linux-kernel - [PATCH 5/6] drm: vkms: Prepare `vkms_wb_encoder_atomic

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Message-Id: <20211005201637.58563-6-igormtorrente@gmail.com>
Date:   Tue,  5 Oct 2021 17:16:36 -0300
From:   Igor Matheus Andrade Torrente <igormtorrente@...il.com>
To:     rodrigosiqueiramelo@...il.com, melissa.srw@...il.com
Cc:     Igor Matheus Andrade Torrente <igormtorrente@...il.com>,
        hamohammed.sa@...il.com, daniel@...ll.ch, airlied@...ux.ie,
        contact@...rsion.fr, leandro.ribeiro@...labora.com,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        lkcamp@...ts.libreplanetbr.org
Subject: [PATCH 5/6] drm: vkms: Prepare `vkms_wb_encoder_atomic_check` to accept multiple formats

Currently, the vkms atomic check only goes through the first position of
the `vkms_wb_formats` vector.

This change prepares the atomic_check to check the entire vector.

Signed-off-by: Igor Matheus Andrade Torrente <igormtorrente@...il.com>
---
 drivers/gpu/drm/vkms/vkms_writeback.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vkms/vkms_writeback.c b/drivers/gpu/drm/vkms/vkms_writeback.c
index 5a3e12f105dc..56978f499203 100644
--- a/drivers/gpu/drm/vkms/vkms_writeback.c
+++ b/drivers/gpu/drm/vkms/vkms_writeback.c
@@ -30,6 +30,8 @@ static int vkms_wb_encoder_atomic_check(struct drm_encoder *encoder,
 {
 	struct drm_framebuffer *fb;
 	const struct drm_display_mode *mode = &crtc_state->mode;
+	bool format_supported = false;
+	int i;
 
 	if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
 		return 0;
@@ -41,7 +43,14 @@ static int vkms_wb_encoder_atomic_check(struct drm_encoder *encoder,
 		return -EINVAL;
 	}
 
-	if (fb->format->format != vkms_wb_formats[0]) {
+	for (i = 0; i < ARRAY_SIZE(vkms_wb_formats); i++) {
+		if (fb->format->format == vkms_wb_formats[i]) {
+			format_supported = true;
+			break;
+		}
+	}
+
+	if (!format_supported) {
 		DRM_DEBUG_KMS("Invalid pixel format %p4cc\n",
 			      &fb->format->format);
 		return -EINVAL;
-- 
2.30.2