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path: root/drivers/gpu/drm/i915/intel_display.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
-rw-r--r--drivers/gpu/drm/i915/intel_display.c76
1 files changed, 62 insertions, 14 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 255b52e..d9b7092 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2120,9 +2120,11 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc)
reg = TRANS_DP_CTL(pipe);
temp = I915_READ(reg);
temp &= ~(TRANS_DP_PORT_SEL_MASK |
- TRANS_DP_SYNC_MASK);
+ TRANS_DP_SYNC_MASK |
+ TRANS_DP_BPC_MASK);
temp |= (TRANS_DP_OUTPUT_ENABLE |
TRANS_DP_ENH_FRAMING);
+ temp |= TRANS_DP_8BPC;
if (crtc->mode.flags & DRM_MODE_FLAG_PHSYNC)
temp |= TRANS_DP_HSYNC_ACTIVE_HIGH;
@@ -2712,27 +2714,19 @@ fdi_reduce_ratio(u32 *num, u32 *den)
}
}
-#define DATA_N 0x800000
-#define LINK_N 0x80000
-
static void
ironlake_compute_m_n(int bits_per_pixel, int nlanes, int pixel_clock,
int link_clock, struct fdi_m_n *m_n)
{
- u64 temp;
-
m_n->tu = 64; /* default size */
- temp = (u64) DATA_N * pixel_clock;
- temp = div_u64(temp, link_clock);
- m_n->gmch_m = div_u64(temp * bits_per_pixel, nlanes);
- m_n->gmch_m >>= 3; /* convert to bytes_per_pixel */
- m_n->gmch_n = DATA_N;
+ /* BUG_ON(pixel_clock > INT_MAX / 36); */
+ m_n->gmch_m = bits_per_pixel * pixel_clock;
+ m_n->gmch_n = link_clock * nlanes * 8;
fdi_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n);
- temp = (u64) LINK_N * pixel_clock;
- m_n->link_m = div_u64(temp, link_clock);
- m_n->link_n = LINK_N;
+ m_n->link_m = pixel_clock;
+ m_n->link_n = link_clock;
fdi_reduce_ratio(&m_n->link_m, &m_n->link_n);
}
@@ -3716,6 +3710,7 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
/* FDI link */
if (HAS_PCH_SPLIT(dev)) {
+ int pixel_multiplier = intel_mode_get_pixel_multiplier(adjusted_mode);
int lane = 0, link_bw, bpp;
/* CPU eDP doesn't require FDI link, so just set DP M/N
according to current link config */
@@ -3799,6 +3794,8 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
intel_crtc->fdi_lanes = lane;
+ if (pixel_multiplier > 1)
+ link_bw *= pixel_multiplier;
ironlake_compute_m_n(bpp, lane, target_clock, link_bw, &m_n);
}
@@ -5236,6 +5233,55 @@ static const struct drm_crtc_funcs intel_crtc_funcs = {
.page_flip = intel_crtc_page_flip,
};
+static void intel_sanitize_modesetting(struct drm_device *dev,
+ int pipe, int plane)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ u32 reg, val;
+
+ if (HAS_PCH_SPLIT(dev))
+ return;
+
+ /* Who knows what state these registers were left in by the BIOS or
+ * grub?
+ *
+ * If we leave the registers in a conflicting state (e.g. with the
+ * display plane reading from the other pipe than the one we intend
+ * to use) then when we attempt to teardown the active mode, we will
+ * not disable the pipes and planes in the correct order -- leaving
+ * a plane reading from a disabled pipe and possibly leading to
+ * undefined behaviour.
+ */
+
+ reg = DSPCNTR(plane);
+ val = I915_READ(reg);
+
+ if ((val & DISPLAY_PLANE_ENABLE) == 0)
+ return;
+ if (!!(val & DISPPLANE_SEL_PIPE_MASK) == pipe)
+ return;
+
+ /* This display plane is active and attached to the other CPU pipe. */
+ pipe = !pipe;
+
+ /* Disable the plane and wait for it to stop reading from the pipe. */
+ I915_WRITE(reg, val & ~DISPLAY_PLANE_ENABLE);
+ intel_flush_display_plane(dev, plane);
+
+ if (IS_GEN2(dev))
+ intel_wait_for_vblank(dev, pipe);
+
+ if (pipe == 0 && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
+ return;
+
+ /* Switch off the pipe. */
+ reg = PIPECONF(pipe);
+ val = I915_READ(reg);
+ if (val & PIPECONF_ENABLE) {
+ I915_WRITE(reg, val & ~PIPECONF_ENABLE);
+ intel_wait_for_pipe_off(dev, pipe);
+ }
+}
static void intel_crtc_init(struct drm_device *dev, int pipe)
{
@@ -5287,6 +5333,8 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
setup_timer(&intel_crtc->idle_timer, intel_crtc_idle_timer,
(unsigned long)intel_crtc);
+
+ intel_sanitize_modesetting(dev, intel_crtc->pipe, intel_crtc->plane);
}
int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
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