From patchwork Wed Mar 13 17:45:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Louis Chauvet X-Patchwork-Id: 13591667 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D1993C54E67 for ; Wed, 13 Mar 2024 17:45:39 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 816EB10F738; Wed, 13 Mar 2024 17:45:37 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=bootlin.com header.i=@bootlin.com header.b="FW86Axai"; dkim-atps=neutral Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [217.70.183.194]) by gabe.freedesktop.org (Postfix) with ESMTPS id AE66210F6C2 for ; Wed, 13 Mar 2024 17:45:34 +0000 (UTC) Received: by mail.gandi.net (Postfix) with ESMTPSA id 91CA14000F; Wed, 13 Mar 2024 17:45:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1710351933; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=J5eNM0DhAMIgKT/kkCgWrA9s8H4fNzBpCgQ7okrYfr0=; b=FW86Axai64pv208U0YOs8bwxLfeRvCLXuYQaGc+0j4vcP5PYIi1LnxQW5mLQ/lhIUgY4ZF jZBCgpE/xUmgf/477wgcoiPYgbKmbpgp00ntlhoFZqVJaV5pqjRbjUC5PvfuCjlcUZNEOH Uqbq8S5dpWKojQeMtTAQBS2+IdbOYvEFyHQR7JZ24NiKkMEuf+Xmh1x5GDADFFL3I22HFA zOQ9mA9k6JGGSeK1j7zUORm+uZLa2Q9UcS7QUFUK7X/ipN7Py1l6dB3J1iLIB8AA1fvSY4 VsECNzRZEPGOG0mcxRgXGCztUoW9IEMRBf9AuiM4foFFnprUFRgxv97OFTNdEg== From: Louis Chauvet Date: Wed, 13 Mar 2024 18:45:00 +0100 Subject: [PATCH v5 06/16] drm/vkms: Use const for input pointers in pixel_read an pixel_write functions MIME-Version: 1.0 Message-Id: <20240313-yuv-v5-6-e610cbd03f52@bootlin.com> References: <20240313-yuv-v5-0-e610cbd03f52@bootlin.com> In-Reply-To: <20240313-yuv-v5-0-e610cbd03f52@bootlin.com> To: Rodrigo Siqueira , Melissa Wen , =?utf-8?q?Ma=C3=ADra_Canal?= , Haneen Mohammed , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , arthurgrillo@riseup.net, Jonathan Corbet , pekka.paalanen@haloniitty.fi Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, jeremie.dautheribes@bootlin.com, miquel.raynal@bootlin.com, thomas.petazzoni@bootlin.com, seanpaul@google.com, marcheu@google.com, nicolejadeyee@google.com, Louis Chauvet X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=6429; i=louis.chauvet@bootlin.com; h=from:subject:message-id; bh=CsX4Bl/EEHcmw+Z+z88jdKEOU/WdC0wYmGUUTNJHiO0=; b=owEBbQKS/ZANAwAIASCtLsZbECziAcsmYgBl8eYzJmuhbk5UOvwem9mRZcBZgFRuaMALqEd0DVpz 5Z9d8nuJAjMEAAEIAB0WIQRPj7g/vng8MQxQWQQgrS7GWxAs4gUCZfHmMwAKCRAgrS7GWxAs4iUmEA CgpBgN8y/k8gzSXSZkY1+CFawep75UCzYQn52KNnsmIoh8Cxu0cvdis6uPF46OLUqtqZUlA4+DGVuw sA8KfaDlCW7ahC/ZhcpOlkegV3V4ou17c1ERlnfywGkO1mgULKuiwEnRxmBmmKsjS9iolckuKias1y fhE2kAVksA244hboNeeyAmB0EvEWNcJhLjL6f+98Rm7UdGws9jG/VsDHqjfp9GIgNUly33v5R59Cl2 steGyfvy1Wca8I7IgKhKO8GsAX6hbqmKEW7euYwi7GGK5Y3ej3LzK8FDCYwBna7pU7O/JK7IU//hmu 3Ufvcu56MYJ96Klk1HwJ8806V+G/QB+OFhKqQhYJtfpTqYZ+9f+CHB1XMB69Qh1f500AYh0/AUZycA 5v4lrJEVMQnnSUu4FtBLWsJlUwhkelqwN3i1163U3rgBG1z2d8sbfDTQKe/JipKILNIPKz1zPYXMXv 8msXGST8+O6FA3GXW6o+XH5+FNiTxronLuEzF9W8Xn1L7HGCUVbzNB6wNcPiRNbQuWy727JvhuybSH I74FWUOPpXlpDRBD0xT6VbFWwN136mpCQFW+/w3qNi9r0v0GjCWFSN2IYYrLbEamDcwn4v2GLNsdLs r41SWd+Ma8tX9hHBberB5lRWSbterkLFcl/ZPU/r5iaixtBfmUVbh7ZAp8uA== X-Developer-Key: i=louis.chauvet@bootlin.com; a=openpgp; fpr=8B7104AE9A272D6693F527F2EC1883F55E0B40A5 X-GND-Sasl: louis.chauvet@bootlin.com X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" As the pixel_read and pixel_write function should never modify the input buffer, mark those pointers const. Signed-off-by: Louis Chauvet Reviewed-by: Pekka Paalanen Reviewed-by: Maíra Canal --- drivers/gpu/drm/vkms/vkms_drv.h | 4 ++-- drivers/gpu/drm/vkms/vkms_formats.c | 24 ++++++++++++------------ 2 files changed, 14 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h index 4bfc62d26f08..3ead8b39af4a 100644 --- a/drivers/gpu/drm/vkms/vkms_drv.h +++ b/drivers/gpu/drm/vkms/vkms_drv.h @@ -61,7 +61,7 @@ struct line_buffer { * @out_pixel: destination address to write the pixel * @in_pixel: pixel to write */ -typedef void (*pixel_write_t)(u8 *out_pixel, struct pixel_argb_u16 *in_pixel); +typedef void (*pixel_write_t)(u8 *out_pixel, const struct pixel_argb_u16 *in_pixel); struct vkms_writeback_job { struct iosys_map data[DRM_FORMAT_MAX_PLANES]; @@ -76,7 +76,7 @@ struct vkms_writeback_job { * @in_pixel: Pointer to the pixel to read * @out_pixel: Pointer to write the converted pixel */ -typedef void (*pixel_read_t)(u8 *in_pixel, struct pixel_argb_u16 *out_pixel); +typedef void (*pixel_read_t)(const u8 *in_pixel, struct pixel_argb_u16 *out_pixel); /** * vkms_plane_state - Driver specific plane state diff --git a/drivers/gpu/drm/vkms/vkms_formats.c b/drivers/gpu/drm/vkms/vkms_formats.c index b57d85b8b935..b2f8dfc26c35 100644 --- a/drivers/gpu/drm/vkms/vkms_formats.c +++ b/drivers/gpu/drm/vkms/vkms_formats.c @@ -76,7 +76,7 @@ static int get_x_position(const struct vkms_frame_info *frame_info, int limit, i * They are used in the `vkms_compose_row` function to handle multiple formats. */ -static void ARGB8888_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel) +static void ARGB8888_to_argb_u16(const u8 *in_pixel, struct pixel_argb_u16 *out_pixel) { /* * The 257 is the "conversion ratio". This number is obtained by the @@ -90,7 +90,7 @@ static void ARGB8888_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel) out_pixel->b = (u16)in_pixel[0] * 257; } -static void XRGB8888_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel) +static void XRGB8888_to_argb_u16(const u8 *in_pixel, struct pixel_argb_u16 *out_pixel) { out_pixel->a = (u16)0xffff; out_pixel->r = (u16)in_pixel[2] * 257; @@ -98,7 +98,7 @@ static void XRGB8888_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel) out_pixel->b = (u16)in_pixel[0] * 257; } -static void ARGB16161616_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel) +static void ARGB16161616_to_argb_u16(const u8 *in_pixel, struct pixel_argb_u16 *out_pixel) { u16 *pixel = (u16 *)in_pixel; @@ -108,7 +108,7 @@ static void ARGB16161616_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pi out_pixel->b = le16_to_cpu(pixel[0]); } -static void XRGB16161616_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel) +static void XRGB16161616_to_argb_u16(const u8 *in_pixel, struct pixel_argb_u16 *out_pixel) { u16 *pixel = (u16 *)in_pixel; @@ -118,7 +118,7 @@ static void XRGB16161616_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pi out_pixel->b = le16_to_cpu(pixel[0]); } -static void RGB565_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel) +static void RGB565_to_argb_u16(const u8 *in_pixel, struct pixel_argb_u16 *out_pixel) { u16 *pixel = (u16 *)in_pixel; @@ -143,7 +143,7 @@ static void RGB565_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel) * It is used to avoid null pointer to be used as a function. In theory, this function should * never be called, except if you found a bug in the driver/DRM core. */ -static void black_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel) +static void black_to_argb_u16(const u8 *in_pixel, struct pixel_argb_u16 *out_pixel) { out_pixel->a = (u16)0xFFFF; out_pixel->r = 0; @@ -189,7 +189,7 @@ void vkms_compose_row(struct line_buffer *stage_buffer, struct vkms_plane_state * They are used in the `vkms_writeback_row` to convert and store a pixel from the src_buffer to * the writeback buffer. */ -static void argb_u16_to_ARGB8888(u8 *out_pixel, struct pixel_argb_u16 *in_pixel) +static void argb_u16_to_ARGB8888(u8 *out_pixel, const struct pixel_argb_u16 *in_pixel) { /* * This sequence below is important because the format's byte order is @@ -207,7 +207,7 @@ static void argb_u16_to_ARGB8888(u8 *out_pixel, struct pixel_argb_u16 *in_pixel) out_pixel[0] = DIV_ROUND_CLOSEST(in_pixel->b, 257); } -static void argb_u16_to_XRGB8888(u8 *out_pixel, struct pixel_argb_u16 *in_pixel) +static void argb_u16_to_XRGB8888(u8 *out_pixel, const struct pixel_argb_u16 *in_pixel) { out_pixel[3] = 0xff; out_pixel[2] = DIV_ROUND_CLOSEST(in_pixel->r, 257); @@ -215,7 +215,7 @@ static void argb_u16_to_XRGB8888(u8 *out_pixel, struct pixel_argb_u16 *in_pixel) out_pixel[0] = DIV_ROUND_CLOSEST(in_pixel->b, 257); } -static void argb_u16_to_ARGB16161616(u8 *out_pixel, struct pixel_argb_u16 *in_pixel) +static void argb_u16_to_ARGB16161616(u8 *out_pixel, const struct pixel_argb_u16 *in_pixel) { u16 *pixel = (u16 *)out_pixel; @@ -225,7 +225,7 @@ static void argb_u16_to_ARGB16161616(u8 *out_pixel, struct pixel_argb_u16 *in_pi pixel[0] = cpu_to_le16(in_pixel->b); } -static void argb_u16_to_XRGB16161616(u8 *out_pixel, struct pixel_argb_u16 *in_pixel) +static void argb_u16_to_XRGB16161616(u8 *out_pixel, const struct pixel_argb_u16 *in_pixel) { u16 *pixel = (u16 *)out_pixel; @@ -235,7 +235,7 @@ static void argb_u16_to_XRGB16161616(u8 *out_pixel, struct pixel_argb_u16 *in_pi pixel[0] = cpu_to_le16(in_pixel->b); } -static void argb_u16_to_RGB565(u8 *out_pixel, struct pixel_argb_u16 *in_pixel) +static void argb_u16_to_RGB565(u8 *out_pixel, const struct pixel_argb_u16 *in_pixel) { u16 *pixel = (u16 *)out_pixel; @@ -260,7 +260,7 @@ static void argb_u16_to_RGB565(u8 *out_pixel, struct pixel_argb_u16 *in_pixel) * It is used to avoid null pointer to be used as a function. In theory, this should never * happen, except if there is a bug in the driver */ -static void argb_u16_to_nothing(u8 *out_pixel, struct pixel_argb_u16 *in_pixel) +static void argb_u16_to_nothing(u8 *out_pixel, const struct pixel_argb_u16 *in_pixel) {} /**