMsg(pScrn->scrnIndex, X_INFO,
+ "Found panel mode in BIOS VBT tables:\n");
+ xf86PrintModeline(pScrn->scrnIndex, fixed_mode);
+ }
+
+ xfree(bios);
+ return fixed_mode;
+ }
+ }
+
+ xfree(bios);
+ return NULL;
+}
+
+unsigned char *
+i830_bios_get_aim_data_block (ScrnInfoPtr pScrn, int aim, int data_block)
+{
+ unsigned char *bios;
+ int bdb_off;
+ int vbt_off;
+ int aim_off;
+ struct vbt_header *vbt;
+ struct aimdb_header *aimdb;
+ struct aimdb_block *aimdb_block;
+
+ bios = i830_bios_get (pScrn);
+ if (!bios)
+ return NULL;
+
+ vbt_off = INTEL_BIOS_16(0x1a);
+ vbt = (struct vbt_header *)(bios + vbt_off);
+
+ aim_off = vbt->aim_offset[aim];
+ if (!aim_off)
+ {
+ free (bios);
+ return NULL;
+ }
+ xf86DrvMsg(pScrn->scrnIndex, X_INFO, "aim_off %d\n", aim_off);
+ aimdb = (struct aimdb_header *) (bios + vbt_off + aim_off);
+ bdb_off = aimdb->aimdb_header_size;
+ while (bdb_off < aimdb->aimdb_size)
+ {
+ aimdb_block = (struct aimdb_block *) (bios + vbt_off + aim_off + bdb_off);
+ if (aimdb_block->aimdb_id == data_block)
+ {
+ unsigned char *aim = malloc (aimdb_block->aimdb_size + sizeof (struct aimdb_block));
+ if (!aim)
+ {
+ free (bios);
+ return NULL;
+ }
+ memcpy (aim, aimdb_block, aimdb_block->aimdb_size + sizeof (struct aimdb_block));
+ free (bios);
+ return aim;
+ }
+ bdb_off += aimdb_block->aimdb_size + sizeof (struct aimdb_block);
+ }
+ free (bios);
+ return NULL;
+}
+#endif
diff --git a/linux-core/intel_bios.h b/linux-core/intel_bios.h
new file mode 100644
index 00000000..b17856de
--- /dev/null
+++ b/linux-core/intel_bios.h
@@ -0,0 +1,187 @@
+/*
+ * Copyright © 2006 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>
+ *
+ */
+
+#ifndef _I830_BIOS_H_
+#define _I830_BIOS_H_
+
+#include "drmP.h"
+
+struct vbt_header {
+ u8 signature[20]; /**< Always starts with 'VBT$' */
+ u16 version; /**< decimal */
+ u16 header_size; /**< in bytes */
+ u16 vbt_size; /**< in bytes */
+ u8 vbt_checksum;
+ u8 reserved0;
+ u32 bdb_offset; /**< from beginning of VBT */
+ u32 aim_offset[4]; /**< from beginning of VBT */
+} __attribute__((packed));
+
+struct bdb_header {
+ u8 signature[16]; /**< Always 'BIOS_DATA_BLOCK' */
+ u16 version; /**< decimal */
+ u16 header_size; /**< in bytes */
+ u16 bdb_size; /**< in bytes */
+ u8 type; /* 0 == desktop, 1 == mobile */
+ u8 relstage;
+ u8 chipset;
+ u8 lvds_present:1;
+ u8 tv_present:1;
+ u8 rsvd2:6; /* finish byte */
+ u8 rsvd3[4];
+ u8 signon[155];
+ u8 copyright[61];
+ u16 code_segment;
+ u8 dos_boot_mode;
+ u8 bandwidth_percent;
+ u8 rsvd4;
+ u8 resize_pci_bios;
+ u8 rsvd5;
+ u8 rsvd6[3];
+ u8 panel_fitting:2;
+ u8 flexaim:1;
+ u8 msg_enable:1;
+ u8 clear_screen:1;
+ u8 color_flip:1;
+ u8 rsvd7:2; /* finish byte */
+ u8 download_ext_vbt:1;
+ u8 enable_ssc:1;
+ u8 ssc_freq:1;
+ u8 enable_lfp_on_override:1;
+ u8 disable_ssc_ddt:1;
+ u8 rsvd8:3; /* finish byte */
+ u8 disable_smooth_vision:1;
+ u8 single_dvi:1;
+ u8 rsvd9:6; /* finish byte */
+ u8 legacy_monitor_detect:1;
+ u8 rsvd10:7; /* finish byte */
+ u8 int_crt_support:1;
+ u8 int_tv_support:1;
+ u8 rsvd11:6; /* finish byte */
+} __attribute__((packed));
+
+#define LVDS_CAP_EDID (1 << 6)
+#define LVDS_CAP_DITHER (1 << 5)
+#define LVDS_CAP_PFIT_AUTO_RATIO (1 << 4)
+#define LVDS_CAP_PFIT_GRAPHICS_MODE (1 << 3)
+#define LVDS_CAP_PFIT_TEXT_MODE (1 << 2)
+#define LVDS_CAP_PFIT_GRAPHICS (1 << 1)
+#define LVDS_CAP_PFIT_TEXT (1 << 0)
+struct lvds_bdb_1 {
+ u8 id; /**< 40 */
+ u16 size;
+ u8 panel_type;
+ u8 reserved0;
+ u16 caps;
+} __attribute__((packed));
+
+struct lvds_bdb_2_fp_params {
+ u16 x_res;
+ u16 y_res;
+ u32 lvds_reg;
+ u32 lvds_reg_val;
+ u32 pp_on_reg;
+ u32 pp_on_reg_val;
+ u32 pp_off_reg;
+ u32 pp_off_reg_val;
+ u32 pp_cycle_reg;
+ u32 pp_cycle_reg_val;
+ u32 pfit_reg;
+ u32 pfit_reg_val;
+ u16 terminator;
+} __attribute__((packed));
+
+struct lvds_bdb_2_fp_edid_dtd {
+ u16 dclk; /**< In 10khz */
+ u8 hactive;
+ u8 hblank;
+ u8 high_h; /**< 7:4 = hactive 11:8, 3:0 = hblank 11:8 */
+ u8 vactive;
+ u8 vblank;
+ u8 high_v; /**< 7:4 = vactive 11:8, 3:0 = vblank 11:8 */
+ u8 hsync_off;
+ u8 hsync_pulse_width;
+ u8 vsync_off;
+ u8 high_hsync_off; /**< 7:6 = hsync off 9:8 */
+ u8 h_image;
+ u8 v_image;
+ u8 max_hv;
+ u8 h_border;
+ u8 v_border;
+ u8 flags;
+#define FP_EDID_FLAG_VSYNC_POSITIVE (1 << 2)
+#define FP_EDID_FLAG_HSYNC_POSITIVE (1 << 1)
+} __attribute__((packed));
+
+struct lvds_bdb_2_entry {
+ u16 fp_params_offset; /**< From beginning of BDB */
+ u8 fp_params_size;
+ u16 fp_edid_dtd_offset;
+ u8 fp_edid_dtd_size;
+ u16 fp_edid_pid_offset;
+ u8 fp_edid_pid_size;
+} __attribute__((packed));
+
+struct lvds_bdb_2 {
+ u8 id; /**< 41 */
+ u16 size;
+ u8 table_size; /* not sure on this one */
+ struct lvds_bdb_2_entry panels[16];
+} __attribute__((packed));
+
+struct aimdb_header {
+ char signature[16];
+ char oem_device[20];
+ u16 aimdb_version;
+ u16 aimdb_header_size;
+ u16 aimdb_size;
+} __attribute__((packed));
+
+struct aimdb_block {
+ u8 aimdb_id;
+ u16 aimdb_size;
+} __attribute__((packed));
+
+struct vch_panel_data {
+ u16 fp_timing_offset;
+ u8 fp_timing_size;
+ u16 dvo_timing_offset;
+ u8 dvo_timing_size;
+ u16 text_fitting_offset;
+ u8 text_fitting_size;
+ u16 graphics_fitting_offset;
+ u8 graphics_fitting_size;
+} __attribute__((packed));
+
+struct vch_bdb_22 {
+ struct aimdb_block aimdb_block;
+ struct vch_panel_data panels[16];
+} __attribute__((packed));
+
+bool intel_find_bios(struct drm_device *dev);
+
+#endif /* _I830_BIOS_H_ */
diff --git a/shared-core/i915_drv.h b/shared-core/i915_drv.h
index a7040f5b..2e7b6bd2 100644
--- a/shared-core/i915_drv.h
+++ b/shared-core/i915_drv.h
@@ -33,6 +33,8 @@
/* General customization:
*/
+#include "intel_bios.h"
+
#define DRIVER_AUTHOR "Tungsten Graphics, Inc."
#define DRIVER_NAME "i915"
@@ -171,6 +173,10 @@ struct drm_i915_private {
struct drm_buffer_object *sarea_bo;
struct drm_bo_kmap_obj sarea_kmap;
+ /* BIOS data */
+ struct vbt_header *vbt;
+ struct bdb_header *bdb;
+
/* Register state */
u8 saveLBB;
u32 saveDSPACNTR;
diff --git a/shared-core/i915_init.c b/shared-core/i915_init.c
index 53574eb7..8824b959 100644
--- a/shared-core/i915_init.c
+++ b/shared-core/i915_init.c
@@ -12,6 +12,7 @@
#include "drm_sarea.h"
#include "i915_drm.h"
#include "i915_drv.h"
+#include "intel_bios.h"
/**
* i915_probe_agp - get AGP bootup configuration
@@ -259,6 +260,12 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
DRM_DEBUG("Error\n");
}
+ ret = intel_find_bios(dev);
+ if (ret) {
+ DRM_ERROR("failed to find VBT\n");
+ return -ENODEV;
+ }
+
intel_modeset_init(dev);
drm_initial_config(dev, false);
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-04 02:53:24 +0000