On Thursday 05 April 2018 12:25 PM, Tomi Valkeinen wrote:
> 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.
Tested for display coming up on boot which was earlier broken on
am437x-gp-evm.
Tested-by: Keerthy <j-keer...@ti.com>
>
> Signed-off-by: Tomi Valkeinen <tomi.valkei...@ti.com>
> Reported-by: Keerthy <j-keer...@ti.com>
> Cc: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> ---
> drivers/gpu/drm/omapdrm/dss/dpi.c | 15 ++++++++-------
> 1 file changed, 8 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/omapdrm/dss/dpi.c
> b/drivers/gpu/drm/omapdrm/dss/dpi.c
> index fb1c27f69e3a..3d662e6805eb 100644
> --- 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_src(struct
> dpi_data *dpi)
> }
>
> 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_dispc, unsigned long
> dispc,
> 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, unsigned long
> fint,
> 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 long fck, void *data)
>
> 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_data *dpi,
> unsigned long pck,
> 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_data *dpi,
> unsigned long pck,
> 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_data *dpi,
> unsigned long pck,
> 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
>
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