kernel/linux.git/drivers/gpu/drm/bridge, branch v6.19.11

drm/bridge: dw-hdmi-qp: fix multi-channel audio output

2026-03-25T10:13:31+00:00

[ Upstream commit cffcb42c57686e9a801dfcf37a3d0c62e51c1c3e ] Channel Allocation (PB4) and Level Shift Information (PB5) are configured with values from PB1 and PB2 due to the wrong offset being used. This results in missing audio channels or incorrect speaker placement when playing multi-channel audio. Use the correct offset to fix multi-channel audio output. Fixes: fd0141d1a8a2 ("drm/bridge: synopsys: Add audio support for dw-hdmi-qp") Reported-by: Christian Hewitt Signed-off-by: Jonas Karlman Signed-off-by: Christian Hewitt Reviewed-by: Cristian Ciocaltea Link: https://patch.msgid.link/20260228112822.4056354-1-christianshewitt@gmail.com Signed-off-by: Luca Ceresoli Signed-off-by: Sasha Levin

drm/bridge: ti-sn65dsi83: halve horizontal syncs for dual LVDS output

2026-03-19T15:15:23+00:00

commit d0d727746944096a6681dc6adb5f123fc5aa018d upstream. Dual LVDS output (available on the SN65DSI84) requires HSYNC_PULSE_WIDTH and HORIZONTAL_BACK_PORCH to be divided by two with respect to the values used for single LVDS output. While not clearly stated in the datasheet, this is needed according to the DSI Tuner [0] output. It also makes sense intuitively because in dual LVDS output two pixels at a time are output and so the output clock is half of the pixel clock. Some dual-LVDS panels refuse to show any picture without this fix. Divide by two HORIZONTAL_FRONT_PORCH too, even though this register is used only for test pattern generation which is not currently implemented by this driver. [0] https://www.ti.com/tool/DSI-TUNER Fixes: ceb515ba29ba ("drm/bridge: ti-sn65dsi83: Add TI SN65DSI83 and SN65DSI84 driver") Cc: stable@vger.kernel.org Reviewed-by: Marek Vasut Link: https://patch.msgid.link/20260226-ti-sn65dsi83-dual-lvds-fixes-and-test-pattern-v1-2-2e15f5a9a6a0@bootlin.com Signed-off-by: Luca Ceresoli Signed-off-by: Greg Kroah-Hartman

drm/bridge: ti-sn65dsi83: fix CHA_DSI_CLK_RANGE rounding

2026-03-19T15:15:23+00:00

commit 2f22702dc0fee06a240404e0f7ead5b789b253d8 upstream. The DSI frequency must be in the range: (CHA_DSI_CLK_RANGE * 5 MHz) <= DSI freq < ((CHA_DSI_CLK_RANGE + 1) * 5 MHz) So the register value should point to the lower range value, but DIV_ROUND_UP() rounds the division to the higher range value, resulting in an excess of 1 (unless the frequency is an exact multiple of 5 MHz). For example for a 437100000 MHz clock CHA_DSI_CLK_RANGE should be 87 (0x57): (87 * 5 = 435) <= 437.1 < (88 * 5 = 440) but current code returns 88 (0x58). Fix the computation by removing the DIV_ROUND_UP(). Fixes: ceb515ba29ba ("drm/bridge: ti-sn65dsi83: Add TI SN65DSI83 and SN65DSI84 driver") Cc: stable@vger.kernel.org Reviewed-by: Marek Vasut Link: https://patch.msgid.link/20260226-ti-sn65dsi83-dual-lvds-fixes-and-test-pattern-v1-1-2e15f5a9a6a0@bootlin.com Signed-off-by: Luca Ceresoli Signed-off-by: Greg Kroah-Hartman

drm/bridge: ti-sn65dsi86: Enable HPD polling if IRQ is not used

2026-03-19T15:15:13+00:00

commit 0b87d51690dd5131cbe9fbd23746b037aab89815 upstream. Fallback to polling to detect hotplug events on systems without interrupts. On systems where the interrupt line of the bridge is not connected, the bridge cannot notify hotplug events. Only add the DRM_BRIDGE_OP_HPD flag if an interrupt has been registered otherwise remain in polling mode. Fixes: 55e8ff842051 ("drm/bridge: ti-sn65dsi86: Add HPD for DisplayPort connector type") Cc: stable@vger.kernel.org # 6.16: 9133bc3f0564: drm/bridge: ti-sn65dsi86: Add Signed-off-by: Franz Schnyder Reviewed-by: Douglas Anderson [dianders: Adjusted Fixes/stable line based on discussion] Signed-off-by: Douglas Anderson Link: https://patch.msgid.link/20260206123758.374555-1-fra.schnyder@gmail.com Signed-off-by: Greg Kroah-Hartman

drm/bridge: samsung-dsim: Fix memory leak in error path

2026-03-19T15:15:13+00:00

commit 803ec1faf7c1823e6e3b1f2aaa81be18528c9436 upstream. In samsung_dsim_host_attach(), drm_bridge_add() is called to add the bridge. However, if samsung_dsim_register_te_irq() or pdata->host_ops->attach() fails afterwards, the function returns without removing the bridge, causing a memory leak. Fix this by adding proper error handling with goto labels to ensure drm_bridge_remove() is called in all error paths. Also ensure that samsung_dsim_unregister_te_irq() is called if the attach operation fails after the TE IRQ has been registered. samsung_dsim_unregister_te_irq() function is moved without changes to be before samsung_dsim_host_attach() to avoid forward declaration. Fixes: e7447128ca4a ("drm: bridge: Generalize Exynos-DSI driver into a Samsung DSIM bridge") Cc: stable@vger.kernel.org Signed-off-by: Osama Abdelkader Reviewed-by: Luca Ceresoli Link: https://patch.msgid.link/20260209184115.10937-1-osama.abdelkader@gmail.com Signed-off-by: Luca Ceresoli Signed-off-by: Greg Kroah-Hartman

drm/bridge: synopsys: dw-dp: Check return value of devm_drm_bridge_add() in dw_dp_bind()

2026-03-12T11:09:09+00:00

[ Upstream commit 496daa2759260374bb9c9b2196a849aa3bc513a8 ] Return the value of devm_drm_bridge_add() in order to propagate the error properly, if it fails due to resource allocation failure or bridge registration failure. This ensures that the bind function fails safely rather than proceeding with a potentially incomplete bridge setup. Fixes: b726970486d8 ("drm/bridge: synopsys: dw-dp: add bridge before attaching") Signed-off-by: Chen Ni Reviewed-by: Andy Yan Reviewed-by: Luca Ceresoli Link: https://patch.msgid.link/20260206040621.4095517-1-nichen@iscas.ac.cn Signed-off-by: Luca Ceresoli Signed-off-by: Sasha Levin

drm/bridge: anx7625: Fix invalid EDID size

2026-03-04T12:21:20+00:00

[ Upstream commit 1d5362145de96b5d00d590605cc94cdfa572b405 ] DRM checks EDID block count against allocated size in drm_edid_valid function. We have to allocate the right EDID size instead of the max size to prevent the EDID to be reported as invalid. Cc: stable@kernel.org Fixes: 7c585f9a71aa ("drm/bridge: anx7625: use struct drm_edid more") Reviewed-by: Dmitry Baryshkov Signed-off-by: Loic Poulain Link: https://patch.msgid.link/20251218151307.95491-1-loic.poulain@oss.qualcomm.com Signed-off-by: Dmitry Baryshkov Signed-off-by: Sasha Levin

drm/bridge: imx8mp-hdmi-pai: enable PM runtime

2026-02-05T08:16:45+00:00

There is an audio channel shift issue with multi channel case - the channel order is correct for the first run, but the channel order is shifted for the second run. The fix method is to reset the PAI interface at the end of playback. The reset can be handled by PM runtime, so enable PM runtime. Fixes: 0205fae6327a ("drm/bridge: imx: add driver for HDMI TX Parallel Audio Interface") Signed-off-by: Shengjiu Wang Reviewed-by: Liu Ying Signed-off-by: Liu Ying Link: https://lore.kernel.org/r/20260130080910.3532724-1-shengjiu.wang@nxp.com

drm/bridge: synopsys: dw-dp: fix error paths of dw_dp_bind

2026-01-20T14:19:50+00:00

Fix several issues in dw_dp_bind() error handling: 1. Missing return after drm_bridge_attach() failure - the function continued execution instead of returning an error. 2. Resource leak: drm_dp_aux_register() is not a devm function, so drm_dp_aux_unregister() must be called on all error paths after aux registration succeeds. This affects errors from: - drm_bridge_attach() - phy_init() - devm_add_action_or_reset() - platform_get_irq() - devm_request_threaded_irq() 3. Bug fix: platform_get_irq() returns the IRQ number or a negative error code, but the error path was returning ERR_PTR(ret) instead of ERR_PTR(dp->irq). Use a goto label for cleanup to ensure consistent error handling. Fixes: 86eecc3a9c2e ("drm/bridge: synopsys: Add DW DPTX Controller support library") Cc: stable@vger.kernel.org Signed-off-by: Osama Abdelkader Reviewed-by: Louis Chauvet Reviewed-by: Luca Ceresoli Link: https://patch.msgid.link/20260102155553.13243-1-osama.abdelkader@gmail.com Signed-off-by: Luca Ceresoli

drm/bridge: dw-hdmi-qp: Fix spurious IRQ on resume

2026-01-07T12:20:13+00:00

After resume from suspend to RAM, the following splash is generated if the HDMI driver is probed (independent of a connected cable): [ 1194.484052] irq 80: nobody cared (try booting with the "irqpoll" option) [ 1194.484074] CPU: 0 UID: 0 PID: 627 Comm: rtcwake Not tainted 6.17.0-rc7-g96f1a11414b3 #1 PREEMPT [ 1194.484082] Hardware name: Rockchip RK3576 EVB V10 Board (DT) [ 1194.484085] Call trace: [ 1194.484087] ... (stripped) [ 1194.484283] handlers: [ 1194.484285] [<00000000bc363dcb>] dw_hdmi_qp_main_hardirq [dw_hdmi_qp] [ 1194.484302] Disabling IRQ #80 Apparently the HDMI IP is losing part of its state while the system is suspended and generates spurious interrupts during resume. The bug has not yet been noticed, as system suspend does not yet work properly on upstream kernel with either the Rockchip RK3588 or RK3576 platform. Fixes: 128a9bf8ace2 ("drm/rockchip: Add basic RK3588 HDMI output support") Signed-off-by: Sebastian Reichel Reviewed-by: Cristian Ciocaltea Signed-off-by: Heiko Stuebner Link: https://patch.msgid.link/20251014-rockchip-hdmi-suspend-fix-v1-1-983fcbf44839@collabora.com