On Thu, 2019-07-18 at 17:50 +0300, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrj...@linux.intel.com>
>
> On ILK-IVB the pipe colorspace is configured via PIPECONF
> (as opposed to PIPEMISC in BDW+). Let's configure+readout
> that stuff correctly.
>
> Enablling YCbCr 4:4:4 output will now be a simple matter of
Typo: Enablling -> Enabling
> setting crtc_state->output_format appropriately in the encoder
> .compute_config(). However, when we do that we must be
> aware of the fact that YCbCr DP output doesn't seem to work
> on ILK (resulting image is totally garbled), but on SNB+
> it works fine. However HDMI YCbCr output does work correctly
> even on ILK.
>
> Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_display.c | 21
> +++++++++++++++++++-
> drivers/gpu/drm/i915/i915_reg.h | 4 ++++
> 2 files changed, 24 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index bd3ff96c1618..8e98715cd63b 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -9406,9 +9406,19 @@ static void ironlake_set_pipeconf(const struct
> intel_crtc_state *crtc_state)
> else
> val |= PIPECONF_PROGRESSIVE;
>
> + /*
> + * This would end up with an odd purple hue over
> + * the entire display. Make sure we don't do it.
> + */
> + WARN_ON(crtc_state->limited_color_range &&
> + crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB);
> +
> if (crtc_state->limited_color_range)
> val |= PIPECONF_COLOR_RANGE_SELECT;
>
> + if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB)
> + val |= PIPECONF_OUTPUT_COLORSPACE_YUV709;
> +
> val |= PIPECONF_GAMMA_MODE(crtc_state->gamma_mode);
>
> I915_WRITE(PIPECONF(pipe), val);
> @@ -9945,7 +9955,6 @@ static bool ironlake_get_pipe_config(struct
> intel_crtc *crtc,
> if (!wakeref)
> return false;
>
> - pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
> pipe_config->cpu_transcoder = (enum transcoder) crtc->pipe;
> pipe_config->shared_dpll = NULL;
>
> @@ -9974,6 +9983,16 @@ static bool ironlake_get_pipe_config(struct
> intel_crtc *crtc,
> if (tmp & PIPECONF_COLOR_RANGE_SELECT)
> pipe_config->limited_color_range = true;
>
> + switch (tmp & PIPECONF_OUTPUT_COLORSPACE_MASK) {
> + case PIPECONF_OUTPUT_COLORSPACE_YUV601:
> + case PIPECONF_OUTPUT_COLORSPACE_YUV709:
> + pipe_config->output_format =
> INTEL_OUTPUT_FORMAT_YCBCR444;
> + break;
> + default:
> + pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
> + break;
> + }
> +
> pipe_config->gamma_mode = (tmp & PIPECONF_GAMMA_MODE_MASK_ILK)
> >>
> PIPECONF_GAMMA_MODE_SHIFT;
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h
> b/drivers/gpu/drm/i915/i915_reg.h
> index 33d535ae0944..3d33a1e03a45 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -5712,6 +5712,10 @@ enum {
> #define PIPECONF_CXSR_DOWNCLOCK (1 << 16)
> #define PIPECONF_EDP_RR_MODE_SWITCH_VLV (1 << 14)
> #define PIPECONF_COLOR_RANGE_SELECT (1 << 13)
> +#define PIPECONF_OUTPUT_COLORSPACE_MASK (3 << 11) /* ilk-ivb */
> +#define PIPECONF_OUTPUT_COLORSPACE_RGB (0 << 11) /* ilk-ivb */
> +#define PIPECONF_OUTPUT_COLORSPACE_YUV601 (1 << 11) /* ilk-ivb */
> +#define PIPECONF_OUTPUT_COLORSPACE_YUV709 (2 << 11) /* ilk-ivb */
> #define PIPECONF_OUTPUT_COLORSPACE_YUV_HSW (1 << 11) /* hsw only
> */
> #define PIPECONF_BPC_MASK (0x7 << 5)
> #define PIPECONF_8BPC (0 << 5)
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