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drm/i915: eDP mode set sequence corrections

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We should disable the panel first when shutting down an eDP link.  And
when turning one on, the panel needs to be enabled before link training
or eDP I/O won't be enabled.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Jesse Barnes 2010-08-11 10:06:44 -07:00
parent 37c6c9b0e9
commit 7643a7fa16
1 changed files with 8 additions and 9 deletions
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17
drivers/gpu/drm/i915/intel_dp.c
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@ -840,20 +840,19 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode)
uint32_t dp_reg = I915_READ(intel_dp->output_reg);
if (mode != DRM_MODE_DPMS_ON) {
if (dp_reg & DP_PORT_EN) {
intel_dp_link_down(intel_dp);
if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) {
ironlake_edp_backlight_off(dev);
ironlake_edp_panel_off(dev);
}
if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) {
ironlake_edp_backlight_off(dev);
ironlake_edp_panel_off(dev);
}
if (dp_reg & DP_PORT_EN)
intel_dp_link_down(intel_dp);
} else {
if (!(dp_reg & DP_PORT_EN)) {
intel_dp_link_train(intel_dp);
if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) {
if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
ironlake_edp_panel_on(dev);
intel_dp_link_train(intel_dp);
if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
ironlake_edp_backlight_on(dev);
}
}
}
intel_dp->dpms_mode = mode;