On Tue, May 14, 2019 at 03:13:21PM +0530, Swati Sharma wrote:
> 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 <swati2.sharma@xxxxxxxxx>
> ---
> 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;
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.
> + }
> + 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
--
Ville Syrjälä
Intel
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