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<pre>On 14-May-19 9:40 PM, Ville Syrjälä wrote:</pre>
</div>
<blockquote type="cite" cite="mid:20190514161024.GC24299@intel.com">
<pre class="moz-quote-pre" wrap="">On Tue, May 14, 2019 at 03:13:21PM +0530, Swati Sharma wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">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]
I could think of adding intel_color_get_bit_precision() to be the way
to get away with bit precision problem for degamma and gamma (its like a table
having hard coded values depening on gamma_mode).
If anybody could think of better way then this then please guide.
Signed-off-by: Swati Sharma <a class="moz-txt-link-rfc2396E" href="mailto:swati2.sharma@intel.com"><swati2.sharma@intel.com></a>
---
drivers/gpu/drm/i915/intel_color.c | 93 ++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_color.h | 7 +++
drivers/gpu/drm/i915/intel_display.c | 24 ++++++++++
3 files changed, 124 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
index 50b98ee..1e60369 100644
--- a/drivers/gpu/drm/i915/intel_color.c
+++ b/drivers/gpu/drm/i915/intel_color.c
@@ -1251,6 +1251,99 @@ static int icl_color_check(struct intel_crtc_state *crtc_state)
return 0;
}
+void intel_color_get_bit_precision(struct intel_crtc_state *crtc_state, int *bp_gamma)
+{
+ 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)) {
+ if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT) {
+ *bp_gamma = 8;
+ return;
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">
Functions can actually return values.
Not sure I particularly like this function though. We can't fit
the gamma vs. degamm stuff in here neatly. I think per-platform
stuff to determine the precision is required to make this sane.
And it should probably got into intel_color.c to keep things
neatly contained.
Something along the lines of:
i9xx_gamma_precision()
{
if (!gamma_enable)
return 0;
switch (gamma_mode) {
case GAMMA_MODE_MODE_8BIT:
return 8;
case GAMMA_MODE_MODE_10BIT:
return 16;
}
}
chv_gamma_precision()
{
if (cgm_mode & CGM_PIPE_MODE_GAMMA)
return 10;
else
return i9xx_gamma_precision();
}
chv_degamma_precision(crtc_state)
{
if (cgm_mode & CGM_PIPE_MODE_DEGAMMA)
return 14;
else
return 0
}
ilk_gamma_precision()
{
if (!gamma_enable)
return 0;
if ((csc_mode & CSC_POSITION_BEFORE_GAMMA) == 0)
return 0;
switch (gamma_mode) {
case GAMMA_MODE_MODE_8BIT:
return 8;
case GAMMA_MODE_MODE_10BIT:
return 10;
}
}
ilk_degamma_precision()
{
if (!gamma_enable)
return 0;
if ((csc_mode & CSC_POSITION_BEFORE_GAMMA) != 0)
return 0;
switch (gamma_mode) {
case GAMMA_MODE_MODE_8BIT:
return 8;
case GAMMA_MODE_MODE_10BIT:
return 10;
}
}
... extend to ivb, glk, and icl variants too.</pre>
</blockquote>
<pre>ok..will do like this. thanks! sorry i was on leave.
2 queries:
(1) Since intel_color_get_bit_precision() will be used to set bit precision for gamma and degamma both, it will
return multiple values..should i return values as struct? or sending as pointer is ok?
if (HAS_GMCH(dev_priv)) {
if (IS_CHERRYVIEW(dev_priv))
*bp_gamma = chv_gamma_precision(crtc_state);
(2) (or) if this method is not fine, should we have function ptr for the same?
Please suggest the best method?
</pre>
<blockquote type="cite" cite="mid:20190514161024.GC24299@intel.com">
<pre class="moz-quote-pre" wrap="">
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">+ }
+ if (crtc_state->cgm_mode == CGM_PIPE_MODE_GAMMA)
+ *bp_gamma = 10;
+ } else if (INTEL_GEN(dev_priv) >= 4) {
+ if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT)
+ *bp_gamma = 8;
+ else
+ *bp_gamma = 16;
+ } else {
+ *bp_gamma = 8;
+ }
+ } else {
+ if (INTEL_GEN(dev_priv) >= 11) {
+ if ((crtc_state->gamma_mode & GAMMA_MODE_MODE_MASK) ==
+ GAMMA_MODE_MODE_8BIT)
+ *bp_gamma = 8;
+ else
+ *bp_gamma = 10;
+ } else if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv)) {
+ if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT)
+ *bp_gamma = 8;
+ else
+ *bp_gamma = 10;
+ } else if (INTEL_GEN(dev_priv) >= 7) {
+ if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT)
+ *bp_gamma = 8;
+ else if (crtc_state->gamma_mode == GAMMA_MODE_MODE_SPLIT)
+ *bp_gamma = 10;
+ else
+ *bp_gamma = 10;
+ } else {
+ if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT)
+ *bp_gamma = 8;
+ else
+ *bp_gamma = 10;
+ }
+ }
+}
+
+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..f2872d3 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);
+void intel_color_get_bit_precision(struct intel_crtc_state *crtc_state, int *bp_gamma);
#endif /* __INTEL_COLOR_H__ */
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3e01028..46985c15 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 +12213,9 @@ 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);
+
+ intel_color_get_bit_precision(pipe_config, &bp_gamma);
+ PIPE_CONF_CHECK_COLOR_LUT(base.gamma_lut, bp_gamma);
}
PIPE_CONF_CHECK_BOOL(double_wide);
@@ -12255,6 +12278,7 @@ 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;
}
--
1.9.1
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">
</pre>
</blockquote>
<p><br>
</p>
<pre class="moz-signature" cols="72">--
~Swati Sharma
</pre>
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