From: Maxime Ripard <maxime.ripard@bootlin.com>
To: Kishon Vijay Abraham I <kishon@ti.com>,
Boris Brezillon <boris.brezillon@bootlin.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
linux-media@vger.kernel.org,
Archit Taneja <architt@codeaurora.org>,
Andrzej Hajda <a.hajda@samsung.com>, Chen-Yu Tsai <wens@csie.org>,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
linux-arm-kernel@lists.infradead.org,
Krzysztof Witos <kwitos@cadence.com>,
Rafal Ciepiela <rafalc@cadence.com>,
Maxime Ripard <maxime.ripard@bootlin.com>
Subject: [PATCH v3 07/10] drm/bridge: cdns: Separate DSI and D-PHY configuration
Date: Fri, 7 Dec 2018 14:55:34 +0100 [thread overview]
Message-ID: <69b0ffe7d3eebc83f3f3116473b7f978d2ce265d.1544190837.git-series.maxime.ripard@bootlin.com> (raw)
In-Reply-To: <cover.ad7c4feb3905658f10b022df4756a5ade280011f.1544190837.git-series.maxime.ripard@bootlin.com>
The current configuration of the DSI bridge and its associated D-PHY is
intertwined. In order to ease the future conversion to the phy framework
for the D-PHY part, let's split the configuration in two.
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
---
drivers/gpu/drm/bridge/cdns-dsi.c | 96 ++++++++++++++++++++++----------
1 file changed, 68 insertions(+), 28 deletions(-)
diff --git a/drivers/gpu/drm/bridge/cdns-dsi.c b/drivers/gpu/drm/bridge/cdns-dsi.c
index ce9496d13986..3ac6dd524b6d 100644
--- a/drivers/gpu/drm/bridge/cdns-dsi.c
+++ b/drivers/gpu/drm/bridge/cdns-dsi.c
@@ -545,6 +545,11 @@ bridge_to_cdns_dsi_input(struct drm_bridge *bridge)
return container_of(bridge, struct cdns_dsi_input, bridge);
}
+static unsigned int mode_to_dpi_hfp(const struct drm_display_mode *mode)
+{
+ return mode->crtc_hsync_start - mode->crtc_hdisplay;
+}
+
static int cdns_dsi_get_dphy_pll_cfg(struct cdns_dphy *dphy,
struct cdns_dphy_cfg *cfg,
unsigned int dpi_htotal,
@@ -731,14 +736,12 @@ static unsigned int dpi_to_dsi_timing(unsigned int dpi_timing,
static int cdns_dsi_mode2cfg(struct cdns_dsi *dsi,
const struct drm_display_mode *mode,
struct cdns_dsi_cfg *dsi_cfg,
- struct cdns_dphy_cfg *dphy_cfg,
bool mode_valid_check)
{
- unsigned long dsi_htotal = 0, dsi_hss_hsa_hse_hbp = 0;
struct cdns_dsi_output *output = &dsi->output;
- unsigned int dsi_hfp_ext = 0, dpi_hfp, tmp;
+ unsigned int tmp;
bool sync_pulse = false;
- int bpp, nlanes, ret;
+ int bpp, nlanes;
memset(dsi_cfg, 0, sizeof(*dsi_cfg));
@@ -757,8 +760,6 @@ static int cdns_dsi_mode2cfg(struct cdns_dsi *dsi,
mode->crtc_hsync_end : mode->crtc_hsync_start);
dsi_cfg->hbp = dpi_to_dsi_timing(tmp, bpp, DSI_HBP_FRAME_OVERHEAD);
- dsi_htotal += dsi_cfg->hbp + DSI_HBP_FRAME_OVERHEAD;
- dsi_hss_hsa_hse_hbp += dsi_cfg->hbp + DSI_HBP_FRAME_OVERHEAD;
if (sync_pulse) {
if (mode_valid_check)
@@ -768,49 +769,90 @@ static int cdns_dsi_mode2cfg(struct cdns_dsi *dsi,
dsi_cfg->hsa = dpi_to_dsi_timing(tmp, bpp,
DSI_HSA_FRAME_OVERHEAD);
- dsi_htotal += dsi_cfg->hsa + DSI_HSA_FRAME_OVERHEAD;
- dsi_hss_hsa_hse_hbp += dsi_cfg->hsa + DSI_HSA_FRAME_OVERHEAD;
}
dsi_cfg->hact = dpi_to_dsi_timing(mode_valid_check ?
mode->hdisplay : mode->crtc_hdisplay,
bpp, 0);
- dsi_htotal += dsi_cfg->hact;
+ dsi_cfg->hfp = dpi_to_dsi_timing(mode_to_dpi_hfp(mode), bpp,
+ DSI_HFP_FRAME_OVERHEAD);
- if (mode_valid_check)
- dpi_hfp = mode->hsync_start - mode->hdisplay;
- else
- dpi_hfp = mode->crtc_hsync_start - mode->crtc_hdisplay;
+ return 0;
+}
+
+static int cdns_dphy_validate(struct cdns_dsi *dsi,
+ struct cdns_dsi_cfg *dsi_cfg,
+ struct cdns_dphy_cfg *dphy_cfg,
+ const struct drm_display_mode *mode,
+ bool mode_valid_check)
+{
+ struct cdns_dsi_output *output = &dsi->output;
+ unsigned long dsi_htotal;
+ unsigned int dsi_hfp_ext = 0;
+
+ int ret;
- dsi_cfg->hfp = dpi_to_dsi_timing(dpi_hfp, bpp, DSI_HFP_FRAME_OVERHEAD);
+ dsi_htotal = dsi_cfg->hbp + DSI_HBP_FRAME_OVERHEAD;
+ if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+ dsi_htotal += dsi_cfg->hsa + DSI_HSA_FRAME_OVERHEAD;
+
+ dsi_htotal += dsi_cfg->hact;
dsi_htotal += dsi_cfg->hfp + DSI_HFP_FRAME_OVERHEAD;
if (mode_valid_check)
ret = cdns_dsi_get_dphy_pll_cfg(dsi->dphy, dphy_cfg,
- mode->htotal, bpp,
+ mode->htotal,
mode->clock * 1000,
- dsi_htotal, nlanes,
+ mipi_dsi_pixel_format_to_bpp(output->dev->format),
+ dsi_htotal,
+ output->dev->lanes,
&dsi_hfp_ext);
else
ret = cdns_dsi_get_dphy_pll_cfg(dsi->dphy, dphy_cfg,
- mode->crtc_htotal, bpp,
+ mode->crtc_htotal,
+ mipi_dsi_pixel_format_to_bpp(output->dev->format),
mode->crtc_clock * 1000,
- dsi_htotal, nlanes,
+ dsi_htotal,
+ output->dev->lanes,
&dsi_hfp_ext);
-
if (ret)
return ret;
dsi_cfg->hfp += dsi_hfp_ext;
- dsi_htotal += dsi_hfp_ext;
- dsi_cfg->htotal = dsi_htotal;
+ dsi_cfg->htotal = dsi_htotal + dsi_hfp_ext;
+
+ return 0;
+}
+
+static int cdns_dsi_check_conf(struct cdns_dsi *dsi,
+ const struct drm_display_mode *mode,
+ struct cdns_dsi_cfg *dsi_cfg,
+ struct cdns_dphy_cfg *dphy_cfg,
+ bool mode_valid_check)
+{
+ struct cdns_dsi_output *output = &dsi->output;
+ unsigned long dsi_hss_hsa_hse_hbp;
+ unsigned int nlanes = output->dev->lanes;
+ int ret;
+
+ ret = cdns_dsi_mode2cfg(dsi, mode, dsi_cfg, mode_valid_check);
+ if (ret)
+ return ret;
+
+ ret = cdns_dphy_validate(dsi, dsi_cfg, dphy_cfg, mode, mode_valid_check);
+ if (ret)
+ return ret;
+
+ dsi_hss_hsa_hse_hbp = dsi_cfg->hbp + DSI_HBP_FRAME_OVERHEAD;
+ if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+ dsi_hss_hsa_hse_hbp += dsi_cfg->hsa + DSI_HSA_FRAME_OVERHEAD;
/*
* Make sure DPI(HFP) > DSI(HSS+HSA+HSE+HBP) to guarantee that the FIFO
* is empty before we start a receiving a new line on the DPI
* interface.
*/
- if ((u64)dphy_cfg->lane_bps * dpi_hfp * nlanes <
+ if ((u64)dphy_cfg->lane_bps * mode_to_dpi_hfp(mode) * nlanes <
(u64)dsi_hss_hsa_hse_hbp *
(mode_valid_check ? mode->clock : mode->crtc_clock) * 1000)
return -EINVAL;
@@ -842,7 +884,7 @@ cdns_dsi_bridge_mode_valid(struct drm_bridge *bridge,
struct cdns_dsi_output *output = &dsi->output;
struct cdns_dphy_cfg dphy_cfg;
struct cdns_dsi_cfg dsi_cfg;
- int bpp, nlanes, ret;
+ int bpp, ret;
/*
* VFP_DSI should be less than VFP_DPI and VFP_DSI should be at
@@ -860,11 +902,9 @@ cdns_dsi_bridge_mode_valid(struct drm_bridge *bridge,
if ((mode->hdisplay * bpp) % 32)
return MODE_H_ILLEGAL;
- nlanes = output->dev->lanes;
-
- ret = cdns_dsi_mode2cfg(dsi, mode, &dsi_cfg, &dphy_cfg, true);
+ ret = cdns_dsi_check_conf(dsi, mode, &dsi_cfg, &dphy_cfg, true);
if (ret)
- return MODE_CLOCK_RANGE;
+ return MODE_BAD;
return MODE_OK;
}
@@ -990,7 +1030,7 @@ static void cdns_dsi_bridge_enable(struct drm_bridge *bridge)
bpp = mipi_dsi_pixel_format_to_bpp(output->dev->format);
nlanes = output->dev->lanes;
- WARN_ON_ONCE(cdns_dsi_mode2cfg(dsi, mode, &dsi_cfg, &dphy_cfg, false));
+ WARN_ON_ONCE(cdns_dsi_check_conf(dsi, mode, &dsi_cfg, &dphy_cfg, false));
cdns_dsi_hs_init(dsi, &dphy_cfg);
cdns_dsi_init_link(dsi);
--
git-series 0.9.1
next prev parent reply other threads:[~2018-12-07 13:56 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-07 13:55 [PATCH v3 00/10] phy: Add configuration interface for MIPI D-PHY devices Maxime Ripard
2018-12-07 13:55 ` [PATCH v3 01/10] phy: Add MIPI D-PHY mode Maxime Ripard
2018-12-07 13:55 ` [PATCH v3 02/10] phy: Add configuration interface Maxime Ripard
2018-12-13 20:42 ` sakari.ailus
2018-12-07 13:55 ` [PATCH v3 03/10] phy: Add MIPI D-PHY configuration options Maxime Ripard
2018-12-13 20:49 ` sakari.ailus
2018-12-17 15:49 ` Maxime Ripard
2018-12-17 20:20 ` sakari.ailus
2018-12-19 15:40 ` Maxime Ripard
2018-12-13 20:54 ` sakari.ailus
2018-12-13 20:55 ` sakari.ailus
2018-12-07 13:55 ` [PATCH v3 04/10] phy: dphy: Add configuration helpers Maxime Ripard
2018-12-07 13:55 ` [PATCH v3 05/10] sun6i: dsi: Convert to generic phy handling Maxime Ripard
2018-12-07 13:55 ` [PATCH v3 06/10] phy: Move Allwinner A31 D-PHY driver to drivers/phy/ Maxime Ripard
2018-12-07 13:55 ` Maxime Ripard [this message]
2018-12-07 13:55 ` [PATCH v3 08/10] dt-bindings: phy: Move the Cadence D-PHY bindings Maxime Ripard
2018-12-07 13:55 ` [PATCH v3 09/10] phy: Add Cadence D-PHY support Maxime Ripard
2018-12-07 13:55 ` [PATCH v3 10/10] drm/bridge: cdns: Convert to phy framework Maxime Ripard
2018-12-09 4:37 ` kbuild test robot
2018-12-20 10:52 ` kbuild test robot
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