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Fri, 1 May 2026 00:20:37 +0200 (CEST) Received: by jupiter.universe (Postfix, from userid 1000) id 13F5C480035; Fri, 01 May 2026 00:20:37 +0200 (CEST) From: Sebastian Reichel Date: Fri, 01 May 2026 00:20:31 +0200 Subject: [PATCH v2 04/12] drm/bridge: synopsys: dw-dp: Support MEDIA_BUS_FMT_FIXED MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260501-synopsys-dw-dp-improvements-v2-4-d7e7f6bac77f@collabora.com> References: <20260501-synopsys-dw-dp-improvements-v2-0-d7e7f6bac77f@collabora.com> In-Reply-To: <20260501-synopsys-dw-dp-improvements-v2-0-d7e7f6bac77f@collabora.com> To: Sandy Huang , =?utf-8?q?Heiko_St=C3=BCbner?= , Andy Yan , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Rob Herring , Krzysztof Kozlowski , Conor Dooley , David Airlie , Simona Vetter , Dmitry Baryshkov , Luca Ceresoli Cc: Cristian Ciocaltea , Damon Ding , Dmitry Baryshkov , Alexey Charkov , dri-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, kernel@collabora.com, linux-arm-kernel@lists.infradead.org, Sebastian Reichel X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; 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a=openpgp; fpr=EF660D07463F8B726A795413D8EED7F3C83BFA9A X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260430_152041_330473_8FE49699 X-CRM114-Status: GOOD ( 13.07 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add support for MEDIA_BUS_FMT_FIXED, which is e.g. requested for USB-C DP chains as the last bridge in the chain (aux-hpd-bridge) does not implement atomic_get_output_bus_fmts(), which results in the generic drm_atomic_bridge_chain_select_bus_fmts() code using MEDIA_BUS_FMT_FIXED instead. Signed-off-by: Sebastian Reichel --- drivers/gpu/drm/bridge/synopsys/dw-dp.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/synopsys/dw-dp.c b/drivers/gpu/drm/bridge/synopsys/dw-dp.c index 6211ba6ba7bd..fc4ddb7792d7 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-dp.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-dp.c @@ -1528,6 +1528,7 @@ static int dw_dp_bridge_atomic_check(struct drm_bridge *bridge, struct drm_connector_state *conn_state) { struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode; + unsigned int out_bus_format = bridge_state->output_bus_cfg.format; struct dw_dp *dp = bridge_to_dp(bridge); struct dw_dp_bridge_state *state; const struct dw_dp_output_format *fmt; @@ -1538,7 +1539,10 @@ static int dw_dp_bridge_atomic_check(struct drm_bridge *bridge, state = to_dw_dp_bridge_state(bridge_state); mode = &state->mode; - fmt = dw_dp_get_output_format(bridge_state->output_bus_cfg.format); + if (out_bus_format == MEDIA_BUS_FMT_FIXED) + out_bus_format = MEDIA_BUS_FMT_RGB888_1X24; + + fmt = dw_dp_get_output_format(out_bus_format); if (!fmt) return -EINVAL; -- 2.53.0