Noticed while strolling through docs. Might make a few dual-link dvi users happy(ier).
v2: Remove the unrelated debug hacks in intel_display.c v3: Preserve register contexts to not upset fastboot or the modeset hw state checker. Signed-off-by: Daniel Vetter <[email protected]> --- drivers/gpu/drm/i915/i915_reg.h | 2 +- drivers/gpu/drm/i915/intel_sdvo.c | 14 +++++++++++++- 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index f2a5ea6..a981ff5 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1673,7 +1673,7 @@ #define SDVO_ENABLE (1 << 31) #define SDVO_PIPE_B_SELECT (1 << 30) #define SDVO_STALL_SELECT (1 << 29) -#define SDVO_INTERRUPT_ENABLE (1 << 26) +#define SDVO_INTERRUPT_ENABLE_PCH (1 << 23) /** * 915G/GM SDVO pixel multiplier. * diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c index c275bf0..2c1543b 100644 --- a/drivers/gpu/drm/i915/intel_sdvo.c +++ b/drivers/gpu/drm/i915/intel_sdvo.c @@ -1085,6 +1085,9 @@ static void intel_sdvo_mode_set(struct drm_encoder *encoder, if (!mode) return; + /* Preserve the PCH interrupt enable bit. */ + sdvox = I915_READ(intel_sdvo->sdvo_reg) & SDVO_INTERRUPT_ENABLE_PCH; + /* First, set the input mapping for the first input to our controlled * output. This is only correct if we're a single-input device, in * which case the first input is the output from the appropriate SDVO @@ -2775,9 +2778,18 @@ bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg, bool is_sdvob) /* Only enable the hotplug irq if we need it, to work around noisy * hotplug lines. */ - if (intel_sdvo->hotplug_active) + if (intel_sdvo->hotplug_active) { dev_priv->hotplug_supported_mask |= hotplug_mask; + if (HAS_PCH_SPLIT(dev)) { + u32 temp; + + temp = I915_READ(intel_sdvo->sdvo_reg); + temp &= SDVO_INTERRUPT_ENABLE_PCH; + intel_sdvo_write_sdvox(intel_sdvo, temp); + } + } + intel_sdvo_select_ddc_bus(dev_priv, intel_sdvo, sdvo_reg); /* Set the input timing to the screen. Assume always input 0. */ -- 1.7.11.7 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
