From 4a33e48d0e121953342194b45d33dc752353d62b Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Sat, 6 Jul 2013 12:52:05 +0200 Subject: [PATCH] drm/i915: fix dvo DPLL regression I've missed that intel_dvo_mode_set changes the dpll configuration. Hence when I've reworked the sequence to only enable the dpll in the crtc_enable callback in commit 66e3d5c09940d08d94b03e65b420fadaa7484318 Author: Daniel Vetter Date: Sun Jun 16 21:24:16 2013 +0200 drm/i915: move i9xx dpll enabling into crtc enable function that special DVO bit was lost. Some BSpec reading confirms that it's only needed for DVO encoders. Section 1.5.4, "DPLL A Control Register" for bit 30: "2X Clock Enable. When driving In non-gang DVO modes such as a connected flat panel or TV, a 2X" version of the clock is needed. When not using the 2X output it should be disabled. This bit cannot be set when driving the integrated LVDS port on devices such as Montara-GM." Fix this regression up. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=66516 Cc: Chris Wilson Reported-by: Chris Wilson Reviewed-by: Chris Wilson Partially-tested-by: Chris Wilson Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_reg.h | 3 ++- drivers/gpu/drm/i915/intel_display.c | 11 +++++++---- drivers/gpu/drm/i915/intel_dvo.c | 3 --- 3 files changed, 9 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 9b51be800961..e9c50fab94af 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1126,7 +1126,8 @@ #define _DPLL_B (dev_priv->info->display_mmio_offset + 0x6018) #define DPLL(pipe) _PIPE(pipe, _DPLL_A, _DPLL_B) #define DPLL_VCO_ENABLE (1 << 31) -#define DPLL_DVO_HIGH_SPEED (1 << 30) +#define DPLL_SDVO_HIGH_SPEED (1 << 30) +#define DPLL_DVO_2X_MODE (1 << 30) #define DPLL_EXT_BUFFER_ENABLE_VLV (1 << 30) #define DPLL_SYNCLOCK_ENABLE (1 << 29) #define DPLL_REFA_CLK_ENABLE_VLV (1 << 29) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index a45bb92f35ad..41efd3519e35 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4544,10 +4544,10 @@ static void i9xx_update_pll(struct intel_crtc *crtc, } if (is_sdvo) - dpll |= DPLL_DVO_HIGH_SPEED; + dpll |= DPLL_SDVO_HIGH_SPEED; if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_DISPLAYPORT)) - dpll |= DPLL_DVO_HIGH_SPEED; + dpll |= DPLL_SDVO_HIGH_SPEED; /* compute bitmask from p1 value */ if (IS_PINEVIEW(dev)) @@ -4619,6 +4619,9 @@ static void i8xx_update_pll(struct intel_crtc *crtc, dpll |= PLL_P2_DIVIDE_BY_4; } + if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_DVO)) + dpll |= DPLL_DVO_2X_MODE; + if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS) && intel_panel_use_ssc(dev_priv) && num_connectors < 2) dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN; @@ -5650,9 +5653,9 @@ static uint32_t ironlake_compute_dpll(struct intel_crtc *intel_crtc, << PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT; if (is_sdvo) - dpll |= DPLL_DVO_HIGH_SPEED; + dpll |= DPLL_SDVO_HIGH_SPEED; if (intel_crtc->config.has_dp_encoder) - dpll |= DPLL_DVO_HIGH_SPEED; + dpll |= DPLL_SDVO_HIGH_SPEED; /* compute bitmask from p1 value */ dpll |= (1 << (intel_crtc->config.dpll.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT; diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c index eb2020eb2b7e..cbbc49dc03be 100644 --- a/drivers/gpu/drm/i915/intel_dvo.c +++ b/drivers/gpu/drm/i915/intel_dvo.c @@ -283,7 +283,6 @@ static void intel_dvo_mode_set(struct drm_encoder *encoder, int pipe = intel_crtc->pipe; u32 dvo_val; u32 dvo_reg = intel_dvo->dev.dvo_reg, dvo_srcdim_reg; - int dpll_reg = DPLL(pipe); switch (dvo_reg) { case DVOA: @@ -314,8 +313,6 @@ static void intel_dvo_mode_set(struct drm_encoder *encoder, if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) dvo_val |= DVO_VSYNC_ACTIVE_HIGH; - I915_WRITE(dpll_reg, I915_READ(dpll_reg) | DPLL_DVO_HIGH_SPEED); - /*I915_WRITE(DVOB_SRCDIM, (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) | (adjusted_mode->VDisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/ -- 2.39.5