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From: Ma Ling <ling.ma@intel.com>
Date: Sun, 31 May 2009 08:58:32 +0000 (+0800)
Subject: drm/i915: Set correct TV detection voltage level override values
X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Fanholt%2Fdrm-intel.git;a=commitdiff_plain;h=cb66c692d1ae257f32dc7f6085cf9cb9f2f6bab8
drm/i915: Set correct TV detection voltage level override values
We detect TV connect status by setting DAC voltage level override
values as 0.7 voltage for DAC_A/B/C. The corresponding 2-bits shold be 0x2,
In order correctly to set last bit as 0, at first we must clean it.
It fixed freedesktop.org bug #21204
Signed-off-by: Ma Ling <ling.ma@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
---
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 99681cf..79df9e9 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -958,15 +958,15 @@
# define DAC_A_1_3_V (0 << 4)
# define DAC_A_1_1_V (1 << 4)
# define DAC_A_0_7_V (2 << 4)
-# define DAC_A_OFF (3 << 4)
+# define DAC_A_MASK (3 << 4)
# define DAC_B_1_3_V (0 << 2)
# define DAC_B_1_1_V (1 << 2)
# define DAC_B_0_7_V (2 << 2)
-# define DAC_B_OFF (3 << 2)
+# define DAC_B_MASK (3 << 2)
# define DAC_C_1_3_V (0 << 0)
# define DAC_C_1_1_V (1 << 0)
# define DAC_C_0_7_V (2 << 0)
-# define DAC_C_OFF (3 << 0)
+# define DAC_C_MASK (3 << 0)
/**
* CSC coefficients are stored in a floating point format with 9 bits of
diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index d2c3298..c7d9ef0 100644
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -1392,6 +1392,9 @@ intel_tv_detect_type (struct drm_crtc *crtc, struct intel_output *intel_output)
tv_ctl &= ~TV_TEST_MODE_MASK;
tv_ctl |= TV_TEST_MODE_MONITOR_DETECT;
tv_dac &= ~TVDAC_SENSE_MASK;
+ tv_dac &= ~DAC_A_MASK;
+ tv_dac &= ~DAC_B_MASK;
+ tv_dac &= ~DAC_C_MASK;
tv_dac |= (TVDAC_STATE_CHG_EN |
TVDAC_A_SENSE_CTL |
TVDAC_B_SENSE_CTL |
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