| Message ID | 20201005134250.527153-2-marex@denx.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/3] drm/exynos: Init the DSIM PHY in samsung_dsim_enable() | expand |
On 05.10.20 15:42, Marek Vasut wrote: > The value programmed into horizontal porch and sync registers must be > scaled to the correct number of DSI lanes and bpp, make it so. > > Signed-off-by: Marek Vasut <marex@denx.de> > Cc: Fabio Estevam <festevam@gmail.com> > Cc: Guido Günther <agx@sigxcpu.org> > Cc: Jaehoon Chung <jh80.chung@samsung.com> > Cc: Lucas Stach <l.stach@pengutronix.de> > Cc: Marek Szyprowski <m.szyprowski@samsung.com> > Cc: Michael Tretter <m.tretter@pengutronix.de> > Cc: NXP Linux Team <linux-imx@nxp.com> > Cc: Shawn Guo <shawnguo@kernel.org> > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-samsung-soc@vger.kernel.org > To: dri-devel@lists.freedesktop.org > -- > NOTE: This depends on https://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpatchwork.kernel.org%2Fproject%2Fdri-devel%2Flist%2F%3Fseries%3D347439&data=02%7C01%7Cfrieder.schrempf%40kontron.de%7Ca88f0cdec137451033ab08d86934dbe6%7C8c9d3c973fd941c8a2b1646f3942daf1%7C0%7C0%7C637375023034158708&sdata=l2pnC0dfueaAGSfwHOK3OpBUJ%2FxnbFKrlpRWlBakVvo%3D&reserved=0 > --- > drivers/gpu/drm/bridge/samsung-dsim.c | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c > index fbd87a74eb9f..42b49546dd00 100644 > --- a/drivers/gpu/drm/bridge/samsung-dsim.c > +++ b/drivers/gpu/drm/bridge/samsung-dsim.c > @@ -740,20 +740,23 @@ static void samsung_dsim_set_display_mode(struct samsung_dsim *dsi) > { > struct drm_display_mode *m = &dsi->mode; > unsigned int num_bits_resol = dsi->driver_data->num_bits_resol; > + int bpp; > u32 reg; > > if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) { > + bpp = mipi_dsi_pixel_format_to_bpp(dsi->format) / 8; > + > reg = DSIM_CMD_ALLOW(0xf) > | DSIM_STABLE_VFP(m->vsync_start - m->vdisplay) > | DSIM_MAIN_VBP(m->vtotal - m->vsync_end); > samsung_dsim_write(dsi, DSIM_MVPORCH_REG, reg); > > - reg = DSIM_MAIN_HFP(m->hsync_start - m->hdisplay) > - | DSIM_MAIN_HBP(m->htotal - m->hsync_end); > + reg = DSIM_MAIN_HFP((m->hsync_start - m->hdisplay) * bpp / dsi->lanes) > + | DSIM_MAIN_HBP((m->htotal - m->hsync_end) * bpp / dsi->lanes); > samsung_dsim_write(dsi, DSIM_MHPORCH_REG, reg); > > reg = DSIM_MAIN_VSA(m->vsync_end - m->vsync_start) > - | DSIM_MAIN_HSA(m->hsync_end - m->hsync_start); > + | DSIM_MAIN_HSA((m->hsync_end - m->hsync_start) * bpp / dsi->lanes); > samsung_dsim_write(dsi, DSIM_MSYNC_REG, reg); I did a bit of testing with the DSIM and BLK-CTL on i.MX8MM and I'm seeing some issues with these settings. I think your changes are correct, but to get my display configuration working I still need to add this [1] ported from the downstream driver [2]. Though, I can't really tell if this is a correct fix or something else is wrong. [1] https://github.com/fschrempf/linux/commit/65e50ebc38706ca9b5b3dec8a6ab9b28907f5d3a [2] https://source.codeaurora.org/external/imx/linux-imx/tree/drivers/gpu/drm/bridge/sec-dsim.c?h=imx_5.4.47_2.2.0#n932 > } > reg = DSIM_MAIN_HRESOL(m->hdisplay, num_bits_resol) | >
diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c index fbd87a74eb9f..42b49546dd00 100644 --- a/drivers/gpu/drm/bridge/samsung-dsim.c +++ b/drivers/gpu/drm/bridge/samsung-dsim.c @@ -740,20 +740,23 @@ static void samsung_dsim_set_display_mode(struct samsung_dsim *dsi) { struct drm_display_mode *m = &dsi->mode; unsigned int num_bits_resol = dsi->driver_data->num_bits_resol; + int bpp; u32 reg; if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) { + bpp = mipi_dsi_pixel_format_to_bpp(dsi->format) / 8; + reg = DSIM_CMD_ALLOW(0xf) | DSIM_STABLE_VFP(m->vsync_start - m->vdisplay) | DSIM_MAIN_VBP(m->vtotal - m->vsync_end); samsung_dsim_write(dsi, DSIM_MVPORCH_REG, reg); - reg = DSIM_MAIN_HFP(m->hsync_start - m->hdisplay) - | DSIM_MAIN_HBP(m->htotal - m->hsync_end); + reg = DSIM_MAIN_HFP((m->hsync_start - m->hdisplay) * bpp / dsi->lanes) + | DSIM_MAIN_HBP((m->htotal - m->hsync_end) * bpp / dsi->lanes); samsung_dsim_write(dsi, DSIM_MHPORCH_REG, reg); reg = DSIM_MAIN_VSA(m->vsync_end - m->vsync_start) - | DSIM_MAIN_HSA(m->hsync_end - m->hsync_start); + | DSIM_MAIN_HSA((m->hsync_end - m->hsync_start) * bpp / dsi->lanes); samsung_dsim_write(dsi, DSIM_MSYNC_REG, reg); } reg = DSIM_MAIN_HRESOL(m->hdisplay, num_bits_resol) |
The value programmed into horizontal porch and sync registers must be scaled to the correct number of DSI lanes and bpp, make it so. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Fabio Estevam <festevam@gmail.com> Cc: Guido Günther <agx@sigxcpu.org> Cc: Jaehoon Chung <jh80.chung@samsung.com> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Michael Tretter <m.tretter@pengutronix.de> Cc: NXP Linux Team <linux-imx@nxp.com> Cc: Shawn Guo <shawnguo@kernel.org> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-samsung-soc@vger.kernel.org To: dri-devel@lists.freedesktop.org -- NOTE: This depends on https://patchwork.kernel.org/project/dri-devel/list/?series=347439 --- drivers/gpu/drm/bridge/samsung-dsim.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)