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drm/i915: hw state readout support for pixel_multiplier

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Incomplete since ilk+ support needs proper pch dpll tracking first.
SDVO get_config parts based on a patch from Jesse Barnes, but fixed up
to actually work.

v2: Make sure that we call encoder->get_config _after_ we
get_pipe_config to be consistent in both setup_hw_state and the
modeset state checker. Otherwise the clever trick with handling the
pixel mutliplier on i915G/GM where the encoder overrides the default
value of 1 from the crtc get_pipe_config function doesn't work.
Spotted by Imre Deak.

v3: Actually cross-check the pixel mutliplier (but not on pch split
platforms for now). Now actually also tested on a i915G with a sdvo
encoder plugged in.

Cc: Imre Deak <imre.deak@intel.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter
2013-06-06 12:45:25 +02:00
parent 14420bd006
commit 6c49f24180
2 changed files with 66 additions and 3 deletions
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30
drivers/gpu/drm/i915/intel_sdvo.c
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@@ -1313,9 +1313,13 @@ static bool intel_sdvo_get_hw_state(struct intel_encoder *encoder,
static void intel_sdvo_get_config(struct intel_encoder *encoder,
struct intel_crtc_config *pipe_config)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_sdvo *intel_sdvo = to_intel_sdvo(&encoder->base);
struct intel_sdvo_dtd dtd;
u32 flags = 0;
int encoder_pixel_multiplier = 0;
u32 flags = 0, sdvox;
u8 val;
bool ret;
ret = intel_sdvo_get_input_timing(intel_sdvo, &dtd);
@@ -1335,6 +1339,30 @@ static void intel_sdvo_get_config(struct intel_encoder *encoder,
flags |= DRM_MODE_FLAG_NVSYNC;
pipe_config->adjusted_mode.flags |= flags;
if (IS_I915G(dev) || IS_I915GM(dev)) {
sdvox = I915_READ(intel_sdvo->sdvo_reg);
pipe_config->pixel_multiplier =
((sdvox & SDVO_PORT_MULTIPLY_MASK)
>> SDVO_PORT_MULTIPLY_SHIFT) + 1;
}
/* Cross check the port pixel multiplier with the sdvo encoder state. */
intel_sdvo_get_value(intel_sdvo, SDVO_CMD_GET_CLOCK_RATE_MULT, &val, 1);
switch (val) {
case SDVO_CLOCK_RATE_MULT_1X:
encoder_pixel_multiplier = 1;
break;
case SDVO_CLOCK_RATE_MULT_2X:
encoder_pixel_multiplier = 2;
break;
case SDVO_CLOCK_RATE_MULT_4X:
encoder_pixel_multiplier = 4;
break;
}
WARN(encoder_pixel_multiplier != pipe_config->pixel_multiplier,
"SDVO pixel multiplier mismatch, port: %i, encoder: %i\n",
pipe_config->pixel_multiplier, encoder_pixel_multiplier);
}
static void intel_disable_sdvo(struct intel_encoder *encoder)