diff mbox series

[v4,12/32] drm/amd/display: add CRTC gamma TF driver-specific property

Message ID 20231005171527.203657-13-mwen@igalia.com (mailing list archive)
State New, archived
Headers show
Series drm/amd/display: add AMD driver-specific properties for color mgmt | expand

Commit Message

Melissa Wen Oct. 5, 2023, 5:15 p.m. UTC 
Add AMD pre-defined transfer function property to default DRM CRTC gamma
to convert to wire encoding with or without a user gamma LUT. There is
no post-blending regamma ROM for pre-defined TF. When setting Gamma TF
(!= Identity) and LUT at the same time, the color module will combine
the pre-defined TF and the custom LUT values into the LUT that's
actually programmed.

v2:
- enable CRTC prop in the end of driver-specific prop sequence
- define inverse EOTFs as supported regamma TFs
- reword driver-specific function doc to remove shaper/3D LUT

v3:
- spell out TF+LUT behavior in the commit and comments (Harry)

Co-developed-by: Joshua Ashton <joshua@froggi.es>
Signed-off-by: Joshua Ashton <joshua@froggi.es>
Signed-off-by: Melissa Wen <mwen@igalia.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h      |  7 ++
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |  8 +++
 .../amd/display/amdgpu_dm/amdgpu_dm_color.c   |  7 ++
 .../amd/display/amdgpu_dm/amdgpu_dm_crtc.c    | 72 +++++++++++++++++++
 4 files changed, 94 insertions(+)

Comments

Harry Wentland Nov. 15, 2023, 6:27 p.m. UTC | #1 
On 2023-10-05 13:15, Melissa Wen wrote:
> Add AMD pre-defined transfer function property to default DRM CRTC gamma
> to convert to wire encoding with or without a user gamma LUT. There is
> no post-blending regamma ROM for pre-defined TF. When setting Gamma TF
> (!= Identity) and LUT at the same time, the color module will combine
> the pre-defined TF and the custom LUT values into the LUT that's
> actually programmed.
> 
> v2:
> - enable CRTC prop in the end of driver-specific prop sequence
> - define inverse EOTFs as supported regamma TFs
> - reword driver-specific function doc to remove shaper/3D LUT
> 
> v3:
> - spell out TF+LUT behavior in the commit and comments (Harry)
> 
> Co-developed-by: Joshua Ashton <joshua@froggi.es>
> Signed-off-by: Joshua Ashton <joshua@froggi.es>
> Signed-off-by: Melissa Wen <mwen@igalia.com>

Reviewed-by: Harry Wentland <harry.wentland@amd.com>

Harry

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h      |  7 ++
>  .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |  8 +++
>  .../amd/display/amdgpu_dm/amdgpu_dm_color.c   |  7 ++
>  .../amd/display/amdgpu_dm/amdgpu_dm_crtc.c    | 72 +++++++++++++++++++
>  4 files changed, 94 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
> index dee35d208493..071cc10bfd90 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
> @@ -424,6 +424,13 @@ struct amdgpu_mode_info {
>  	 * from a combination of pre-defined TF and the custom 1D LUT).
>  	 */
>  	struct drm_property *plane_blend_tf_property;
> +	/* @regamma_tf_property: Transfer function for CRTC regamma
> +	 * (post-blending). Possible values are defined by `enum
> +	 * amdgpu_transfer_function`. There is no regamma ROM, but we can use
> +	 * AMD color modules to program LUT parameters from predefined TF (or
> +	 * from a combination of pre-defined TF and the custom 1D LUT).
> +	 */
> +	struct drm_property *regamma_tf_property;
>  };
>  
>  #define AMDGPU_MAX_BL_LEVEL 0xFF
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
> index 1b96c742d747..c138457ff12e 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
> @@ -836,6 +836,14 @@ struct dm_crtc_state {
>  	struct dc_info_packet vrr_infopacket;
>  
>  	int abm_level;
> +
> +        /**
> +	 * @regamma_tf:
> +	 *
> +	 * Pre-defined transfer function for converting internal FB -> wire
> +	 * encoding.
> +	 */
> +	enum amdgpu_transfer_function regamma_tf;
>  };
>  
>  #define to_dm_crtc_state(x) container_of(x, struct dm_crtc_state, base)
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
> index 82c554662faa..2ecfa0e886e8 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
> @@ -294,6 +294,13 @@ amdgpu_dm_create_color_properties(struct amdgpu_device *adev)
>  		return -ENOMEM;
>  	adev->mode_info.plane_blend_tf_property = prop;
>  
> +	prop = amdgpu_create_tf_property(adev_to_drm(adev),
> +					 "AMD_CRTC_REGAMMA_TF",
> +					 amdgpu_inv_eotf);
> +	if (!prop)
> +		return -ENOMEM;
> +	adev->mode_info.regamma_tf_property = prop;
> +
>  	return 0;
>  }
>  #endif
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
> index 440fc0869a34..d746f0aa0f11 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
> @@ -253,6 +253,7 @@ static struct drm_crtc_state *dm_crtc_duplicate_state(struct drm_crtc *crtc)
>  	state->freesync_config = cur->freesync_config;
>  	state->cm_has_degamma = cur->cm_has_degamma;
>  	state->cm_is_degamma_srgb = cur->cm_is_degamma_srgb;
> +	state->regamma_tf = cur->regamma_tf;
>  	state->crc_skip_count = cur->crc_skip_count;
>  	state->mpo_requested = cur->mpo_requested;
>  	/* TODO Duplicate dc_stream after objects are stream object is flattened */
> @@ -289,6 +290,70 @@ static int amdgpu_dm_crtc_late_register(struct drm_crtc *crtc)
>  }
>  #endif
>  
> +#ifdef AMD_PRIVATE_COLOR
> +/**
> + * drm_crtc_additional_color_mgmt - enable additional color properties
> + * @crtc: DRM CRTC
> + *
> + * This function lets the driver enable post-blending CRTC regamma transfer
> + * function property in addition to DRM CRTC gamma LUT. Default value means
> + * linear transfer function, which is the default CRTC gamma LUT behaviour
> + * without this property.
> + */
> +static void
> +dm_crtc_additional_color_mgmt(struct drm_crtc *crtc)
> +{
> +	struct amdgpu_device *adev = drm_to_adev(crtc->dev);
> +
> +	if(adev->dm.dc->caps.color.mpc.ogam_ram)
> +		drm_object_attach_property(&crtc->base,
> +					   adev->mode_info.regamma_tf_property,
> +					   AMDGPU_TRANSFER_FUNCTION_DEFAULT);
> +}
> +
> +static int
> +amdgpu_dm_atomic_crtc_set_property(struct drm_crtc *crtc,
> +				   struct drm_crtc_state *state,
> +				   struct drm_property *property,
> +				   uint64_t val)
> +{
> +	struct amdgpu_device *adev = drm_to_adev(crtc->dev);
> +	struct dm_crtc_state *acrtc_state = to_dm_crtc_state(state);
> +
> +	if (property == adev->mode_info.regamma_tf_property) {
> +		if (acrtc_state->regamma_tf != val) {
> +			acrtc_state->regamma_tf = val;
> +			acrtc_state->base.color_mgmt_changed |= 1;
> +		}
> +	} else {
> +		drm_dbg_atomic(crtc->dev,
> +			       "[CRTC:%d:%s] unknown property [PROP:%d:%s]]\n",
> +			       crtc->base.id, crtc->name,
> +			       property->base.id, property->name);
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
> +static int
> +amdgpu_dm_atomic_crtc_get_property(struct drm_crtc *crtc,
> +				   const struct drm_crtc_state *state,
> +				   struct drm_property *property,
> +				   uint64_t *val)
> +{
> +	struct amdgpu_device *adev = drm_to_adev(crtc->dev);
> +	struct dm_crtc_state *acrtc_state = to_dm_crtc_state(state);
> +
> +	if (property == adev->mode_info.regamma_tf_property)
> +		*val = acrtc_state->regamma_tf;
> +	else
> +		return -EINVAL;
> +
> +	return 0;
> +}
> +#endif
> +
>  /* Implemented only the options currently available for the driver */
>  static const struct drm_crtc_funcs amdgpu_dm_crtc_funcs = {
>  	.reset = dm_crtc_reset_state,
> @@ -307,6 +372,10 @@ static const struct drm_crtc_funcs amdgpu_dm_crtc_funcs = {
>  #if defined(CONFIG_DEBUG_FS)
>  	.late_register = amdgpu_dm_crtc_late_register,
>  #endif
> +#ifdef AMD_PRIVATE_COLOR
> +	.atomic_set_property = amdgpu_dm_atomic_crtc_set_property,
> +	.atomic_get_property = amdgpu_dm_atomic_crtc_get_property,
> +#endif
>  };
>  
>  static void dm_crtc_helper_disable(struct drm_crtc *crtc)
> @@ -470,6 +539,9 @@ int amdgpu_dm_crtc_init(struct amdgpu_display_manager *dm,
>  
>  	drm_mode_crtc_set_gamma_size(&acrtc->base, MAX_COLOR_LEGACY_LUT_ENTRIES);
>  
> +#ifdef AMD_PRIVATE_COLOR
> +	dm_crtc_additional_color_mgmt(&acrtc->base);
> +#endif
>  	return 0;
>  
>  fail:
diff mbox series

Patch

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
index dee35d208493..071cc10bfd90 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
@@ -424,6 +424,13 @@  struct amdgpu_mode_info {
 	 * from a combination of pre-defined TF and the custom 1D LUT).
 	 */
 	struct drm_property *plane_blend_tf_property;
+	/* @regamma_tf_property: Transfer function for CRTC regamma
+	 * (post-blending). Possible values are defined by `enum
+	 * amdgpu_transfer_function`. There is no regamma ROM, but we can use
+	 * AMD color modules to program LUT parameters from predefined TF (or
+	 * from a combination of pre-defined TF and the custom 1D LUT).
+	 */
+	struct drm_property *regamma_tf_property;
 };
 
 #define AMDGPU_MAX_BL_LEVEL 0xFF
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
index 1b96c742d747..c138457ff12e 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -836,6 +836,14 @@  struct dm_crtc_state {
 	struct dc_info_packet vrr_infopacket;
 
 	int abm_level;
+
+        /**
+	 * @regamma_tf:
+	 *
+	 * Pre-defined transfer function for converting internal FB -> wire
+	 * encoding.
+	 */
+	enum amdgpu_transfer_function regamma_tf;
 };
 
 #define to_dm_crtc_state(x) container_of(x, struct dm_crtc_state, base)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
index 82c554662faa..2ecfa0e886e8 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
@@ -294,6 +294,13 @@  amdgpu_dm_create_color_properties(struct amdgpu_device *adev)
 		return -ENOMEM;
 	adev->mode_info.plane_blend_tf_property = prop;
 
+	prop = amdgpu_create_tf_property(adev_to_drm(adev),
+					 "AMD_CRTC_REGAMMA_TF",
+					 amdgpu_inv_eotf);
+	if (!prop)
+		return -ENOMEM;
+	adev->mode_info.regamma_tf_property = prop;
+
 	return 0;
 }
 #endif
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
index 440fc0869a34..d746f0aa0f11 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
@@ -253,6 +253,7 @@  static struct drm_crtc_state *dm_crtc_duplicate_state(struct drm_crtc *crtc)
 	state->freesync_config = cur->freesync_config;
 	state->cm_has_degamma = cur->cm_has_degamma;
 	state->cm_is_degamma_srgb = cur->cm_is_degamma_srgb;
+	state->regamma_tf = cur->regamma_tf;
 	state->crc_skip_count = cur->crc_skip_count;
 	state->mpo_requested = cur->mpo_requested;
 	/* TODO Duplicate dc_stream after objects are stream object is flattened */
@@ -289,6 +290,70 @@  static int amdgpu_dm_crtc_late_register(struct drm_crtc *crtc)
 }
 #endif
 
+#ifdef AMD_PRIVATE_COLOR
+/**
+ * drm_crtc_additional_color_mgmt - enable additional color properties
+ * @crtc: DRM CRTC
+ *
+ * This function lets the driver enable post-blending CRTC regamma transfer
+ * function property in addition to DRM CRTC gamma LUT. Default value means
+ * linear transfer function, which is the default CRTC gamma LUT behaviour
+ * without this property.
+ */
+static void
+dm_crtc_additional_color_mgmt(struct drm_crtc *crtc)
+{
+	struct amdgpu_device *adev = drm_to_adev(crtc->dev);
+
+	if(adev->dm.dc->caps.color.mpc.ogam_ram)
+		drm_object_attach_property(&crtc->base,
+					   adev->mode_info.regamma_tf_property,
+					   AMDGPU_TRANSFER_FUNCTION_DEFAULT);
+}
+
+static int
+amdgpu_dm_atomic_crtc_set_property(struct drm_crtc *crtc,
+				   struct drm_crtc_state *state,
+				   struct drm_property *property,
+				   uint64_t val)
+{
+	struct amdgpu_device *adev = drm_to_adev(crtc->dev);
+	struct dm_crtc_state *acrtc_state = to_dm_crtc_state(state);
+
+	if (property == adev->mode_info.regamma_tf_property) {
+		if (acrtc_state->regamma_tf != val) {
+			acrtc_state->regamma_tf = val;
+			acrtc_state->base.color_mgmt_changed |= 1;
+		}
+	} else {
+		drm_dbg_atomic(crtc->dev,
+			       "[CRTC:%d:%s] unknown property [PROP:%d:%s]]\n",
+			       crtc->base.id, crtc->name,
+			       property->base.id, property->name);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int
+amdgpu_dm_atomic_crtc_get_property(struct drm_crtc *crtc,
+				   const struct drm_crtc_state *state,
+				   struct drm_property *property,
+				   uint64_t *val)
+{
+	struct amdgpu_device *adev = drm_to_adev(crtc->dev);
+	struct dm_crtc_state *acrtc_state = to_dm_crtc_state(state);
+
+	if (property == adev->mode_info.regamma_tf_property)
+		*val = acrtc_state->regamma_tf;
+	else
+		return -EINVAL;
+
+	return 0;
+}
+#endif
+
 /* Implemented only the options currently available for the driver */
 static const struct drm_crtc_funcs amdgpu_dm_crtc_funcs = {
 	.reset = dm_crtc_reset_state,
@@ -307,6 +372,10 @@  static const struct drm_crtc_funcs amdgpu_dm_crtc_funcs = {
 #if defined(CONFIG_DEBUG_FS)
 	.late_register = amdgpu_dm_crtc_late_register,
 #endif
+#ifdef AMD_PRIVATE_COLOR
+	.atomic_set_property = amdgpu_dm_atomic_crtc_set_property,
+	.atomic_get_property = amdgpu_dm_atomic_crtc_get_property,
+#endif
 };
 
 static void dm_crtc_helper_disable(struct drm_crtc *crtc)
@@ -470,6 +539,9 @@  int amdgpu_dm_crtc_init(struct amdgpu_display_manager *dm,
 
 	drm_mode_crtc_set_gamma_size(&acrtc->base, MAX_COLOR_LEGACY_LUT_ENTRIES);
 
+#ifdef AMD_PRIVATE_COLOR
+	dm_crtc_additional_color_mgmt(&acrtc->base);
+#endif
 	return 0;
 
 fail: