mirror of https://gitee.com/openkylin/linux.git
drm/msm/dsi: Enable MMSS SPFB port via syscon
For DSIv2 to work, we need to enable MMSS_AHB_ARB_MASTER_PORT in MMSS_SFPB. We enable the required bitfield by retrieving MMSS_SFPB regmap pointer via syscon. Signed-off-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
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commit
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drivers/gpu/drm/msm/dsi
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@ -24,10 +24,13 @@
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#include <linux/of_graph.h>
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#include <linux/regulator/consumer.h>
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#include <linux/spinlock.h>
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#include <linux/mfd/syscon.h>
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#include <linux/regmap.h>
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#include <video/mipi_display.h>
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#include "dsi.h"
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#include "dsi.xml.h"
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#include "sfpb.xml.h"
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#include "dsi_cfg.h"
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static int dsi_get_version(const void __iomem *base, u32 *major, u32 *minor)
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@ -149,6 +152,8 @@ struct msm_dsi_host {
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u8 *rx_buf;
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struct regmap *sfpb;
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struct drm_display_mode *mode;
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/* connected device info */
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@ -1568,6 +1573,16 @@ static int dsi_host_parse_dt(struct msm_dsi_host *msm_host)
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msm_host->device_node = device_node;
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if (of_property_read_bool(np, "syscon-sfpb")) {
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msm_host->sfpb = syscon_regmap_lookup_by_phandle(np,
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"syscon-sfpb");
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if (IS_ERR(msm_host->sfpb)) {
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dev_err(dev, "%s: failed to get sfpb regmap\n",
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__func__);
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return PTR_ERR(msm_host->sfpb);
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}
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}
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return 0;
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}
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@ -2031,6 +2046,20 @@ int msm_dsi_host_disable(struct mipi_dsi_host *host)
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return 0;
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}
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static void msm_dsi_sfpb_config(struct msm_dsi_host *msm_host, bool enable)
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{
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enum sfpb_ahb_arb_master_port_en en;
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if (!msm_host->sfpb)
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return;
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en = enable ? SFPB_MASTER_PORT_ENABLE : SFPB_MASTER_PORT_DISABLE;
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regmap_update_bits(msm_host->sfpb, REG_SFPB_GPREG,
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SFPB_GPREG_MASTER_PORT_EN__MASK,
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SFPB_GPREG_MASTER_PORT_EN(en));
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}
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int msm_dsi_host_power_on(struct mipi_dsi_host *host)
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{
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struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
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@ -2043,6 +2072,8 @@ int msm_dsi_host_power_on(struct mipi_dsi_host *host)
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goto unlock_ret;
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}
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msm_dsi_sfpb_config(msm_host, true);
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ret = dsi_calc_clk_rate(msm_host);
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if (ret) {
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pr_err("%s: unable to calc clk rate, %d\n", __func__, ret);
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@ -2130,6 +2161,8 @@ int msm_dsi_host_power_off(struct mipi_dsi_host *host)
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dsi_host_regulator_disable(msm_host);
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msm_dsi_sfpb_config(msm_host, false);
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DBG("-");
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msm_host->power_on = false;
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