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drm/vc4: dsi: Don't reset the host until post_disable

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Some DSI peripheral drivers wish to send commands in the
post_disable or panel unprepare callback. These are called
after the DSI host's disable call, but before the host's
post_disable if pre_enable_prev_first is set.

Don't reset the block until post_disable to allow these
commands to be sent.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
This commit is contained in:
Dave Stevenson
2024-05-02 12:03:58 +01:00
committed by Dom Cobley
parent 61289a0e69
commit 5dbbda8db8
1 changed files with 7 additions and 8 deletions
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15
drivers/gpu/drm/vc4/vc4_dsi.c
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@@ -821,6 +821,13 @@ static void vc4_dsi_bridge_disable(struct drm_bridge *bridge,
disp0_ctrl = DSI_PORT_READ(DISP0_CTRL);
disp0_ctrl &= ~DSI_DISP0_ENABLE;
DSI_PORT_WRITE(DISP0_CTRL, disp0_ctrl);
}
static void vc4_dsi_bridge_post_disable(struct drm_bridge *bridge,
struct drm_atomic_state *state)
{
struct vc4_dsi *dsi = bridge_to_vc4_dsi(bridge);
struct device *dev = &dsi->pdev->dev;
/* Reset the DSI and all its fifos. */
DSI_PORT_WRITE(CTRL, DSI_CTRL_SOFT_RESET_CFG |
@@ -831,14 +838,6 @@ static void vc4_dsi_bridge_disable(struct drm_bridge *bridge,
DSI_PORT_BIT(PHY_AFEC0_PD) |
DSI_PORT_BIT(AFEC0_PD_ALL_LANES));
}
static void vc4_dsi_bridge_post_disable(struct drm_bridge *bridge,
struct drm_atomic_state *state)
{
struct vc4_dsi *dsi = bridge_to_vc4_dsi(bridge);
struct device *dev = &dsi->pdev->dev;
clk_disable_unprepare(dsi->pll_phy_clock);
clk_disable_unprepare(dsi->escape_clock);
clk_disable_unprepare(dsi->pixel_clock);