On Wed, 08 Aug 2012, Paulo Zanoni <przanoni at gmail.com> wrote:
> From: Paulo Zanoni <paulo.r.zanoni at intel.com>
>
> Correctly erase the values previously set and also check for 6pbc and
> 10bpc.
6 *bpc*. But is the 6 or 10 bpc usage below correct anyway, as the spec
says they are not supported by HDMI or DVI? (Either way, the erase part
of the patch is valid.)
BR,
Jani.
>
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
> ---
> drivers/gpu/drm/i915/i915_reg.h | 1 +
> drivers/gpu/drm/i915/intel_ddi.c | 26 ++++++++++++++++++++------
> 2 files changed, 21 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 896b279..f3fafb8 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -4308,6 +4308,7 @@
> #define PIPE_DDI_MODE_SELECT_DP_SST (2<<24)
> #define PIPE_DDI_MODE_SELECT_DP_MST (3<<24)
> #define PIPE_DDI_MODE_SELECT_FDI (4<<24)
> +#define PIPE_DDI_BPC_MASK (7<<20)
> #define PIPE_DDI_BPC_8 (0<<20)
> #define PIPE_DDI_BPC_10 (1<<20)
> #define PIPE_DDI_BPC_6 (2<<20)
> diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> index 1fbd67c..8b38359 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -725,14 +725,28 @@ void intel_ddi_mode_set(struct drm_encoder *encoder,
> /* Enable PIPE_DDI_FUNC_CTL for the pipe to work in HDMI mode */
> temp = I915_READ(DDI_FUNC_CTL(pipe));
> temp &= ~PIPE_DDI_PORT_MASK;
> - temp &= ~PIPE_DDI_BPC_12;
> + temp &= ~PIPE_DDI_BPC_MASK;
> temp &= ~PIPE_DDI_MODE_SELECT_MASK;
> temp &= ~(PIPE_DDI_PVSYNC | PIPE_DDI_PHSYNC);
> - temp |= PIPE_DDI_SELECT_PORT(port) |
> - ((intel_crtc->bpp > 24) ?
> - PIPE_DDI_BPC_12 :
> - PIPE_DDI_BPC_8) |
> - PIPE_DDI_FUNC_ENABLE;
> + temp |= PIPE_DDI_FUNC_ENABLE | PIPE_DDI_SELECT_PORT(port);
> +
> + switch (intel_crtc->bpp) {
> + case 18:
> + temp |= PIPE_DDI_BPC_6;
> + break;
> + case 24:
> + temp |= PIPE_DDI_BPC_8;
> + break;
> + case 30:
> + temp |= PIPE_DDI_BPC_10;
> + break;
> + case 36:
> + temp |= PIPE_DDI_BPC_12;
> + break;
> + default:
> + WARN(1, "%d bpp unsupported by pipe DDI function\n",
> + intel_crtc->bpp);
> + }
>
> if (intel_hdmi->has_hdmi_sink)
> temp |= PIPE_DDI_MODE_SELECT_HDMI;
> --
> 1.7.11.2
>
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