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Message-ID: <20210305214802.GA701567@robh.at.kernel.org>
Date: Fri, 5 Mar 2021 15:48:02 -0600
From: Rob Herring <robh@...nel.org>
To: Jonathan Marek <jonathan@...ek.ca>
Cc: freedreno@...ts.freedesktop.org, Rob Clark <robdclark@...il.com>,
Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Douglas Anderson <dianders@...omium.org>,
Kalyan Thota <kalyan_t@...eaurora.org>,
Jordan Crouse <jcrouse@...eaurora.org>,
"Kristian H. Kristensen" <hoegsberg@...gle.com>,
Sam Ravnborg <sam@...nborg.org>,
Rikard Falkeborn <rikard.falkeborn@...il.com>,
Emil Velikov <emil.velikov@...labora.com>,
Viresh Kumar <viresh.kumar@...aro.org>,
Rajendra Nayak <rnayak@...eaurora.org>,
Konrad Dybcio <konradybcio@...il.com>,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
Dave Airlie <airlied@...hat.com>,
"open list:DRM DRIVER FOR MSM ADRENO GPU"
<linux-arm-msm@...r.kernel.org>,
"open list:DRM DRIVER FOR MSM ADRENO GPU"
<dri-devel@...ts.freedesktop.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@...r.kernel.org>,
open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/msm/dsi: support CPHY mode for 7nm pll/phy
On Mon, Feb 15, 2021 at 11:27:44AM -0500, Jonathan Marek wrote:
> Add the required changes to support 7nm pll/phy in CPHY mode.
>
> This adds a "qcom,dsi-phy-cphy-mode" property for the PHY node to enable
> the CPHY mode.
>
> Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
> ---
> .../devicetree/bindings/display/msm/dsi.txt | 1 +
> drivers/gpu/drm/msm/dsi/dsi.c | 12 +--
> drivers/gpu/drm/msm/dsi/dsi.h | 6 +-
> drivers/gpu/drm/msm/dsi/dsi.xml.h | 2 +
> drivers/gpu/drm/msm/dsi/dsi_host.c | 34 +++++--
> drivers/gpu/drm/msm/dsi/phy/dsi_phy.c | 49 +++++++++-
> drivers/gpu/drm/msm/dsi/phy/dsi_phy.h | 3 +
> drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c | 89 ++++++++++++++-----
> drivers/gpu/drm/msm/dsi/pll/dsi_pll.c | 4 +-
> drivers/gpu/drm/msm/dsi/pll/dsi_pll.h | 5 +-
> drivers/gpu/drm/msm/dsi/pll/dsi_pll_7nm.c | 71 +++++++++------
> 11 files changed, 210 insertions(+), 66 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/display/msm/dsi.txt b/Documentation/devicetree/bindings/display/msm/dsi.txt
> index b9a64d3ff184..7ffc86a9816b 100644
> --- a/Documentation/devicetree/bindings/display/msm/dsi.txt
> +++ b/Documentation/devicetree/bindings/display/msm/dsi.txt
> @@ -124,6 +124,7 @@ Required properties:
> Optional properties:
> - qcom,dsi-phy-regulator-ldo-mode: Boolean value indicating if the LDO mode PHY
> regulator is wanted.
> +- qcom,dsi-phy-cphy-mode: Boolean value indicating if CPHY mode is wanted.
This is board or SoC dependent? The latter should be implied by an SoC
specific compatible.
> - qcom,mdss-mdp-transfer-time-us: Specifies the dsi transfer time for command mode
> panels in microseconds. Driver uses this number to adjust
> the clock rate according to the expected transfer time.
> diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c
> index 627048851d99..68d8547f7264 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi.c
> @@ -13,7 +13,7 @@ struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi)
> return msm_dsi->encoder;
> }
>
> -static int dsi_get_phy(struct msm_dsi *msm_dsi)
> +static int dsi_get_phy(struct msm_dsi *msm_dsi, bool *cphy_mode)
> {
> struct platform_device *pdev = msm_dsi->pdev;
> struct platform_device *phy_pdev;
> @@ -29,6 +29,7 @@ static int dsi_get_phy(struct msm_dsi *msm_dsi)
> if (phy_pdev)
> msm_dsi->phy = platform_get_drvdata(phy_pdev);
>
> + *cphy_mode = of_property_read_bool(phy_node, "qcom,dsi-phy-cphy-mode");
> of_node_put(phy_node);
>
> if (!phy_pdev || !msm_dsi->phy) {
> @@ -65,6 +66,7 @@ static void dsi_destroy(struct msm_dsi *msm_dsi)
> static struct msm_dsi *dsi_init(struct platform_device *pdev)
> {
> struct msm_dsi *msm_dsi;
> + bool cphy_mode;
> int ret;
>
> if (!pdev)
> @@ -79,13 +81,13 @@ static struct msm_dsi *dsi_init(struct platform_device *pdev)
> msm_dsi->pdev = pdev;
> platform_set_drvdata(pdev, msm_dsi);
>
> - /* Init dsi host */
> - ret = msm_dsi_host_init(msm_dsi);
> + /* GET dsi PHY */
> + ret = dsi_get_phy(msm_dsi, &cphy_mode);
> if (ret)
> goto destroy_dsi;
>
> - /* GET dsi PHY */
> - ret = dsi_get_phy(msm_dsi);
> + /* Init dsi host */
> + ret = msm_dsi_host_init(msm_dsi, cphy_mode);
> if (ret)
> goto destroy_dsi;
>
> diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h
> index 78ef5d4ed922..8db4edc286ee 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi.h
> +++ b/drivers/gpu/drm/msm/dsi/dsi.h
> @@ -108,7 +108,7 @@ struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi);
> struct msm_dsi_pll;
> #ifdef CONFIG_DRM_MSM_DSI_PLL
> struct msm_dsi_pll *msm_dsi_pll_init(struct platform_device *pdev,
> - enum msm_dsi_phy_type type, int dsi_id);
> + enum msm_dsi_phy_type type, bool cphy_mode, int id);
> void msm_dsi_pll_destroy(struct msm_dsi_pll *pll);
> int msm_dsi_pll_get_clk_provider(struct msm_dsi_pll *pll,
> struct clk **byte_clk_provider, struct clk **pixel_clk_provider);
> @@ -118,7 +118,7 @@ int msm_dsi_pll_set_usecase(struct msm_dsi_pll *pll,
> enum msm_dsi_phy_usecase uc);
> #else
> static inline struct msm_dsi_pll *msm_dsi_pll_init(struct platform_device *pdev,
> - enum msm_dsi_phy_type type, int id) {
> + enum msm_dsi_phy_type type, bool cphy_mode, int id) {
> return ERR_PTR(-ENODEV);
> }
> static inline void msm_dsi_pll_destroy(struct msm_dsi_pll *pll)
> @@ -177,7 +177,7 @@ void msm_dsi_host_get_phy_clk_req(struct mipi_dsi_host *host,
> void msm_dsi_host_destroy(struct mipi_dsi_host *host);
> int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
> struct drm_device *dev);
> -int msm_dsi_host_init(struct msm_dsi *msm_dsi);
> +int msm_dsi_host_init(struct msm_dsi *msm_dsi, bool cphy_mode);
> int msm_dsi_runtime_suspend(struct device *dev);
> int msm_dsi_runtime_resume(struct device *dev);
> int dsi_link_clk_set_rate_6g(struct msm_dsi_host *msm_host);
> diff --git a/drivers/gpu/drm/msm/dsi/dsi.xml.h b/drivers/gpu/drm/msm/dsi/dsi.xml.h
> index 50eb4d1b8fdd..5087a65d3e11 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi.xml.h
> +++ b/drivers/gpu/drm/msm/dsi/dsi.xml.h
> @@ -621,6 +621,8 @@ static inline uint32_t DSI_VERSION_MAJOR(uint32_t val)
> return ((val) << DSI_VERSION_MAJOR__SHIFT) & DSI_VERSION_MAJOR__MASK;
> }
>
> +#define REG_DSI_CPHY_MODE_CTRL 0x000002d4
> +
> #define REG_DSI_PHY_PLL_CTRL_0 0x00000200
> #define DSI_PHY_PLL_CTRL_0_ENABLE 0x00000001
>
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
> index ab281cba0f08..39346817a27a 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> @@ -168,6 +168,9 @@ struct msm_dsi_host {
> int dlane_swap;
> int num_data_lanes;
>
> + /* from phy DT */
> + bool cphy_mode;
> +
> u32 dma_cmd_ctrl_restore;
>
> bool registered;
> @@ -511,6 +514,7 @@ int msm_dsi_runtime_resume(struct device *dev)
>
> int dsi_link_clk_set_rate_6g(struct msm_dsi_host *msm_host)
> {
> + u32 byte_intf_rate;
> int ret;
>
> DBG("Set clk rates: pclk=%d, byteclk=%d",
> @@ -530,8 +534,13 @@ int dsi_link_clk_set_rate_6g(struct msm_dsi_host *msm_host)
> }
>
> if (msm_host->byte_intf_clk) {
> - ret = clk_set_rate(msm_host->byte_intf_clk,
> - msm_host->byte_clk_rate / 2);
> + /* For CPHY, byte_intf_clk is same as byte_clk */
> + if (msm_host->cphy_mode)
> + byte_intf_rate = msm_host->byte_clk_rate;
> + else
> + byte_intf_rate = msm_host->byte_clk_rate / 2;
> +
> + ret = clk_set_rate(msm_host->byte_intf_clk, byte_intf_rate);
> if (ret) {
> pr_err("%s: Failed to set rate byte intf clk, %d\n",
> __func__, ret);
> @@ -711,7 +720,11 @@ static void dsi_calc_pclk(struct msm_dsi_host *msm_host, bool is_dual_dsi)
> lanes = 1;
> }
>
> - do_div(pclk_bpp, (8 * lanes));
> + /* CPHY "byte_clk" is in units of 16 bits */
> + if (msm_host->cphy_mode)
> + do_div(pclk_bpp, (16 * lanes));
> + else
> + do_div(pclk_bpp, (8 * lanes));
>
> msm_host->pixel_clk_rate = pclk_rate;
> msm_host->byte_clk_rate = pclk_bpp;
> @@ -937,6 +950,9 @@ static void dsi_ctrl_config(struct msm_dsi_host *msm_host, bool enable,
> data |= DSI_CTRL_ENABLE;
>
> dsi_write(msm_host, REG_DSI_CTRL, data);
> +
> + if (msm_host->cphy_mode)
> + dsi_write(msm_host, REG_DSI_CPHY_MODE_CTRL, BIT(0));
> }
>
> static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_dual_dsi)
> @@ -1818,7 +1834,7 @@ static int dsi_host_get_id(struct msm_dsi_host *msm_host)
> return -EINVAL;
> }
>
> -int msm_dsi_host_init(struct msm_dsi *msm_dsi)
> +int msm_dsi_host_init(struct msm_dsi *msm_dsi, bool cphy_mode)
> {
> struct msm_dsi_host *msm_host = NULL;
> struct platform_device *pdev = msm_dsi->pdev;
> @@ -1833,6 +1849,7 @@ int msm_dsi_host_init(struct msm_dsi *msm_dsi)
> }
>
> msm_host->pdev = pdev;
> + msm_host->cphy_mode = cphy_mode;
> msm_dsi->host = &msm_host->base;
>
> ret = dsi_host_parse_dt(msm_host);
> @@ -2303,7 +2320,14 @@ void msm_dsi_host_get_phy_clk_req(struct mipi_dsi_host *host,
> return;
> }
>
> - clk_req->bitclk_rate = msm_host->byte_clk_rate * 8;
> + /* CPHY transmits 16 bits over 7 clock cycles
> + * "byte_clk" is in units of 16-bits (see dsi_calc_pclk),
> + * so multiply by 7 to get the "bitclk rate"
> + */
> + if (msm_host->cphy_mode)
> + clk_req->bitclk_rate = msm_host->byte_clk_rate * 7;
> + else
> + clk_req->bitclk_rate = msm_host->byte_clk_rate * 8;
> clk_req->escclk_rate = msm_host->esc_clk_rate;
> }
>
> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
> index e8c1a727179c..c8b758ab259a 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
> @@ -460,6 +460,51 @@ int msm_dsi_dphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
> return 0;
> }
>
> +int msm_dsi_cphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
> + struct msm_dsi_phy_clk_request *clk_req)
> +{
> + const unsigned long bit_rate = clk_req->bitclk_rate;
> + const unsigned long esc_rate = clk_req->escclk_rate;
> + s32 ui, ui_x7;
> + s32 tmax, tmin;
> + s32 coeff = 1000; /* Precision, should avoid overflow */
> + s32 temp;
> +
> + if (!bit_rate || !esc_rate)
> + return -EINVAL;
> +
> + ui = mult_frac(NSEC_PER_MSEC, coeff, bit_rate / 1000);
> + ui_x7 = ui * 7;
> +
> + temp = S_DIV_ROUND_UP(38 * coeff, ui_x7);
> + tmin = max_t(s32, temp, 0);
> + temp = (95 * coeff) / ui_x7;
> + tmax = max_t(s32, temp, 0);
> + timing->clk_prepare = linear_inter(tmax, tmin, 50, 0, false);
> +
> + tmin = DIV_ROUND_UP(50 * coeff, ui_x7);
> + tmax = 255;
> + timing->hs_rqst = linear_inter(tmax, tmin, 1, 0, false);
> +
> + tmin = DIV_ROUND_UP(100 * coeff, ui_x7) - 1;
> + tmax = 255;
> + timing->hs_exit = linear_inter(tmax, tmin, 10, 0, false);
> +
> + tmin = 1;
> + tmax = 32;
> + timing->shared_timings.clk_post = linear_inter(tmax, tmin, 80, 0, false);
> +
> + tmin = min_t(s32, 64, S_DIV_ROUND_UP(262 * coeff, ui_x7) - 1);
> + tmax = 64;
> + timing->shared_timings.clk_pre = linear_inter(tmax, tmin, 20, 0, false);
> +
> + DBG("%d, %d, %d, %d, %d",
> + timing->shared_timings.clk_pre, timing->shared_timings.clk_post,
> + timing->clk_prepare, timing->hs_exit, timing->hs_rqst);
> +
> + return 0;
> +}
> +
> void msm_dsi_phy_set_src_pll(struct msm_dsi_phy *phy, int pll_id, u32 reg,
> u32 bit_mask)
> {
> @@ -683,6 +728,8 @@ static int dsi_phy_driver_probe(struct platform_device *pdev)
>
> phy->regulator_ldo_mode = of_property_read_bool(dev->of_node,
> "qcom,dsi-phy-regulator-ldo-mode");
> + phy->cphy_mode = of_property_read_bool(dev->of_node,
> + "qcom,dsi-phy-cphy-mode");
>
> phy->base = msm_ioremap(pdev, "dsi_phy", "DSI_PHY");
> if (IS_ERR(phy->base)) {
> @@ -715,7 +762,7 @@ static int dsi_phy_driver_probe(struct platform_device *pdev)
> if (ret)
> goto fail;
>
> - phy->pll = msm_dsi_pll_init(pdev, phy->cfg->type, phy->id);
> + phy->pll = msm_dsi_pll_init(pdev, phy->cfg->type, phy->cphy_mode, phy->id);
> if (IS_ERR_OR_NULL(phy->pll)) {
> DRM_DEV_INFO(dev,
> "%s: pll init failed: %ld, need separate pll clk driver\n",
> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
> index d2bd74b6f357..699d3d4a8ba8 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
> @@ -89,6 +89,7 @@ struct msm_dsi_phy {
>
> enum msm_dsi_phy_usecase usecase;
> bool regulator_ldo_mode;
> + bool cphy_mode;
>
> struct msm_dsi_pll *pll;
> };
> @@ -104,6 +105,8 @@ int msm_dsi_dphy_timing_calc_v3(struct msm_dsi_dphy_timing *timing,
> struct msm_dsi_phy_clk_request *clk_req);
> int msm_dsi_dphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
> struct msm_dsi_phy_clk_request *clk_req);
> +int msm_dsi_cphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
> + struct msm_dsi_phy_clk_request *clk_req);
> void msm_dsi_phy_set_src_pll(struct msm_dsi_phy *phy, int pll_id, u32 reg,
> u32 bit_mask);
> int msm_dsi_phy_init_common(struct msm_dsi_phy *phy);
> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
> index 79c034ae075d..69291babd871 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
> @@ -79,15 +79,21 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
> struct msm_dsi_dphy_timing *timing = &phy->timing;
> void __iomem *base = phy->base;
> bool less_than_1500_mhz;
> - u32 vreg_ctrl_0, glbl_str_swi_cal_sel_ctrl, glbl_hstx_str_ctrl_0;
> + u32 vreg_ctrl_0, vreg_ctrl_1, lane_ctrl0;
> + u32 glbl_pemph_ctrl_0;
> + u32 glbl_str_swi_cal_sel_ctrl, glbl_hstx_str_ctrl_0;
> u32 glbl_rescode_top_ctrl, glbl_rescode_bot_ctrl;
> u32 data;
>
> DBG("");
>
> - if (msm_dsi_dphy_timing_calc_v4(timing, clk_req)) {
> + if (phy->cphy_mode)
> + ret = msm_dsi_cphy_timing_calc_v4(timing, clk_req);
> + else
> + ret = msm_dsi_dphy_timing_calc_v4(timing, clk_req);
> + if (ret) {
> DRM_DEV_ERROR(&phy->pdev->dev,
> - "%s: D-PHY timing calculation failed\n", __func__);
> + "%s: PHY timing calculation failed\n", __func__);
> return -EINVAL;
> }
>
> @@ -108,6 +114,10 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
> /* Alter PHY configurations if data rate less than 1.5GHZ*/
> less_than_1500_mhz = (clk_req->bitclk_rate <= 1500000000);
>
> + /* For C-PHY, no low power settings for lower clk rate */
> + if (phy->cphy_mode)
> + less_than_1500_mhz = false;
> +
> if (phy->cfg->type == MSM_DSI_PHY_7NM_V4_1) {
> vreg_ctrl_0 = less_than_1500_mhz ? 0x53 : 0x52;
> glbl_rescode_top_ctrl = less_than_1500_mhz ? 0x3d : 0x00;
> @@ -122,6 +132,17 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
> glbl_rescode_bot_ctrl = 0x3c;
> }
>
> + if (phy->cphy_mode) {
> + vreg_ctrl_0 = 0x51;
> + vreg_ctrl_1 = 0x55;
> + glbl_pemph_ctrl_0 = 0x11;
> + lane_ctrl0 = 0x17;
> + } else {
> + vreg_ctrl_1 = 0x5c;
> + glbl_pemph_ctrl_0 = 0x00;
> + lane_ctrl0 = 0x1f;
> + }
> +
> /* de-assert digital and pll power down */
> data = BIT(6) | BIT(5);
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_0, data);
> @@ -142,15 +163,22 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CFG0, 0x21);
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CFG1, 0x84);
>
> + if (phy->cphy_mode)
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_CTRL, BIT(6));
> +
> /* Enable LDO */
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_VREG_CTRL_0, vreg_ctrl_0);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_VREG_CTRL_1, 0x5c);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_VREG_CTRL_1, vreg_ctrl_1);
> +
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_3, 0x00);
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_STR_SWI_CAL_SEL_CTRL,
> glbl_str_swi_cal_sel_ctrl);
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_HSTX_STR_CTRL_0,
> glbl_hstx_str_ctrl_0);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_PEMPH_CTRL_0, 0x00);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_PEMPH_CTRL_0,
> + glbl_pemph_ctrl_0);
> + if (phy->cphy_mode)
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_PEMPH_CTRL_1, 0x01);
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_RESCODE_OFFSET_TOP_CTRL,
> glbl_rescode_top_ctrl);
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_RESCODE_OFFSET_BOT_CTRL,
> @@ -160,10 +188,11 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
> /* Remove power down from all blocks */
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_0, 0x7f);
>
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CTRL0, 0x1f);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CTRL0, lane_ctrl0);
>
> /* Select full-rate mode */
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_2, 0x40);
> + if (!phy->cphy_mode)
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_2, 0x40);
>
> ret = msm_dsi_pll_set_usecase(phy->pll, phy->usecase);
> if (ret) {
> @@ -173,22 +202,36 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
> }
>
> /* DSI PHY timings */
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_0, 0x00);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_1, timing->clk_zero);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_2, timing->clk_prepare);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_3, timing->clk_trail);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_4, timing->hs_exit);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_5, timing->hs_zero);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_6, timing->hs_prepare);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_7, timing->hs_trail);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_8, timing->hs_rqst);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_9, 0x02);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_10, 0x04);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_11, 0x00);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_12,
> - timing->shared_timings.clk_pre);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_13,
> - timing->shared_timings.clk_post);
> + if (phy->cphy_mode) {
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_0, 0x00);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_4, timing->hs_exit);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_5,
> + timing->shared_timings.clk_pre);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_6, timing->clk_prepare);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_7,
> + timing->shared_timings.clk_post);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_8, timing->hs_rqst);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_9, 0x02);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_10, 0x04);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_11, 0x00);
> + } else {
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_0, 0x00);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_1, timing->clk_zero);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_2, timing->clk_prepare);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_3, timing->clk_trail);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_4, timing->hs_exit);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_5, timing->hs_zero);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_6, timing->hs_prepare);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_7, timing->hs_trail);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_8, timing->hs_rqst);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_9, 0x02);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_10, 0x04);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_11, 0x00);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_12,
> + timing->shared_timings.clk_pre);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_13,
> + timing->shared_timings.clk_post);
> + }
>
> /* DSI lane settings */
> dsi_phy_hw_v4_0_lane_settings(phy);
> diff --git a/drivers/gpu/drm/msm/dsi/pll/dsi_pll.c b/drivers/gpu/drm/msm/dsi/pll/dsi_pll.c
> index a45fe95aff49..9ad9a8774982 100644
> --- a/drivers/gpu/drm/msm/dsi/pll/dsi_pll.c
> +++ b/drivers/gpu/drm/msm/dsi/pll/dsi_pll.c
> @@ -142,7 +142,7 @@ int msm_dsi_pll_set_usecase(struct msm_dsi_pll *pll,
> }
>
> struct msm_dsi_pll *msm_dsi_pll_init(struct platform_device *pdev,
> - enum msm_dsi_phy_type type, int id)
> + enum msm_dsi_phy_type type, bool cphy_mode, int id)
> {
> struct device *dev = &pdev->dev;
> struct msm_dsi_pll *pll;
> @@ -163,7 +163,7 @@ struct msm_dsi_pll *msm_dsi_pll_init(struct platform_device *pdev,
> break;
> case MSM_DSI_PHY_7NM:
> case MSM_DSI_PHY_7NM_V4_1:
> - pll = msm_dsi_pll_7nm_init(pdev, id);
> + pll = msm_dsi_pll_7nm_init(pdev, cphy_mode, id);
> break;
> default:
> pll = ERR_PTR(-ENXIO);
> diff --git a/drivers/gpu/drm/msm/dsi/pll/dsi_pll.h b/drivers/gpu/drm/msm/dsi/pll/dsi_pll.h
> index 3405982a092c..d8d3e5b09053 100644
> --- a/drivers/gpu/drm/msm/dsi/pll/dsi_pll.h
> +++ b/drivers/gpu/drm/msm/dsi/pll/dsi_pll.h
> @@ -117,10 +117,11 @@ msm_dsi_pll_10nm_init(struct platform_device *pdev, int id)
> }
> #endif
> #ifdef CONFIG_DRM_MSM_DSI_7NM_PHY
> -struct msm_dsi_pll *msm_dsi_pll_7nm_init(struct platform_device *pdev, int id);
> +struct msm_dsi_pll *
> +msm_dsi_pll_7nm_init(struct platform_device *pdev, bool cphy_mode, int id);
> #else
> static inline struct msm_dsi_pll *
> -msm_dsi_pll_7nm_init(struct platform_device *pdev, int id)
> +msm_dsi_pll_7nm_init(struct platform_device *pdev, bool cphy_mode, int id)
> {
> return ERR_PTR(-ENODEV);
> }
> diff --git a/drivers/gpu/drm/msm/dsi/pll/dsi_pll_7nm.c b/drivers/gpu/drm/msm/dsi/pll/dsi_pll_7nm.c
> index 93bf142e4a4e..edc1fb491bc7 100644
> --- a/drivers/gpu/drm/msm/dsi/pll/dsi_pll_7nm.c
> +++ b/drivers/gpu/drm/msm/dsi/pll/dsi_pll_7nm.c
> @@ -86,6 +86,7 @@ struct pll_7nm_cached_state {
>
> struct dsi_pll_7nm {
> struct msm_dsi_pll base;
> + bool cphy_mode;
>
> int id;
> struct platform_device *pdev;
> @@ -327,7 +328,7 @@ static void dsi_pll_commit(struct dsi_pll_7nm *pll)
> pll_write(base + REG_DSI_7nm_PHY_PLL_FRAC_DIV_START_HIGH_1, reg->frac_div_start_high);
> pll_write(base + REG_DSI_7nm_PHY_PLL_PLL_LOCKDET_RATE_1, 0x40);
> pll_write(base + REG_DSI_7nm_PHY_PLL_PLL_LOCK_DELAY, 0x06);
> - pll_write(base + REG_DSI_7nm_PHY_PLL_CMODE_1, 0x10); /* TODO: 0x00 for CPHY */
> + pll_write(base + REG_DSI_7nm_PHY_PLL_CMODE_1, pll->cphy_mode ? 0x00 : 0x10);
> pll_write(base + REG_DSI_7nm_PHY_PLL_CLOCK_INVERTERS, reg->pll_clock_inverters);
> }
>
> @@ -668,7 +669,8 @@ static void dsi_pll_7nm_destroy(struct msm_dsi_pll *pll)
> of_clk_del_provider(dev->of_node);
>
> clk_hw_unregister_divider(pll_7nm->out_dsiclk_hw);
> - clk_hw_unregister_mux(pll_7nm->pclk_mux_hw);
> + if (pll_7nm->pclk_mux_hw)
> + clk_hw_unregister_mux(pll_7nm->pclk_mux_hw);
> clk_hw_unregister_fixed_factor(pll_7nm->post_out_div_clk_hw);
> clk_hw_unregister_fixed_factor(pll_7nm->by_2_bit_clk_hw);
> clk_hw_unregister_fixed_factor(pll_7nm->byte_clk_hw);
> @@ -751,7 +753,8 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm)
>
> /* DSI Byte clock = VCO_CLK / OUT_DIV / BIT_DIV / 8 */
> hw = clk_hw_register_fixed_factor(dev, clk_name, parent,
> - CLK_SET_RATE_PARENT, 1, 8);
> + CLK_SET_RATE_PARENT, 1,
> + pll_7nm->cphy_mode ? 7 : 8);
> if (IS_ERR(hw)) {
> ret = PTR_ERR(hw);
> goto err_bit_clk_hw;
> @@ -775,8 +778,10 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm)
> snprintf(clk_name, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->id);
> snprintf(parent, 32, "dsi%d_pll_out_div_clk", pll_7nm->id);
>
> - hw = clk_hw_register_fixed_factor(dev, clk_name, parent,
> - 0, 1, 4);
> + if (pll_7nm->cphy_mode)
> + hw = clk_hw_register_fixed_factor(dev, clk_name, parent, 0, 2, 7);
> + else
> + hw = clk_hw_register_fixed_factor(dev, clk_name, parent, 0, 1, 4);
> if (IS_ERR(hw)) {
> ret = PTR_ERR(hw);
> goto err_by_2_bit_clk_hw;
> @@ -784,27 +789,40 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm)
>
> pll_7nm->post_out_div_clk_hw = hw;
>
> - snprintf(clk_name, 32, "dsi%d_pclk_mux", pll_7nm->id);
> - snprintf(parent, 32, "dsi%d_pll_bit_clk", pll_7nm->id);
> - snprintf(parent2, 32, "dsi%d_pll_by_2_bit_clk", pll_7nm->id);
> - snprintf(parent3, 32, "dsi%d_pll_out_div_clk", pll_7nm->id);
> - snprintf(parent4, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->id);
> -
> - hw = clk_hw_register_mux(dev, clk_name,
> - ((const char *[]){
> - parent, parent2, parent3, parent4
> - }), 4, 0, pll_7nm->phy_cmn_mmio +
> - REG_DSI_7nm_PHY_CMN_CLK_CFG1,
> - 0, 2, 0, NULL);
> - if (IS_ERR(hw)) {
> - ret = PTR_ERR(hw);
> - goto err_post_out_div_clk_hw;
> + /* in CPHY mode, pclk_mux will always have post_out_div as parent
> + * don't register a pclk_mux clock and just use post_out_div instead
> + */
> + if (pll_7nm->cphy_mode) {
> + void __iomem *base = pll_7nm->phy_cmn_mmio;
> + u32 data;
> +
> + data = pll_read(base + REG_DSI_7nm_PHY_CMN_CLK_CFG1);
> + pll_write(base + REG_DSI_7nm_PHY_CMN_CLK_CFG1, data | 3);
> +
> + snprintf(parent, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->id);
> + } else {
> + snprintf(clk_name, 32, "dsi%d_pclk_mux", pll_7nm->id);
> + snprintf(parent, 32, "dsi%d_pll_bit_clk", pll_7nm->id);
> + snprintf(parent2, 32, "dsi%d_pll_by_2_bit_clk", pll_7nm->id);
> + snprintf(parent3, 32, "dsi%d_pll_out_div_clk", pll_7nm->id);
> + snprintf(parent4, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->id);
> +
> + hw = clk_hw_register_mux(dev, clk_name,
> + ((const char *[]){
> + parent, parent2, parent3, parent4
> + }), 4, 0, pll_7nm->phy_cmn_mmio +
> + REG_DSI_7nm_PHY_CMN_CLK_CFG1,
> + 0, 2, 0, NULL);
> + if (IS_ERR(hw)) {
> + ret = PTR_ERR(hw);
> + goto err_post_out_div_clk_hw;
> + }
> +
> + pll_7nm->pclk_mux_hw = hw;
> + snprintf(parent, 32, "dsi%d_pclk_mux", pll_7nm->id);
> }
>
> - pll_7nm->pclk_mux_hw = hw;
> -
> snprintf(clk_name, 32, "dsi%d_phy_pll_out_dsiclk", pll_7nm->id);
> - snprintf(parent, 32, "dsi%d_pclk_mux", pll_7nm->id);
>
> /* PIX CLK DIV : DIV_CTRL_7_4*/
> hw = clk_hw_register_divider(dev, clk_name, parent,
> @@ -835,7 +853,8 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm)
> err_dsiclk_hw:
> clk_hw_unregister_divider(pll_7nm->out_dsiclk_hw);
> err_pclk_mux_hw:
> - clk_hw_unregister_mux(pll_7nm->pclk_mux_hw);
> + if (pll_7nm->pclk_mux_hw)
> + clk_hw_unregister_mux(pll_7nm->pclk_mux_hw);
> err_post_out_div_clk_hw:
> clk_hw_unregister_fixed_factor(pll_7nm->post_out_div_clk_hw);
> err_by_2_bit_clk_hw:
> @@ -852,7 +871,8 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm)
> return ret;
> }
>
> -struct msm_dsi_pll *msm_dsi_pll_7nm_init(struct platform_device *pdev, int id)
> +struct msm_dsi_pll *
> +msm_dsi_pll_7nm_init(struct platform_device *pdev, bool cphy_mode, int id)
> {
> struct dsi_pll_7nm *pll_7nm;
> struct msm_dsi_pll *pll;
> @@ -865,6 +885,7 @@ struct msm_dsi_pll *msm_dsi_pll_7nm_init(struct platform_device *pdev, int id)
> DBG("DSI PLL%d", id);
>
> pll_7nm->pdev = pdev;
> + pll_7nm->cphy_mode = cphy_mode;
> pll_7nm->id = id;
> pll_7nm_list[id] = pll_7nm;
>
> --
> 2.26.1
>
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