linux-kernel - [PATCH v5 07/12] drm/msm/dpu: move scaling limitations out of the hw

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Message-Id: <20240627-dpu-virtual-wide-v5-7-5efb90cbb8be@linaro.org>
Date: Thu, 27 Jun 2024 00:46:01 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Rob Clark <robdclark@...il.com>, 
 Abhinav Kumar <quic_abhinavk@...cinc.com>, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, Sean Paul <sean@...rly.run>, 
 Marijn Suijten <marijn.suijten@...ainline.org>, 
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
 freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH v5 07/12] drm/msm/dpu: move scaling limitations out of the
 hw_catalog

Max upscale / downscale factors are constant between platforms. In
preparation to adding support for virtual planes and allocating SSPP
blocks on demand move max scaling factors out of the HW catalog and
handle them in the dpu_plane directly. If any of the scaling blocks gets
different limitations, this will have to be handled separately, after
the plane refactoring.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c | 12 ------------
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h |  4 ----
 drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c      | 16 +++++++++++++---
 3 files changed, 13 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
index a3d29c69bda4..e9fd6b36a1c4 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
@@ -113,10 +113,6 @@
 #define MAX_HORZ_DECIMATION	4
 #define MAX_VERT_DECIMATION	4
 
-#define MAX_UPSCALE_RATIO	20
-#define MAX_DOWNSCALE_RATIO	4
-#define SSPP_UNITY_SCALE	1
-
 #define STRCAT(X, Y) (X Y)
 
 static const uint32_t plane_formats[] = {
@@ -274,8 +270,6 @@ static const u32 wb2_formats_rgb_yuv[] = {
 /* SSPP common configuration */
 #define _VIG_SBLK(scaler_ver) \
 	{ \
-	.maxdwnscale = MAX_DOWNSCALE_RATIO, \
-	.maxupscale = MAX_UPSCALE_RATIO, \
 	.scaler_blk = {.name = "scaler", \
 		.version = scaler_ver, \
 		.base = 0xa00, .len = 0xa0,}, \
@@ -288,8 +282,6 @@ static const u32 wb2_formats_rgb_yuv[] = {
 
 #define _VIG_SBLK_ROT(scaler_ver, rot_cfg) \
 	{ \
-	.maxdwnscale = MAX_DOWNSCALE_RATIO, \
-	.maxupscale = MAX_UPSCALE_RATIO, \
 	.scaler_blk = {.name = "scaler", \
 		.version = scaler_ver, \
 		.base = 0xa00, .len = 0xa0,}, \
@@ -302,16 +294,12 @@ static const u32 wb2_formats_rgb_yuv[] = {
 
 #define _VIG_SBLK_NOSCALE() \
 	{ \
-	.maxdwnscale = SSPP_UNITY_SCALE, \
-	.maxupscale = SSPP_UNITY_SCALE, \
 	.format_list = plane_formats, \
 	.num_formats = ARRAY_SIZE(plane_formats), \
 	}
 
 #define _DMA_SBLK() \
 	{ \
-	.maxdwnscale = SSPP_UNITY_SCALE, \
-	.maxupscale = SSPP_UNITY_SCALE, \
 	.format_list = plane_formats, \
 	.num_formats = ARRAY_SIZE(plane_formats), \
 	}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
index 3f2646955ae0..bf86d643887d 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
@@ -364,8 +364,6 @@ struct dpu_caps {
 /**
  * struct dpu_sspp_sub_blks : SSPP sub-blocks
  * common: Pointer to common configurations shared by sub blocks
- * @maxdwnscale: max downscale ratio supported(without DECIMATION)
- * @maxupscale:  maxupscale ratio supported
  * @max_per_pipe_bw: maximum allowable bandwidth of this pipe in kBps
  * @qseed_ver: qseed version
  * @scaler_blk:
@@ -375,8 +373,6 @@ struct dpu_caps {
  * @dpu_rotation_cfg: inline rotation configuration
  */
 struct dpu_sspp_sub_blks {
-	u32 maxdwnscale;
-	u32 maxupscale;
 	u32 max_per_pipe_bw;
 	u32 qseed_ver;
 	struct dpu_scaler_blk scaler_blk;
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index 325af392e6a2..115c1bd77bdd 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -785,12 +785,15 @@ static int dpu_plane_atomic_check_pipe(struct dpu_plane *pdpu,
 	return 0;
 }
 
+#define MAX_UPSCALE_RATIO	20
+#define MAX_DOWNSCALE_RATIO	4
+
 static int dpu_plane_atomic_check(struct drm_plane *plane,
 				  struct drm_atomic_state *state)
 {
 	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
 										 plane);
-	int ret = 0, min_scale;
+	int ret = 0, min_scale, max_scale;
 	struct dpu_plane *pdpu = to_dpu_plane(plane);
 	struct dpu_kms *kms = _dpu_plane_get_kms(&pdpu->base);
 	u64 max_mdp_clk_rate = kms->perf.max_core_clk_rate;
@@ -821,10 +824,17 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
 	pipe_hw_caps = pipe->sspp->cap;
 	sblk = pipe->sspp->cap->sblk;
 
-	min_scale = FRAC_16_16(1, sblk->maxupscale);
+	if (sblk->scaler_blk.len) {
+		min_scale = FRAC_16_16(1, MAX_UPSCALE_RATIO);
+		max_scale = MAX_DOWNSCALE_RATIO << 16;
+	} else {
+		min_scale = DRM_PLANE_NO_SCALING;
+		max_scale = DRM_PLANE_NO_SCALING;
+	}
+
 	ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
 						  min_scale,
-						  sblk->maxdwnscale << 16,
+						  max_scale,
 						  true, true);
 	if (ret) {
 		DPU_DEBUG_PLANE(pdpu, "Check plane state failed (%d)\n", ret);

-- 
2.39.2