linux-kernel - [PATCH AUTOSEL 5.4 01/30] drm/etnaviv: add missing quirks for GC300

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Date:   Sun, 18 Dec 2022 11:18:06 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Doug Brown <doug@...morgal.com>,
        Christian Gmeiner <christian.gmeiner@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Sasha Levin <sashal@...nel.org>, airlied@...il.com,
        daniel@...ll.ch, etnaviv@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 5.4 01/30] drm/etnaviv: add missing quirks for GC300

From: Doug Brown <doug@...morgal.com>

[ Upstream commit cc7d3fb446a91f24978a6aa59cbb578f92e22242 ]

The GC300's features register doesn't specify that a 2D pipe is
available, and like the GC600, its idle register reports zero bits where
modules aren't present.

Signed-off-by: Doug Brown <doug@...morgal.com>
Reviewed-by: Christian Gmeiner <christian.gmeiner@...il.com>
Signed-off-by: Lucas Stach <l.stach@...gutronix.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index db35736d47af..8c6f9752692d 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -392,6 +392,12 @@ static void etnaviv_hw_identify(struct etnaviv_gpu *gpu)
 	if (gpu->identity.model == chipModel_GC700)
 		gpu->identity.features &= ~chipFeatures_FAST_CLEAR;
 
+	/* These models/revisions don't have the 2D pipe bit */
+	if ((gpu->identity.model == chipModel_GC500 &&
+	     gpu->identity.revision <= 2) ||
+	    gpu->identity.model == chipModel_GC300)
+		gpu->identity.features |= chipFeatures_PIPE_2D;
+
 	if ((gpu->identity.model == chipModel_GC500 &&
 	     gpu->identity.revision < 2) ||
 	    (gpu->identity.model == chipModel_GC300 &&
@@ -425,8 +431,9 @@ static void etnaviv_hw_identify(struct etnaviv_gpu *gpu)
 				gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_5);
 	}
 
-	/* GC600 idle register reports zero bits where modules aren't present */
-	if (gpu->identity.model == chipModel_GC600)
+	/* GC600/300 idle register reports zero bits where modules aren't present */
+	if (gpu->identity.model == chipModel_GC600 ||
+	    gpu->identity.model == chipModel_GC300)
 		gpu->idle_mask = VIVS_HI_IDLE_STATE_TX |
 				 VIVS_HI_IDLE_STATE_RA |
 				 VIVS_HI_IDLE_STATE_SE |
-- 
2.35.1