linux-kernel - [PATCH v6 3/5] drm/panfrost: Commonize Mediatek power domain array definitions

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Message-Id: <20250509-mt8370-enable-gpu-v6-3-2833888cb1d3@collabora.com>
Date: Fri, 09 May 2025 12:12:49 +0200
From: Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Boris Brezillon <boris.brezillon@...labora.com>, 
 Steven Price <steven.price@....com>
Cc: kernel@...labora.com, dri-devel@...ts.freedesktop.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, 
 Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>
Subject: [PATCH v6 3/5] drm/panfrost: Commonize Mediatek power domain array
 definitions

In the panfrost driver, the platform data of several Mediatek SoC
declares and uses several different power domains arrays according to
GPU core number present in the SoC:
- mediatek_mt8186_pm_domains (2 cores)
- mediatek_mt8183_pm_domains (3 cores)
- mediatek_mt8192_pm_domains (5 cores)

As they all are fixed arrays, starting with the same entries and the
platform data also has a power domains array length field
(num_pm_domains), they can be replaced by a single array, containing
all entries, if the num_pm_domains field of the platform data is also
set to the matching core number.

So, create a generic power domain array (mediatek_pm_domains) and use
it in the mt8183(b), mt8186, mt8188 and mt8192 platform data instead.

Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>
---
 drivers/gpu/drm/panfrost/panfrost_drv.c | 27 ++++++++++++---------------
 1 file changed, 12 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
index 7b899a9b2120c608e61dab9ca831ab8e907e8139..21b28bef84015793d9dba6b1e585891dc0dfcb6d 100644
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -789,6 +789,8 @@ static const struct panfrost_compatible amlogic_data = {
 	.vendor_quirk = panfrost_gpu_amlogic_quirk,
 };
 
+static const char * const mediatek_pm_domains[] = { "core0", "core1", "core2",
+						    "core3", "core4" };
 /*
  * The old data with two power supplies for MT8183 is here only to
  * keep retro-compatibility with older devicetrees, as DVFS will
@@ -798,48 +800,43 @@ static const struct panfrost_compatible amlogic_data = {
  * coupled regulators instead.
  */
 static const char * const legacy_supplies[] = { "mali", "sram", NULL };
-static const char * const mediatek_mt8183_pm_domains[] = { "core0", "core1", "core2" };
 static const struct panfrost_compatible mediatek_mt8183_data = {
 	.num_supplies = ARRAY_SIZE(legacy_supplies) - 1,
 	.supply_names = legacy_supplies,
-	.num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
-	.pm_domain_names = mediatek_mt8183_pm_domains,
+	.num_pm_domains = 3,
+	.pm_domain_names = mediatek_pm_domains,
 };
 
 static const struct panfrost_compatible mediatek_mt8183_b_data = {
 	.num_supplies = ARRAY_SIZE(default_supplies) - 1,
 	.supply_names = default_supplies,
-	.num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
-	.pm_domain_names = mediatek_mt8183_pm_domains,
+	.num_pm_domains = 3,
+	.pm_domain_names = mediatek_pm_domains,
 	.pm_features = BIT(GPU_PM_CLK_DIS) | BIT(GPU_PM_VREG_OFF),
 };
 
-static const char * const mediatek_mt8186_pm_domains[] = { "core0", "core1" };
 static const struct panfrost_compatible mediatek_mt8186_data = {
 	.num_supplies = ARRAY_SIZE(default_supplies) - 1,
 	.supply_names = default_supplies,
-	.num_pm_domains = ARRAY_SIZE(mediatek_mt8186_pm_domains),
-	.pm_domain_names = mediatek_mt8186_pm_domains,
+	.num_pm_domains = 2,
+	.pm_domain_names = mediatek_pm_domains,
 	.pm_features = BIT(GPU_PM_CLK_DIS) | BIT(GPU_PM_VREG_OFF),
 };
 
-/* MT8188 uses the same power domains and power supplies as MT8183 */
 static const struct panfrost_compatible mediatek_mt8188_data = {
 	.num_supplies = ARRAY_SIZE(default_supplies) - 1,
 	.supply_names = default_supplies,
-	.num_pm_domains = ARRAY_SIZE(mediatek_mt8183_pm_domains),
-	.pm_domain_names = mediatek_mt8183_pm_domains,
+	.num_pm_domains = 3,
+	.pm_domain_names = mediatek_pm_domains,
 	.pm_features = BIT(GPU_PM_CLK_DIS) | BIT(GPU_PM_VREG_OFF),
 	.gpu_quirks = BIT(GPU_QUIRK_FORCE_AARCH64_PGTABLE),
 };
 
-static const char * const mediatek_mt8192_pm_domains[] = { "core0", "core1", "core2",
-							   "core3", "core4" };
 static const struct panfrost_compatible mediatek_mt8192_data = {
 	.num_supplies = ARRAY_SIZE(default_supplies) - 1,
 	.supply_names = default_supplies,
-	.num_pm_domains = ARRAY_SIZE(mediatek_mt8192_pm_domains),
-	.pm_domain_names = mediatek_mt8192_pm_domains,
+	.num_pm_domains = 5,
+	.pm_domain_names = mediatek_pm_domains,
 	.pm_features = BIT(GPU_PM_CLK_DIS) | BIT(GPU_PM_VREG_OFF),
 	.gpu_quirks = BIT(GPU_QUIRK_FORCE_AARCH64_PGTABLE),
 };

-- 
2.49.0