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| author | Zhao Yakui <yakui.zhao@intel.com> | 2010-01-04 11:29:32 +0300 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2010-01-06 20:40:13 +0300 |
| commit | e5a95eb778690bc864eb330202d2c1b974caaeb4 (patch) | |
| tree | ac6e92b9a488812ab46e1819f184d0d1cdc9b18e /drivers | |
| parent | 8faf3b317471179c02db339aa80955a2e88c036d (diff) | |
| download | linux-e5a95eb778690bc864eb330202d2c1b974caaeb4.tar.xz | |
drm/i915: Select the correct BPC for LVDS on Ironlake
Select the correct BPC for LVDS on Ironlake. If it is 18-bit LVDS panel,
the BPC will be 6. When it is 24-bit LVDS panel, the BPC will 8.
At the same time the BPC will be 8 when the output device is CRT/HDMI/DP.
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 63e8e9fd6793..5e2159b59920 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -2993,6 +2993,18 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc, /* determine panel color depth */ temp = I915_READ(pipeconf_reg); + temp &= ~PIPE_BPC_MASK; + if (is_lvds) { + int lvds_reg = I915_READ(PCH_LVDS); + /* the BPC will be 6 if it is 18-bit LVDS panel */ + if ((lvds_reg & LVDS_A3_POWER_MASK) == LVDS_A3_POWER_UP) + temp |= PIPE_8BPC; + else + temp |= PIPE_6BPC; + } else + temp |= PIPE_8BPC; + I915_WRITE(pipeconf_reg, temp); + I915_READ(pipeconf_reg); switch (temp & PIPE_BPC_MASK) { case PIPE_8BPC: |