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drm/i915: Clean up LVDS register handling 

Keep single 'lvds_reg' and 'lvds' variable around in
intel_lvds_init(), and read it just once at the start.

Also intel_lvds_get_config() doesn't need to figure out which reg to use
since it can just consult lvds_encoder->reg.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
hifive-unleashed-5.1
Ville Syrjälä 2015-09-18 20:03:45 +03:00 committed by Daniel Vetter
parent 649636ef82
commit d0669d0075
1 changed files with 14 additions and 16 deletions
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30
drivers/gpu/drm/i915/intel_lvds.c
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@ -98,15 +98,11 @@ static void intel_lvds_get_config(struct intel_encoder *encoder,
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 lvds_reg, tmp, flags = 0;
struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
u32 tmp, flags = 0;
int dotclock;
if (HAS_PCH_SPLIT(dev))
lvds_reg = PCH_LVDS;
else
lvds_reg = LVDS;
tmp = I915_READ(lvds_reg);
tmp = I915_READ(lvds_encoder->reg);
if (tmp & LVDS_HSYNC_POLARITY)
flags |= DRM_MODE_FLAG_NHSYNC;
else
@ -943,6 +939,7 @@ void intel_lvds_init(struct drm_device *dev)
struct drm_display_mode *downclock_mode = NULL;
struct edid *edid;
struct drm_crtc *crtc;
u32 lvds_reg;
u32 lvds;
int pipe;
u8 pin;
@ -965,8 +962,15 @@ void intel_lvds_init(struct drm_device *dev)
if (dmi_check_system(intel_no_lvds))
return;
if (HAS_PCH_SPLIT(dev))
lvds_reg = PCH_LVDS;
else
lvds_reg = LVDS;
lvds = I915_READ(lvds_reg);
if (HAS_PCH_SPLIT(dev)) {
if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0)
if ((lvds & LVDS_DETECTED) == 0)
return;
if (dev_priv->vbt.edp_support) {
DRM_DEBUG_KMS("disable LVDS for eDP support\n");
@ -976,8 +980,7 @@ void intel_lvds_init(struct drm_device *dev)
pin = GMBUS_PIN_PANEL;
if (!lvds_is_present_in_vbt(dev, &pin)) {
u32 reg = HAS_PCH_SPLIT(dev) ? PCH_LVDS : LVDS;
if ((I915_READ(reg) & LVDS_PORT_EN) == 0) {
if ((lvds & LVDS_PORT_EN) == 0) {
DRM_DEBUG_KMS("LVDS is not present in VBT\n");
return;
}
@ -1054,11 +1057,7 @@ void intel_lvds_init(struct drm_device *dev)
connector->interlace_allowed = false;
connector->doublescan_allowed = false;
if (HAS_PCH_SPLIT(dev)) {
lvds_encoder->reg = PCH_LVDS;
} else {
lvds_encoder->reg = LVDS;
}
lvds_encoder->reg = lvds_reg;
/* create the scaling mode property */
drm_mode_create_scaling_mode_property(dev);
@ -1139,7 +1138,6 @@ void intel_lvds_init(struct drm_device *dev)
if (HAS_PCH_SPLIT(dev))
goto failed;
lvds = I915_READ(LVDS);
pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
crtc = intel_get_crtc_for_pipe(dev, pipe);