linux-kernel - [PATCH] drm/msm/dpu: check ubwc support before adding compressed formats

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Date: Fri, 28 Jun 2024 16:39:27 -0700
From: Abhinav Kumar <quic_abhinavk@...cinc.com>
To: <freedreno@...ts.freedesktop.org>, 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: <dri-devel@...ts.freedesktop.org>, <quic_jesszhan@...cinc.com>,
        <konrad.dybcio@...aro.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] drm/msm/dpu: check ubwc support before adding compressed formats

On QCM2290 chipset DPU does not support UBWC.

Add a dpu cap to indicate this and do not expose compressed formats
in this case.

changes since RFC:
	- use ubwc enc and dec version of mdss_data instead of catalog
	  to decide if ubwc is supported

Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index 1c3a2657450c..40c4dd2c3139 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -18,6 +18,7 @@
 #include <drm/drm_gem_atomic_helper.h>
 
 #include "msm_drv.h"
+#include "msm_mdss.h"
 #include "dpu_kms.h"
 #include "dpu_formats.h"
 #include "dpu_hw_sspp.h"
@@ -1342,10 +1343,14 @@ void dpu_plane_danger_signal_ctrl(struct drm_plane *plane, bool enable)
 static bool dpu_plane_format_mod_supported(struct drm_plane *plane,
 		uint32_t format, uint64_t modifier)
 {
+	struct dpu_kms *dpu_kms = _dpu_plane_get_kms(plane);
+	bool has_no_ubwc = (dpu_kms->mdss->ubwc_enc_version == 0) &&
+			   (dpu_kms->mdss->ubwc_dec_version == 0);
+
 	if (modifier == DRM_FORMAT_MOD_LINEAR)
 		return true;
 
-	if (modifier == DRM_FORMAT_MOD_QCOM_COMPRESSED)
+	if (modifier == DRM_FORMAT_MOD_QCOM_COMPRESSED && !has_no_ubwc)
 		return dpu_find_format(format, qcom_compressed_supported_formats,
 				ARRAY_SIZE(qcom_compressed_supported_formats));
 
-- 
2.44.0