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i915: Added function to initialize VBT settings

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Added a function that sets the LVDS values to default settings.  This
will be called by intel_init_bios before checking for the VBT (video BIOS
table). The default values are thus loaded regardless of whether a VBT
is found.

The default settings in each parse function have been moved to the new
function. This consolidates all the default settings into one place.

The default dither bit value has been changed from 0 to 1.  We can
assume that display devices will want dithering enabled.

Signed-off-by: Simon Que <sque@chromium.org>
Acked-by: Olof Johansson <olof@lixom.net>
[ickle: fixup for -next]
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Simon Que 2010-09-30 09:36:39 +01:00 committed by Chris Wilson
parent f394940b8d
commit 6a04002bea
1 changed files with 23 additions and 13 deletions
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36
drivers/gpu/drm/i915/intel_bios.c
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@ -129,10 +129,6 @@ parse_lfp_panel_data(struct drm_i915_private *dev_priv,
int i, temp_downclock;
struct drm_display_mode *temp_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;
@ -140,6 +136,7 @@ parse_lfp_panel_data(struct drm_i915_private *dev_priv,
dev_priv->lvds_dither = lvds_options->pixel_dither;
if (lvds_options->panel_type == 0xff)
return;
panel_type = lvds_options->panel_type;
lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
@ -232,8 +229,6 @@ parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
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;
@ -262,10 +257,6 @@ parse_general_features(struct drm_i915_private *dev_priv,
struct drm_device *dev = dev_priv->dev;
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;
@ -423,8 +414,6 @@ parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
{
struct bdb_edp *edp;
dev_priv->edp.bpp = 18;
edp = find_section(bdb, BDB_EDP);
if (!edp) {
if (SUPPORTS_EDP(dev_priv->dev) && dev_priv->edp.support) {
@ -528,6 +517,27 @@ parse_device_mapping(struct drm_i915_private *dev_priv,
return;
}
static void
init_vbt_defaults(struct drm_i915_private *dev_priv)
{
dev_priv->crt_ddc_pin = GMBUS_PORT_VGADDC;
/* LFP panel data */
dev_priv->lvds_dither = 1;
dev_priv->lvds_vbt = 0;
/* SDVO panel data */
dev_priv->sdvo_lvds_vbt_mode = NULL;
/* general features */
dev_priv->int_tv_support = 1;
dev_priv->int_crt_support = 1;
dev_priv->lvds_use_ssc = 0;
/* eDP data */
dev_priv->edp.bpp = 18;
}
/**
* intel_init_bios - initialize VBIOS settings & find VBT
* @dev: DRM device
@ -545,7 +555,7 @@ intel_init_bios(struct drm_device *dev)
struct bdb_header *bdb = NULL;
u8 __iomem *bios = NULL;
dev_priv->crt_ddc_pin = GMBUS_PORT_VGADDC;
init_vbt_defaults(dev_priv);
/* XXX Should this validation be moved to intel_opregion.c? */
if (dev_priv->opregion.vbt) {