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Message-ID: <20170123173006.GA25789@trickycodes.roam.corp.google.com>
Date: Mon, 23 Jan 2017 12:30:06 -0500
From: Sean Paul <seanpaul@...omium.org>
To: Chris Zhong <zyw@...k-chips.com>
Cc: dianders@...omium.org, tfiga@...omium.org, heiko@...ech.de,
yzq@...k-chips.com, mark.rutland@....com,
devicetree@...r.kernel.org, robh+dt@...nel.org,
galak@...eaurora.org, pawel.moll@....com,
linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
linux-rockchip@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 2/5] drm/rockchip/dsi: dw-mipi: support RK3399 mipi dsi
On Fri, Jan 20, 2017 at 06:10:48PM +0800, Chris Zhong wrote:
> The vopb/vopl switch register of RK3399 mipi is different from RK3288,
> the default setting for mipi dsi mode is different too, so add a
> of_device_id structure to distinguish them, and make sure set the
> correct mode before mipi phy init.
>
Hi Chris,
There are a bunch of unrelated changes in this patch. Can you please split out
the whitespace/const changes into a separate clean-up patch so it's easier to
see the meaningful changes?
More comments below.
> Signed-off-by: Chris Zhong <zyw@...k-chips.com>
> Signed-off-by: Mark Yao <mark.yao@...k-chips.com>
> ---
>
> Changes in v3:
> - base on John Keeping's patch series
>
> drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 101 ++++++++++++++++++++++++---------
> 1 file changed, 74 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> index 45af890..a93ce97 100644
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> @@ -29,9 +29,17 @@
>
> #define DRIVER_NAME "dw-mipi-dsi"
>
> -#define GRF_SOC_CON6 0x025c
> -#define DSI0_SEL_VOP_LIT (1 << 6)
> -#define DSI1_SEL_VOP_LIT (1 << 9)
> +#define RK3288_GRF_SOC_CON6 0x025c
> +#define RK3288_DSI0_SEL_VOP_LIT BIT(6)
> +#define RK3288_DSI1_SEL_VOP_LIT BIT(9)
> +
> +#define RK3399_GRF_SOC_CON19 0x6250
> +#define RK3399_DSI0_SEL_VOP_LIT BIT(0)
> +#define RK3399_DSI1_SEL_VOP_LIT BIT(4)
> +
> +/* disable turnrequest, turndisable, forcetxstopmode, forcerxmode */
> +#define RK3399_GRF_SOC_CON22 0x6258
> +#define RK3399_GRF_DSI_MODE 0xffff0000
>
> #define DSI_VERSION 0x00
> #define DSI_PWR_UP 0x04
> @@ -149,7 +157,6 @@
> #define LPRX_TO_CNT(p) ((p) & 0xffff)
>
> #define DSI_BTA_TO_CNT 0x8c
> -
Unrelated whitespace change
> #define DSI_LPCLK_CTRL 0x94
> #define AUTO_CLKLANE_CTRL BIT(1)
> #define PHY_TXREQUESTCLKHS BIT(0)
> @@ -215,11 +222,11 @@
>
> #define HSFREQRANGE_SEL(val) (((val) & 0x3f) << 1)
>
> -#define INPUT_DIVIDER(val) ((val - 1) & 0x7f)
> +#define INPUT_DIVIDER(val) (((val) - 1) & 0x7f)
Unrelated change
> #define LOW_PROGRAM_EN 0
> #define HIGH_PROGRAM_EN BIT(7)
> -#define LOOP_DIV_LOW_SEL(val) ((val - 1) & 0x1f)
> -#define LOOP_DIV_HIGH_SEL(val) (((val - 1) >> 5) & 0x1f)
> +#define LOOP_DIV_LOW_SEL(val) (((val) - 1) & 0x1f)
> +#define LOOP_DIV_HIGH_SEL(val) ((((val) - 1) >> 5) & 0x1f)
This change doesn't adversely affect other platforms?
> #define PLL_LOOP_DIV_EN BIT(5)
> #define PLL_INPUT_DIV_EN BIT(4)
>
> @@ -265,6 +272,11 @@ enum {
> };
>
> struct dw_mipi_dsi_plat_data {
> + u32 dsi0_en_bit;
> + u32 dsi1_en_bit;
> + u32 grf_switch_reg;
> + u32 grf_dsi0_mode;
> + u32 grf_dsi0_mode_reg;
> unsigned int max_data_lanes;
> enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
> struct drm_display_mode *mode);
> @@ -281,6 +293,7 @@ struct dw_mipi_dsi {
>
> struct clk *pllref_clk;
> struct clk *pclk;
> + struct clk *phy_cfg_clk;
>
> unsigned int lane_mbps; /* per lane */
> u32 channel;
> @@ -356,6 +369,7 @@ static inline struct dw_mipi_dsi *encoder_to_dsi(struct drm_encoder *encoder)
> {
> return container_of(encoder, struct dw_mipi_dsi, encoder);
> }
> +
> static inline void dsi_write(struct dw_mipi_dsi *dsi, u32 reg, u32 val)
> {
> writel(val, dsi->base + reg);
> @@ -367,7 +381,7 @@ static inline u32 dsi_read(struct dw_mipi_dsi *dsi, u32 reg)
> }
>
> static void dw_mipi_dsi_phy_write(struct dw_mipi_dsi *dsi, u8 test_code,
> - u8 test_data)
> + u8 test_data)
Unrelated whitespace change
> {
> /*
> * With the falling edge on TESTCLK, the TESTDIN[7:0] signal content
> @@ -426,6 +440,14 @@ static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi)
> dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLR);
> dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR);
>
> + if (!IS_ERR(dsi->phy_cfg_clk)) {
> + ret = clk_prepare_enable(dsi->phy_cfg_clk);
> + if (ret) {
> + dev_err(dsi->dev, "Failed to enable phy_cfg_clk\n");
> + return ret;
> + }
> + }
> +
> dw_mipi_dsi_phy_write(dsi, 0x10, BYPASS_VCO_RANGE |
> VCO_RANGE_CON_SEL(vco) |
> VCO_IN_CAP_CON_LOW |
> @@ -474,22 +496,23 @@ static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi)
> dsi_write(dsi, DSI_PHY_RSTZ, PHY_ENFORCEPLL | PHY_ENABLECLK |
> PHY_UNRSTZ | PHY_UNSHUTDOWNZ);
>
> -
> ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS,
> val, val & LOCK, 1000, PHY_STATUS_TIMEOUT_US);
> if (ret < 0) {
> dev_err(dsi->dev, "failed to wait for phy lock state\n");
> - return ret;
> + goto phy_init_end;
> }
>
> ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS,
> val, val & STOP_STATE_CLK_LANE, 1000,
> PHY_STATUS_TIMEOUT_US);
> - if (ret < 0) {
> + if (ret < 0)
> dev_err(dsi->dev,
> "failed to wait for phy clk lane stop state\n");
> - return ret;
> - }
> +
> +phy_init_end:
> + if (!IS_ERR(dsi->phy_cfg_clk))
> + clk_disable_unprepare(dsi->phy_cfg_clk);
>
> return ret;
> }
> @@ -548,7 +571,7 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
>
> if (device->lanes > dsi->pdata->max_data_lanes) {
> dev_err(dsi->dev, "the number of data lanes(%u) is too many\n",
> - device->lanes);
> + device->lanes);
Unrelated whitespace change
> return -EINVAL;
> }
>
> @@ -936,8 +959,8 @@ static void dw_mipi_dsi_clear_err(struct dw_mipi_dsi *dsi)
> }
>
> static void dw_mipi_dsi_encoder_mode_set(struct drm_encoder *encoder,
> - struct drm_display_mode *mode,
> - struct drm_display_mode *adjusted_mode)
> + struct drm_display_mode *mode,
> + struct drm_display_mode *adjusted_mode)
Unrelated whitespace change
> {
> struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
>
> @@ -965,6 +988,7 @@ static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder)
> static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
> {
> struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
> + const struct dw_mipi_dsi_plat_data *pdata = dsi->pdata;
> int mux = drm_of_encoder_active_endpoint_id(dsi->dev->of_node, encoder);
> u32 val;
>
> @@ -985,6 +1009,10 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
> dw_mipi_dsi_dphy_interface_config(dsi);
> dw_mipi_dsi_clear_err(dsi);
>
> + if (pdata->grf_dsi0_mode_reg)
> + regmap_write(dsi->grf_regmap, pdata->grf_dsi0_mode_reg,
> + pdata->grf_dsi0_mode);
> +
> dw_mipi_dsi_phy_init(dsi);
> dw_mipi_dsi_wait_for_two_frames(dsi);
>
> @@ -998,11 +1026,11 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
> clk_disable_unprepare(dsi->pclk);
>
> if (mux)
> - val = DSI0_SEL_VOP_LIT | (DSI0_SEL_VOP_LIT << 16);
> + val = pdata->dsi0_en_bit | (pdata->dsi0_en_bit << 16);
> else
> - val = DSI0_SEL_VOP_LIT << 16;
> + val = pdata->dsi0_en_bit << 16;
>
> - regmap_write(dsi->grf_regmap, GRF_SOC_CON6, val);
> + regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val);
> dev_dbg(dsi->dev, "vop %s output to dsi0\n", (mux) ? "LIT" : "BIG");
> }
>
> @@ -1034,7 +1062,7 @@ dw_mipi_dsi_encoder_atomic_check(struct drm_encoder *encoder,
> return 0;
> }
>
> -static struct drm_encoder_helper_funcs
> +static const struct drm_encoder_helper_funcs
> dw_mipi_dsi_encoder_helper_funcs = {
> .enable = dw_mipi_dsi_encoder_enable,
> .mode_set = dw_mipi_dsi_encoder_mode_set,
> @@ -1042,7 +1070,7 @@ dw_mipi_dsi_encoder_helper_funcs = {
> .atomic_check = dw_mipi_dsi_encoder_atomic_check,
> };
>
> -static struct drm_encoder_funcs dw_mipi_dsi_encoder_funcs = {
> +static const struct drm_encoder_funcs dw_mipi_dsi_encoder_funcs = {
> .destroy = drm_encoder_cleanup,
> };
>
> @@ -1078,7 +1106,7 @@ static void dw_mipi_dsi_drm_connector_destroy(struct drm_connector *connector)
> drm_connector_cleanup(connector);
> }
>
> -static struct drm_connector_funcs dw_mipi_dsi_atomic_connector_funcs = {
> +static const struct drm_connector_funcs dw_mipi_dsi_atomic_connector_funcs = {
These 3 const changes are unrelated to the patch
> .dpms = drm_atomic_helper_connector_dpms,
> .fill_modes = drm_helper_probe_single_connector_modes,
> .destroy = dw_mipi_dsi_drm_connector_destroy,
> @@ -1088,7 +1116,7 @@ static struct drm_connector_funcs dw_mipi_dsi_atomic_connector_funcs = {
> };
>
> static int dw_mipi_dsi_register(struct drm_device *drm,
> - struct dw_mipi_dsi *dsi)
> + struct dw_mipi_dsi *dsi)
Unrelated whitespace change
> {
> struct drm_encoder *encoder = &dsi->encoder;
> struct drm_connector *connector = &dsi->connector;
> @@ -1109,14 +1137,14 @@ static int dw_mipi_dsi_register(struct drm_device *drm,
> drm_encoder_helper_add(&dsi->encoder,
> &dw_mipi_dsi_encoder_helper_funcs);
> ret = drm_encoder_init(drm, &dsi->encoder, &dw_mipi_dsi_encoder_funcs,
> - DRM_MODE_ENCODER_DSI, NULL);
> + DRM_MODE_ENCODER_DSI, NULL);
Unrelated whitespace change
> if (ret) {
> dev_err(dev, "Failed to initialize encoder with drm\n");
> return ret;
> }
>
> drm_connector_helper_add(connector,
> - &dw_mipi_dsi_connector_helper_funcs);
> + &dw_mipi_dsi_connector_helper_funcs);
Unrelated whitespace change
>
> drm_connector_init(drm, &dsi->connector,
> &dw_mipi_dsi_atomic_connector_funcs,
> @@ -1162,21 +1190,36 @@ static enum drm_mode_status rk3288_mipi_dsi_mode_valid(
> }
>
> static struct dw_mipi_dsi_plat_data rk3288_mipi_dsi_drv_data = {
> + .dsi0_en_bit = RK3288_DSI0_SEL_VOP_LIT,
> + .dsi1_en_bit = RK3288_DSI1_SEL_VOP_LIT,
> + .grf_switch_reg = RK3288_GRF_SOC_CON6,
> .max_data_lanes = 4,
> .mode_valid = rk3288_mipi_dsi_mode_valid,
> };
>
> +static struct dw_mipi_dsi_plat_data rk3399_mipi_dsi_drv_data = {
> + .dsi0_en_bit = RK3399_DSI0_SEL_VOP_LIT,
> + .dsi1_en_bit = RK3399_DSI1_SEL_VOP_LIT,
> + .grf_switch_reg = RK3399_GRF_SOC_CON19,
> + .grf_dsi0_mode = RK3399_GRF_DSI_MODE,
> + .grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
> + .max_data_lanes = 4,
> +};
> +
> static const struct of_device_id dw_mipi_dsi_dt_ids[] = {
> {
> .compatible = "rockchip,rk3288-mipi-dsi",
> .data = &rk3288_mipi_dsi_drv_data,
> + }, {
> + .compatible = "rockchip,rk3399-mipi-dsi",
> + .data = &rk3399_mipi_dsi_drv_data,
> },
> { /* sentinel */ }
> };
> MODULE_DEVICE_TABLE(of, dw_mipi_dsi_dt_ids);
>
> static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
> - void *data)
> + void *data)
Unrelated whitespace change
> {
> const struct of_device_id *of_id =
> of_match_device(dw_mipi_dsi_dt_ids, dev);
> @@ -1249,6 +1292,10 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
> clk_disable_unprepare(dsi->pclk);
> }
>
> + dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg");
> + if (IS_ERR(dsi->phy_cfg_clk))
> + dev_dbg(dev, "have not phy_cfg_clk\n");
> +
> ret = clk_prepare_enable(dsi->pllref_clk);
> if (ret) {
> dev_err(dev, "%s: Failed to enable pllref_clk\n", __func__);
> @@ -1280,7 +1327,7 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
> }
>
> static void dw_mipi_dsi_unbind(struct device *dev, struct device *master,
> - void *data)
> + void *data)
Unrelated whitespace change
> {
> struct dw_mipi_dsi *dsi = dev_get_drvdata(dev);
>
> --
> 2.6.3
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Sean Paul, Software Engineer, Google / Chromium OS
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