Neil Armstrong 93c97bc8d8 drm/msm: dsi: fix PLL init in bonded mode ... When in bonded DSI mode, only one PLL in one DSI PHY is used for both DSI PHYs, meaning that parents of the secondary DSI PHY will use the primary DSI PHY PLL as parent. In this case the primary DSI PHY PLL will be set even if the primary DSI PHY is not yet enabled. The DSI PHY code has support for this particular use-case and will handle the fact the PLL was already set when initializing the primary DSI PHY. By introducing a protected variable pll_enable_cnt in the commit cb55f39bf7 ("drm/msm/dsi/phy: Fix reading zero as PLL rates when unprepared"), this variable is only initially set to 1 when the DSI PHY is initialized making it impossible to set the PLL before, breaking the bonded DSI use case by returning 0 when setting the PLL from the secondary DSI PHY driver and skipping the correct clocks initialization. But since it was already possible to set the PLL without enabling the DSI PHY, just drop the pll_enable_cnt setting from the PHY enable/disable and simply increment/decrement the pll_enable_cnt variable from the dsi_pll_enable/disable_pll_bias to make sure any PLL operation is done with the PLL BIAS enabled. Fixes: cb55f39bf7 ("drm/msm/dsi/phy: Fix reading zero as PLL rates when unprepared") Closes: https://lore.kernel.org/all/50a49d72-2b1e-471d-b0c4-d5a0b38b2a21@linaro.org/ Tested-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> Patchwork: https://patchwork.freedesktop.org/patch/683688/ Link: https://lore.kernel.org/r/20251027-topic-sm8x50-fix-dsi-bonded-v1-1-a477cd3f907d@linaro.org Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>		2025-10-29 00:10:06 +02:00
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phy	drm/msm: dsi: fix PLL init in bonded mode	2025-10-29 00:10:06 +02:00
dsi.c	drm/msm: move KMS driver data to msm_kms	2025-07-05 07:13:35 -07:00
dsi.h	drm/msm/dsi: Add support for SM8750	2025-07-04 16:35:19 +03:00
dsi_cfg.c	drm/msm/dsi: Add support for SM8750	2025-07-04 16:35:19 +03:00
dsi_cfg.h	drm/msm/dsi: Add support for SM8750	2025-07-04 16:35:19 +03:00
dsi_host.c	drm/msm: Use drm_gpuvm types more	2025-07-04 17:48:35 -07:00
dsi_manager.c	drm/msm/dsi: convert to devm_drm_bridge_alloc() API	2025-04-29 11:21:24 +02:00