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bf94ec093d
The DSI host might be left in some state by the bootloader. If this
state generates an IRQ, it might hang the system by holding the
interrupt line before the driver sets up the DSI host to the known
state.
Move the request_irq into msm_dsi_host_init and pass IRQF_NO_AUTOEN to
it. Call enable/disable_irq after msm_dsi_host_power_on/_off()
functions, so that we can be sure that the interrupt is delivered when
the host is in the known state.
It is not possible to defer the interrupt enablement to a later point,
because drm_panel_prepare might need to communicate with the panel over
the DSI link and that requires working interrupt.
Fixes: a689554ba6 ("drm/msm: Initial add DSI connector support")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
Link: https://lore.kernel.org/r/20211002010830.647416-1-dmitry.baryshkov@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
184 lines
6.4 KiB
C
184 lines
6.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2015, The Linux Foundation. All rights reserved.
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*/
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#ifndef __DSI_CONNECTOR_H__
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#define __DSI_CONNECTOR_H__
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <drm/drm_bridge.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_mipi_dsi.h>
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#include <drm/drm_panel.h>
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#include "msm_drv.h"
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#include "disp/msm_disp_snapshot.h"
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#define DSI_0 0
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#define DSI_1 1
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#define DSI_MAX 2
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struct msm_dsi_phy_shared_timings;
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struct msm_dsi_phy_clk_request;
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enum msm_dsi_phy_usecase {
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MSM_DSI_PHY_STANDALONE,
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MSM_DSI_PHY_MASTER,
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MSM_DSI_PHY_SLAVE,
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};
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#define DSI_DEV_REGULATOR_MAX 8
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#define DSI_BUS_CLK_MAX 4
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/* Regulators for DSI devices */
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struct dsi_reg_entry {
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char name[32];
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int enable_load;
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int disable_load;
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};
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struct dsi_reg_config {
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int num;
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struct dsi_reg_entry regs[DSI_DEV_REGULATOR_MAX];
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};
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struct msm_dsi {
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struct drm_device *dev;
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struct platform_device *pdev;
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/* connector managed by us when we're connected to a drm_panel */
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struct drm_connector *connector;
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/* internal dsi bridge attached to MDP interface */
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struct drm_bridge *bridge;
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struct mipi_dsi_host *host;
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struct msm_dsi_phy *phy;
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/*
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* panel/external_bridge connected to dsi bridge output, only one of the
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* two can be valid at a time
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*/
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struct drm_panel *panel;
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struct drm_bridge *external_bridge;
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struct device *phy_dev;
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bool phy_enabled;
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/* the encoder we are hooked to (outside of dsi block) */
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struct drm_encoder *encoder;
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int id;
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};
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/* dsi manager */
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struct drm_bridge *msm_dsi_manager_bridge_init(u8 id);
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void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge);
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struct drm_connector *msm_dsi_manager_connector_init(u8 id);
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struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id);
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int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg);
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bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len);
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int msm_dsi_manager_register(struct msm_dsi *msm_dsi);
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void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi);
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bool msm_dsi_manager_validate_current_config(u8 id);
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void msm_dsi_manager_tpg_enable(void);
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/* msm dsi */
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static inline bool msm_dsi_device_connected(struct msm_dsi *msm_dsi)
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{
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return msm_dsi->panel || msm_dsi->external_bridge;
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}
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struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi);
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/* dsi host */
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struct msm_dsi_host;
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int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
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const struct mipi_dsi_msg *msg);
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void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,
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const struct mipi_dsi_msg *msg);
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int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host,
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const struct mipi_dsi_msg *msg);
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int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
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const struct mipi_dsi_msg *msg);
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void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host,
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u32 dma_base, u32 len);
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int msm_dsi_host_enable(struct mipi_dsi_host *host);
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int msm_dsi_host_disable(struct mipi_dsi_host *host);
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void msm_dsi_host_enable_irq(struct mipi_dsi_host *host);
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void msm_dsi_host_disable_irq(struct mipi_dsi_host *host);
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int msm_dsi_host_power_on(struct mipi_dsi_host *host,
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struct msm_dsi_phy_shared_timings *phy_shared_timings,
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bool is_bonded_dsi, struct msm_dsi_phy *phy);
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int msm_dsi_host_power_off(struct mipi_dsi_host *host);
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int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
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const struct drm_display_mode *mode);
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struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host);
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unsigned long msm_dsi_host_get_mode_flags(struct mipi_dsi_host *host);
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struct drm_bridge *msm_dsi_host_get_bridge(struct mipi_dsi_host *host);
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int msm_dsi_host_register(struct mipi_dsi_host *host, bool check_defer);
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void msm_dsi_host_unregister(struct mipi_dsi_host *host);
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int msm_dsi_host_set_src_pll(struct mipi_dsi_host *host,
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struct msm_dsi_phy *src_phy);
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void msm_dsi_host_reset_phy(struct mipi_dsi_host *host);
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void msm_dsi_host_get_phy_clk_req(struct mipi_dsi_host *host,
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struct msm_dsi_phy_clk_request *clk_req,
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bool is_bonded_dsi);
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void msm_dsi_host_destroy(struct mipi_dsi_host *host);
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int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
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struct drm_device *dev);
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int msm_dsi_host_init(struct msm_dsi *msm_dsi);
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int msm_dsi_runtime_suspend(struct device *dev);
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int msm_dsi_runtime_resume(struct device *dev);
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int dsi_link_clk_set_rate_6g(struct msm_dsi_host *msm_host);
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int dsi_link_clk_set_rate_v2(struct msm_dsi_host *msm_host);
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int dsi_link_clk_enable_6g(struct msm_dsi_host *msm_host);
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int dsi_link_clk_enable_v2(struct msm_dsi_host *msm_host);
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void dsi_link_clk_disable_6g(struct msm_dsi_host *msm_host);
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void dsi_link_clk_disable_v2(struct msm_dsi_host *msm_host);
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int dsi_tx_buf_alloc_6g(struct msm_dsi_host *msm_host, int size);
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int dsi_tx_buf_alloc_v2(struct msm_dsi_host *msm_host, int size);
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void *dsi_tx_buf_get_6g(struct msm_dsi_host *msm_host);
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void *dsi_tx_buf_get_v2(struct msm_dsi_host *msm_host);
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void dsi_tx_buf_put_6g(struct msm_dsi_host *msm_host);
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int dsi_dma_base_get_6g(struct msm_dsi_host *msm_host, uint64_t *iova);
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int dsi_dma_base_get_v2(struct msm_dsi_host *msm_host, uint64_t *iova);
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int dsi_clk_init_v2(struct msm_dsi_host *msm_host);
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int dsi_clk_init_6g_v2(struct msm_dsi_host *msm_host);
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int dsi_calc_clk_rate_v2(struct msm_dsi_host *msm_host, bool is_bonded_dsi);
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int dsi_calc_clk_rate_6g(struct msm_dsi_host *msm_host, bool is_bonded_dsi);
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void msm_dsi_host_snapshot(struct msm_disp_state *disp_state, struct mipi_dsi_host *host);
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void msm_dsi_host_test_pattern_en(struct mipi_dsi_host *host);
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/* dsi phy */
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struct msm_dsi_phy;
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struct msm_dsi_phy_shared_timings {
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u32 clk_post;
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u32 clk_pre;
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bool clk_pre_inc_by_2;
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};
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struct msm_dsi_phy_clk_request {
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unsigned long bitclk_rate;
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unsigned long escclk_rate;
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};
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void msm_dsi_phy_driver_register(void);
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void msm_dsi_phy_driver_unregister(void);
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int msm_dsi_phy_enable(struct msm_dsi_phy *phy,
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struct msm_dsi_phy_clk_request *clk_req,
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struct msm_dsi_phy_shared_timings *shared_timings);
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void msm_dsi_phy_disable(struct msm_dsi_phy *phy);
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void msm_dsi_phy_set_usecase(struct msm_dsi_phy *phy,
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enum msm_dsi_phy_usecase uc);
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int msm_dsi_phy_get_clk_provider(struct msm_dsi_phy *phy,
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struct clk **byte_clk_provider, struct clk **pixel_clk_provider);
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void msm_dsi_phy_pll_save_state(struct msm_dsi_phy *phy);
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int msm_dsi_phy_pll_restore_state(struct msm_dsi_phy *phy);
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void msm_dsi_phy_snapshot(struct msm_disp_state *disp_state, struct msm_dsi_phy *phy);
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bool msm_dsi_phy_set_continuous_clock(struct msm_dsi_phy *phy, bool enable);
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#endif /* __DSI_CONNECTOR_H__ */
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