[PATCH v2 15/16] drm/i915: Add pipe B force quirk for 830M

ville.syrjala
2014-08-14T22:27:17Z

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

830M has problems when some of the pipes are disabled. Namely if a
plane, DVO port etc. is currently assigned to a disabled pipe, it
can't moved to the other pipe until the current pipe is also enabled.
To keep things simple just leave both pipes running all the time.

Ideally I think should turn the pipes off if neither is active, and
when either becomes active we enable both. But that would reuquire
proper atomic modeset support, and probably a bit of extra care in
the order things get enabled.

v2: Reorder wrt. double wide handling changes

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/intel_display.c | 39 +++++++++++++++++++++++++-----------
2 files changed, 28 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 54895a6..b1ed71e 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -706,6 +706,7 @@ enum intel_sbi_destination {
#define QUIRK_LVDS_SSC_DISABLE (1<<1)
#define QUIRK_INVERT_BRIGHTNESS (1<<2)
#define QUIRK_BACKLIGHT_PRESENT (1<<3)
+#define QUIRK_PIPEB_FORCE (1<<4)

struct intel_fbdev;
struct intel_fbc_work;
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index e1c0c0b..92baf6f 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1194,8 +1194,9 @@ void assert_pipe(struct drm_i915_private *dev_priv,
enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
pipe);

- /* if we need the pipe A quirk it must be always on */
- if (pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE)
+ /* if we need the pipe quirk it must be always on */
+ if ((pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE) ||
+ (pipe == PIPE_B && dev_priv->quirks & QUIRK_PIPEB_FORCE))
state = true;

if (!intel_display_power_enabled(dev_priv,
@@ -1626,8 +1627,9 @@ static void i9xx_disable_pll(struct intel_crtc *crtc)
}
}

- /* Don't disable pipe A or pipe A PLLs if needed */
- if (pipe == PIPE_A && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
+ /* Don't disable pipe or pipe PLLs if needed */
+ if ((pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE) ||
+ (pipe == PIPE_B && dev_priv->quirks & QUIRK_PIPEB_FORCE))
return;

/* Make sure the pipe isn't still relying on us */
@@ -1995,8 +1997,8 @@ static void intel_enable_pipe(struct intel_crtc *crtc)
reg = PIPECONF(cpu_transcoder);
val = I915_READ(reg);
if (val & PIPECONF_ENABLE) {
- WARN_ON(!(pipe == PIPE_A &&
- dev_priv->quirks & QUIRK_PIPEA_FORCE));
+ WARN_ON(!((pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE) ||
+ (pipe == PIPE_B && dev_priv->quirks & QUIRK_PIPEB_FORCE)));
return;
}

@@ -2043,7 +2045,8 @@ static void intel_disable_pipe(struct intel_crtc *crtc)
val &= ~PIPECONF_DOUBLE_WIDE;

/* Don't disable pipe or pipe PLLs if needed */
- if (!(pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE))
+ if (!(pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE) &&
+ !(pipe == PIPE_B && dev_priv->quirks & QUIRK_PIPEB_FORCE))
val &= ~PIPECONF_ENABLE;

I915_WRITE(reg, val);
@@ -5968,9 +5971,9 @@ static void i9xx_set_pipeconf(struct intel_crtc *intel_crtc)

pipeconf = 0;

- if (dev_priv->quirks & QUIRK_PIPEA_FORCE &&
- I915_READ(PIPECONF(intel_crtc->pipe)) & PIPECONF_ENABLE)
- pipeconf |= PIPECONF_ENABLE;
+ if ((intel_crtc->pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE) ||
+ (intel_crtc->pipe == PIPE_B && dev_priv->quirks & QUIRK_PIPEB_FORCE))
+ pipeconf |= I915_READ(PIPECONF(intel_crtc->pipe)) & PIPECONF_ENABLE;

if (intel_crtc->config.double_wide)
pipeconf |= PIPECONF_DOUBLE_WIDE;
@@ -10680,8 +10683,9 @@ check_crtc_state(struct drm_device *dev)
active = dev_priv->display.get_pipe_config(crtc,
&pipe_config);

- /* hw state is inconsistent with the pipe A quirk */
- if (crtc->pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE)
+ /* hw state is inconsistent with the pipe quirk */
+ if ((crtc->pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE) ||
+ (crtc->pipe == PIPE_B && dev_priv->quirks & QUIRK_PIPEB_FORCE))
active = crtc->active;

for_each_intel_encoder(dev, encoder) {
@@ -12429,6 +12433,14 @@ static void quirk_pipea_force(struct drm_device *dev)
DRM_INFO("applying pipe a force quirk\n");
}

+static void quirk_pipeb_force(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ dev_priv->quirks |= QUIRK_PIPEB_FORCE;
+ DRM_INFO("applying pipe b force quirk\n");
+}
+
/*
* Some machines (Lenovo U160) do not work with SSC on LVDS for some reason
*/
@@ -12506,6 +12518,9 @@ static struct intel_quirk intel_quirks[] = {
/* 830 needs to leave pipe A & dpll A up */
{ 0x3577, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },

+ /* 830 needs to leave pipe B & dpll B up */
+ { 0x3577, PCI_ANY_ID, PCI_ANY_ID, quirk_pipeb_force },
+
/* Lenovo U160 cannot use SSC on LVDS */
{ 0x0046, 0x17aa, 0x3920, quirk_ssc_force_disable },

--
1.8.5.5