Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit fa6251a7 authored by Yannick Fertré's avatar Yannick Fertré Committed by Benjamin Gaignard
Browse files

drm/stm: dsi: check hardware version 



Check version of DSI hardware IP. Only versions 1.30 & 1.31
are supported.

Signed-off-by: default avatarYannick Fertré <yannick.fertre@st.com>
Acked-by: default avatarPhilippe Cornu <philippe.cornu@st.com>
Signed-off-by: default avatarBenjamin Gaignard <benjamin.gaignard@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1557500579-19720-1-git-send-email-yannick.fertre@st.com
parent fd6905fc

drivers/gpu/drm/stm/dw_mipi_dsi-stm.c

+23 −1
Original line number Diff line number Diff line
@@ -227,7 +227,6 @@ dw_mipi_dsi_get_lane_mbps(void *priv_data, const struct drm_display_mode *mode, 
	u32 val;



	/* Update lane capabilities according to hw version */

	dsi->hw_version = dsi_read(dsi, DSI_VERSION) & VERSION;

	dsi->lane_min_kbps = LANE_MIN_KBPS;

	dsi->lane_max_kbps = LANE_MAX_KBPS;

	if (dsi->hw_version == HWVER_131) {
@@ -306,6 +305,7 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev) 
{

	struct device *dev = &pdev->dev;

	struct dw_mipi_dsi_stm *dsi;

	struct clk *pclk;

	struct resource *res;

	int ret;
@@ -348,6 +348,28 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev) 
		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);

		goto err_dsi_probe;

	}



	ret = clk_prepare_enable(pclk);

	if (ret) {

		DRM_ERROR("%s: Failed to enable peripheral clk\n", __func__);

		goto err_dsi_probe;

	}



	dsi->hw_version = dsi_read(dsi, DSI_VERSION) & VERSION;

	clk_disable_unprepare(pclk);



	if (dsi->hw_version != HWVER_130 && dsi->hw_version != HWVER_131) {

		ret = -ENODEV;

		DRM_ERROR("bad dsi hardware version\n");

		goto err_dsi_probe;

	}



	dw_mipi_dsi_stm_plat_data.base = dsi->base;

	dw_mipi_dsi_stm_plat_data.priv_data = dsi;