Re: [PATCH v2] drm/stm: dsi: Use dev_ based logging

From: Philippe CORNU
Date: Thu Oct 15 2020 - 09:27:13 EST



On 10/13/20 9:56 AM, Yannick Fertre wrote:
> Standardize on the dev_ based logging.
>
> Signed-off-by: Yannick Fertre <yannick.fertre@xxxxxx>
> ---
> Changes in v2:
> - restore function dsi_color_from_mipi.
> - reword commit.
>
> drivers/gpu/drm/stm/dw_mipi_dsi-stm.c | 55 ++++++++++++++-------------
> 1 file changed, 29 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> index 164f79ef6269..a5a87c89aa07 100644
> --- a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> +++ b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> @@ -76,6 +76,7 @@ enum dsi_color {
>
> struct dw_mipi_dsi_stm {
> void __iomem *base;
> + struct device *dev;
> struct clk *pllref_clk;
> struct dw_mipi_dsi *dsi;
> u32 hw_version;
> @@ -110,7 +111,8 @@ static inline void dsi_update_bits(struct dw_mipi_dsi_stm *dsi, u32 reg,
> dsi_write(dsi, reg, (dsi_read(dsi, reg) & ~mask) | val);
> }
>
> -static enum dsi_color dsi_color_from_mipi(enum mipi_dsi_pixel_format fmt)
> +static enum dsi_color dsi_color_from_mipi(struct dw_mipi_dsi_stm *dsi,
> + enum mipi_dsi_pixel_format fmt)
> {
> switch (fmt) {
> case MIPI_DSI_FMT_RGB888:
> @@ -122,7 +124,7 @@ static enum dsi_color dsi_color_from_mipi(enum mipi_dsi_pixel_format fmt)
> case MIPI_DSI_FMT_RGB565:
> return DSI_RGB565_CONF1;
> default:
> - DRM_DEBUG_DRIVER("MIPI color invalid, so we use rgb888\n");
> + dev_dbg(dsi->dev, "MIPI color invalid, so we use rgb888\n");
> }
> return DSI_RGB888;
> }
> @@ -205,14 +207,14 @@ static int dw_mipi_dsi_phy_init(void *priv_data)
> ret = readl_poll_timeout(dsi->base + DSI_WISR, val, val & WISR_RRS,
> SLEEP_US, TIMEOUT_US);
> if (ret)
> - DRM_DEBUG_DRIVER("!TIMEOUT! waiting REGU, let's continue\n");
> + dev_dbg(dsi->dev, "!TIMEOUT! waiting REGU, let's continue\n");
>
> /* Enable the DSI PLL & wait for its lock */
> dsi_set(dsi, DSI_WRPCR, WRPCR_PLLEN);
> ret = readl_poll_timeout(dsi->base + DSI_WISR, val, val & WISR_PLLLS,
> SLEEP_US, TIMEOUT_US);
> if (ret)
> - DRM_DEBUG_DRIVER("!TIMEOUT! waiting PLL, let's continue\n");
> + dev_dbg(dsi->dev, "!TIMEOUT! waiting PLL, let's continue\n");
>
> return 0;
> }
> @@ -221,7 +223,7 @@ static void dw_mipi_dsi_phy_power_on(void *priv_data)
> {
> struct dw_mipi_dsi_stm *dsi = priv_data;
>
> - DRM_DEBUG_DRIVER("\n");
> + dev_dbg(dsi->dev, "\n");
>
> /* Enable the DSI wrapper */
> dsi_set(dsi, DSI_WCR, WCR_DSIEN);
> @@ -231,7 +233,7 @@ static void dw_mipi_dsi_phy_power_off(void *priv_data)
> {
> struct dw_mipi_dsi_stm *dsi = priv_data;
>
> - DRM_DEBUG_DRIVER("\n");
> + dev_dbg(dsi->dev, "\n");
>
> /* Disable the DSI wrapper */
> dsi_clear(dsi, DSI_WCR, WCR_DSIEN);
> @@ -267,11 +269,11 @@ dw_mipi_dsi_get_lane_mbps(void *priv_data, const struct drm_display_mode *mode,
>
> if (pll_out_khz > dsi->lane_max_kbps) {
> pll_out_khz = dsi->lane_max_kbps;
> - DRM_WARN("Warning max phy mbps is used\n");
> + dev_warn(dsi->dev, "Warning max phy mbps is used\n");
> }
> if (pll_out_khz < dsi->lane_min_kbps) {
> pll_out_khz = dsi->lane_min_kbps;
> - DRM_WARN("Warning min phy mbps is used\n");
> + dev_warn(dsi->dev, "Warning min phy mbps is used\n");
> }
>
> /* Compute best pll parameters */
> @@ -281,7 +283,7 @@ dw_mipi_dsi_get_lane_mbps(void *priv_data, const struct drm_display_mode *mode,
> ret = dsi_pll_get_params(dsi, pll_in_khz, pll_out_khz,
> &idf, &ndiv, &odf);
> if (ret)
> - DRM_WARN("Warning dsi_pll_get_params(): bad params\n");
> + dev_warn(dsi->dev, "Warning dsi_pll_get_params(): bad params\n");
>
> /* Get the adjusted pll out value */
> pll_out_khz = dsi_pll_get_clkout_khz(pll_in_khz, idf, ndiv, odf);
> @@ -299,12 +301,12 @@ dw_mipi_dsi_get_lane_mbps(void *priv_data, const struct drm_display_mode *mode,
>
> /* Select the color coding */
> dsi_update_bits(dsi, DSI_WCFGR, WCFGR_COLMUX,
> - dsi_color_from_mipi(format) << 1);
> + dsi_color_from_mipi(dsi, format) << 1);
>
> *lane_mbps = pll_out_khz / 1000;
>
> - DRM_DEBUG_DRIVER("pll_in %ukHz pll_out %ukHz lane_mbps %uMHz\n",
> - pll_in_khz, pll_out_khz, *lane_mbps);
> + dev_dbg(dsi->dev, "pll_in %ukHz pll_out %ukHz lane_mbps %uMHz\n", pll_in_khz, pll_out_khz,
> + *lane_mbps);

Hi Yannick,
And thank you for your patch.

You forgot to take into account the minor comment from Joe Perches.

Anyway,
Reviewed-by: Philippe Cornu <philippe.cornu@xxxxxx>
Thank you
Philippe :-)

>
> return 0;
> }
> @@ -352,11 +354,13 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev)
> if (!dsi)
> return -ENOMEM;
>
> + dsi->dev = dev;
> +
> res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> dsi->base = devm_ioremap_resource(dev, res);
> if (IS_ERR(dsi->base)) {
> ret = PTR_ERR(dsi->base);
> - DRM_ERROR("Unable to get dsi registers %d\n", ret);
> + dev_err(dev, "Unable to get dsi registers %d\n", ret);
> return ret;
> }
>
> @@ -364,13 +368,13 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev)
> if (IS_ERR(dsi->vdd_supply)) {
> ret = PTR_ERR(dsi->vdd_supply);
> if (ret != -EPROBE_DEFER)
> - DRM_ERROR("Failed to request regulator: %d\n", ret);
> + dev_err(dev, "Failed to request regulator: %d\n", ret);
> return ret;
> }
>
> ret = regulator_enable(dsi->vdd_supply);
> if (ret) {
> - DRM_ERROR("Failed to enable regulator: %d\n", ret);
> + dev_err(dev, "Failed to enable regulator: %d\n", ret);
> return ret;
> }
>
> @@ -378,27 +382,26 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev)
> if (IS_ERR(dsi->pllref_clk)) {
> ret = PTR_ERR(dsi->pllref_clk);
> if (ret != -EPROBE_DEFER)
> - DRM_ERROR("Unable to get pll reference clock: %d\n",
> - ret);
> + dev_err(dev, "Unable to get pll reference clock: %d\n", ret);
> goto err_clk_get;
> }
>
> ret = clk_prepare_enable(dsi->pllref_clk);
> if (ret) {
> - DRM_ERROR("Failed to enable pllref_clk: %d\n", ret);
> + dev_err(dev, "Failed to enable pllref_clk: %d\n", ret);
> goto err_clk_get;
> }
>
> pclk = devm_clk_get(dev, "pclk");
> if (IS_ERR(pclk)) {
> ret = PTR_ERR(pclk);
> - DRM_ERROR("Unable to get peripheral clock: %d\n", ret);
> + dev_err(dev, "Unable to get peripheral clock: %d\n", ret);
> goto err_dsi_probe;
> }
>
> ret = clk_prepare_enable(pclk);
> if (ret) {
> - DRM_ERROR("%s: Failed to enable peripheral clk\n", __func__);
> + dev_err(dev, "%s: Failed to enable peripheral clk\n", __func__);
> goto err_dsi_probe;
> }
>
> @@ -407,7 +410,7 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev)
>
> if (dsi->hw_version != HWVER_130 && dsi->hw_version != HWVER_131) {
> ret = -ENODEV;
> - DRM_ERROR("bad dsi hardware version\n");
> + dev_err(dev, "bad dsi hardware version\n");
> goto err_dsi_probe;
> }
>
> @@ -420,7 +423,7 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev)
> if (IS_ERR(dsi->dsi)) {
> ret = PTR_ERR(dsi->dsi);
> if (ret != -EPROBE_DEFER)
> - DRM_ERROR("Failed to initialize mipi dsi host: %d\n", ret);
> + dev_err(dev, "Failed to initialize mipi dsi host: %d\n", ret);
> goto err_dsi_probe;
> }
>
> @@ -449,7 +452,7 @@ static int __maybe_unused dw_mipi_dsi_stm_suspend(struct device *dev)
> {
> struct dw_mipi_dsi_stm *dsi = dw_mipi_dsi_stm_plat_data.priv_data;
>
> - DRM_DEBUG_DRIVER("\n");
> + dev_dbg(dsi->dev, "\n");
>
> clk_disable_unprepare(dsi->pllref_clk);
> regulator_disable(dsi->vdd_supply);
> @@ -462,18 +465,18 @@ static int __maybe_unused dw_mipi_dsi_stm_resume(struct device *dev)
> struct dw_mipi_dsi_stm *dsi = dw_mipi_dsi_stm_plat_data.priv_data;
> int ret;
>
> - DRM_DEBUG_DRIVER("\n");
> + dev_dbg(dsi->dev, "\n");
>
> ret = regulator_enable(dsi->vdd_supply);
> if (ret) {
> - DRM_ERROR("Failed to enable regulator: %d\n", ret);
> + dev_err(dev, "Failed to enable regulator: %d\n", ret);
> return ret;
> }
>
> ret = clk_prepare_enable(dsi->pllref_clk);
> if (ret) {
> regulator_disable(dsi->vdd_supply);
> - DRM_ERROR("Failed to enable pllref_clk: %d\n", ret);
> + dev_err(dev, "Failed to enable pllref_clk: %d\n", ret);
> return ret;
> }
>
>