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{
    "id": 2218386,
    "url": "http://patchwork.ozlabs.org/api/patches/2218386/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/linux-gpio/patch/20260401-waveshare-dsi-touch-v1-8-5e9119b5a014@oss.qualcomm.com/",
    "project": {
        "id": 42,
        "url": "http://patchwork.ozlabs.org/api/projects/42/?format=api",
        "name": "Linux GPIO development",
        "link_name": "linux-gpio",
        "list_id": "linux-gpio.vger.kernel.org",
        "list_email": "linux-gpio@vger.kernel.org",
        "web_url": "",
        "scm_url": "",
        "webscm_url": "",
        "list_archive_url": "",
        "list_archive_url_format": "",
        "commit_url_format": ""
    },
    "msgid": "<20260401-waveshare-dsi-touch-v1-8-5e9119b5a014@oss.qualcomm.com>",
    "list_archive_url": null,
    "date": "2026-04-01T07:26:27",
    "name": "[08/19] drm/panel: himax-hx8394: set prepare_prev_first",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
    "archived": false,
    "hash": "1da4c771501dad61ad75279df1cf454e4badfbb6",
    "submitter": {
        "id": 90483,
        "url": "http://patchwork.ozlabs.org/api/people/90483/?format=api",
        "name": "Dmitry Baryshkov",
        "email": "dmitry.baryshkov@oss.qualcomm.com"
    },
    "delegate": null,
    "mbox": "http://patchwork.ozlabs.org/project/linux-gpio/patch/20260401-waveshare-dsi-touch-v1-8-5e9119b5a014@oss.qualcomm.com/mbox/",
    "series": [
        {
            "id": 498284,
            "url": "http://patchwork.ozlabs.org/api/series/498284/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/linux-gpio/list/?series=498284",
            "date": "2026-04-01T07:26:23",
            "name": "drm/panel: support Waveshare DSI TOUCH kits",
            "version": 1,
            "mbox": "http://patchwork.ozlabs.org/series/498284/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/2218386/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/2218386/checks/",
    "tags": {},
    "related": [],
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        ],
        "From": "Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>",
        "Date": "Wed, 01 Apr 2026 10:26:27 +0300",
        "Subject": "[PATCH 08/19] drm/panel: himax-hx8394: set prepare_prev_first",
        "Precedence": "bulk",
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        "Message-Id": "<20260401-waveshare-dsi-touch-v1-8-5e9119b5a014@oss.qualcomm.com>",
        "References": "<20260401-waveshare-dsi-touch-v1-0-5e9119b5a014@oss.qualcomm.com>",
        "In-Reply-To": "<20260401-waveshare-dsi-touch-v1-0-5e9119b5a014@oss.qualcomm.com>",
        "To": "Neil Armstrong <neil.armstrong@linaro.org>,\n        Jessica Zhang <jesszhan0024@gmail.com>,\n        David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,\n        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,\n        Maxime Ripard <mripard@kernel.org>,\n        Thomas Zimmermann <tzimmermann@suse.de>,\n Rob Herring <robh@kernel.org>,\n        Krzysztof Kozlowski <krzk+dt@kernel.org>,\n        Conor Dooley <conor+dt@kernel.org>,\n        Cong Yang <yangcong5@huaqin.corp-partner.google.com>,\n        Ondrej Jirman <megi@xff.cz>,\n        Javier Martinez Canillas <javierm@redhat.com>,\n        Jagan Teki <jagan@edgeble.ai>, Liam Girdwood <lgirdwood@gmail.com>,\n        Mark Brown <broonie@kernel.org>, Linus Walleij <linusw@kernel.org>,\n        Bartosz Golaszewski <brgl@kernel.org>",
        "Cc": "dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org,\n        linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org",
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    },
    "content": "Sending DSI commands from the prepare() callback requires DSI link to be\nup at that point. For DSI hosts is guaranteed only if the panel driver\nsets the .prepare_prev_first flag. Set it to let these panels work with\nthe DSI hosts which don't power on the link in their .mode_set callback.\n\nSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>\n---\n drivers/gpu/drm/panel/panel-himax-hx8394.c | 2 ++\n 1 file changed, 2 insertions(+)",
    "diff": "diff --git a/drivers/gpu/drm/panel/panel-himax-hx8394.c b/drivers/gpu/drm/panel/panel-himax-hx8394.c\nindex c4d3e09a228d..d64f3521eb15 100644\n--- a/drivers/gpu/drm/panel/panel-himax-hx8394.c\n+++ b/drivers/gpu/drm/panel/panel-himax-hx8394.c\n@@ -792,6 +792,8 @@ static int hx8394_probe(struct mipi_dsi_device *dsi)\n \tif (ret)\n \t\treturn ret;\n \n+\tctx->panel.prepare_prev_first = true;\n+\n \tdrm_panel_add(&ctx->panel);\n \n \tret = mipi_dsi_attach(dsi);\n",
    "prefixes": [
        "08/19"
    ]
}