On Wed, 21 Aug 2024, Arun R Murthy <arun.r.murthy@xxxxxxxxx> wrote:
> CRTC properties have been added for enable/disable histogram, reading
> the histogram data and writing the IET data.
> "HISTOGRAM_EN" is the crtc property to enable/disable the global
> histogram and takes a value 0/1 accordingly.
> "Histogram" is a crtc property to read the binary histogram data.
> "Global IET" is a crtc property to write the IET binary LUT data.
>
> v2: Read the histogram blob data before sending uevent (Jani)
>
> Signed-off-by: Arun R Murthy <arun.r.murthy@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/display/intel_atomic.c | 5 +
> drivers/gpu/drm/i915/display/intel_crtc.c | 202 +++++++++++++++++-
> drivers/gpu/drm/i915/display/intel_crtc.h | 5 +
> drivers/gpu/drm/i915/display/intel_display.c | 13 ++
> .../drm/i915/display/intel_display_types.h | 17 ++
> .../gpu/drm/i915/display/intel_histogram.c | 7 +
> 6 files changed, 248 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
> index 76aa10b6f647..693a22089937 100644
> --- a/drivers/gpu/drm/i915/display/intel_atomic.c
> +++ b/drivers/gpu/drm/i915/display/intel_atomic.c
> @@ -246,6 +246,8 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
>
> __drm_atomic_helper_crtc_duplicate_state(crtc, &crtc_state->uapi);
>
> + if (crtc_state->global_iet)
> + drm_property_blob_get(crtc_state->global_iet);
> /* copy color blobs */
> if (crtc_state->hw.degamma_lut)
> drm_property_blob_get(crtc_state->hw.degamma_lut);
> @@ -277,6 +279,7 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
> crtc_state->fb_bits = 0;
> crtc_state->update_planes = 0;
> crtc_state->dsb = NULL;
> + crtc_state->histogram_en_changed = false;
>
> return &crtc_state->uapi;
> }
> @@ -312,6 +315,8 @@ intel_crtc_destroy_state(struct drm_crtc *crtc,
>
> drm_WARN_ON(crtc->dev, crtc_state->dsb);
>
> + if (crtc_state->global_iet)
> + drm_property_blob_put(crtc_state->global_iet);
> __drm_atomic_helper_crtc_destroy_state(&crtc_state->uapi);
> intel_crtc_free_hw_state(crtc_state);
> if (crtc_state->dp_tunnel_ref.tunnel)
> diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c b/drivers/gpu/drm/i915/display/intel_crtc.c
> index 1b578cad2813..24f160359422 100644
> --- a/drivers/gpu/drm/i915/display/intel_crtc.c
> +++ b/drivers/gpu/drm/i915/display/intel_crtc.c
> @@ -10,6 +10,7 @@
> #include <drm/drm_fourcc.h>
> #include <drm/drm_plane.h>
> #include <drm/drm_vblank_work.h>
> +#include <drm/drm_atomic_uapi.h>
>
> #include "i915_vgpu.h"
> #include "i9xx_plane.h"
> @@ -26,6 +27,7 @@
> #include "intel_drrs.h"
> #include "intel_dsi.h"
> #include "intel_fifo_underrun.h"
> +#include "intel_histogram.h"
> #include "intel_pipe_crc.h"
> #include "intel_psr.h"
> #include "intel_sprite.h"
> @@ -201,6 +203,7 @@ static struct intel_crtc *intel_crtc_alloc(void)
> static void intel_crtc_free(struct intel_crtc *crtc)
> {
> intel_crtc_destroy_state(&crtc->base, crtc->base.state);
> + intel_histogram_deinit(crtc);
> kfree(crtc);
> }
>
> @@ -220,6 +223,100 @@ static int intel_crtc_late_register(struct drm_crtc *crtc)
> return 0;
> }
>
> +static int intel_crtc_get_property(struct drm_crtc *crtc,
> + const struct drm_crtc_state *state,
> + struct drm_property *property,
> + uint64_t *val)
> +{
> + struct drm_i915_private *i915 = to_i915(crtc->dev);
> + const struct intel_crtc_state *intel_crtc_state =
> + to_intel_crtc_state(state);
> + struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> +
> + if (property == intel_crtc->histogram_en_property) {
> + *val = intel_crtc_state->histogram_en;
> + } else if (property == intel_crtc->global_iet_property) {
> + *val = (intel_crtc_state->global_iet) ?
> + intel_crtc_state->global_iet->base.id : 0;
> + } else if (property == intel_crtc->histogram_property) {
> + *val = (intel_crtc_state->histogram) ?
> + intel_crtc_state->histogram->base.id : 0;
> + } else {
> + drm_err(&i915->drm,
> + "Unknown property [PROP:%d:%s]\n",
> + property->base.id, property->name);
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int
> +intel_atomic_replace_property_blob_from_id(struct drm_device *dev,
> + struct drm_property_blob **blob,
> + u64 blob_id,
> + ssize_t expected_size,
> + ssize_t expected_elem_size,
> + bool *replaced)
> +{
> + struct drm_property_blob *new_blob = NULL;
> +
> + if (blob_id != 0) {
> + new_blob = drm_property_lookup_blob(dev, blob_id);
> + if (!new_blob)
> + return -EINVAL;
> +
> + if (expected_size > 0 &&
> + new_blob->length != expected_size) {
> + drm_property_blob_put(new_blob);
> + return -EINVAL;
> + }
> + if (expected_elem_size > 0 &&
> + new_blob->length % expected_elem_size != 0) {
> + drm_property_blob_put(new_blob);
> + return -EINVAL;
> + }
> + }
> +
> + *replaced |= drm_property_replace_blob(blob, new_blob);
> + drm_property_blob_put(new_blob);
> +
> + return 0;
> +}
> +
> +static int intel_crtc_set_property(struct drm_crtc *crtc,
> + struct drm_crtc_state *state,
> + struct drm_property *property,
> + u64 val)
> +{
> + struct drm_i915_private *i915 = to_i915(crtc->dev);
> + struct intel_crtc_state *intel_crtc_state =
> + to_intel_crtc_state(state);
> + struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> + bool replaced = false;
> +
> + if (property == intel_crtc->histogram_en_property) {
> + intel_crtc_state->histogram_en = val;
> + intel_crtc_state->histogram_en_changed = true;
> + return 0;
> + }
> +
> + if (property == intel_crtc->global_iet_property) {
> + intel_atomic_replace_property_blob_from_id(crtc->dev,
> + &intel_crtc_state->global_iet,
> + val,
> + sizeof(uint32_t) * HISTOGRAM_IET_LENGTH,
> + -1, &replaced);
> + if (replaced)
> + intel_crtc_state->global_iet_changed = true;
> + return 0;
> + }
> +
> + drm_dbg_atomic(&i915->drm, "Unknown property [PROP:%d:%s]\n",
> + property->base.id, property->name);
> + return -EINVAL;
> +}
> +
> #define INTEL_CRTC_FUNCS \
> .set_config = drm_atomic_helper_set_config, \
> .destroy = intel_crtc_destroy, \
> @@ -229,7 +326,9 @@ static int intel_crtc_late_register(struct drm_crtc *crtc)
> .set_crc_source = intel_crtc_set_crc_source, \
> .verify_crc_source = intel_crtc_verify_crc_source, \
> .get_crc_sources = intel_crtc_get_crc_sources, \
> - .late_register = intel_crtc_late_register
> + .late_register = intel_crtc_late_register, \
> + .atomic_set_property = intel_crtc_set_property, \
> + .atomic_get_property = intel_crtc_get_property
>
> static const struct drm_crtc_funcs bdw_crtc_funcs = {
> INTEL_CRTC_FUNCS,
> @@ -374,6 +473,10 @@ int intel_crtc_init(struct drm_i915_private *dev_priv, enum pipe pipe)
> intel_color_crtc_init(crtc);
> intel_drrs_crtc_init(crtc);
> intel_crtc_crc_init(crtc);
> + intel_histogram_init(crtc);
> +
> + /* Initialize crtc properties */
> + intel_crtc_add_property(crtc);
>
> cpu_latency_qos_add_request(&crtc->vblank_pm_qos, PM_QOS_DEFAULT_VALUE);
>
> @@ -690,3 +793,100 @@ void intel_pipe_update_end(struct intel_atomic_state *state,
> out:
> intel_psr_unlock(new_crtc_state);
> }
> +
> +static const struct drm_prop_enum_list histogram_en_names[] = {
en_names?
> + { INTEL_HISTOGRAM_DISABLE, "Disable" },
> + { INTEL_HISTOGRAM_ENABLE, "Enable" },
> +};
> +
> +/**
> + * intel_attach_histogram_en_property() - add property to enable/disable histogram
> + * @intel_crtc: pointer to the struct intel_crtc on which the global histogram is to
> + * be enabled/disabled
> + *
> + * "HISTOGRAM_EN" is the crtc propety to enable/disable global histogram
There's zero gain in abbreviating enable to _EN.
> + */
> +void intel_attach_histogram_en_property(struct intel_crtc *intel_crtc)
> +{
> + struct drm_crtc *crtc = &intel_crtc->base;
> + struct drm_device *dev = crtc->dev;
> + struct drm_property *prop;
> +
> + prop = intel_crtc->histogram_en_property;
> + if (!prop) {
> + prop = drm_property_create_enum(dev, 0,
> + "HISTOGRAM_EN",
> + histogram_en_names,
> + ARRAY_SIZE(histogram_en_names));
> + if (!prop)
> + return;
> +
> + intel_crtc->histogram_en_property = prop;
> + }
> +
> + drm_object_attach_property(&crtc->base, prop, 0);
> +}
> +
> +/**
> + * intel_attach_global_iet_property() - add property to write Image Enhancement data
> + * @intel_crtc: pointer to the struct intel_crtc on which global histogram is enabled
> + *
> + * "Global IET" is the crtc property to write the Image Enhancement LUT binary data
> + */
> +void intel_attach_global_iet_property(struct intel_crtc *intel_crtc)
> +{
> + struct drm_crtc *crtc = &intel_crtc->base;
> + struct drm_device *dev = crtc->dev;
> + struct drm_property *prop;
> +
> + prop = intel_crtc->global_iet_property;
> + if (!prop) {
> + prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | DRM_MODE_PROP_ATOMIC,
> + "Global IET", 0);
> + if (!prop)
> + return;
> +
> + intel_crtc->global_iet_property = prop;
> + }
> +
> + drm_object_attach_property(&crtc->base, prop, 0);
> +}
> +
> +/**
> + * intel_attach_histogram_property() - crtc property to read the histogram.
> + * @intel_crtc: pointer to the struct intel_crtc on which the global histogram
> + * was enabled.
> + * "Global Histogram" is the crtc property to read the binary histogram data.
> + */
> +void intel_attach_histogram_property(struct intel_crtc *intel_crtc)
> +{
> + struct drm_crtc *crtc = &intel_crtc->base;
> + struct drm_device *dev = crtc->dev;
> + struct drm_property *prop;
> + struct drm_property_blob *blob;
> +
> + prop = intel_crtc->histogram_property;
> + if (!prop) {
> + prop = drm_property_create(dev, DRM_MODE_PROP_BLOB |
> + DRM_MODE_PROP_ATOMIC |
> + DRM_MODE_PROP_IMMUTABLE,
> + "Global Histogram", 0);
> + if (!prop)
> + return;
> +
> + intel_crtc->histogram_property = prop;
> + }
> + blob = drm_property_create_blob(dev, sizeof(uint32_t) * HISTOGRAM_BIN_COUNT, NULL);
> + intel_crtc->config->histogram = blob;
> +
> + drm_object_attach_property(&crtc->base, prop, blob->base.id);
> +}
> +
> +int intel_crtc_add_property(struct intel_crtc *intel_crtc)
> +{
> + intel_attach_histogram_en_property(intel_crtc);
> + intel_attach_histogram_property(intel_crtc);
> + intel_attach_global_iet_property(intel_crtc);
> +
> + return 0;
> +}
> diff --git a/drivers/gpu/drm/i915/display/intel_crtc.h b/drivers/gpu/drm/i915/display/intel_crtc.h
> index b615b7ab5ccd..56c6b7c6037e 100644
> --- a/drivers/gpu/drm/i915/display/intel_crtc.h
> +++ b/drivers/gpu/drm/i915/display/intel_crtc.h
> @@ -7,6 +7,7 @@
> #define _INTEL_CRTC_H_
>
> #include <linux/types.h>
> +#include <drm/drm_crtc.h>
>
> enum i9xx_plane_id;
> enum pipe;
> @@ -49,4 +50,8 @@ void intel_wait_for_vblank_if_active(struct drm_i915_private *i915,
> enum pipe pipe);
> void intel_crtc_wait_for_next_vblank(struct intel_crtc *crtc);
>
> +int intel_crtc_add_property(struct intel_crtc *intel_crtc);
> +void intel_attach_histogram_en_property(struct intel_crtc *intel_crtc);
> +void intel_attach_global_iet_property(struct intel_crtc *intel_crtc);
> +void intel_attach_histogram_property(struct intel_crtc *intel_crtc);
> #endif
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index 9f2a4a854548..20caa952d687 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -94,6 +94,7 @@
> #include "intel_fifo_underrun.h"
> #include "intel_frontbuffer.h"
> #include "intel_hdmi.h"
> +#include "intel_histogram.h"
> #include "intel_hotplug.h"
> #include "intel_link_bw.h"
> #include "intel_lvds.h"
> @@ -4335,6 +4336,10 @@ static int intel_crtc_atomic_check(struct intel_atomic_state *state,
> if (ret)
> return ret;
>
> + /* HISTOGRAM changed */
> + if (crtc_state->histogram_en_changed)
> + return intel_histogram_atomic_check(crtc);
> +
> return 0;
> }
>
> @@ -7512,6 +7517,14 @@ static void intel_atomic_commit_tail(struct intel_atomic_state *state)
> * FIXME get rid of this funny new->old swapping
> */
> old_crtc_state->dsb = fetch_and_zero(&new_crtc_state->dsb);
> +
> + /* Re-Visit: HISTOGRAM related stuff */
> + if (new_crtc_state->histogram_en_changed)
> + intel_histogram_update(crtc,
> + new_crtc_state->histogram_en);
> + if (new_crtc_state->global_iet_changed)
> + intel_histogram_set_iet_lut(crtc,
> + (u32 *)new_crtc_state->global_iet->data);
> }
>
> /* Underruns don't always raise interrupts, so check manually */
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
> index 79d34d6d537d..ddf1cb0ab26d 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -99,6 +99,12 @@ enum intel_broadcast_rgb {
> INTEL_BROADCAST_RGB_LIMITED,
> };
>
> +/* HISTOGRAM property */
> +enum intel_histogram_en_prop {
> + INTEL_HISTOGRAM_PROP_DISABLE,
> + INTEL_HISTOGRAM_PROP_ENABLE,
> +};
> +
This is not a property. This is a regular enum. And it does not belong
in this file.
> struct intel_fb_view {
> /*
> * The remap information used in the remapped and rotated views to
> @@ -1431,6 +1437,13 @@ struct intel_crtc_state {
>
> /* LOBF flag */
> bool has_lobf;
> +
> + /* HISTOGRAM data */
Why all caps?
> + int histogram_en;
> + struct drm_property_blob *global_iet;
> + struct drm_property_blob *histogram;
> + bool global_iet_changed;
> + bool histogram_en_changed;
Please add a substruct for all the histogram stuff to keep it clean.
> };
>
> enum intel_pipe_crc_source {
> @@ -1538,6 +1551,10 @@ struct intel_crtc {
> struct pm_qos_request vblank_pm_qos;
>
> struct intel_histogram *histogram;
> + /* HISTOGRAM properties */
> + struct drm_property *histogram_en_property;
> + struct drm_property *global_iet_property;
> + struct drm_property *histogram_property;
>
> #ifdef CONFIG_DEBUG_FS
> struct intel_pipe_crc pipe_crc;
> diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c b/drivers/gpu/drm/i915/display/intel_histogram.c
> index 83ba826a7a89..ad4f75607ccb 100644
> --- a/drivers/gpu/drm/i915/display/intel_histogram.c
> +++ b/drivers/gpu/drm/i915/display/intel_histogram.c
> @@ -66,6 +66,12 @@ static void intel_histogram_handle_int_work(struct work_struct *work)
> i, histogram->bindata[i]);
> }
>
> + drm_property_replace_global_blob(&i915->drm,
> + &intel_crtc->config->histogram,
> + sizeof(histogram->bindata),
> + histogram->bindata, &intel_crtc->base.base,
> + intel_crtc->histogram_property);
> +
> /* Notify user for Histogram rediness */
> if (kobject_uevent_env(&i915->drm.primary->kdev->kobj, KOBJ_CHANGE,
> histogram_event))
> @@ -193,6 +199,7 @@ static void intel_histogram_disable(struct intel_crtc *intel_crtc)
>
> cancel_delayed_work(&histogram->handle_histogram_int_work);
> histogram->enable = false;
> + intel_crtc->config->histogram_en = false;
> }
>
> int intel_histogram_update(struct intel_crtc *intel_crtc, bool enable)
--
Jani Nikula, Intel
