linux-kernel - [PATCH v2 3/6] drm/etnaviv: Add a new function to emit a series of states to cmd stream

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Message-ID: <20250618204400.21808-4-gert.wollny@collabora.com>
Date: Wed, 18 Jun 2025 22:43:31 +0200
From: Gert Wollny <gert.wollny@...labora.com>
To: Lucas Stach <l.stach@...gutronix.de>,
	Russell King <linux+etnaviv@...linux.org.uk>,
	Christian Gmeiner <christian.gmeiner@...il.com>
Cc: etnaviv@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Gert Wollny <gert.wollny@...labora.com>
Subject: [PATCH v2 3/6] drm/etnaviv: Add a new function to emit a series of states to cmd stream

v2: fix formatting and remove superfluous masking (Lucas)

Signed-off-by: Gert Wollny <gert.wollny@...labora.com>
---
 drivers/gpu/drm/etnaviv/etnaviv_buffer.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_buffer.h b/drivers/gpu/drm/etnaviv/etnaviv_buffer.h
index caf820d91ef5..842a7ca55c44 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_buffer.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_buffer.h
@@ -41,6 +41,19 @@ static inline void CMD_LOAD_STATE(struct etnaviv_cmdbuf *buffer,
 	OUT(buffer, value);
 }
 
+static inline void CMD_LOAD_STATES_START(struct etnaviv_cmdbuf *buffer,
+					u32 reg, u32 nvalues)
+{
+	u32 index = reg >> VIV_FE_LOAD_STATE_HEADER_OFFSET__SHR;
+
+	buffer->user_size = ALIGN(buffer->user_size, 8);
+
+	/* write a register via cmd stream */
+	OUT(buffer, VIV_FE_LOAD_STATE_HEADER_OP_LOAD_STATE |
+	            VIV_FE_LOAD_STATE_HEADER_OFFSET(index) |
+	            VIV_FE_LOAD_STATE_HEADER_COUNT(nvalues));
+}
+
 static inline void CMD_END(struct etnaviv_cmdbuf *buffer)
 {
 	buffer->user_size = ALIGN(buffer->user_size, 8);
-- 
2.49.0