[v7,03/12] drm/i915: Add intel_color_lut_equal() to compare hw and sw gamma/degamma lut values
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Message ID 1558964522-7829-4-git-send-email-swati2.sharma@intel.com
State New
Headers show
Series
  • drm/i915: adding state checker for gamma lut values
Related show

Commit Message

Swati Sharma May 27, 2019, 1:41 p.m. UTC
v3: -Rebase
v4: -Renamed intel_compare_color_lut() to intel_color_lut_equal() [Jani]
    -Added the default label above the correct label [Jani]
    -Corrected smatch warn "variable dereferenced before check" [Dan Carpenter]
v5: -Added condition (!blob1 && !blob2) return true [Jani]
    -Called PIPE_CONF_CHECK_COLOR_LUT inside if (!adjust) [Jani]
    -Added #undef PIPE_CONF_CHECK_COLOR_LUT [Jani]
v6: -Added func intel_color_get_bit_precision() to get bit precision for
     gamma and degamma lut readout depending upon platform and
     corresponding to load_luts() [Ankit]
    -Added debug log for color para in intel_dump_pipe_config [Jani]
    -Made patch11 as patch3 [Jani]
v7: -Renamed func intel_color_get_bit_precision() to intel_color_get_gamma_bit_precision()
    -Added separate function/platform for gamma bit precision [Ville]

Signed-off-by: Swati Sharma <swati2.sharma@intel.com>
---
 drivers/gpu/drm/i915/intel_color.c   | 166 +++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_color.h   |   7 ++
 drivers/gpu/drm/i915/intel_display.c |  25 ++++++
 3 files changed, 198 insertions(+)

Patch
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diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
index 50b98ee..e566af5 100644
--- a/drivers/gpu/drm/i915/intel_color.c
+++ b/drivers/gpu/drm/i915/intel_color.c
@@ -1251,6 +1251,172 @@  static int icl_color_check(struct intel_crtc_state *crtc_state)
 	return 0;
 }
 
+static int i9xx_gamma_precision(struct intel_crtc_state *crtc_state)
+{
+	if (!crtc_state->gamma_enable)
+		return 0;
+
+	switch (crtc_state->gamma_mode) {
+		case GAMMA_MODE_MODE_8BIT:
+			return 8;
+		case GAMMA_MODE_MODE_10BIT:
+			return 16;
+		default:
+			MISSING_CASE(crtc_state->gamma_mode);
+			return 0;
+	}
+}
+
+static int chv_gamma_precision(struct intel_crtc_state *crtc_state)
+{
+	if (crtc_state->cgm_mode & CGM_PIPE_MODE_GAMMA)
+		return 10;
+	else
+		return i9xx_gamma_precision(crtc_state);
+}
+
+static int ilk_gamma_precision(struct intel_crtc_state *crtc_state)
+{
+	if (!crtc_state->gamma_enable)
+		return 0;
+
+	if ((crtc_state->csc_mode & CSC_POSITION_BEFORE_GAMMA) == 0)
+		return 0;
+
+	switch (crtc_state->gamma_mode) {
+		case GAMMA_MODE_MODE_8BIT:
+			return 8;
+		case GAMMA_MODE_MODE_10BIT:
+			return 10;
+		default:
+			MISSING_CASE(crtc_state->gamma_mode);
+			return 0;
+	}
+}
+
+static int ivb_gamma_precision(struct intel_crtc_state *crtc_state)
+{
+	if (!crtc_state->gamma_enable)
+		return 0;
+
+	if ((crtc_state->csc_mode & CSC_POSITION_BEFORE_GAMMA) == 0)
+		return 0;
+
+	switch (crtc_state->gamma_mode) {
+		case GAMMA_MODE_MODE_8BIT:
+			return 8;
+		case GAMMA_MODE_MODE_SPLIT:
+		case GAMMA_MODE_MODE_10BIT:
+			return 10;
+		default:
+			MISSING_CASE(crtc_state->gamma_mode);
+			return 0;
+	}
+}
+
+static int glk_gamma_precision(struct intel_crtc_state *crtc_state)
+{
+	if (!crtc_state->gamma_enable)
+		return 0;
+
+	if ((crtc_state->csc_mode & CSC_POSITION_BEFORE_GAMMA) == 0)
+		return 0;
+
+	switch (crtc_state->gamma_mode) {
+		case GAMMA_MODE_MODE_8BIT:
+			return 8;
+		case GAMMA_MODE_MODE_10BIT:
+			return 10;
+		default:
+			MISSING_CASE(crtc_state->gamma_mode);
+			return 0;
+	}
+}
+
+static int icl_gamma_precision(struct intel_crtc_state *crtc_state)
+{
+	if ((crtc_state->gamma_mode & PRE_CSC_GAMMA_ENABLE) == 0)
+		return 0;
+
+	switch (crtc_state->gamma_mode & GAMMA_MODE_MODE_MASK) {
+		case GAMMA_MODE_MODE_8BIT:
+			return 8;
+		case GAMMA_MODE_MODE_10BIT:
+			return 10;
+		default:
+			MISSING_CASE(crtc_state->gamma_mode);
+			return 0;
+	}
+}
+
+int intel_color_get_gamma_bit_precision(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);
+
+	if (HAS_GMCH(dev_priv)) {
+		if (IS_CHERRYVIEW(dev_priv))
+			return chv_gamma_precision(crtc_state);
+		else
+			return i9xx_gamma_precision(crtc_state);
+	} else {
+		if (INTEL_GEN(dev_priv) >= 11)
+			return icl_gamma_precision(crtc_state);
+		else if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv))
+			return glk_gamma_precision(crtc_state);
+		else if (INTEL_GEN(dev_priv) >= 7)
+			return ivb_gamma_precision(crtc_state);
+		else
+			return ilk_gamma_precision(crtc_state);
+	}
+
+	return 0;
+}
+
+static inline bool err_check(struct drm_color_lut *sw_lut,
+	                     struct drm_color_lut *hw_lut, u32 err)
+{
+	 return ((abs((long)hw_lut->red - sw_lut->red)) <= err) &&
+	        ((abs((long)hw_lut->blue - sw_lut->blue)) <= err) &&
+	        ((abs((long)hw_lut->green - sw_lut->green)) <= err);
+}
+
+bool intel_color_lut_equal(struct drm_property_blob *blob1,
+			   struct drm_property_blob *blob2,
+			   u32 bit_precision)
+{
+	struct drm_color_lut *sw_lut, *hw_lut;
+	int sw_lut_size, hw_lut_size, i;
+	u32 err;
+
+	if (!blob1 && !blob2)
+		return true;
+
+	if (!blob1)
+		return true;
+
+	if (!blob2)
+		return false;
+
+	sw_lut_size = drm_color_lut_size(blob1);
+	hw_lut_size = drm_color_lut_size(blob2);
+
+	if (sw_lut_size != hw_lut_size)
+		return false;
+
+	sw_lut = blob1->data;
+	hw_lut = blob2->data;
+
+	err = 0xffff >> bit_precision;
+
+	for (i = 0; i < sw_lut_size; i++) {
+		 if (!err_check(&hw_lut[i], &sw_lut[i], err))
+			return false;
+	}
+
+	return true;
+}
+
 void intel_color_init(struct intel_crtc *crtc)
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
diff --git a/drivers/gpu/drm/i915/intel_color.h b/drivers/gpu/drm/i915/intel_color.h
index 057e8ac..02ea1bc 100644
--- a/drivers/gpu/drm/i915/intel_color.h
+++ b/drivers/gpu/drm/i915/intel_color.h
@@ -6,13 +6,20 @@ 
 #ifndef __INTEL_COLOR_H__
 #define __INTEL_COLOR_H__
 
+#include <linux/types.h>
+
 struct intel_crtc_state;
 struct intel_crtc;
+struct drm_property_blob;
 
 void intel_color_init(struct intel_crtc *crtc);
 int intel_color_check(struct intel_crtc_state *crtc_state);
 void intel_color_commit(const struct intel_crtc_state *crtc_state);
 void intel_color_load_luts(const struct intel_crtc_state *crtc_state);
 void intel_color_get_config(struct intel_crtc_state *crtc_state);
+bool intel_color_lut_equal(struct drm_property_blob *blob1,
+			   struct drm_property_blob *blob2,
+			   u32 bit_precision);
+int intel_color_get_gamma_bit_precision(struct intel_crtc_state *crtc_state);
 
 #endif /* __INTEL_COLOR_H__ */
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3e01028..b3bded6 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11570,6 +11570,16 @@  static void intel_dump_pipe_config(struct intel_crtc *crtc,
 				      drm_rect_width(&state->base.dst),
 				      drm_rect_height(&state->base.dst));
 	}
+
+	if (IS_CHERRYVIEW(dev_priv))
+		DRM_DEBUG_KMS("cgm_mode:%d gamma_mode:%d gamma_enable:%d csc_enable:%d\n",
+			       pipe_config->cgm_mode, pipe_config->gamma_mode, pipe_config->gamma_enable,
+			       pipe_config->csc_enable);
+	else
+		DRM_DEBUG_KMS("csc_mode:%d gamma_mode:%d gamma_enable:%d csc_enable:%d\n",
+			       pipe_config->csc_mode, pipe_config->gamma_mode, pipe_config->gamma_enable,
+			       pipe_config->csc_enable);
+
 }
 
 static bool check_digital_port_conflicts(struct drm_atomic_state *state)
@@ -11947,6 +11957,7 @@  static bool fastboot_enabled(struct drm_i915_private *dev_priv)
 			  bool adjust)
 {
 	bool ret = true;
+	u32 bp_gamma = 0;
 	bool fixup_inherited = adjust &&
 		(current_config->base.mode.private_flags & I915_MODE_FLAG_INHERITED) &&
 		!(pipe_config->base.mode.private_flags & I915_MODE_FLAG_INHERITED);
@@ -12098,6 +12109,15 @@  static bool fastboot_enabled(struct drm_i915_private *dev_priv)
 	} \
 } while (0)
 
+#define PIPE_CONF_CHECK_COLOR_LUT(name, bit_precision) do { \
+	if (!intel_color_lut_equal(current_config->name, \
+				   pipe_config->name, bit_precision)) { \
+		pipe_config_err(adjust, __stringify(name), \
+				"hw_state doesn't match sw_state\n"); \
+		ret = false; \
+	} \
+} while (0)
+
 #define PIPE_CONF_QUIRK(quirk) \
 	((current_config->quirks | pipe_config->quirks) & (quirk))
 
@@ -12193,6 +12213,10 @@  static bool fastboot_enabled(struct drm_i915_private *dev_priv)
 			PIPE_CONF_CHECK_X(csc_mode);
 		PIPE_CONF_CHECK_BOOL(gamma_enable);
 		PIPE_CONF_CHECK_BOOL(csc_enable);
+
+		bp_gamma = intel_color_get_gamma_bit_precision(pipe_config);
+		if (!bp_gamma)
+			PIPE_CONF_CHECK_COLOR_LUT(base.gamma_lut, bp_gamma);
 	}
 
 	PIPE_CONF_CHECK_BOOL(double_wide);
@@ -12255,6 +12279,7 @@  static bool fastboot_enabled(struct drm_i915_private *dev_priv)
 #undef PIPE_CONF_CHECK_FLAGS
 #undef PIPE_CONF_CHECK_CLOCK_FUZZY
 #undef PIPE_CONF_QUIRK
+#undef PIPE_CONF_CHECK_COLOR_LUT
 
 	return ret;
 }