On 09/11/2022 15:16, Kalyan Thota wrote:
Add color management support for the crtc provided there are
enough dspps that can be allocated from the catalogue
Signed-off-by: Kalyan Thota <quic_kalyant@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 15 ++++++--
drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h | 6 ++++
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 11 +++---
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 53 +++++++++++++++++++++++++++++
4 files changed, 77 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 4170fbe..6bd3a64 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -18,9 +18,11 @@
#include <drm/drm_flip_work.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_mode.h>
+#include <drm/drm_mode_object.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_rect.h>
#include <drm/drm_vblank.h>
+#include "../../../drm_crtc_internal.h"
If it's internal, it is not supposed to be used by other parties,
including the msm drm. At least a comment why you are including this
file would be helpful.
#include "dpu_kms.h"
#include "dpu_hw_lm.h"
@@ -553,6 +555,17 @@ static void _dpu_crtc_complete_flip(struct drm_crtc *crtc)
spin_unlock_irqrestore(&dev->event_lock, flags);
}
+bool dpu_crtc_has_color_enabled(struct drm_crtc *crtc)
+{
+ u32 ctm_id = crtc->dev->mode_config.ctm_property->base.id;
+ u32 gamma_id = crtc->dev->mode_config.gamma_lut_property->base.id;
+ u32 degamma_id = crtc->dev->mode_config.degamma_lut_property->base.id;
+
+ return !!(drm_mode_obj_find_prop_id(&crtc->base, ctm_id) ||
+ drm_mode_obj_find_prop_id(&crtc->base, gamma_id) ||
+ drm_mode_obj_find_prop_id(&crtc->base, degamma_id));
+}
+
enum dpu_intf_mode dpu_crtc_get_intf_mode(struct drm_crtc *crtc)
{
struct drm_encoder *encoder;
@@ -1604,8 +1617,6 @@ struct drm_crtc *dpu_crtc_init(struct drm_device *dev, struct drm_plane *plane,
drm_crtc_helper_add(crtc, &dpu_crtc_helper_funcs);
- drm_crtc_enable_color_mgmt(crtc, 0, true, 0);
-
/* save user friendly CRTC name for later */
snprintf(dpu_crtc->name, DPU_CRTC_NAME_SIZE, "crtc%u", crtc->base.id);
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h
index 539b68b..8bac395 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h
@@ -300,4 +300,10 @@ static inline enum dpu_crtc_client_type dpu_crtc_get_client_type(
return crtc && crtc->state ? RT_CLIENT : NRT_CLIENT;
}
+/**
+ * dpu_crtc_has_color_enabled - check if the crtc has color management enabled
+ * @crtc: Pointer to drm crtc object
+ */
+bool dpu_crtc_has_color_enabled(struct drm_crtc *crtc);
+
#endif /* _DPU_CRTC_H_ */
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 4c56a16..ebc3f25 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -545,7 +545,8 @@ bool dpu_encoder_use_dsc_merge(struct drm_encoder *drm_enc)
static struct msm_display_topology dpu_encoder_get_topology(
struct dpu_encoder_virt *dpu_enc,
struct dpu_kms *dpu_kms,
- struct drm_display_mode *mode)
+ struct drm_display_mode *mode,
+ struct drm_crtc *crtc)
{
struct msm_display_topology topology = {0};
int i, intf_count = 0;
@@ -573,11 +574,9 @@ static struct msm_display_topology dpu_encoder_get_topology(
else
topology.num_lm = (mode->hdisplay > MAX_HDISPLAY_SPLIT) ? 2 : 1;
- if (dpu_enc->disp_info.intf_type == DRM_MODE_ENCODER_DSI) {
- if (dpu_kms->catalog->dspp &&
- (dpu_kms->catalog->dspp_count >= topology.num_lm))
+ if (dpu_crtc_has_color_enabled(crtc) &&
+ (dpu_kms->catalog->dspp_count >= topology.num_lm))
See the comment to the previous patch. It still applies here.
topology.num_dspp = topology.num_lm;
- }
topology.num_enc = 0;
topology.num_intf = intf_count;
@@ -643,7 +642,7 @@ static int dpu_encoder_virt_atomic_check(
}
}
- topology = dpu_encoder_get_topology(dpu_enc, dpu_kms, adj_mode);
+ topology = dpu_encoder_get_topology(dpu_enc, dpu_kms, adj_mode, crtc_state->crtc);
/* Reserve dynamic resources now. */
if (!ret) {
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 552a89c..47a73fa 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -13,6 +13,7 @@
#include <linux/dma-buf.h>
#include <linux/of_irq.h>
#include <linux/pm_opp.h>
+#include <linux/bitops.h>
#include <drm/drm_crtc.h>
#include <drm/drm_file.h>
@@ -537,6 +538,44 @@ static void dpu_kms_wait_flush(struct msm_kms *kms, unsigned crtc_mask)
dpu_kms_wait_for_commit_done(kms, crtc);
}
+/**
+ * _dpu_kms_possible_dspps - Evaluate how many dspps pairs can be facilitated
+ to enable color features for crtcs.
+ * @dpu_kms: Pointer to dpu kms structure
+ * Returns: count of dspp pairs
+ *
+ * Baring single entry, if atleast 2 dspps are available in the catalogue,
+ * then color can be enabled for that crtc
+ */
+static inline u32 _dpu_kms_possible_dspps(struct dpu_kms *dpu_kms)
+{
+
+ u32 num_dspps = dpu_kms->catalog->dspp_count;
+
+ if (num_dspps > 1)
+ num_dspps =
+ !(num_dspps % 2) ? num_dspps / 2 : (num_dspps - 1) / 2;
Ugh. No. Please spell this clearly rather than using nice math and
ternary operators:
if (num_dspps <= 1)
return num_dspps;
else
return num_dspps / 2;
You see, if num_dspps %2 ! =0, then num_dspps / 2 == (num_dspps_2 - 1) / 2.
+
+ return num_dspps;
+}
+
+static u32 _dpu_kms_attach_color(struct drm_device *dev, u32 enc_mask,
+ u32 num_dspps)
+{
+ struct drm_encoder *encoder;
+ struct drm_crtc *crtc;
+
+ drm_for_each_encoder_mask(encoder, dev, enc_mask) {
+ crtc = drm_crtc_from_index(dev, ffs(encoder->possible_crtcs) - 1);
+ if (num_dspps && crtc) {
+ drm_crtc_enable_color_mgmt(crtc, 0, true, 0);
+ num_dspps--;
Please. You can do this at the time you create the crtc. It would be
much simpler.
+ }
+ }
+
+ return num_dspps;
+}
+
static int _dpu_kms_initialize_dsi(struct drm_device *dev,
struct msm_drm_private *priv,
struct dpu_kms *dpu_kms)
@@ -747,6 +786,8 @@ static int _dpu_kms_drm_obj_init(struct dpu_kms *dpu_kms)
int primary_planes_idx = 0, cursor_planes_idx = 0, i, ret;
int max_crtc_count;
+ u32 num_dspps, primary_enc_mask = 0, external_enc_mask = 0;
+
dev = dpu_kms->dev;
priv = dev->dev_private;
catalog = dpu_kms->catalog;
@@ -796,6 +837,7 @@ static int _dpu_kms_drm_obj_init(struct dpu_kms *dpu_kms)
}
max_crtc_count = min(max_crtc_count, primary_planes_idx);
+ num_dspps = _dpu_kms_possible_dspps(dpu_kms);
/* Create one CRTC per encoder */
encoder = list_first_entry(&(dev)->mode_config.encoder_list,
@@ -808,9 +850,20 @@ static int _dpu_kms_drm_obj_init(struct dpu_kms *dpu_kms)
}
priv->crtcs[priv->num_crtcs++] = crtc;
encoder->possible_crtcs = 1 << drm_crtc_index(crtc);
+
+ if (!dpu_encoder_is_external(encoder) &&
+ !dpu_encoder_is_virtual(encoder))
if (dpu_encoder_internal_output(encoder))
+ primary_enc_mask |= drm_encoder_mask(encoder);
+ else if (dpu_encoder_is_external(encoder))
+ external_enc_mask |= drm_encoder_mask(encoder);
+
encoder = list_next_entry(encoder, head);
}
+ /* Prefer Primary encoders in registering for color support */
+ num_dspps = _dpu_kms_attach_color(dev, primary_enc_mask, num_dspps);
+ num_dspps = _dpu_kms_attach_color(dev, external_enc_mask, num_dspps);
+
return 0;
}
--
With best wishes
Dmitry
