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Commit b8ed2a4f authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915/tv: Preserve reserved DAC bits during mode-setting 



Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
parent efe8c256

drivers/gpu/drm/i915/i915_reg.h

+1 −0
Original line number Diff line number Diff line
@@ -1481,6 +1481,7 @@ 
# define TV_TEST_MODE_MASK		(7 << 0)



#define TV_DAC			0x68004

# define TV_DAC_SAVE		0x00ffff00

/**

 * Reports that DAC state change logic has reported change (RO).

 *

drivers/gpu/drm/i915/intel_tv.c

+1 −1
Original line number Diff line number Diff line
@@ -1196,7 +1196,7 @@ intel_tv_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, 
		I915_WRITE(TV_V_LUMA_0 + (i<<2), tv_mode->filter_table[j++]);

	for (i = 0; i < 43; i++)

		I915_WRITE(TV_V_CHROMA_0 + (i<<2), tv_mode->filter_table[j++]);

	I915_WRITE(TV_DAC, 0);

	I915_WRITE(TV_DAC, I915_READ(TV_DAC) & TV_DAC_SAVE);

	I915_WRITE(TV_CTL, tv_ctl);

}