From: Tomi Valkeinen <tomi.valkeinen@ti.com>
Date: Thu, 5 Apr 2018 09:55:37 +0300
Subject: drm/omap: fix crash if there's no video PLL
Git-commit: 41613a1a7df27a0aa34bf77d51278bbe8e108a8f
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Commit 8a7eda7686675b73d74c22c0d5b83059f9d783f6 ("drm: omapdrm: dispc:
Pass DISPC pointer to remaining dispc API functions") made dpi.c use
ctx->pll even when there's no PLL, causing a crash at modeset on AM4
EVM, and presumably all OMAP2/3 boards.
Fix this by having struct dpi_data pointer in the ctx instead, giving
access to dispc without going through the pll.
Fixes: 8a7eda768667 ("drm: omapdrm: dispc: Pass DISPC pointer to remaining dispc API functions")
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reported-by: Keerthy <j-keerthy@ti.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180405065537.29818-1-tomi.valkeinen@ti.com
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/omapdrm/dss/dpi.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
--- a/drivers/gpu/drm/omapdrm/dss/dpi.c
+++ b/drivers/gpu/drm/omapdrm/dss/dpi.c
@@ -142,7 +142,7 @@ static enum dss_clk_source dpi_get_clk_s
}
struct dpi_clk_calc_ctx {
- struct dss_pll *pll;
+ struct dpi_data *dpi;
unsigned int clkout_idx;
/* inputs */
@@ -191,7 +191,7 @@ static bool dpi_calc_hsdiv_cb(int m_disp
ctx->pll_cinfo.mX[ctx->clkout_idx] = m_dispc;
ctx->pll_cinfo.clkout[ctx->clkout_idx] = dispc;
- return dispc_div_calc(ctx->pll->dss->dispc, dispc,
+ return dispc_div_calc(ctx->dpi->dss->dispc, dispc,
ctx->pck_min, ctx->pck_max,
dpi_calc_dispc_cb, ctx);
}
@@ -208,8 +208,8 @@ static bool dpi_calc_pll_cb(int n, int m
ctx->pll_cinfo.fint = fint;
ctx->pll_cinfo.clkdco = clkdco;
- return dss_pll_hsdiv_calc_a(ctx->pll, clkdco,
- ctx->pck_min, dss_get_max_fck_rate(ctx->pll->dss),
+ return dss_pll_hsdiv_calc_a(ctx->dpi->pll, clkdco,
+ ctx->pck_min, dss_get_max_fck_rate(ctx->dpi->dss),
dpi_calc_hsdiv_cb, ctx);
}
@@ -219,7 +219,7 @@ static bool dpi_calc_dss_cb(unsigned lon
ctx->fck = fck;
- return dispc_div_calc(ctx->pll->dss->dispc, fck,
+ return dispc_div_calc(ctx->dpi->dss->dispc, fck,
ctx->pck_min, ctx->pck_max,
dpi_calc_dispc_cb, ctx);
}
@@ -230,7 +230,7 @@ static bool dpi_pll_clk_calc(struct dpi_
unsigned long clkin;
memset(ctx, 0, sizeof(*ctx));
- ctx->pll = dpi->pll;
+ ctx->dpi = dpi;
ctx->clkout_idx = dss_pll_get_clkout_idx_for_src(dpi->clk_src);
clkin = clk_get_rate(dpi->pll->clkin);
@@ -244,7 +244,7 @@ static bool dpi_pll_clk_calc(struct dpi_
pll_min = 0;
pll_max = 0;
- return dss_pll_calc_a(ctx->pll, clkin,
+ return dss_pll_calc_a(ctx->dpi->pll, clkin,
pll_min, pll_max,
dpi_calc_pll_cb, ctx);
} else { /* DSS_PLL_TYPE_B */
@@ -275,6 +275,7 @@ static bool dpi_dss_clk_calc(struct dpi_
bool ok;
memset(ctx, 0, sizeof(*ctx));
+ ctx->dpi = dpi;
if (pck > 1000 * i * i * i)
ctx->pck_min = max(pck - 1000 * i * i * i, 0lu);
else