diff options
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_bios.c | 142 |
1 files changed, 83 insertions, 59 deletions
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c index 927442a1192..61abef8a811 100644 --- a/drivers/gpu/drm/i915/intel_bios.c +++ b/drivers/gpu/drm/i915/intel_bios.c @@ -74,7 +74,7 @@ get_blocksize(void *p) static void fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode, - struct lvds_dvo_timing *dvo_timing) + const struct lvds_dvo_timing *dvo_timing) { panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) | dvo_timing->hactive_lo; @@ -115,20 +115,75 @@ fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode, drm_mode_set_name(panel_fixed_mode); } +static bool +lvds_dvo_timing_equal_size(const struct lvds_dvo_timing *a, + const struct lvds_dvo_timing *b) +{ + if (a->hactive_hi != b->hactive_hi || + a->hactive_lo != b->hactive_lo) + return false; + + if (a->hsync_off_hi != b->hsync_off_hi || + a->hsync_off_lo != b->hsync_off_lo) + return false; + + if (a->hsync_pulse_width != b->hsync_pulse_width) + return false; + + if (a->hblank_hi != b->hblank_hi || + a->hblank_lo != b->hblank_lo) + return false; + + if (a->vactive_hi != b->vactive_hi || + a->vactive_lo != b->vactive_lo) + return false; + + if (a->vsync_off != b->vsync_off) + return false; + + if (a->vsync_pulse_width != b->vsync_pulse_width) + return false; + + if (a->vblank_hi != b->vblank_hi || + a->vblank_lo != b->vblank_lo) + return false; + + return true; +} + +static const struct lvds_dvo_timing * +get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data, + const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs, + int index) +{ + /* + * the size of fp_timing varies on the different platform. + * So calculate the DVO timing relative offset in LVDS data + * entry to get the DVO timing entry + */ + + int lfp_data_size = + lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset - + lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset; + int dvo_timing_offset = + lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset - + lvds_lfp_data_ptrs->ptr[0].fp_timing_offset; + char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index; + + return (struct lvds_dvo_timing *)(entry + dvo_timing_offset); +} + /* Try to find integrated panel data */ static void parse_lfp_panel_data(struct drm_i915_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_ptrs *lvds_lfp_data_ptrs; - struct bdb_lvds_lfp_data_entry *entry; - struct lvds_dvo_timing *dvo_timing; + const struct bdb_lvds_options *lvds_options; + const struct bdb_lvds_lfp_data *lvds_lfp_data; + const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs; + const struct lvds_dvo_timing *panel_dvo_timing; struct drm_display_mode *panel_fixed_mode; - int lfp_data_size, dvo_timing_offset; - int i, temp_downclock; - struct drm_display_mode *temp_mode; + int i, downclock; lvds_options = find_section(bdb, BDB_LVDS_OPTIONS); if (!lvds_options) @@ -150,75 +205,44 @@ parse_lfp_panel_data(struct drm_i915_private *dev_priv, dev_priv->lvds_vbt = 1; - lfp_data_size = lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset - - lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset; - entry = (struct bdb_lvds_lfp_data_entry *) - ((uint8_t *)lvds_lfp_data->data + (lfp_data_size * - lvds_options->panel_type)); - dvo_timing_offset = lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset - - lvds_lfp_data_ptrs->ptr[0].fp_timing_offset; - - /* - * the size of fp_timing varies on the different platform. - * So calculate the DVO timing relative offset in LVDS data - * entry to get the DVO timing entry - */ - dvo_timing = (struct lvds_dvo_timing *) - ((unsigned char *)entry + dvo_timing_offset); + panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data, + lvds_lfp_data_ptrs, + lvds_options->panel_type); panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL); if (!panel_fixed_mode) return; - fill_detail_timing_data(panel_fixed_mode, dvo_timing); + fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing); dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode; DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n"); drm_mode_debug_printmodeline(panel_fixed_mode); - temp_mode = kzalloc(sizeof(*temp_mode), GFP_KERNEL); - temp_downclock = panel_fixed_mode->clock; /* - * enumerate the LVDS panel timing info entry in VBT to check whether - * the LVDS downclock is found. + * Iterate over the LVDS panel timing info to find the lowest clock + * for the native resolution. */ + downclock = panel_dvo_timing->clock; for (i = 0; i < 16; i++) { - entry = (struct bdb_lvds_lfp_data_entry *) - ((uint8_t *)lvds_lfp_data->data + (lfp_data_size * i)); - dvo_timing = (struct lvds_dvo_timing *) - ((unsigned char *)entry + dvo_timing_offset); - - fill_detail_timing_data(temp_mode, dvo_timing); - - if (temp_mode->hdisplay == panel_fixed_mode->hdisplay && - temp_mode->hsync_start == panel_fixed_mode->hsync_start && - temp_mode->hsync_end == panel_fixed_mode->hsync_end && - temp_mode->htotal == panel_fixed_mode->htotal && - temp_mode->vdisplay == panel_fixed_mode->vdisplay && - temp_mode->vsync_start == panel_fixed_mode->vsync_start && - temp_mode->vsync_end == panel_fixed_mode->vsync_end && - temp_mode->vtotal == panel_fixed_mode->vtotal && - temp_mode->clock < temp_downclock) { - /* - * downclock is already found. But we expect - * to find the lower downclock. - */ - temp_downclock = temp_mode->clock; - } - /* clear it to zero */ - memset(temp_mode, 0, sizeof(*temp_mode)); + const struct lvds_dvo_timing *dvo_timing; + + dvo_timing = get_lvds_dvo_timing(lvds_lfp_data, + lvds_lfp_data_ptrs, + i); + if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) && + dvo_timing->clock < downclock) + downclock = dvo_timing->clock; } - kfree(temp_mode); - if (temp_downclock < panel_fixed_mode->clock && - i915_lvds_downclock) { + + if (downclock < panel_dvo_timing->clock && i915_lvds_downclock) { dev_priv->lvds_downclock_avail = 1; - dev_priv->lvds_downclock = temp_downclock; + dev_priv->lvds_downclock = downclock * 10; DRM_DEBUG_KMS("LVDS downclock is found in VBT. " "Normal Clock %dKHz, downclock %dKHz\n", - temp_downclock, panel_fixed_mode->clock); + panel_fixed_mode->clock, 10*downclock); } - return; } /* Try to find sdvo panel data */ |