[Intel-gfx] [PATCH 2/7] drm/i915: Preocmpute/readout/check CHV CGM mode

[Shankar, Uma]

>-----Original Message-----
>From: Ville Syrjala [mailto:ville.syrjala at linux.intel.com]
>Sent: Tuesday, February 19, 2019 1:02 AM
>To: intel-gfx at lists.freedesktop.org
>Cc: Shankar, Uma <uma.shankar at intel.com>; Roper, Matthew D
><matthew.d.roper at intel.com>
>Subject: [PATCH 2/7] drm/i915: Preocmpute/readout/check CHV CGM mode

Typo in precompute

>
>From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
>Let's precompte the CGM mode for CHV. And naturally we also read it out and check

Same here.

Rest looks good to me. With the above minor nits fixed.
Reviewed-by: Uma Shankar <uma.shankar at intel.com>

>it.
>
>Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
>---
> drivers/gpu/drm/i915/intel_color.c   | 28 +++++++++++++++++++++-------
> drivers/gpu/drm/i915/intel_display.c |  8 +++++++-
> drivers/gpu/drm/i915/intel_drv.h     |  9 +++++++--
> 3 files changed, 35 insertions(+), 10 deletions(-)
>
>diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
>index d813b9d0f5c0..93428d86510a 100644
>--- a/drivers/gpu/drm/i915/intel_color.c
>+++ b/drivers/gpu/drm/i915/intel_color.c
>@@ -294,7 +294,6 @@ static void cherryview_load_csc_matrix(const struct
>intel_crtc_state *crtc_state
> 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
> 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> 	enum pipe pipe = crtc->pipe;
>-	u32 mode;
>
> 	if (crtc_state->base.ctm) {
> 		const struct drm_color_ctm *ctm = crtc_state->base.ctm->data; @@
>-328,12 +327,7 @@ static void cherryview_load_csc_matrix(const struct
>intel_crtc_state *crtc_state
> 		I915_WRITE(CGM_PIPE_CSC_COEFF8(pipe), coeffs[8]);
> 	}
>
>-	mode = (crtc_state->base.ctm ? CGM_PIPE_MODE_CSC : 0);
>-	if (!crtc_state_is_legacy_gamma(crtc_state)) {
>-		mode |= (crtc_state->base.degamma_lut ?
>CGM_PIPE_MODE_DEGAMMA : 0) |
>-			(crtc_state->base.gamma_lut ? CGM_PIPE_MODE_GAMMA :
>0);
>-	}
>-	I915_WRITE(CGM_PIPE_MODE(pipe), mode);
>+	I915_WRITE(CGM_PIPE_MODE(pipe), crtc_state->cgm_mode);
> }
>
> /* Loads the legacy palette/gamma unit for the CRTC. */ @@ -753,6 +747,23 @@
>static int check_lut_size(const struct drm_property_blob *lut, int expected)
> 	return 0;
> }
>
>+static u32 chv_cgm_mode(const struct intel_crtc_state *crtc_state) {
>+	u32 cgm_mode = 0;
>+
>+	if (crtc_state_is_legacy_gamma(crtc_state))
>+		return 0;
>+
>+	if (crtc_state->base.degamma_lut)
>+		cgm_mode |= CGM_PIPE_MODE_DEGAMMA;
>+	if (crtc_state->base.ctm)
>+		cgm_mode |= CGM_PIPE_MODE_CSC;
>+	if (crtc_state->base.gamma_lut)
>+		cgm_mode |= CGM_PIPE_MODE_GAMMA;
>+
>+	return cgm_mode;
>+}
>+
> int intel_color_check(struct intel_crtc_state *crtc_state)  {
> 	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
>@@ -790,6 +801,9 @@ int intel_color_check(struct intel_crtc_state *crtc_state)
>
> 	crtc_state->csc_mode = 0;
>
>+	if (IS_CHERRYVIEW(dev_priv))
>+		crtc_state->cgm_mode = chv_cgm_mode(crtc_state);
>+
> 	/* Always allow legacy gamma LUT with no further checking. */
> 	if (!crtc_state->gamma_enable ||
> 	    crtc_state_is_legacy_gamma(crtc_state)) { diff --git
>a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
>index 2e4d33634e0c..d2f3174e10d6 100644
>--- a/drivers/gpu/drm/i915/intel_display.c
>+++ b/drivers/gpu/drm/i915/intel_display.c
>@@ -8187,6 +8187,9 @@ static bool i9xx_get_pipe_config(struct intel_crtc *crtc,
> 	pipe_config->gamma_mode = (tmp &
>PIPECONF_GAMMA_MODE_MASK_I9XX) >>
> 		PIPECONF_GAMMA_MODE_SHIFT;
>
>+	if (IS_CHERRYVIEW(dev_priv))
>+		pipe_config->cgm_mode = I915_READ(CGM_PIPE_MODE(crtc-
>>pipe));
>+
> 	i9xx_get_pipe_color_config(pipe_config);
>
> 	if (INTEL_GEN(dev_priv) < 4)
>@@ -12150,7 +12153,10 @@ intel_pipe_config_compare(struct drm_i915_private
>*dev_priv,
> 		PIPE_CONF_CHECK_CLOCK_FUZZY(pixel_rate);
>
> 		PIPE_CONF_CHECK_X(gamma_mode);
>-		PIPE_CONF_CHECK_X(csc_mode);
>+		if (IS_CHERRYVIEW(dev_priv))
>+			PIPE_CONF_CHECK_X(cgm_mode);
>+		else
>+			PIPE_CONF_CHECK_X(csc_mode);
> 		PIPE_CONF_CHECK_BOOL(gamma_enable);
> 		PIPE_CONF_CHECK_BOOL(csc_enable);
> 	}
>diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
>index eec4ed93c335..bbe9cf7e20d6 100644
>--- a/drivers/gpu/drm/i915/intel_drv.h
>+++ b/drivers/gpu/drm/i915/intel_drv.h
>@@ -942,8 +942,13 @@ struct intel_crtc_state {
> 	/* Gamma mode programmed on the pipe */
> 	u32 gamma_mode;
>
>-	/* CSC mode programmed on the pipe */
>-	u32 csc_mode;
>+	union {
>+		/* CSC mode programmed on the pipe */
>+		u32 csc_mode;
>+
>+		/* CHV CGM mode */
>+		u32 cgm_mode;
>+	};
>
> 	/* bitmask of visible planes (enum plane_id) */
> 	u8 active_planes;
>--
>2.19.2