From 92aed3a8da88d868ecdca0ca406f8e632f48bad4 Mon Sep 17 00:00:00 2001 From: Cristian Ciocaltea Date: Sat, 16 Nov 2024 20:22:34 +0200 Subject: [PATCH 453/480] drm/rockchip: vop2: Improve display modes handling on RK3588 HDMI0 The RK3588 specific implementation is currently quite limited in terms of handling the full range of display modes supported by the connected screens, e.g. 2560x1440@75Hz, 2048x1152@60Hz, 1024x768@60Hz are just a few of them. Additionally, it doesn't cope well with non-integer refresh rates like 59.94, 29.97, 23.98, etc. Make use of HDMI0 PHY PLL as a more accurate DCLK source to handle all display modes up to 4K@60Hz. Signed-off-by: Cristian Ciocaltea Tested-by: FUKAUMI Naoki --- drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 34 ++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c index 17a98845fd31..62aee42ccf03 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c @@ -159,6 +159,7 @@ struct vop2_video_port { struct drm_crtc crtc; struct vop2 *vop2; struct clk *dclk; + struct clk *dclk_src; unsigned int id; const struct vop2_video_port_data *data; @@ -214,6 +215,7 @@ struct vop2 { struct clk *hclk; struct clk *aclk; struct clk *pclk; + struct clk *pll_hdmiphy0; /* optional internal rgb encoder */ struct rockchip_rgb *rgb; @@ -222,6 +224,8 @@ struct vop2 { struct vop2_win win[]; }; +#define VOP2_MAX_DCLK_RATE 600000 /* kHz */ + #define vop2_output_if_is_hdmi(x) ((x) == ROCKCHIP_VOP2_EP_HDMI0 || \ (x) == ROCKCHIP_VOP2_EP_HDMI1) @@ -1155,6 +1159,9 @@ static void vop2_crtc_atomic_disable(struct drm_crtc *crtc, vop2_crtc_disable_irq(vp, VP_INT_DSP_HOLD_VALID); + if (vp->dclk_src) + clk_set_parent(vp->dclk, vp->dclk_src); + clk_disable_unprepare(vp->dclk); vop2->enable_count--; @@ -2259,6 +2266,27 @@ static void vop2_crtc_atomic_enable(struct drm_crtc *crtc, vop2_vp_write(vp, RK3568_VP_MIPI_CTRL, 0); + /* + * Switch to HDMI PHY PLL as DCLK source for display modes up + * to 4K@60Hz, if available, otherwise keep using the system CRU. + */ + if (vop2->pll_hdmiphy0 && mode->crtc_clock <= VOP2_MAX_DCLK_RATE) { + drm_for_each_encoder_mask(encoder, crtc->dev, crtc_state->encoder_mask) { + struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder); + + if (rkencoder->crtc_endpoint_id == ROCKCHIP_VOP2_EP_HDMI0) { + if (!vp->dclk_src) + vp->dclk_src = clk_get_parent(vp->dclk); + + ret = clk_set_parent(vp->dclk, vop2->pll_hdmiphy0); + if (ret < 0) + drm_warn(vop2->drm, + "Could not switch to HDMI0 PHY PLL: %d\n", ret); + break; + } + } + } + clk_set_rate(vp->dclk, clock); vop2_post_config(crtc); @@ -3699,6 +3727,12 @@ static int vop2_bind(struct device *dev, struct device *master, void *data) return PTR_ERR(vop2->pclk); } + vop2->pll_hdmiphy0 = devm_clk_get_optional(vop2->dev, "pll_hdmiphy0"); + if (IS_ERR(vop2->pll_hdmiphy0)) { + drm_err(vop2->drm, "failed to get pll_hdmiphy0\n"); + return PTR_ERR(vop2->pll_hdmiphy0); + } + vop2->irq = platform_get_irq(pdev, 0); if (vop2->irq < 0) { drm_err(vop2->drm, "cannot find irq for vop2\n"); -- 2.49.0